CN103453567A - Low vacuum ejector heat pump composite waste-heat heating supply system based on huge temperature-difference heat supply network - Google Patents

Low vacuum ejector heat pump composite waste-heat heating supply system based on huge temperature-difference heat supply network Download PDF

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CN103453567A
CN103453567A CN2013104192059A CN201310419205A CN103453567A CN 103453567 A CN103453567 A CN 103453567A CN 2013104192059 A CN2013104192059 A CN 2013104192059A CN 201310419205 A CN201310419205 A CN 201310419205A CN 103453567 A CN103453567 A CN 103453567A
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heat
supply network
heat pump
exhaust steam
pump based
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张茂勇
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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
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    • Y02P80/10Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
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Abstract

The invention relates to a low vacuum ejector heat pump composite waste-heat heating supply system based on a huge temperature-difference heat supply network, and belongs to the field of waste-heat recovery type combined heat and power generation based on low vacuum circulation water heating and heat exchange of an ejector heat pump. The system is characterized by comprising an ejector heat pump waste-heat recovery device, a dead-steam direct recovery device, a pitch peak heater, a heat supply network huge temperature-difference heat exchange unit and a pipe fitting, wherein the dead steam is taken as a water-based load heat source of the heat supply network; a cold-side inlet of the dead steam direct recovery device is connected with a water return pipe of the heat supply network; an outlet is connected with a heat supply network water inlet of an ejector heat pump condenser; then the dead steam is sent to the pitch peak heater to be heated to the required temperature, and then exhausted out; at last, the dead steam is sent into the dead-steam direct recovery device, and an ejection port in the ejection section of the ejector heat pump. The system can be used for a thermal power plant with higher efficiency than the conventional recovery way that waste-heat is extracted from cooling water, the utilization amount of the dead-steam waste heat can be improved by more than 1-2 times, while the investment is only a part of that of an absorption heat pump.

