CN203656910U - W flame boiler and combustion device thereof - Google Patents
W flame boiler and combustion device thereof Download PDFInfo
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- CN203656910U CN203656910U CN201320878019.7U CN201320878019U CN203656910U CN 203656910 U CN203656910 U CN 203656910U CN 201320878019 U CN201320878019 U CN 201320878019U CN 203656910 U CN203656910 U CN 203656910U
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- main gas
- pulverized coal
- burner hearth
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Abstract
The utility model discloses a W flame boiler and a combustion device thereof. The combustion device comprises a pulverized coal pipe, a pulverized coal density separating device, a pulverized coal airflow pipeline and a secondary air pipeline, wherein the pulverized coal airflow pipeline comprises a main gas pipeline and an exhaust pipeline, a main gas nozzle connected with a hearth is formed in the tail end of the main gas pipeline, an exhaust nozzle connected with the hearth is formed in the tail end of the exhaust pipeline, a secondary air nozzle connected with the hearth is formed in the tail end of the secondary air pipeline, the main gas nozzle, the exhaust nozzle and the secondary air nozzle are formed in a furnace arch, the exhaust nozzle is arranged between the main gas nozzle and the secondary air nozzle, the secondary air nozzle is close to a front wall or rear wall, and the main gas nozzle is close to the center of the hearth. According to the W flame boiler and the combustion device thereof, the mixing of a main gas and secondary air is postponed, the generation of NOx is favorably reduced, the burnout of pulverized coal particles is ensured, and the problems that the pulverized coal particles of the W flame boiler are difficult in ignition and burnout, easy to slag-bond, and high in NOx emission are solved.
Description
Technical field
The utility model relates to boiler combustion technology field, relates in particular to a kind of burner and W flame boiler of W flame boiler.
Background technology
W flame boiler is a kind of specially in order to the boiler of the low volatile coal of burning, with the obvious advantage in the time using the low volatile such as anthracite and meager coal inferior coal.But the problems such as W flame boiler ubiquity coal dust after-flame in combustion process is poor, poor combustion stability, boiler scaling and NOx discharge capacity height.In order to make, coal dust catches fire in time, smooth combustion and reduce the growing amount of NOx in burner hearth, and W flame boiler often adopts fuel staging and air classification technology.
At present, part W flame boiler burner nozzle adopts direct current slit, and as shown in Figure 1A, and burner is arranged as shown in Figure 1B in groups.Breeze airflow layout alternate with Secondary Air air-flow, the rapid mixing that this is conducive to encircle overdraught, has increased the momentum that encircles overdraught, has ensured the descending degree of depth of pulverized coal particle, is conducive to the after-flame of pulverized coal particle; Arrange in groups the local heat load that has increased burner region, be conducive to catching fire of pulverized coal particle.But this burner nozzle arrangement make breeze airflow the initial stage of catching fire just and Secondary Air mix in a large number, this has increased the ignition heat of breeze airflow on the one hand, postpone catching fire of breeze airflow, make on the other hand breeze airflow at the initial stage of catching fire just under stronger oxidizing atmosphere, be unfavorable for controlling NOx.
Utility model content
In view of this, a technical problem to be solved in the utility model is to provide a kind of burner of W flame boiler, and weary gas blowout mouth is arranged between main gas blowout mouth and overfire air port.
A burner for W flame boiler, comprising: pulverized coal channel, coal powder light-dark separation device, breeze airflow pipeline and Secondary Air pipeline; Described pulverized coal channel, described coal powder light-dark separation device and described breeze airflow pipeline are connected successively; Described breeze airflow pipeline comprises: main gas tube and blast pipe road; The end of described main gas tube is provided with the main gas blowout mouth being connected with burner hearth, and the end in described blast pipe road is provided with the weary gas blowout mouth being connected with burner hearth; After described coal powder light-dark separation device, be divided into the different main gas of coal powder density and weary gas from the breeze airflow of described pulverized coal channel, described main gas enters described main gas tube and enters burner hearth through described main gas blowout mouth, and described weary gas enters described blast pipe road and enters burner hearth through weary gas blowout mouth; The end of described Secondary Air pipeline is provided with the overfire air port being connected with burner hearth; Described main gas blowout mouth, described weary gas blowout mouth and described overfire air port are all arranged on chimney arch, wherein, described weary gas blowout mouth is arranged between described main gas blowout mouth and described overfire air port, and described overfire air port is near front wall or rear wall, and described main gas blowout mouth is near burner hearth center.
According to an embodiment of the present utility model, further, the quantity in described main gas tube and described blast pipe road is all 1; 2 main gas blowout mouths that are connected with burner hearth in the end setting of described main gas tube, 2 weary gas blowout mouths that are connected with burner hearth in the end setting in described blast pipe road.
