CN104296544A - Low-temperature cogeneration flashing system - Google Patents

Low-temperature cogeneration flashing system Download PDF

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Publication number
CN104296544A
CN104296544A CN201410534918.4A CN201410534918A CN104296544A CN 104296544 A CN104296544 A CN 104296544A CN 201410534918 A CN201410534918 A CN 201410534918A CN 104296544 A CN104296544 A CN 104296544A
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Prior art keywords
working medium
connects
pipeline
heater
boiler
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CN201410534918.4A
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CN104296544B (en
Inventor
黄高泉
彭岩
侯昊
王新建
时小宝
刘怀亮
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Citic Heavy Industries Co Ltd
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Citic Heavy Industries Co Ltd
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00Combustion technologies with mitigation potential
    • Y02E20/14Combined heat and power generation [CHP]
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00Technologies related to metal processing
    • Y02P10/25Process efficiency
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P80/00Climate change mitigation technologies for sector-wide applications
    • Y02P80/10Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
    • Y02P80/15On-site combined power, heat or cool generation or distribution, e.g. combined heat and power [CHP] supply

Abstract

Disclosed is a low-temperature cogeneration flashing system. The low-temperature cogeneration flashing system heats organic working medium in a steam phase change heat transfer mode and generates organic vapor in a flashing mode; the vapor is condensated into water on the shell set of a heater (3), and then the condensate water is fed into a deoxidizer through a condensate pump for deoxidization and then serves as boiler feed water for continuous heat absorption and evaporation; the organic working medium is heated inside a heater to a certain high temperature and then flashed inside a flashing tank into saturated vapor; after gas-liquid separation, the saturated vapor is used for driving an organic working medium turbine to drive a generator to produce electricity; exhaust steam of the organic working medium turbine is condensated through a condenser and then mixed with the liquid working medium inside the flashing tank, and then the mixture is pressurized through an organic working medium pump and preheated inside a preheater at the tail flue of a waste heat boiler and then enters an organic working medium heater. The low-temperature cogeneration flashing system has the advantages of being simple in operation, low in cost, easy to control and high in safety.

