CN102620478A - Method and device for improving thermal circulation efficiency - Google Patents
Method and device for improving thermal circulation efficiency Download PDFInfo
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- CN102620478A CN102620478A CN2012101103951A CN201210110395A CN102620478A CN 102620478 A CN102620478 A CN 102620478A CN 2012101103951 A CN2012101103951 A CN 2012101103951A CN 201210110395 A CN201210110395 A CN 201210110395A CN 102620478 A CN102620478 A CN 102620478A
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- condenser
- heat
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- 238000000034 method Methods 0.000 title claims abstract description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 34
- 239000006096 absorbing agent Substances 0.000 claims abstract description 32
- 238000010521 absorption reaction Methods 0.000 claims abstract description 14
- 239000007788 liquid Substances 0.000 claims abstract description 6
- 238000001816 cooling Methods 0.000 claims description 15
- 239000012530 fluid Substances 0.000 claims description 12
- 230000002745 absorbent Effects 0.000 claims description 9
- 239000002250 absorbent Substances 0.000 claims description 9
- 239000003507 refrigerant Substances 0.000 claims description 9
- 239000002826 coolant Substances 0.000 abstract 5
- 238000002347 injection Methods 0.000 abstract 2
- 239000007924 injection Substances 0.000 abstract 2
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 239000000243 solution Substances 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- AMXOYNBUYSYVKV-UHFFFAOYSA-M lithium bromide Chemical compound [Li+].[Br-] AMXOYNBUYSYVKV-UHFFFAOYSA-M 0.000 description 2
- 239000003245 coal Substances 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 230000001351 cycling effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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- 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
- Y02E20/14—Combined heat and power generation [CHP]
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- Engine Equipment That Uses Special Cycles (AREA)
Abstract
Provided are a method and a device for improving thermal circulation efficiency. The method sends dead steam of a turbine into a condenser to exchange heat with coolant water in the condenser, temperature of the coolant water in an evaporator is decreased, the dead steam condensed and cooled flows into the condenser and then flows into a steam generator or a boiler to be warmed and pressurized, high temperature steam exhausted from the boiler or pumped from the turbine enters a generator to enable solution in the generator to be generated, generated coolant steam flows into the condenser, condensed coolant further enters the evaporator to be evaporated again and injected into the generator through an absorption circulation pump and an injection pump, and generated thick absorption liquid flow into an absorber and then enters the generator again with the coolant steam through the absorption circulation pump and the injection pump. The invention further comprises the device for improving thermal circulation efficiency of thermal power plants or nuclear power plants. The method and the device can reduce running cost, improve thermal circulation efficiency and have no pollution on the environment.
Description
Technical field
The present invention relates to a kind of method and device that is used for steam power plant or nuclear power plant's raising efficiency of thermal cycle.
Background technology
Current steam power plant or nuclear power plant generally circulate, improve steam parameter, adopt resuperheat to circulate, adopt duplexing matter combined cycle, these five aspects of implementation cogeneration of heat and power to consider from employing feedwater backheat in order to improve efficiency of thermal cycle.
Adopt the circulation of feedwater backheat: the steam of the acting of will in steam turbine, expanding, under a certain suitable parameters, from steam turbine, extract a part out, and heat the feedwater of being sent to boiler with this part steam.Compare with pure condensation cycle; Row gives the thermal loss of low-temperature receiver smaller in the backheat circulation, because the heat energy of that part of steam of from steam turbine, releasing is used to heated feed water fully, no longer constitutes cold source energy; Get into the corresponding minimizing of heat of condenser, thereby improve efficiency of thermal cycle.To the steam-turbine plant of different steam inlet conditions, the best backheat amount (often representing with optimum feed temperature) of drawing gas is arranged respectively all.The drawing gas normally of heated feed water repeatedly extracted out on steam turbine different pressures point and will feed water step by step and heat.Like this, with the feedwater of heating lower temperature earlier of drawing gas of lower temperature, this part draws gas just can do a little merits more in steam turbine, thereby further improves the thermal efficiency of device.In theory, the progression of feedwater backheat is many more, and the device thermal efficiency also just improves many more.But too much backheat progression can increase the equipment investment expense.
