CN203628634U - Upper and lower rich-lean pulverized coal combustion device - Google Patents
Upper and lower rich-lean pulverized coal combustion device Download PDFInfo
- Publication number
- CN203628634U CN203628634U CN201320891163.4U CN201320891163U CN203628634U CN 203628634 U CN203628634 U CN 203628634U CN 201320891163 U CN201320891163 U CN 201320891163U CN 203628634 U CN203628634 U CN 203628634U
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- coal
- pulverized coal
- burner
- spout
- thin powdered
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- 239000003245 coal Substances 0.000 title claims abstract description 150
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 22
- 238000001816 cooling Methods 0.000 claims abstract description 12
- 230000036651 mood Effects 0.000 claims description 18
- 239000002817 coal dust Substances 0.000 claims description 15
- 239000000843 powder Substances 0.000 claims description 14
- 210000004894 snout Anatomy 0.000 claims description 13
- 238000005452 bending Methods 0.000 claims description 6
- 238000005260 corrosion Methods 0.000 abstract description 9
- 230000007797 corrosion Effects 0.000 abstract description 9
- 238000000926 separation method Methods 0.000 abstract description 3
- 238000005507 spraying Methods 0.000 abstract 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 1
- 239000000203 mixture Substances 0.000 description 8
- 238000010586 diagram Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 5
- 238000010304 firing Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 235000017899 Spathodea campanulata Nutrition 0.000 description 1
- 238000005119 centrifugation Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
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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
The utility model relates to a tangential direct flow pulverized coal combustion device and provides an upper and lower rich-lean pulverized coal combustion device, for solving such common problems of an existing upper and lower rich-lean combustor easily as primary air deflection, water cooling wall slag-bonding and high-temperature corrosion. According to the upper and lower rich-lean pulverized coal combustion device, an inner cavity of a shell is a pulverized coal separation channel; a plurality of baffles are obliquely arranged in the pulverized coal separation channel in sequence; separated rich pulverized coal airflow and lean pulverized coal airflow enter a rich pulverized coal primary air channel and a lean pulverized coal primary air channel separately; a middle surrounding air channel is arranged between the rich pulverized coal primary air channel and the lean pulverized coal primary air channel; a rich pulverized coal spraying nozzle is arranged at a spraying nozzle end of the rich pulverized coal primary air channel to form an independent rich pulverized channel; a lean pulverized coal spraying nozzle is arranged at the spraying nozzle end of the lean pulverized coal primary air channel to form an independent lean pulverized channel; and the two praying nozzles are subjected to swinging control respectively. The upper and lower rich-lean pulverized coal combustion device is used for combusting the pulverized coal in a coal combustion boiler.
Description
Technical field
The utility model belongs to coal-powder boiler tangential firing technology, is specifically related to a kind of upper and lower gradation coal burner.
Background technology
Coal-powder boiler tangential firing technology refers generally to breeze airflow and introduces from the parallel flow burner that is arranged in 4 jiaos, burner hearth (or 6 jiaos, 8 jiaos) mode that burner hearth burns.The wind powder mixture co-operating coming by each angle forms a strong eddy flow fireball burning in stove.General first and second Chang Wei interval, air port layout, the geometric center lines in each air port is all tangent with one or several imaginary circle of central authorities respectively.
Upper and lower dense-dilute burner combustion technology has been widely used in the tangential coal dust firing of direct current field.It is that a wind is carried out to deep or light classification in short transverse, form thick coal culm air-flow and thin powdered coal air-flow, thick coal culm air-flow is in the time of burning, because ignition heat reduces, Volatile is fast, and burning rapidly, is conducive to catching fire and burning of coal dust, simultaneously because thick coal culm air-flow and thin powdered coal air-flow have all departed from stoichiometric ratio burning, so can reduce the generation of NOx.Specifically, in the exploitation of burner, U.S. CE company has developed wide regulating ratio (WR) burner, utilizes the centrifugation of elbow to form bias pulverized coal air-flow, and then bias pulverized coal air-flow enters burner hearth by the horizontal baffle being arranged in nozzle body; Low pollution (PM) burner of Mitsubishi Heavy Ind. Ltd. (MHI) development, mainly formed by airduct, elbow, thick coal culm spout and a thin powdered coal spout, primary wind and powder air-flow separates in the time of elbow under the effect of centrifugal force, thick coal culm air-flow enters burner hearth by top nozzle, thin powdered coal air-flow enters burner hearth by lower nozzle, thereby realizes the upper and lower bias combustion of coal dust.But find in actual moving process, while adopting upper and lower bias combustion, deflection easily occurs a wind, occurring when deflection, a dense wind breeze airflow, in the zonal combustion close to from water-cooling wall, causes the phenomenons such as water-cooling wall slagging scorification and high temperature corrosion.
