CN102230401A - Replacement system of organic Rankine cycle low-temperature power generation working medium and replacement method thereof - Google Patents
Replacement system of organic Rankine cycle low-temperature power generation working medium and replacement method thereof Download PDFInfo
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- CN102230401A CN102230401A CN2011101295105A CN201110129510A CN102230401A CN 102230401 A CN102230401 A CN 102230401A CN 2011101295105 A CN2011101295105 A CN 2011101295105A CN 201110129510 A CN201110129510 A CN 201110129510A CN 102230401 A CN102230401 A CN 102230401A
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Abstract
The invention provides a replacement system of an organic Rankine cycle low-temperature power generation working medium and a replacement method thereof. The replacement system of an organic Rankine cycle low-temperature power generation working medium comprises a vacuum pump, a booster pump, a working medium hold-up vessel and a fluid reservoir, wherein the output end of the vacuum pump is connected to the input end of the booster pump by a first valve; the output end of the booster pump is connected to the steam generator of a circulating system by a fourth valve; the booster pump is connected to the working medium hold-up vessel by a third valve; the other end of the working medium hold-up vessel is connected to the fluid reservoir by a second valve; and meanwhile, the fluid reservoir is also respectively connected with the vacuum pump and the condenser of the circulating system. When working medium needs to be injected into the low-temperature power generation system of the organic working medium, air is extracted from the circulating system by the vacuum pump to cause the system to generate vacuum degree; the working medium is injected into the fluid reservoir by differential pressure to inject the working medium; and when the low-temperature power generation system halts and needs to recover the working medium, and the working medium in the fluid reservoir is injected back to the working medium hold-up vessel by the booster pump, thereby recovering the working medium.
Description
Technical field
The invention belongs to low temperature heat energy utilization and energetics, particularly a kind of ORC (organic Rankine cycle) low-temperature generating working medium replacing system and method for replacing thereof.
Background technique
Primary energy such as coal, oil, rock gas are exhausted just day by day, and are human when seeking new energy, also current using energy source structure are optimized and improve.The process of industrialization of China is accelerated in recent years, makes the residual heat resources that produce in the production process of industrial products such as chemical industry, building materials increase, and goes in the environment if these waste heats directly are discharged into, and can cause energy waste and environmental thermal pollution.In addition, occurring in nature also exists renewable low-temperature heat sources such as abundant solar energy, geothermal power.Therefore, the aim that the residual heat resources in the recycling industrial production and the renewable low-temperature heat source of occurring in nature had both met China's energy-saving and emission-reduction also can realize energy structure optimizing.
The form of low temperature heat energy is varied, and adopts low-temperature electricity-generating to remain current main flow.Traditional generation technology can not mate with low-temperature heat source temperature because used working medium is water, is difficult to realize effective utilization of low-temperature heat source.The organic working medium Rankine cycle is the circulation of a kind of new type power, and its is with the working medium of organic working medium as Rankine cycle, has significant advantage at low temperature exhaust heat aspect utilizing.Yet organic working medium costs an arm and a leg, high volatility, and a part has faint toxicity, and atmospheric ozone layer is had certain destruction, and its physicochemical properties also can change during the organic working medium long-time running, produce harmful gas.So how properly preserving, use safely, regularly replace organic working medium is a restriction organic Rankine circulation engineering key technologies for application difficult problem.
The working medium of using in the tradition thermal power generation is water; being a kind of environmental friendliness and material with low cost, owing to vapour, the water leakage loss of system, can be system's after softening water by water replenishing device in recycle unit; when equipment downtime overhauls, the water in the system directly can be arranged to environment.And the organic Rankine circulation because the working medium that it adopted costs an arm and a leg, is volatilized easily, and the working medium that has in addition also has certain toxicity, and is harmful to human body and environment, therefore, do not allow when unit normally moves to exist and leaks, so do not need to replenish working medium.But, when shutting down maintenance, the organic working medium in must reclaiming system does not have a media stored ground of leakage input system and the air in the system is discharged when starting, otherwise airborne oxygen is the parts of etching system, and causes system normally not circulate; The leakage of working medium will increase user cost greatly.Therefore, the organic Rankine circuit uses the new working substance supply system of exploitation one cover of being badly in need of.
