CN204756899U - Low temperature gas recirculation device of high sodium metal coal pi type boiler - Google Patents
Low temperature gas recirculation device of high sodium metal coal pi type boiler Download PDFInfo
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- CN204756899U CN204756899U CN201520568570.0U CN201520568570U CN204756899U CN 204756899 U CN204756899 U CN 204756899U CN 201520568570 U CN201520568570 U CN 201520568570U CN 204756899 U CN204756899 U CN 204756899U
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Abstract
(B, ) the utility model relates to a low temperature gas recirculation device of high sodium metal coal pi type boiler. Internal power plant boiler serious slagging scorification appears, stains and the deposition condition under the condition that uses high sodium metal coal. A low 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), low temperature flue gas district behind the dust -exhaust has smoke mouthful (b) (b) 1 (b) (a b), the mouth of smoking is connected with gas recirculation flue (b) (b) 2 (b) (b), the expansion joint (b) (b) 3 (b) (b) that the gas recirculation flue 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 low temperature gas recirculation of high sodium metal coal pi type boiler. (B, )
Description
technical field:
the utility model relates to a kind of low-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 low-temperature flue gas EGR of high sodium metal coal Π type boiler.
above-mentioned object is realized by following technical scheme:
a kind of low-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, low-temperature flue gas district after described house outlet has smoking mouth, described smoking mouth is connected with flue gas recirculation flue, described flue gas recirculation flue 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. the smoking mouth of low-temperature flue gas recirculating technique that the utility model is used for high sodium metal coal Π type boiler be arranged in boiler dust remover according to actual conditions after low-temperature flue gas region, to extract flue gas, this flue-gas temperature is greatly between 100 ~ 150 DEG C, and dust content is few, flue gas to recirculating gas duct wearing and tearing and corrosivity weak, recirculating gas duct design material require low.For using the Π type boiler of high sodium metal coal, extract a small amount of low-temperature flue gas, the high-temperature region of burner region is injected into by burner, significantly effectively can reduce alkali metal concn in the temperature of stove combustion high-temperature region and burner hearth flue gas, such one side significantly can not only reduce the growing amount of boiler nitrogen oxide, significantly can also alleviate on the one hand the slagging scorification of boiler, contamination and dust stratification situation in addition, ensure that boiler is while using high sodium metal coal, can at full capacity, safety, stable operation.Be 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 low-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, low-temperature flue gas district after described house outlet has smoking mouth 1, described smoking mouth is connected with flue gas recirculation flue 2, described flue gas recirculation flue 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 low-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, low-temperature flue gas district after described house outlet has smoking mouth, described smoking mouth is connected with flue gas recirculation flue, described flue gas recirculation flue 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 |
|---|---|---|---|
| CN201520568570.0U CN204756899U (en) | 2015-07-31 | 2015-07-31 | Low temperature gas recirculation device of high sodium metal coal pi type boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201520568570.0U CN204756899U (en) | 2015-07-31 | 2015-07-31 | Low temperature gas recirculation device of high sodium metal coal pi type boiler |
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| Publication Number | Publication Date |
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| CN204756899U true CN204756899U (en) | 2015-11-11 |
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| CN201520568570.0U Active CN204756899U (en) | 2015-07-31 | 2015-07-31 | Low temperature gas recirculation device of high sodium metal coal pi type boiler |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN109737389A (en) * | 2019-02-27 | 2019-05-10 | 哈尔滨锅炉厂有限责任公司 | A kind of quasi- eastern coal low-temperature burning control system |
-
2015
- 2015-07-31 CN CN201520568570.0U patent/CN204756899U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN109737389A (en) * | 2019-02-27 | 2019-05-10 | 哈尔滨锅炉厂有限责任公司 | A kind of quasi- eastern coal low-temperature burning control system |
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