CN205227378U - Annular overgrate air device - Google Patents
Annular overgrate air device Download PDFInfo
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- CN205227378U CN205227378U CN201520877405.3U CN201520877405U CN205227378U CN 205227378 U CN205227378 U CN 205227378U CN 201520877405 U CN201520877405 U CN 201520877405U CN 205227378 U CN205227378 U CN 205227378U
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- secondary air
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- air
- burner hearth
- air channel
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Abstract
The utility model provides an annular overgrate air device, including the female pipe of overgrate air, first branch pipe of overgrate air and annular secondary air channel, the first branch pipe of overgrate air links to each other with female pipe of overgrate air and annular secondary air channel respectively, the annular secondary air channel encircles and sets up in the outside of brickwork, and be linked together with furnace, thereby introduce the overgrate air edgewise furnace's inside, can guarantee the overgrate air amount of wind of high -alkali buggy ignition point needs, avoid increasing the air quantity around the wind buggy one time, guarantee the ignition point of high -alkali buggy, make high -alkali buggy can fire the cinder completely in the primary zone, reduce furnace exit's gas temperature, it stains to alleviate the lime -ash, the coking phenomenon.
Description
Technical field
The utility model relates to high-alkali coal-burning facility technical field, particularly relates to a kind of annular overfire air device.
Background technology
The high-alkali coal in Xinjiang is mainly distributed in area, accurate east, and " accurate east " refers to the strip of Junggar Basin, Xinjiang, china east from Fukang City to Morikazak Autonomous County, and thing is about 220 kilometers.Accurate eastern coalfield resources reserves reach 3,900 hundred million tons, and accumulative at present to verify coal resources reserves be 2,136 hundred million tons, are the maximum at present self-contained coalfields of China.By the restriction of Urumchi periphery coal resources, the power plant of the accurate eastern coal of the built non-usage in increasing Xinjiang starts to mix burns high-alkali coal, and increasing new power plant construction is then direct using the eastern coal of standard as design coal.
Existing part boiler is that the coal burner spout by being arranged on roof of the furnace carries high-alkali coal dust in burner hearth, and by the burner overfire air port that is set in coal burner spout outside to feeding secondary wind in burner hearth, to make high-alkali coal dust in burner hearth combustion.But concerning burner hearth high-temperature flue gas and furnace wall, the Secondary Air sprayed into is low-temperature receiver medium, Secondary Air all sprays from burner overfire air port, First air coal dust ambient air amount can be increased, increase the air capacity of heat absorption in the high-alkali coal powder ignition stage, the ignition point of coal dust will be affected like this.And when after high-alkali coal powder ignition, the Secondary Air sprayed into due to burner overfire air port is at end, then the secondary air flow that needs of coal powder ignition point is not enough, thus causes coal dust to burn, and furnace outlet gas temperature is too high, on tube panel, lime-ash stains, coking is serious.
Therefore, a kind of annular overfire air device is needed badly to solve the problems of the technologies described above.
Utility model content
The utility model, for above shortcomings in prior art, provides a kind of annular overfire air device, cannot after-flame in order to solve high-alkali coal dust, the problem that lime-ash stains, coking phenomenon is serious.
The utility model, for solving the problems of the technologies described above, adopts following technical scheme:
The utility model provides a kind of annular overfire air device, comprise Secondary Air mother pipe, Secondary Air first arm and annular secondary air channel, Secondary Air first arm is managed with Secondary Air mother respectively and is connected with annular secondary air channel, and annular secondary air channel around the outside being arranged at furnace wall, and is connected with burner hearth.
Preferably, described annular secondary air channel is hollow, parallel respectively with the four sides of furnace wall.
Preferably, be connected between described annular secondary air channel with the air inlet of each of furnace wall by secondary air intake pipe, the Secondary Air in annular secondary air channel can be delivered to burner hearth by described secondary air intake pipe.
Preferably, described secondary air intake pipe is provided with the valve for regulating the Secondary Air air quantity entering burner hearth.
Preferably, described annular secondary air channel is arranged at the coking section of burner hearth, and described annular secondary air channel horizontal circle is arranged at the outside of furnace wall.
Preferably, described annular secondary air channel is arranged at the middle part of burner hearth coking section.
Further, described device also comprises Secondary Air second arm, and one end of Secondary Air second arm is managed with described Secondary Air mother and is connected, and the other end is connected with the burner overfire air port being positioned at roof of the furnace, and Secondary Air second arm is provided with burner.