According to an embodiment of the present utility model, further, the quantity of described Secondary Air pipeline is 1; 2 overfire air ports that are connected with burner hearth in the end setting of described Secondary Air pipeline.
According to an embodiment of the present utility model, further, on described main gas tube and described blast pipe road, valving is all set.
According to an embodiment of the present utility model, further, described Secondary Air pipeline is by secondary air box device air distribution.
According to an embodiment of the present utility model, further, described main gas blowout mouth, described weary gas blowout mouth and described overfire air port be shaped as circle or rectangle.
According to an embodiment of the present utility model, further, also comprise: Pulverized Coal Concentration device; Described Pulverized Coal Concentration device is connected with described coal powder light-dark separation device by described pulverized coal channel.
A kind of W flame boiler, comprises the burner of one or more W flame boilers as above.
The burner of W flame boiler of the present utility model and W flame boiler; main gas blowout mouth is arranged in a side of leaning on into burner hearth center; overfire air port is arranged near a side of front wall or rear wall and is conducive to protect front-back wall; weary gas blowout mouth is arranged between main gas blowout mouth and overfire air port, has postponed the mixing of main gas and Secondary Air, be conducive to reduce the generation of NOx; ensure the after-flame of pulverized coal particle; solve that W flame boiler pulverized coal particle difficulty is caught fire, difficult after-flame, easily slagging scorification, NOx discharges high problem.
Brief description of the drawings
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only embodiment more of the present utility model, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Figure 1A is that the spout of the burner of W flame boiler of the prior art is arranged schematic diagram; Figure 1B is that the burner of W flame boiler of the prior art spout on burner hearth is arranged schematic diagram; Wherein, the main gas blowout mouth of 5-, the weary gas blowout mouth of 6-, 7-overfire air port, 9-front wall or rear wall, 10-burner hearth;
Fig. 2 A and 2B are according to the schematic diagram of the burner of W flame boiler of the present utility model embodiment, and wherein, Fig. 2 A is front view, and Fig. 2 B is that the spout of the burner of W flame boiler is arranged schematic diagram;
Fig. 3 is that the burner of W flame boiler of the present utility model spout on burner hearth is arranged schematic diagram.
Detailed description of the invention
With reference to the accompanying drawings the utility model is described more fully, exemplary embodiment of the present utility model is wherein described.Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtaining under creative work prerequisite, all belong to the scope of the utility model protection.Below in conjunction with figure and embodiment, the technical solution of the utility model is carried out to many-sided description.
Below in order to narrate conveniently, hereinafter alleged " left side ", " right side ", " on ", left and right, the upper and lower of D score and accompanying drawing itself is to consistent.
Main gas in the utility model refers to the denseer part of breeze airflow coal powder density after coal powder light-dark separation device, and weary gas refers to the lighter part of breeze airflow coal powder density after coal powder light-dark separation device.
The utility model provides a kind of coal burner of W flame boiler, mainly solves that W flame boiler pulverized coal particle difficulty is caught fire, difficult after-flame, easily slagging scorification, and NOx discharges high problem.
As shown in Figure 2 A and 2B, the burner of W flame boiler comprises: pulverized coal channel 11, coal powder light-dark separation device 12, breeze airflow pipeline and Secondary Air pipeline.Pulverized coal channel 11, coal powder light-dark separation device 12 and breeze airflow pipeline are connected successively.
Breeze airflow pipeline comprises: main gas tube 13 and blast pipe road 14.The end of main gas tube 13 is provided with the main gas blowout mouth 15 being connected with burner hearth, and the end in blast pipe road 14 is provided with the weary gas blowout mouth 16 being connected with burner hearth.After coal powder light-dark separation device 12, be divided into the different main gas of coal powder density and weary gas from the breeze airflow of pulverized coal channel 11, main gas enters main gas tube 13 and enters burner hearth through main gas blowout mouth 15, and weary gas enters blast pipe road 14 and enters burner hearth through weary gas blowout mouth 16.
The end of Secondary Air pipeline is provided with the overfire air port 17 being connected with burner hearth.Main gas blowout mouth 15, weary gas blowout mouth 16 and overfire air port 17 are all arranged on chimney arch 21, and weary gas blowout mouth 16 is arranged between main gas blowout mouth 15 and overfire air port 17, and overfire air port 17 is near front wall or rear wall 19, and main gas blowout mouth 15 is near burner hearth center 20.
According to an embodiment of the present utility model, the quantity in main gas tube 13 and blast pipe road 14 can be one or more; 1,2,3 etc. main gas blowout mouths 15 that can be connected with burner hearth in the end setting of main gas tube 13, the individual weary gas blowout mouths 16 such as 1,2,3 that also can be connected with burner hearth in the end setting in blast pipe road 14.The quantity of Secondary Air pipeline is one or more, 1,2,3 etc. overfire air ports 17 that are connected with burner hearth in the end setting of Secondary Air pipeline.
According to an embodiment of the present utility model, main gas blowout mouth is arranged in to a side of leaning on into burner hearth center, and chooses lower main gas wind speed, be conducive to breeze airflow ignition and steady combustion.Weary gas blowout mouth is arranged between main gas blowout mouth and overfire air port, has postponed the mixing of main gas and Secondary Air, be conducive to reduce the generation of NOx.Overfire air port is arranged in to the side near burner hearth front wall or rear wall, is conducive to prevent boiler scaling.In addition, this arrangement can be by arranging lower main gas wind speed, higher weary gas wind speed and the secondary wind speed of Geng Gao, both ensured that pulverized coal particle had lower wind speed while just having entered burner hearth, injection pulverized coal particle is descending step by step again, ensure the undershoot degree of depth of pulverized coal particle at burner hearth, increase the time of staying of pulverized coal particle in burner hearth, be beneficial to the after-flame of pulverized coal particle.
According to an embodiment of the present utility model, in main gas tube He on blast pipe road, valving is all set, for controlling the main gas in main gas tube and blast pipe road or the air inflow of weary gas.Secondary Air pipeline is logical can cross secondary air box device air distribution.Main gas blowout mouth 15, weary gas blowout mouth 16 and overfire air port 17 be shaped as circle or rectangle etc.
According to an embodiment of the present utility model, main gas enters main gas tube 13 and enters burner hearth 20 through main gas blowout mouth 15 by boiler arch 21, weary gas enters blast pipe road 14 and enters burner hearth 20 through weary gas blowout mouth 16 by boiler arch 21, and Secondary Air enters burner hearth 20 through overfire air port 17 by boiler arch 21 from secondary air box 18 is interior.
Main gas blowout mouth 25 is arranged in to the side near burner hearth 20 centers, be conducive to the main gas that coal powder density is larger and directly accept the heat of high temperature reflux flue gas and the radiant heat of thermal-flame from burner hearth, meanwhile, choose lower main gas wind speed, be conducive to the ignition and steady combustion of main gas; Overfire air port 17 is arranged in to the side near front wall or rear wall 19, makes to form one deck oxygen film near furnace wall, prevented the slagging scorification of burner hearth; Weary gas blowout mouth 16 is arranged between main gas blowout mouth 15 and overfire air port 17, has postponed the mixing of main gas and Secondary Air, suppressed preferably a large amount of generations of NOx at the coal dust firing initial stage.
In addition, by controlling main gas side adjustable contraction 22(or the valve on main gas tube 13) and blast pipe road 14 on weary gas side adjustable contraction 23(or valve) realize suitable main gas and weary gas allocation proportion; For ensureing the descending degree of depth of pulverized coal particle, choose higher weary gas wind speed and the secondary wind wind speed of Geng Gao, injection pulverized coal particle is descending step by step, increases pulverized coal particle in the time of staying of burner hearth, has ensured the after-flame of pulverized coal particle.Along being evenly arranged burner nozzle in furnace chamber width, make the volume heat load distribution in stove relatively even, avoid local temperature too high, reduce the generation of thermal NO x.
According to an embodiment of the present utility model, the burner of W flame boiler also comprises Pulverized Coal Concentration device; Pulverized Coal Concentration device is connected with coal powder light-dark separation device by pulverized coal channel.
According to an embodiment of the present utility model, as shown in Figure 3, W flame boiler comprises a burner for one or more W flame boilers as above, is uniformly distributed, and all weary gas blowout mouth 16 is arranged between main gas blowout mouth 15 and overfire air port 17 on chimney arch.
The burner of W flame boiler of the present utility model and W flame boiler, main gas blowout mouth is arranged in a side of leaning on into burner hearth center, is conducive to the ignition and steady combustion of breeze airflow; Overfire air port is arranged near a side of front wall or rear wall and is conducive to protect front-back wall, prevents slagging scorification, and can ensure the descending degree of depth of pulverized coal particle; ensure the after-flame of pulverized coal particle; solve that W flame boiler pulverized coal particle difficulty is caught fire, difficult after-flame, easily slagging scorification, NOx discharges high problem.
Above-mentioned arbitrary technical scheme disclosed in the utility model unless otherwise stated, if it discloses number range, so disclosed number range is preferred number range, any it should be appreciated by those skilled in the art: preferred number range is only the obvious or representative numerical value of technique effect in many enforceable numerical value.Because numerical value is more, cannot be exhaustive, so the utility model just discloses part numerical value to illustrate the technical solution of the utility model, and the above-mentioned numerical value of enumerating should not form the restriction of the utility model being created to protection domain.
Simultaneously, if above-mentioned the utility model discloses or has related to parts or the structural member of connection fastened to each other, so, unless otherwise stated, be fixedly connected with and can be understood as: can dismantle and be fixedly connected with (for example using bolt or screw to connect), also can be understood as: non-removable being fixedly connected with (for example rivet, weld), certainly, connection fastened to each other also can for example, be replaced (obviously cannot adopt except integrally formed technique) by integral type structure (use casting technique is integrally formed to be created).
In addition, in the disclosed arbitrary technical scheme of above-mentioned the utility model applied for the term that represents position relationship or shape unless otherwise stated its implication comprise and its approximate, similar or approaching state or shape.Arbitrary parts that the utility model provides can be both to be assembled by multiple independent parts, the produced separate part of the technique that also can be one of the forming.
Finally should be noted that: above embodiment is only in order to illustrate that the technical solution of the utility model is not intended to limit; Although the utility model is had been described in detail with reference to preferred embodiment, those of ordinary skill in the field are to be understood that: still can modify or part technical characterictic is equal to replacement detailed description of the invention of the present utility model; And not departing from the spirit of technical solutions of the utility model, it all should be encompassed in the middle of the technical scheme scope of the utility model request protection.
Claims (8)
1. a burner for W flame boiler, is characterized in that, comprising:
Pulverized coal channel, coal powder light-dark separation device, breeze airflow pipeline and Secondary Air pipeline;
Described pulverized coal channel, described coal powder light-dark separation device and described breeze airflow pipeline are connected successively; Described breeze airflow pipeline comprises: main gas tube and blast pipe road; The end of described main gas tube is provided with the main gas blowout mouth being connected with burner hearth, and the end in described blast pipe road is provided with the weary gas blowout mouth being connected with burner hearth; After described coal powder light-dark separation device, be divided into the different main gas of coal powder density and weary gas from the breeze airflow of described pulverized coal channel, described main gas enters described main gas tube and enters burner hearth through described main gas blowout mouth, and described weary gas enters described blast pipe road and enters burner hearth through weary gas blowout mouth;
The end of described Secondary Air pipeline is provided with the overfire air port being connected with burner hearth; Described main gas blowout mouth, described weary gas blowout mouth and described overfire air port are all arranged on chimney arch, wherein, described weary gas blowout mouth is arranged between described main gas blowout mouth and described overfire air port, and described overfire air port is near front wall or rear wall, and described main gas blowout mouth is near burner hearth center.
2. device as claimed in claim 1, is characterized in that:
The quantity in described main gas tube and described blast pipe road is all 1;
2 main gas blowout mouths that are connected with burner hearth in the end setting of described main gas tube, 2 weary gas blowout mouths that are connected with burner hearth in the end setting in described blast pipe road.
3. device as claimed in claim 2, is characterized in that:
The quantity of described Secondary Air pipeline is 1; 2 overfire air ports that are connected with burner hearth in the end setting of described Secondary Air pipeline.
4. device as claimed in claim 1, is characterized in that:
In described main gas tube He on described blast pipe road, valving is all set.
5. device as claimed in claim 1, is characterized in that:
Described Secondary Air pipeline is by secondary air box device air distribution.
6. device as claimed in claim 1, is characterized in that:
Described main gas blowout mouth, described weary gas blowout mouth and described overfire air port be shaped as circle or rectangle.
7. device as claimed in claim 1, is characterized in that:
Also comprise: Pulverized Coal Concentration device;
Described Pulverized Coal Concentration device is connected with described coal powder light-dark separation device by described pulverized coal channel.
8. a W flame boiler, is characterized in that:
Comprise the burner of one or more W flame boilers as described in claim 1 to 7 any one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320878019.7U CN203656910U (en) | 2013-12-30 | 2013-12-30 | W flame boiler and combustion device thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320878019.7U CN203656910U (en) | 2013-12-30 | 2013-12-30 | W flame boiler and combustion device thereof |
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| CN203656910U true CN203656910U (en) | 2014-06-18 |
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| CN201320878019.7U Active CN203656910U (en) | 2013-12-30 | 2013-12-30 | W flame boiler and combustion device thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104748107A (en) * | 2013-12-30 | 2015-07-01 | 烟台龙源电力技术股份有限公司 | Combustion device of W flame boiler and W flame boiler |
| CN113883501A (en) * | 2021-11-01 | 2022-01-04 | 哈尔滨工业大学 | Boiler peak shaving method of W flame boiler for flexibly shaving peak by double-layer coal bunker |
-
2013
- 2013-12-30 CN CN201320878019.7U patent/CN203656910U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104748107A (en) * | 2013-12-30 | 2015-07-01 | 烟台龙源电力技术股份有限公司 | Combustion device of W flame boiler and W flame boiler |
| CN113883501A (en) * | 2021-11-01 | 2022-01-04 | 哈尔滨工业大学 | Boiler peak shaving method of W flame boiler for flexibly shaving peak by double-layer coal bunker |
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