The circulation of employing resuperheat: (temperature and pressure all decreases the steam of the acting of will having expanded at the high-pressure section (normally in the high pressure cylinder) of steam turbine; Its pressure generally main vapour pressure 18～22%) from steam turbine, all draw; Deliver to heating (generally being heated to the temperature of the same level of initial steam) once more in the reheater of boiler; And then draw in the back-steam turbine (being generally the admission end of intermediate pressure cylinder), continue the acting of expanding.The employing resuperheat can play and improve the same effect of throttle (steam) temperature, can reduce the humidity of steam discharge again.Thereby possibility is provided for further improving initial steam pressure under the situation that receives the metal material restriction in the raising of throttle (steam) temperature.The steam turbine power plant of modern big capacity high parameter all adopts the resuperheat circulation.But crossing repeatedly resuperheat can make the structural configuration of steam turbine power plant and the method for operation too complicated.
At present, steam power plant or nuclear power plant have brought into use absorption heat pump and condenser through transport device to improve efficiency of thermal cycle, and the principle of this device is that the contrary Carnot cycle with the Rankine cycle of power plant or nuclear power plant's steam and heat pump combines.But; Also there are following shortcoming in existing absorption heat pump and condenser through transport device: the one, and it must rely on cooling tower to support its Lang Ken circulation and be able to proceed; Cause water resource and energy waste (even utilize the heat energy in the recirculated cooling water once more simultaneously; A large amount of heat-energy losses is also arranged in air), operating cost is high; The 2nd, it just partly is coupled together the evaporimeter of condenser and heat pump, and the heat energy that from exhaust steam, obtains occupies few part, and efficiency of thermal cycle is lower, and obtained be used for heating, economic benefit is not good enough.
Summary of the invention
Technical problem to be solved by this invention is, a kind of reduction operating cost is provided, and further improves efficiency of thermal cycle, can reach the method and the device that efficiency of thermal cycle improves in steam power plant or nuclear power plant that be used for of better effects of energy saving and emission reduction.
The technical scheme that the present invention solves its technical problem employing is: a kind of method that is used for steam power plant or nuclear power plant's raising efficiency of thermal cycle; It is characterized in that: will get into from the exhaust steam that steam turbine comes out in the condenser; Carry out exchange heat with the chilled water in the condenser; The chilled water that obtains heat pumps into by the chilled water circulating pump and makes it cooling in the evaporimeter, and the exhaust steam of the cooling that is condensed pumps in the condenser by the water circulating pump that condenses, and in condenser, obtains heat and heat up; Condensate after the intensification flows into the pressurization that heats up in the boiler of steam generator or steam power plant of nuclear power plant by pipeline, realize the Lang Ken circulation; To get into from the high-temperature steam that boiler blow-off or bleeder steam are come out in the generator; Make the cold-producing medium in the interior duplexing matter refrigerant solution of generator be able to take place; The refrigerant vapour that has taken place is by condenser condenses, and heat is discharged to the condensate that is about to get into boiler or steam generator, and condensed cold-producing medium gets into the heat that absorbs the chilled water that is come by the exhaust steam switching in the evaporimeter again and evaporates; And, accomplish the circulation of cold-producing medium by in absorbent recirculation pump and the jet pump introducing generator; The concentrated absorption solution that is produced after taking place is passed through the pipeline inflow absorber, and reenter generator with refrigerant vapour, accomplish the circulation of absorption liquid by absorbent recirculation pump and jet pump.
Further, the heat recipient fluid in the absorber is moved to user's end or cooling device to the heat in the absorber through circulating pump and pipeline.
Further, the water that the heat recipient fluid in the said absorber uses exhaust steam to condense obtains in the absorber in the boiler of the steam generator that flows into nuclear power plant behind the heat or steam power plant.
Implement the device of said method; Comprise condenser, evaporimeter, generator, absorber, condenser; It is characterized in that: said condenser links to each other with evaporimeter through chilled water circulating pump and pipeline, and said evaporimeter links to each other with generator through jet pump and pipeline, and said generator links to each other with absorber through pipeline; Said absorber links to each other with jet pump through absorbent recirculation pump and pipeline; Said condenser links to each other with condenser through condense water circulating pump and pipeline, and an end of a lateral line of said condenser links to each other with evaporimeter through pipeline, and the other end links to each other with generator through pipeline.
Further, the heat recipient fluid side of said absorber links to each other with user's end or cooling device through circulating pump and pipeline.
Further, the heat recipient fluid side of said absorber links to each other with condensate line through circulating pump and pipeline.
