CN204986979U - High temperature gas recirculation device of high sodium metal coal pi type boiler - Google Patents
High temperature gas recirculation device of high sodium metal coal pi type boiler Download PDFInfo
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- CN204986979U CN204986979U CN201520568446.4U CN201520568446U CN204986979U CN 204986979 U CN204986979 U CN 204986979U CN 201520568446 U CN201520568446 U CN 201520568446U CN 204986979 U CN204986979 U CN 204986979U
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- gas recirculation
- flue
- type boiler
- sodium metal
- boiler furnace
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Abstract
Provided is a high temperature gas recirculation device of high sodium metal coal pi type boiler. Internal power plant boiler serious slagging scorification can appear, stain and the deposition condition under the condition that uses high sodium metal coal. A high temperature gas recirculation device of high sodium metal coal pi type boiler which constitutes and includes: pi type boiler furnace (b) (b) 5 (b) (b), pi type boiler furnace is connected through horizontal gas pass (b) (b) 8 (b) (b) with afterbody flue (b) (b) 9 (b) (b), temperature heating surface has been arranged in pi type boiler furnace outlet and the horizontal gas pass, arranged in the afterbody flue that low temperature receives the hot side, afterbody flue department has dust remover (b) (b) 7 (b) (b), pi type boiler furnace outlet temperature heating surface department has smoke mouthful (b) (b) 1 (b) (a b), the mouth of smoking is connected on one side of gas recirculation flue (b) (b) 2 (b) (b), the expansion joint (b) (b) 3 (b) (b) that gas recirculation flue opposite side passes through on the flue is connected with gas recirculation combustor (b) (b) 4 (b) (b), gas recirculation fan (b) (b) 6 (b) (b) has on the gas recirculation flue. The utility model discloses be applied to the high temperature gas recirculation of high sodium metal coal pi type boiler. (B, )
Description
technical field:
the utility model relates to a kind of high-temperature flue gas EGR of high sodium metal coal Π type boiler.
background technology:
at present, domestic west area has been verified and has been contained very abundant high sodium metal coal resources.Because high sodium metal coal itself has extremely strong slagging scorification, fouling characteristics, when using high sodium metal coal, all can there is serious slagging scorification, contamination and dust stratification situation, badly influencing the safe and stable operation of station boiler in domestic station boiler.In order to use this type of high sodium metal coal, strong slagging scorification that boiler brings because of high sodium coal, contamination and dust stratification situation are alleviated by underload or other method of operation in domestic power plant.But under this mode service condition existing, high sodium coal utilization ratio is very low, and have a strong impact on the development of local coal electricity industry.
summary of the invention:
the purpose of this utility model is to provide a kind of high-temperature flue gas EGR of high sodium metal coal Π type boiler.
above-mentioned object is realized by following technical scheme:
a kind of high-temperature flue gas EGR of high sodium metal coal Π type boiler, its composition comprises: Π type boiler furnace, described Π type boiler furnace is connected by horizontal flue with back-end ductwork, high-temperature surface is furnished with in described Π type boiler furnace outlet and horizontal flue, low temperature heating surface is furnished with in described back-end ductwork, described back-end ductwork place has deduster, described Π type boiler furnace outlet high-temperature surface place has smoking mouth, described smoking mouth is connected with flue gas recirculation flue side, described flue gas recirculation flue opposite side is connected with flue gas recirculation burner by the expansion joint on flue, described flue gas recirculation burner is connected with Π type boiler furnace, described flue gas recirculation flue has gas recirculating fan.
