CN106931464A - The supply air system of thermal power plant's Air-Cooling Island cooling wind and boiler air-supply cooperation - Google Patents

The supply air system of thermal power plant's Air-Cooling Island cooling wind and boiler air-supply cooperation Download PDF

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Publication number
CN106931464A
CN106931464A CN201511007064.5A CN201511007064A CN106931464A CN 106931464 A CN106931464 A CN 106931464A CN 201511007064 A CN201511007064 A CN 201511007064A CN 106931464 A CN106931464 A CN 106931464A
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China
Prior art keywords
air
supply
boiler
cooling
thermal power
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CN201511007064.5A
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Chinese (zh)
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韩建平
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Individual
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Individual
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Priority to CN201511007064.5A priority Critical patent/CN106931464A/en
Publication of CN106931464A publication Critical patent/CN106931464A/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
    • F23L15/00—Heating of air supplied for combustion
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K17/00—Using steam or condensate extracted or exhausted from steam engine plant
    • F01K17/02—Using steam or condensate extracted or exhausted from steam engine plant for heating purposes, e.g. industrial, domestic
    • Y—GENERAL 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00—Combustion technologies with mitigation potential
    • Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Air Supply (AREA)

Abstract

The present invention relates to a kind of thermal power plant's Air-Cooling Island cooling wind and the supply air system of boiler air-supply cooperation, including：Air-Cooling Island, sealing kuppe, airduct, valve, boiler fan.It is mainly used in reclaiming the part used heat of steam turbine discharge, improves boiler wind pushing temperature, unit generation coal consumption can be reduced in the case where exhaust gas temperature is constant.

Description

The supply air system of thermal power plant's Air-Cooling Island cooling wind and boiler air-supply cooperation
Technical field
The present invention relates to the application field of Direct Air-Cooled thermal power generation unit energy-conserving and emission-cutting technology, more particularly to a kind of partially recycled technology of Direct Air-Cooled thermal power generation unit used heat.
Background technology
Under pure condensate operating mode, the coal burning caloricity that thermal power plant there are about 55% is drained from turbine condenser, as used heat, up to the present, there is no feasible Waste Heat Recovery means.For Direct Air-cooled Unit, boiler benefit wind is used as by reclaiming Air-Cooling Island cooling air, is capable of achieving the partially recycled of used heat, and reduce unit station service, so as to reduce unit generation coal consumption, reduce CO2Discharge capacity.
The content of the invention
The purpose of the present invention is to realize that steam turbine discharges the partially recycled of used heat, so as to reduce gross coal consumption rate, reduces CO2Discharge capacity.
Thermal power plant's Air-Cooling Island cooling wind of the present invention includes with the supply air system of boiler air-supply cooperation：Air-Cooling Island, sealing kuppe, airduct, valve, standby air inlet and air intake valve, boiler fan.
For the thermal power generation unit of Direct Air-Cooled, by taking 300MW units as an example, the temperature rise of cooling air is by 16 DEG C of cooling turbine exhaust heat required air quantity L of calculating1About 65416242m3/h, boiler combustion institute required airflow L2About 2052121 m3/h, then reclaim air quantity accounting k=L2/ L1=3.137%.Therefore it may only be necessary in Air-Cooling Island heat exchange area accounting for the several columns of 1.2k install sealing kuppe additional and are connected to boiler fan entrance by airduct, the air for needed for boiler combustion is provided.
Brief description of the drawings
Fig. 1 is the supply air system arrangement schematic diagram of thermal power plant's Air-Cooling Island cooling wind and boiler air-supply cooperation.
In Fig. 1,1-gas turbine exhaust gas device, 2-sealing kuppe, 3-Air-Cooling Island cooling tube bundle, 4-pressure fan air inlet pipe, 5-valve, 6-pressure fan, 7-turbine low pressure cylinder, 8-standby air intake valve, 9-standby air inlet, 10-steam-distributing pipe, 11-collector pipe, 12-discharge.
Specific embodiment
In Air-Cooling Island heat exchange area accounting for the several columns of 1.2k install sealing kuppe additional, and boiler fan entrance is connected to by airduct, the air for needed for boiler combustion is provided.Wherein 1.2 is safety coefficient, and main purpose is to prevent Air-Cooling Island heat-transfer surface freezed in winter and reduction air blower inlet resistance.
Normal operation is remained to ensure to access the Air-Cooling Island of the boiler supply air system supply air system in maintenance, standby air inlet and air intake valve should be installed additional before air blower inlet valve.
To ensure that cooling air can all by Air-Cooling Island cooling tube bundle, sealing kuppe should wrap up each face and good seal on the collector pipe of cooling tube bundle bottom, only retain plane opening where the collector pipe of bottom as cooling air intake.Discharge is provided with the top of sealing kuppe, Wedge fillet or perforate are opened as air inlet in sealing kuppe inside gas collection pipeline section bottom, and to ensure air inlet uniformity, bar seam width or aperture should be tapered since air inlet end.
Because air blower inlet pipeline and Air-Cooling Island heat-transfer surface increased fans entrance resistance, can directly according to calculating parameter type selecting for new-built unit, for retrofitted unit, then should determine whether former blower fan meets requirement by calculating, blade transformation or more ventilating fan are carried out if being unsatisfactory for.
With the economy that 300MW units are calculated：If environment dry-bulb temperature is 20 DEG C, air is 80.73% with respect to moisture, and cooling air temperature rise is 16 DEG C, then surrounding air enthalpy h1=59.62kJ/kg, goes out island air enthalpy h2=76.16kJ/kg, then in the case where exhaust gas temperature is constant, the heat of recovery is:Q=L2×(h2- h1)=40730457 KJ/h, converts into mark coal 1391.495kg/h.8348.971 tons of coal of mark can be then saved every year（Unit annual utilization hours take 6000 hours）, reduce CO in year230612.9 tons of discharge capacity.

Claims (3)

1. thermal power plant's Air-Cooling Island cools down the supply air system of wind and boiler air-supply cooperation, it is characterised in that：Thermal power plant's Air-Cooling Island cooling wind of the present invention includes with the supply air system of boiler air-supply cooperation：Air-Cooling Island, sealing kuppe, airduct, valve, standby air inlet and air intake valve, boiler fan；In Air-Cooling Island heat exchange area accounting for the several columns of 1.2k install sealing kuppe additional, and boiler fan entrance is connected to by discharge and airduct, the air for needed for boiler combustion is provided.
2. thermal power plant's Air-Cooling Island according to claim 1 cools down the supply air system of wind and boiler air-supply cooperation, it is characterised in that：Install standby air inlet and air intake valve additional before air blower inlet valve.
3. thermal power plant's Air-Cooling Island according to claim 1 cools down the supply air system of wind and boiler air-supply cooperation, it is characterised in that：Sealing kuppe should wrap up each face and good seal on the collector pipe of cooling tube bundle bottom, only retain plane opening where the collector pipe of bottom as cooling air intake；Discharge is provided with the top of sealing kuppe, Wedge fillet or perforate are opened as air inlet in sealing kuppe inside gas collection pipeline section bottom, and to ensure air inlet uniformity, bar seam width or aperture should be tapered since air inlet end.
CN201511007064.5A 2015-12-30 2015-12-30 The supply air system of thermal power plant's Air-Cooling Island cooling wind and boiler air-supply cooperation Pending CN106931464A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201511007064.5A CN106931464A (en) 2015-12-30 2015-12-30 The supply air system of thermal power plant's Air-Cooling Island cooling wind and boiler air-supply cooperation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201511007064.5A CN106931464A (en) 2015-12-30 2015-12-30 The supply air system of thermal power plant's Air-Cooling Island cooling wind and boiler air-supply cooperation

Publications (1)

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CN106931464A true CN106931464A (en) 2017-07-07

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CN201511007064.5A Pending CN106931464A (en) 2015-12-30 2015-12-30 The supply air system of thermal power plant's Air-Cooling Island cooling wind and boiler air-supply cooperation

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111043875A (en) * 2019-08-26 2020-04-21 华北电力大学 System for recycling hot air in cooling tower between power station

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101566079A (en) * 2009-05-15 2009-10-28 江苏双良空调设备股份有限公司 Condensing system for heating heat-supply hot water with heat of waste steam from steam turbine
US20100300658A1 (en) * 2009-05-26 2010-12-02 Vladimir Moldovanu Method and system of recovering the heat wasted from the steam boilers continuous blow down to preheat the boiler combustion air
CN203657534U (en) * 2013-10-31 2014-06-18 华北电力大学（保定） Air cooling and radiating unit for air cooling island of direct air cooling machine group
CN103939935A (en) * 2014-04-02 2014-07-23 北京龙源冷却技术有限公司 Boiler blower inlet air heating system
CN203848278U (en) * 2014-05-22 2014-09-24 国家电网公司 Air inlet system for boiler of air cooling unit

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101566079A (en) * 2009-05-15 2009-10-28 江苏双良空调设备股份有限公司 Condensing system for heating heat-supply hot water with heat of waste steam from steam turbine
US20100300658A1 (en) * 2009-05-26 2010-12-02 Vladimir Moldovanu Method and system of recovering the heat wasted from the steam boilers continuous blow down to preheat the boiler combustion air
CN203657534U (en) * 2013-10-31 2014-06-18 华北电力大学（保定） Air cooling and radiating unit for air cooling island of direct air cooling machine group
CN103939935A (en) * 2014-04-02 2014-07-23 北京龙源冷却技术有限公司 Boiler blower inlet air heating system
CN203848278U (en) * 2014-05-22 2014-09-24 国家电网公司 Air inlet system for boiler of air cooling unit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111043875A (en) * 2019-08-26 2020-04-21 华北电力大学 System for recycling hot air in cooling tower between power station

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