CN103670556B - A kind of double-work medium cycle waste heat generating system - Google Patents
A kind of double-work medium cycle waste heat generating system Download PDFInfo
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- CN103670556B CN103670556B CN201310626226.8A CN201310626226A CN103670556B CN 103670556 B CN103670556 B CN 103670556B CN 201310626226 A CN201310626226 A CN 201310626226A CN 103670556 B CN103670556 B CN 103670556B
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Abstract
The invention discloses a kind of double-work medium cycle waste heat generating system, comprise the steam turbine driving generator, and the low boiling working fluid turbine that be connected coaxial with steam turbine; The steam driven that steam turbine is produced by exhaust heat boiler, after steam Transportation to the turbine expansion of exhaust heat boiler generation does work, steam discharge flows through working medium vaporizer successively by pipeline and working medium heater carries out heat exchange, and heat release condenses into liquid, returns exhaust heat boiler be heated to form steam through water pump; Low boiling working fluid turbine is driven by Working medium gas, and worker quality liquid flows through working medium heater and working medium vaporizer successively, and heat absorption flashes to Working medium gas, enters the acting of low boiling working fluid turbine expansion, and the Working medium gas exhaust after acting is by regenerator heat release.The thermal source of the exhausted spare heat produced in steam cycle process as low boiling working fluid cyclic process, by reasonably designing double-work medium circulation, by repeatedly heat exchange process, can utilize, can increase substantially utilization rate of waste heat by the present invention fully.
Description
Technical field
The invention belongs to waste heat and be beneficial to technical field, relate to a kind of double-work medium cycle waste heat generating system.
Background technique
In industrial processes, in order to effectively utilize the waste heat of flue gas or other sources of the gas with energy saving, conventional UTILIZATION OF VESIDUAL HEAT IN is that steam enters turbine expansion acting and promotes vane rotary by single exhaust heat boiler heating water generates steam, thus drive electrical generators generating.Conventional vapor recycle only has the thermal energy of about 30% to be electric energy, and wherein the heat of 70% is taken away by the recirculated cooling water of vapour condenser in steam condensation, and utilization rate of waste heat is not high.
Summary of the invention
The problem that the present invention solves is to provide a kind of double-work medium cycle waste heat generating system, comprises water circulation and low boiling working fluid and to circulate the circulation of two kinds of working medium, can increase substantially utilization rate of waste heat.
The present invention is achieved through the following technical solutions:
A kind of double-work medium cycle waste heat generating system, comprises the steam turbine driving generator, and the low boiling working fluid turbine that be connected coaxial with steam turbine;
The steam driven that steam turbine is produced by exhaust heat boiler, after steam Transportation to the turbine expansion of exhaust heat boiler generation does work, steam discharge flows through working medium vaporizer successively by pipeline and working medium heater carries out heat exchange, and heat release condenses into liquid, returns exhaust heat boiler be heated to form steam through water pump;
Low boiling working fluid turbine is driven by Working medium gas, worker quality liquid flows through working medium heater and working medium vaporizer successively, heat absorption flashes to Working medium gas, enter the acting of low boiling working fluid turbine expansion, Working medium gas exhaust after acting is by regenerator heat release, enter condenser and be condensed into worker quality liquid, absorbed heat by regenerator again after working medium pump pressurization, get back to working medium heater.
The generator that described steam turbine, low boiling working fluid turbine drive jointly replaces with pump or fan.
Described exhaust heat boiler is the exhaust heat boiler with afterburning system, comprise economizer, water tank, vaporizer, afterburning burner and the first drum, the water (flow) direction passed through is contrary by direction with waste heat flue gas, after the steam water interface of vaporizer generation enters the first drum, steam enters steam turbine acting, and water gets back to water tank through recycle pump.
Described water tank also separates hot water and heats worker quality liquid working medium vaporizer through piping, and the water that working medium vaporizer is discharged enters working medium heater preheating worker quality liquid, and the water that working medium heater is discharged gets back to water tank through water pump, economizer again.
Described water tank is connected with working medium vaporizer by pipeline, and pipeline is provided with adjustment doors to control the flow entering hot water in working medium vaporizer.
