CN104279575B - Medium-speed coal mill exhaust extraction system - Google Patents
Medium-speed coal mill exhaust extraction system Download PDFInfo
- Publication number
- CN104279575B CN104279575B CN201410502003.5A CN201410502003A CN104279575B CN 104279575 B CN104279575 B CN 104279575B CN 201410502003 A CN201410502003 A CN 201410502003A CN 104279575 B CN104279575 B CN 104279575B
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- CN
- China
- Prior art keywords
- primary air
- medium
- shrinkage cavity
- pulverized coal
- air piping
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- 238000000605 extraction Methods 0.000 title claims abstract description 13
- 239000003245 coal Substances 0.000 title abstract description 24
- 239000000843 powder Substances 0.000 claims description 24
- 230000001105 regulatory effect Effects 0.000 claims description 6
- 238000005516 engineering process Methods 0.000 abstract description 6
- 239000000428 dust Substances 0.000 abstract description 5
- 239000004744 fabric Substances 0.000 abstract description 4
- 239000002817 coal dust Substances 0.000 description 5
- 238000002485 combustion reaction Methods 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000000571 coke Substances 0.000 description 1
- 238000004939 coking Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004899 motility Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
Abstract
The invention relates to a medium-speed coal mill exhaust extraction system and belongs to medium-speed coal mill exhaust extraction systems. Five evenly-distributed primary air pipes are fixedly connected with a medium-speed coal mill outlet separator. One of the primary air pipes is connected with a cloth bag dust remover. The cloth bag dust remover is further connected with an induced draft fan. The lower portion of the cloth bag dust remover is connected with a pulverized coal bin. Four pulverized coal feeders are respectively connected to the lower portion of the pulverized coal bin. Continuous curve type adjusting cavity shrinking devices are respectively fixedly connected above the rest four primary air pipes. The pulverized coal feeders are respectively connected with the rest four primary air pipes through pipelines, and the rest four primary air pipes are communicated with a hearth. The novel medium-speed coal mill exhaust extraction system has the advantages that the system is novel in structure, high in flexibility and adjustable in exhaust extraction amount; accurate distribution is achieved, the rotation speeds of the redistribution pulverized coal feeders can be controlled precisely by the system combining with a pulverized coal concentration online device, and pulverized coal redistribution, which cannot be achieved by traditional distribution technologies, for pulverized coal pipes of different concentrations is achieved.
Description
Technical field
The invention belongs to medium-speed pulverizer weary gas extraction system.
Background technology
At present, the newly-built large-sized boiler of our province configures medium-speed pulverizer unit pulverized-coal system in a large number, by the coal dust needed for coal pulverizer 4 or 5 burner combustion of supply.After operation, often due to the coal powder distribation inequality of the 4 or 5 of same coal pulverizer supply burners causes abnormal combustion in Boiler Furnace, show as burner coking or scaling loss, furnace flame deflection seriously causes boiler coke load down to run, furnace outlet NOx does not reaches design level, flying dust and big slag combustible content high, have a strong impact on safety and the economical operation of boiler.
Summary of the invention
The present invention provides a kind of medium-speed pulverizer weary gas extraction system, causes the problem of abnormal combustion in Boiler Furnace solving coal powder distribation inequality.
The present invention adopts the technical scheme that: five uniform primary air piping are fixing with medium-speed pulverizer discharge knockout drum to be connected, wherein a primary air piping is connected with sack cleaner, this sack cleaner is also connected with air-introduced machine, it is connected with powder cabin below this sack cleaner, four machine supplying powders are connected respectively below this powder cabin, four tops of remaining in five primary air piping are respectively fixedly connected with full curve type regulation shrinkage cavity device, by pipeline, remaining four primary air piping is connected this machine supplying powder with this respectively, and these remaining four primary air piping are connected with burner hearth.
