CN102583464A - Rotary kiln gas-distribution and cooling system - Google Patents
Rotary kiln gas-distribution and cooling system Download PDFInfo
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- CN102583464A CN102583464A CN2012100254028A CN201210025402A CN102583464A CN 102583464 A CN102583464 A CN 102583464A CN 2012100254028 A CN2012100254028 A CN 2012100254028A CN 201210025402 A CN201210025402 A CN 201210025402A CN 102583464 A CN102583464 A CN 102583464A
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- rotary kiln
- kiln
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Abstract
A rotary kiln gas-distribution and cooling system comprises a rotary kiln barrel, a kiln head and a kiln tail. A fireproof layer is arranged in the rotary kiln barrel, and a cooling water jacket is arranged between the rotary kiln barrel and the fireproof layer, comprises a main cavity, a water inlet pipe and a water outlet pipe and further comprises a gas transmission device. The gas transmission device comprises a gas transmission main pipe, a gas transmission branch pipe and a gas outlet spray head. The rotary kiln gas-distribution and cooling system has the advantages that the cooling water jacket is additionally arranged, the fireproof layer is cooled, the replacing times of the fireproof layer is reduced, the cost is reduced, corrosion of the rotary kiln barrel and particularly corrosion of the kiln head is avoided, and the service lives of the rotary kiln barrel and the kiln head are prolonged; burr is additionally arranged at the position of the rotary kiln head, the fireproof layer is covered on the burr, and the damage to the kiln head caused by a high-temperature material is effectively avoided; when the material is located on the lower portion of the rotary kiln barrel, additional hydrogen passes through a gas distribution plate, the gas transmission main pipe and the gas transmission branch pipe and is ejected out of the gas outlet spray head so as to blow and dispel the material, and accordingly the material undergoes reaction and reduction fully; and the hydrogen is combustion-supporting, the reduction temperature is further improved, the reduction efficiency is improved, and the reaction time is shortened.
Description
Technical field
The invention belongs to metallurgical technology field, be specifically related to a kind of rotary kiln distribution and cooling system.
Background technology
In the production of metallurgy industry, chemical industry inorganic salt industry, cement building material industry, all can use rotary kiln.In smelting process; Because the temperature in the cylinder of rotary kiln is up to thousands of degree even higher; And production process need keep continuous regime, so although the cylinder of rotary kiln inwall is provided with flame retardant coating, under the effects such as heat erosion that the high-temperature material in cylinder of rotary kiln continues and acid and alkali corrosion; Still can make flame retardant coating and cylinder of rotary kiln constantly encroached on and cause its damage, need correspondingly change after using certain hour.Simultaneously, cause the loss of a large amount of heat energy.Especially the discharge port place of rotary kiln end is because of heat erosion and the acid and alkali corrosion that directly suffers high-temperature material, so damaged through regular meeting and influence production.Like this, carry out the replacing of flame retardant coating, not only will delay the duration, influence production efficiency, and increase huge production cost; And then say it, if the cylinder of rotary kiln sustain damage, that just will further strengthen production cost, reduce working efficiency.And the great amount of heat energy loss causes energy dissipation.
Bauxite extracts in the process of aluminum oxide, produces a large amount of red muds; In the red soil nickel ore wet method leaching process, produced a large amount of acid sludges, caused the pollution of environment and the waste of resource.In the bauxite alkali sintering process,, make reaction not go on, thereby caused the leaching rate of alumina reduction because high temperature reduction has caused the alkali evaporation; When using kiln process to carry out iron oxide reduction, because low temperature just causes the reduction ratio of red stone not enough; Under the condition that sodium exists, the speeding up of hydrogen reducing red stone, thus realize low-temperature reduction, reduction ratio is higher than other reductive agent.Simultaneously avoid the alkali evaporation effectively, made reaction normally carry out, improved the yield of aluminum oxide, improved the reduction ratio of red stone simultaneously.Particularly to needle-like ferro-aluminum ore deposit, present Bayer process, sintering process etc. can't realize.
Summary of the invention
The technical problem that the present invention will solve is: overcome the deficiency of prior art, a kind of rotary kiln distribution and cooling system are provided, it can effectively reduce the temperature of cylinder of rotary kiln and flame retardant coating, prolongs its work-ing life, thereby has reduced production cost; Realize low-temperature reduction, improve aluminum oxide yield and iron oxide reduction rate.
