CN200965228Y - Heat-conductive type coal ash concentration direct ignition device - Google Patents
Heat-conductive type coal ash concentration direct ignition device Download PDFInfo
- Publication number
- CN200965228Y CN200965228Y CN200620047468.7U CN200620047468U CN200965228Y CN 200965228 Y CN200965228 Y CN 200965228Y CN 200620047468 U CN200620047468 U CN 200620047468U CN 200965228 Y CN200965228 Y CN 200965228Y
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- Prior art keywords
- heat
- pulverized coal
- coal
- conducting
- coal concentration
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- 239000010883 coal ash Substances 0.000 title 1
- 239000003245 coal Substances 0.000 claims abstract description 70
- 238000005192 partition Methods 0.000 claims description 2
- 239000000843 powder Substances 0.000 abstract description 12
- 239000000446 fuel Substances 0.000 abstract description 4
- 230000006641 stabilisation Effects 0.000 abstract description 2
- 238000011105 stabilization Methods 0.000 abstract description 2
- 239000004020 conductor Substances 0.000 abstract 2
- 239000002470 thermal conductor Substances 0.000 abstract 2
- 239000003921 oil Substances 0.000 description 27
- 239000002817 coal dust Substances 0.000 description 22
- 238000002485 combustion reaction Methods 0.000 description 12
- 238000010438 heat treatment Methods 0.000 description 7
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 6
- 229910052760 oxygen Inorganic materials 0.000 description 6
- 239000001301 oxygen Substances 0.000 description 6
- 239000000295 fuel oil Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000007789 gas Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 239000012141 concentrate Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000003134 recirculating effect Effects 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 208000000655 Distemper Diseases 0.000 description 1
- 241000282376 Panthera tigris Species 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- RHZUVFJBSILHOK-UHFFFAOYSA-N anthracen-1-ylmethanolate Chemical compound C1=CC=C2C=C3C(C[O-])=CC=CC3=CC2=C1 RHZUVFJBSILHOK-UHFFFAOYSA-N 0.000 description 1
- 239000003830 anthracite Substances 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 239000002802 bituminous coal Substances 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000011280 coal tar Substances 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 239000003077 lignite Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000036651 mood Effects 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000004071 soot Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Images
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
Abstract
本实用新型公开了一种导热式煤粉浓缩直接点火装置，其特征为：在一次风管道中依次设有集气流环、稳焰锥体、具有小孔的导热筒体、煤粉浓缩环，在侧管中设有油点火器。使用时利用及其微小的油点火器将一次风道中的导热体和稳焰锥体加热到800~1200℃，煤粉先通过煤粉浓缩装置进行浓缩，然而后进入导热体，被高温气流和导热体加热，在瞬间着火，通过导热体前端的稳焰锥体，可使已着火的煤粉气流燃烧稳定，并点燃流过一次风道中的其余煤粉，从而使一次风道上煤粉喷嘴出口的煤粉气流直接燃烧稳定。采用此点火装置可使油耗下降到原来的3％以下，极大地降低电站锅炉的点火成本，节约能源。
The utility model discloses a heat-conducting type coal powder concentration direct ignition device, which is characterized in that: in the primary air duct, an air-collecting ring, a flame-stabilizing cone, a heat-conducting cylinder with small holes, and a coal powder concentration ring are sequentially arranged. An oil igniter is provided in the side pipe. When in use, use the extremely small oil igniter to heat the heat conductor and the flame-stabilizing cone in the primary air duct to 800~1200°C. The pulverized coal is first concentrated by the coal powder concentration device, then enters the heat conductor, and is absorbed by the high-temperature airflow and The thermal conductor heats up and ignites in an instant. Through the flame stabilization cone at the front end of the thermal conductor, the ignited pulverized coal airflow can be burned stably, and the rest of the pulverized coal flowing through the primary air duct can be ignited, so that the outlet of the pulverized coal nozzle on the primary air duct The pulverized coal airflow is directly combusted stably. The use of the ignition device can reduce the fuel consumption to less than 3% of the original level, greatly reduce the ignition cost of the utility boiler, and save energy.