the beneficial effects of the utility model:
1. this smoking mouth being used for the high-temperature flue gas recirculating technique of high sodium metal coal burning boiler of the utility model can according to the needs of actual conditions, be arranged in the fume high-temperature region on boiler furnace top, extract flue gas, the temperature that the temperature of high-temperature flue gas is chosen according to the ash fusion point of ature of coal is also different, generally its flue-gas temperature is a little less than the softening temperature of ature of coal ash fusion point, to prevent the slagging scorification of smoking mouth.This high-temperature flue arrangement is simple, and resistance is less.Be applied to and use on high sodium metal coal Π type boiler, high-temperature flue gas is injected in burner hearth by flue gas recycled burner, the temperature in energy fine tune boiler combustion district, while ensureing the efficiency of combustion of boiler, the alkali metal concn in burner hearth flue gas can also be reduced, while reducing the growing amount of boiler nitrogen oxide like this, significantly can also alleviate the slagging scorification of boiler, contamination and dust stratification situation, ensure boiler while using high sodium metal coal, can at full capacity, safety, stable operation.If this technology is applied on 600MW grade unit, every platform boiler can reduce nitrogen oxide emission about 400 tons/year on the one hand, can also save standard coal about 1,000,000 tons/year on the one hand in addition, effectively alleviate the situation of the domestic energy, environmental stress for country.
accompanying drawing illustrates:
accompanying drawing 1 is structural representation of the present utility model.
detailed description of the invention:
embodiment 1:
a kind of high-temperature flue gas EGR of high sodium metal coal Π type boiler, its composition comprises: Π type boiler furnace 5, described Π type boiler furnace is connected by horizontal flue 8 with back-end ductwork 9, high-temperature surface is furnished with in described Π type boiler furnace outlet and horizontal flue, low temperature heating surface is furnished with in described back-end ductwork, described back-end ductwork place has deduster 7, described Π type boiler furnace outlet high-temperature surface place has smoking mouth 1, described smoking mouth is connected with flue gas recirculation flue 2 side, described flue gas recirculation flue opposite side is connected with flue gas recirculation burner 4 by the expansion joint 3 on flue, described flue gas recirculation burner is connected with Π type boiler furnace, described flue gas recirculation flue has gas recirculating fan 6.
Claims (1)
1. the high-temperature flue gas EGR of one kind high sodium metal coal Π type boiler, its composition comprises: Π type boiler furnace, it is characterized in that: described Π type boiler furnace is connected by horizontal flue with back-end ductwork, high-temperature surface is furnished with in described Π type boiler furnace outlet and horizontal flue, low temperature heating surface is furnished with in described back-end ductwork, described back-end ductwork place has deduster, described Π type boiler furnace outlet high-temperature surface place has smoking mouth, described smoking mouth is connected with flue gas recirculation flue side, described flue gas recirculation flue opposite side is connected with flue gas recirculation burner by the expansion joint on flue, described flue gas recirculation burner is connected with Π type boiler furnace, described flue gas recirculation flue has gas recirculating fan.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520568446.4U CN204986979U (en) | 2015-07-31 | 2015-07-31 | High temperature gas recirculation device of high sodium metal coal pi type boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520568446.4U CN204986979U (en) | 2015-07-31 | 2015-07-31 | High temperature gas recirculation device of high sodium metal coal pi type boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204986979U true CN204986979U (en) | 2016-01-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520568446.4U Active CN204986979U (en) | 2015-07-31 | 2015-07-31 | High temperature gas recirculation device of high sodium metal coal pi type boiler |
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| CN (1) | CN204986979U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106500110A (en) * | 2016-12-30 | 2017-03-15 | 安徽海螺川崎工程有限公司 | Middle flow pattern chamber structure and secondary combustion system |
| CN106524179A (en) * | 2016-12-30 | 2017-03-22 | 安徽海螺川崎工程有限公司 | Waste incineration secondary air duct system |
-
2015
- 2015-07-31 CN CN201520568446.4U patent/CN204986979U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106500110A (en) * | 2016-12-30 | 2017-03-15 | 安徽海螺川崎工程有限公司 | Middle flow pattern chamber structure and secondary combustion system |
| CN106524179A (en) * | 2016-12-30 | 2017-03-22 | 安徽海螺川崎工程有限公司 | Waste incineration secondary air duct system |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |