CN206112931U - Overgrate air gas boiler combustor - Google Patents
Overgrate air gas boiler combustor Download PDFInfo
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- CN206112931U CN206112931U CN201621055342.4U CN201621055342U CN206112931U CN 206112931 U CN206112931 U CN 206112931U CN 201621055342 U CN201621055342 U CN 201621055342U CN 206112931 U CN206112931 U CN 206112931U
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Abstract
The utility model relates to a configuration method of overgrate air gas boiler combustor and overgrate air will be solved gas boiler and reduce the NOx emission simultaneously, does not reduce boiler efficiency's technical problem, belongs to gas boiler and falls row technical field. Its characterized in that: the furnace inner chamber divide into primary combustion zone, overgrate air inlet zone and burn -out zone from the gas combustion ware beginning along flue gas flow direction in proper order, primary combustion zone is supplied with by the gas combustion ware apart from 0~1 meter gas combustion ware, 70%~95% the amount of wind, the overgrate air inlet zone has a plurality ofly and overgrate air spout overgrate air conveyer pipe pipe connection apart from 1~9 meter gas combustion ware, furnace oven overhead, and 5%~30% the amount of wind passes through the overgrate air spout and supplies with. The advantage is: arrange the overgrate air spout in the low reaches of gas combustion ware, reduced primary combustion zone's combustion temperature, made still originality atmosphere of primary combustion zone, suppressed heating power type NOx and fuel type NOx's formation, the overgrate air has been guaranteed not reduce boiler efficiency by gaseous fuel complete combustion.
Description
Technical field
This utility model is related to boiler and burner integrally using secondary wind Concentration-decentration Split Combustion, more particularly to a kind of secondary
The collocation method of wind burner for gas boiler and secondary wind, reduces gas fired-boiler NOx emission, the low-nitrogen discharged technology of category gas fired-boiler
Field.
Background technology
With becoming increasingly conspicuous for environmental problem, requirement of the country to energy-saving and emission-reduction is more and more stricter, to boiler atmospheric pollution
The requirement more and more higher of thing emission limit.Boiler factory is one after another by the way of low nitrogen burning transformation, and the initial ejection for reducing NOx is dense
Degree.As far as possible boiler is transformed by low-NO_x combustion technology so as to the requirement being up to state standards, if also failing to reach required
Emission limit, then need to realize qualified discharge by the rear out of stock mode such as SCR or SNCR, but thus produces cost of investment increase, fortune
Row expense is improved, later maintenance expense is higher；And low nitrogen burning transformation is greatly reduced into SCR or SNCR reaction zones NOx's
Inlet concentration, can save the operating cost of many denitrations.
Low NO classification dense-dilute burner combustion technology encounters bottleneck on NOx drop rows, needs Bian ancillary techniques,
At the same time such as flue gas recirculating technique, super emulsifying technology etc. can all reduce pot realizing lower NOx emission
The thermal efficiency of stove.Bias combustion is the low nitrogen burning mode that a kind of effective control NOx is generated, and can effectively control thermal NO x
With the generation of fuel type NOx, and it is widely used in burner, i.e. the burner of gas fired-boiler is using fuel gas injection is shunted
With air classification mode, artificially cause fuel gun aperture different, so that the fuel quantity that fuel gun is ejected is not quite similar, together
When, air inhomogeneities around fuel form the deep or light region of burning.But because boiler and burner adheres to difference separately on market
Unit, almost not incite somebody to action both（Boiler and burner）Consider to reduce NOx emission as an entirety, therefore effect is limited.
Burner and boiler furnace are considered as into an entirety to consider, the classification on boiler is input into secondary wind, realizes deep or light combustion
Burn, further reduce the low nitrogen technical method of the NOx emission of gas fired-boiler, be the class of the effort research of numerous scientific and technical personnel in the industry
Topic and the target captured.
The content of the invention
The purpose of this utility model is：The collocation method of a kind of secondary wind burner for gas boiler and secondary wind is provided, is dropped
The temperature of low combustion zone, further reduces the generation of nitrogen oxides, while not reducing boiler thermal output.
The technical solution of the utility model is：A kind of secondary wind burner for gas boiler, including burner hearth, gas burner,
Overfire air port, secondary wind delivery pipe, it is characterised in that：The gas burner be placed in the front wall of the burner hearth or rear wall or
Both walls or furnace roof, the burner hearth cavity begins from gas burner, and along flow of flue gas direction main burning area, secondary is divided into
Wind inlet zone and burning-out zone, are equipped with multiple conveying pipelines with the secondary wind and connect on the burner hearth furnace wall in the secondary air jet area
Connect the overfire air port for communicating.
The burner hearth cavity is from gas burner beginning, the main burning area set up separately successively along flow of flue gas direction and combustion
Air burner distance is 0～1 meter, and the secondary air jet area is 1～9 meter with gas burner distance.