Described exhaust heat boiler is when heating, and waste heat gas is mixed into exhaust heat boiler mutually with the high-temperature flue gas from afterburning burner, flows through vaporizer successively and economizer carries out heat release, discharge after its temperature reduces.
The water circulation of the steam of described driving steam turbine is:
Water enters water tank after water pump after economizer is preheated, water section in water tank enters vaporizer generation steam water interface and enters the first drum, after carbonated drink is separated, water gets back to water tank through recycle pump, steam enters turbine expansion acting, steam discharge enters working medium vaporizer and carries out heat exchange, water is become after the heat release of heating working medium liquid, simultaneously after adjustment doors, enter working medium vaporizer from the part water of water tank also to heat worker quality liquid, the water that working medium vaporizer is discharged enters working medium heater preheating worker quality liquid, the water that working medium heater is discharged gets back to economizer through water pump again,
The working medium circulation of driving low boiling working fluid turbine is:
Worker quality liquid pressurizes through working medium pump, absorbed heat by regenerator, after entering the preheating of working medium heater again, enter working medium vaporizer to become gaseous state and enter the second drum, Working medium gas from the second drum enters the acting of low boiling working fluid turbine expansion, turbine exhaust, by regenerator heat release, enters vapour condenser and is condensed into worker quality liquid, enter into regenerator by working medium pump.
Described when turbine exhaust enters regenerator, carry out heat exchange by regenerator, be heated by the worker quality liquid that working medium pump enters.
Described worker quality liquid is low boiling working fluid, and under normal pressure, its boiling point is-27.07 DEG C ~ 14.9 DEG C.
Compared with prior art, the present invention has following useful technique effect:
Double-work medium cycle waste heat generating system provided by the invention, the double-work medium of steam and low boiling working fluid is adopted to carry out power generation system, by reasonably designing double-work medium circulation, by repeatedly heat exchange process, fully the thermal source of the exhausted spare heat produced in steam cycle process as low boiling working fluid cyclic process can be utilized, can utilization rate of waste heat be increased substantially.
Double-work medium cycle waste heat generating system provided by the invention, the cyclic design of its two kinds of working medium is ingenious, can realize repeatedly heat exchange:
Described water cycle process is: after water is pressurized in water pump, the economizer entering exhaust heat boiler is heated by flue gas or other source of the gas, then water tank is entered, the water of part water tank enters in vaporizer and is entered drum by after high-temperature flue gas or the heating of other source of the gas, part water becomes steam and enters expansion work in steam turbine, drives electrical power generators or other equipment to rotate.The water not becoming steam gets back to water tank under the effect of recycle pump.Turbine discharge enters working medium vaporizer and part and heats low boiling working fluid from the water of water tank, steam heat release becomes liquid water, water is preheating low boiling working fluid in working medium heater, the temperature of water continues to reduce, then flow through water pump, enter exhaust heat boiler, by low-temperature flue gas or other source of the gas preheating in economizer, then enter water tank and vaporizer, thus define water circulation.
Because the turbine discharge in water cycle process still has certain heat, therefore steam discharge is introduced in the low boiling working fluid circulatory system and carry out secondary heat exchange utilization, improve efficiency of energy utilization.Turbine discharge by working medium vaporizer and working medium heater, condenses into liquid state after heat release successively, gets back to again in exhaust heat boiler continue circulation through water pump pressurization; And the hot water in water tank heats cycle fluid simultaneously, ensure that the gasification of cycle fluid.
Described low boiling working fluid cyclic process is: low boiling working fluid is after working medium pump adherence pressure, enter working medium heater by water preheat, then enter working medium vaporizer continuation heating and enter drum, low boiling working fluid gas from drum out after, enter the acting of low boiling working fluid turbine expansion, drive electrical power generators or other equipment to rotate.Exhaust after acting, by regenerator heat release, becomes liquid after entering condenser, is absorbed heat after working medium pump pressurization by regenerator again, enters working medium heater and continues circulation, forms low boiling working fluid circulation.
