CN204438718U - Residual heat from boiler fume drying brown coal system and boiler smoke system - Google Patents

Residual heat from boiler fume drying brown coal system and boiler smoke system Download PDF

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Publication number
CN204438718U
CN204438718U CN201420781818.7U CN201420781818U CN204438718U CN 204438718 U CN204438718 U CN 204438718U CN 201420781818 U CN201420781818 U CN 201420781818U CN 204438718 U CN204438718 U CN 204438718U
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China
Prior art keywords
circulating water
boiler
heat exchanger
brown coal
air
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CN201420781818.7U
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Chinese (zh)
Inventor
张润盘
董丽娟
贾绍广
李智
杨立辉
阎占良
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河北省电力勘测设计研究院
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Priority to CN201420781818.7U priority Critical patent/CN204438718U/en
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Publication of CN204438718U publication Critical patent/CN204438718U/en

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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 residual heat from boiler fume drying brown coal system and boiler smoke system; Described residual heat from boiler fume drying brown coal system comprises flue gas-Heat Exchanger in Circulating Water System, air-Heat Exchanger in Circulating Water System, dry gas air-introduced machine, brown coal drying tower, feeder and discharging machine; Described boiler smoke system comprises economizer, air preheater, dry electrostatic cleaner, smoke induced draught fan, desulfuration absorbing tower, wet cottrell and described residual heat from boiler fume drying brown coal system.The utility model farthest make use of the heat in boiler smoke, improves the coal-fired quality of the unit using brown coal, improves boiler efficiency, and makes fume emission reach ultra-clean level.