The technical solution adopted for the present invention to solve the technical problems is: a kind of rotary kiln distribution and cooling system; Comprise cylinder of rotary kiln, kiln hood and kiln tail; Be provided with flame retardant coating in the said cylinder of rotary kiln, it is characterized in that: between said cylinder of rotary kiln and said flame retardant coating, a watercooling jacket is set; Also comprise an air delivery device, the shower nozzle of giving vent to anger of said air delivery device is arranged in the cylinder of rotary kiln.
Preferably, said watercooling jacket comprises main cavity, inhalent siphon and rising pipe, and the water outlet that the feed-water end of said inhalent siphon and is gone into the supply mains is connected, and its water side is communicated with the main cavity of watercooling jacket; The feed-water end of said rising pipe is arranged in the main cavity of watercooling jacket, and its water side passes to cylinder of rotary kiln outside by the main cavity of watercooling jacket;
The said supply mains's of going into water-in connects a swivel joint, and its water outlet is arranged at the centre of cylinder of rotary kiln.
Preferably, said air delivery device comprises that also a gas transmission main, a gas transmission be in charge of, and said gas transmission main one end is in charge of with said gas transmission in the centre of said cylinder of rotary kiln and is communicated with, and the other end connects a gas distribution plate; Said gas transmission is in charge of that to be arranged in said flame retardant coating inner, with the said shower nozzle UNICOM of giving vent to anger.
Preferably, said inhalent siphon is arranged at the kiln tail or the kiln hood of said rotary kiln; Correspondingly, the feed-water end of said rising pipe is arranged at the kiln hood or the kiln tail of said rotary kiln.
Preferably, set firmly prickle, on said prickle, cover flame retardant coating at said kiln hood top.
Preferably, said rising pipe is more than one; Said inhalent siphon is more than one.
Preferably, the said shower nozzle of giving vent to anger is a Duckbill type, and its air outlet is towards kiln hood.
Preferably, said Duckbill type is given vent to anger shower nozzle by ceramic material.
Preferably, the said shower nozzle of giving vent to anger is arranged at apart from 10～50 meters of said kiln hood; It is more than one that said gas transmission is in charge of, and each root gas transmission is in charge of and is communicated with the plural shower nozzle of giving vent to anger.
Compared with prior art, the invention has the beneficial effects as follows:, both flame retardant coating was lowered the temperature owing between cylinder of rotary kiln and flame retardant coating, set up watercooling jacket; Reduce it and change number of times; Reduced cost, make again cylinder of rotary kiln especially kiln hood avoid corroding, prolonged its work-ing life; The discharge port place of rotary kiln end has set up prickle and has added and cover flame retardant coating, has effectively prevented the destruction of high-temperature material to kiln hood.Watercooling jacket has absorbed a large amount of heat energy, has effectively improved the heat energy utilization rate; When material is in the cylinder of rotary kiln bottom; The air delivery device of setting up is in charge of added hydrogen through gas distribution plate, gas transmission main, gas transmission, from the shower nozzle of giving vent to anger, spray, and the hydrogen of ejection can blow afloat material, dispel; Make the material gas-solid reaction normally to carry out, reduce more abundant; And hydrogen has improved reduction efficiency, has shortened the reaction times.
Description of drawings
Fig. 1 is the structure sectional view of the embodiment of the invention one;
Fig. 2 is the left view of Fig. 1.
Be labeled as among the figure:
1, cylinder of rotary kiln; 2, kiln hood; 3, kiln tail; 4, flame retardant coating; 51, gas transmission main; 52, gas transmission is in charge of; 53, the shower nozzle of giving vent to anger; 6, gas distribution plate; 71, main cavity; 72, inhalent siphon; 73, rising pipe; 74, go into the supply mains; 8, swivel joint; 9, prickle.
Embodiment
Below in conjunction with accompanying drawing embodiment, the present invention done further describing:
As shown in Figure 1, a kind of rotary kiln distribution and cooling system comprise cylinder of rotary kiln 1, kiln hood 2 and kiln tail 3, are provided with flame retardant coating 4 in the said cylinder of rotary kiln 1, between said cylinder of rotary kiln 1 and said flame retardant coating 4, watercooling jacket are set; Also comprise air delivery device, said air delivery device comprises that also gas transmission main 51, gas transmission are in charge of 52, the shower nozzle 53 of giving vent to anger, and the shower nozzle 53 of giving vent to anger of said air delivery device is arranged in the cylinder of rotary kiln 1; Said gas transmission main 51 1 ends are in charge of 52 in the centre of said cylinder of rotary kiln 1 with said gas transmission and are communicated with, and the other end connects a gas distribution plate 6; Said gas transmission is in charge of 52 and is arranged in said flame retardant coating 4 inside, with said shower nozzle 53 UNICOMs of giving vent to anger.