The present invention adopts heat pump mode to make that heat energy is able to recycle in the low-temperature heat source, and this is because the heat pump Energy Efficiency Ratio can reach more than 200%, especially under the low-temperature heat source temperature condition with higher, can obtain bigger value.And exhaust steam is a superheated steam, is a highly stable thermal source, though just a little more than the low-grade energy of environment temperature, it has, and latent heat is capable of using greatly, adds its part sensible heat, and contain its inside has the huge energy.
Compared with prior art, the present invention has the following advantages:
(1) evaporimeter of condenser and heat pump is coupled fully; Can realize that the exhaust steam heat is used all sidedly; Wherein most heat shifts the water that condenses and then produced to exhaust steam after shifting to condenser again; Get into the steam generator of nuclear power plant or the boiler of steam power plant again after making it to rise to higher temperature, to reduce the Coal-fired capacity of boiler, the heat of few part provides to the user's end or the cooling device that need heat through absorber interior heat interchanger.
(2) need not to be provided with cooling tower, but conserve water resource and the consumption that reduces electric energy, thus reducing production costs, noiselessness pollutes and thermal pollution.
(3) through introducing jet pump; After the heat of the chilled water that the cold-producing medium absorption is come by the exhaust steam switching is able to evaporation; Be absorbed liquid to absorption heat together and bring generator into, that is to say that jet pump is also conducting heat simultaneously in mass transport process, import in the generator together absorb heat; And these liquid just in time are in critical generation state in generator, only need in the boiler blow-off device or steam turbine is extracted a small amount of high-temperature steam out and just can be taken place.
(4) electric energy that in this process, is consumed is considerably less, even also lack than the electric energy that is consumed in the existing generating thermodynamic cycle process, and as the steam of thermodynamic-driven, is to have done merit waste gas that release or the boiler blow-off process in the steam turbine afterwards.
(5) can effectively solve large-scale condensing-type power plant steam turbine exhaust steam residual heat and efficiently utilize problem, effect is remarkable.
Description of drawings
Fig. 1 is the structural representation of the device that is used for steam power plant or nuclear power plant's raising efficiency of thermal cycle of the embodiment of the invention 1.
The specific embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is described further.
Embodiment 1
The method that is used for steam power plant or nuclear power plant's raising efficiency of thermal cycle of present embodiment; To get into from the exhaust steam that steam turbine comes out in the condenser 1; Carry out exchange heat with the chilled water in the condenser 1; The chilled water that obtains heat pumps into cooling in the evaporimeter 2 by chilled water circulating pump 7, and the exhaust steam of the cooling that is condensed pumps in the condenser 3 by the water circulating pump 6 that condenses, and the heat that acquisition feeds back condenser 3 in and heating up; Condensate after the intensification flows into the pressurization that heats up in the boiler of steam generator or steam power plant of nuclear power plant by pipeline, realize the Lang Ken circulation; To get into from the high-temperature steam that boiler blow-off or bleeder steam are come out in the generator 5; In order to that higher a part of spike section heat of the temperature that helps generation still not enough in the offset generator 5; Make the cold-producing medium in the interior duplexing matter refrigerant solution (lithium bromide water solution) of generator be able to take place; The refrigerant vapour that has taken place is by condenser 3 condensations, and heat is discharged to the condensate that is about to get into boiler or steam generator, and condensed cold-producing medium gets into the heat that absorbs the chilled water that is come by the exhaust steam switching in the evaporimeter 2 and evaporates; And, accomplish the circulation of cold-producing medium by absorbent recirculation pump 8 and jet pump 10 introducing generators 5; The concentrated absorption solution that is produced after taking place is passed through pipeline inflow absorber 4, and reenter generator 5 with refrigerant vapour, accomplish the circulation of absorption liquid by absorbent recirculation pump 8 and jet pump 10.
Heat recipient fluid in the absorber 4 is moved to user's end to the heat in the absorber 4 through circulating pump 9 and pipeline, certainly, also can be cooling device.
With reference to accompanying drawing; The device that is used for steam power plant or nuclear power plant's raising efficiency of thermal cycle of present embodiment; Comprise condenser 1, evaporimeter 2, generator 5, absorber 4, condenser 3; Said condenser 1 links to each other with evaporimeter 2 through chilled water circulating pump 7 and pipeline, and said evaporimeter 2 links to each other with generator 5 through jet pump 10 and pipeline, and said generator 5 links to each other with absorber 4 through pipeline; Said absorber 4 links to each other with jet pump 10 through absorbent recirculation pump 8 and pipeline; Said condenser 3 links to each other with condenser 3 through condense water circulating pump 6 and pipeline, and an end of a lateral line of said condenser 3 links to each other with evaporimeter 2 through pipeline, and the other end links to each other with generator 5 through pipeline.
