CN103775140A - Improved electricity generation system with pump assisting in condensing and cooling and electricity generation method of electricity generation system - Google Patents

Improved electricity generation system with pump assisting in condensing and cooling and electricity generation method of electricity generation system Download PDF

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Publication number
CN103775140A
CN103775140A CN201210548989.0A CN201210548989A CN103775140A CN 103775140 A CN103775140 A CN 103775140A CN 201210548989 A CN201210548989 A CN 201210548989A CN 103775140 A CN103775140 A CN 103775140A
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steam
heat
heat pump
generation system
electricity generation
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CN201210548989.0A
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Chinese (zh)
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苟仲武
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苟仲武
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Abstract

The invention discloses an improved electricity generation system with a pump assisting in condensing and cooling and an electricity generation method of the electricity generation system. The improved electricity generation system with the pump assisting in condensing and cooling comprises a boiler, a steam turbine, a steam condenser, a heat pump compressor, an evaporator, a condensator and a cooling tower, wherein the boiler, the steam turbine, the steam condenser and the condenator are connected in sequence through pipelines, and the evaporator and the cooling tower are respectively provided with a cold water pipeline and a hot water pipeline so as to form independent circulating loops connected with the steam condenser. According to the improved electricity generation system with the pump assisting in condensing and cooling and the electricity generation method of the electricity generation system, waste steam and hot steam discharged by the steam turbine are simultaneously cooled and condensed by means of the heat pump technology and the cooling tower, condensing efficiency is improved, the heat pump is used for transferring heat in the hot steam discharged by the steam turbine at the same time, the heat is used for converting liquefied steam into high-temperature condensed liquid or low-pressure steam again, and the high-temperature condensed liquid or the low-pressure steam is supplied into the boiler; thus, the heat is fully used, heat emission is reduced, the condensing effect of the steam condenser is improved, the output power of the steam turbine is improved, and electricity generation cost is reduced by increasing the thermoelectric conversion rate and recycling the heat.

Description

The auxiliary cooling power generation system of condensing of modified model heat pump and electricity-generating method thereof
Technical field
The present invention relates to a kind of steamer power generation system, particularly relate to the auxiliary cooling power generation system of condensing of modified model heat pump.
The invention still further relates to the method that uses the cooling power generation system generating of the auxiliary condensing of above-mentioned modified model heat pump.
  