In the secondary air jet area, the overfire air port along flow of flue gas direction layering arrange, per layer be disposed with it is many
Individual overfire air port.
The secondary wind collocation method of the secondary wind burner for gas boiler：Total blast volume needed for burning in the burner hearth
70%～95% is supplied by main burning area gas burner, and 5%～30% is supplied by the overfire air port in the secondary air jet area
Give.
Good effect of the present utility model is：By the combustion-supporting air quantity needed for burning（That is air quantity）It is divided into two-stage and sends into stove
Thorax, 70%～95% air quantity is supplied by the gas burner in the burner hearth, and 5%～30% air quantity is sprayed by the secondary wind
Mouth supply, fuel first burns under the conditions of main burning area fuel-rich so that burning velocity and temperature are reduced, and are delayed burned
Journey, and generate the material with reproducibility such as CO, H2Deng a large amount of nitrogen-containing groups are further anti-with NOx in reducing atmosphere
Should, NOx is improve to N2Conversion ratio, it is suppressed that the generation of NOx, reduce growing amounts of the NOx in this region.Secondary wind is sprayed
It is reburning zone to penetrate area, and remaining air needed for burning is sent into into burner hearth by being arranged in the overfire air port of burner hearth furnace wall.Feeding
After secondary wind, reburning zone becomes oxygen-enriched combusting area.Fuel proceeds burning in reburning zone and NOx is further reduced.
Though now air capacity is more, because flame temperature is low, final NOx generation amount is little, while the infeed of air makes unburned gas
The abundant after-flame of fuel, it is ensured that the burning completely of gaseous fuel, the yield of CO is almost nil, final stove inner second air fractional combustion
NOx generation amount can be made to reduce by 30～50%.
Description of the drawings
Below in conjunction with the accompanying drawings explanation and embodiment are further illustrated to this utility model.
Fig. 1 is the boiler furnace structural representation of embodiment 1（Π type boiler furnaces）：
Fig. 2 is the boiler furnace structural representation of embodiment 2（D type boiler furnaces）；
Fig. 3 is the boiler furnace structural representation of embodiment 3（U-shaped boiler furnace）.
In figure：1- burner hearths：2- gas burners；2a- main burnings area；3- overfire air ports；3a- secondary air jets area（It is rich
Oxygen combustion zone）；4- overfire air ports configure section；4a- burning-out zones；5- secondary wind delivery pipes.
Specific embodiment
Below with three kinds common on the market different type of furnaces：Π type boilers（Fig. 1）, D type boilers（Fig. 2）With U-shaped boiler（Figure
3）For embodiment, this utility model is described in further detail with reference to accompanying drawing, in order to make ordinary skill
Personnel are understood that and implement this utility model, are not to limit protection domain of the present utility model.It should be appreciated that on market
Boiler shape is not limited to these three.It is every to adopt and this utility model analog structure and its similar change, this reality all should be listed in
With new protection domain.The direction of arrow is flow of flue gas direction in figure.
The gas burner quantity can have multiple stage, different according to the type of furnace, arrange on demand.
From diagram, the collocation method of a kind of secondary wind burner for gas boiler and secondary wind, including burner hearth 1, combustion gas
Burner 2, overfire air port 3, secondary wind delivery pipe 5, it is characterised in that：Gas burner 2（Arrange on demand unlimited）Cloth
Put on the front wall or rear wall or both walls or furnace roof of burner hearth 1, the inner chamber of the burner hearth 1 begins from gas burner 2, along flue gas
Flow direction is divided into main burning area 2a, secondary air jet area 3a and burning-out zone 4a, the burner hearth of the secondary air jet area 3a
Multiple overfire air ports 3 for being connected with the pipeline of secondary wind delivery pipe 5 and communicating are equipped with furnace wall.70%～95% air quantity passes through
Gas burner 2 feeds burner hearth 1, and overfire air port 3 is located at the downstream of burner（Along cigarette airflow direction）Apart from gas burner 1
In the range of～9 meters of secondary air jet area 3a, along flue gas flow arrangement burner hearth 1 surrounding（In theory, actually because of
Field condition is limited, it may not be possible to which surrounding is arranged）, 1～6 layer of arrangement, 1～25 overfire air port 3 of per layer of arrangement, 5%～
30% air quantity sends into each overfire air port 3 by secondary wind delivery pipe 5, final uniform penetrating burner hearth 1.