The heat recipient fluid side of said absorber 4 links to each other with the user is terminal through circulating pump 9 and pipeline, certainly, also can link to each other with cooling device.
Embodiment 2
The method that is used for steam power plant or nuclear power plant's raising efficiency of thermal cycle of present embodiment; Improve the difference of the method for efficiency of thermal cycle and be be used for steam power plant or the nuclear power plant of embodiment 1: the water that the heat recipient fluid in the said absorber uses exhaust steam to condense, obtain in the absorber in the boiler of the steam generator that flows into nuclear power plant behind the heat or steam power plant.
Present embodiment be used for the device that efficiency of thermal cycle improves in steam power plant or nuclear power plant, improve the difference of the device of efficiency of thermal cycle and be be used for steam power plant or the nuclear power plant of embodiment 1: the heat recipient fluid side of said absorber 4 links to each other with condensate line through circulating pump 9 and pipeline.
In sum; The present invention will be against card if circulation and Lang Ken circulation very organically combine; Improve the comprehensive utilization of energy rate to make full use of the absorption cycling hot; Reach very desirable thermodynamic cycle and utilize purpose, can make existing calorific efficiency of heat power station, can be the annual number of practicing thrift of country with hundred million tons coal resources from about 45% levels brought up to more than 65%.
Claims (6)
1. one kind is used for the method that efficiency of thermal cycle improves in steam power plant or nuclear power plant; It is characterized in that: will get into from the exhaust steam that steam turbine comes out in the condenser; Carry out exchange heat with the chilled water in the condenser; The chilled water that obtains heat pumps into by the chilled water circulating pump and makes it cooling in the evaporimeter, and the exhaust steam of the cooling that is condensed pumps in the condenser by the water circulating pump that condenses, and in condenser, obtains heat and heat up; Condensate after the intensification flows into the pressurization that heats up in the boiler of steam generator or steam power plant of nuclear power plant by pipeline, realize the Lang Ken circulation; To get into from the high-temperature steam that boiler blow-off or bleeder steam are come out in the generator; Make the cold-producing medium in the interior duplexing matter refrigerant solution of generator be able to take place; The refrigerant vapour that has taken place is by condenser condenses, and heat is discharged to the condensate that is about to get into boiler or steam generator, and condensed cold-producing medium gets into the heat that absorbs the chilled water that is come by the exhaust steam switching in the evaporimeter again and evaporates; And, accomplish the circulation of cold-producing medium by in absorbent recirculation pump and the jet pump introducing generator; The concentrated absorption solution that is produced after taking place is passed through the pipeline inflow absorber, and reenter generator with refrigerant vapour, accomplish the circulation of absorption liquid by absorbent recirculation pump and jet pump.
2. according to the said method that is used for steam power plant or nuclear power plant's raising efficiency of thermal cycle of claim 1, it is characterized in that: the heat recipient fluid in the absorber is moved to user's end or cooling device to the heat in the absorber through circulating pump and pipeline.
3. according to the said method that is used for steam power plant or nuclear power plant's raising efficiency of thermal cycle of claim 1; It is characterized in that: the water that the heat recipient fluid in the said absorber uses exhaust steam to condense, obtain in the absorber in the boiler of the steam generator that flows into nuclear power plant behind the heat or steam power plant.
4. one kind is used for the device that efficiency of thermal cycle improves in steam power plant or nuclear power plant; Comprise condenser, evaporimeter, generator, absorber, condenser; It is characterized in that: said condenser links to each other with evaporimeter through chilled water circulating pump and pipeline, and said evaporimeter links to each other with generator through jet pump and pipeline, and said generator links to each other with absorber through pipeline; Said absorber links to each other with jet pump through absorbent recirculation pump and pipeline; Said condenser links to each other with condenser through condense water circulating pump and pipeline, and an end of a lateral line of said condenser links to each other with evaporimeter through pipeline, and the other end links to each other with generator through pipeline.
5. the device that is used for steam power plant or nuclear power plant's raising efficiency of thermal cycle according to claim 4, it is characterized in that: the heat recipient fluid side of said absorber links to each other with user's end or cooling device through circulating pump and pipeline.
