CN103727784A - System energy saving method for domestic ceramic oxygen-enriched combustion shuttle kiln - Google Patents
System energy saving method for domestic ceramic oxygen-enriched combustion shuttle kiln Download PDFInfo
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- CN103727784A CN103727784A CN201410021257.5A CN201410021257A CN103727784A CN 103727784 A CN103727784 A CN 103727784A CN 201410021257 A CN201410021257 A CN 201410021257A CN 103727784 A CN103727784 A CN 103727784A
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Abstract
The invention provides a system energy saving method for a domestic ceramic oxygen-enriched combustion shuttle kiln. The system energy saving method for the domestic ceramic oxygen-enriched combustion shuttle kiln is characterized in that a system of the domestic ceramic oxygen-enriched combustion shuttle kilns is formed by connecting the two domestic ceramic oxygen-enriched combustion shuttle kilns through a waste heat utilization pipeline system; the system can be used for respectively controlling opening periods of the two domestic ceramic oxygen-enriched combustion shuttle kilns, and sucking hot gas inside the domestic ceramic oxygen-enriched combustion shuttle kiln in a sintering cooling period into the domestic ceramic oxygen-enriched combustion shuttle kiln in a sintering pre-heating period, so that products inside the domestic ceramic oxygen-enriched combustion shuttle kiln in the sintering pre-heating period are heated to a temperature of 200-400 DEG C without the condition that a burner is not ignited and fuel is not heated; and therefore, more than 10% of energy of the whole system can be saved.
Description
Technical field
The present invention relates to a kind of energy saving of system method of domestic ceramics oxygen-enriched combusting shuttle kiln.Be specially adapted to firing temperature burning till at the domestic ceramics of 1000～1300 ℃.
Background technology
Shuttle kiln, can be used for the production of architectural pottery, sanitary ceramics and domestic ceramics.Shuttle kiln is a kind of Thermal Equipment of doing downdraf (or flat flame) batch production at the bottom of kiln with kiln car.It is large that shuttle kiln has operating flexibility, can meet outside the advantages such as many variety production, and the part of its loading of kiln, kiln discharge and goods is cooling can carry out outward at kiln, has both improved working condition, can shorten again the turnaround time of kiln.But owing to intermittently burning till, accumulation of heat loss and the radiation loss of kiln are large, and flue-gas temperature is high, and heat consumption is higher.Be mainly used in burning till fast of domestic ceramics, construction sanitary ceramic goods.The production system of shuttle kiln is supplied with by fuel and combustion apparatus, burning blower fan, temperature adjustment blower fan and smoke exhaust fan etc. form.Typical domestic ceramics shuttle kiln is take light-duty, thin-walled, energy-conservation as feature, and its main feature is:
(1) adapt to Multi-varieties and Small-batch Production.
(2) adopt light thin wall formula kiln wall construction, liner adopts high temperature light material.
(3) handling brick carries out outward at kiln.
(4) adopt iso-jet burner, height layout straggly, ejection high velocity air, rotates airstream in kiln consumingly, and heat convection effect greatly improves, and in hot stage kiln, the each point temperature difference can be controlled in 5 ℃.At low thermophase, adopt temperature adjustment wind to increase exhaust gas volumn, regulate and spray into flue-gas temperature in kiln, in kiln, the temperature difference is between 5 ℃～10 ℃.Heat up, cooling rate is fast, firing period is short.
In general, the domestic ceramics shuttle kiln thermal efficiency is with respect to the ceramic calcination equipment of other type, and its thermal efficiency is on the low side.Along with domestic ceramics industrial expansion, its production scale is increasing, and consumption, discharge to the energy are also increasing, and environmental pressure is also increasing, in domestic ceramics shuttle kiln, adopt oxygen-enriched combustion technology, can effectively reduce consumption and the toxic emission of the energy.Due to the operation principle of shuttle kiln be pottery burn till overall process in must be through intensification preheating, high temperature constant temperature insulation and the stage such as cooling, and all above processes of necessary experience of burning till of not wanting, therefore, it is by being as cold as heat, again by heat in cold process, the latter half has many heats to run off with fume emission.In employing oxygen-enriched combustion technology domestic ceramics shuttle kiln, system relevant devices, makes full use of the heat in temperature-fall period, can effectively realize energy-saving and emission-reduction.
Summary of the invention
For solving the problem of the heat recovery and utilization in oxygen-enriched combusting domestic ceramics shuttle kiln temperature-fall period.The invention provides a kind of domestic ceramics oxygen-enriched combusting shuttle kiln energy saving of system method of (or claiming: oxygen-enriched combusting domestic ceramics shuttle kiln).By the synergy of this system, can effectively realize the efficient utilization of the heat of domestic ceramics oxygen-enriched combusting shuttle kiln in temperature-fall period and energy-saving and emission-reduction.