Summary of the invention
Technical problem to be solved by this invention provides a kind of ORC (organic Rankine cycle) low-temperature generating working medium replacing system and method for replacing thereof; adopt vacuum suction device, bypath system, valving, working medium holding vessel, liquid container and suction booster to realize the displacement of organic working medium in the low-temperature generating system shutdown process; reach and reclaim working medium when shutting down; during startup working medium is not had the effect of leaking ground input system and exhausting air, realize that the organic Rankine circuit normally moves.
ORC (organic Rankine cycle) low-temperature generating working medium replacing system of the present invention, comprise vacuum pump, suction booster, working medium holding vessel, and liquid container, described vacuum delivery side of pump is connected the input end of suction booster by first valve, described supercharging delivery side of pump is connected on the steam generator of the circulatory system by the 4th valve, described suction booster is connected on the working medium holding vessel by the 3rd valve, the other end of described working medium holding vessel is connected on the liquid container by second valve, and liquid container also links to each other with the condenser of the vacuum pump and the circulatory system respectively simultaneously.
As the preferred embodiments of the present invention, described liquid container is provided with liquid level display;
As the preferred embodiments of the present invention, be connected with vacuum gauge on the described vacuum pump;
The method of replacing of above-mentioned ORC (organic Rankine cycle) low-temperature generating working medium replacing system, when the low-temperature generating system startup needs working medium to inject, open the first and the 4th valve, close the second and the 3rd valve, start vacuum pump exhaust from the circulatory system, after waiting to reach the predetermined vacuum level requirement, close first valve, the stoppage in transit vacuum pump, open second valve, organic working medium flows into liquid container by the working medium holding vessel, closes second valve when the working medium total amount in the liquid container satisfies after circulation requires, and finishes the injection of working medium to the circulatory system; When the low-temperature generating system shutdown need be reclaimed working medium; at first close the 4th valve; open the 3rd valve; by suction booster the working medium in the liquid container is recycled in the working medium holding vessel; after the whole pumpings of the working medium in the liquid container are come out; close the 3rd valve, the suction booster of stopping transport is then realized the recovery encapsulation of working medium.
ORC (organic Rankine cycle) low-temperature generating working medium replacing system of the present invention and method of replacing thereof have the following advantages at least: when the low-temperature generating system startup needs working medium to inject; the present invention utilizes vacuum pump and suction booster exhaust from the circulatory system; working medium is stored in the liquid container; when the low-temperature generating system shutdown need be reclaimed working medium; relend and help suction booster that the working medium in the working medium liquid container is recycled in the working medium holding vessel, realize the recovery of working medium.Like this; the present invention is injected in the circulatory system and exhausting air organic working medium safety when low-temperature generating system starts with not having leakage, when low-temperature generating system is shut down, realizes the recovery of working medium; guaranteed staff's handling safety, eliminated the influence of working medium environment.
Description of drawings
Fig. 1 is the overall structure block diagram of system of the present invention.
Embodiment
ORC (organic Rankine cycle) low-temperature generating working medium replacing system of the present invention comprises vacuum pump 8, suction booster 7, working medium holding vessel 4, and liquid container 5.
The output terminal of described vacuum pump 8 is connected the input end of suction booster 7 by first valve 101, the output terminal of described suction booster 7 is connected on the steam generator 1 of the circulatory system by the 4th valve 104, described suction booster 7 is connected on the working medium holding vessel 4 by the 3rd valve 103, the other end of described working medium holding vessel 4 is connected on the liquid container 5 by second valve 102, and liquid container 5 also links to each other with the condenser 3 of the vacuum pump 8 and the circulatory system respectively simultaneously.
Further, described liquid container 5 is provided with liquid level display 6, is connected with vacuum gauge 105 on the described vacuum pump 8 to show degree of vacuum.
