CN104296544B - A kind of low-temperature cogeneration flash system - Google Patents
A kind of low-temperature cogeneration flash system Download PDFInfo
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- CN104296544B CN104296544B CN201410534918.4A CN201410534918A CN104296544B CN 104296544 B CN104296544 B CN 104296544B CN 201410534918 A CN201410534918 A CN 201410534918A CN 104296544 B CN104296544 B CN 104296544B
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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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- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
- Y02P80/15—On-site combined power, heat or cool generation or distribution, e.g. combined heat and power [CHP] supply
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Abstract
nullA kind of low-temperature cogeneration flash system，The present invention adopts water vapour phase-change heat transfer mode to add hot liquid organic working medium，Flash distillation mode is adopted to produce saturated organic steam，Wherein steam is condensed into water at heater (3) shell-side，Oxygen-eliminating device (2) is sent into again by condensate pump，Heat absorption evaporation is continued as boiler feedwater after deoxygenation，Organic working medium heats in the heater and enters back into flash tank shwoot to certain high temperature and go out saturated vapor，Saturated vapor is after gas-liquid separation，Steam is used for driving organic working medium turbine drive electrical generators to produce electric energy，Organic working medium turbine exhaust steam converges the preheater sending into waste heat boiler back-end ductwork after organic working medium pump pressurizes again after condenser condenses with the liquid refrigerant in flash tank (5)，Organic working medium heater is entered back into after preheating，The present invention has simple to operate、Relative inexpensiveness、Control simple、The feature that safety is high.
Description
[technical field]
The present invention relates to a kind of generating flash system, be specifically related to a kind of low-temperature cogeneration flash system.
[background technology]
Known, lime rotary kiln technique is big because having yield, activity of lime is high, the thermal efficiency is high, the feature that exhaust temperature is low, therefore widely adopt in iron and steel enterprise, wherein lime rotary kiln shaft preheater outlet exhaust temperature is typically in 200～250 DEG C, belong to low-temperature flue gas waste heat, at present, discharged at lower temperature type lime rotary kiln cogeneration technology substantially belongs to blank at home, only in the lime production line that situation is comparatively special, there is application, such as iron and steel 2 × 600t/d limekiln, Xinyu, Jiangxi exhaust gas temperature is up to 380 DEG C, Jiangsu steel 2 × 600t/d limekiln exhaust gas temperature forever is up to 450 DEG C, and auxiliary construction Waste Heat Power Station power benefit is good, but it is not representative, therefore lime rotary kiln cogeneration technology still suffers from following shortcoming at present:
1, water vapour rankine cycle inefficiency, it is impossible to high efficiente callback fume afterheat；
2, then there is working medium filling quantity according to either simplex matter organic media rankine cycle big, the problems such as corresponding vapo(u)rization system difficult design, working medium reclaim, storage is difficult；
3, adopt the two fluid system of conduction oil and organic working medium both at home and abroad traditionally, but conduction oil is expensive；
4, conduction oil is complicated macromolecule mixture, and work chemical reactions such as a long time under the high temperature conditions can producing polymerization cracking, reduces oil quality, and in heat exchange tube wall dross, can cause the accidents such as high temperature booster；
5, conduction oil has certain military service cycle, needs periodic replacement, causes operating cost higher；
6, reclaim, for low temperature exhaust heat, the kalina technology that also can adopt, but the design of this system is complicated, it is big to implement difficulty, ammonia is revealed and is easily caused the shortcomings such as poisoning, explosion accident.
[summary of the invention]
For overcoming the deficiency existed in background technology, the invention provides a kind of low-temperature cogeneration flash system, the present invention enters back into flash tank shwoot to certain high temperature go out saturated vapor by organic working medium being heated in the heater, saturated vapor is after gas-liquid separation, steam is used for driving organic working medium turbine drive electrical generators to produce electric energy, the feature that the present invention has simple to operate, relative inexpensiveness, control is simple, safety is high.
For realizing goal of the invention as above, the present invention adopts technical scheme as described below:
nullA kind of low-temperature cogeneration flash system，Including oxygen-eliminating device、Heater、Condensate pump、Flash tank、Organic working medium turbine、Electromotor、Condenser、Evaporative type cooler、Working medium pump、Feed pump、Preheater、Economizer、Drum、Boiler body vaporizer and boiler body superheater，The outlet of described economizer connects the water inlet of drum by pipeline，The outlet of described drum connects the water inlet of boiler body vaporizer by pipeline，The steam (vapor) outlet of described boiler body vaporizer connects the steam inlet of drum by pipeline，The steam (vapor) outlet of drum connects the steam inlet of boiler body superheater by pipeline，The steam (vapor) outlet of boiler body superheater connects heater by pipeline，The water out that condenses of described heater connects the water inlet of condensate pump by pipeline，The outlet of described condensate pump connects the water inlet of oxygen-eliminating device by pipeline，The outlet of described oxygen-eliminating device connects the water inlet of feed pump by pipeline，The outlet of described feed pump connects the water inlet of economizer by pipeline，The R123 outlet of described heater connects flash tank by pipeline，Described flash tank connects organic working medium turbine by pipeline，Described organic working medium turbine connects electromotor，The exhaust steam connector of organic working medium turbine connects condenser，Described condenser connects evaporative type cooler and working medium pump respectively，Described working medium pump connects the import of preheater by pipeline，The outlet of described preheater connects the R123 import of heater by pipeline，Described flash tank connects working medium pump by pipeline and forms described low-temperature cogeneration flash system.
Described low-temperature cogeneration flash system, the version of described heater is similar to steam turbine bleeder heater structure, and inside can be divided into superheat section, condense section, hydrophobic section.
Described low-temperature cogeneration flash system, described preheater is arranged on the lower section of waste heat boiler.
Described low-temperature cogeneration flash system, described working medium pump is diaphragm type or screw.
Adopting technical scheme as above, the present invention has superiority as described below:
nullA kind of low-temperature cogeneration flash system of the present invention，The present invention adopts water vapour phase-change heat transfer mode to add hot liquid organic working medium，Flash distillation mode is adopted to produce saturated organic steam，Wherein steam is condensed into water at heater shell-side，Oxygen-eliminating device is sent into again by condensate pump，Heat absorption evaporation is continued as boiler feedwater after deoxygenation，Organic working medium heats in the heater and enters back into flash tank shwoot to certain high temperature and go out saturated vapor，Saturated vapor is after gas-liquid separation，Steam is used for driving organic working medium turbine drive electrical generators to produce electric energy，Organic working medium turbine exhaust steam converges the preheater sending into waste heat boiler back-end ductwork after organic working medium pump pressurizes again after condenser condenses with the liquid refrigerant in flash tank，Organic working medium heater is entered back into after preheating，The present invention has simple to operate、Relative inexpensiveness、Control simple、The feature that safety is high.
[accompanying drawing explanation]
Fig. 1 is the flow sheet of the present invention；
In the drawings: 1, waste heat boiler；2, oxygen-eliminating device；3, heater；4, condensate pump；5, flash tank；6, organic working medium turbine；7, electromotor；8, condenser；9, evaporative type cooler；10, working medium pump；11, feed pump；12, preheater；13, economizer；14, drum；15, boiler body vaporizer；16, boiler body superheater.