Description
Technical field:
The utility model relates to the power plant soot technical field, a kind of specifically heat-conducting Pulverized Coal Concentration direct fire unit on the wind pulverized coal channel, particularly structure of its internal heat-conducting Pulverized Coal Concentration direct fire unit of being used for a time.
Background technology:
At present in the combustion system of generating plant pulverized coal boiler, the most general sparking mode of existing conventional power plant pulverized-coal fired boiler is use grease gun igniting, its mode be usually wind coal nozzle arranged alongside independently fuel ignition rifle spray nozzle device be used for lighting a fire.During boiler startup, light torch oil gun earlier, the list of this torch oil gun props up fuel oil and exerts oneself usually at 1500 ~ 3500kg/h, fire box temperature is elevated to the temperature that can make coal powder ignition by oil burner, spray into coal dust and carry out the oil-bound distemper multifuel combustion, can just stop oil spout gradually during smooth combustion up to coal dust, finish igniting.In case load reduces, wild effect appears in burning, just opens oil gun again and carries out oily coal companion burning, prevents to stop working.Usually the fuel ignition gun apparatus will burn more than 3 ~ 4 hours at least during boiler startup, and also need surely fire with oil when underrun or ature of coal are unstable.Along with unit capacity to large scale development, the significantly increase of power consumption, electric weight differs huge round the clock, and the electrical network peak-valley difference is increased greatly, thereby requires to have in the electrical network more unit to participate in peak regulation, causes igniting and helps fuel oil significantly to increase.The 50MW unit boiler starts according to the preliminary statistics once needs 5 tons of oil consumptions, and the 125MW unit boiler starts once needs 15 tons of oil consumptions, and the 200MW unit boiler starts once needs 50 tons of oil consumptions; Annual 400 tons of ignition oils, 15000 tons of the stable combustion oil of needing of 300MW unit boiler.Annual China is used for ignition of the boiler and combustion-supporting fuel oil above 6,000,000 tons.
Simultaneously, because boiler drops into combustion-supporting oil when opening stove and blowing out, electric cleaner can't be dropped into and the environmental pollution that causes is also quite serious.And in the world oil price at young tiger liter.Situation in the face of so severe this shows, coal dust direct-fire and steady combustion new technology reduce igniting combustion supporting with oil in the air channel of development of new, have great significance.
Summary of the invention:
The purpose of this utility model is to provide a kind of heat-conducting Pulverized Coal Concentration direct fire unit on the wind pulverized coal channel that is used for a time.It can utilize extremely small amount of fuel that the heat carrier in air channel is heated to 800 ~ 1200 ℃ during use, coal dust concentrates by the Pulverized Coal Concentration device earlier, yet after enter heat carrier, by high temperature gas flow and heat carrier heating, catch fire in moment, the steady flame cone by the heat carrier front end can make the breeze airflow flameholding that has caught fire, and heating flows through all the other coal dusts in the air channel one time, thereby makes the direct flameholding of breeze airflow of coal nozzle outlet on air channel.
To achieve these goals, technical scheme of the present invention is: a kind of heat-conducting Pulverized Coal Concentration direct fire unit, it mainly comprises the airduct road one time, the secondary air channel road that matches with airduct road, the secondary air channel road is provided with air door, end in an airduct road is provided with coal nozzle, side in an airduct road is established a side pipe, it is characterized in that: in an airduct road, be provided with collection air ring, steady flame cone, heat conduction cylindrical shell, Pulverized Coal Concentration ring successively, in side pipe, be provided with oil ignitor with aperture.