For the upper and lower shade burner of part easily cause a windage yaw tiltedly, the phenomenon such as water-cooling wall slagging scorification and high temperature corrosion, need to develop one and meet boiler normal airflow and flow and burning, and can further reduce to a certain extent the new burner that NOx generates.
In sum, existing upper and lower shade burner easily cause a windage yaw tiltedly, the problem of water-cooling wall slagging scorification and high temperature corrosion.
Utility model content
The purpose of this utility model be for solve existing upper and lower shade burner easily cause a windage yaw tiltedly, the problem of water-cooling wall slagging scorification and high temperature corrosion.And then provide one upper and lower gradation coal burner.
The technical solution of the utility model is: a kind of upper and lower gradation coal burner, it comprises housing, surrounding air passage in the middle of described coal powder burner also comprises, multiple baffle plates, wind snout of thick coal culm and wind snout of thin powdered coal, the inner chamber of housing is coal dust split tunnel, described multiple baffle plate is inclined in coal dust split tunnel successively, and breeze airflow is separated into general mood stream of thick coal culm and general mood stream of thin powdered coal by multiple baffle plates, general mood stream of thick coal culm and general mood stream of thin powdered coal enter respectively wind passage of thick coal culm and wind passage of thin powdered coal, the two surrounding air passage being arranged in the middle of general mood stream of thick coal culm and general mood stream of thin powdered coal is separated, the spout end that wind snout of thick coal culm is arranged on a wind passage of thick coal culm forms independently thick coal culm passage, the spout end that thin powdered coal spout is arranged on a wind passage of thin powdered coal forms independently wind passage of thin powdered coal, thick coal culm spout center line and thin powdered coal spout center line form angle between projection line on burner hearth horizontal plane.
The utility model compared with prior art has following effect:
The utility model is by the independent spout setting of a upper and lower deep or light wind, can realize in the time of low secondary wind speed and being flowed by air-flow stove inner tissue of thin powdered coal, when an air-flow quick ignition burning of thick coal culm, prevent that on the one hand high concentration pulverized coal air-flow brush wall from causing slagging scorification and high temperature corrosion, on cross section, form horizontal direction fractional combustion with thin powdered coal air-flow on the other hand, and then in upper and lower bias combustion, the generation of NOx is further controlled.Owing to adopting independent spout, the swing setting of one group of adjacent deep or light spout between two realizes pulverized coal air to separate, further reduced the generation of NOx.
Upper and lower deep or light two strands of wind of a wind coal burner of the present utility model spray in stove with certain angle on horizontal plane.This can prevent that high concentration pulverized coal air-flow brush wall from causing water-cooling wall slagging scorification and high temperature corrosion on the one hand, also can on cross section, form fractional combustion with thin powdered coal air-flow on the other hand, and outside, powder (being divided into again light and dense) is in interior bellows chamber powder burning form for wind.
Accompanying drawing explanation
Fig. 1 is the utility model burner schematic diagram;
Fig. 2 is that the utility model is applied to wind of Process In A Tangential Firing thick coal culm and the arrangement form schematic diagram of wind of thin powdered coal in stove;
Fig. 3 is a wind coal burner spout arrangement form schematic diagram of the present utility model;
Fig. 4 is wind passage of thick coal culm of the present utility model and spout schematic diagram;
Fig. 5 is wind passage of thin powdered coal of the present utility model and spout schematic diagram;
Fig. 6 is that the device of symmetrical combustion between two of the present utility model swings control schematic diagram;
Fig. 7 is wind of six-corner tangential boiler thick coal culm of the present utility model and the arrangement form schematic diagram of wind of thin powdered coal in stove.