Description

A kind of low-temperature cogeneration flash system
[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 large because having output, 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 generally at 200 ~ 250 DEG C, belong to low-temperature flue gas waste heat, at present, discharged at lower temperature type lime rotary kiln cogeneration technology belongs to blank substantially 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 forever steel 2 × 600t/d limekiln exhaust gas temperature up to 450 DEG C, and auxiliary construction Waste Heat Power Station power benefit is good, but it is not representative, therefore still there is following shortcoming at present in lime rotary kiln cogeneration technology:
1, water vapour Lang Ken cycle efficieny is low, cannot high efficiente callback fume afterheat;
2, then there is working medium filling quantity according to single working medium organic media Lang Ken circulation large, the problems such as corresponding vapo(u)rization system difficult design, working medium reclaim, storage difficulty;
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 and also can adopt kalina technology, but this system complicated, implement that difficulty is large, ammonia reveals shortcomings such as easily causing 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 flash tank shwoot again go out saturated vapor by organic working medium being heated in the heater certain high temperature, saturated vapor is after gas-liquid separation, steam produces electric energy for driving organic working medium turbine drive electrical generators, and the present invention has simple to operate, relative inexpensiveness, control is simple, security is high feature.
For realizing goal of the invention as above, the present invention adopts technical scheme as described below:
A kind of low-temperature cogeneration flash system, comprise oxygen-eliminating device, heater, condensate pump, flash tank, organic working medium turbine, generator, condenser, evaporative type cooler, working medium pump, feed pump, preheater, economizer, drum, boiler body evaporimeter and boiler body superheater, the delivery port of described economizer connects the water inlet of drum by pipeline, the delivery port of described drum connects the water inlet of boiler body evaporimeter by pipeline, the steam (vapor) outlet of described boiler body evaporimeter 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 condensate water outlet of described heater connects the water inlet of condensate pump by pipeline, the delivery port of described condensate pump connects the water inlet of oxygen-eliminating device by pipeline, the delivery port of described oxygen-eliminating device connects the water inlet of feed pump by pipeline, the delivery port 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 generator, 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, condensation section, hydrophobic section.
Described low-temperature cogeneration flash system, described preheater is arranged on the below of waste heat boiler.
Described low-temperature cogeneration flash system, described working medium pump is diaphragm type or screw.
Adopt technical scheme as above, the present invention has superiority as described below:
A kind of low-temperature cogeneration flash system of the present invention, the present invention adopts water vapour phase-change heat transfer mode heating 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 is heated to certain high temperature in the heater and enters flash tank shwoot again and go out saturated vapor, saturated vapor is after gas-liquid separation, steam produces electric energy for driving organic working medium turbine drive electrical generators, the exhaust steam of organic working medium turbine converges with the liquid refrigerant in flash tank the preheater sending into waste heat boiler back-end ductwork after organic working medium pump pressurizes again after condenser condensation, organic working medium heater is entered again after preheating, the present invention has simple to operate, relative inexpensiveness, control simple, the feature that security is high.
[accompanying drawing explanation]
Fig. 1 is 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, generator; 8, condenser; 9, evaporative type cooler; 10, working medium pump; 11, feed pump; 12, preheater; 13, economizer; 14, drum; 15, boiler body evaporimeter; 16, boiler body superheater.
[detailed description of the invention]
Can explain the present invention in more detail by the following examples, the present invention is not limited to the following examples;
1 a kind of low-temperature cogeneration flash system of the present invention by reference to the accompanying drawings, comprise oxygen-eliminating device 2, heater 3, condensate pump 4, flash tank 5, organic working medium turbine 6, generator 7, condenser 8, evaporative type cooler 9, working medium pump 10, feed pump 11, preheater 12, economizer 13, drum 14, boiler body evaporimeter 15 and boiler body superheater 16, the top of described preheater 12 is provided with 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, the delivery port of described economizer 13 connects the water inlet of drum 14 by pipeline, the delivery port of described drum 14 connects the water inlet of boiler body evaporimeter 15 by pipeline, the steam (vapor) outlet of described boiler body evaporimeter 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 condensate water outlet of described heater 3 shell-side connects the water inlet of condensate pump 4 by pipeline, the delivery port of described condensate pump 4 connects the water inlet of oxygen-eliminating device 2 by pipeline, the delivery port of described oxygen-eliminating device 2 connects the water inlet of feed pump 11 by pipeline, the delivery port 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 generator 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 enters the low-temperature cogeneration flash system described in interruption-forming by pipeline connection working medium pump 10.
The present invention with feed pump 11 for starting point, water is introduced into economizer 13, out drum 14 is entered afterwards from economizer 13, again from drum 14 out, enter boiler body evaporimeter 15, now water is flashed to the steam of saturated mode by boiler body evaporimeter 15, saturated vapor turns back in drum 14 again and carries out gas-liquid separation, leave drum 14 after gas-liquid separation again and enter the steam that boiler body superheater 16 became hot, cross hot steam and enter heater 3 from boiler body superheater 16 outlet, in the present invention, drum 14 is arranged to meet certain circulating ratio in the boiler circuit of boiler body, it acts on mainly carbonated drink and is separated.
The present invention's waste heat boiler 1 when implementing produces the R123 that low-pressure superheated steam enters 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 produces electric energy for driving organic working medium turbine 6 drive electrical generators 7, organic working medium turbine 6 exhaust steam converges with the liquid refrigerant in flash tank 5 after condenser 8 condenses again, and is pressurizeed send into preheater 12 by working medium pump 10; Preheater 12 is arranged on the back-end ductwork of waste heat boiler 1.Pressurizeed by working medium pump 10 after condensation water in liquid refrigerant bottom flash tank 5 and condenser 8 converges and send into preheater 12.Oxygen-eliminating device 2 adopts chemical dosing deoxygenation.Condensate water is sent into oxygen-eliminating device 2 by condensate pump 4, sends into boiler heat absorption evaporation after deoxygenation by feed pump 11; Wherein heater 3 inside adopts thermal power steam turbine bleeder heater version, is superheat section, condensation section, hydrophobic section according to shell fluid state demarcation.
The organic working medium boiling point used in the present invention is low, higher than water saturation pressure at identical temperature, therefore organic working medium can be heated to high temperature under liquid condition, 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, the step realizing 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 sends into oxygen-eliminating device 2 by condensate pump, continues heat absorption evaporation after deoxygenation as boiler feedwater.Organic working medium is heated to enter flash tank 5 shwoot again to certain high temperature and goes out saturated vapor in heater 3, saturated vapor is after gas-liquid separation, steam produces electric energy for driving organic working medium turbine 6 drive electrical generators 7, 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, enter organic working medium heater 3 pipe side after preheating again.
Part not in the detailed description of the invention is prior art.
The embodiment selected in this article in order to open object of the present invention, currently thinks to be suitable for, but it is to be understood that the present invention is intended to comprise all changes belonging to the embodiment in this design and invention scope and improvement.

