CN202660539U - W-type flame boiler pulverized coal combustion device - Google Patents
W-type flame boiler pulverized coal combustion device Download PDFInfo
- Publication number
- CN202660539U CN202660539U CN 201220302872 CN201220302872U CN202660539U CN 202660539 U CN202660539 U CN 202660539U CN 201220302872 CN201220302872 CN 201220302872 CN 201220302872 U CN201220302872 U CN 201220302872U CN 202660539 U CN202660539 U CN 202660539U
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- Prior art keywords
- lower hearth
- hearth
- communicated
- pulverized coal
- blast pipe
- Prior art date
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- 239000003245 coal Substances 0.000 title claims abstract description 38
- 238000002485 combustion reaction Methods 0.000 title abstract description 10
- 239000000843 powder Substances 0.000 claims description 12
- 239000007789 gas Substances 0.000 abstract description 16
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 abstract description 11
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 230000000452 restraining effect Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- 239000007921 spray Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 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
- 239000002817 coal dust Substances 0.000 description 1
- 238000004939 coking Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 230000003134 recirculating effect Effects 0.000 description 1
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- Combustion Of Fluid Fuel (AREA)
Abstract
The utility model relates to a W-type flame boiler pulverized coal combustion device which comprises an upper hearth, a lower hearth, a enrichment-type pulverized coal burner, an exhaust gas pipe and a classification wind pipe. A furnace arch is arranged between the upper hearth and the lower hearth, and a nozzle of the pulverized coal burner penetrates through the furnace arch and is communicated with the lower hearth. An inlet of the exhaust gas pipe is communicated with the pulverized coal burner, and a nozzle of the classification wind pipe is communicated with the lower portion of the lower hearth. A nozzle of the exhaust gas pipe is arranged on the lower portion of the lower hearth, and is communicated with the lower portion of the lower hearth. The W-type flame boiler pulverized coal combustion device can prevent the fact that exhaust gas is untimely mixed with descending main jet flow of a furnace arch area, increases the undershoot depth of the main jet flow, improves the flame fullness degree of the lower hearth, prolongs the standing time of flame in the lower hearth, avoids scorification caused by local overhigh temperature, and is beneficial for restraining the generation of high-temperature nitrogen oxides (NOX) at the same time.
Description
Technical field
The utility model relates to a kind of coal powder burner, particularly relates to a kind of W type flame boiler coal powder burner.
Background technology
China is a developing country take coal as main energy sources, and coal resources account for about 75% of China's production of energy and total quantity consumed.Coal can produce a large amount of pollutants in combustion process, (hereinafter " nitrogen oxide " all uses " NO to nitrogen oxide wherein
X" expression) to environmental hazard greatly and be difficult to process.From the beginning of the eighties in last century, China begins to introduce W type flame boiler coal powder burner and manufacturing technology thereof, and this burner has obvious advantage when using the relatively poor ature of coal of the combustibilities such as anthracite, but its NO
XDischarge capacity substantially all at 1000mg/Nm
3Above, have in addition up to (1500～1800) mg/Nm
3, far above the emission level of conventional combustion mode boiler, what be difficult to satisfy national regulation must not be higher than 200mg/Nm
3Discharge standard.
As shown in Figure 1, Figure 1 shows that (among the figure: burner has only been drawn rear wall part for the partial structurtes schematic diagram of existing a kind of W type flame boiler coal powder burner, front wall is for being symmetrical arranged), comprise that upper furnace 1, lower hearth 2, chimney arch 3, concentrated type coal burner are (such as concentrated type EI-XCL coal burner) 4, wind pipelines 5, blast pipe road 6 and classification wind pipelines 7.Wherein, chimney arch 3 is between upper furnace 1 and lower hearth 2, and the spout of concentrated type coal burner 4 runs through chimney arch 3 and is communicated with lower hearth 2, thereby the flame of concentrated type coal burner 4 ejections can, pour the upper area of lower hearth 2 down.The entrance of concentrated type coal burner 4 is communicated with a wind pipeline 5.The middle part of the entrance in blast pipe road 6 and concentrated type coal burner 4 is communicated with, the spout in blast pipe road 6 is positioned at the middle and upper part of lower hearth 2, and direction is tilted to down, and therefore spout is regional from the horizontal by the middle and upper part that certain angle sprays into lower hearth 1 downwards thus for weary gas.The spout of classification wind pipeline 7 is communicated with the bottom of lower hearth 2, and direction is tilted to down, and classification wind sprays into the lower area of lower hearth 1 downwards from the horizontal by certain angle via the spout of classification wind pipeline 7.
