CN201779765U - System capable of improving effectiveness of power plant by using steam extracted by extraction steam turbine to drive heat pump - Google Patents

System capable of improving effectiveness of power plant by using steam extracted by extraction steam turbine to drive heat pump Download PDF

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Publication number
CN201779765U
CN201779765U CN 201020183876 CN201020183876U CN201779765U CN 201779765 U CN201779765 U CN 201779765U CN 201020183876 CN201020183876 CN 201020183876 CN 201020183876 U CN201020183876 U CN 201020183876U CN 201779765 U CN201779765 U CN 201779765U
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water
heat
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inlet
pump
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CN 201020183876
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张军
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Beijing Zhongke Huayu Energy Technology Development Co Ltd
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Beijing Zhongke Huayu Energy Technology Development Co Ltd
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Abstract

The utility model relates to a heating system using steam extracted by an extraction steam turbine to drive a heat pump, the system mainly comprises a boiler, the extraction steam turbine, a condenser, a cooling water tower, a circulating water pump, a condensate pump, a low-pressure regenerative heater, a deaerator, a chemical water treatment device and a high-pressure regenerative heater, as well as an industrial steam turbine, an open type heat pump, a steam-water heat exchanger, a bypass valve and a water-water heat exchanger; on the one hand, the system uses the steam to directly drive the heat pump and recycles the energy which is taken away by circulating cooling water through the heat pump, on the other hand, the steam can heat the circulating water in a heating pipe network through the heat exchange in the heating season or heat condensate out of the condenser through the heat exchanger in the non-heating seasons after driving the heat pump, and finally becomes the condensate and returns into the boiler, no energy is released in vain during a series of processes, and the heat loss is thus minimized.