[detailed description of the invention]
The present invention can be explained in more detail by the following examples, the invention is not limited in the following examples；
In conjunction with accompanying drawing 1 a kind of low-temperature cogeneration flash system of the present invention, including oxygen-eliminating device 2, heater 3, condensate pump 4, flash tank 5, organic working medium turbine 6, electromotor 7, condenser 8, evaporative type cooler 9, working medium pump 10, feed pump 11, preheater 12, economizer 13, drum 14, boiler body vaporizer 15 and boiler body superheater 16, described preheater 12 be arranged over waste heat boiler 1, preheater 12 is arranged on the back-end ductwork of waste heat boiler 1, can recycle lime rotary kiln waste gas residual heat by step；nullThe outlet of described economizer 13 connects the water inlet of drum 14 by pipeline，The outlet of described drum 14 connects the water inlet of boiler body vaporizer 15 by pipeline，The steam (vapor) outlet of described boiler body vaporizer 15 connects the steam inlet of drum 14 by pipeline，The steam (vapor) outlet of drum 14 connects the steam inlet of boiler body superheater 16 by pipeline，The steam (vapor) outlet of boiler body superheater 16 connects heater 3 by pipeline，The water out that condenses of described heater 3 shell-side connects the water inlet of condensate pump 4 by pipeline，The outlet of described condensate pump 4 connects the water inlet of oxygen-eliminating device 2 by pipeline，The outlet of described oxygen-eliminating device 2 connects the water inlet of feed pump 11 by pipeline，The outlet of described feed pump 11 connects the import of economizer 13 by pipeline，The R123 outlet of described heater 3 connects flash tank 5 by pipeline，Described flash tank 5 connects organic working medium turbine 6 by pipeline，Described organic working medium turbine 6 connects electromotor 7，The exhaust steam connector of organic working medium turbine 6 connects condenser 8，Described condenser 8 connects evaporative type cooler 9 and working medium pump 10 respectively，Described working medium pump 10 is diaphragm type or screw，To meet the high-head of ORC system、Good seal performance、The high requirement of flow control accuracy；Working medium pump 10 connects the import of preheater 12 by pipeline, and the outlet of described preheater 12 connects the R123 import of heater 3 by pipeline, and described flash tank 5 connects working medium pump 10 by pipeline and enters the low-temperature cogeneration flash system described in interruption-forming.
The present invention is with feed pump 11 for starting point, water is introduced into economizer 13, drum 14 is out entered afterwards from economizer 13, again from drum 14 out, enter boiler body vaporizer 15, now water is flashed to the steam of saturated mode by boiler body vaporizer 15, saturated vapor again returns to carry out in drum 14 gas-liquid separation, enter, further out drum 14, the steam that boiler body superheater 16 became hot after gas-liquid separation, cross hot steam and enter heater 3 from boiler body superheater 16 outlet, in the present invention, drum 14 is arrange to meet certain circulating ratio in the boiler circuit of boiler body, its effect mainly steam-water separation.
Present invention waste heat boiler 1 when implementing produces low-pressure superheated steam and enters the R123 of heater 3 shell-side heating tube side, organic working medium is warming up to certain high temperature, enter flash tank 5 and flash off some vapor, organic working medium steam is used for driving organic working medium turbine 6 drive electrical generators 7 to produce electric energy, organic working medium turbine 6 exhaust steam converges with the liquid refrigerant in flash tank 5 after condenser 8 condenses again, working medium pump 10 pressurize and send into preheater 12；Preheater 12 is arranged on the back-end ductwork of waste heat boiler 1.Condensation water in liquid refrigerant bottom flash tank 5 and condenser 8 is pressurizeed feeding preheater 12 by working medium pump 10 after converging.Oxygen-eliminating device 2 adopts chemistry dosing deoxygenation.Condensate pump 4 will condense water and send into oxygen-eliminating device 2, be sent into boiler heat absorption evaporation by feed pump 11 after deoxygenation；Wherein heater 3 is internal adopts thermal power steam turbine bleeder heater version, is superheat section according to shell fluid state demarcation, condenses section, hydrophobic section.
The organic working medium boiling point used in the present invention is low, at identical temperature higher than water saturation pressure, therefore organic working medium can be heated when liquid to high temperature, flash off high steam again and drive organic working medium turbine 6, adopt waste heat boiler 1 to reclaim lime rotary kiln waste gas residual heat and produce low parameter superheated steam, adopt steam heating organic working medium, install organic working medium preheater 12 additional at waste heat boiler 1 back-end ductwork, it is achieved the step of residual heat resources is recycled；Heater 3 adopts the version of thermal power steam turbine bleeder heater, according to shell fluid state, heat exchanging segment is divided into superheated steam section, steam condensation section, hydrophobic section.