For achieving the above object, the technical solution used in the present invention is: a kind of energy saving of system method of domestic ceramics oxygen-enriched combusting shuttle kiln, it is characterized in that: two the domestic ceramics oxygen-enriched combusting shuttle kilns (or claiming: oxygen-enriched combusting domestic ceramics shuttle kiln) that are connected by UTILIZATION OF VESIDUAL HEAT IN pipe-line system form the system of domestic ceramics oxygen-enriched combusting shuttle kiln, control respectively the unlatching period of two domestic ceramics oxygen-enriched combusting shuttle kilns, the hot gas suction of burning till in the domestic ceramics oxygen-enriched combusting shuttle kiln of cooling stage is burnt till in the domestic ceramics oxygen-enriched combusting shuttle kiln of warm-up phase, it is not being put under the condition of burner use fuel heating, the product burning till in the domestic ceramics oxygen-enriched combusting shuttle kiln of warm-up phase is preheating to 200～400 ℃, realize the energy-conservation of whole system.
The system of described domestic ceramics oxygen-enriched combusting shuttle kiln comprises first domestic ceramics oxygen-enriched combusting shuttle kiln, second domestic ceramics oxygen-enriched combusting shuttle kiln and the UTILIZATION OF VESIDUAL HEAT IN pipe-line system that is connected two kilns, first domestic ceramics oxygen-enriched combusting shuttle kiln comprises the first chimney 1, first row smoke pipe 2, the first smoke exhaust fan 3, first regulates flashboard 4, the first flue 5, the first kiln bottom flue 6, the first combustion air pipeline 8, the first natural gas line 9, the first oxygenation pipeline 10, the first oxygen-enriched burner 11, the first kiln body, the first kiln body is provided with wicket, in the first kiln body, be that in the first kiln, goods are piled up district 16, the first kiln bottom flue 6 of the bottom of the first kiln body is connected with the first flue 5, the first flue 5 is connected with first row smoke pipe 2, first row smoke pipe 2 is provided with the first smoke exhaust fan 3, first regulates flashboard 4, first row smoke pipe 2 is connected with the first chimney 1, the first combustion air pipeline 8, the first natural gas line 9, the first oxygenation pipeline 10 is all connected with the first oxygen-enriched burner 11, the first oxygen-enriched burner 11 is arranged on the first kiln body,
Second domestic ceramics oxygen-enriched combusting shuttle kiln comprises the second kiln bottom flue 23, the second flue 24, the 4th regulates flashboard 25, the second smoke exhaust fan 26, second row smoke pipe 27, the second chimney 28, the second combustion air pipeline 30, the second natural gas line 31, the second oxygenation pipeline 32, the second oxygen-enriched burner 33, the second kiln body, the second kiln body is provided with wicket, in the second kiln body, be that in the second kiln, goods are piled up district 22, the second kiln bottom flue 23 of the bottom of the second kiln body is connected with the second flue 24, the second flue 24 is connected with second row smoke pipe 27, second row smoke pipe 27 is provided with the 4th and regulates flashboard 25, the second smoke exhaust fan 26, second row smoke pipe 27 is connected with the second chimney 28, the second combustion air pipeline 30, the second natural gas line 31, the second oxygenation pipeline 32 is all connected with the second oxygen-enriched burner 33, the second oxygen-enriched burner 33 is arranged on the second kiln body,
The UTILIZATION OF VESIDUAL HEAT IN pipe-line system that connects two kilns comprises that the first hot blast lateral 12, the first hot air duct 13, the second adjusting flashboard 14, the second hot air duct 18, the 3rd adjusting flashboard 19, the second hot blast lateral 21, the 5th adjusting flashboard 15, the 6th regulate flashboard 20, connect flue 17; The first hot blast lateral 12 at the top of the first kiln body is connected with the first hot air duct 13, and the first hot air duct 13 is provided with the second adjusting flashboard 14, the first hot air ducts 13 and is connected with the first flue 5; The second hot blast lateral 21 at the top of the second kiln body is connected with the second hot air duct 18, and the second hot air duct 18 is provided with the 3rd and regulates flashboard 19, the second hot air ducts 18 to be connected with the second flue 24; The one end that connects flue 17 is connected with the first flue 5, and the other end that connects flue 17 is connected with the second flue 24, and the 5th regulates flashboard 15 to be arranged on the first flue 5, and the 6th regulates flashboard 20 to be arranged on the second flue 24.