Description

Improve the system of efficiency of power plant with the steam drive heat pump of extraction turbine extraction
Technical field
The utility model belongs to the heat supply process field, particularly improves the system of efficiency of power plant with the steam drive heat pump of extracting out in the extraction turbine.
Background technology
At present a lot of steam power plants adopt extraction turbine to carry out cogeneration of heat and power, thereby from steam turbine, extract a part of steam out and provide heat supply for the user by the recirculated water that heat-exchanger rig heats heating network, the then pushing turbine generating of all the other steam, the steam of these pushing turbine generatings becomes the exhaust steam that can not do work again after by steam turbine acting generating, being recycled water quench during by condenser is to get back to boiler behind the aqueous water, and recirculated cooling water is taken away the heat in these exhaust steam by cooling tower and is discharged in the atmosphere.Because at present the maximal efficiency of steam turbine has only about 40%, the heat energy in the steam only has and changes useful electric energy about 40% into, and all the other 60% retains in the exhaust steam, and these energy recirculated water that is cooled is taken away, and is discharged in the atmosphere by cooling tower at last.Like this, not only a large amount of heat energy are discharged in the atmosphere, cause the significant wastage of energy and to the thermal pollution of air, and because cooling circulating water evaporation in a large number the time through cooling tower, cause a large amount of wastes of water resource, the water circulating pump of cooling water and the blower fan of cooling tower also will consume a large amount of electric energy simultaneously.
The existing system that utilizes the steam power plant that extraction turbine carries out cogeneration of heat and power as shown in Figure 1, this system comprises: boiler 1, extraction turbine 2, condenser 3, cooling tower 4, water circulating pump 5, condensate pump 6, low pressure bleeder heater 7, oxygen-eliminating device 8, Water Treatment device 9, high pressure bleeder heater 10, heat supply network heating heat exchanger 11; Its annexation is: the vapor outlet port of boiler 1 links to each other with the inlet of extraction turbine 2, and first outlet 21 of extraction turbine 2 links to each other with the inlet 31 of condenser 3, and second of extraction turbine 2 exports 22 and links to each other with the inlet of heat supply network heating heat exchanger 11; The outlet 32 of condenser 3 links to each other with the inlet of condensate pump 6; The outlet of condensate pump 6 links to each other with low pressure bleeder heater 7, oxygen-eliminating device 8, high pressure bleeder heater 10 successively; Oxygen-eliminating device 8 also links to each other with the outlet of Water Treatment device 9; Two other of condenser 3 imported and exported with cooling tower 4, water circulating pump 5 and connected into a cooling water circulation loop; Heat supply network heating heat exchanger 11 also links to each other with the outlet 32 of condenser 3.
The course of work of said system is: the steam that boiler 1 produces enters extraction turbine 2, extraction turbine 2 has two outlets: 2 (1) primary outlets for the steam that is used to generate electricity, 2 (2) is extraction opening, the steam that is used to generate electricity becomes after pushing turbine 2 generating and enters condenser 3 after the exhaust steam that can not do work is come out by primary outlet 2 (1), in condenser 3, be recycled water quench and be liquid condensate water, these condensate water enter by condensate pump 6 and enter oxygen-eliminating device 8 after low pressure bleeder heater 7 is heated, in oxygen-eliminating device 8, enter high pressure bleeder heater 10 after the deoxygenation, entered boiler after the heating once more in high pressure bleeder heater 10, the steam of extracting out from the extraction opening 2 (2) of extraction turbine 2 enters heat supply network heating heat exchanger 11 water the heating network is heated.And the heat of a large amount of low taste that exhaust steam contained that the steam that is used for generating electricity forms in pushing turbine 2 generating back is recycled cooling water and takes away, discharge into the atmosphere by cooling tower 4, like this, not only a large amount of heat energy are discharged in the atmosphere, cause the significant wastage of energy and to the thermal pollution of air, and because cooling circulating water evaporation in a large number the time through cooling tower, cause a large amount of wastes of water resource, the water circulating pump of cooling water and the blower fan of cooling tower also will consume a large amount of electric energy simultaneously.
Summary of the invention
The purpose of this utility model is for overcoming the weak point of prior art, proposes a kind ofly to improve the system of efficiency of power plant with the steam drive heat pump of extracting out in the extraction turbine, and the utility model is discharged in vain without any energy, and thermal loss is reduced.
