CN102494348B - Energy-saving pulverized coal grinding and delivering equipment for boilers and kilns - Google Patents
Energy-saving pulverized coal grinding and delivering equipment for boilers and kilns Download PDFInfo
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- CN102494348B CN102494348B CN201110373274.1A CN201110373274A CN102494348B CN 102494348 B CN102494348 B CN 102494348B CN 201110373274 A CN201110373274 A CN 201110373274A CN 102494348 B CN102494348 B CN 102494348B
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Abstract
An environment-saving pulverized coal grinding and delivering equipment for boilers and kilns comprises a housing and a driving shaft, wherein the housing is mounted on a framework, and the driving shaft runs through the housing and is disposed on the framework. Besides, a driving wheel is arranged on the driving shaft, a feed hopper is arranged on the housing, and a primary grinding hammer, a secondary grinding hammer, a tertiary grinding hammer and an air delivery device are sequentially arranged on the driving shaft in the housing, a partition plate is arranged between the tertiary grinding hammer and the air delivery device, and a pulverized coal regrinding groove is arranged between the partition plate and the tertiary grinding hammer. The housing is further provided with a pulverized coal separating chamber with a coarse pulverized coal return pipe, and a coarse pulverized coal inlet is arranged between the coarse pulverized coal return pipe and the primary grinding hammer. The energy-saving pulverized coal grinding and delivering equipment for the boilers and the kilns has the advantages that heat loss due to insufficient burning of coal of the boilers and kilns is eliminated basically and emission of various pollutants is reduced greatly.
Description
Technical field
The present invention relates to a kind of pulverized coal grinding conveying device.
Background technology
Be boiler, in the equipment of furnace fuel processing, traditional blower mill structure is: in the scroll casing shape armor of mill separator bottom, one group of impeller and shock plate are only housed, when raw coal counts after blower mill, between the impeller of motor drive High Rotation Speed and shock plate, collide, coal is levigate, rely on the blast that impeller self produces to enter in stove through breeze airflow outlet, impeller should play the effect of coal-grinding, play again the effect that produces blast, so serious wear, service life is short, again owing to only having one-level impeller to pulverize processing to coal, so coal-grinding efficiency is low, quality of pc is also difficult to control.
Chinese patent ZL 200710109885.9 discloses a kind of centrifugal type composite coal-grinding and powder-spraying machine, it is provided with three groups of different fling rammers of diameter coal cinder is ground, but it can not further be processed for the coal dust that does not reach yet standard in process of lapping after three grades of fling rammers grind, so just may cause the coal dust after grinding still to have the inadequate problem of burning, reduce the service efficiency of coal dust.
Summary of the invention
The invention provides a kind of energy-saving pulverized coal grinding conveying device for boiler, kiln, this equipment can reduce or avoid problem noted earlier.
For addressing the above problem, the present invention proposes a kind of for boiler, the energy-saving pulverized coal grinding conveying device of kiln, it comprises rack-mounted casing, one runs through described casing and is arranged at the driving shaft in frame, on described driving shaft, be provided with driving wheel, on described casing, be provided with feed hopper, on described driving shaft in described casing, be sequentially set with the first order and grind hammer, hammer is ground in the second level, tertiary grinding hammer and air delivery device, between described tertiary grinding hammer and described air delivery device, be provided with dividing plate, between described dividing plate and described tertiary grinding hammer, being provided with coal dust returns and grinds groove, described casing is further provided with coal dust separation chamber, separation chamber's passage by arc between described coal dust separation chamber and described air delivery device is connected, the exit of described separation chamber passage is provided with separation dividing plate, described coal dust separation chamber and the described first order are ground between hammer and are provided with rough coal powder return duct, described rough coal powder return duct and the described first order are ground between hammer and are provided with thick coal powder entrance, described coal dust separation chamber comprises a discharge, described discharge is connected with a coal dust control device.
Preferably, the adjusting screw(rod) that described rough coal powder return duct is provided with adjustable plate and is connected with described adjustable plate near described coal dust separation chamber one side.