As shown in figure 1, the flue gas trend of Π type boilers is furnace bottom to furnace roof, i.e., from the bottom up.The two of Π types boiler furnace 1
Secondary wind, is arranged in the surrounding of burner hearth 1, is in the range of the 1-9 rice of the top of gas burner 2, it is illustrated that, 1 layer of secondary wind is set
Spout configures section 4, arranges 8 overfire air ports 3, and secondary wind is delivered to each overfire air port by secondary wind delivery pipe 5
3, it is uniform to spray into the abundant after-flame of the inner unburnt fuel of burner hearth 1 in burner hearth 1.
As shown in Figure 2 from stokehold toward furnace rear, i.e., from left to right the flue gas trend of D types boiler furnace 1 is.D types boiler furnace 1
Gas burner 2 be arranged at the front wall of D types boiler 1, overfire air port 3 is arranged in D types boiler furnace 1 in boiler for deeply side
Upwards（Flue gas direction）In the range of 1～9 meter of burner, overfire air port configures section 4 by 2 layers of arrangement, and per layer is arranged 4
Overfire air port 3.Secondary wind is delivered to each overfire air port 3 and uniformly sprays in burner hearth, by residue by secondary wind delivery pipe 5
The abundant after-flame of unburnt fuel in burner hearth.
As shown in figure 3, the gas burner 2 of U-shaped boiler is arranged in furnace roof, flue gas trend is i.e. from upper from furnace roof to furnace bottom
Down.The overfire air port 3 of U-shaped boiler furnace 1, is arranged in the surrounding of burner hearth 1,1～9 meter of the model below gas burner 2
In enclosing, 1 layer of arrangement on every layer of overfire air port configuration section 4, arranges 8 overfire air ports 3, and secondary wind is defeated by secondary wind
Pipe 5 is sent to be delivered to each overfire air port 3.Secondary wind is uniformly sprayed in burner hearth 1 by overfire air port 3, and burner hearth 1 is inner unburned
The abundant after-flame of most fuel.
This utility model provides a kind of new method of gas fired-boiler low nitrogen burning transformation, in the downstream of gas burner,
Arrangement overfire air port 3, secondary wind reduces the ignition temperature of primary combustion zone, and has manufactured the reproducibility atmosphere of primary combustion zone
Enclose, greatly inhibit the generation of thermal NO x and fuel type NOx.The arrangement of secondary wind ensures that gaseous fuel burns completely, no
Reduce boiler thermal output.
Claims (3)
1. a kind of secondary wind burner for gas boiler, including burner hearth, gas burner, overfire air port, secondary wind delivery pipe, its
It is characterised by：The gas burner is placed in the front wall of the burner hearth or rear wall or both walls or furnace roof, the burner hearth cavity
Begin from gas burner, along flow of flue gas direction main burning area, secondary air jet area and burning-out zone are divided into, it is described secondary
Multiple overfire air ports for being connected with secondary wind conveying pipeline and communicating are equipped with the burner hearth furnace wall of wind inlet zone.
2. a kind of secondary wind burner for gas boiler according to claim 1, it is characterised in that：The burner hearth cavity is from combustion gas
Burner begins, and the main burning area and gas burner distance set up separately successively along flow of flue gas direction is 0～1 meter,
The secondary air jet area is 1～9 meter with gas burner distance.
3. a kind of secondary wind burner for gas boiler according to claim 1, it is characterised in that：The secondary air jet area
Interior, along flow of flue gas direction, layering is arranged the overfire air port, and per layer is provided with multiple overfire air ports.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621055342.4U CN206112931U (en) | 2016-09-14 | 2016-09-14 | Overgrate air gas boiler combustor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621055342.4U CN206112931U (en) | 2016-09-14 | 2016-09-14 | Overgrate air gas boiler combustor |
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| Publication Number | Publication Date |
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| CN206112931U true CN206112931U (en) | 2017-04-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621055342.4U Active CN206112931U (en) | 2016-09-14 | 2016-09-14 | Overgrate air gas boiler combustor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106439815A (en) * | 2016-09-14 | 2017-02-22 | 上海华之邦科技股份有限公司 | Secondary air gas-fired boiler combustor and configuration method of secondary air |
| CN108224420A (en) * | 2018-03-05 | 2018-06-29 | 上海华之邦科技股份有限公司 | A kind of gas fired-boiler Secondary Air coupled mode low NOx combustion system |
-
2016
- 2016-09-14 CN CN201621055342.4U patent/CN206112931U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106439815A (en) * | 2016-09-14 | 2017-02-22 | 上海华之邦科技股份有限公司 | Secondary air gas-fired boiler combustor and configuration method of secondary air |
| CN108224420A (en) * | 2018-03-05 | 2018-06-29 | 上海华之邦科技股份有限公司 | A kind of gas fired-boiler Secondary Air coupled mode low NOx combustion system |
| CN108224420B (en) * | 2018-03-05 | 2024-04-26 | 上海博士高环保科技有限公司 | Secondary air coupling type low NOx combustion system of gas boiler |
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