The heating system of the steam drive heat pump of extracting out with extraction turbine that the utility model proposes, this system mainly comprises: boiler, extraction turbine, condenser, cooling tower, water circulating pump, condensate pump, low pressure bleeder heater, oxygen-eliminating device, Water Treatment device, high pressure bleeder heater; It is characterized in that, also comprise industrial steam turbine, open-type heat pump, vapor-water heat exchanger, by-passing valve, water water-to-water heat exchanger; Its annexation is: the outlet of boiler links to each other with the inlet of extraction turbine, the primary outlet of extraction turbine links to each other with the heat of condenser inlet, the heat outlet of condenser links to each other with the inlet of condensate pump, the cold outlet of condenser links to each other with the cold inlet of open-type heat pump with the inlet of cooling tower respectively, the outlet of cold outlet of open-type heat pump and cooling tower all links to each other with the inlet of water circulating pump, the recirculated water delivery side of pump links to each other with the cold inlet of condenser, the condensate water delivery side of pump links to each other by the inlet of by-passing valve with the low pressure bleeder heater, the outlet of low pressure bleeder heater links to each other with the inlet of oxygen-eliminating device, the outlet of oxygen-eliminating device links to each other with the inlet of high pressure bleeder heater, the outlet of high pressure bleeder heater links to each other with the inlet of boiler, and oxygen-eliminating device also links to each other with the Water Treatment device; The extraction opening of extraction turbine links to each other with the industrial steam turbine inlet, the industrial steam turbine outlet links to each other with the heat inlet of vapor-water heat exchanger, the heat outlet of vapor-water heat exchanger links to each other with the inlet of condensate pump, the cold inlet of vapor-water heat exchanger links to each other with the outlet of the heat of open-type heat pump, the heat inlet of open-type heat pump links to each other with the heating network backwater with the heat outlet of water water-to-water heat exchanger respectively, the cold outlet of vapor-water heat exchanger is supplied water with heating network with the heat inlet of water water-to-water heat exchanger respectively and is linked to each other, the cold inlet of water water-to-water heat exchanger links to each other with the condensate water delivery side of pump, and the cold outlet of water water-to-water heat exchanger links to each other with the inlet of low pressure bleeder heater; Industrial steam turbine links to each other with the open-type heat pump by shaft joint.
Technical characterstic of the present utility model and beneficial effect:
The utility model system directly drives heat pump with steam on the one hand, reclaim the energy (heat energy in the exhaust steam that can not do work again after the generating just) that is recycled cooling water and takes away by heat pump, steam is after driving heat pump on the other hand, heating season (winter) is by the recirculated water of heat exchanger heating heating network, non-heating (the spring in season, summer and autumn) condensate water of coming out from condenser by heat exchanger heating, becoming condensed water at last gets back in the boiler, like this, the energy of extracting out in the steam that drives heat pump from extraction turbine is divided into three parts: 1, drive the heat pump recovery waste heat; 2, recirculated water in the heating heating network or the condensate water of coming out from condenser; 3, get back to boiler with condensed water, in these a series of processes, discharged in vain, make the thermal loss minimum without any energy.
Description of drawings
Fig. 1 is conventional extraction turbine power generation and heat supply system architecture and workflow schematic diagram.
Fig. 2 is the utility model improves efficiency of power plant with the steam drive heat pump of extraction turbine extraction system architecture and a workflow schematic diagram.
The specific embodiment
The method structure drawings and Examples that the steam drive heat pump with the extraction turbine extraction that the utility model proposes carries out heat supply are described in detail as follows:
Structure of the present utility model as shown in Figure 1, this system mainly comprises: boiler 1, extraction turbine 2, condenser 3, cooling tower 4, water circulating pump 5, condensate pump 6, low pressure bleeder heater 7, oxygen-eliminating device 8, Water Treatment device 9, high pressure bleeder heater 10; It is characterized in that, also comprise industrial steam turbine 12, open-type heat pump 13, vapor-water heat exchanger 14, by-passing valve 15, heat exchanger 16; Its annexation is: the outlet of boiler 1 links to each other with the inlet of extraction turbine 2, the outlet 21 of extraction turbine 2 (for the primary outlet of the steam that is used to generate electricity) links to each other with the heat inlet 31 of condenser 3, the heat of condenser 3 outlet 32 links to each other with the inlet of condensate pump 6, the cold outlet 33 of condenser 3 links to each other with open-type heat pump 13 cold inlets 131 with the inlet of cooling tower 4 respectively, the outlet of 13 cold outlets 132 of open-type heat pump and cooling tower 4 all links to each other with the inlet of water circulating pump 5, the outlet of water circulating pump 5 links to each other with the cold inlet 34 of condenser 3, the outlet