Described regenerator can improve thermal efficiency of cycle: low boiling working fluid turbine exhaust carries out heat exchange by regenerator, temperature is reduced, reduce in vapour condenser the heat being recycled cooling water and taking away, worker quality liquid after condensation pressurization is simultaneously absorbed heat by regenerator again, improve the temperature of worker quality liquid, reduce the caloric receptivity of worker quality liquid in vaporizer, improve thermal efficiency of cycle and heat-economy.
Double-work medium cycle waste heat generating system provided by the invention, can fully utilize waste heat: from the waste heat of the flue gas in industrial process or other source of the gas before entering exhaust heat boiler body, mix mutually with from the high-temperature flue gas of afterburning burner or other source of the gas, mixed flue gas or other other enter boiler body after, flow through vaporizer successively and economizer carries out heat release, its temperature reduces, and is finally discharged.
Accompanying drawing explanation
Fig. 1 is double-work medium cycle waste heat generating system schematic diagram of the present invention.
Wherein, 1. water pump, 2. economizer, 3. water tank, 4. vaporizer, 5. the first drum, 6. recycle pump, 7. steam turbine, 8. generator, 9. adjustment doors, 10. working medium vaporizer, 11. working medium heaters, 12. working medium pumps, 13. second drums, 14. low boiling working fluid turbines, 15. vapour condenser, 16. regenerators.
Embodiment
Below in conjunction with specific embodiment, the present invention is described in further detail, and the explanation of the invention is not limited.
See Fig. 1, double-work medium cycle waste heat generating system provided by the invention, comprises the steam turbine 7 driving generator 8, and the low boiling working fluid turbine 14 that be connected coaxial with steam turbine 7;
The steam driven that steam turbine 7 is produced by exhaust heat boiler, exhaust heat boiler produce steam Transportation to steam turbine 7 expansion work, steam discharge flows through working medium vaporizer 10 successively by pipeline and working medium heater 11 carries out heat exchange, heat release condenses into liquid, returns exhaust heat boiler be heated to form steam through water pump 1;
Low boiling working fluid turbine 14 is driven by Working medium gas, worker quality liquid flows through working medium heater 11 and working medium vaporizer 10 successively, heat absorption flashes to Working medium gas, enter low boiling working fluid turbine 14 expansion work, Working medium gas exhaust after acting is by regenerator 16 heat release, enter condenser 15 and be condensed into worker quality liquid, absorbed heat by regenerator 16 again after working medium pump 12 pressurizes, get back to working medium heater 11.
Described double-work medium is water and low boiling working fluid, described low boiling working fluid comprise: R245fa atmospheric boiling point is 14.9 DEG C, and R134a atmospheric boiling point is-27.07 DEG C.And the generator 8 that described steam turbine 7, low boiling working fluid turbine 14 drive jointly can replace with other loads, such as pump or fan.
Concrete, water enters water tank 3 after water pump 1 after economizer 2 is by low-temperature flue gas or other air preheat, then part water enters vaporizer 4 and produces steam water interface and enter the first drum 5, water gets back to water tank 3 through recycle pump 6, steam enters steam turbine 7 expansion work drive electrical generators 8 and generates electricity, steam discharge enters after working medium vaporizer 10 heats low boiling working fluid and becomes water, simultaneously after adjustment doors 9, enter working medium vaporizer 10 from the part water of water tank 3 also to heat low boiling working fluid, the water that working medium vaporizer 10 is discharged enters working medium heater 11 preheating low boiling working fluid, then pressurize through water pump 1, form complete water circulation.
Working medium gas from drum 13 enters low boiling working fluid turbine 14 expansion work drive electrical generators 8 and generates electricity, turbine exhaust is by regenerator 16 heat release, enter vapour condenser 15 and be condensed into liquid state, pressurize through working medium pump 12, absorbed heat by regenerator 16 again, after entering working medium heater 11 preheating, enter working medium vaporizer 10 and become gaseous state and enter the second drum 13, form complete low boiling working fluid circulation.