The specific embodiment
The specific embodiment one: in conjunction with Fig. 1, Fig. 3, Fig. 4 and Fig. 5 illustrate present embodiment, present embodiment comprises housing 12, surrounding air passage 5 in the middle of described coal powder burner also comprises, multiple baffle plates 6, wind snout 1 of thick coal culm and wind snout 2 of thin powdered coal, the inner chamber of housing 12 is coal dust split tunnel, described multiple baffle plate 6 is inclined in coal dust split tunnel successively, and breeze airflow is separated into general mood stream of thick coal culm and general mood stream of thin powdered coal by multiple baffle plates 6, general mood stream of thick coal culm and general mood stream of thin powdered coal enter respectively wind passage 3 of thick coal culm and wind passage 4 of thin powdered coal, the two surrounding air passage 5 being arranged in the middle of general mood stream of thick coal culm and general mood stream of thin powdered coal is separated, the spout end that wind snout 1 of thick coal culm is arranged on a wind passage 3 of thick coal culm forms independently thick coal culm passage, the spout end that thin powdered coal spout 2 is arranged on a wind passage 4 of thin powdered coal forms independently wind passage of thin powdered coal, thick coal culm spout center line and thin powdered coal spout center line form angle between projection line on burner hearth horizontal plane.
The specific embodiment two: in conjunction with Fig. 1, present embodiment is described, the quantity of multiple baffle plates 6 of present embodiment is 2-5.So arrange, be convenient to coal dust channel separation to become independently deep or light two coal dust passages.Other composition and annexation are identical with the specific embodiment one.
The specific embodiment three: in conjunction with Fig. 1, present embodiment is described, the quantity of multiple baffle plates 6 of present embodiment is 3.So arrange, coal dust split tunnel good separating effect, resistance is little, and air-flow is in the distribution uniform of deep or light both sides.Other composition and annexation are identical with the specific embodiment one or two.
The specific embodiment four: in conjunction with Fig. 3, present embodiment is described, the surrounding of the housing 12 of present embodiment is equipped with surrounding air.So arrange, as the auxiliary wind of using of burner.Other composition and annexation are identical with the specific embodiment one, two or three.
The middle surrounding air passage 5 of present embodiment is with the common auxiliary wind of using as burner of surrounding air 13 of burner surrounding.
The specific embodiment five: in conjunction with Fig. 1, present embodiment is described, wind snout of thick coal culm 1 of present embodiment is the independent spout with bluff body 8 and steady combustion tooth 11.So arrange, can strengthen and catch fire and smooth combustion.Other composition and annexation are identical with the specific embodiment one or four.
The specific embodiment six: in conjunction with Fig. 1, present embodiment is described, the thin powdered coal spout 2 of present embodiment is the independent spout with deflection bluff body 14.So arrange, can strengthen and catch fire and smooth combustion, coordinate spout to realize air flow deflector simultaneously.Other composition and annexation are identical with the specific embodiment one or four.
The specific embodiment seven: in conjunction with Fig. 5, present embodiment is described, the coal powder burner of present embodiment also comprises multiple bending guide plates 7, multiple bending guide plates 7 are by being vertically set on successively in wind passage 4 of thin powdered coal.So arrange, be convenient to the thin powdered coal air-flow general tangent direction that leads.Other composition and annexation are identical with the specific embodiment one or six.
The specific embodiment eight: in conjunction with Fig. 5, present embodiment is described, the quantity of multiple bending guide plates 7 of present embodiment is 3.So arrange, guide effect is good and resistance is little.Other composition and annexation are identical with the specific embodiment seven.