Concrete grammar is: the first kiln goods of domestic ceramics base substrate being put into first domestic ceramics oxygen-enriched combusting shuttle kiln are piled up district 16, shut wicket; Open first and regulate flashboard 4, then open the first smoke exhaust fan 3 and the first oxygen-enriched combusting control system 7; After oxygen-enriched air and natural gas mix, start igniting calcining; Natural gas burns by the first oxygen-enriched burner 11, the high-temperature flue gas producing is because severe is light, the gap of the effect that is subject to heat buoyancy between kiln car both sides and kiln wall flows to kiln car top, under the effect of the first chimney 1 draft, flow downward, by the gap between base substrate, at the bottom of kiln, inhale fire hole and enter the first kiln bottom flue 6, first flue 5 of flowing through, is finally discharged by the first chimney 1; At low thermophase, by combustion product in kiln, in convection heat transfer' heat-transfer by convection mode, conduct heat to kiln car, then pass to base substrate with radiation mode, make base substrate preheating; Hot stage conducts heat to kiln car by radiation mode, then conducts heat to base substrate with radiation mode, thereby makes base substrate calcining; Because hot-air is low to kiln from the refluence of kiln top in kiln, according to vertical direction air-flow rule, kiln temperature distribution can reach evenly automatically, and therefore quality of item is more stable;
When burning till, after end, start to enter cooling stage, closing the fuel of first domestic ceramics oxygen-enriched combusting shuttle kiln supplies with and oxygen increasing equipment, wherein, fuel-supplying unit comprises: fuels sources, conveyance conduit (the first natural gas line 9), flowmeter, stop valve, magnetic valve; Oxygen increasing equipment comprises: source of oxygen, conveyance conduit (the first oxygenation pipeline 10), flowmeter, stop valve, magnetic valve, the first oxygen-enriched combusting control system 7 comprises: ratio adjusting valve, misfire detection and the automatic ignition device of oxygen-enriched air and fuel, tempering protection device.Close the first smoke exhaust fan 3 and the first adjusting flashboard 4, the while is opened the 4th adjusting flashboard 25, the second smoke exhaust fan 26, the 5th adjusting flashboard 15 and the 3rd adjusting flashboard 19, the second adjusting flashboards 14 successively and the 6th adjusting flashboard 20 is now closed condition; In first domestic ceramics oxygen-enriched combusting shuttle kiln, high temperature air is under the effect of the second smoke exhaust fan 26, by the first kiln bottom flue 6, the 5th, regulate flashboard 15 connecting pipe 17 of flowing through, enter the second hot blast main pipe road 18 of second domestic ceramics oxygen-enriched combusting shuttle kiln, finally by the second hot blast lateral 21, imported in second domestic ceramics oxygen-enriched combusting shuttle kiln, the base substrate of piling up district 22 to being placed on goods in the second kiln carries out preheating; When base substrate is preheating to more than 300 ℃, close the 3rd and regulate flashboard 19, disconnect being connected of second domestic ceramics oxygen-enriched combusting shuttle kiln and first domestic ceramics oxygen-enriched combusting shuttle kiln, open the second oxygen-enriched combusting control system 29 igniting simultaneously, the base substrate in second domestic ceramics oxygen-enriched combusting shuttle kiln is calcined; Meanwhile open the first adjusting flashboard 4, open the first smoke exhaust fan 3, continuation is carried out cooling to ceramic in first domestic ceramics oxygen-enriched combusting shuttle kiln, until kiln discharge temperature can be closed the first smoke exhaust fan 3, the goods that bake are taken out in kiln car, reinstall new base substrate; The high temperature air of second natural gas oxygen-enriched burning generation of domestic ceramics oxygen-enriched combusting shuttle kiln flows downward under the effect of the second chimney 28 drafts, by the gap between base substrate, at the bottom of kiln, inhale fire hole and enter the second kiln bottom flue 23, second flue 24 of flowing through, is finally discharged by the second chimney 28; When burning till, after end, enter cooling stage, closing the fuel of second domestic ceramics oxygen-enriched combusting shuttle kiln supplies with and oxygen increasing equipment, wherein, fuel-supplying unit comprises: fuels sources, conveyance conduit (the second natural gas line 31), flowmeter, stop valve, magnetic valve; Oxygen increasing equipment comprises: source of oxygen, conveyance conduit (the second oxygenation pipeline 32), flowmeter, stop valve, magnetic valve, the second oxygen-enriched combusting control system 29 comprises: ratio adjusting valve, misfire detection and the automatic ignition device of oxygen-enriched air and fuel, tempering protection device.Close the second smoke exhaust fan 26 and the 4th adjusting flashboard 25, the while is opened the first smoke exhaust fan 3, the first adjusting flashboard 4, the second adjusting flashboard 14 and the 6th adjusting flashboard 20, the three adjusting flashboards 19 successively and the 5th adjusting flashboard 15 is now closed condition; Utilize second high temperature air in domestic ceramics oxygen-enriched combusting shuttle kiln to start new base substrate in first domestic ceramics oxygen-enriched combusting shuttle kiln to carry out preheating, move in circles thus.
The course of work at the domestic ceramics oxygen-enriched combusting shuttle kiln of single seat is: 1. will install the kiln car of domestic ceramics, push shuttle kiln and shut wicket; 2. opened smoke-discharging blower fan; 3. open combustion fan and oxygen increasing equipment, make the O in combustion-supporting medium
2content reaches 24%～32%(v%); 4. open fuel supply and combustion apparatus igniting, the ratio that passing ratio regulation and control system and actuator are realized fuel and combustion-supporting medium regulates; 5. according to the temperature schedule curve setting in product sintering process, realize burning till of domestic ceramics, the firing temperature of domestic ceramics generally can be higher than 1200 ℃ (firing temperature be at 1100～1300 ℃); 6. when the burning till after end of domestic ceramics, close fuel and supply with and oxygen increasing equipment; 7. keep smoke exhaust fan and combustion fan to continue to open, until kiln temperature reaches kiln discharge temperature, can close smoke exhaust fan and combustion fan.The time that domestic ceramics shuttle kiln is reduced to kiln discharge temperature by firing temperature needs 5～12 hours; 8. kiln car kiln discharge, unloads.