The utility model is owing to be provided with the collection air ring in an airduct road, steady flame cone, the heat conduction cylindrical shell, the Pulverized Coal Concentration ring, in side pipe, be provided with oil ignitor, this igniter has the following advantages during use: at first utilize and small oil ignitor is heated to 800 ~ 1200 ℃ with the heat carrier in air channel, by the Pulverized Coal Concentration device coal dust in wind pulverized coal channel is concentrated then, the coal dust that will gather is sent into heat conduction cylindrical shell middle part, by high temperature gas flow and heat carrier heating, catch fire in moment, steady flame cone by the heat carrier front end, can make the breeze airflow flameholding that has caught fire, and all the other coal dusts in the air channel are flow through in heating one time, thereby make the direct flameholding of breeze airflow of coal nozzle outlet on air channel, this igniter is rough estimates after testing: single fuel oil of igniter is exerted oneself usually at 8 ~ 25kg/h, and the 50MW unit boiler only starts once 0.13 ton of oil consumption; The 125MW unit boiler only starts once 0.24 ton of oil consumption; The 200MW unit boiler only starts once 0.5 ton of oil consumption; The 300MW unit boiler only starts once 0.6 ~ 0.8 ton of oil consumption; It is original below 3% to adopt this ignition method that oil consumption is dropped to.
Description of drawings:
Fig. 1 is a structural representation of the present utility model
Fig. 2 is heat carrier and the steady flame cone enlarged diagram among Fig. 1
Fig. 3 is an ignition process schematic diagram of the present utility model
The specific embodiment:
With reference to the accompanying drawings, the utility model further is described
The utility model is a kind of heat-conducting Pulverized Coal Concentration direct fire unit, it mainly comprises airduct road 1 one time, the secondary air channel road 8 that matches with airduct road 1, secondary air channel road 8 is provided with air door 10, be provided with coal nozzle 9 in the end in an airduct road 1, establish a side pipe 11 in a side in an airduct road, it is different from prior art and is: be provided with collection air ring 7, steady flame cone 6, the heat conduction cylindrical shell 5 with aperture, Pulverized Coal Concentration ring 2 successively in an airduct road 1, be provided with oil ignitor 3 in side pipe 11; The junction of side pipe 11 and airduct road 1 one sides is positioned at the top of heat conduction cylindrical shell 5 during enforcement, heat conduction cylindrical shell 5 is provided with some apertures 12, heat conduction cylindrical shell 5 is connected with steady flame cone 6, that is to say at the heat conduction cylindrical shell and be provided with 4 row's apertures at least, every row's aperture is at least 5 again, present embodiment is provided with 8 row's apertures at the heat conduction cylindrical shell, and every row's aperture is 9; The utility model also is provided with in side pipe 11 and cuts off gate 4, and the partition gate 4 of setting is used to prevent leakage of pulverized coal and protection oil ignitor when tiny-oil ignition device advance and retreat put into operation; The Pulverized Coal Concentration ring is a taper platform shape, and the tapering of this taper platform is the 15-35 degree; The tapering of steady flame cone is the 50-70 degree, and the distance between collection air ring and the steady flame cone is the 50-200 millimeter, and the distance between heat conduction cylindrical shell and the Pulverized Coal Concentration ring is the 80-350 millimeter.
For effect of the present utility model is described better, carry out certain analysis from Theory of Combustion again, the influence factor that influences coal dust firing is a lot, but its burning will be satisfied three conditions basically simultaneously: combustible concentration, oxygen, sufficiently high ignition temperature.Breeze airflow possesses two ignition conditions enter burner hearth in a wind pulverized coal channel before simultaneously, be coal dust and the airborne oxygen of pulverized coal conveying air-flow, though the required oxygen of the airborne oxygen of carrying usefulness in air channel and coal completing combustion is compared limited amount, can also satisfy the required amount of oxygen of initiation combustion to a certain extent.This heat-conducting Pulverized Coal Concentration direct fire unit adopts the method that improves this burning three elements of coal powder density, oxygen concentration and ignition temperature simultaneously.Experimental studies results shows, only needs small ignition energy just can make coal powder ignition and smooth combustion.