Preferably, the described first order is ground to hammer into shape and is comprised that being fixedly connected on first on described driving shaft hammers body into shape and be fixedly connected on the rectangle tup in described the first hammer body outside; The described second level is ground hammer and is comprised the tup bracing frame that is fixedly connected on the hammer of second on described driving shaft body, is fixedly connected on described the second hammer body outside, and the column four prismatic tups that are rotatably connected with described tup bracing frame; Described tertiary grinding hammer comprises the tup support that is fixedly connected on the hammer of the 3rd on described driving shaft body, is fixedly connected on the tup base in described the 3rd hammer body outside, is rotatably connected with described tup base, and the column four prismatic tups that are rotatably connected with described tup support.
Preferably, described feed hopper is provided with deironing apparatus.
Preferably, described feed hopper is provided with coal supply control device.
Preferably, described casing is being provided with air inlet control device near described feed hopper one side.
Energy-saving pulverized coal grinding conveying device for boiler, kiln provided by the present invention, grinds coal cinder through the grinding hammer of three groups of High Rotation Speeds, then returns mill through once Hui Yan, a sorting, makes that raw coal is ground, presses, hits in three grades of grindings, quaternity processed.Raw coal can be polished the flammable mixed coal powder for being satisfied with various operating mode instructions for uses, is almost applicable to all coals, comprises bituminous coal, anthracite, brown coal etc.The fine breeze of producing can, by abundant clean combustion, without soot emission, be eliminated boiler, the unburnt heat loss of kiln coal substantially, and significantly reduces the discharge of various pollutants.So just greatly improve the utilization ratio of raw coal, saved raw coal cost.
Accompanying drawing explanation
The following drawings is only intended to the present invention to schematically illustrate and explain, not delimit the scope of the invention.Wherein,
Fig. 1 is according to the structural representation of the energy-saving pulverized coal grinding conveying device for boiler, kiln of a specific embodiment of the present invention;
Fig. 2 is the part-structure schematic diagram that the first order of the energy-saving pulverized coal grinding conveying device for boiler, kiln shown in Fig. 1 is ground hammer;
Fig. 3 is the part-structure schematic diagram that hammer is ground in the second level of the energy-saving pulverized coal grinding conveying device for boiler, kiln shown in Fig. 1;
Fig. 4 is the part-structure schematic diagram of the tertiary grinding hammer of the energy-saving pulverized coal grinding conveying device for boiler, kiln shown in Fig. 1.
The specific embodiment
For technical characterictic of the present invention, object and effect being had more clearly, understand, now contrast accompanying drawing explanation the specific embodiment of the present invention.Wherein, identical parts adopt identical label.
Describe in detail with reference to the accompanying drawings according to structure and the principle thereof of a kind of energy-saving pulverized coal grinding conveying device for boiler, kiln of the present invention.
Fig. 1 is according to the structural representation of the energy-saving pulverized coal grinding conveying device for boiler, kiln of a specific embodiment of the present invention.As shown in Figure 1, provided by the present invention for boiler, the energy-saving pulverized coal grinding conveying device of kiln, it comprises the casing 2 being arranged in frame 1, one runs through described casing 2 and is arranged at the driving shaft 3 in frame 1, on described driving shaft 3, be provided with driving wheel 4, on described casing 2, be provided with feed hopper 5, on described driving shaft 3 in described casing 2, be sequentially set with the first order and grind hammer 6, hammer 7 is ground in the second level, tertiary grinding hammer 8 and air delivery device 9, between described tertiary grinding hammer 8 and described air delivery device 9, be provided with dividing plate 10, between described dividing plate 10 and described tertiary grinding hammer 8, being provided with coal dust returns and grinds groove 11, described casing 2 is further provided with coal dust separation chamber 12, between described coal dust separation chamber 12 and described air delivery device 9, by separation chamber's passage 121 of arc, be connected, the exit of described separation chamber passage 121 is provided with and separates dividing plate 122, described coal dust separation chamber 12 and the described first order are ground between hammer 6 and are provided with rough coal powder return duct 13, described rough coal powder return duct 13 and the described first order are ground between hammer 6 and are provided with thick coal powder entrance 131, described coal dust separation chamber 12 comprises a discharge 123, described discharge 123 is connected with a coal dust control device 14.