The structure of full curve type of the present invention regulation shrinkage cavity device is: install string regulation shrinkage cavity on primary air piping, the regulation shrinkage cavity of these row is closely contacted with each other, the outer rim of the shrinkage cavity regulating block being positioned at airduct constitutes continuous print curve Y, and the equation of this curve Y is: y=0.085x2 。
Regulation shrinkage cavity quantity of the present invention is 12.
Regulation shrinkage cavity structure of the present invention is that adjusting screw rod is threadeded with shrinkage cavity regulating block.
It is an advantage of the invention that novel structure, medium-speed pulverizer weary gas extraction system uses pulverized coal preparation system semi-open type mode.Extract part primary wind and powder mixture from separator outlet, and carry out cloth bag separation, the coal dust separated is redistributed.This technology can eliminate coal pulverizer, the separator impact on coal powder distribation, reaches the purpose of coal powder distribation.Original system resistance does not changes, cold conditions wind multi-angle, comprehensive primary air piping speed leveling technology and hot dynamic overall process wind speed, the powder amount adjustment technology used, original system resistance does not changes, and less on original system impact, motility is high, the extraction amount of weary gas can regulate, distribution is more accurate, in conjunction with coal powder density on-line equipment, can accurately control the rotating speed of reallocation machine supplying powder, tube cell to variable concentrations carries out the reallocation of coal dust, and this is that conventional allocation technology is beyond one's reach effect.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention；
Fig. 2 is the structural representation of full curve type of the present invention regulation shrinkage cavity device；
Fig. 3 is the A-A sectional view of Fig. 2.
Detailed description of the invention
Five uniform primary air piping 1 are fixing with medium-speed pulverizer discharge knockout drum 2 to be connected, wherein a primary air piping is connected with sack cleaner 3, this sack cleaner is also connected with air-introduced machine 4, it is connected with powder cabin 5 below this sack cleaner, four machine supplying powders 6 are connected respectively below this powder cabin, four tops of remaining in five primary air piping 1 are respectively fixedly connected with full curve type regulation shrinkage cavity device 7, by pipeline, remaining four primary air piping is connected this machine supplying powder 6 with this respectively, and these remaining four primary air piping are connected with burner hearth 8.
The structure of full curve type of the present invention regulation shrinkage cavity device is: install string regulation shrinkage cavity 701 on primary air piping 1, the regulation shrinkage cavity of these row is closely contacted with each other, the outer rim of the shrinkage cavity regulating block 70102 being positioned at airduct constitutes continuous print curve Y, and the equation of this curve Y is: y=0.085x2 。
Regulation shrinkage cavity 701 quantity of the present invention is 12.
Regulation shrinkage cavity 701 structure of the present invention is that adjusting screw rod 70101 is threadeded with shrinkage cavity regulating block 70102.
Medium-speed pulverizer discharge knockout drum was evenly equipped with 4 primary air piping originally, transform uniform 5 primary air piping as, is wherein provided with full curve type regulation shrinkage cavity device on four pipelines, can adjust the size of weary tolerance；Wherein the wind powder of a primary air piping is after bag-type dust, and weary gas enters air by air-introduced machine, and the coal dust of separation is stored in small-size powder bin.Four small-sized machine supplying powders are installed under powder cabin, respectively for 4 primary air piping coal dusts, as required the coal dust separated are reallocated.
Claims (3)
1. a medium-speed pulverizer weary gas extraction system, five uniform primary air piping are fixing with medium-speed pulverizer discharge knockout drum to be connected, wherein a primary air piping is connected with sack cleaner, this sack cleaner is also connected with air-introduced machine, it is connected with powder cabin below this sack cleaner, four machine supplying powders are connected respectively below this powder cabin, it is characterized in that: four tops of remaining in five primary air piping are respectively fixedly connected with full curve type regulation shrinkage cavity device, by pipeline, remaining four primary air piping is connected this machine supplying powder with this respectively, these remaining four primary air piping are connected with burner hearth；
The structure of described full curve type regulation shrinkage cavity device is: install string regulation shrinkage cavity on primary air piping, and the regulation shrinkage cavity of these row is closely contacted with each other, and the outer rim of the shrinkage cavity regulating block being positioned at airduct constitutes continuous print curve Y, and the equation of this curve Y is: y=0.085x2 。
Medium-speed pulverizer the most according to claim 1 weary gas extraction system, it is characterised in that: described regulation shrinkage cavity quantity is 12.