The basic conception of W type flame combustion mode is: the suitable undershoot of flame at chimney arch 3 places of front wall and rear wall, unfolded fully, mutually not collision, and, heat load distribution is even in the burner hearth, the flame full level is high, and combustion centre maintains the center of lower hearth 2 under various loads, and the unlikely upper furnace 1 that floats to.
Yet, because the nozzle exit area in the blast pipe road 6 of above-mentioned W type flame boiler coal powder burner is nearer apart from the spout of the concentrated type coal burner 4 in chimney arch 3 zones, its result who directly causes is: weary gas too early mixes and promotes it with the descending power stream in chimney arch 3 zones and turns round too early up, add the buoyancy of flame, thereby it is too shallow to make flame enter the degree of depth of lower hearth 2, has departed from the basic conception of W type flame combustion mode.And flame is turned rapidly around the corner, and maximum temperature appears at furnace roof top, thereby causes the local temperature of boiler too high, and then causes the too high slagging scorification that causes of local temperature, and the utmost point is beneficial to high temperature modification NO
XGeneration, cause NO
XDischarge capacity is higher.
On this basis, because wind speed and the concentration of the weary gas of 6 ejections are all on the low side from the blast pipe road, weary gas is difficult to enter into the high-temperature region of the flame kernel of lower hearth 2, thereby cause the loss of uncombusted coal excessive, also destroyed simultaneously the recirculating zone of concentrated type coal burner 4, the smooth combustion of burner region has been caused certain influence.
The utility model content
The purpose of this utility model is to propose a kind of slagging scorification and NO of being difficult for
XThe W type flame boiler coal powder burner that growing amount is less.
For achieving the above object, the utility model provides a kind of W type flame boiler coal powder burner, comprises upper furnace, lower hearth, concentrated type coal burner, blast pipe road and classification wind pipeline; Wherein, be provided with chimney arch between described upper furnace and the described lower hearth, the spout of described concentrated type coal burner runs through described chimney arch and is communicated with described lower hearth; The entrance in described blast pipe road is communicated with described concentrated type coal burner, and the spout of described classification wind pipeline is communicated with the bottom of described lower hearth; It is characterized in that: the spout in described blast pipe road is arranged on the bottom of described lower hearth, and is communicated with the bottom of described lower hearth.
Further, the spout in described blast pipe road is arranged on the position of the spout of described classification wind pipeline.
Further, described blast pipe road inserts in the described classification wind pipeline.
Further, described blast pipe road and described classification wind pipeline are and are horizontally disposed with.
Based on technique scheme, the utility model moves down the nozzle exit area in blast pipe road, make the weary gas of ejection can directly enter into the lower area of lower hearth, therefore can avoid weary gas to mix with the descending power stream in chimney arch zone too early, thereby increased the undershoot degree of depth of descending power stream, improved the flame degree of filling of lower hearth, increased the time of staying of flame in lower hearth, and then avoid the slagging scorification that causes because local temperature is too high, be conducive to simultaneously suppress high temperature NO
XGeneration.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present utility model, consists of the application's a part, and illustrative examples of the present utility model and explanation thereof are used for explaining the utility model, do not consist of improper restriction of the present utility model.In the accompanying drawings:
Fig. 1 is the partial structurtes schematic diagram of existing W type flame boiler coal powder burner;
Fig. 2 is an implementation of W type flame boiler coal powder burner of the present utility model
The partial structurtes schematic diagram of example;
Fig. 3 is the partial enlarged drawing of A section among Fig. 2.
The specific embodiment
Below by drawings and Examples, the technical solution of the utility model is described in further detail.
As shown in Figure 2, shown in Fig. 2 is the partial structurtes schematic diagram of a specific embodiment of W type flame boiler coal powder burner in the utility model, same as the prior art, it comprises upper furnace 1, lower hearth 2, chimney arch 3, concentrated type coal burner 4, wind pipeline 5, blast pipe road 6 and a classification wind pipeline 7 equally.But, the utility model moves down the nozzle exit area in blast pipe road 6, mix with the descending power stream in chimney arch 3 zones too early from the weary gas of the spout in blast pipe road 6 ejection avoiding, be convenient to increase the undershoot degree of depth of descending power stream, improve the flame degree of filling of lower hearth 2, increase the time of staying of flame in lower hearth 2, and then be beneficial to inhibition high temperature NO
XGeneration.
