CN105840256A - Utilization system of dead steam heat of power plant - Google Patents

Utilization system of dead steam heat of power plant Download PDF

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Publication number
CN105840256A
CN105840256A CN201610330428.1A CN201610330428A CN105840256A CN 105840256 A CN105840256 A CN 105840256A CN 201610330428 A CN201610330428 A CN 201610330428A CN 105840256 A CN105840256 A CN 105840256A
Authority
CN
China
Prior art keywords
heat
condenser
outlet
heat pump
steam
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201610330428.1A
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Chinese (zh)
Inventor
张孝勇
赵文波
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China Datang Corp Science and Technology Research Institute Co Ltd
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China Datang Corp Science and Technology Research Institute Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by China Datang Corp Science and Technology Research Institute Co Ltd filed Critical China Datang Corp Science and Technology Research Institute Co Ltd
Priority to CN201610330428.1A priority Critical patent/CN105840256A/en
Publication of CN105840256A publication Critical patent/CN105840256A/en
Pending legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01KSTEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K17/00Using steam or condensate extracted or exhausted from steam engine plant
    • F01K17/005Using steam or condensate extracted or exhausted from steam engine plant by means of a heat pump
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01KSTEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K17/00Using steam or condensate extracted or exhausted from steam engine plant
    • F01K17/02Using steam or condensate extracted or exhausted from steam engine plant for heating purposes, e.g. industrial, domestic
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24HFLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H4/00Fluid heaters characterised by the use of heat pumps
    • F24H4/02Water heaters

Abstract

The invention relates to a utilization system of dead steam heat of a power plant. The utilization system comprises a boiler, a steam turbine, a condenser, a heat pump, a peak load calorifier and a secondary heat exchange station, wherein the steam turbine is connected with the condenser through an exhaust pipe; a steam extraction pipe is arranged on an air inlet pipe of the steam turbine; a low temperature heat source inlet of the heat pump is connected with a water outlet of the condenser; a lower temperature heat source outlet of the heat pump is connected with a water return port of the condenser; a driving heat source inlet of the heat pump is connected with the steam extraction pipe; a condensate outlet of the heat pump is connected to the boiler; a water supply outlet of the heat pump is connected with a water inlet of the peak load calorifier; a water outlet of the peak load calorifier is connected with a heat source inlet of the secondary heat exchange station through a pipeline; a heat source outlet of the secondary heat exchange station is connected with a water supply inlet of the heat pump; a water inlet of the secondary heat exchange station is connected with a water supply source; and a water outlet of the secondary heat exchange station is connected with a heat utilization device. The utilization system can well adapt to an existing power plant heat supply unit and can utilize dead steam waste heat of the steam turbine, thereby achieving the purposes of energy conservation and consumption reduction.

