CN209445339U - A kind of energy-saving and environment-friendly exhaust gas electricity generation boiler - Google Patents

A kind of energy-saving and environment-friendly exhaust gas electricity generation boiler Download PDF

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Publication number
CN209445339U
CN209445339U CN201821912123.2U CN201821912123U CN209445339U CN 209445339 U CN209445339 U CN 209445339U CN 201821912123 U CN201821912123 U CN 201821912123U CN 209445339 U CN209445339 U CN 209445339U
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gas
boiler
air preheater
flue gas
temperature
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汤海军
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汤海军
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00Combustion technologies with mitigation potential
    • Y02E20/34Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery

Abstract

The utility model discloses a kind of energy-saving and environment-friendly exhaust gas electricity generation boilers, including boiler, superheater, bypass economizer, main economizer, the gas heater that boiler outer flow of flue gas direction is sequentially connected in series is set, air preheater, gas inlet end of the flue gas through flue gas pipeline connection gas heater after main economizer cooling, gas inlet end of the smoke outlet of gas heater through flue gas pipeline connection air preheater, the flue gas of air preheater discharge is discharged into atmosphere through pipeline, coal gas enters in burner hearth after gas piping enters gas heater heating, air enters in boiler furnace after pipeline enters air preheater heating, the air preheater uses phase-change heat-exchange structure, use the bootable heat pipe of 70 DEG C of temperature or less as heat exchange element.The utility model can further decrease gas boiler exhaust gas temperature, more recycle low temperature exhaust heat, promote boiler efficiency, and optimized medium heat transfer temperature difference, reduce the manufacturing cost under same exhaust gas temperature.

Description

A kind of energy-saving and environment-friendly exhaust gas electricity generation boiler
Technical field
The utility model relates to a kind of combustible exhaust gas generated using steel-making, iron-making production as the exhaust gas of fuel hair Electric boiler.
Background technique
It is super-pressure and subcritical boiler that steel industry combustible exhaust gas fuel, which is used for steam parameter, at present generally by including Coke-stove gas, blast furnace gas, coal gas of converter fuel characteristic be designed, all coal gas Boiler Furnace chamber inner combustion formed high temperature Flue gas after heat release is to boiler water wall, flows through superheaters at different levels, the bypass economizer, main economizer, air preheater of boiler, Gas heater, successively furnace water, steam, water supply, the air inside heating boiler, after the coal gas of boiler exterior, flue gas is discharged into Atmosphere, 130 DEG C of temperature or so.
As shown in Figure 1, the flue gas come out from 1 burner hearth of boiler sequentially enters main province's coal through superheater 2 and bypass economizer 3 Device 4, air preheater 5, through flue 6 to gas heater 7, flue gas is constantly cooled to 130 DEG C or so, through flue 6 Discharge.Coal gas passes through gas piping 8 and is sent into 1 burner hearth of boiler after gas piping 8 enters the heating of gas heater 7.Air is through sky Feed channel 9 enters after air preheater 5 heats to 1 burner hearth of boiler.Coal gas of high temperature enters burner hearth mixing after-combustion with hot wind, generates High-temperature flue gas.
The boiler coal gas heater of the prior art is with the flue gas coal gas compared with low temperature, with the flue gas of higher temperature The rising space of air, gas temperature is restricted, and cannot absorb more waste heats, is limited by heat absorption with exothermic equilibrium, no Exhaust gas temperature can be reduced too many.130 DEG C of exhaust gas temperature or so, heat loss due to exhaust gas still has 8% or so, not energy-efficient enough;Together When, be dry method dust gas temperature generally at 60 DEG C or more, higher than natural air temperature (about 30 DEG C), coal gas in the prior art The temperature difference of temperature and flue gas initial temperature after heating is smaller, and the heat exchange area needed is very big, and investment cost is high.Boiler coke oven Sulfur-bearing is higher in coal gas, and the moisture generated after burning is more, is easy moisture condensation, and in topical hypothermia's moisture condensation, sour corrosion occurs.This For the past only requires boiler clean emission in power industry, so that existing boiler design does not account for denitration function.
Summary of the invention
For above-mentioned problems of the prior art, the utility model provides a kind of overall good effect of heat exchange, smoke evacuation temperature Degree is lower, heat loss is smaller, the significantly energy-saving and environment-friendly exhaust gas electricity generation boiler of energy-saving effect.
The technical solution adopted in the utility model is as follows: a kind of energy-saving and environment-friendly exhaust gas electricity generation boiler, including boiler, setting Superheater, bypass economizer, main economizer in the boiler back end ductwork, further include being arranged in boiler outer flow of flue gas Gas heater that direction is sequentially connected in series, air preheater, the flue gas after main economizer cooling add through flue gas pipeline connection coal gas The gas inlet end of hot device, the smoke outlet of gas heater connect the gas inlet end of air preheater through flue gas pipeline, Air preheater discharge flue gas be discharged into atmosphere through flue, coal gas through gas piping enter gas heater heating after, Enter in burner hearth through coal gas of high temperature pipeline, air enters boiler through air pipeline after air pipeline enters air preheater heating In burner hearth, the air preheater uses phase-change heat-exchange structure, uses the bootable heat pipe of 70 DEG C of temperature or less as heat exchange element.
Further, SCR denitration device is additionally provided between bypass economizer, main economizer.
Further, the gas heater uses phase-change heat-exchange structure.
Compared with prior art, the beneficial effects of the utility model are as follows:
(1) the utility model uses countercurrent heat exchange method, utilizes the higher higher coal of flue gas initial temperature of temperature Gas (about 60 DEG C), is heated to higher temperature for gas temperature, utilizes the lower lower air of flue gas initial temperature of temperature (about 30 DEG C) keep two-part heat transfer temperature difference more reasonable to realize heat absorption and exothermic balance, overall good effect of heat exchange, can incite somebody to action Exhaust gas temperature is reduced to 80 DEG C, and every 13 DEG C of reduction exhaust gas temperature or so, boiler efficiency 1% can be improved, after the technical application, from 130 DEG C reduce by 80 DEG C, can 3% or more raising efficiency, energy-saving effect is obvious;
(2) air preheater can avoid topical hypothermia using phase-change heat-exchange structure and cause local sour corrosion;
(3) under same exhaust gas temperature, heat-transfer surface can be reduced, reduces equipment manufacturing costs, meanwhile, ventilation resistance becomes smaller, Run power consumption decline;
(4) increase SCR denitration device, be able to satisfy nitrogen oxygen thing content clean emission standard requirements.
Detailed description of the invention
Fig. 1 is the process frame chart of the prior art.
Fig. 2 is the process frame chart of the utility model.
Specific embodiment
For the ease of understanding the utility model, below in conjunction with Figure of description and preferred embodiment to the utility model Work more comprehensively, meticulously describes, but the protection scope of the utility model is not limited to embodiment in detail below.
As shown in Fig. 2, a kind of energy-saving and environment-friendly exhaust gas electricity generation boiler of the present embodiment, including boiler 1, setting are in the pot Superheater 2, bypass economizer 3, SCR denitration device 10, main economizer 4 in furnace back-end ductwork, further include being arranged outside boiler Gas heater 7, the air preheater 5 being sequentially connected in series along flow of flue gas direction, the flue gas after the main cooling of economizer 4 is through fume pipe Road 6 connects the gas inlet end of gas heater 7, and the smoke outlet of gas heater 7 connects air preheat through flue gas pipeline 6 The gas inlet end of device 5 enters air preheater 5, and flue-gas temperature is discharged into atmosphere after being reduced to 80 DEG C through flue 6.Coal gas Through gas piping 8 enter gas heater 7 heat after, through coal gas of high temperature pipeline 8 enter burner hearth in, air through air pipeline 9 into Enter after air preheater 5 heats and enter in boiler furnace through air pipeline 9, by the way that air preheater 5 is removed layout of boiler, allows The higher higher coal gas of flue gas initial temperature of temperature (about 60 DEG C), the lower lower air of flue gas temperature of temperature (about 30 DEG C) realize heat absorption and exothermic balance.The air preheater 5 of low-temperature end uses phase-change heat-exchange structure, with 70 DEG C of temperature Bootable heat pipe can avoid topical hypothermia and cause local sour corrosion as heat exchange element below.Gas heater 7 uses Phase-change heat-exchange structure does not have coal gas when there is leakage and enters in flue gas medium and safety problem occur.
With the help of the introduction present in aforementioned specification and relevant drawings, the technology people of the utility model fields Member will be appreciated that many modifications and other embodiments of the utility model.It will consequently be understood that the utility model is not limited to Disclosed specific embodiment, modification and other embodiments are to be considered as included in scope of the appended claims.Although this Specific term is used in text, they are only used with generic and descriptive sense, rather than limitation.