Described driving wheel 4 drives described driving shaft 3 to rotate, and then drives the described first order to grind hammer 6, described second level grinding hammer 7, described tertiary grinding hammer 8 and described air delivery device 9 High Rotation Speeds.The mobile power of coal dust is driven by the described air delivery device 9 of High Rotation Speed the produced negative pressure that turns round, and described air delivery device 9 can be fan.
By former coal pulverizer, be that diameter is less than after 2 centimetres of following broken coal pieces, by described feed hopper 5, be conveyed into the described energy-saving pulverized coal grinding conveying device for boiler, kiln, via described first order grinding hammer 6, carry out one-level and grind to form coal dust; Then further by the described second level, grind hammer 7 and carry out secondary grinding; Via described tertiary grinding hammer 8, further grind to form thinner coal dust again.The hollow via-hole diameter of described dividing plate 10 is 1.5-3 times of described driving shaft 3, between the hollow via-hole of described dividing plate and described driving shaft 3, forms separator channels 101.Described dividing plate 10 carries out elementary sorting to coal dust, pulverized coal particle after grinding via described tertiary grinding hammer 8 is under centrifugal action, the thicker pulverized coal particle that wherein may exist will be back to described coal dust by described dividing plate 10 gears and return and grind groove 11, when the thicker pulverized coal particle being kept off is back more, it can return and grind groove 11 and be spilled over to described tertiary grinding hammer 8 and again ground from described coal dust, in pulverized coal particle after grinding via described tertiary grinding hammer 8, thinner pulverized coal particle can enter conveying chamber 91 by the separator channels 101 between described dividing plate 10 and described driving shaft 3, through described air delivery device 9, to described coal dust separation chamber 12, carry again,
Separation chamber's passage 121 of described coal dust separation chamber 12 is curved channel; the pulverized coal particle that enters described separation chamber passage 121 from described gas transmission chamber 91 is like this under centrifugal action; thicker pulverized coal particle wherein can be against the movement outside of described separation chamber passage 121, and thinner pulverized coal particle can be against the interior lateral movement of the movement outside of described separation chamber passage 121.
In the exit of described separation chamber passage 121, be provided with and separate dividing plate 122, described separation dividing plate 122 is also arc, described separation dividing plate 122 can make the pulverized coal particle that moves to described separation dividing plate 122 from described separation chamber passage 121 be led to the position of described discharge 123, in addition, the position of described separation dividing plate 122 can be moved to described coal dust separation chamber 12 centers, between described separation dividing plate 122 and described coal dust separation chamber 12 outer walls, leave space, described space is 1-10 centimetre, against the pulverized coal particle of the movement outside of described separation chamber passage 121, can be directed to described rough coal powder return duct 13 by the space between described separation dividing plate 122 and described coal dust separation chamber 12 outer walls, therefore just can control the flow of the coal dust that is directed to described discharge 123 and need to be back to the flow of the pulverized coal particle of described rough coal powder return duct 13 by controlling the position of described separation dividing plate 122.
Described separation dividing plate 122 carries out secondary sorting to the coal dust that enters described coal dust separation chamber 12 from described separation chamber passage 121, under the effect of centrifugal force, the space of thicker pulverized coal particle between described separation dividing plate 122 and described coal dust separation chamber 12 outer walls enters rough coal powder return duct 13 under air pressure effect, then by thick coal powder entrance 131, is back to the described first order and grinds hammer 6 and again grind.Via the fine breeze particle after described separation dividing plate 122 secondary sortings, through 123 of discharges, by pipeline, deliver to coal dust control device 14, described coal dust control device 14 can comprise that one for controlling to boiler, the combustion chamber of kiln carries the air output control device of the mixed gas being comprised of fine breeze and air and one for testing the coal gas melting concn tester of described mixed gas fine breeze concentration, described like this coal dust control device 14 just can be further according to boiler, the needed combustion requirements of kiln is monitored the fine breeze concentration in described mixed gas, the output of described mixed gas is carried out to control of flow and pressure, the mixed gas that meets combustion requirements is delivered to boiler, burn in the combustion chamber of kiln.
