CN2765684Y - Device for extracting ultrafine coal powder from fine powder separating machine - Google Patents
Device for extracting ultrafine coal powder from fine powder separating machine Download PDFInfo
- Publication number
- CN2765684Y CN2765684Y CN 200420037728 CN200420037728U CN2765684Y CN 2765684 Y CN2765684 Y CN 2765684Y CN 200420037728 CN200420037728 CN 200420037728 CN 200420037728 U CN200420037728 U CN 200420037728U CN 2765684 Y CN2765684 Y CN 2765684Y
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- CN
- China
- Prior art keywords
- separating machine
- coal
- impacting
- powder
- fine powder
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 239000003245 coal Substances 0.000 title claims abstract description 43
- 239000000843 powder Substances 0.000 title abstract description 23
- 239000000284 extract Substances 0.000 claims description 9
- 239000000446 fuel Substances 0.000 abstract description 14
- 238000002485 combustion reaction Methods 0.000 abstract description 8
- 230000003116 impacting effect Effects 0.000 abstract description 6
- 230000002349 favourable effect Effects 0.000 abstract description 2
- 230000005611 electricity Effects 0.000 abstract 1
- 239000008187 granular material Substances 0.000 abstract 1
- 239000002817 coal dust Substances 0.000 description 11
- 239000002245 particle Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000000605 extraction Methods 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 125000000217 alkyl group Chemical group 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000740 bleeding effect Effects 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000002341 toxic gas Substances 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Abstract
The utility model discloses a device for extracting ultra-fine coal powder from a fine powder separating machine; an outer cylinder of a circular impacting separating machine is fixedly arranged to the lower end of the cone part of the fine powder separating machine; an inner of the impacting separating machine is fixedly arranged in the impacting separating machine; a suction tube is arranged under the impacting separating machine. Making use of the machine, the negative pressure of the suction tube acts on the rotary air flow of the lower end of the cone part of the fine powder separating machine; the rotary air flow surrounding around the circular impacting separating machine enters a slit channel formed by a tangential guide plate; flow directions are altered to 150DEG to 180 DEG; fine coal powder with small inertia follows the air flow to enter the suction tube and large granules with big inertia are separated. The utility model has the advantages that the device can collect re-burning fuel meeting requirements of the combustion of low NOx; the utility model which is easily realized in electricity factories of fire coal can reduce the emission of the NOx about 50 percent; the separating efficiency of the fine powder separating machine is enhanced; three-time powder amounts blown away by wind can be reduced by 30-40%, which is favorable for fuel combustion in a hearth.
Description
Technical field
The utility model relates to a kind of microfine coal device that extracts in the pulverized-coal collector.
Background technology
In the thermal power plant,, generally adopt the fuel staging low NOx combusting technology in order to reduce toxic gas NOx content in the flue gas.Its basic principle is to add reburning fuel on top, boiler furnace master combustion zone, in order to reduce the NOx of autonomous combustion zone.Reburning fuel should adopt the fuel that can produce a large amount of alkyl when burning, can be various natural gases, oil or coal, adopt coal dust to have extraordinary economy as reburning fuel, in the coal-burning power plant, be convenient to realize, but used coal dust is thinner than conventional pulverized-coal particle, and the source of microfine coal is a key issue.
Summary of the invention
The purpose of this utility model provides a kind of microfine coal device that extracts in the pulverized-coal collector.
Extract the device of microfine coal in the pulverized-coal collector: lower end, pulverized-coal collector tapering is fixed with separator urceolus again, in circular impingement separators urceolus center fixation the spiral-flow type inner core is arranged, and circular impingement separators inner core is divided into exhaust tube.
The utility model has the advantages that:
1) can collect and satisfy the required reburning fuel of low NOx combustion;
2) in the coal-burning power plant, be convenient to realize, and can obtain about 50% and reduce the NOx emission effect;
3) the pulverized-coal collector separative efficiency is improved, the tertiary air powder containing quantity can reduce by 30～40%, and is highly beneficial to the burner hearth fuel combustion;
Description of drawings
Fig. 1 (a) extracts microfine coal apparatus structure schematic diagram in pulverized-coal collector;
Fig. 1 (b) is the utility model clearance type deflector structure schematic diagram;
Fig. 2 takes out powder footpath and former powder directly contrasts schematic diagram;
Fig. 3 is pulverized coal sieve divided data figure;
Fig. 4 is that the exhausting rate is to taking out powder rate influence contrast schematic diagram;
Fig. 5 is that the exhausting rate directly influences the contrast schematic diagram to taking out powder.
The specific embodiment
Extract the microfine coal device in pulverized-coal collector: 1 lower end, pulverized-coal collector tapering is fixed with circular impingement separators urceolus 3, in circular impingement separators center fixation spiral-flow type inner core 2 is arranged, and circular impingement separators spiral-flow type inner core is divided into exhaust tube 4.Said circular impingement separators inner core inwall tangentially is provided with clearance type deflector 5.The slit of the clearance type deflector that is provided with of separator spiral-flow type inner core is 1～10mm again, and the length of deflector is 100～300mm, and width is 10～50mm.
Extract the separation method of microfine coal in the pulverized-coal collector: utilize device as claimed in claim 1, the swirling eddy in pulverized-coal collector tapering is subjected to the exhaust tube suction function, swirling eddy enters the gallery that is formed by the tangential flow guiding plate around circular impingement separators spiral-flow type inner barrel, flow direction has changed 150 °～180 °, the less fine breeze particle of inertia enters pump-line with air-flow, and the bulky grain that inertia is bigger is separated.