6. the device that is used for steam power plant or nuclear power plant's raising efficiency of thermal cycle according to claim 4, it is characterized in that: the heat recipient fluid side of said absorber links to each other with condensate line through circulating pump and pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101103951A CN102620478A (en) | 2012-04-16 | 2012-04-16 | Method and device for improving thermal circulation efficiency |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101103951A CN102620478A (en) | 2012-04-16 | 2012-04-16 | Method and device for improving thermal circulation efficiency |
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| CN102620478A true CN102620478A (en) | 2012-08-01 |
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| CN2012101103951A Pending CN102620478A (en) | 2012-04-16 | 2012-04-16 | Method and device for improving thermal circulation efficiency |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102809144A (en) * | 2012-08-06 | 2012-12-05 | 湖南创化低碳环保科技有限公司 | Device and method for using two-stage jet absorption heat pump to improve thermal cycle efficiency |
| CN103615827A (en) * | 2012-11-13 | 2014-03-05 | 摩尔动力(北京)技术股份有限公司 | Injector increment injecting system |
| CN110206602A (en) * | 2019-05-23 | 2019-09-06 | 中国能源建设集团广东省电力设计研究院有限公司 | A kind of heat and power system and its control method based on nuclear power station |
| CN114266171A (en) * | 2021-12-31 | 2022-04-01 | 西安交通大学 | Method for calculating total coupling conjugate heat transfer of U-shaped tube steam generator |
| CN114777104A (en) * | 2022-04-13 | 2022-07-22 | 清华大学 | Superheated steam system and pressurized water reactor |
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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 |
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| CN101793171A (en) * | 2009-12-21 | 2010-08-04 | 江苏双良空调设备股份有限公司 | Combined heat and power system for directly recovering exhaust afterheat of power station steam turbine by absorption heat pump |
| CN202521950U (en) * | 2012-04-16 | 2012-11-07 | 湖南创化低碳环保科技有限公司 | Device for improving efficiency of thermal cycle of thermal power plant or nuclear power plant |
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2012
- 2012-04-16 CN CN2012101103951A patent/CN102620478A/en active Pending
Patent Citations (6)
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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 |
| CN1421645A (en) * | 2001-11-30 | 2003-06-04 | 清华大学 | Absorbing heat pump heating equipment to recover fume afterheat of gas-burning steam-circulating heat and power plant |
| CN2809521Y (en) * | 2005-01-04 | 2006-08-23 | 刘小江 | Jet and absorption combined refrigerator |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102809144A (en) * | 2012-08-06 | 2012-12-05 | 湖南创化低碳环保科技有限公司 | Device and method for using two-stage jet absorption heat pump to improve thermal cycle efficiency |
| CN103615827A (en) * | 2012-11-13 | 2014-03-05 | 摩尔动力(北京)技术股份有限公司 | Injector increment injecting system |
| CN103615827B (en) * | 2012-11-13 | 2016-03-30 | 摩尔动力(北京)技术股份有限公司 | Injection increment ejection system |
| CN110206602A (en) * | 2019-05-23 | 2019-09-06 | 中国能源建设集团广东省电力设计研究院有限公司 | A kind of heat and power system and its control method based on nuclear power station |
| CN114266171A (en) * | 2021-12-31 | 2022-04-01 | 西安交通大学 | Method for calculating total coupling conjugate heat transfer of U-shaped tube steam generator |
| CN114777104A (en) * | 2022-04-13 | 2022-07-22 | 清华大学 | Superheated steam system and pressurized water reactor |
| CN114777104B (en) * | 2022-04-13 | 2024-03-29 | 清华大学 | Superheated steam system and pressurized water reactor |
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Owner name: HUNAN CHUANGHUA LOW-CARBON ENVIRONMENTAL PROTECTIO Free format text: FORMER OWNER: LIU XIAOJIANG Effective date: 20120806 |
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Effective date of registration: 20120806 Address after: Quan Lu and Lu Lu 410013 high-tech zones in Hunan province Changsha Pine Road interchange of agricultural extension business building 14 floor No. 1462 Applicant after: Hunan Chuanghua Low-carbon Environmental Protection Technology Co., Ltd. Address before: Yuelu District City, Hunan province 410023 Changsha view sandy Derun Park run Ambassy court 6 Building 1511 room Applicant before: Liu Xiaojiang |
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