Said watercooling jacket comprises main cavity 71, inhalent siphon 72, rising pipe 73, goes into supply mains 74, and the feed-water end of said inhalent siphon 72 is connected with the water outlet of going into supply mains 74, and its water side is communicated with the main cavity 71 of watercooling jacket; The water-in of going into supply mains 74 connects swivel joint 8, and its water outlet is arranged at the centre of cylinder of rotary kiln 1; The feed-water end of said rising pipe 73 is arranged in the main cavity 71 of watercooling jacket, and its water side is passed to cylinder of rotary kiln 1 outside by the main cavity 71 of watercooling jacket;
Said inhalent siphon 72 is arranged at said kiln tail 3; Correspondingly, the feed-water end of said rising pipe 73 is arranged at said kiln hood 2; Kiln hood 2 tops set firmly prickle 9, on said prickle 9, cover flame retardant coating 4;
Said inhalent siphon 72 is more than one; Said rising pipe 73 is more than one; The said shower nozzle 53 of giving vent to anger is Duckbill type, and by ceramic material, its air outlet is towards kiln hood 2; The said shower nozzle 53 of giving vent to anger is arranged on and 10～50 meters of said kiln hood 2 distances; It is more than one that said gas transmission is in charge of 52, and each root gas transmission is in charge of 52 and is communicated with the plural shower nozzle 53 of giving vent to anger.
The main cavity 61 of watercooling jacket just is meant that part of watercooling jacket between kiln hood 2, kiln tail 3; Rotary kiln wall is provided with flame retardant coating 4 as the outer wall of watercooling jacket on the inwall of watercooling jacket.
Gas distribution plate 6 is by unit control, makes the shower nozzle 53 of giving vent to anger (shower nozzle 53 of giving vent to anger when promptly being in cylinder of rotary kiln 1 bottom) in " landfill " that is in material, just can ventilate and spray; Added hydrogen is in charge of 52 through gas distribution plate 6, gas transmission main 51, gas transmission, ejection from the shower nozzle 53 of giving vent to anger, and the hydrogen of ejection can blow afloat material, dispel.
The above only is preferred embodiment of the present invention, is not to be the restriction of the present invention being made other form, and any professional and technical personnel of being familiar with possibly utilize the technology contents of above-mentioned announcement to change or be modified as the equivalent embodiment of equivalent variations.But everyly do not break away from technical scheme content of the present invention, to any simple modification, equivalent variations and remodeling that above embodiment did, still belong to the protection domain of technical scheme of the present invention according to technical spirit of the present invention.
Claims (9)
1. rotary kiln distribution and cooling system comprise cylinder of rotary kiln, kiln hood and kiln tail, are provided with flame retardant coating in the said cylinder of rotary kiln, it is characterized in that: between said cylinder of rotary kiln and said flame retardant coating, a watercooling jacket is set; Also comprise an air delivery device, the shower nozzle of giving vent to anger of said air delivery device is arranged in the cylinder of rotary kiln.
2. rotary kiln distribution according to claim 1 and cooling system; It is characterized in that: said watercooling jacket comprises main cavity, inhalent siphon and rising pipe; The water outlet that the feed-water end of said inhalent siphon and is gone into the supply mains is connected, and its water side is communicated with the main cavity of watercooling jacket; The feed-water end of said rising pipe is arranged in the main cavity of watercooling jacket, and its water side passes to cylinder of rotary kiln outside by the main cavity of watercooling jacket;
The said supply mains's of going into water-in connects a swivel joint, and its water outlet is arranged at the centre of cylinder of rotary kiln.
3. rotary kiln distribution according to claim 2 and cooling system; It is characterized in that: said air delivery device comprises that also a gas transmission main, a gas transmission be in charge of; Said gas transmission main one end is in charge of with said gas transmission in the centre of said cylinder of rotary kiln and is communicated with, and the other end connects a gas distribution plate; Said gas transmission is in charge of that to be arranged in said flame retardant coating inner, with the said shower nozzle UNICOM of giving vent to anger.
4. rotary kiln distribution according to claim 3 and cooling system is characterized in that: said inhalent siphon is arranged at the kiln tail or the kiln hood of said rotary kiln; Correspondingly, the feed-water end of said rising pipe is arranged at the kiln hood or the kiln tail of said rotary kiln.