The specific embodiment nine: present embodiment is described in conjunction with Fig. 2, Fig. 4 and Fig. 5, the utility model adopts low-angle (0-5 °) traditional method of indicating the pronunciation of a Chinese character to arrange in pulverized-coal fired boiler stove, wind passage 3 of thick coal culm and wind snout 1 of thick coal culm keep the direction that same integral burner is the same, wind traditional method of indicating the pronunciation of a Chinese character of thick coal culm was sprayed in stove to (clockwise), and meanwhile thin powdered coal spout 2 is deflected in tangent (counterclockwise) direction inflow stove to water-cooling wall direction.Deep or light two strands of wind (powder) spray in stove with certain angle (4-12 °).This can prevent that high concentration pulverized coal air-flow brush wall from causing water-cooling wall slagging scorification and high temperature corrosion on the one hand, also can on cross section, form fractional combustion with thin powdered coal air-flow on the other hand, and outside, powder, in interior bellows chamber powder burning form, reduces the generation of NOx to wind.
The specific embodiment ten: as shown in Fig. 1, Fig. 3 and Fig. 5, the independent spout of thin powdered coal spout 2 for containing bluff body 8, adopts up and down and the larger surrounding air 10 of back-fire side area is arranged, less to fiery side surrounding air area.
The specific embodiment 11: as shown in Figure 1, Figure 3 and Figure 4, wind snout of thick coal culm 1, for containing the independent spout of bluff body 8 and steady combustion tooth 11, adopts the larger surrounding air 9 of back-fire side area to arrange, less to fiery side and upper and lower surrounding air area.
The specific embodiment 12: as shown in Figure 6, when this burner is longitudinally arranged in stove, adopt and be arranged symmetrically with between two, from top to bottom be followed successively by: A light-A is dense-B is dense-B is light-C is light-C is dense-D is dense-D is light-, wherein the dense spout of each burner and the light spout of adjacent burner share one group of vertical oscillation mechanism, namely A light+B is dense+C is light+D is dense+as tilting burner group downwards, and A dense+B is light+C is dense+D is light+as tilting burner group upwards, when so each swing, a thick coal culm spout is flapped toward adjacent thick coal culm spout, thin powdered coal spout is flapped toward adjacent thin powdered coal spout, realize reassociating of coal dust, further strengthen the effect of fuel staging, reduce the generation of NOx.
The specific embodiment 13: the utility model be suitable for the tangential pulverized-coal fired boiler of direct current the layout of low nitrogen combustion apparatus on tangential firing with burners located at six corners boiler furnace cross section as shown in Figure 7.
A wind coal burner of present embodiment is arranged some grades of sloping baffles in first half passage, and coal dust enters after burner, is separated into the thick coal culm air-flow of upside and the thin powdered coal air-flow of downside by these baffle plates, enters in stove by passage separately.
The specific embodiment 14: the angle that thick coal culm spout center line and thin powdered coal spout center line form between projection line on burner hearth horizontal plane is between 4-12 °, and thin powdered coal spout is to the deflection of water-cooling wall direction.So arrange, outside can forming on burner hearth cross section, light interior dense pulverized coal particle distributes, thick coal culm air-flow is difficult for deflection and washes away wall, water-cooling wall slagging scorification and high temperature corrosion are reduced, also can on cross section, form fractional combustion with thin powdered coal air-flow on the other hand, delay coal dust mixes with air, reduces the generation of NOx.
Claims (9)
1. a upper and lower gradation coal burner, it comprises housing (12), it is characterized in that: surrounding air passage (5) in the middle of described coal powder burner also comprises, multiple baffle plates (6), a wind snout of a wind snout of thick coal culm (1) and thin powdered coal (2), the inner chamber of housing (12) is coal dust split tunnel, described multiple baffle plate (6) is inclined in coal dust split tunnel successively, and breeze airflow is separated into general mood stream of thick coal culm and general mood stream of thin powdered coal by multiple baffle plates (6), general mood stream of thick coal culm and general mood stream of thin powdered coal enter respectively a wind passage of thick coal culm (3) and a wind passage of thin powdered coal (4), the two surrounding air passage (5) being arranged in the middle of general mood stream of thick coal culm and general mood stream of thin powdered coal is separated, the spout end that a wind snout of thick coal culm (1) is arranged on a wind passage of thick coal culm (3) forms independently thick coal culm passage, the spout end that thin powdered coal spout (2) is arranged on a wind passage of thin powdered coal (4) forms independently wind passage of thin powdered coal, thick coal culm spout center line and thin powdered coal spout center line form angle between projection line on burner hearth horizontal plane.
