CN102230401B - 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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- CN102230401B CN102230401B CN201110129510.5A CN201110129510A CN102230401B CN 102230401 B CN102230401 B CN 102230401B CN 201110129510 A CN201110129510 A CN 201110129510A CN 102230401 B CN102230401 B CN 102230401B
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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 heat energy utilization and energetics, particularly a kind of system of organic Rankine cycle low-temperature power generation working medium and method of replacing thereof.
Background technique
The primary energy such as coal, oil, rock gas are just day by day exhausted, and the mankind, when seeking new energy, are also optimized and improve current using energy source structure.The process of industrialization of China is accelerated in recent years, and the residual heat resources that produce in the production process of the industrial products such as chemical industry, building materials are increased, if these waste heats are directly discharged in environment, goes, and can cause energy waste and environmental thermal pollution.In addition, occurring in nature also exists the renewable low-temperature heat sources such as abundant solar energy, geothermal power.Therefore, the aim that the residual heat resources in 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, because working medium used is water, can not mate with low-temperature heat source temperature, is difficult to realize effective utilization of low-temperature heat source.Organic rankie cycle is a kind of new type power circulation, and it is the working medium as Rankine cycle by organic working medium, has significant advantage aspect low temperature heat.Yet organic working medium is expensive, high volatility, a part has faint toxicity, and atmospheric ozone layer is had to certain destruction, and its physicochemical properties also can change during organic working medium long-time running, produce harmful gas.So how properly preserving, use safely, regularly replace organic working medium is a key technology difficult problem for restriction organic Rankine circulation engineering application.
The working medium of using in tradition thermal power generation is water; be a kind of environmental friendliness and material with low cost, due to vapour, the water leakage loss of system, can be system after softening water by water replenishing device in recycle unit; when equipment downtime overhauls, can be by the water in system directly discharged to environment.And organic Rankine circulation, because its working medium adopting is expensive, easily volatilization, the working medium having in addition also has certain toxicity, harmful to human body and environment, therefore, does not allow to exist and leak when unit normally moves, therefore do not need to supplement working medium.But, when shutting down maintenance, the organic working medium in must reclaiming system, when starting by the medium storing without leaking ground input system and by the Bas Discharged in system, otherwise airborne oxygen is the parts of etching system, and cause system normally not circulate; The leakage of working medium will increase user cost greatly.Therefore, a set of new working substance supply system of exploitation is badly in need of in the use of organic Rankine circulation.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of system of organic Rankine cycle low-temperature power generation working medium and method of 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 low-temperature generating system shutdown process; while reaching shutdown, reclaim working medium; during startup by working medium without leaking ground input system and discharging the effect of air, realize the normal operation of organic Rankine circulation.
System of organic Rankine cycle low-temperature power generation working medium of the present invention, comprise vacuum pump, suction booster, working medium holding vessel, and liquid container, described vacuum delivery side of pump is connected to the input end of suction booster by the 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 working medium holding vessel by the 3rd valve, the other end of described working medium holding vessel is connected on liquid container by the second valve, and liquid container is also connected with the condenser of vacuum pump and the circulatory system respectively simultaneously.
As the preferred embodiments of the present invention, on described liquid container, be provided with liquid level display;
As the preferred embodiments of the present invention, on described vacuum pump, be connected with vacuum gauge;
The method of replacing of above-mentioned system of organic Rankine cycle low-temperature power generation working medium, when 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 reaching predetermined vacuum level requirement, close the first valve, stoppage in transit vacuum pump, open the second valve, organic working medium flows into liquid container by working medium holding vessel, and the working medium total amount in liquid container meets after circulation requires closes the second valve, completes working medium to the injection of the circulatory system; When low-temperature generating system shutdown need to be reclaimed working medium; first close the 4th valve; open the 3rd valve; by suction booster, the working medium in liquid container is recycled in working medium holding vessel; after the whole pumpings out of working medium in liquid container; close the 3rd valve, the suction booster of then stopping transport, realizes the recovery encapsulation of working medium.
System of organic Rankine cycle low-temperature power generation working medium of the present invention and method of replacing thereof at least have the following advantages: when 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 liquid container; when low-temperature generating system shutdown need to be reclaimed working medium; relend and help suction booster that the working medium in working medium liquid container is recycled in working medium holding vessel, realize the recovery of working medium.Like this; the present invention when low-temperature generating system starts by organic working medium safety non-leakage be injected into the circulatory system in and discharge air, when low-temperature generating system is shut down, realize the recovery of working medium; guarantee staff's handling safety, eliminated the impact of working medium on environment.
Accompanying drawing explanation
Fig. 1 is the overall structure block diagram of system of the present invention.
Embodiment
System of organic Rankine cycle low-temperature power generation working medium 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 to the input end of suction booster 7 by the 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 working medium holding vessel 4 by the 3rd valve 103, the other end of described working medium holding vessel 4 is connected on liquid container 5 by the second valve 102, and liquid container 5 is also connected with the condenser 3 of vacuum pump 8 and the circulatory system respectively simultaneously.
Further, on described liquid container 5, be provided with liquid level display 6, on described vacuum pump 8, be connected with vacuum gauge 105 to show degree of vacuum.
When 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, until after vacuum gauge 105 readings reach pre-provisioning request, close the first valve 101, stoppage in transit vacuum pump 8, now circulatory system pipeline and device interior are all in vacuum state, open the second valve 102, by pressure reduction, working medium is injected to liquid container 5 by working medium holding vessel 4, according to the liquid level display 6 of installing on liquid container 5, just can know the working medium amount of injected system, working medium total amount in liquid container 5 meets after circulation requires closes the second valve 102, complete working medium to the injection of the circulatory system.Due to the air-extraction function of vacuum pump 8, the air in the circulatory system is drawn out of, and avoids the oxide etch of equipment.
When low-temperature generating system shutdown need to be reclaimed working medium, first close the 4th valve 104, open the 3rd valve 103, now, by suction booster 7, the working medium in liquid container 5 is recycled in working medium holding vessel 4, realize effective recovery of working medium in the circulatory system.After the whole pumpings out of working medium in low-temperature generating system, close the 3rd valve 103, the suction booster 7 of then stopping transport, realizes the recovery encapsulation of working medium.
The present invention, by vacuum pumping system, the keying of pipeline valve, the coordination of the start and stop of suction booster and working medium holding vessel, realizes the Safety Injection of organic working medium and reclaims and preserve, and when starting the air in discharge system.System of organic Rankine cycle low-temperature power generation working medium of the present invention has been realized organic working medium safety non-leakage and has injected the circulatory system and discharged the air of system when unit starting, reclaims working medium when compressor emergency shutdown comprehensively.System is simple, easy to operate, and sealability is good, can meet the requirement of organic working medium to system in ORC (organic Rankine cycle) low-temperature generating, has also guaranteed staff's handling safety, eliminates the impact of medium on 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 as required bypass, pipeline and valve realize specific function.Therefore, this system can be widely used in derived energy chemical field, has important engineering practical value.
The foregoing is only one embodiment of the present invention, it 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. a system of organic Rankine cycle low-temperature power generation working medium, 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 to the input end of suction booster (7) by the 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 working medium holding vessel (4) by the 3rd valve (103), the other end of described working medium holding vessel (4) is connected on liquid container (5) by the second valve (102), liquid container (5) is also connected with the condenser (3) of vacuum pump (8) and the circulatory system respectively simultaneously.
2. a kind of system of organic Rankine cycle low-temperature power generation working medium as claimed in claim 1, is characterized in that: on described liquid container (5), be provided with liquid level display (6).
3. system of organic Rankine cycle low-temperature power generation working medium as claimed in claim 1 or 2, is characterized in that: on described vacuum pump (8), be connected with vacuum gauge (105).
4. the method for replacing of a system of organic Rankine cycle low-temperature power generation working medium claimed in claim 1, 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 reaching predetermined vacuum level requirement, close the first valve (101), stop vacuum pump (8), open the second valve (102), working medium is injected liquid container (5) by pressure reduction by working medium holding vessel (4), working medium total amount in liquid container (5) meets closes the second valve (102) after low-temperature generating system requires, complete working medium to the injection of the circulatory system, when low-temperature generating system shutdown need to be reclaimed working medium, first close the 4th valve (104), open the 3rd valve (103), by suction booster (7), the working medium in liquid container (5) is recycled in working medium holding vessel (4), after the whole pumpings out of working medium in low-temperature generating system, close the 3rd valve (103), the suction booster (7) of then stopping transport, realizes the recovery encapsulation of working medium.
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Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
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| FR2985767B1 (en) * | 2012-01-18 | 2019-03-15 | IFP Energies Nouvelles | DEVICE FOR CONTROLLING A WORKING FLUID IN A CLOSED CIRCUIT OPERATING ACCORDING TO A RANKINE CYCLE AND METHOD USING SUCH A DEVICE |
| CN102758751A (en) * | 2012-06-05 | 2012-10-31 | 张世民 | Temperature difference generating system |
| CN103306759B (en) * | 2013-06-17 | 2015-04-08 | 合肥通用机械研究院 | Organic Rankine cycle generating set easy to reclaim organic working medium |
| JP6044529B2 (en) * | 2013-12-05 | 2016-12-14 | トヨタ自動車株式会社 | Waste heat recovery device |
| 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 |
| KR101508278B1 (en) | 2014-01-03 | 2015-04-08 | 한국에너지기술연구원 | Method And Apparatus For Injection And Recovering Working Fluid Of Organic Rankine Cycle |
| FR3020090B1 (en) * | 2014-04-16 | 2019-04-12 | IFP Energies Nouvelles | DEVICE FOR CONTROLLING A CLOSED CIRCUIT OPERATING ACCORDING TO A RANKINE CYCLE AND METHOD USING SUCH A DEVICE |
| CN104075328B (en) * | 2014-06-27 | 2017-02-15 | 上海泰欣环境工程股份有限公司 | Waste incineration low-temperature generator |
| CN106401676B (en) * | 2016-11-10 | 2018-07-13 | 贵州康德农业科技有限公司 | A kind of cryogenic liquid vaporizer electricity-generating method and generating equipment |
| CN108826770B (en) * | 2018-08-16 | 2023-07-21 | 广东工业大学 | Efficient and intelligent organic working medium recycling system |
| 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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