Description

Exhaust steam of electric power plant heat utilization system
Technical field
The present invention relates to steam power plant's heat recovery technology field, particularly relate to one and exhaust steam in steam turbine is carried out remaining The technology of recuperation of heat.
Background technology
Under energy-saving and emission-reduction main trend, the exhaust steam of steam power plant's thermal power plant unit is carried out waste heat recovery imperative, Exhaust steam of electric power plant waste heat project gets more and more, and this optimization design investment to thermal power plant unit is huge.And it is the biggest Part has been carried out the exhaust steam residual heat recovery project of completion and does not play intended effectiveness in actual motion, many The situation being not suitable with existing thermal power plant unit is all there is in number exhaust steam residual heat project when design and operation.So far, There is no the directive document for exhaust steam of electric power plant waste heat recovery project in industry to put into effect.
Because above-mentioned defect, the design people, the most in addition research and innovation are weary to founding a kind of power plant Vapour heat utilization system, to reach to adapt to power plant's heating system and the purpose of energy-saving consumption-reducing.
Summary of the invention
For solving above-mentioned technical problem, it is an object of the invention to provide a kind of exhaust steam of electric power plant heat utilization system, energy Enough good conformity existing power plant thermal power plant unit also carry out waste heat recovery to exhaust steam in steam turbine, reach energy-saving and cost-reducing Purpose.
A kind of power plant weary gas heat utilization system of the present invention, including boiler, steam turbine, condenser, heat pump, Peak load calorifier and secondary heat exchange station, described boiler is connected with described steam turbine by air inlet pipe, described steamer Machine is connected with described condenser by exhaustor, and the air inlet pipe of described steam turbine connects extraction steam pipe, described Condenser has outlet and water return outlet, and described heat pump has low-temperature heat source import, low-temperature heat source outlet, drives Dynamic thermal source import and condensate outlet, the low-temperature heat source import of described heat pump is by pipeline and described condenser Outlet connects, and the low-temperature heat source outlet of described heat pump is connected by the water return outlet of pipeline with described condenser, The driving heat source import of described heat pump is connected with described extraction steam pipe, and the condensate outlet of described heat pump passes through pipeline Being connected to boiler, the service water outlet of described heat pump is connected with the water inlet of described peak load calorifier by pipeline, The outlet of described peak load calorifier is connected with the thermal source import at described secondary heat exchange station by pipeline, and described two The thermal source outlet of level heat exchange station is connected for water inlet with described heat pump, and the water inlet at described secondary heat exchange station leads to Piping is connected with the resource of water supply of heating equipment, the outlet at described secondary heat exchange station and described heating equipment Connect.
Further, described steam turbine has low pressure (LP) cylinder, and described air inlet pipe is and the low pressure (LP) cylinder of described steam turbine The low pressure (LP) cylinder air induction conduit connected, described extraction steam pipe is connected with described low pressure (LP) cylinder air induction conduit.
Further, the main member at described secondary heat exchange station is heat exchanger, and described heat exchanger is that dividing wall type changes Hot device, heat regenerator, fluidly connect indirect type heat exchanger, direct-contact heat exchanger and compound heat exchange One in device.
Further, described heat pump is lithium bromide absorption type heat pump.
Further, described condenser is water-cooled condenser or air cooling tubes condenser.
Further, described condenser is dividing wall type condenser or contact condenser.
By such scheme, the present invention at least has the advantage that the exhaust steam of electric power plant heat utilization system of the present invention, By condenser, exhaust steam in steam turbine being condensed into low-temperature heat source water, heat pump is by extracting the steam of steam turbine for driving Dynamic thermal source and recycling, from the low-temperature heat source of condenser, produce the hot water of middle megadyne temperature degree, then by point The hot water of middle megadyne temperature degree is further heated up by peak heater, obtains the hot water that temperature is higher, by higher for this temperature Water heat water supply as the thermal source at secondary heat exchange station, thus obtain the water supply that watering equipment is temperature required, Realize the UTILIZATION OF VESIDUAL HEAT IN of steam turbine in thermal power plant exhaust steam.