5. rotary kiln distribution according to claim 4 and cooling system is characterized in that: set firmly prickle at said kiln hood top, on said prickle, cover flame retardant coating.
6. according to arbitrary described rotary kiln distribution of claim 2 to 5 and cooling system, it is characterized in that: said rising pipe is more than one; Said inhalent siphon is more than one.
7. rotary kiln distribution according to claim 6 and cooling system is characterized in that: the said shower nozzle of giving vent to anger is a Duckbill type, and its air outlet is towards kiln hood.
8. rotary kiln distribution according to claim 7 and cooling system is characterized in that: said Duckbill type is given vent to anger shower nozzle by ceramic material.
9. rotary kiln distribution according to claim 8 and cooling system is characterized in that: the said shower nozzle of giving vent to anger is arranged at apart from 10～50 meters of said kiln hood; It is more than one that said gas transmission is in charge of, and each root gas transmission is in charge of and is communicated with the plural shower nozzle of giving vent to anger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100254028A CN102583464A (en) | 2012-01-21 | 2012-01-21 | Rotary kiln gas-distribution and cooling system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100254028A CN102583464A (en) | 2012-01-21 | 2012-01-21 | Rotary kiln gas-distribution and cooling system |
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| CN102583464A true CN102583464A (en) | 2012-07-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012100254028A Pending CN102583464A (en) | 2012-01-21 | 2012-01-21 | Rotary kiln gas-distribution and cooling system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106392095A (en) * | 2016-11-28 | 2017-02-15 | 攀枝花市仁通钒业有限公司 | Metal powder gas reduction equipment |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4462793A (en) * | 1981-08-03 | 1984-07-31 | Kawasaki Jukogyo Kabushiki Kaisha | Rotary kiln and method of using such a kiln |
| US5779468A (en) * | 1995-04-11 | 1998-07-14 | Bayer Aktiengesellschaft | Device for supplying gas to rotary kilns |
| CN2924446Y (en) * | 2006-07-19 | 2007-07-18 | 程志强 | Buried rotary kiln radical air supply device |
| CN101050859A (en) * | 2007-04-17 | 2007-10-10 | 史金麟 | Method for gasifying and burning domestic garbage |
| CN101118113A (en) * | 2007-09-07 | 2008-02-06 | 上海中加电炉有限公司 | Heated air circulation bake oven |
| CN101153770A (en) * | 2006-09-29 | 2008-04-02 | 黄石市建材节能设备总厂 | Under-layer air distributing rotary kiln |
| CN201288201Y (en) * | 2008-10-23 | 2009-08-12 | 胡长春 | Coal based ferrum redactum rotary kiln |
| CN201621949U (en) * | 2010-04-13 | 2010-11-03 | 伍震洲 | Externally-heated coal reducing rotary kiln |
| CN202440319U (en) * | 2012-01-21 | 2012-09-19 | 胡长春 | Gas distribution and cooling system of rotary kiln |
-
2012
- 2012-01-21 CN CN2012100254028A patent/CN102583464A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4462793A (en) * | 1981-08-03 | 1984-07-31 | Kawasaki Jukogyo Kabushiki Kaisha | Rotary kiln and method of using such a kiln |
| US5779468A (en) * | 1995-04-11 | 1998-07-14 | Bayer Aktiengesellschaft | Device for supplying gas to rotary kilns |
| CN2924446Y (en) * | 2006-07-19 | 2007-07-18 | 程志强 | Buried rotary kiln radical air supply device |
| CN101153770A (en) * | 2006-09-29 | 2008-04-02 | 黄石市建材节能设备总厂 | Under-layer air distributing rotary kiln |
| CN101050859A (en) * | 2007-04-17 | 2007-10-10 | 史金麟 | Method for gasifying and burning domestic garbage |
| CN101118113A (en) * | 2007-09-07 | 2008-02-06 | 上海中加电炉有限公司 | Heated air circulation bake oven |
| CN201288201Y (en) * | 2008-10-23 | 2009-08-12 | 胡长春 | Coal based ferrum redactum rotary kiln |
| CN201621949U (en) * | 2010-04-13 | 2010-11-03 | 伍震洲 | Externally-heated coal reducing rotary kiln |
| CN202440319U (en) * | 2012-01-21 | 2012-09-19 | 胡长春 | Gas distribution and cooling system of rotary kiln |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106392095A (en) * | 2016-11-28 | 2017-02-15 | 攀枝花市仁通钒业有限公司 | Metal powder gas reduction equipment |
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Application publication date: 20120718 |