Background technique
Power generation system is a kind of machine that mechanical energy is changed into electric energy, conventionally by steam turbine, water turbine or internal combustion engine drive.By the power generation system of Steam Turbine Driven, the superheated vapor being produced by boiler enters in steam turbine and expands and do work, make blade rotation and drive power generation system generating, the waste vapour after acting through vapour condenser, circulating water pump, condensate pump, send boiler back to water heater etc. and recycle.
The high temperature hot steam of discharging for steamer power generation system in prior art generally adopts water-cooled or air cooling.Cooling procedure is the process of changing between the used heat of system discharge and the energy of environment.The heat-transfer coefficient of water-cooled is 1762W(m 2k), to do the heat-transfer coefficient of cooling medium be 62W(m to air 2k).Heat-transfer coefficient has characterized the intensity of diabatic process, and the larger diabatic process of numerical value is stronger.Because air cooling system heat-transfer coefficient is little, economic efficacy is poor, therefore mainly adopts at present water cooling system.
Water cooling system need to consume a large amount of Water Energy as cooling water, and the heat in water-cooled or the air-cooled high-temperature steam that all steam turbine can be discharged be taken away, the thermal efficiency of thermal power generation on average only has 35%-40% according to statistics, and a large amount of used heat is taken away and produced to the energy major part system of being cooled, reduce the utilization ratio of heat.Although can utilize by collection for the used heat of discharging, but power station is often distant apart from urban district, need to be by waste heat to very high temperature of discharge, and then from be transported to urban district heat exchange station from power station, because transport temperature is a lot of higher than ambient temperature, therefore serious heat loss in transportation process, and thermal expansion is cooling has relatively high expectations to pipeline and relevant device, thereby causes the used heat that cannot effectively utilize discharge.
In addition because the design for cooling tower in prior art does not take into full account ambient temperature effect, often cause during the broiling summer, cooling effect declines, in vapour condenser, overpressure causes generating efficiency to decline, build new cooling system if redesigned, spend higher, thereby and the long economic loss that causes of engineering time, if do not transformed, under generating efficiency, thus waste mass energy.
Summary of the invention
The present invention completes in order to solve above deficiency of the prior art, the present invention is lowered the temperature, condenses the hot steam of discharge by heat pump techniques auxiliary cooling tower, and by heat pump by the transfer of heat in the hot steam of discharging in steam turbine, use this heat by the concurrent heating of condensation after heat steam condensate, and then again add in boiler, thereby the heat in part or all of exhaust steam, the steam that again utilizes steam turbine discharge, minimizing hot driving, reduced cost of electricity-generating by having improved cooling condensing effect and heat energy recycle.And because power generation system structure of the present invention is simple, therefore can form by existing cooling system being carried out to simple transformation, and greatly improve the cooling effectiveness of existing cooling system.Thereby degradation series of problems under the generating efficiency that efficiently solve power plant in the situation that cost is lower in, cooling tower is aging, designed capacity is not enough to be caused, and heat pump cooling system of the present invention and water tower cooling system are independent separately, therefore the refrigerant in heat pump can be selected to adopt in freon, water, ethylene glycol, R22, R134a, R415b, R417a, R245FA, R123, R141 any according to actual needs, thereby further improves heat pump cooling effectiveness.
By suitable increasing heat pump compressor group power, reduce the effect of cooling tower heat radiation, can realize full heat recovery recycling, until realize heat energy zero-emission.
The auxiliary cooling power generation system of condensing of modified model heat pump of the present invention is characterized in that: the auxiliary cooling power generation system of condensing of described modified model heat pump comprises boiler, steam turbine, vapour condenser, heat pump compressor, vaporizer, condenser, cooling tower, wherein said boiler, steam turbine, vapour condenser, condenser are connected successively by pipeline, and described vaporizer all has cold water pipes with cooling tower and is connected with vapour condenser with the independent circulation circuit that hot water pipeline forms.
Described heat pump compressor is arranged between condenser and vaporizer, and connects by pipeline, forms compression heat pump system.
The present invention also comprises the electricity-generating method that uses the auxiliary cooling power generation system of condensing of above-mentioned modified model heat pump, it is characterized in that: comprise the following steps:
Step 1, heating boiler, makes water in the boiler generation steam that is heated, and steam enters steam turbine by pipeline, and steam turbine outputting power makes generator produce electric power;
Step 2, the hot steam of discharging in steam turbine enters in vapour condenser by pipeline, the cold water pipe of vaporizer enters vapour condenser, and the heat of the hot steam of discharge is partially absorbed and taken away, cold water after the intensification of discharging is refluxed and is entered vaporizer by hot water pipeline, the refrigerant medium of heat pump in vaporizer by heat exchange, absorb heat in the cold water after heating up, work by heat pump compressor, heat in refrigerant is emitted in condenser, again become hot steam and enter steam turbine being conveyed into boiler after the condensate return heating of discharging in vapour condenser, the generating of steam turbine outputting power:
Step 3, the cold water in cooling tower enters vapour condenser by cold water pipes, and absorbs the exhaust steam of discharging in steam turbine, the heat of hot steam, and makes it to condense, and discharges and return cooling tower from hot water pipeline, after supercooling, again enters vapour condenser from cold water pipes:
Described refrigerant medium is any one in freon, water, ethylene glycol, R22, R134a, R415b, R245FA, R123, R141 or R417a.
The present invention passes through with heat pump techniques heat generation transportation, in condenser, the auxiliary hot steam to discharge is lowered the temperature, condense, and by heat pump by the transfer of heat in the hot steam of discharging in steam turbine, use this heat by the concurrent heating of condensation after heat steam condensate, and again add in boiler and recycle, thereby make full use of the heat in the steam of steam turbine discharge, reduce hot driving, cooling effect improves also can strengthen vapour condenser condensing effect, improve steam turbine output power, reduce cost of electricity-generating by improving thermoelectricity conversion ratio and two aspects of heat energy recycle.
  