In the cooling down stage of oxygen-enriched combusting domestic ceramics shuttle kiln, in kiln, there is a large amount of hot gas higher than 400～500 ℃ to discharge from its inner exchanging thus.The synthesis energy saving that the utilization of this part hot gas is burnt till the system of domestic ceramics to shuttle kiln has very large effect, and how rationally to utilize is key problem in technology of the present invention.
Key problem in technology of the present invention is by two oxygen-enriched combusting domestic ceramics shuttle kilns independently, by the smoke-exhaust pipeline system that can control, couples together.Arrange respectively the firing time of two kilns properly, the intensification that A kiln (oxygen-enriched combusting domestic ceramics shuttle kiln A) is opened B kiln (oxygen-enriched combusting domestic ceramics shuttle kiln B) after burning till and finishing, i.e. temperature-fall period after A klining becomes to finish, hot gas is wherein passed through to smoke evacuation system, join in B kiln, for the ceramic product of preheating, heating B kiln.When the ceramic product in B kiln rises to more than 300 ℃, open the combustion system on B kiln, product is heated with flame, until burn till end.By that analogy, when B kiln is lowered the temperature, can by hot gas suction A kiln wherein for preheating product wherein.Move in circles thus, in whole system, can realize synthesis energy saving more than 10%.
Two oxygen-enriched combusting domestic ceramics shuttle kilns that are connected by smoke evacuation system are set, UTILIZATION OF VESIDUAL HEAT IN source each other, and the product heating of burning till warm-up phase for the other side in this system.
The present invention compared with prior art, has advantages of following main:
Compared with the shuttle kiln of the present invention and isolated operation, the method has the hot gas making full use of in domestic ceramics oxygen-enriched combusting shuttle kiln cooling stage kiln.In whole system, can realize synthesis energy saving more than 10%, and have the effect of reduction of discharging, whole system is stable, and efficiency is high.
Accompanying drawing explanation
Fig. 1 is the System Working Principle schematic diagram of domestic ceramics oxygen-enriched combusting shuttle kiln of the present invention.
In figure: 1. the first chimney; 2. first row smoke pipe; 3. the first smoke exhaust fan; 4. first regulate flashboard; 5. the first flue; 6. the first kiln bottom flue; 7. the first oxygen-enriched combusting control system; 8. the first combustion air pipeline; 9. the first natural gas line; 10. the first oxygenation pipeline; 11. first oxygen-enriched burners; 12. first hot blast laterals; 13. first hot air ducts; 14. second regulate flashboard; 15. the 5th regulate flashboard; In 16. first kilns, goods are piled up district; 17. connect flue; 18. second hot air ducts; 19. the 3rd regulate flashboard; 20. the 6th regulate flashboard; 21. second hot blast laterals; In 22. second kilns, goods are piled up district; 23. second kiln bottom flues; 24. second flues; 25. the 4th regulate flashboard; 26. second smoke exhaust fans; 27. second row smoke pipes; 28. second chimneys; 29. second oxygen-enriched combusting control systems; 30. second combustion air pipelines; 31. second natural gas lines; 32. second oxygenation pipelines; 33. second oxygen-enriched burners.
The specific embodiment
A kind of energy saving of system method of domestic ceramics oxygen-enriched combusting shuttle kiln, two the domestic ceramics oxygen-enriched combusting shuttle kilns (or claiming: oxygen-enriched combusting domestic ceramics shuttle kiln) that are connected by UTILIZATION OF VESIDUAL HEAT IN pipe-line system form the system of domestic ceramics oxygen-enriched combusting shuttle kiln, control respectively the unlatching period of two domestic ceramics oxygen-enriched combusting shuttle kilns, the interior hot gas suction of domestic ceramics oxygen-enriched combusting shuttle kiln (as A kiln) of burning till cooling stage is burnt till in the domestic ceramics oxygen-enriched combusting shuttle kiln (as B kiln) of warm-up phase, it is not being put under the condition of burner use fuel heating, the product burning till in the domestic ceramics oxygen-enriched combusting shuttle kiln of warm-up phase is preheating to 200～400 ℃, realize the energy-conservation of whole system.