The utility model has following beneficial effect:
The utility model is by the arranged outside annular overfire air device at furnace wall, annular secondary air channel is connected by female pipe of Secondary Air first arm and Secondary Air, and be connected with burner hearth, thus Secondary Air is introduced from the side the inside of burner hearth, the Secondary Air air quantity that high-alkali coal powder ignition point needs can be ensured, avoid increasing First air coal dust ambient air amount, ensure the ignition point of high-alkali coal dust, high-alkali coal dust can be burnt completely in primary zone, reduce the cigarette temperature of furnace outlet, alleviate lime-ash contamination, coking phenomenon.
Accompanying drawing explanation
The installation diagram of the annular overfire air device that Fig. 1 provides for the utility model embodiment;
The top view of the annular overfire air device that Fig. 2 provides for the utility model embodiment.
Marginal data:
1, Secondary Air first arm 2, annular secondary air channel 3, furnace wall
4, secondary air intake pipe 5, burner hearth 6, Secondary Air second arm
31, air inlet 41, valve 51, coking section
52, section 53, burner overfire air port is stain
Detailed description of the invention
For making those skilled in the art understand the technical solution of the utility model better, below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
The utility model provides a kind of annular overfire air device, by changing primary zone Secondary Air air supply position and air output, ensures high-alkali coal dust Thorough combustion, alleviates lime-ash contamination, coking phenomenon.
The structure of annular overfire air device of the present utility model is described in detail below in conjunction with Fig. 1 and Fig. 2.As shown in Figure 1-2, a kind of annular overfire air device comprises: Secondary Air mother's pipe (not illustrating in figure), Secondary Air first arm 1 and annular secondary air channel 2, Secondary Air first arm 1 is managed with Secondary Air mother respectively and is connected with annular secondary air channel 2, annular secondary air channel 2 around the outside being arranged at furnace wall 3, and is connected with burner hearth 5.
The utility model is by the arranged outside annular overfire air device at furnace wall, annular secondary air channel 2 is connected by female pipe of Secondary Air first arm 1 and Secondary Air, and be connected with burner hearth 5, thus Secondary Air is introduced from the side the inside of burner hearth 5, the Secondary Air air quantity that high-alkali coal powder ignition point needs can be ensured, avoid increasing First air coal dust ambient air amount, ensure the ignition point of high-alkali coal dust, high-alkali coal dust can be burnt completely in primary zone, reduce the cigarette temperature of furnace outlet, alleviate lime-ash contamination, coking phenomenon.
Annular secondary air channel 2, around the outside being arranged at furnace wall 3, can be hollow or circle, and preferably, as shown in Figure 2, annular secondary air channel 2 is in hollow, and parallel respectively with the four sides of furnace wall 3, the annular secondary air channel 2 of hollow is installed, it is more convenient to use.
Preferably, each face of furnace wall 3 is respectively arranged with air inlet 31, and be connected by secondary air intake pipe 4 between annular secondary air channel 2 with each air inlet 31, the Secondary Air in annular secondary air channel 2 can be delivered in burner hearth 5 by secondary air intake pipe 4.
As shown in Figure 2, each face of furnace wall 3 is respectively arranged with two air inlets 31, and annular secondary air channel 2 corresponding with furnace wall 3 four sides is respectively connected with the air inlet 31 on each furnace wall 3, so that balanced ventilation by two secondary air intake pipes 4.
Preferably, secondary air intake pipe 4 is provided with valve 41, valve 41 is for regulating the Secondary Air air quantity entering burner hearth 5.
By arranging valve 41 on secondary air intake pipe 4, can regulate respectively the air quantity of the Secondary Air from burner hearth 5 side feed, thus the intake volume of Secondary Air can be controlled according to the combustion case of coal dust in burner hearth, ensure coal dust Thorough combustion.
As shown in Figure 1, burner hearth 5 comprises coking section 51 and stains section 52, and coking section 51 is the primary zone of coal dust firing.Annular secondary air channel 2 can be arranged on coking section 51, and the horizontal circle of annular secondary air channel 2 is arranged at the outside of furnace wall 3.Preferably, annular secondary air channel 2 can be arranged on the middle part of the coking section 51 of burner hearth.
Further, as shown in Figure 1, annular overfire air device can also comprise Secondary Air second arm 6, one end of Secondary Air second arm 6 is managed with described Secondary Air mother and is connected, the other end is connected with the burner overfire air port 53 being positioned at roof of the furnace, Secondary Air second arm 6 is provided with burner (not illustrating in figure).
Preferably, Secondary Air second arm 6 also can be provided with valve, in order to regulate the air quantity of the Secondary Air from roof of the furnace conveying.
High-alkali coal dust brings burner hearth 5 from coal burner spout (not illustrating figure) into by First air, in burner hearth 5, coal dust is subject to entrainmenting etc. to act in very short time to heat up and catching fire of the radiation of burner hearth high temperature furnace wall and high-temperature flue gas, after coal powder ignition, need to supply Secondary Air in time, to provide the air needed for burning.