of condensate pump 6 links to each other with the inlet of low pressure bleeder heater 7 by by-passing valve 15, the outlet of low pressure bleeder heater 7 links to each other with the inlet of oxygen-eliminating device 8, the outlet of oxygen-eliminating device 8 links to each other with the inlet of high pressure bleeder heater 10, the outlet of high pressure bleeder heater 10 links to each other with the inlet of boiler 1, and oxygen-eliminating device 8 also links to each other with Water Treatment device 9; The extraction opening 22 of extraction turbine 2 (being extraction opening) links to each other with industrial steam turbine 12 inlets, industrial steam turbine 12 outlets link to each other with the heat inlet 141 of vapor-water heat exchanger 14, the heat of vapor-water heat exchanger 14 outlet 142 links to each other with the inlet of condensate pump 6, the cold inlet 143 of vapor-water heat exchanger 14 links to each other with the heat of open-type heat pump 13 outlet 134, the heat of open-type heat pump 13 inlet 133 links to each other with the heating network backwater with the heat outlet 162 of water water-to-water heat exchanger 16 respectively, the cold outlet 144 of vapor-water heat exchanger 14 is supplied water with heating network with the heat inlet 161 of water water-to-water heat exchanger 16 respectively and is linked to each other, the cold inlet 163 of water water-to-water heat exchanger 16 links to each other with the condensate water delivery side of pump, and the cold outlet 164 of water water-to-water heat exchanger 16 links to each other with the inlet of low pressure bleeder heater 7; Industrial steam turbine 12 links to each other with open-type heat pump 13 by (himself has) shaft joint; The rotation of industrial steam turbine can drive the motion of compressor in the open-type heat pump machine by shaft joint, thereby drives the work of open-type heat pump machine.
The course of work of the present utility model is: the steam of extracting out from the extraction opening 22 of extraction turbine 2 enters industrial steam turbine 12, industrial steam turbine 12 drives open-type source pump 13, the cold import that the cooling circulating water that is come out by the cold outlet 33 of condenser 3 enters open-type heat pump 13, come out to get back to condenser 3 from the cold outlet of heat pump after being cooled by water circulating pump 5, heat supply network backwater (heating season) or the recirculated water (non-heating season) that exports out from water water-to-water heat exchanger 16 heat enter heat pump from the hot import of heat pump 13, be heated and enter vapor-water heat exchanger 14 after back heat from heat pump 13 exports out, come out to enter heat supply network heat supply (heating season) or enter water water-to-water heat exchanger 16 heat-setting water after the heating once more.Like this, directly drive heat pump with steam on the one hand, reclaim the energy (heat energy in the exhaust steam that can not do work again after the generating just) that is recycled cooling water and takes away by heat pump, steam is after driving heat pump on the other hand, heating season (winter) is by the recirculated water of heat exchanger heating heating network, the condensate water that non-heating season comes out from condenser by the heat exchanger heating, becoming condensed water at last gets back in the boiler, like this, the energy of extracting out in the steam that drives heat pump from extraction turbine is divided into three parts: 1, drive the heat pump recovery waste heat; 2, recirculated water in the heating heating network or the condensate water of coming out from condenser; 3, get back to boiler with condensed water, in these a series of processes, discharged in vain, thermal loss is reduced without any energy.
The embodiment of the utility model capital equipment is respectively described below:
1) boiler 1: power plant has boiler now
2) extraction turbine 2: the existing steam turbine of power plant, extract the steam turbine that steam is supplied with hot user out from intergrade, and extraction pressure is decided according to user's the needs and the requirement of product line, can adjust within the specific limits.
3) condenser 3, cooling tower 4, water circulating pump 5, condensate pump 6, low pressure bleeder heater 7, oxygen-eliminating device 8, Water Treatment device 9, high pressure bleeder heater 10 are the existing equipment of power plant.
4) industrial steam turbine 12, are the rotary power machinery that the power conversion of steam is become mechanical power, are conventional heat supply products, and himself has shaft joint.
5) the open-type heat pump 13:
Heat pump is the principle according to contrary Carnot cycle, by importing a spot of high-grade energy, from a kind of device of occurring in nature extraction low-grade energy, is a kind of matured product.
6) vapor-water heat exchanger 14:
A kind of heat exchanger product of maturation, such heat exchanger one end medium is a water, other end medium is steam or steam water interface, steam or steam water interface can be cooled to water by it, simultaneously the WATER AS FLOW MEDIUM of the heat transferred other end.
7) the water water-to-water heat exchanger 16
A kind of heat exchanger product of maturation, such heat exchanger two ends medium is water, and heat can pass to the lower water of temperature by the higher water of temperature by such heat exchanger.