In a preferred embodiment, the adjusting screw(rod) 133 that described rough coal powder return duct 13 is provided with adjustable plate 132 and is connected with described adjustable plate 132 near described coal dust separation chamber 12 1 sides.Can regulate the switching degree of described adjustable plate 132 to control the thick pulverized coal flow of described rough coal powder return duct 13 by described adjusting screw(rod) 133 like this.
Fig. 2 is the part-structure schematic diagram that the first order of the energy-saving pulverized coal grinding conveying device for boiler, kiln shown in Fig. 1 is ground hammer; Fig. 3 is the part-structure schematic diagram that hammer is ground in the second level of the energy-saving pulverized coal grinding conveying device for boiler, kiln shown in Fig. 1; Fig. 4 is the part-structure schematic diagram of the tertiary grinding hammer of the energy-saving pulverized coal grinding conveying device for boiler, kiln shown in Fig. 1.Shown in Fig. 1-4, in a preferred embodiment, the described first order is ground hammer 6 and is comprised that being fixedly connected on first on described driving shaft 3 hammers body 61 into shape and be fixedly connected on the rectangle tup 62 in described the first hammer body outside; The described second level is ground hammer 7 and is comprised the tup bracing frame 72 that is fixedly connected on the hammer of second on described driving shaft 3 body 71, is fixedly connected on described the second hammer body 71 outsides, and the column four prismatic tups 73 that are rotatably connected with described tup bracing frame 72; Described tertiary grinding hammer 8 comprises the tup support 83 that is fixedly connected on the hammer of the 3rd on described driving shaft 3 body 81, is fixedly connected on the tup base 82 in described the 3rd hammer body 81 outsides, is rotatably connected with described tup base 82, and the column four prismatic tups 73 that are rotatably connected with described tup support 83.
In casing, with described first order grinding hammer 6, the described second level grinds hammer 7 and 8 corresponding positions are hammered in described tertiary grinding into shape, be installed with and fight back liner plate 15, between tups at different levels and counterattack liner plate 15, leave certain gap.Like this can be when tup High Rotation Speed at different levels, make coal dust at tup and fight back between liner plate 15 to produce high-speed impact, improve grainding capacity.And described counterattack liner plate 15 can coordinate corresponding grinding hammer to adopt and arrange without material, the shape of intensity flexibly, so just can control easily the grindability of grinding hammers at different levels for coal dust, also can be convenient to the described energy-saving pulverized coal grinding conveying device for boiler, kiln to carry out maintaining simultaneously.
Described the first hammer body 61, described the second hammer body 71 and described the 3rd hammer body 81 can be the ring flanges being fixedly connected on described driving shaft 3.The first hammer body 61, described the second hammer body 71 and described the 3rd hammer body 81 can be overall disk-like structure, on it, there is no hole, coal dust can only pass through from the space between the tup at grindings at different levels hammer and corresponding counterattack liner plate 15 like this, so just can guarantee that coal dust is subject to sufficient grinding.
Said rectangle tup 62 can be the fixing rectangle manganese steel plate through high-temperature wearable processing; Can meet like this requirement of strength of elementary pulverizing.
Described tup bracing frame 72 is fixedly connected on described the second hammer body 71 outsides, described column four prismatic tups 73 are rotatably connected with described tup bracing frame 72, said column four prismatic tups 73 can be the manganese steel essences of cylindricality four rib high-temperature wearables, when described the second hammer body 71 is under described driving shaft 3 drives during High Rotation Speed, described column four prismatic tups 73 can be round installation shaft rotation with pulverized coal particle collision in process of lapping, can further strengthen so the described second level and grind the grainding capacity of hammering 7 into shape.
Described tup base 82 is fixedly connected on described the 3rd hammer body 81 outsides, on described tup base 82, be rotatably connected described tup support 83, described tup support 83 can rotate around installation shaft, column four prismatic tups 73 on described tup support 83, have been rotatably connected, described column four prismatic tups 73 can be around installation shaft rotation, when described the 3rd hammer body 81 is under described driving shaft 3 drives during High Rotation Speed, described column four prismatic tups 73 can carry out rotation round installation shaft with pulverized coal particle collision in process of lapping on the one hand, on the other hand described tup support 83 in process of lapping with pulverized coal particle collision and can installation shaft vibration rotation with described tup base 82 round it, can further strengthen like this grainding capacity of described tertiary grinding hammer 8.