Described above is only the general introduction of technical solution of the present invention, in order to better understand the technology of the present invention Means, and can being practiced according to the content of description, below with presently preferred embodiments of the present invention and coordinate attached After figure describes in detail such as.
Accompanying drawing explanation
Fig. 1 is the principle schematic of the present invention.
Detailed description of the invention
Below in conjunction with the accompanying drawings and embodiment, the detailed description of the invention of the present invention is described in further detail.With Lower embodiment is used for illustrating the present invention, but is not limited to the scope of the present invention.
Seeing Fig. 1, a kind of exhaust steam of electric power plant heat utilization system described in a preferred embodiment of the present invention, including boiler 1, steam turbine 2, condenser 3, heat pump 4, peak load calorifier 5 and secondary heat exchange station 6, described boiler 1 leads to Crossing air inlet pipe 7 to be connected with described steam turbine 2, described steam turbine 2 is by exhaustor 8 and described condenser 3 Connect, the air inlet pipe 7 of described steam turbine 2 connects and has extraction steam pipe 9, described condenser have outlet and return The mouth of a river, described heat pump has low-temperature heat source import, low-temperature heat source outlet, driving heat source import and condensed fluid and goes out Mouthful, the low-temperature heat source import 10 of described heat pump is connected with the outlet 11 of described condenser by pipeline, institute The low-temperature heat source outlet 12 stating heat pump is connected with the water return outlet 13 of described condenser by pipeline, described heat pump Driving heat source import 14 be connected with described extraction steam pipe 9, the condensate outlet 15 of described heat pump passes through pipeline It is connected to boiler 1, the service water outlet 16 of the described heat pump water inlet 17 by pipeline with described peak load calorifier Connect, the thermal source import 19 by pipeline with described secondary heat exchange station of the outlet 18 of described peak load calorifier Connecting, the thermal source outlet 20 at described secondary heat exchange station is connected for water inlet 21 with described heat pump, and described two The water inlet 22 of level heat exchange station is connected with the resource of water supply 23 of heating equipment by pipeline, described secondary heat exchange The outlet 24 stood is connected with described heating equipment 25.
Described steam turbine has low pressure (LP) cylinder, and described air inlet pipe is the low pressure that the low pressure (LP) cylinder with described steam turbine is connected Cylinder air induction conduit, described extraction steam pipe is connected with described low pressure (LP) cylinder air induction conduit.
The main member at described secondary heat exchange station is heat exchanger, and described heat exchanger is dividing wall type heat exchanger, accumulation of heat Formula heat exchanger, the one fluidly connected in indirect type heat exchanger, direct-contact heat exchanger and composite heat exchanger.
Described heat pump is lithium bromide absorption type heat pump.
Described condenser is water-cooled condenser or air cooling tubes condenser.Described condenser is dividing wall type condenser or connects Touch condenser.
The operation principle of the present invention is as follows: the present invention first passes through condenser and exhaust steam in steam turbine is condensed into low temperature Heat source water, heat pump is driving heat source by the steam of extraction steam turbine and recycles low from condenser Temperature-heat-source water, produces the hot water of middle megadyne temperature degree, then by peak load calorifier by further for the hot water of middle megadyne temperature degree Heat up, obtain the hot water that temperature is higher, water higher for this temperature is heated as the thermal source at secondary heat exchange station Supply water, thus obtain the water supply that watering equipment is temperature required, it is achieved the UTILIZATION OF VESIDUAL HEAT IN of steam turbine in thermal power plant exhaust steam.
The above is only the preferred embodiment of the present invention, is not limited to the present invention, it is noted that For those skilled in the art, on the premise of without departing from the technology of the present invention principle, also Can make some improvement and modification, these improve and modification also should be regarded as protection scope of the present invention.