Medium-speed pulverizer the most according to claim 1 and 2 weary gas extraction system, it is characterised in that: described regulation shrinkage cavity structure is that adjusting screw rod is threadeded with shrinkage cavity regulating block.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410502003.5A CN104279575B (en) | 2014-09-28 | 2014-09-28 | Medium-speed coal mill exhaust extraction system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410502003.5A CN104279575B (en) | 2014-09-28 | 2014-09-28 | Medium-speed coal mill exhaust extraction system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104279575A CN104279575A (en) | 2015-01-14 |
| CN104279575B true CN104279575B (en) | 2017-01-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410502003.5A Active CN104279575B (en) | 2014-09-28 | 2014-09-28 | Medium-speed coal mill exhaust extraction system |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3338445A1 (en) * | 1983-10-22 | 1985-05-02 | Thermo-Murg GmbH Apparatebau-Wärmetechnik, 7886 Murg | Process for purifying flue gas and plant for this process |
| CN201688428U (en) * | 2010-04-10 | 2010-12-29 | 石福军 | Boiler pulverized coal conveyer system |
| CN202132968U (en) * | 2011-07-20 | 2012-02-01 | 上海机易电站设备有限公司 | Smoke drying steel ball brown-coal milling system |
| CN202328314U (en) * | 2011-09-21 | 2012-07-11 | 西安交通大学 | Large concentrative coal powder preparation system |
| CN202973142U (en) * | 2012-11-22 | 2013-06-05 | 孙家鼎 | Intermediate silo-type hot-air powder feeding burning tertiary-air-free system |
| CN103846026A (en) * | 2014-02-10 | 2014-06-11 | 西安交通大学 | Venturi mixer with adjustable shrinkage hole on throat |
| CN204084426U (en) * | 2014-09-28 | 2015-01-07 | 吉林省电力科学研究院有限公司 | The weary gas extraction system of novel medium-speed pulverizer |
-
2014
- 2014-09-28 CN CN201410502003.5A patent/CN104279575B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3338445A1 (en) * | 1983-10-22 | 1985-05-02 | Thermo-Murg GmbH Apparatebau-Wärmetechnik, 7886 Murg | Process for purifying flue gas and plant for this process |
| CN201688428U (en) * | 2010-04-10 | 2010-12-29 | 石福军 | Boiler pulverized coal conveyer system |
| CN202132968U (en) * | 2011-07-20 | 2012-02-01 | 上海机易电站设备有限公司 | Smoke drying steel ball brown-coal milling system |
| CN202328314U (en) * | 2011-09-21 | 2012-07-11 | 西安交通大学 | Large concentrative coal powder preparation system |
| CN202973142U (en) * | 2012-11-22 | 2013-06-05 | 孙家鼎 | Intermediate silo-type hot-air powder feeding burning tertiary-air-free system |
| CN103846026A (en) * | 2014-02-10 | 2014-06-11 | 西安交通大学 | Venturi mixer with adjustable shrinkage hole on throat |
| CN204084426U (en) * | 2014-09-28 | 2015-01-07 | 吉林省电力科学研究院有限公司 | The weary gas extraction system of novel medium-speed pulverizer |
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| Publication number | Publication date |
|---|---|
| CN104279575A (en) | 2015-01-14 |
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| CB03 | Change of inventor or designer information |
Inventor after: Zhang Rui Inventor after: Gao Changzheng Inventor after: Zhu Aijun Inventor after: Zhu Qigui Inventor after: Dong Guanliang Inventor before: Zhang Rui |
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| GR01 | Patent grant |