The system of described domestic ceramics oxygen-enriched combusting shuttle kiln comprises first domestic ceramics oxygen-enriched combusting shuttle kiln (A kiln), second domestic ceramics oxygen-enriched combusting shuttle kiln (B kiln) and the UTILIZATION OF VESIDUAL HEAT IN pipe-line system that is connected two kilns, first domestic ceramics oxygen-enriched combusting shuttle kiln comprises the first chimney 1, first row smoke pipe 2, the first smoke exhaust fan 3, first regulates flashboard 4, the first flue 5, the first kiln bottom flue 6, the first combustion air pipeline 8, the first natural gas line 9, the first oxygenation pipeline 10, the first oxygen-enriched burner 11, the first kiln body, the first kiln body is provided with wicket, in the first kiln body, be that in the first kiln, goods are piled up district 16, the first kiln bottom flue 6 of the bottom of the first kiln body is connected with the first flue 5, the first flue 5 is connected with first row smoke pipe 2, first row smoke pipe 2 is provided with the first smoke exhaust fan 3, first regulates flashboard 4, first row smoke pipe 2 is connected with the first chimney 1, the first combustion air pipeline 8, the first natural gas line 9, the first oxygenation pipeline 10 is all connected with the first oxygen-enriched burner 11, the first oxygen-enriched burner 11 is arranged on the first kiln body,
Second domestic ceramics oxygen-enriched combusting shuttle kiln (B kiln) comprises the second kiln bottom flue 23, the second flue 24, the 4th regulates flashboard 25, the second smoke exhaust fan 26, second row smoke pipe 27, the second chimney 28, the second combustion air pipeline 30, the second natural gas line 31, the second oxygenation pipeline 32, the second oxygen-enriched burner 33, the second kiln body, the second kiln body is provided with wicket, in the second kiln body, be that in the second kiln, goods are piled up district 22, the second kiln bottom flue 23 of the bottom of the second kiln body is connected with the second flue 24, the second flue 24 is connected with second row smoke pipe 27, second row smoke pipe 27 is provided with the 4th and regulates flashboard 25, the second smoke exhaust fan 26, second row smoke pipe 27 is connected with the second chimney 28, the second combustion air pipeline 30, the second natural gas line 31, the second oxygenation pipeline 32 is all connected with the second oxygen-enriched burner 33, the second oxygen-enriched burner 33 is arranged on the second kiln body,
The UTILIZATION OF VESIDUAL HEAT IN pipe-line system that connects two kilns comprises that the first hot blast lateral 12, the first hot air duct 13, the second adjusting flashboard 14, the second hot air duct 18, the 3rd adjusting flashboard 19, the second hot blast lateral 21, the 5th adjusting flashboard 15, the 6th regulate flashboard 20, connect flue 17; The first hot blast lateral 12 at the top of the first kiln body is connected with the first hot air duct 13, and the first hot air duct 13 is provided with the second adjusting flashboard 14, the first hot air ducts 13 and is connected with the first flue 5; The second hot blast lateral 21 at the top of the second kiln body is connected with the second hot air duct 18, and the second hot air duct 18 is provided with the 3rd and regulates flashboard 19, the second hot air ducts 18 to be connected with the second flue 24; The one end that connects flue 17 is connected with the first flue 5, and the other end that connects flue 17 is connected with the second flue 24, and the 5th regulates flashboard 15 to be arranged on the first flue 5, and the 6th regulates flashboard 20 to be arranged on the second flue 24.
Referring to Fig. 1, concrete grammar is: domestic ceramics base substrate is put into the first kiln goods and pile up district 16, shut wicket; Open first and regulate flashboard 4 that each flue in A kiln is circulated mutually, then open the first smoke exhaust fan 3 and the first oxygen-enriched combusting control system 7; After oxygen-enriched air and natural gas mix, start igniting calcining.Natural gas burns by the first oxygen-enriched burner 11, the high temperature air producing is because severe is light, the gap of the effect that is subject to heat buoyancy between kiln car both sides and kiln wall flows to kiln car top, under the effect of the first chimney 1 draft, flow downward, by the gap between base substrate, at the bottom of kiln, inhale fire hole and enter the first kiln bottom flue 6, first flue 5 of flowing through, is finally discharged by the first chimney 1.At low thermophase, mainly by combustion product in kiln, in convection heat transfer' heat-transfer by convection mode, conduct heat to kiln car, then pass to base substrate with radiation mode, make base substrate preheating; Hot stage mainly conducts heat to kiln car by radiation mode, then conducts heat to base substrate with radiation mode, thereby makes base substrate calcining.Because hot-air is low to kiln from the refluence of kiln top in kiln, according to vertical direction air-flow rule, kiln temperature distribution can reach evenly automatically, and therefore quality of item is more stable.