In above-described embodiment, the spout in blast pipe road 6 is displaced downwardly to the position of the spout of classification wind pipeline 7, makes as much as possible weary gas blowout enter the flame kernel of lower hearth 2.
Such as Fig. 2, shown in Figure 3, in the various embodiments described above, the utility model is offered porose at the sidewall of classification wind pipeline 7, to insert blast pipe road 6, at this moment, classification wind pipeline 7 surrounds blast pipe road 6, and the space between blast pipe road 6 and the classification wind pipeline 7 forms annular space, and is from the classification wind of classification wind pipeline 7 that this annular space is mobile.When classification wind and weary gas spray into towards lower hearth 2 together, classification wind can be used as the surrounding air of weary gas, weary like this gas not only easily catches fire, and can be by classification wind speed degree the large and strong advantage of penetration power, enter at an easy rate the high-temperature region of lower hearth flame kernel, thereby increased the burn-off rate of coal dust, and then improved the smooth combustion of burner hearth.
In the various embodiments described above, because blast pipe road 6 has inserted classification wind pipeline 7, be tilted to down if the spout of blast pipe road 6 and classification wind pipeline 7 still is left, weary gas can be by classification wind speed degree the large and strong advantage of penetration power, may be washed into the water-cooling wall (water-cooling wall is not shown in the drawings) at furnace hopper place in the lower area of lower hearth 1, the local temperature that causes water-cooling wall is too high, cause coking, therefore, had better be with blast pipe road 6 and the 7 along continuous straight runs settings of classification wind pipeline.
Should be noted that at last: above embodiment is only in order to illustrate that the technical solution of the utility model is not intended to limit; Although with reference to preferred embodiment the utility model is had been described in detail, those of ordinary skill in the field are to be understood that: still can make amendment or the part technical characterictic is equal to replacement the specific embodiment of the present utility model; And not breaking away from the spirit of technical solutions of the utility model, it all should be encompassed in the middle of the technical scheme scope that the utility model asks for protection.
Claims (4)
1. a W type flame boiler coal powder burner comprises upper furnace, lower hearth, concentrated type coal burner, blast pipe road and classification wind pipeline; Wherein, be provided with chimney arch between described upper furnace and the described lower hearth, the spout of described concentrated type coal burner runs through described chimney arch and is communicated with described lower hearth; The entrance in described blast pipe road is communicated with described concentrated type coal burner, and the spout of described classification wind pipeline is communicated with the bottom of described lower hearth; It is characterized in that: the spout in described blast pipe road is arranged on the bottom of described lower hearth, and is communicated with the bottom of described lower hearth.
2. device as claimed in claim 1, it is characterized in that: the spout in described blast pipe road is arranged on the position of the spout of described classification wind pipeline.
3. device as claimed in claim 1 or 2, it is characterized in that: described blast pipe road inserts in the described classification wind pipeline.
4. device as claimed in claim 3, it is characterized in that: described blast pipe road and described classification wind pipeline are and are horizontally disposed with.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220302872 CN202660539U (en) | 2012-06-27 | 2012-06-27 | W-type flame boiler pulverized coal combustion device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220302872 CN202660539U (en) | 2012-06-27 | 2012-06-27 | W-type flame boiler pulverized coal combustion device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202660539U true CN202660539U (en) | 2013-01-09 |
Family
ID=47455445
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220302872 Expired - Fee Related CN202660539U (en) | 2012-06-27 | 2012-06-27 | W-type flame boiler pulverized coal combustion device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202660539U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105864751B (en) * | 2015-01-22 | 2018-07-06 | 烟台龙源电力技术股份有限公司 | The burner of W flame boiler and W flame boiler |
| CN110645569A (en) * | 2019-11-01 | 2020-01-03 | 国电南京电力试验研究有限公司 | Combustion system and combustion method for improving flexibility of coal types of W flame boiler |
-
2012
- 2012-06-27 CN CN 201220302872 patent/CN202660539U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105864751B (en) * | 2015-01-22 | 2018-07-06 | 烟台龙源电力技术股份有限公司 | The burner of W flame boiler and W flame boiler |
| CN110645569A (en) * | 2019-11-01 | 2020-01-03 | 国电南京电力试验研究有限公司 | Combustion system and combustion method for improving flexibility of coal types of W flame boiler |
| CN110645569B (en) * | 2019-11-01 | 2023-10-24 | 国能南京电力试验研究有限公司 | Combustion system and combustion method for improving flexibility of W-flame boiler coal types |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| 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: 20130109 Termination date: 20210627 |