When the low-temperature generating system startup needs working medium to inject, open the first and the 4th valve 101,104, close the second and the 3rd valve 102,103, start vacuum pump 8 exhaust from the circulatory system, by the time vacuum gauge 105 readings reach after the pre-provisioning request, close first valve 101, stoppage in transit vacuum pump 8, this moment, circulatory system pipeline and device interior all were in vacuum state, open second valve 102, by pressure reduction working medium is injected liquid container 5 by working medium holding vessel 4, just can know the working medium amount of injected system according to the liquid level display of installing on the liquid container 56, close second valve 102 when the working medium total amount in the liquid container 5 satisfies after circulation requires, finish the injection of working medium to the circulatory system.Because the effect of bleeding of vacuum pump 8, the air in the circulatory system is drawn out of, and avoids the oxide etch of equipment.
When the low-temperature generating system shutdown need be reclaimed working medium, at first close the 4th valve 104, open the 3rd valve 103, at this moment, the working medium in the liquid container 5 is recycled in the working medium holding vessel 4 by suction booster 7, realize effective recovery of working medium in the circulatory system.After the whole pumpings of the working medium in the low-temperature generating system are come out, close the 3rd valve 103, the suction booster 7 of stopping transport is then realized the recovery encapsulation of working medium.
The present invention is by vacuum pumping system, the keying of pipeline valve, the start and stop of suction booster and the coordination of working medium holding vessel, and the safety that realizes organic working medium is injected and reclaimed and preserve, and when starting the air in the discharge system.ORC (organic Rankine cycle) low-temperature generating working medium replacing system of the present invention has been realized when unit starting that organic working medium safety has and has been leaked the air that ground injects the circulatory system and discharge system, reclaimed working medium comprehensively when compressor emergency shutdown.System is simple, easy to operate, and sealability is good, can satisfy that organic working medium has also guaranteed staff's handling safety to the requirement of system in the ORC (organic Rankine cycle) low-temperature generating, eliminates the influence of medium to environment.
The present invention is not limited to the application of ORC (organic Rankine cycle) low-temperature generating.The liquid medium that any needs are properly preserved, use safely, regularly replaced can adopt this system, or on the basis of this system, add bypass as required, pipeline and valve realize specific function.Therefore, this system can be widely used in the derived energy chemical field, has the important engineering use value.
The above only is one embodiment of the present invention, it or not whole or unique mode of execution, the conversion of any equivalence that those of ordinary skills take technical solution of the present invention by reading specification of the present invention is claim of the present invention and contains.
Claims (4)
1. ORC (organic Rankine cycle) low-temperature generating working medium replacing system, it is characterized in that: comprise vacuum pump (8), suction booster (7), working medium holding vessel (4), and liquid container (5), the output terminal of described vacuum pump (8) is connected the input end of suction booster (7) by first valve (101), the output terminal of described suction booster (7) is connected on the steam generator (1) of the circulatory system by the 4th valve (104), described suction booster (7) is connected on the working medium holding vessel (4) by the 3rd valve (103), the other end of described working medium holding vessel (4) is connected on the liquid container (5) by second valve (102), and liquid container (5) also links to each other with the condenser (3) of the vacuum pump (8) and the circulatory system respectively simultaneously.
2. ORC (organic Rankine cycle) low-temperature generating working medium replacing system, it is characterized in that: described liquid container (5) is provided with liquid level display (6).
3. ORC (organic Rankine cycle) low-temperature generating working medium replacing system as claimed in claim 1 or 2 is characterized in that: be connected with vacuum gauge (105) on the described vacuum pump (8).
4. the method for replacing of the described ORC (organic Rankine cycle) low-temperature generating working medium of claim 1 replacing system, it is characterized in that: when organic working medium low-temperature generating system needs working medium to inject, open the first and the 4th valve (101,104), close the second and the 3rd valve (102,103), start vacuum pump (8) exhaust from the circulatory system, after waiting to reach the predetermined vacuum level requirement, close first valve (101), stop vacuum pump (8), open second valve (102), working medium is injected liquid container (5) by pressure reduction by working medium holding vessel (4), close second valve (102) after low-temperature generating system requires when the working medium total amount in the liquid container (5) satisfies, finish the injection of working medium to the circulatory system; When the low-temperature generating system shutdown need be reclaimed working medium; at first close the 4th valve (104); open the 3rd valve (103); by suction booster (7) working medium in the liquid container (5) is recycled in the working medium holding vessel (4); after the whole pumpings of the working medium in the low-temperature generating system are come out; close the 3rd valve (103), the suction booster (7) of stopping transport is then realized the recovery encapsulation of working medium.
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Cited By (11)
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| CN102758751A (en) * | 2012-06-05 | 2012-10-31 | 张世民 | Temperature difference generating system |
| CN103306759A (en) * | 2013-06-17 | 2013-09-18 | 合肥通用机械研究院 | Organic Rankine cycle generating set easy to reclaim organic working medium |
| CN103738909A (en) * | 2013-12-30 | 2014-04-23 | 武汉长海高新技术有限公司 | Working substance filling and recycling device and method for organic Rankine cycle waste heat generator set |
| CN104075328A (en) * | 2014-06-27 | 2014-10-01 | 上海泰欣环保工程有限公司 | Waste incineration low-temperature generator |
| US20150013338A1 (en) * | 2012-01-18 | 2015-01-15 | IFP Energies Nouvelles | Device for controlling a working fluid in a closed circuit operating according to the rankine cycle, and method using said device |
| KR101508278B1 (en) | 2014-01-03 | 2015-04-08 | 한국에너지기술연구원 | Method And Apparatus For Injection And Recovering Working Fluid Of Organic Rankine Cycle |
| US20150300210A1 (en) * | 2014-04-16 | 2015-10-22 | IFP Energies Nouvelles | Device for controlling a closed loop working on a rankine cycle and method using same |
| CN105980667A (en) * | 2013-12-05 | 2016-09-28 | 丰田自动车株式会社 | Waste heat recovery apparatus |
| CN106401676A (en) * | 2016-11-10 | 2017-02-15 | 贵州康德农业科技有限公司 | Cryogenic liquid evaporation power generation method and device |
| CN108826770A (en) * | 2018-08-16 | 2018-11-16 | 广东工业大学 | A kind of organic working medium recovery system of high efficiency smart |
| CN115126690A (en) * | 2022-08-02 | 2022-09-30 | 山东国舜建设集团有限公司 | Organic working medium filling and recycling assembly, waste heat recycling generator set and method |
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| CN105980667A (en) * | 2013-12-05 | 2016-09-28 | 丰田自动车株式会社 | Waste heat recovery apparatus |
| CN105980667B (en) * | 2013-12-05 | 2017-07-28 | 丰田自动车株式会社 | Exhaust heat recovery apparatus |
| CN103738909B (en) * | 2013-12-30 | 2017-01-04 | 武汉长海高新技术有限公司 | Organic Rankine bottoming cycle cogeneration unit working medium fill and retracting device and fill and recovery method |
| CN103738909A (en) * | 2013-12-30 | 2014-04-23 | 武汉长海高新技术有限公司 | Working substance filling and recycling device and method for organic Rankine cycle waste heat generator set |
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| KR101508278B1 (en) | 2014-01-03 | 2015-04-08 | 한국에너지기술연구원 | Method And Apparatus For Injection And Recovering Working Fluid Of Organic Rankine Cycle |
| US20150300210A1 (en) * | 2014-04-16 | 2015-10-22 | IFP Energies Nouvelles | Device for controlling a closed loop working on a rankine cycle and method using same |
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| CN104075328A (en) * | 2014-06-27 | 2014-10-01 | 上海泰欣环保工程有限公司 | Waste incineration low-temperature generator |
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| CN108826770A (en) * | 2018-08-16 | 2018-11-16 | 广东工业大学 | A kind of organic working medium recovery system of high efficiency smart |
| CN108826770B (en) * | 2018-08-16 | 2023-07-21 | 广东工业大学 | Efficient and intelligent organic working medium recycling system |
| CN115126690A (en) * | 2022-08-02 | 2022-09-30 | 山东国舜建设集团有限公司 | Organic working medium filling and recycling assembly, waste heat recycling generator set and method |
| CN115126690B (en) * | 2022-08-02 | 2023-10-31 | 山东国舜建设集团有限公司 | Organic working medium filling and recycling assembly, waste heat recycling generator set and method |
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