In water cycle process, after water is pressurized in water pump, the economizer entering exhaust heat boiler is heated by flue gas or other source of the gas, then water tank is entered, the water of part water tank enters in vaporizer and is entered drum by after high-temperature flue gas or the heating of other source of the gas, part water becomes steam and enters expansion work in steam turbine, drives electrical power generators or other equipment to rotate.The water not becoming steam gets back to water tank under the effect of recycle pump.Turbine discharge enters working medium vaporizer and part and heats low boiling working fluid from the water of water tank, steam heat release becomes liquid water, water is preheating low boiling working fluid in working medium heater, the temperature of water continues to reduce, then flow through water pump, enter exhaust heat boiler, by low-temperature flue gas or other source of the gas preheating in economizer, then enter water tank and vaporizer, thus define water circulation.
Because the turbine discharge in water cycle process still has certain heat, therefore steam discharge is introduced in the low boiling working fluid circulatory system and carry out secondary heat exchange utilization, improve efficiency of energy utilization.Turbine discharge by working medium vaporizer and working medium heater, condenses into liquid state after heat release successively, gets back to again in exhaust heat boiler continue circulation through water pump pressurization.
In low boiling working fluid cyclic process, low boiling working fluid is after working medium pump adherence pressure, enter working medium heater by water preheat, then enter working medium vaporizer continuation heating and enter drum, low boiling working fluid gas from drum out after, enter the acting of low boiling working fluid turbine expansion, drive electrical power generators or other equipment to rotate.Exhaust after acting, by regenerator heat release, becomes liquid after entering condenser, is absorbed heat after working medium pump pressurization by regenerator again, enters working medium heater and continues circulation, forms low boiling working fluid circulation.
Described regenerator Main Function: low boiling working fluid turbine exhaust carries out heat exchange by regenerator, temperature is reduced, reduce in vapour condenser the heat being recycled cooling water and taking away, worker quality liquid after condensation pressurization is simultaneously absorbed heat by regenerator again, improve the temperature of worker quality liquid, reduce the caloric receptivity of worker quality liquid in vaporizer, improve thermal efficiency of cycle and heat-economy.
Claims (6)
1. a double-work medium cycle waste heat generating system, is characterized in that, comprises the steam turbine (7) driving generator (8), and the low boiling working fluid turbine (14) that be connected coaxial with steam turbine (7);
The steam driven that steam turbine (7) is produced by exhaust heat boiler, exhaust heat boiler produce steam Transportation to steam turbine (7) expansion work, steam discharge flows through working medium vaporizer (10) successively by the first pipeline and working medium heater (11) carries out heat exchange, heat release condenses into liquid, returns exhaust heat boiler be heated to form steam through water pump (1);
Low boiling working fluid turbine (14) is driven by Working medium gas, worker quality liquid flows through working medium heater (11) and working medium vaporizer (10) successively, heat absorption flashes to Working medium gas, enter low boiling working fluid turbine (14) expansion work, Working medium gas exhaust after acting is by regenerator (16) heat release, enter vapour condenser (15) and be condensed into worker quality liquid, again by regenerator (16) heat absorption after working medium pump (12) pressurization, get back to working medium heater (11);
Described exhaust heat boiler is the exhaust heat boiler with afterburning system, comprise economizer (2), water tank (3), vaporizer (4), afterburning burner and the first drum (5), the water (flow) direction passed through is contrary by direction with waste heat flue gas, after the steam water interface produced through vaporizer (4) enters the first drum (5), steam enters steam turbine (7) acting, and water gets back to water tank (3) through recycle pump (6);
Described water tank (3) also separates hot water and heats worker quality liquid working medium vaporizer (10) through second pipe, the water that working medium vaporizer (10) is discharged enters working medium heater (11) preheating worker quality liquid, and the water that working medium heater (11) is discharged gets back to water tank (3) through water pump (1), economizer (2) again;
Described exhaust heat boiler is when heating, and waste heat gas is mixed into exhaust heat boiler mutually with the high-temperature flue gas from afterburning burner, flows through vaporizer (4) successively and economizer (2) carries out heat release, discharge after the reduction of its temperature.
2. double-work medium cycle waste heat generating system as claimed in claim 1, is characterized in that, the generator (8) that described steam turbine (7), low boiling working fluid turbine (14) drive jointly replaces with pump or fan.