In a preferred embodiment, described feed hopper 5 is provided with deironing apparatus 51.Described deironing apparatus can adsorb and remove the metal sundries the coal cinder of carrying from described feed hopper 5, avoids the described energy-saving pulverized coal grinding conveying device for boiler, kiln to cause damage.
In a preferred embodiment, described feed hopper 5 is provided with coal supply control device 52.Described coal supply control device 52 can be a valve, can be also the auger of a variable-frequency motor control, can enter according to the requirement control of gas yield like this flow of the coal cinder of the described energy-saving pulverized coal grinding conveying device for boiler, kiln.
In a preferred embodiment, described casing 2 is being provided with air inlet control device 16 near described feed hopper 5 one sides.Described air inlet control device 16 can be the air door of a limit switch control, and the intake that so just can be convenient, flexible pass through controlled the described energy-saving pulverized coal grinding conveying device for boiler, kiln is controlled the working flow rate of coal dust.
Energy-saving pulverized coal grinding conveying device for boiler, kiln provided by the present invention, grinds coal cinder through the grinding hammer of three groups of High Rotation Speeds, then returns mill through once Hui Yan, a sorting, makes that raw coal is ground, presses, hits in three grades of grindings, quaternity processed.Raw coal can be polished the flammable mixed coal powder for being satisfied with various operating mode instructions for uses, is almost applicable to all coals, comprises bituminous coal, anthracite, brown coal etc.The fine breeze of producing can, by abundant clean combustion, without soot emission, be eliminated boiler, the unburnt heat loss of kiln coal substantially, and significantly reduces the discharge of various pollutants.So just greatly improve the utilization ratio of raw coal, saved raw coal cost.
Although it will be appreciated by those skilled in the art that the present invention is described according to the mode of multiple embodiment, be not that each embodiment only comprises an independently technical scheme.For the purpose of in description, so narration is only used to know; those skilled in the art should make description as a wholely to be understood, and regard technical scheme related in each embodiment as the mode that can mutually be combined into different embodiment understand protection scope of the present invention.
The foregoing is only the schematic specific embodiment of the present invention, not in order to limit scope of the present invention.Any those skilled in the art, not departing from equivalent variations, modification and the combination done under the prerequisite of design of the present invention and principle, all should belong to the scope of protection of the invention.
Claims (6)
1. one kind for boiler, the energy-saving pulverized coal grinding conveying device of kiln, it comprises rack-mounted casing, one runs through described casing and is arranged at the driving shaft in frame, on described driving shaft, be provided with driving wheel, on described casing, be provided with feed hopper, on described driving shaft in described casing, be sequentially set with the first order and grind hammer, hammer is ground in the second level, tertiary grinding hammer and air delivery device, it is characterized in that, between described tertiary grinding hammer and described air delivery device, be provided with dividing plate, between described dividing plate and described tertiary grinding hammer, being provided with coal dust returns and grinds groove, described casing is further provided with coal dust separation chamber, separation chamber's passage by arc between described coal dust separation chamber and described air delivery device is connected, the exit of described separation chamber passage (121) is provided with and separates dividing plate (122), described coal dust separation chamber (12) and the described first order are ground between hammer (6) and are provided with rough coal powder return duct (13), pulverized coal particle against the movement outside of described separation chamber passage (121) is directed to described rough coal powder return duct (13) by the space between described separation dividing plate (122) and described coal dust separation chamber (12) outer wall, described rough coal powder return duct (13) and the described first order are ground between hammer (6) and are provided with thick coal powder entrance (131), described coal dust separation chamber comprises a discharge, described discharge is connected with a coal dust control device.。
2. the energy-saving pulverized coal grinding conveying device for boiler, kiln according to claim 1, is characterized in that, the adjusting screw(rod) that described rough coal powder return duct is provided with adjustable plate and is connected with described adjustable plate near described coal dust separation chamber one side.