Coal powder density in the common wind pulverized coal channel 1 is at 0.4 ~ 0.6kg coal dust/kg air, behind this Pulverized Coal Concentration device, concentrate ring coal dust is concentrated on the heat carrier middle part, at this moment the concentration of coal dust will reach 3 ~ 7kg coal dust/kg air, and the breeze airflow of high concentration is very favourable to catching fire.The change in concentration of a wind breeze airflow just is reflected on the primary air ratio (r1k) in theory, get the weight percent concentration that u is a wind breeze airflow, then the pass of r1k and u is: r1k=Br/ (ρ 1kuV0 α), Br-Coal-fired capacity in the formula, a general mood powder mixture of ρ 1k-density, the V0-theoretical air requirement, α-excess air coefficient so coal powder density increase, primary air ratio reduces, and correspondingly ignition heat reduces.According to the heating power theory of catching fire, test draws the ignition temperature of the coal powder density correspondence of different coals, and is as shown in table 1:
The relation of table 1 coal powder density and ignition temperature
| Coal | Anthracite | Bituminous coal | Brown coal | ||||||
| Coal dust initial concentration (kg/kg) | 0.50 | 5.2 | 10 | 0.42 | 3.1 | 5.2 | 0.4 | 2.5 | 4 |
| The mixture ignition temperature (℃) | 1220 | 810 | 750 | 550 | 375 | 330 | 490 | 380 | 310 |
Can find out the increase along with coal powder density from table 1, the ignition temperature of breeze airflow reduces, and ignition time is short, and ignition distance also shortens.The table that draws from test as can be seen, at high temperature during 800 ~ 1000 ℃ of left and right sides, the coal dust after concentrating will be lighted fully to catch fire during by heat carrier.When using the utility model, by concentrating ring 2, the coal dust in wind pulverized coal channel is concentrated, gather coal dust and enter into heat carrier 5 middle parts, lighted and catches fire.This device utilizes the igniter 3 of extremely small oil mass in ignition process, earlier heat carrier 5 and steady flame cone 6 in air channel are heated to about 800 ~ 1200 ℃, heat carrier 5 and steady flame cone 6 are made by Fire and abrasion resistant material, and heat carrier 5 is the cylindrical shells with many apertures, (see figure 2).Its aperture can be heated by flame breakthrough, and heat carrier 5 matches with concentrating ring 2, makes the coal dust that is concentrated be collected at the high-temperature area at heat carrier 5 middle parts, by high temperature gas flow and heat carrier heating, catches fire in moment.After coal dust is caught fire by the heating of thermal-flame air-flow and heat carrier, evaporation along with moisture in coal, the rising of temperature, volatile matter begins to separate out, volatile matter separate out with fixed carbon fire burns almost carry out simultaneously, the volatile matter that discharges can burn in gaseous environment or on the coal grain surface, the heat of generation or environment temperature is raise, and coal grain itself is heated rapidly.Great changes will take place to make chemical constitution, configuration of surface and the hole mechanism of coal grain, thereby changed the reactivity worth and the burn rate of coal tar.Along with further burning, finish breeze airflow and catch fire.Coal dust after catching fire discharges a large amount of heats and again other coal dust is lighted, and forms a high temperature torch.From kinetics of combustion, high temperature can make flame stabilization, the stability limit of flame is to widen with the raising of temperature, the raising of temperature obtains flame in a big way stable, the combustible volatile matter amount of separating out in the coal dust is big simultaneously, also promptly participate in the combustible concentration height of burning, easily catch fire and smooth combustion in the stage of catching fire.Air themperature is high more in addition, flame is also stable more, when coal dust flows out steady flame cone 6 by the heat carrier front end, air-flow rear portion in steady flame cone 6 can form a recirculating zone (see figure 3), the recirculating zone can make the breeze airflow flameholding that has caught fire, and heat and flow through all the other coal dusts in the air channel one time, thereby make the direct flameholding of breeze airflow of coal nozzle 9 outlets on the air channel by collection air ring 7.Air door 10 is used for regulating the air quantity around coal nozzle 9 outlets, so that control the temperature of air channel 1 and coal nozzle 9.