3. double-work medium cycle waste heat generating system as claimed in claim 1, it is characterized in that, described water tank (3) is connected with working medium vaporizer (10) by second pipe, and second pipe is provided with the flow that adjustment doors (9) controls to enter hot water in working medium vaporizer (10).
4., as the double-work medium cycle waste heat generating system of claim 1-3 as described in any one, it is characterized in that, the water circulation of the steam of driving steam turbine (7) is:
Water enters water tank (3) after water pump (1) after economizer (2) is preheated, water section in water tank (3) enters vaporizer (4) generation steam water interface and enters the first drum (5), after carbonated drink is separated, water gets back to water tank (3) through recycle pump (6), steam enters steam turbine (7) expansion work, steam discharge enters working medium vaporizer (10) and carries out heat exchange, water is become after the heat release of heating working medium liquid, simultaneously after adjustment doors (9), enter working medium vaporizer (10) from the part water of water tank (3) also to heat worker quality liquid, the water that working medium vaporizer (10) is discharged enters working medium heater (11) preheating worker quality liquid, the water that working medium heater (11) is discharged gets back to economizer (2) through water pump (1) again,
The working medium circulation of driving low boiling working fluid turbine (14) is:
Worker quality liquid pressurizes through working medium pump (12), absorbed heat by regenerator (16), after entering working medium heater (11) preheating again, enter working medium vaporizer (10) to become gaseous state and enter the second drum (13), Working medium gas from the second drum (13) enters low boiling working fluid turbine (14) expansion work, turbine exhaust is by regenerator (16) heat release, enter vapour condenser (15) and be condensed into worker quality liquid, enter into regenerator (16) by working medium pump (12).
5. double-work medium cycle waste heat generating system as claimed in claim 4, it is characterized in that, when turbine exhaust enters regenerator (16), carry out heat exchange by regenerator (16), be heated by the worker quality liquid that working medium pump (12) enters.
6. double-work medium cycle waste heat generating system as claimed in claim 4, it is characterized in that, described worker quality liquid is low boiling working fluid, and under normal pressure, its boiling point is-27.07 DEG C ~ 14.9 DEG C.
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| CN110469375A (en) * | 2019-08-16 | 2019-11-19 | 中信重工机械股份有限公司 | A kind of double discard heat generating systems of carbonated drink |
| CN110486989B (en) * | 2019-08-27 | 2021-02-02 | 安徽省智慧产业研究院股份有限公司 | Biomass gasification stove combined cooling and power generation system |
| WO2022156521A1 (en) * | 2021-01-19 | 2022-07-28 | 李华玉 | Dual-fuel combined cycle power plant |
| WO2022161113A1 (en) * | 2021-01-27 | 2022-08-04 | 李华玉 | Dual-fuel combined cycle power device |
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| US6018942A (en) * | 1996-11-04 | 2000-02-01 | Asea Brown Boveri Ag | Combined cycle power station with gas turbine cooling air cooler |
| CN203271829U (en) * | 2013-05-24 | 2013-11-06 | 成都昊特新能源技术股份有限公司 | Double-power ORC power generation system |
| CN203296838U (en) * | 2013-06-20 | 2013-11-20 | 华效资源有限公司 | Heating furnace flue gas and steam waste heat recovery and power generation system |
| CN203584488U (en) * | 2013-11-27 | 2014-05-07 | 陕西擎华新能源技术有限公司 | Double-working-medium circulation afterheat power generation system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US7290393B2 (en) * | 2004-05-06 | 2007-11-06 | Utc Power Corporation | Method for synchronizing an induction generator of an ORC plant to a grid |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6018942A (en) * | 1996-11-04 | 2000-02-01 | Asea Brown Boveri Ag | Combined cycle power station with gas turbine cooling air cooler |
| CN203271829U (en) * | 2013-05-24 | 2013-11-06 | 成都昊特新能源技术股份有限公司 | Double-power ORC power generation system |
| CN203296838U (en) * | 2013-06-20 | 2013-11-20 | 华效资源有限公司 | Heating furnace flue gas and steam waste heat recovery and power generation system |
| CN203584488U (en) * | 2013-11-27 | 2014-05-07 | 陕西擎华新能源技术有限公司 | Double-working-medium circulation afterheat power generation system |
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