Claims (2)

1. a kind of energy-saving and environment-friendly exhaust gas electricity generation boiler, including boiler, the superheater being arranged in the boiler back end ductwork, side Road economizer, main economizer, it is characterised in that: further include that the coal gas that boiler outer flow of flue gas direction is sequentially connected in series is arranged in add Hot device, air preheater, gas inlet end of the flue gas through flue gas pipeline connection gas heater after main economizer cooling, coal gas Gas inlet end of the smoke outlet of heater through flue gas pipeline connection air preheater, the flue gas warp of air preheater discharge Flue is discharged into atmosphere, and coal gas enters burner hearth through coal gas of high temperature pipeline after gas piping enters gas heater heating In, air enters in boiler furnace after air pipeline enters air preheater heating through air pipeline, the air preheater Using phase-change heat-exchange structure, use the bootable heat pipe of 70 DEG C of temperature or less as heat exchange element, in bypass economizer, main economizer Between be additionally provided with SCR denitration device.
2. a kind of energy-saving and environment-friendly exhaust gas electricity generation boiler as described in claim 1, it is characterised in that: the gas heater is adopted With phase-change heat-exchange structure.
CN201821912123.2U 2018-11-20 2018-11-20 A kind of energy-saving and environment-friendly exhaust gas electricity generation boiler Active CN209445339U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201821912123.2U CN209445339U (en) 2018-11-20 2018-11-20 A kind of energy-saving and environment-friendly exhaust gas electricity generation boiler

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201821912123.2U CN209445339U (en) 2018-11-20 2018-11-20 A kind of energy-saving and environment-friendly exhaust gas electricity generation boiler

Publications (1)

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CN209445339U true CN209445339U (en) 2019-09-27

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112325270A (en) * 2020-12-16 2021-02-05 无锡华光环保能源集团股份有限公司 Gas boiler with low emission of semi-coke tail gas for combustion
CN113432109A (en) * 2021-06-28 2021-09-24 东方电气集团东方锅炉股份有限公司 Double reheating gas boiler

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112325270A (en) * 2020-12-16 2021-02-05 无锡华光环保能源集团股份有限公司 Gas boiler with low emission of semi-coke tail gas for combustion
CN113432109A (en) * 2021-06-28 2021-09-24 东方电气集团东方锅炉股份有限公司 Double reheating gas boiler

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