After pressure fan (not illustrating in figure) starts, cold Secondary Air is delivered to Secondary Air mother pipe after air preheater (not illustrating in figure) heats up, and be divided into two-way by Secondary Air first arm 1 and Secondary Air second arm 6, wherein road warp after burner combustion inputs burner hearth 5 by Secondary Air second arm 6 from the top of burner hearth 5, another road is delivered to annular secondary air channel 2 via Secondary Air first arm 1, burner hearth 5 is inputted from the side of burner hearth 5 by annular secondary air channel 2, part Secondary Air is sent into from burner hearth 5 top, part Secondary Air is sent into from the side of burner hearth 5, avoid burner hearth coking section localized hyperthermia and the slagging scorification caused, achieve Secondary Air classification conveying, reach the effect of air classification, the content of nitrogen oxide in air-introduced machine exiting flue gas can be reduced, reduce atmosphere pollution.Annular secondary air channel 2 encloses around burner hearth 5 one, Secondary Air is sent into primary zone from the surrounding of burner hearth 5, and on secondary air intake pipe 4, be furnished with valve 41 regulating air volume, thus the Secondary Air air quantity distributed from primary zone conveying, reach the object that coal dust burns, slagging scorification and stain phenomenon when alleviating high-alkali coal combustion.
Be understandable that, the illustrative embodiments that above embodiment is only used to principle of the present utility model is described and adopts, but the utility model is not limited thereto.For those skilled in the art, when not departing from spirit of the present utility model and essence, can make various modification and improvement, these modification and improvement are also considered as protection domain of the present utility model.
Claims (7)
1. an annular overfire air device, it is characterized in that, comprise Secondary Air mother pipe, Secondary Air first arm and annular secondary air channel, Secondary Air first arm is managed with Secondary Air mother respectively and is connected with annular secondary air channel, annular secondary air channel around the outside being arranged at furnace wall, and is connected with burner hearth.
2. annular overfire air device as claimed in claim 1, is characterized in that, described annular secondary air channel is hollow, parallel respectively with the four sides of furnace wall.
3. annular overfire air device as claimed in claim 2, it is characterized in that, be connected by secondary air intake pipe between described annular secondary air channel with the air inlet of each of furnace wall, the Secondary Air in annular secondary air channel can be delivered to burner hearth by described secondary air intake pipe.
4. annular overfire air device as claimed in claim 3, is characterized in that, described secondary air intake pipe is provided with the valve for regulating the Secondary Air air quantity entering burner hearth.
5. annular overfire air device as claimed in claim 1, is characterized in that, described annular secondary air channel is arranged at the coking section of burner hearth, and described annular secondary air channel horizontal circle is arranged at the outside of furnace wall.
6. annular overfire air device as claimed in claim 5, is characterized in that, described annular secondary air channel is arranged at the middle part of the coking section of burner hearth.
7. the annular overfire air device as described in any one of claim 1-6, it is characterized in that, described device also comprises Secondary Air second arm, one end of Secondary Air second arm is managed with described Secondary Air mother and is connected, the other end is connected with the burner overfire air port being positioned at roof of the furnace, and Secondary Air second arm is provided with burner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520877405.3U CN205227378U (en) | 2015-11-05 | 2015-11-05 | Annular overgrate air device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520877405.3U CN205227378U (en) | 2015-11-05 | 2015-11-05 | Annular overgrate air device |
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| Publication Number | Publication Date |
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| CN205227378U true CN205227378U (en) | 2016-05-11 |
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| CN201520877405.3U Active CN205227378U (en) | 2015-11-05 | 2015-11-05 | Annular overgrate air device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106052378A (en) * | 2016-06-16 | 2016-10-26 | 中冶长天国际工程有限责任公司 | Low-NOx clean combustion type rotary kiln and combustion control method thereof |
| CN108844071A (en) * | 2018-07-20 | 2018-11-20 | 株洲中车南方环保科技有限公司 | A kind of secondary Small-sized living garbage incinerator for mending wind |
-
2015
- 2015-11-05 CN CN201520877405.3U patent/CN205227378U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106052378A (en) * | 2016-06-16 | 2016-10-26 | 中冶长天国际工程有限责任公司 | Low-NOx clean combustion type rotary kiln and combustion control method thereof |
| CN106052378B (en) * | 2016-06-16 | 2018-07-17 | 中冶长天国际工程有限责任公司 | A kind of low NOxClean burning type rotary kiln and its method for controlling combustion |
| CN108844071A (en) * | 2018-07-20 | 2018-11-20 | 株洲中车南方环保科技有限公司 | A kind of secondary Small-sized living garbage incinerator for mending wind |
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| GR01 | Patent grant |