CN204756900U - Medium temperature gas recirculation device of high sodium metal coal pi type boiler - Google Patents
Medium temperature gas recirculation device of high sodium metal coal pi type boiler Download PDFInfo
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- CN204756900U CN204756900U CN201520568572.XU CN201520568572U CN204756900U CN 204756900 U CN204756900 U CN 204756900U CN 201520568572 U CN201520568572 U CN 201520568572U CN 204756900 U CN204756900 U CN 204756900U
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- gas recirculation
- type boiler
- sodium metal
- high sodium
- flue
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Abstract
Provided is a medium 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 medium temperature gas recirculation device of high sodium metal coal pi type boiler which constitutes and includes: pi type boiler furnace (b) (b) 7 (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), has arranged temperature heating surface in pi type boiler furnace export and the horizontal gas pass, has arranged in the afterbody flue that low temperature receives the hot side, afterbody flue department dust remover (b) (b) 10 (b) (b) has, the medium temperature flue gas of economizer district exit has smoke mouthful (b) (b) 1 (b) (a b), the mouth of smoking is connected with recycling wind channel (b) (b) 2 (b) (b) one side, the expansion joint (b) (b) 3 (b) (b) that recycling wind channel opposite side passes through on the wind channel is connected with gas recirculation combustor (b) (b) 4 (b) (b), gas recirculation fan (b) (b) 5 (b) (b) has on the gas recirculation flue. The utility model discloses be applied to the medium temperature gas recirculation of high sodium metal coal pi type boiler. (B, )
Description
technical field:
the utility model relates to a kind of middle temperature flue gas recirculation device 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 middle temperature flue gas recirculation device of high sodium metal coal Π type boiler.
above-mentioned object is realized by following technical scheme:
a kind of middle temperature flue gas recirculation device 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, in described back-end ductwork, there is economizer, described exit, economizer Zhong Wen flue gas district has smoking mouth, described smoking mouth is connected with recirculating air duct side, described recirculating air duct opposite side is connected with flue gas recirculation burner by the expansion joint on air channel, 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 middle temperature flue gas recirculating technique of high sodium metal coal burning boiler of the utility model according to the needs of actual conditions, can be arranged in the middle temperature smoke-gas area at boiler tail economizer exit place, extracts flue gas.Be applied to and use on high sodium metal coal Π type boiler, a certain amount of middle temperature flue gas is injected in burner hearth by flue gas recycled burner, stove combustion temperature can be adjusted within the specific limits, the alkali metal concn in burner hearth flue gas can also be reduced simultaneously, while reducing the growing amount of boiler nitrogen oxide so to a certain extent, 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 600 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 middle temperature flue gas recirculation device of high sodium metal coal Π type boiler, its composition comprises: Π type boiler furnace 7, 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 10, there is in described back-end ductwork economizer 6, described exit, economizer Zhong Wen flue gas district has smoking mouth 1, described smoking mouth is connected with recirculating air duct 2 side, described recirculating air duct opposite side is connected with flue gas recirculation burner 4 by the expansion joint 3 on air channel, described flue gas recirculation burner is connected with Π type boiler furnace, described flue gas recirculation flue has gas recirculating fan 5.
Claims (1)
1. the middle temperature flue gas recirculation device 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, in described back-end ductwork, there is economizer, described exit, economizer Zhong Wen flue gas district has smoking mouth, described smoking mouth is connected with recirculating air duct side, described recirculating air duct opposite side is connected with flue gas recirculation burner by the expansion joint on air channel, 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 |
|---|---|---|---|
| CN201520568572.XU CN204756900U (en) | 2015-07-31 | 2015-07-31 | Medium temperature gas recirculation device of high sodium metal coal pi type boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520568572.XU CN204756900U (en) | 2015-07-31 | 2015-07-31 | Medium temperature gas recirculation device of high sodium metal coal pi type boiler |
Publications (1)
| Publication Number | Publication Date |
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| CN204756900U true CN204756900U (en) | 2015-11-11 |
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| CN201520568572.XU Active CN204756900U (en) | 2015-07-31 | 2015-07-31 | Medium temperature gas recirculation device of high sodium metal coal pi type boiler |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107906511A (en) * | 2017-12-07 | 2018-04-13 | 浙江大学 | A kind of middle low-temperature flue gas dual-cycle plant and its method for preventing high-alkali coal slagging |
| CN108413605A (en) * | 2018-03-28 | 2018-08-17 | 宁夏宝利达化工有限公司 | A kind of tubular heater |
| CN108488782A (en) * | 2018-03-14 | 2018-09-04 | 西安交通大学 | A kind of flue gas temperature adjustment coal-fired electric generation furnace and operation method |
| CN108613170A (en) * | 2018-03-14 | 2018-10-02 | 西安交通大学 | A kind of supercritical carbon dioxide coal generating system and operation method |
-
2015
- 2015-07-31 CN CN201520568572.XU patent/CN204756900U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107906511A (en) * | 2017-12-07 | 2018-04-13 | 浙江大学 | A kind of middle low-temperature flue gas dual-cycle plant and its method for preventing high-alkali coal slagging |
| CN108488782A (en) * | 2018-03-14 | 2018-09-04 | 西安交通大学 | A kind of flue gas temperature adjustment coal-fired electric generation furnace and operation method |
| CN108613170A (en) * | 2018-03-14 | 2018-10-02 | 西安交通大学 | A kind of supercritical carbon dioxide coal generating system and operation method |
| CN108413605A (en) * | 2018-03-28 | 2018-08-17 | 宁夏宝利达化工有限公司 | A kind of tubular heater |
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