When burning till, after end, start to enter cooling stage, closing A kiln fuel supplies with and oxygen increasing equipment, close the first smoke exhaust fan 3 and first and regulate flashboard 4, while is opened the 4th adjusting flashboard 25, the second smoke exhaust fan 26, the 5th adjusting flashboard 15 and the 3rd adjusting flashboard 19, the second adjusting flashboards 14 successively and the 6th adjusting flashboard 20 is now closed condition.In A kiln, high temperature air is under the effect of the second smoke exhaust fan 26, by the first kiln bottom flue 6, the 5th, regulate flashboard 15 connecting pipe 17 of flowing through, enter the second hot blast main pipe road 18 of B kiln, finally by the second hot blast lateral 21, imported in B kiln, the base substrate of piling up district 22 to being placed on goods in the second kiln carries out preheating.When base substrate is preheating to more than 300 ℃, to close the 3rd and regulate flashboard 19, disconnection B kiln is connected with A kiln, opens the second oxygen-enriched combusting control system 29 igniting simultaneously, and the base substrate in B kiln is calcined; Meanwhile open the first adjusting flashboard 4, open the first smoke exhaust fan 3, continuation is carried out cooling to ceramic in A kiln, until kiln discharge temperature can be closed the first smoke exhaust fan 3, the goods that bake are taken out in kiln car, reinstalls new base substrate.The high temperature air that the natural gas oxygen-enriched burning of B kiln produces flows downward under the effect of the second chimney 28 drafts, by the gap between base substrate, inhales fire hole and enter the second kiln bottom flue 23 at the bottom of kiln, and second flue 24 of flowing through, is finally discharged by the second chimney 28.When burning till, after end, enter cooling stage, closing B kiln fuel supplies with and oxygen increasing equipment, close the second smoke exhaust fan 26 and the 4th and regulate flashboard 25, while is opened the first smoke exhaust fan 3, the first adjusting flashboard 4, the second adjusting flashboard 14 and the 6th adjusting flashboard 20, the three adjusting flashboards 19 successively and the 5th adjusting flashboard 15 is now closed condition; Utilize the high temperature air in B kiln to start new base substrate in A kiln to carry out preheating, move in circles thus.
The first oxygen-enriched combusting control system 7 of described A kiln comprises three passages, and first passage is the first combustion air passage 8, and second channel is the first natural gas passage 9, and third channel is the first oxygenation path 10.Combustion air, natural gas and the oxygen of drawing from three passages is at the first oxygen-enriched burner 11 mixed combining combustion mutually.Equally, the second oxygen-enriched combusting control system 29 of B kiln comprises three passages (the second combustion air passage 30, the second natural gas passage 31 and the second oxygenation passage 32), and combustion air, natural gas and oxygen mix combining combustion mutually at the second oxygen-enriched burner 33 places.Whole system realizes temperature by three above-mentioned passages and regulates, and guarantees the stable of the interior firing temperature of furnace.
The smoke-exhaust pipeline system (being smoke evacuation system) of A kiln of the present invention is comprised of the first flue 5, the first kiln bottom flue 6, the first smoke exhaust fan 3, first row smoke pipe 2 and the first chimney 1, in the situation that the first adjusting flashboard 4 is opened, the high temperature air that fuel combustion produces enters main smoke discharging pipe through kiln bottom flue, the smoke exhaust pipe of flowing through under the effect of the first smoke exhaust fan, is finally discharged by the first chimney.Equally, the smoke-exhaust pipeline system of B kiln (being smoke evacuation system) is comprised of the second flue 24, the second kiln bottom flue 23, the second smoke exhaust fan 26 second, smoke exhaust pipe 27 and the second chimney 28.
Exhaust heat utilization system of the present invention is put A, two shuttle kilns of B together side by side, by the time difference of burning till, makes them mutually utilize waste gas residual heat to carry out waste heat ceramic body.The high temperature air that specifically A klining produces after becoming flows into the first hot air duct 13 by the first hot blast lateral 12, flow through and connect flue (connecting pipe) 17, the second hot air duct 18 that enters B kiln, is finally imported in B kiln base substrate preheating by the second hot blast lateral 21.Equally, the high temperature air producing after B klining becomes flows into the second hot air duct 18 by the second hot blast lateral 21, flow through and connect flue (connecting pipe), enter the first hot air duct 13 of A kiln, finally by the first hot blast lateral 12, import preheating base substrate in A kiln.Move in circles thus, thereby reach the object that waste gas residual heat recycles.
Below in conjunction with in conjunction with specific embodiments foregoing being described further.
Application Example 1:
The first, pack drinking utensils even green body into kiln car, then kiln car is pushed to A kiln and shuts wicket.Opened smoke-discharging blower fan, combustion fan and oxygen increasing equipment, make O in combustion air
2content reaches 27%(v%).
The second, open natural gas supply and combustion apparatus igniting, first with the heating rate of 8～10 ℃/min, temperature is risen to 1000 ℃, insulation a period of time makes that kiln temperature is poor to be reduced, and finally with the heating rate of 5～8 ℃/min, rises to 1280 ℃ drinking utensils base substrate is calcined.
Three, A kiln drinking utensils base substrate burns till after end, closes its oxygen-enriched combusting control system and smoke evacuation system, opens B kiln smoke evacuation system simultaneously, the high temperature air that utilizes A kiln to produce carries out preheating to B kiln base substrate, when preheat temperature reaches 350 ℃, stop preheating, close the connecting path between two kilns.Open B kiln combustion apparatus (combustion system) base substrate is calcined, open A kiln smoke evacuation system simultaneously and continue refrigerated product, thereby obtain drinking utensils product.Move in circles thus, utilize waste gas residual heat preheating base substrate to reach the energy-conservation of whole system, realize synthesis energy saving 11%.
Application Example 2:
The first, pack ceramic tea-pot even green body into kiln car, then kiln car is pushed to B kiln and shuts wicket.Opened smoke-discharging blower fan, combustion fan and oxygen increasing equipment, make O in combustion air
2content reaches 25%(v%).
The second, open that natural gas is supplied with and combustion apparatus igniting, first with the heating rate of 8～10 ℃/min, temperature is risen to 850 ℃, make that kiln temperature is poor to be reduced insulation a period of time, finally with the heating rate of 5～8 ℃/min, rise to 1150 ℃ base substrate is calcined.
Three, B kiln ceramic tea-pot base substrate burns till after end, closes its oxygen-enriched combusting control system and smoke evacuation system, opens A kiln smoke evacuation system simultaneously, the high temperature air that utilizes B kiln to produce carries out preheating to A kiln base substrate, when preheat temperature reaches 290 ℃, stop preheating, close the connecting path between two kilns.Open A kiln combustion system base substrate is calcined, open B kiln smoke evacuation system simultaneously and continue refrigerated product, thereby obtain ceramic tea-pot product.Move in circles thus, utilize waste gas residual heat preheating base substrate to reach the energy-conservation of whole system, realize synthesis energy saving 10%.
Claims (3)
1. the energy saving of system method of a domestic ceramics oxygen-enriched combusting shuttle kiln, it is characterized in that: two domestic ceramics oxygen-enriched combusting shuttle kilns that are connected by UTILIZATION OF VESIDUAL HEAT IN pipe-line system form the system of domestic ceramics oxygen-enriched combusting shuttle kiln, control respectively the unlatching period of two domestic ceramics oxygen-enriched combusting shuttle kilns, the hot gas suction of burning till in the domestic ceramics oxygen-enriched combusting shuttle kiln of cooling stage is burnt till in the domestic ceramics oxygen-enriched combusting shuttle kiln of warm-up phase, it is not being put under the condition of burner use fuel heating, the product burning till in the domestic ceramics oxygen-enriched combusting shuttle kiln of warm-up phase is preheating to 200～400 ℃, realize the energy-conservation of whole system.
2. the energy saving of system method of a kind of domestic ceramics oxygen-enriched combusting shuttle kiln according to claim 1, is characterized in that: the system of described domestic ceramics oxygen-enriched combusting shuttle kiln comprises first domestic ceramics oxygen-enriched combusting shuttle kiln, second domestic ceramics oxygen-enriched combusting shuttle kiln and the UTILIZATION OF VESIDUAL HEAT IN pipe-line system that is connected two kilns, first domestic ceramics oxygen-enriched combusting shuttle kiln comprises the first chimney (1), first row smoke pipe (2), the first smoke exhaust fan (3), first regulates flashboard (4), the first flue (5), the first kiln bottom flue (6), the first combustion air pipeline (8), the first natural gas line (9), the first oxygenation pipeline (10), the first oxygen-enriched burner (11), the first kiln body, the first kiln body is provided with wicket, in the first kiln body, be that in the first kiln, goods are piled up district (16), the first kiln bottom flue (6) of the bottom of the first kiln body is connected with the first flue (5), the first flue (5) is connected with first row smoke pipe (2), and first row smoke pipe (2) is provided with the first smoke exhaust fan (3), first regulates flashboard (4), and first row smoke pipe (2) is connected with the first chimney (1), the first combustion air pipeline (8), the first natural gas line (9), the first oxygenation pipeline (10) is all connected with the first oxygen-enriched burner (11), and the first oxygen-enriched burner (11) is arranged on the first kiln body,
Second domestic ceramics oxygen-enriched combusting shuttle kiln comprises the second kiln bottom flue (23), the second flue (24), the 4th regulates flashboard (25), the second smoke exhaust fan (26), second row smoke pipe (27), the second chimney (28), the second combustion air pipeline (30), the second natural gas line (31), the second oxygenation pipeline (32), the second oxygen-enriched burner (33), the second kiln body, the second kiln body is provided with wicket, in the second kiln body, be that in the second kiln, goods are piled up district (22), the second kiln bottom flue (23) of the bottom of the second kiln body is connected with the second flue (24), the second flue (24) is connected with second row smoke pipe (27), and second row smoke pipe (27) is provided with the 4th and regulates flashboard (25), the second smoke exhaust fan (26), second row smoke pipe (27) is connected with the second chimney (28), the second combustion air pipeline (30), the second natural gas line (31), the second oxygenation pipeline (32) is all connected with the second oxygen-enriched burner (33), and the second oxygen-enriched burner (33) is arranged on the second kiln body,
The UTILIZATION OF VESIDUAL HEAT IN pipe-line system that connects two kilns comprises that the first hot blast lateral (12), the first hot air duct (13), second regulate flashboard (14), the second hot air duct (18), the 3rd to regulate flashboard (19), the second hot blast lateral (21), the 5th to regulate flashboard (15), the 6th to regulate flashboard (20), connect flue (17); The first hot blast lateral (12) at the top of the first kiln body is connected with the first hot air duct (13), the first hot air duct (13) is provided with the second adjusting flashboard (14), and the first hot air duct (13) is connected with the first flue (5); The second hot blast lateral (21) at the top of the second kiln body is connected with the second hot air duct (18), the second hot air duct (18) is provided with the 3rd and regulates flashboard (19), and the second hot air duct (18) is connected with the second flue (24); The one end that connects flue (17) is connected with the first flue (5), the other end that connects flue (17) is connected with the second flue (24), the 5th regulates flashboard (15) to be arranged on the first flue (5) above, and the 6th regulates flashboard (20) to be arranged on the second flue (24).
3. the energy saving of system method of a kind of domestic ceramics oxygen-enriched combusting shuttle kiln according to claim 1, it is characterized in that: concrete grammar is: the first kiln goods of domestic ceramics base substrate being put into first domestic ceramics oxygen-enriched combusting shuttle kiln are piled up district (16), shut wicket; Open first and regulate flashboard (4), then open the first smoke exhaust fan (3) and the first oxygen-enriched combusting control system (7); After oxygen-enriched air and natural gas mix, start igniting calcining; Natural gas is by the first oxygen-enriched burner (11) burning, the high-temperature flue gas producing is because severe is light, the gap of the effect that is subject to heat buoyancy between kiln car both sides and kiln wall flows to kiln car top, under the effect of the first chimney (1) draft, flow downward, by the gap between base substrate, at the bottom of kiln, inhale fire hole and enter the first kiln bottom flue (6), the first flue (5) of flowing through, is finally discharged by the first chimney (1); At low thermophase, by combustion product in kiln, in convection heat transfer' heat-transfer by convection mode, conduct heat to kiln car, then pass to base substrate with radiation mode, make base substrate preheating; Hot stage conducts heat to kiln car by radiation mode, then conducts heat to base substrate with radiation mode, thereby makes base substrate calcining; Because hot flue gas is low to kiln from the refluence of kiln top in kiln, according to vertical direction air-flow rule, kiln temperature distribution can reach evenly automatically, and therefore quality of item is more stable;
When burning till, after end, start to enter cooling stage, closing the fuel of first domestic ceramics oxygen-enriched combusting shuttle kiln supplies with and oxygen increasing equipment, close the first smoke exhaust fan (3), first and regulate flashboard (4), open successively the 4th and regulate flashboard (25), the second smoke exhaust fan (26), the 5th to regulate flashboard (15) and the 3rd to regulate flashboard (19), it is now closed condition that the second adjusting flashboard (14) and the 6th regulates flashboard (20) simultaneously; In first domestic ceramics oxygen-enriched combusting shuttle kiln, high temperature air is under the effect of the second smoke exhaust fan (26), by the first kiln bottom flue (6), the 5th, regulate flashboard (15) connecting pipe (17) of flowing through, enter the second hot blast main pipe road (18) of second domestic ceramics oxygen-enriched combusting shuttle kiln, finally by the second hot blast lateral (21), imported in second domestic ceramics oxygen-enriched combusting shuttle kiln, the base substrate of piling up district (22) to being placed on goods in the second kiln carries out preheating; When base substrate is preheating to more than 300 ℃, close the 3rd and regulate flashboard (19), disconnect being connected of second domestic ceramics oxygen-enriched combusting shuttle kiln and first domestic ceramics oxygen-enriched combusting shuttle kiln, open the second oxygen-enriched combusting control system (29) igniting simultaneously, the base substrate in second domestic ceramics oxygen-enriched combusting shuttle kiln is calcined; Meanwhile open the first adjusting flashboard (4), open the first smoke exhaust fan (3), continuation is carried out cooling to ceramic in first domestic ceramics oxygen-enriched combusting shuttle kiln, until kiln discharge temperature can be closed the first smoke exhaust fan (3), the goods that bake are taken out in kiln car, reinstall new base substrate; The high temperature air of second natural gas oxygen-enriched burning generation of domestic ceramics oxygen-enriched combusting shuttle kiln flows downward under the effect of the second chimney (28) draft, by the gap between base substrate, at the bottom of kiln, inhale fire hole and enter the second kiln bottom flue (23), the second flue (24) of flowing through, is finally discharged by the second chimney (28); When burning till, after end, enter cooling stage, closing the fuel of second domestic ceramics oxygen-enriched combusting shuttle kiln supplies with and oxygen increasing equipment, close the second smoke exhaust fan (26) and the 4th and regulate flashboard (25), open successively the first smoke exhaust fan (3), first and regulate flashboard (4), second to regulate flashboard (14) and the 6th to regulate flashboard (20), it is now closed condition that the 3rd adjusting flashboard (19) and the 5th regulates flashboard (15) simultaneously; Utilize second high temperature air in domestic ceramics oxygen-enriched combusting shuttle kiln to start new base substrate in first domestic ceramics oxygen-enriched combusting shuttle kiln to carry out preheating, move in circles thus.
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| CN105627741A (en) * | 2016-03-21 | 2016-06-01 | 周志彬 | Direct conduction energy-saving and environment-friendly nitridation kiln |
| CN107328208A (en) * | 2017-08-29 | 2017-11-07 | 广西容县顺垚仿古建陶有限公司 | A kind of brick blank drying equipment of ancient architecture blue bricks |
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| CN113754246A (en) * | 2021-09-07 | 2021-12-07 | 河南旭阳光电科技有限公司 | Oxygen-enriched combustion control system and control method for glass kiln |
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