Description

Residual heat from boiler fume drying brown coal system and boiler smoke system
Technical field
The utility model relates to the smoke processing system of coal-burning power plant, is specifically related to a kind of residual heat from boiler fume drying brown coal system and boiler smoke system.
Background technology
Say thermal power plant, maximum in boiler heat loss is heat loss due to exhaust gas.In general, exhaust gas temperature often reduces l0 DEG C, and boiler thermal output improves about 0.5% to 0.6%.Therefore, boiler exhaust gas is the residual heat resources that potentiality are very large.At present, mostly eliminate GGH system in the flue gas system of new upper large-scale thermal power machine group, this just makes the flue-gas temperature entering desulphurization system higher, and be generally about 130 DEG C, lignite-fired unit may reach 145 DEG C.In order to sulfur removal technology reaches best operating temperature, i.e. flue-gas temperature 80 DEG C ~ 90 DEG C, at present, many newly-built desulphurization systems are provided with spraying cooling system.As can be seen here, enter the temperature difference of between the flue-gas temperature of desulphurization system and best desulfurization operating temperature tens degree, contain huge heat, slatterned like this.Therefore, the recycling of this partial fume waste heat is very important.
Utility model content
In view of this, the purpose of this utility model is to provide a kind of residual heat from boiler fume drying brown coal system and boiler smoke system, the high water content brown coal utilizing the dry power plant of residual heat from boiler fume to use, improves the low heat valve (improving coal-fired quality) of as-fired coal, improves boiler efficiency.
For achieving the above object, the utility model provides following technical scheme:
The utility model discloses a kind of residual heat from boiler fume drying brown coal system, comprise flue gas-Heat Exchanger in Circulating Water System, air-Heat Exchanger in Circulating Water System, dry gas air-introduced machine, brown coal drying tower, feeder and discharging machine, described flue gas-Heat Exchanger in Circulating Water System is arranged in boiler back end ductwork, the circulating water pipeline of described air-Heat Exchanger in Circulating Water System is communicated with the circulating water pipeline of flue gas-Heat Exchanger in Circulating Water System, the inlet air pipeline of described brown coal drying tower bottom is communicated with air-Heat Exchanger in Circulating Water System, the wind pipe on described brown coal drying tower top is communicated with boiler furnace by dry gas air-introduced machine, described feeder is communicated with the coal-in port of brown coal drying top of tower, described discharging machine is communicated with the coal outlet of brown coal drying tower bottom.
In technique scheme, described flue gas-Heat Exchanger in Circulating Water System and air-Heat Exchanger in Circulating Water System are pipe heat exchanger, and the circulating water pipeline of described flue gas-Heat Exchanger in Circulating Water System and the circulating water pipeline of air-Heat Exchanger in Circulating Water System are the tube side passage of pipe heat exchanger.
In technique scheme, described feeder and discharging machine are belt conveyor.
The invention also discloses a kind of boiler smoke system comprising described residual heat from boiler fume drying brown coal system, comprise economizer, air preheater, dry electrostatic cleaner, smoke induced draught fan, desulfuration absorbing tower, wet cottrell and described residual heat from boiler fume drying brown coal system, described economizer, air preheater and dry electrostatic cleaner are arranged in boiler back end ductwork successively from upstream to downstream, the outlet of described dry electrostatic cleaner is communicated with desulfuration absorbing tower bottom by smoke induced draught fan, described desulfuration absorbing tower top is communicated with the entrance of wet cottrell, the outlet of described wet cottrell is communicated with chimney.
As further improvement of the utility model, the flue gas-Heat Exchanger in Circulating Water System quantity of described residual heat from boiler fume drying brown coal system is two, and two flue gas-Heat Exchanger in Circulating Water Systems are mutually connected and lay respectively at the upstream and downstream of dry electrostatic cleaner.
The beneficial effects of the utility model are:
The high water content brown coal that the utility model utilizes the dry power plant of residual heat from boiler fume to use, farthest make use of the heat in boiler smoke, improves the coal-fired quality of the unit using brown coal, improve boiler efficiency; The theory that the utility model fully combines " energy classified utilization ", utilizes low grade heat energy to improve the quality of high-grade energy, has enriched the approach that fume afterheat utilizes simultaneously.Meanwhile, the utility model is provided with efficient fume treatment auxiliary in flue gas system, makes main system fume emission reach ultra-clean level.The utility model can be applicable to newly-built or transforms big-and-middle-sized coal heating power-plant flue gas system, can reach higher safety, economy and environment benefit.
Accompanying drawing explanation
In order to make the purpose of this utility model, technical scheme and beneficial effect clearly, the utility model provides following accompanying drawing to be described:
Fig. 1 is structural representation of the present utility model.
In figure: 1, flue gas-Heat Exchanger in Circulating Water System, 2, air-Heat Exchanger in Circulating Water System, 3, dry gas air-introduced machine, 4, brown coal drying tower, 5, feeder, 6, discharging machine, 7, boiler furnace, 8, economizer, 9, air preheater, 10, dry electrostatic cleaner, 11, smoke induced draught fan, 12, desulfuration absorbing tower, 13, wet cottrell.
Detailed description of the invention
Below in conjunction with accompanying drawing, preferred embodiment of the present utility model is described in detail.
Fig. 1 is structural representation of the present utility model, as shown in the figure, residual heat from boiler fume drying brown coal system comprises flue gas-Heat Exchanger in Circulating Water System 1, air-Heat Exchanger in Circulating Water System 2, dry gas air-introduced machine 3, brown coal drying tower 4, feeder 5 and discharging machine 6, described flue gas-Heat Exchanger in Circulating Water System 1 is arranged in boiler back end ductwork, the circulating water pipeline of described air-Heat Exchanger in Circulating Water System 2 is communicated with the circulating water pipeline of flue gas-Heat Exchanger in Circulating Water System 1, the inlet air pipeline of described brown coal drying tower 4 bottom is communicated with air-Heat Exchanger in Circulating Water System 2, the wind pipe on described brown coal drying tower 4 top is communicated with boiler furnace 7 by dry gas air-introduced machine 3, described feeder 5 is communicated with the coal-in port at brown coal drying tower 4 top, described discharging machine 6 is communicated with the coal outlet bottom brown coal drying tower 4.
Boiler smoke system, comprise economizer 8, air preheater 9, dry electrostatic cleaner 10, smoke induced draught fan 11, desulfuration absorbing tower 12, wet cottrell 13 and described residual heat from boiler fume drying brown coal system, described economizer 8, air preheater 9 and dry electrostatic cleaner 10 are arranged in boiler back end ductwork successively from upstream to downstream, the outlet of described dry electrostatic cleaner 10 is communicated with desulfuration absorbing tower 12 bottom by smoke induced draught fan 11, described desulfuration absorbing tower 12 top is communicated with the entrance of wet cottrell 13, the outlet of described wet cottrell 13 is communicated with chimney, flue gas-Heat Exchanger in Circulating Water System 1 quantity of described residual heat from boiler fume drying brown coal system is two, two flue gas-Heat Exchanger in Circulating Water Systems 1 are mutually connected and lay respectively at the upstream and downstream of dry electrostatic cleaner 10.
Described flue gas-Heat Exchanger in Circulating Water System 1 and air-Heat Exchanger in Circulating Water System 2 are pipe heat exchanger, and the circulating water pipeline of described flue gas-Heat Exchanger in Circulating Water System 1 and the circulating water pipeline of air-Heat Exchanger in Circulating Water System 2 are the tube side passage of pipe heat exchanger.
Described feeder 5 and discharging machine 6 are belt conveyor.
When flue gas system runs, make boiler smoke and recirculated water heat exchange, boiler smoke is reduced to about 80 DEG C of desulfurization entrance requirement from 140 DEG C by flue gas-Heat Exchanger in Circulating Water System 1, boiler heat loss minimizing 60 DEG C, boiler conversion efficiency can improve about about 5%; The circulating water pipeline of flue gas-Heat Exchanger in Circulating Water System 1 and the circulating water pipeline of air-Heat Exchanger in Circulating Water System 2 form a closed circuit, utilize closed cycle water, the heat reclaimed are used for the hot blast of heat drying high water content brown coal in boiler smoke; Hot blast is introduced airtight brown coal drying tower 4 bottom, then hot blast is from the bottom to top by brown coal drying tower 4 drying brown coal, by dry gas air-introduced machine 3, the air containing part coal dust and coal volatilization powder is drawn again, finally deliver in boiler hot Secondary Air pipeline, enter boiler furnace 7, participate in boiler combustion; Raw coal feeds brown coal drying tower 4 by top feeder 5, after heated-air drying, falls into the discharging machine 6 of bottom, sends into boiler original coal bunker.Meanwhile, namely boiler smoke reduces the ratio resistance of dust after reducing flue-gas temperature by economizer 8 and air preheater 9, turn reduce the volume of flue gas, in a disguised form add the specific dust collection area of dry electrostatic cleaner 10, then by the desulfurization of desulfuration absorbing tower 12 high efficiency, make SO 2reach 10mg/Nm 3below, eventually pass wet cottrell 13 dust emission concentration is controlled at 5mg/Nm 3below, smoke stack emission is passed through.
What finally illustrate is, above preferred embodiment is only in order to illustrate the technical solution of the utility model and unrestricted, although be described in detail the utility model by above preferred embodiment, but those skilled in the art are to be understood that, various change can be made to it in the form and details, and not depart from the utility model claims limited range.

Claims (5)

1. a residual heat from boiler fume drying brown coal system, it is characterized in that: comprise flue gas-Heat Exchanger in Circulating Water System (1), air-Heat Exchanger in Circulating Water System (2), dry gas air-introduced machine (3), brown coal drying tower (4), feeder (5) and discharging machine (6), described flue gas-Heat Exchanger in Circulating Water System (1) is arranged in boiler back end ductwork, the circulating water pipeline of described air-Heat Exchanger in Circulating Water System (2) is communicated with the circulating water pipeline of flue gas-Heat Exchanger in Circulating Water System (1), the inlet air pipeline of described brown coal drying tower (4) bottom is communicated with air-Heat Exchanger in Circulating Water System (2), the wind pipe on described brown coal drying tower (4) top is communicated with boiler furnace (7) by dry gas air-introduced machine (3), described feeder (5) is communicated with the coal-in port at brown coal drying tower (4) top, described discharging machine (6) is communicated with the coal outlet of brown coal drying tower (4) bottom.
2. residual heat from boiler fume drying brown coal system according to claim 1, it is characterized in that: described flue gas-Heat Exchanger in Circulating Water System (1) and air-Heat Exchanger in Circulating Water System (2) are pipe heat exchanger, the circulating water pipeline of described flue gas-Heat Exchanger in Circulating Water System (1) and the circulating water pipeline of air-Heat Exchanger in Circulating Water System (2) are the tube side passage of pipe heat exchanger.
3. residual heat from boiler fume drying brown coal system according to claim 1, is characterized in that: described feeder (5) and discharging machine (6) are belt conveyor.
4. comprise the boiler smoke system of the residual heat from boiler fume drying brown coal system described in claims 1 to 3 any one, it is characterized in that: comprise economizer (8), air preheater (9), dry electrostatic cleaner (10), smoke induced draught fan (11), desulfuration absorbing tower (12), wet cottrell (13) and described residual heat from boiler fume drying brown coal system, described economizer (8), air preheater (9) and dry electrostatic cleaner (10) are arranged in boiler back end ductwork successively from upstream to downstream, the outlet of described dry electrostatic cleaner (10) is communicated with desulfuration absorbing tower (12) bottom by smoke induced draught fan (11), described desulfuration absorbing tower (12) top is communicated with the entrance of wet cottrell (13), the outlet of described wet cottrell (13) is communicated with chimney.
5. boiler smoke system according to claim 4, it is characterized in that: flue gas-Heat Exchanger in Circulating Water System (1) quantity of described residual heat from boiler fume drying brown coal system is two, two flue gas-Heat Exchanger in Circulating Water Systems (1) are mutually connected and lay respectively at the upstream and downstream of dry electrostatic cleaner (10).
CN201420781818.7U 2014-12-12 2014-12-12 Residual heat from boiler fume drying brown coal system and boiler smoke system CN204438718U (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105042575A (en) * 2015-07-27 2015-11-11 四川川锅锅炉有限责任公司 Fuel and gas-fired boiler oxygen-enriched combustion smoke nearly-zero-emission power generation system
CN105066113A (en) * 2015-07-27 2015-11-18 四川川锅锅炉有限责任公司 Coal-powder boiler oxygen-enriched combustion smoke near-zero emission and power generation system
CN105115286A (en) * 2015-08-21 2015-12-02 广西立盛茧丝绸有限公司 Drying device utilizing waste heat of boiler flue gas
CN109929574A (en) * 2017-12-15 2019-06-25 神华集团有限责任公司 The system and method for power plant's coupling production clean coal
CN109929573A (en) * 2017-12-15 2019-06-25 神华集团有限责任公司 The method and system of power plants generating electricity coupling production clean coal
CN109929575A (en) * 2017-12-15 2019-06-25 神华集团有限责任公司 The method and system of power plants generating electricity coupling production clean coal

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105042575A (en) * 2015-07-27 2015-11-11 四川川锅锅炉有限责任公司 Fuel and gas-fired boiler oxygen-enriched combustion smoke nearly-zero-emission power generation system
CN105066113A (en) * 2015-07-27 2015-11-18 四川川锅锅炉有限责任公司 Coal-powder boiler oxygen-enriched combustion smoke near-zero emission and power generation system
CN105115286A (en) * 2015-08-21 2015-12-02 广西立盛茧丝绸有限公司 Drying device utilizing waste heat of boiler flue gas
CN109929574A (en) * 2017-12-15 2019-06-25 神华集团有限责任公司 The system and method for power plant's coupling production clean coal
CN109929573A (en) * 2017-12-15 2019-06-25 神华集团有限责任公司 The method and system of power plants generating electricity coupling production clean coal
CN109929575A (en) * 2017-12-15 2019-06-25 神华集团有限责任公司 The method and system of power plants generating electricity coupling production clean coal

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Address after: 050031 No. 6 Jianbei Street, Chang'an District, Shijiazhuang City, Hebei Province

Patentee after: China Electric Power Construction Group Hebei electric survey and Design Research Institute Co., Ltd.

Address before: 050031 No. 6 Jianbei Street, Chang'an District, Shijiazhuang City, Hebei Province

Patentee before: Hebei Province Power Surveying Design & Research Institute

CP01 Change in the name or title of a patent holder