Accompanying drawing explanation
Fig. 1 heat of the present invention is improved the auxiliary cooling power generation system of condensing of heat pump
Figure number explanation
1 ... boiler 2 ... steam turbine 3 ... vapour condenser
4 ... cooling tower 5 ... cold water pipes 6 ... hot water pipeline
7 ... hot water pipeline 8 ... cold water pipes 9 ... vaporizer
10 ... heat pump compressor 11 ... condenser
Embodiment
Heat pump compressor of the present invention is arranged between condenser and vaporizer, is connected with condenser by pipeline with vaporizer, forms typical compression heat pump system, belongs to conventional heat pump in related domain, is no longer described in detail in this article.
Be described in further detail below in conjunction with the auxiliary cooling power generation system of condensing of Fig. 1 improvement of the present invention type heat pump of accompanying drawing and the method for utilizing this power generation system to generate electricity.
Hot modified model heat pump of the present invention is assisted the cooling power generation system of condensing, please refer to Fig. 1, the auxiliary cooling power generation system of condensing of modified model heat pump of the present invention is characterized in that: the auxiliary cooling power generation system of condensing of described modified model heat pump comprises boiler 1, steam turbine 2, vapour condenser 3, heat pump compressor 10, vaporizer 9, condenser 11, cooling tower 4, wherein said boiler 1, steam turbine 2, vapour condenser 3, condenser 11 are connected successively by pipeline, and described vaporizer 9 all has cold water pipes with cooling tower 4 and is connected with vapour condenser 3 with the independent circulation circuit that hot water pipeline forms.
In the further embodiment of the present invention, described heat pump compressor 10 is arranged between condenser 11 and vaporizer 9, and connects (pipeline does not draw in the drawings) by pipeline, forms compression heat pump system.
The invention also discloses the method for utilizing the auxiliary cooling power generation system of condensing of above-mentioned modified model heat pump to generate electricity, with reference to figure 1, it comprises the following steps:
Step 1, heating boiler 1, makes water in the boiler 1 generation steam that is heated, and steam enters steam turbine 2 by pipeline, and steam turbine 2 outputting powers make generator produce electric power;
Step 2, the exhaust steam of discharging in steam turbine 2, hot steam enters in vapour condenser 3 by pipeline, the cold water pipes 8 of vaporizer 9 enters vapour condenser 3, and by the exhaust steam of discharging, the heat of hot steam partially absorbs and takes away and makes steam condensation, cold water after the intensification of discharging enters vaporizer 9 by hot water pipeline 6, heat pump compressor 10 is worked, in heat pump, refrigerant is by heat exchange, the heat of cold water after heating up is passed to condenser 11, in condenser 11, refrigerant is emitted heat, again become hot steam and enter steam turbine 2 being conveyed into boiler 1 after the condensate return heating of discharging in vapour condenser 3, steam turbine 2 outputting power generatings:
Step 3, the cold water in cooling tower 4 enters vapour condenser 3 by cold water pipes 5, and absorbs the exhaust steam of discharging in steam turbine, the heat of steam, discharges and return cooling tower 4 from hot water pipeline 7, after supercooling, again enters vapour condenser 3 from cold water pipes 5.
In the further preferred embodiment of the present invention, described refrigerant is freon, water, ethylene glycol, R22, R134a, R415b, R245FA, R123, any one in R141 or R417a.
From above-mentioned mode of execution, the present invention passes through with heat pump techniques heat generation transportation, in condenser, the auxiliary hot steam to discharge is lowered the temperature, is condensed, and by heat pump by the transfer of heat in the hot steam of discharging in steam turbine, use this heat by the concurrent heating of condensation after heat steam condensate, and again add in boiler and recycle, thereby make full use of heat in the steam of steam turbine discharge, reduce hot driving, by having improved cooling effect and energy recovery recycling, reduce cost of electricity-generating.
Above-mentionedly only several specific embodiments in the present invention are illustrated; but can not serve as protection scope of the present invention; every equivalence variation of having done according to the design spirit in the present invention or modification or equal proportion zoom in or out etc., all should think and fall into protection scope of the present invention.

Claims (4)