3. the energy-saving pulverized coal grinding conveying device for boiler, kiln according to claim 1, it is characterized in that, the described first order is ground hammer and is comprised that being fixedly connected on first on described driving shaft hammers body into shape and be fixedly connected on the rectangle tup in described the first hammer body outside; The described second level is ground hammer and is comprised the tup bracing frame that is fixedly connected on the hammer of second on described driving shaft body, is fixedly connected on described the second hammer body outside, and the column four prismatic tups that are rotatably connected with described tup bracing frame; Described tertiary grinding hammer comprises the tup support that is fixedly connected on the hammer of the 3rd on described driving shaft body, is fixedly connected on the tup base in described the 3rd hammer body outside, is rotatably connected with described tup base, and the column four prismatic tups that are rotatably connected with described tup support.
4. the energy-saving pulverized coal grinding conveying device for boiler, kiln according to claim 1, is characterized in that, described feed hopper is provided with deironing apparatus.
5. the energy-saving pulverized coal grinding conveying device for boiler, kiln according to claim 1, is characterized in that, described feed hopper is provided with coal supply control device.
6. the energy-saving pulverized coal grinding conveying device for boiler, kiln according to claim 1, is characterized in that, described casing is being provided with air inlet control device near described feed hopper one side.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110373274.1A CN102494348B (en) | 2011-11-22 | 2011-11-22 | Energy-saving pulverized coal grinding and delivering equipment for boilers and kilns |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110373274.1A CN102494348B (en) | 2011-11-22 | 2011-11-22 | Energy-saving pulverized coal grinding and delivering equipment for boilers and kilns |
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| CN102494348A CN102494348A (en) | 2012-06-13 |
| CN102494348B true CN102494348B (en) | 2014-04-16 |
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| CN201110373274.1A Expired - Fee Related CN102494348B (en) | 2011-11-22 | 2011-11-22 | Energy-saving pulverized coal grinding and delivering equipment for boilers and kilns |
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| CN102966966B (en) * | 2012-11-12 | 2014-11-12 | 南阳市亚龙筑路机械制造有限公司 | Large dual-suction three-grinding high pressure impeller coal mill |
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| US5941467A (en) * | 1997-09-10 | 1999-08-24 | Mcardle; Matthew J. | System and method for reducing material |
| JP2000046315A (en) * | 1998-07-27 | 2000-02-18 | Ishikawajima Harima Heavy Ind Co Ltd | Pulverized coal distributing device |
| US6360975B1 (en) * | 1999-06-24 | 2002-03-26 | Ernest Csendes | Method an apparatus for comminuting solid particles |
| CN2878934Y (en) * | 2006-03-16 | 2007-03-14 | 王教业 | Burner for pulverized coal |
| CN101008496A (en) * | 2006-01-26 | 2007-08-01 | 何相助 | Combined combustion machine |
| CN100534625C (en) * | 2007-06-01 | 2009-09-02 | 安徽省华鑫铅业集团有限公司 | Centrifugal type composite coal-grinding and powder-spraying machine |
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2011
- 2011-11-22 CN CN201110373274.1A patent/CN102494348B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5941467A (en) * | 1997-09-10 | 1999-08-24 | Mcardle; Matthew J. | System and method for reducing material |
| JP2000046315A (en) * | 1998-07-27 | 2000-02-18 | Ishikawajima Harima Heavy Ind Co Ltd | Pulverized coal distributing device |
| US6360975B1 (en) * | 1999-06-24 | 2002-03-26 | Ernest Csendes | Method an apparatus for comminuting solid particles |
| CN101008496A (en) * | 2006-01-26 | 2007-08-01 | 何相助 | Combined combustion machine |
| CN2878934Y (en) * | 2006-03-16 | 2007-03-14 | 王教业 | Burner for pulverized coal |
| CN100534625C (en) * | 2007-06-01 | 2009-09-02 | 安徽省华鑫铅业集团有限公司 | Centrifugal type composite coal-grinding and powder-spraying machine |
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