The superheated steam that in the present invention, waste heat boiler 1 produces enters organic working medium heater 3, and steam is condensed into water at heater 3 shell-side, then is sent into oxygen-eliminating device 2 by condensate pump, continues heat absorption evaporation as boiler feedwater after deoxygenation.Organic working medium heats in heater 3 and enters back into flash tank 5 shwoot go out saturated vapor to certain high temperature, saturated vapor is after gas-liquid separation, steam is used for driving organic working medium turbine 6 drive electrical generators 7 to produce electric energy, organic working medium turbine 6 exhaust steam converges the preheater 12 sending into waste heat boiler 1 back-end ductwork after organic working medium pump 10 pressurizes again after condenser 8 condenses with the liquid refrigerant in flash tank 5, enters back into organic working medium heater 3 tube side after preheating.
Part not in the detailed description of the invention is prior art.
The embodiment selected in this article for the open purpose of the present invention, it is suitable to be presently considered to be, however, it should be understood that, it is contemplated that include all changes belonging to embodiment in this design and invention scope and improvement.
Claims (4)
- null1. a low-temperature cogeneration flash system，Including oxygen-eliminating device (2)、Heater (3)、Condensate pump (4)、Flash tank (5)、Organic working medium turbine (6)、Electromotor (7)、Condenser (8)、Evaporative type cooler (9)、Working medium pump (10)、Feed pump (11)、Preheater (12)、Economizer (13)、Drum (14)、Boiler body vaporizer (15) and boiler body superheater (16)，It is characterized in that: the outlet of described economizer (13) connects the water inlet of drum (14) by pipeline，The outlet of described drum (14) connects the water inlet of boiler body vaporizer (15) by pipeline，The steam (vapor) outlet of described boiler body vaporizer (15) connects the steam inlet of drum (14) by pipeline，The steam (vapor) outlet of drum (14) connects the steam inlet of boiler body superheater (16) by pipeline，The steam (vapor) outlet of boiler body superheater (16) connects heater (3) by pipeline，The condensation water out of described heater (3) connects the water inlet of condensate pump (4) by pipeline，The outlet of described condensate pump (4) connects the water inlet of oxygen-eliminating device (2) by pipeline，The outlet of described oxygen-eliminating device (2) connects the water inlet of feed pump (11) by pipeline，The outlet of described feed pump (11) connects the water inlet of economizer (13) by pipeline，The R123 outlet of described heater (3) connects flash tank (5) by pipeline，Described flash tank (5) connects organic working medium turbine (6) by pipeline，Described organic working medium turbine (6) connects electromotor (7)，The exhaust steam connector of organic working medium turbine (6) connects condenser (8)，Described condenser (8) connects evaporative type cooler (9) and working medium pump (10) respectively，Described working medium pump (10) connects the import of preheater (12) by pipeline，The outlet of described preheater (12) connects the R123 import of heater (3) by pipeline，Described flash tank (5) connects working medium pump (10) by pipeline and forms described low-temperature cogeneration flash system.
- 2. low-temperature cogeneration flash system according to claim 1, is characterized in that: described heater (3) is internal adopts thermal power steam turbine bleeder heater version, is superheat section according to shell fluid state demarcation, condenses section, hydrophobic section.
- 3. low-temperature cogeneration flash system according to claim 1, is characterized in that: described preheater (12) is arranged on the lower section of Economizer of Heat Recovery Boiler (13).
- 4. low-temperature cogeneration flash system according to claim 1, is characterized in that: described working medium pump (10) is diaphragm type or screw.
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| CN201410534918.4A CN104296544B (en) | 2014-10-13 | 2014-10-13 | A kind of low-temperature cogeneration flash system |
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| CN104296544B true CN104296544B (en) | 2016-07-06 |
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| CN108167027B (en) * | 2017-12-27 | 2020-02-07 | 山西晋城无烟煤矿业集团有限责任公司 | Negative pressure flash steam power generation method in pressurized gasification chilling process |
| CN110220388A (en) * | 2019-03-27 | 2019-09-10 | 北京中冶设备研究设计总院有限公司 | A kind of converter gas waste heat recovery device and method |
| CN113074028B (en) * | 2021-04-22 | 2023-05-12 | 中创清洁能源发展（沈阳）股份有限公司 | Flue gas low-temperature waste heat power generation system utilizing generator set |
| CN113404474A (en) * | 2021-07-12 | 2021-09-17 | 大连理工大学 | Vapor source system based on vapor-liquid ejector supercharging flash evaporation technology |
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