Adopt the method for cylindrical shape separator separating ultra-fine coal dust, satisfy the quantity and the fineness requirement of the required reburning fuel of low NOx combustion fully.As shown in Figure 1, the circular impingement separators of pulverized-coal collector cone bottom is made up of the spiral-flow type inner barrel, outer cylinder body and the pump-line that keep certain interval, and outer cylinder body plays support and is connected effect; The spiral-flow type inner barrel is connected with pump-line, is fixed among the outer cylinder body, plays and separates and the effect of bleeding; The spiral-flow type inner barrel has many vertical slits, and the welding of inwall slit both sides presents the deflector at certain inclination angle, constitutes many galleries.The swirling eddy in pulverized-coal collector tapering is subjected to the exhaust tube suction function, enter gallery around circular impingement separators spiral-flow type inner barrel, flow direction has changed 150～180 ° nearly, the less fine breeze particle of inertia enters gallery with air-flow, and the bulky grain with big inertia can not change so big angle, can't enter exhaust tube, so just realize that thickness separates again.Just can adjust coal powder size and take out the powder amount by changing slot number, width and angle.Simultaneously, owing to adopt the bottom air-exhaust method, the pulverized-coal collector separative efficiency is improved, the tertiary air powder containing quantity can reduce by 30～40%, and this also is very favourable to the burner hearth fuel combustion.
Application example: in a ventilation is 1800m
3On/h fine powder the piece-rate system, circular impingement separators is installed in the cyclone separator cone base, the pulverized-coal collector barrel diameter 0.4m of this system, total height 5.46m.Through scrutinizing contrast, the coal dust of extraction and former pulverized coal particle have apparent in view gap, and as shown in Figure 2, the whole fineness of gained coal dust all is less than former coal dust under 20% rate of air sucked in required, and particle diameter 10um particle proportion brings up to 5.5% by former coal dust 2.5%; As shown in Figure 3, suction performance is 22% o'clock, the R of former coal dust
90=25%, the R of extraction coal dust
90=6%, 325 mesh sieve percent of pass have reached 82%, and abroad some data shows: when reaching 75%, 325 mesh sieve percent of pass promptly satisfy the fineness requirement of coal-fired powder again, so, collect coal dust by the method and definitely reach the reburning fuel fineness requirement; As shown in Figure 4, taking out the powder amount increases with the raising of exhausting rate, the exhausting rate is 15～25% o'clock, take out the powder rate and can reach 17～27%, great mass of data confirms, the reburning fuel ratio compares rationally 10～20%, therefore as long as the rational exhausting rate of control just can be fired required enough microfine coal amounts again; As shown in Figure 5, in the process that strengthens rate of air sucked in required, coal powder size remains unchanged substantially, and this has just guaranteed that the raising rate of air sucked in required can not make coal powder size become big, thereby can not cause the contradiction of microfine coal quantity and fineness.Hence one can see that, and adopting cylindrical shape impacting type separator separating ultra-fine coal dust is practicable for reburning provides the scheme of reburning fuel.
Claims (3)
1. one kind is extracted the microfine coal device in pulverized-coal collector, it is characterized in that: lower end, pulverized-coal collector tapering (1) is fixed with circular impingement separators urceolus (3), in circular impingement separators center fixation separator spiral-flow type inner core (2) is arranged, circular impingement separators spiral-flow type inner core is divided into exhaust tube (4).
2. a kind of microfine coal device that extracts in the pulverized-coal collector according to claim 1 is characterized in that said circular impingement separators inwall tangentially is provided with clearance type deflector (5).
3. a kind of microfine coal device that extracts in the pulverized-coal collector according to claim 1, the slit that it is characterized in that the clearance type deflector that the said spiral-flow type of separator again inner core is provided with is 1～10mm, the length of deflector is 100～300mm, and width is 10～50mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420037728 CN2765684Y (en) | 2004-07-15 | 2004-07-15 | Device for extracting ultrafine coal powder from fine powder separating machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420037728 CN2765684Y (en) | 2004-07-15 | 2004-07-15 | Device for extracting ultrafine coal powder from fine powder separating machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2765684Y true CN2765684Y (en) | 2006-03-22 |
Family
ID=36606344
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420037728 Expired - Fee Related CN2765684Y (en) | 2004-07-15 | 2004-07-15 | Device for extracting ultrafine coal powder from fine powder separating machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2765684Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107952682A (en) * | 2017-11-30 | 2018-04-24 | 界首市鑫龙粮油机械加工有限公司 | A kind of adjustable cereal pneumatic separation device |
| CN111271191A (en) * | 2020-03-19 | 2020-06-12 | 湖南云顶智能科技有限公司 | Micro-powder-separating fluidizing device |
-
2004
- 2004-07-15 CN CN 200420037728 patent/CN2765684Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107952682A (en) * | 2017-11-30 | 2018-04-24 | 界首市鑫龙粮油机械加工有限公司 | A kind of adjustable cereal pneumatic separation device |
| CN107952682B (en) * | 2017-11-30 | 2020-12-18 | 界首市鑫龙粮油机械加工有限公司 | Adjustable grain winnowing device |
| CN111271191A (en) * | 2020-03-19 | 2020-06-12 | 湖南云顶智能科技有限公司 | Micro-powder-separating fluidizing device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |