CN104454048A - ORC expansion recycling method and device of waste heat of air compressor set - Google Patents
ORC expansion recycling method and device of waste heat of air compressor set Download PDFInfo
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- CN104454048A CN104454048A CN201410559756.XA CN201410559756A CN104454048A CN 104454048 A CN104454048 A CN 104454048A CN 201410559756 A CN201410559756 A CN 201410559756A CN 104454048 A CN104454048 A CN 104454048A
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Abstract
The invention relates to the recycling and utilizing technology of waste heat of air compressor sets, and provides an ORC expansion recycling method and device of waste heat of an air compressor set. The device comprises a heat exchanger unit connected with a cooler of the air compressor set through a pipeline; the heat exchanger unit is connected with a heat preservation water tank through a pipeline; the heat preservation water tank is connected with an evaporator through a pipeline; the evaporator, a turbo expander, a condenser and a pressure pump are connected in sequence through a pipeline, and an outlet of the pressure pump is connected with the evaporator through a pipeline, so that a circulation loop of organic working media is formed. ORC is adopted to achieve recycling of medium and low temperature waste heat resources, and the problem that waste heat resources of the air compressor set are difficult to recycle and utilize is solved. The use range of ORC expanding is widened, waste heat of the air compressor set can be recycled and utilized on different use occasions according to specific demands, and finally the maximum benefits of energy conservation are achieved.
Description
Technical field
The invention relates to a kind of ORC expansion recovery and utilization technology of air-compressor set waste heat.More particularly, a kind of waste heat ORC expansion recovery and utilization technology being specifically designed to air-compressor set is related to.
Background technique
Pressurized air is one of universal energy being only second to electric power, is the fourth-largest energy be most widely used in process industry.Due to features such as safety, cleanings, easily control, compressed air system is widely used in all conglomeraties such as automobile, tire, weaving, semiconductor, chemical industry, electric power, iron and steel, food, its power consumption Zhan Zheng factory energy consumption 10 ~ 40% between.
In pressurized air preparation process, there is the electric power of 70% ~ 90% to be converted into heat, but seldom carry out the comprehensive reutilization of air compressor unit waste heat at present, cause the overall efficiency of air compression system on the low side.Therefore, the waste heat that air-compressor set produces is recycled effectively, to energy-saving and emission-reduction, there is positive realistic meaning.
At present, residual heat of air compressor recovery technology is day by day ripe, and the application in enterprise is also carried out gradually, but the situation that ubiquity cannot utilize completely or not utilize summer, particularly in south, except some processes heat, most waste heat is still directly drained, and affects the utilization rate of waste heat of complete machine.
Given this, the heat recovery of air-compressor set is got up for the acting of ORC decompressor, effectively and fully can utilize the waste heat of air-compressor set like this, improve the UTILIZATION OF VESIDUAL HEAT IN level of whole factory air-compressor set.
Summary of the invention
The technical problem to be solved in the present invention is, overcomes deficiency of the prior art, provides a kind of ORC expansion recovering device and method of air-compressor set waste heat.For solving its technical problem, the technological scheme that the present invention takes is:
There is provided a kind of ORC expansion recovering device of air-compressor set waste heat, comprise the heat-exchange unit of the heat recovery for producing in air-compressor set compression process for generation of hot water, heat-exchange unit is connected with air-compressor set cooler by pipeline; This heat-exchange unit also connects heat-insulating water tanks by pipeline, and heat-insulating water tanks is connected with vaporizer by pipeline simultaneously; Vaporizer, turbo-expander, condenser, compression pump are connected successively by pipeline, and compression pump outlet is connected to vaporizer by pipeline, thus forms the circulation loop of organic working medium.
Invention further provides the method utilizing aforementioned means to realize air-compressor set waste heat ORC expansion recovery, comprise the following steps:
(1) heat recovery that utilizes the heat-exchange unit that is connected with air-compressor set cooler will to produce in air-compressor set compression process, is stored in heat-insulating water tanks for generation of the hot water of more than 90 DEG C;
(2) hot water that produces sends into vaporizer, and the organic working medium in vaporizer is heated into saturated or overheated steam, and steam enters expansion work after turbo-expander by pipeline; It is after the liquid under condensing pressure that exhaust after expansion enters cooled medium condenses in condenser, the liquid under utilizing compression pump to be pressurized to evaporating pressure, again flows into vaporizer and is entered turbo-expander acting after hot water heating, completes an ORC circulation;
(3) during turbo-expander expansion work, complete in following actions any one: drive electrical generators generates electricity; Or drag pump or fan (or dragging the rotating machinery of other types); Or drag another air compressor standard unit, the pressurized air newly produced is pressed into pipe network again; Or drag another compressor, one stage of compression is carried out to the fresh air after filtering, then utilizes zero power consumption pressure-increasing machine to be pressed into pipe network again by after pressurized air supercharging.
In the present invention, described organic working medium is pentafluoropropane.
Compared with prior art, the invention has the beneficial effects as follows:
1. adopt organic Rankine bottoming cycle to achieve the recovery of middle-low temperature heat resource, solve air-compressor set residual heat resources and recycle difficult problem.
2. widened the using scope of ORC expansion work, can according to real needs by air-compressor set residual heat recovery in different use occasions, finally realize the maximization of energy-saving benefit.
Accompanying drawing explanation
Fig. 1 is that air-compressor set heat recovery produces hot water schematic diagram;
Fig. 2 is ORC system flow chart;
Fig. 3 is that decompressor acting utilizes schematic diagram.
Embodiment
The principle that realizes of the present invention is:
First, reclaimed the heat that produces in air-compressor set compression process by heat-exchange unit for generation of the hot water of more than 90 DEG C, and be stored in heat-insulating water tanks.Secondly, hot water flows into vaporizer from heat-insulating water tanks by pipeline, in vaporizer, organic working medium is heated into saturated or superheated vapor, and steam enters expander acting, and decompressor drive electrical generators generates electricity.Exhaust after expansion enters in condenser by pipeline, cooled medium condenses is the liquid under condensing pressure, the liquid condition under evaporating pressure is pressurized to again by working medium compression pump, enter vaporizer by hot water heating, enter decompressor acting again, complete a circulation, the recovery thus the ORC achieving air-compressor set waste heat expands.Decompressor, except drive electrical generators generating, directly can drag the rotating machinery of Pumps & Fans or other types; Also can directly drag other air-compressor set, then the pressurized air produced is pressed into pipe network again; Also can drag compressor, one stage of compression be carried out to the fresh air after filtering, then increases by zero power consumption pressure-increasing machine, finally the pressurized air after supercharging is pressed into pipe network again.
Following embodiment can make the technician of this professional skill field more fully understand the present invention, but does not limit the present invention in any way.With reference to figures 1 through 3, will describe the present invention below.
Fig. 1 is that air-compressor set heat recovery produces hot water schematic diagram, and heat-exchange unit utilizes thermal power transfer principle, and the heat recovery that air compressor distributes is transformed in water, after water absorbs heat, water temperature will raise, and can reach more than 90 DEG C, flows into heat-insulating water tanks and be stored up by pipeline.
Fig. 2 represents ORC system flow chart in the present invention, and wherein key step is as follows:
1) in heat-insulating water tanks, the hot water of more than 90 DEG C is flowed in vaporizer by pipeline, the organic working medium of storing in vaporizer is heated into saturated or superheated vapor (non-water vapor);
2) steam enters expander acting, and decompressor drive electrical generators generates electricity;
3) exhaust after expanding enters in condenser, (usual cooling medium is cooling water or cooling-air to cooled medium, for the area of water resources compared with horn of plenty, the mode of water-cooled can be adopted, otherwise, air cooling mode can be adopted to cool) be condensed into liquid under condensing pressure, the liquid condition under evaporating pressure is pressurized to again by working medium compression pump, enter vaporizer by hot water heating, enter decompressor acting again, complete a circulation, the recovery thus the ORC achieving air-compressor set waste heat expands.
Fig. 3 represents that decompressor acting utilizes schematic diagram, and decompressor, except drive electrical generators generating, directly can drag the rotating machinery of Pumps & Fans or other types; Also can directly drag other air-compressor set, then the pressurized air produced is pressed into pipe network again; Also can drag compressor, one stage of compression be carried out to the fresh air after filtering, then increases by zero power consumption pressure-increasing machine, finally the pressurized air after supercharging is pressed into pipe network again.
Therefore, actual range of the present invention not only comprises the disclosed embodiments, be also included under claims implement or perform all equivalents of the present invention.
Claims (3)
1. the ORC expansion recovering device of air-compressor set waste heat, comprise the heat-exchange unit of the heat recovery for producing in air-compressor set compression process for generation of hot water, heat-exchange unit is connected with air-compressor set cooler by pipeline; It is characterized in that, this heat-exchange unit also connects heat-insulating water tanks by pipeline, and heat-insulating water tanks is connected with vaporizer by pipeline simultaneously; Vaporizer, turbo-expander, condenser, compression pump are connected successively by pipeline, and compression pump outlet is connected to vaporizer by pipeline, thus forms the circulation loop of organic working medium.
2. utilize device described in claim 1 to realize the method for air-compressor set waste heat ORC expansion recovery, it is characterized in that, comprise the following steps:
(1) heat recovery that utilizes the heat-exchange unit that is connected with air-compressor set cooler will to produce in air-compressor set compression process, is stored in heat-insulating water tanks for generation of the hot water of more than 90 DEG C;
(2) hot water that produces sends into vaporizer, and the organic working medium in vaporizer is heated into saturated or overheated steam, and steam enters expansion work after turbo-expander by pipeline; It is after the liquid under condensing pressure that exhaust after expansion enters cooled medium condenses in condenser, the liquid under utilizing compression pump to be pressurized to evaporating pressure, again flows into vaporizer and is entered turbo-expander acting after hot water heating, completes an ORC circulation;
(3) during turbo-expander expansion work, complete in following actions any one:
Drive electrical generators generates electricity; Or
Drag pump or fan; Or
Drag another air compressor standard unit, the pressurized air newly produced is pressed into pipe network again; Or
Drag another compressor, one stage of compression is carried out to the fresh air after filtering, then utilizes zero power consumption pressure-increasing machine to be pressed into pipe network again by after pressurized air supercharging.
3. method according to claim 2, is characterized in that, described organic working medium is pentafluoropropane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410559756.XA CN104454048A (en) | 2014-10-18 | 2014-10-18 | ORC expansion recycling method and device of waste heat of air compressor set |
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| CN201410559756.XA CN104454048A (en) | 2014-10-18 | 2014-10-18 | ORC expansion recycling method and device of waste heat of air compressor set |
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Cited By (5)
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| CN104794966A (en) * | 2015-04-22 | 2015-07-22 | 上海理工大学 | Organic Rankine cycle system experimental device |
| CN105201841A (en) * | 2015-09-30 | 2015-12-30 | 杭州哲达科技股份有限公司 | Apparatus and method of preparing compressed air by ORC (organic Rankine cycle) |
| CN106438278A (en) * | 2016-12-02 | 2017-02-22 | 开封中化换热设备有限公司 | Gas compressing system |
| CN109667635A (en) * | 2019-01-29 | 2019-04-23 | 江苏金通灵流体机械科技股份有限公司 | The a variety of waste heats recycling organic rankine cycle system and application method of pneumoelectric alliance |
| CN111677653A (en) * | 2020-06-01 | 2020-09-18 | 浙江大学 | Air separation system for recycling waste heat of compressed air, pre-dehumidifying and pre-cooling |
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| CN202597021U (en) * | 2012-05-09 | 2012-12-12 | 福建中源合纵节能科技有限公司 | Air compressor waste heat recovery device |
| KR101298543B1 (en) * | 2006-09-15 | 2013-08-22 | 재단법인 포항산업과학연구원 | Apparatus and Method for Treating Waste Gas |
| WO2013151029A1 (en) * | 2012-04-05 | 2013-10-10 | 川崎重工業株式会社 | Gas turbine engine system that uses organic medium |
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| CN101027468A (en) * | 2002-11-13 | 2007-08-29 | 开利公司 | Combined rankine and vapor compression cycles |
| KR101298543B1 (en) * | 2006-09-15 | 2013-08-22 | 재단법인 포항산업과학연구원 | Apparatus and Method for Treating Waste Gas |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104794966A (en) * | 2015-04-22 | 2015-07-22 | 上海理工大学 | Organic Rankine cycle system experimental device |
| CN105201841A (en) * | 2015-09-30 | 2015-12-30 | 杭州哲达科技股份有限公司 | Apparatus and method of preparing compressed air by ORC (organic Rankine cycle) |
| CN106438278A (en) * | 2016-12-02 | 2017-02-22 | 开封中化换热设备有限公司 | Gas compressing system |
| CN109667635A (en) * | 2019-01-29 | 2019-04-23 | 江苏金通灵流体机械科技股份有限公司 | The a variety of waste heats recycling organic rankine cycle system and application method of pneumoelectric alliance |
| CN111677653A (en) * | 2020-06-01 | 2020-09-18 | 浙江大学 | Air separation system for recycling waste heat of compressed air, pre-dehumidifying and pre-cooling |
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Application publication date: 20150325 |