2. the upper and lower gradation coal burner of one according to claim 1, is characterized in that: the quantity of described multiple baffle plates (6) is 2-5.
3. the upper and lower gradation coal burner of one according to claim 1 and 2, is characterized in that: the quantity of described multiple baffle plates (6) is 3.
4. the upper and lower gradation coal burner of one according to claim 3, is characterized in that: the surrounding of described housing (12) is equipped with surrounding air.
5. according to the upper and lower gradation coal burner of the one described in claim 1 or 4, it is characterized in that: a wind snout of described thick coal culm (1) is the independent spout that swings with bluff body (8) and steady combustion tooth (11).
6. according to the upper and lower gradation coal burner of the one described in claim 1 or 4, it is characterized in that: described thin powdered coal spout (2) is the independent spout that swings with deflection bluff body (14).
7. the upper and lower gradation coal burner of one according to claim 1, is characterized in that: described coal powder burner also comprises multiple bending guide plates (7), and multiple bending guide plates (7) are vertically set in a wind passage of thin powdered coal (4) successively.
8. the upper and lower gradation coal burner of one according to claim 7, is characterized in that: the quantity of described multiple bending guide plates (7) is 3.
9. the upper and lower gradation coal burner of one according to claim 1, it is characterized in that: the angle that thick coal culm spout center line and thin powdered coal spout center line form between projection line on burner hearth horizontal plane is between 4-12 °, and thin powdered coal spout is to the deflection of water-cooling wall direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320891163.4U CN203628634U (en) | 2013-12-31 | 2013-12-31 | Upper and lower rich-lean pulverized coal combustion device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320891163.4U CN203628634U (en) | 2013-12-31 | 2013-12-31 | Upper and lower rich-lean pulverized coal combustion device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203628634U true CN203628634U (en) | 2014-06-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320891163.4U Expired - Fee Related CN203628634U (en) | 2013-12-31 | 2013-12-31 | Upper and lower rich-lean pulverized coal combustion device |
Country Status (1)
| Country | Link |
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| CN (1) | CN203628634U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103672864A (en) * | 2013-12-31 | 2014-03-26 | 北京国电龙高科环境工程技术有限公司 | Upper-lower concentrated-diluted pulverized-coal burning device |
| CN104329669A (en) * | 2014-10-15 | 2015-02-04 | 上海发电设备成套设计研究院 | Bitangent circular thick and thin separation adjustable direct-current coal powder combustor |
-
2013
- 2013-12-31 CN CN201320891163.4U patent/CN203628634U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103672864A (en) * | 2013-12-31 | 2014-03-26 | 北京国电龙高科环境工程技术有限公司 | Upper-lower concentrated-diluted pulverized-coal burning device |
| CN103672864B (en) * | 2013-12-31 | 2016-05-11 | 北京国电龙高科环境工程技术有限公司 | A kind of upper and lower gradation coal burner |
| CN104329669A (en) * | 2014-10-15 | 2015-02-04 | 上海发电设备成套设计研究院 | Bitangent circular thick and thin separation adjustable direct-current coal powder combustor |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20210426 Address after: Room f2038, 2nd floor, No.1, building 125, No.16, Jile Sandao street, Nangang District, Harbin City, Heilongjiang Province Patentee after: Harbin Mingnuo Environmental Protection Technology Co.,Ltd. Address before: 100085, D, building 9, Ka Wah building, 402 3rd Street, Beijing, Haidian District Patentee before: BEIJING GUODIAN LONGGAOKE ENVIRONMENT ENGINEERING & TECHNOLOGY Co.,Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140604 |