Claims (1)

1. a steam drive heat pump of extracting out with extraction turbine improves the system of efficiency of power plant, and this system mainly comprises: boiler, extraction turbine, condenser, cooling tower, water circulating pump, condensate pump, low pressure bleeder heater, oxygen-eliminating device, Water Treatment device, high pressure bleeder heater; It is characterized in that this system also comprises industrial steam turbine, open-type heat pump, vapor-water heat exchanger, by-passing valve, water water-to-water heat exchanger; Wherein, the outlet of boiler links to each other with the inlet of extraction turbine, the primary outlet of extraction turbine links to each other with the heat of condenser inlet, the heat outlet of condenser links to each other with the inlet of condensate pump, the cold outlet of condenser links to each other with the cold inlet of open-type heat pump with the inlet of cooling tower respectively, the outlet of cold outlet of open-type heat pump and cooling tower all links to each other with the inlet of water circulating pump, the recirculated water delivery side of pump links to each other with the cold inlet of condenser, the condensate water delivery side of pump links to each other by the inlet of by-passing valve with the low pressure bleeder heater, the outlet of low pressure bleeder heater links to each other with the inlet of oxygen-eliminating device, the outlet of oxygen-eliminating device links to each other with the inlet of high pressure bleeder heater, the outlet of high pressure bleeder heater links to each other with the inlet of boiler, and oxygen-eliminating device also links to each other with the Water Treatment device; The extraction opening of extraction turbine links to each other with the industrial steam turbine inlet, the industrial steam turbine outlet links to each other with the heat inlet of vapor-water heat exchanger, the heat outlet of vapor-water heat exchanger links to each other with the inlet of condensate pump, the cold inlet of vapor-water heat exchanger links to each other with the outlet of the heat of open-type heat pump, the heat inlet of open-type heat pump links to each other with the heating network backwater with the heat outlet of water water-to-water heat exchanger respectively, the cold outlet of vapor-water heat exchanger is supplied water with heating network with the heat inlet of water water-to-water heat exchanger respectively and is linked to each other, the cold inlet of water water-to-water heat exchanger links to each other with the condensate water delivery side of pump, and the cold outlet of water water-to-water heat exchanger links to each other with the inlet of low pressure bleeder heater; Industrial steam turbine links to each other with the open-type heat pump by shaft joint.
CN 201020183876 2010-04-30 2010-04-30 System capable of improving effectiveness of power plant by using steam extracted by extraction steam turbine to drive heat pump Expired - Lifetime CN201779765U (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101852459A (en) * 2010-04-30 2010-10-06 北京中科华誉能源技术发展有限责任公司 System for improving efficiency of power plant by driving heat pump with steam extracted from extraction steam turbine
CN102353237A (en) * 2011-08-18 2012-02-15 西安交通大学 High-moisture-content lignite predrying method and system integrated with thermal power plant
CN103363564A (en) * 2013-08-02 2013-10-23 山东电力工程咨询院有限公司 Energy-saving heat supplying system and heat supplying method capable of improving low-grade steam heat utilization efficiency
CN105157398A (en) * 2015-07-13 2015-12-16 华北电力大学 Two-stage raw coal drying system and method applied to air cooling unit

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101852459A (en) * 2010-04-30 2010-10-06 北京中科华誉能源技术发展有限责任公司 System for improving efficiency of power plant by driving heat pump with steam extracted from extraction steam turbine
CN102353237A (en) * 2011-08-18 2012-02-15 西安交通大学 High-moisture-content lignite predrying method and system integrated with thermal power plant
CN102353237B (en) * 2011-08-18 2013-12-11 西安交通大学 High-moisture-content lignite predrying method and system integrated with thermal power plant
CN103363564A (en) * 2013-08-02 2013-10-23 山东电力工程咨询院有限公司 Energy-saving heat supplying system and heat supplying method capable of improving low-grade steam heat utilization efficiency
CN103363564B (en) * 2013-08-02 2016-06-22 山东电力工程咨询院有限公司 Improve energy-saving heating system and the heat supply method of low-grade steam thermal energy utilization ratio
CN105157398A (en) * 2015-07-13 2015-12-16 华北电力大学 Two-stage raw coal drying system and method applied to air cooling unit
CN105157398B (en) * 2015-07-13 2018-05-25 华北电力大学 It is a kind of suitable for the two-stage raw coal drying system of air cooling unit and raw coal drying means

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Legal Events

Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant
EE01 Entry into force of recordation of patent licensing contract

Assignee: Shenyang Huayu Ground-Source Heat Pump Heating Co., Ltd.

Assignor: Beijing Zhongke Huayu Energy Technology Development Co., Ltd.

Contract record no.: 2011110000142

Denomination of utility model: System for improving efficiency of power plant by driving heat pump with steam extracted from extraction steam turbine

Granted publication date: 20110330

License type: Exclusive License

Record date: 20110819

AV01 Patent right actively abandoned

Granted publication date: 20110330

Effective date of abandoning: 20111130