Claims (6)
1, a kind of heat-conducting Pulverized Coal Concentration direct fire unit, it mainly comprises the airduct road one time, the secondary air channel road that matches with airduct road, the secondary air channel road is provided with air door, end in an airduct road is provided with coal nozzle, side in an airduct road is established a side pipe, it is characterized in that: be provided with collection air ring, steady flame cone, the heat conduction cylindrical shell with aperture, Pulverized Coal Concentration ring successively in an airduct road, be provided with oil ignitor in side pipe.
2, by the described a kind of heat-conducting Pulverized Coal Concentration direct fire unit of claim 1, it is characterized in that: the junction of a side pipe and airduct road one side is positioned at the side of heat conduction cylindrical shell.
3, by the described a kind of heat-conducting Pulverized Coal Concentration direct fire unit of claim 1, it is characterized in that: the heat conduction cylindrical shell is provided with some apertures, and the heat conduction cylindrical shell is connected with steady flame cone.
4, by the described a kind of heat-conducting Pulverized Coal Concentration direct fire unit of claim 1, it is characterized in that: in side pipe, also be provided with the partition gate.
5, by the described a kind of heat-conducting Pulverized Coal Concentration direct fire unit of claim 1, it is characterized in that: the Pulverized Coal Concentration ring is a taper platform shape, and the tapering of this taper platform is the 15-35 degree; The tapering of steady flame cone is the 50-70 degree.
6, by the described a kind of heat-conducting Pulverized Coal Concentration direct fire unit of claim 1, it is characterized in that: the distance between collection air ring and the steady flame cone is the 50-200 millimeter, and the distance between heat conduction cylindrical shell and the Pulverized Coal Concentration ring is the 80-350 millimeter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200620047468.7U CN200965228Y (en) | 2006-11-02 | 2006-11-02 | Heat-conductive type coal ash concentration direct ignition device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200620047468.7U CN200965228Y (en) | 2006-11-02 | 2006-11-02 | Heat-conductive type coal ash concentration direct ignition device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN200965228Y true CN200965228Y (en) | 2007-10-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200620047468.7U Expired - Fee Related CN200965228Y (en) | 2006-11-02 | 2006-11-02 | Heat-conductive type coal ash concentration direct ignition device |
Country Status (1)
| Country | Link |
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| CN (1) | CN200965228Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010108386A1 (en) * | 2009-03-24 | 2010-09-30 | 烟台龙源电力技术股份有限公司 | Pulverized coal concentrating device and pulverized coal burner including same |
-
2006
- 2006-11-02 CN CN200620047468.7U patent/CN200965228Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010108386A1 (en) * | 2009-03-24 | 2010-09-30 | 烟台龙源电力技术股份有限公司 | Pulverized coal concentrating device and pulverized coal burner including same |
| US20120006238A1 (en) * | 2009-03-24 | 2012-01-12 | Yantai Longyuan Power Technology Co., Ltd. | Pulverized coal concentrator and pulverized coal burner including the concentrator |
| CN101846315B (en) * | 2009-03-24 | 2012-07-04 | 烟台龙源电力技术股份有限公司 | Coal dust concentration device and coal dust burner with same |
| RU2490544C2 (en) * | 2009-03-24 | 2013-08-20 | Янтай Лунъюань Пауэр Текнолоджи Ко., Лтд. | Pulverised-coal concentrator, and pulverised-coal burner containing such concentrator |
| US8555795B2 (en) | 2009-03-24 | 2013-10-15 | Yantai Longyuan Power Technology Co., Ltd. | Pulverized coal concentrator and pulverized coal burner including the concentrator |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20071024 Termination date: 20121102 |