Claims (6)

1. an exhaust steam of electric power plant heat utilization system, it is characterised in that: include boiler (1), steam turbine (2), Condenser (3), heat pump (4), peak load calorifier (5) and secondary heat exchange station (6), described boiler (1) Being connected with described steam turbine (2) by air inlet pipe (7), described steam turbine (2) passes through exhaustor (8) Being connected with described condenser (3), the upper connection of the air inlet pipe (7) of described steam turbine (2) has extraction steam pipe (9), Described condenser has outlet and water return outlet, described heat pump has low-temperature heat source import, low-temperature heat source exports, Driving heat source import and condensate outlet, the low-temperature heat source import (10) of described heat pump passes through pipeline with described The outlet (11) of condenser connects, and low-temperature heat source outlet (12) of described heat pump passes through pipeline with described The water return outlet (13) of condenser connects, the driving heat source import (14) of described heat pump and described extraction steam pipe (9) Connecting, the condensate outlet (15) of described heat pump is connected to boiler (1), the confession of described heat pump by pipeline Water out (16) is connected with the water inlet (17) of described peak load calorifier by pipeline, and described spike heats The outlet (18) of device is connected with the thermal source import (19) at described secondary heat exchange station by pipeline, and described two The thermal source outlet (20) of level heat exchange station is connected for water inlet (21) with described heat pump, described secondary heat exchange The water inlet (22) stood is connected with the resource of water supply (23) of heating equipment by pipeline, described secondary heat exchange The outlet (24) stood is connected with described heating equipment (25).
Exhaust steam of electric power plant heat utilization system the most according to claim 1, it is characterised in that: described steam turbine Having low pressure (LP) cylinder, described air inlet pipe is the low pressure (LP) cylinder air induction conduit that the low pressure (LP) cylinder with described steam turbine is connected, institute State extraction steam pipe to be connected with described low pressure (LP) cylinder air induction conduit.
Exhaust steam of electric power plant heat utilization system the most according to claim 1, it is characterised in that: described two grades are changed The main member of heat stations is heat exchanger, and described heat exchanger is dividing wall type heat exchanger, heat regenerator, fluid Connect the one in indirect type heat exchanger, direct-contact heat exchanger and composite heat exchanger.
Exhaust steam of electric power plant heat utilization system the most according to claim 1, it is characterised in that: described heat pump is Lithium bromide absorption type heat pump.
Exhaust steam of electric power plant heat utilization system the most according to claim 1, it is characterised in that: described condenser For water-cooled condenser or air cooling tubes condenser.
Exhaust steam of electric power plant heat utilization system the most according to claim 1, it is characterised in that: described condenser For dividing wall type condenser or contact condenser.
CN201610330428.1A 2016-05-18 2016-05-18 Utilization system of dead steam heat of power plant Pending CN105840256A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201610330428.1A CN105840256A (en) 2016-05-18 2016-05-18 Utilization system of dead steam heat of power plant

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Application Number Priority Date Filing Date Title
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Publications (1)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106765455A (en) * 2016-11-28 2017-05-31 中能服能源科技股份有限公司 A kind of energy-saving heat storage and heat supply system
CN113375209A (en) * 2021-06-28 2021-09-10 大唐环境产业集团股份有限公司 Large temperature difference heat supply method and system for coal-fired unit coupling compression heat pump

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN202532586U (en) * 2012-04-27 2012-11-14 北京华茂环能科技有限公司 System for improving waste heat efficiency of heat pump recovery plant cooling tower
CN203114364U (en) * 2013-03-11 2013-08-07 中国大唐集团环境技术有限公司 Waste-heat utilization device in electric power plant
CN104295364A (en) * 2014-10-15 2015-01-21 太原理工大学 Coal seam gas based residual heat resource distributed energy system
CN104975892A (en) * 2015-07-07 2015-10-14 中能世华(北京)节能科技有限公司 Heat pump waste heat recovery system
CN205638583U (en) * 2016-05-18 2016-10-12 中国大唐集团科学技术研究院有限公司 Exhaust steam thermal utilization system of power plant

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN202532586U (en) * 2012-04-27 2012-11-14 北京华茂环能科技有限公司 System for improving waste heat efficiency of heat pump recovery plant cooling tower
CN203114364U (en) * 2013-03-11 2013-08-07 中国大唐集团环境技术有限公司 Waste-heat utilization device in electric power plant
CN104295364A (en) * 2014-10-15 2015-01-21 太原理工大学 Coal seam gas based residual heat resource distributed energy system
CN104975892A (en) * 2015-07-07 2015-10-14 中能世华(北京)节能科技有限公司 Heat pump waste heat recovery system
CN205638583U (en) * 2016-05-18 2016-10-12 中国大唐集团科学技术研究院有限公司 Exhaust steam thermal utilization system of power plant

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106765455A (en) * 2016-11-28 2017-05-31 中能服能源科技股份有限公司 A kind of energy-saving heat storage and heat supply system
CN113375209A (en) * 2021-06-28 2021-09-10 大唐环境产业集团股份有限公司 Large temperature difference heat supply method and system for coal-fired unit coupling compression heat pump

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Application publication date: 20160810