Claims (4)

1. a low-temperature cogeneration flash system, comprise oxygen-eliminating device (2), heater (3), condensate pump (4), flash tank (5), organic working medium turbine (6), generator (7), condenser (8), evaporative type cooler (9), working medium pump (10), feed pump (11), preheater (12), economizer (13), drum (14), boiler body evaporimeter (15) and boiler body superheater (16), it is characterized in that: the delivery port of described economizer (13) connects the water inlet of drum (14) by pipeline, the delivery port of described drum (14) connects the water inlet of boiler body evaporimeter (15) by pipeline, the steam (vapor) outlet of described boiler body evaporimeter (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 condensate water outlet of described heater (3) connects the water inlet of condensate pump (4) by pipeline, the delivery port of described condensate pump (4) connects the water inlet of oxygen-eliminating device (2) by pipeline, the delivery port of described oxygen-eliminating device (2) connects the water inlet of feed pump (11) by pipeline, the delivery port 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 generator (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 the low-temperature cogeneration flash system described in working medium pump (10) formation by pipeline.
2. low-temperature cogeneration flash system according to claim 1, is characterized in that: the version of described heater (3) is similar to steam turbine bleeder heater structure, and inside can be divided into superheat section, condensation section, hydrophobic section.
3. low-temperature cogeneration flash system according to claim 1, is characterized in that: described preheater (12) is arranged on the below 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.
CN201410534918.4A 2014-10-13 2014-10-13 A kind of low-temperature cogeneration flash system Active CN104296544B (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105782994A (en) * 2016-05-03 2016-07-20 广州维港环保科技有限公司 Waste-heat power generation system used in industrial hazardous waste disposal industry
CN107504823A (en) * 2016-12-30 2017-12-22 华北水利水电大学 A kind of organic Rankine bottoming cycle afterheat generating system based on falling film evaporator
CN108167027A (en) * 2017-12-27 2018-06-15 山西晋城无烟煤矿业集团有限责任公司 Pressurized gasification chilling process vacuum flash vapour electricity-generating method
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

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* Cited by examiner, † Cited by third party
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CN105782994A (en) * 2016-05-03 2016-07-20 广州维港环保科技有限公司 Waste-heat power generation system used in industrial hazardous waste disposal industry
CN105782994B (en) * 2016-05-03 2018-03-13 广州维港环保科技有限公司 A kind of afterheat generating system for industrial dangerous waste disposal industry
CN107504823A (en) * 2016-12-30 2017-12-22 华北水利水电大学 A kind of organic Rankine bottoming cycle afterheat generating system based on falling film evaporator
CN107504823B (en) * 2016-12-30 2019-01-11 华北水利水电大学 A kind of Organic Rankine Cycle afterheat generating system based on falling film evaporator
CN108167027A (en) * 2017-12-27 2018-06-15 山西晋城无烟煤矿业集团有限责任公司 Pressurized gasification chilling process vacuum flash vapour electricity-generating method
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

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