1. the auxiliary cooling power generation system of condensing of modified model heat pump, it is characterized in that: the auxiliary cooling power generation system of condensing of described modified model heat pump comprises boiler, steam turbine, vapour condenser, heat pump compressor, vaporizer, condenser, cooling tower, wherein said boiler, steam turbine, vapour condenser, condenser are connected successively by pipeline, and described vaporizer all has cold water pipes with cooling tower and is connected with vapour condenser with the independent circulation circuit that hot water pipeline forms.
2. the auxiliary cooling power generation system of condensing of modified model heat pump according to claim 1 is characterized in that: described heat pump compressor is arranged between condenser and vaporizer, and connects by pipeline, forms compression heat pump system.
3. the electricity-generating method of the auxiliary cooling power generation system of condensing of the modified model heat pump described in claim 1 or 2, is characterized in that: comprise the following steps:
Step 1, heating boiler, makes water in the boiler generation steam that is heated, and steam enters steam turbine by pipeline, and steam turbine outputting power makes generator produce electric power;
Step 2, the hot steam of discharging in steam turbine enters in vapour condenser by pipeline, the cold water pipe of vaporizer enters vapour condenser, and the heat of the hot steam of discharge is partially absorbed and taken away, cold water after the intensification of discharging is refluxed and is entered vaporizer by hot water pipeline, the refrigerant medium of heat pump in vaporizer by heat exchange, absorb heat in the cold water after heating up, work by heat pump compressor, heat in refrigerant is emitted in condenser, again become hot steam and enter steam turbine being conveyed into boiler after the condensate return heating of discharging in vapour condenser, the generating of steam turbine outputting power,
Step 3, the cold water in cooling tower enters vapour condenser by cold water pipes, and absorbs the exhaust steam of discharging in steam turbine, the heat of hot steam, and makes it to condense, and discharges and return cooling tower from hot water pipeline, after supercooling, again enters vapour condenser from cold water pipes.
4. the electricity-generating method of the auxiliary cooling power generation system of condensing of modified model heat pump according to claim 3 is characterized in that: described refrigerant medium is any one in freon, water, ethylene glycol, R22, R134a, R415b, R245FA, R123, R141 or R417a.
CN201210548989.0A 2012-12-18 2012-12-18 Improved electricity generation system with pump assisting in condensing and cooling and electricity generation method of electricity generation system Withdrawn CN103775140A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110966798A (en) * 2019-12-20 2020-04-07 上海核工程研究设计院有限公司 Novel power plant energy comprehensive utilization non-temperature drainage thermodynamic system
CN112028442A (en) * 2020-07-16 2020-12-04 北京国电龙源环保工程有限公司 Sludge drying system and drying method utilizing multi-section type heat energy in stepped mode
CN112727558A (en) * 2019-10-28 2021-04-30 国网安徽省电力有限公司电力科学研究院 Heat storage power generation system and method
CN113432143A (en) * 2021-07-06 2021-09-24 胜利国电(东营)热电有限公司 Low-temperature flue gas waste heat recovery system

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JPH03906A (en) * 1989-05-26 1991-01-07 Kawasaki Heavy Ind Ltd Feed water preheating method and device in steam generating plant
CN101140105A (en) * 2007-09-25 2008-03-12 西安交通大学 Indoor air source double compressors household heat pump water heater
CN201059819Y (en) * 2007-07-12 2008-05-14 北京开源铭典技术有限公司 Steam turbine driven open-type heat pump device
CN201705401U (en) * 2010-07-05 2011-01-12 双良节能系统股份有限公司 Concentrative heat supply system for recovering condensation heat of indirect air-cooled unit of power plant
CN101967999A (en) * 2010-09-25 2011-02-09 北京联合优发能源技术有限公司 Combined heat and power generation energy saving device using afterheat to supply heat and energy saving method
CN203067039U (en) * 2012-12-18 2013-07-17 苟仲武 Improved type generation system with heat pump assisting in cooling condensed steam

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03906A (en) * 1989-05-26 1991-01-07 Kawasaki Heavy Ind Ltd Feed water preheating method and device in steam generating plant
CN201059819Y (en) * 2007-07-12 2008-05-14 北京开源铭典技术有限公司 Steam turbine driven open-type heat pump device
CN101140105A (en) * 2007-09-25 2008-03-12 西安交通大学 Indoor air source double compressors household heat pump water heater
CN201705401U (en) * 2010-07-05 2011-01-12 双良节能系统股份有限公司 Concentrative heat supply system for recovering condensation heat of indirect air-cooled unit of power plant
CN101967999A (en) * 2010-09-25 2011-02-09 北京联合优发能源技术有限公司 Combined heat and power generation energy saving device using afterheat to supply heat and energy saving method
CN203067039U (en) * 2012-12-18 2013-07-17 苟仲武 Improved type generation system with heat pump assisting in cooling condensed steam

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112727558A (en) * 2019-10-28 2021-04-30 国网安徽省电力有限公司电力科学研究院 Heat storage power generation system and method
CN110966798A (en) * 2019-12-20 2020-04-07 上海核工程研究设计院有限公司 Novel power plant energy comprehensive utilization non-temperature drainage thermodynamic system
CN112028442A (en) * 2020-07-16 2020-12-04 北京国电龙源环保工程有限公司 Sludge drying system and drying method utilizing multi-section type heat energy in stepped mode
CN113432143A (en) * 2021-07-06 2021-09-24 胜利国电(东营)热电有限公司 Low-temperature flue gas waste heat recovery system

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Application publication date: 20140507