Description

The compound waste heat for supplying system of low vacuum HEAT PUMP BASED ON EJECTING PRINCIPLE based on super large temperature difference heat supply network
Technical field
The invention belongs to the cogeneration of heat and power field based on waste heat recovery, the exhaust steam straight that particularly a kind of low vacuum waste heat recovery heat supply combines with steam power plant HEAT PUMP BASED ON EJECTING PRINCIPLE waste heat recovery heat supply takes back receiving method and heating system forms.
Background technology
The Major Systems form of at present the northern area of China heating is: cogeneration of heat and power, district boiler room and dispersion heating respectively account for approximately 1/3, wherein the primary energy utilization ratio is the highest, emission reduction effect is best, economy applying of the most rational cogeneration of heat and power be subject to the restriction that fuel price improves, is difficult to expand on a large scale the factors such as heat supply network scale and heat capacity thereof day by day, need badly and take better technology path and policy planning to be promoted.Exhaust steam residual heat reclaims and the Patents technology of super large temperature difference heat supply for carrying out based on the injection type heat exchange of creatively being developed by Tsing-Hua University's building energy conservation research center, can realize adopting HEAT PUMP BASED ON EJECTING PRINCIPLE to reclaim the exhaust steam in steam turbine waste heat for central heating in steam power plant, can make steam power plant's efficiency of energy utilization improve 20~30%, and significantly enlarge its heat capacity.This technology has been applied to engineering practice and has obtained good effects of energy saving and emission reduction and economic benefit.The major defect of this mode be the HEAT PUMP BASED ON EJECTING PRINCIPLE system price high, take up an area large, affect energy saving, investment payback time while reclaiming recirculated water because its temperature is low and grows etc.
The more general turbine exhaust heat heat-supplying mode of another kind of application is so-called low vacuum circulating water heating, exhaust steam in steam turbine condenser to standard configuration is transformed, so that it can adopt the heat supply network backwater to carry out cooling heat transferring, and after being heated to required supply water temperature, the heat supply network backwater is sent to space-heating installation.This mode advantage is that transformation is simple, oepration at full load efficiency is high, invests little, good economy performance, but exist, supply water temperature is lower, supply backwater temperature difference is less, heat supply running is regulated the shortcomings such as dumb, and easily making exhaust stage blade damage speed accelerates, therefore being more suitable for capacity is that the following Steam Turbine of 100,000 kW is transformed, and for the more large-scale heat supply unit of 20~300,000 kW, rarely has the modifier.
HEAT PUMP BASED ON EJECTING PRINCIPLE is as a kind of invention heat pump pattern, and due to its intrinsic low injection ratio characteristic, energy-saving effect is poor and be difficult at practical.
How the advantage of above-mentioned multiple waste heat recovery mode is combined, realize farthest utilizing the exhaust steam residual heat heat supply, to be convenient to regulate heat supply running, energy-saving and emission-reduction benefit and investment return effect again better, is the emphasis direction of next step this field development.
Summary of the invention
The objective of the invention is to solve the technology existed in existing exhaust steam in steam turbine waste heat recovery heat-supplying mode, economic deficiency, the compound waste heat for supplying system of the low vacuum HEAT PUMP BASED ON EJECTING PRINCIPLE of proposition based on super large temperature difference heat supply network, realize more high efficiency and recovery exhaust steam residual heat by a larger margin for heat supply and reduce steam power plant's generating heat consumption rate.
Specific descriptions of the present invention are: the compound waste heat for supplying system of the low vacuum HEAT PUMP BASED ON EJECTING PRINCIPLE based on super large temperature difference heat supply network, it is characterized in that system comprises HEAT PUMP BASED ON EJECTING PRINCIPLE 8 waste-heat recovery devices, exhaust steam oxygen gas direct-recycling device 3 as hot net water base load thermal source, peak regulation heater 9 and heat supply network super large temperature difference heat exchange unit and pipeline pipe fitting form, wherein the cold side import of exhaust steam oxygen gas direct-recycling device 3 exports and is connected with the water out that supplies of cooling tower 5 by circulating cooling water pipe by the heat supply network backwater of heat supply network return pipe and heat supply network heat exchange unit 7, the cold side outlet of exhaust steam oxygen gas direct-recycling device 3 is connected with the condenser 81 hot net water imports of HEAT PUMP BASED ON EJECTING PRINCIPLE 8, the condenser 81 hot net water outlets of HEAT PUMP BASED ON EJECTING PRINCIPLE 8 are connected with the hot net water import of peak regulation heater 9, the hot net water outlet of peak regulation heater 9 is connected for water inlet with the heat supply network of heat supply network heat exchange unit 7 by the heat supply network feed pipe, the exhaust steam that steam turbine 1 is discharged is connected with injection section 82 ejecting ports of HEAT PUMP BASED ON EJECTING PRINCIPLE 8 with the throat's exhaust steam outlet by steam turbine 1 with exhaust steam oxygen gas direct-recycling device 3 respectively, the condensate water of condenser 81 heat source side after condensing heat-exchange of exhaust steam oxygen gas direct-recycling device 3 and HEAT PUMP BASED ON EJECTING PRINCIPLE 8 is connected with the import of condensate pump 2 respectively, the high temperature heat source side-entrance of the nozzle inlet of HEAT PUMP BASED ON EJECTING PRINCIPLE 8 and peak regulation heater 9 is connected with the extraction opening of steam turbine 1 respectively, the heating water outlet of heat supply network heat exchange unit 7 is for past hot user.
HEAT PUMP BASED ON EJECTING PRINCIPLE 8 waste-heat recovery devices adopt multiple-effect superposition type injection heat exchange structure.
HEAT PUMP BASED ON EJECTING PRINCIPLE 8 waste-heat recovery devices adopt the single-stage injection heat exchange structure.
Exhaust steam oxygen gas direct-recycling device 3 is the supporting condenser of turbine generating system standard, and this condenser internal structure is through being adapted as low vacuum circulating water heating structure.
Exhaust steam oxygen gas direct-recycling device 3 is for being independent of the supporting condenser of turbine generating system standard the special-purpose exhaust steam recovery heat exchanger structure in parallel with its condenser.
Throat's exhaust steam outlet of steam turbine 1 adopts the structure of special-shaped exhaust steam outlet, comprise the perforate of one or more than one circle, square or irregular type, when outlet during more than one its fairlead after being aggregated into circular exhaust steam to draw house steward, with the evaporimeter heat source side import of HEAT PUMP BASED ON EJECTING PRINCIPLE 8, be connected.
Heat supply network heat exchange unit 7 adopts the absorption heat pump heat exchange structure.
Technical characterstic of the present invention and beneficial effect: the present invention is intended to the technology existed in existing exhaust steam in steam turbine waste heat recovery heat-supplying mode for solving, economic deficiency, employing is carried out exhaust steam residual heat recovery and super large temperature difference heat supply technology and low vacuum circulating water heating technology based on the injection type heat exchange and is combined, can guarantee the safe and reliable work of condenser and steam turbine last stage and even last three grade blades, can utilize again exhaust steam in steam turbine directly to heat the heat supply network backwater, then segmentation is heated by the HEAT PUMP BASED ON EJECTING PRINCIPLE waste heat recovery, the heating of peak regulation heater, meet the high temperature water requirements, can realize higher waste heat recovery amount and organic efficiency, its exhaust steam utilization and economic benefit can improve more than 1~2 times, and investment only reaches the part of absorption heat pump, farthest improve thus the comprehensive utilization of energy benefit of heat consumption rate and the whole thermal power cogeneration central heating system of steam power plant, there is engineering practical value.
The accompanying drawing explanation
Fig. 1 is the compound waste heat for supplying system architecture of the low vacuum HEAT PUMP BASED ON EJECTING PRINCIPLE schematic diagram based on super large temperature difference heat supply network of the present invention.
In Fig. 1, each unit number and title are as follows.
Steam turbine 1, condensate pump 2, exhaust steam oxygen gas direct-recycling device 3, cooling water circulating pump 4, cooling tower 5, hot net water circulating pump 6, heat supply network heat exchange unit 7, HEAT PUMP BASED ON EJECTING PRINCIPLE 8, HEAT PUMP BASED ON EJECTING PRINCIPLE condenser (81), HEAT PUMP BASED ON EJECTING PRINCIPLE injection section (82), HEAT PUMP BASED ON EJECTING PRINCIPLE injector (83), peak regulation heater 9, steam turbine admission A, condensate water water supply B, steam condensation backwater C, hot user heating water supply D, hot user heating backwater E.
 
The specific embodiment
The compound waste heat for supplying system of low vacuum HEAT PUMP BASED ON EJECTING PRINCIPLE based on super large temperature difference heat supply network of the present invention reaches by reference to the accompanying drawings embodiment and is described in detail as follows.
The specific embodiments of the invention structure, as shown in Figure 1, the specific embodiment and the function declaration of native system are as follows: the compound waste heat for supplying system of the low vacuum HEAT PUMP BASED ON EJECTING PRINCIPLE based on super large temperature difference heat supply network, system comprises HEAT PUMP BASED ON EJECTING PRINCIPLE 8 waste-heat recovery devices, exhaust steam oxygen gas direct-recycling device 3 as hot net water base load thermal source, peak regulation heater 9 and heat supply network super large temperature difference heat exchange unit and pipeline pipe fitting form, wherein the cold side import of exhaust steam oxygen gas direct-recycling device 3 exports and is connected with the water out that supplies of cooling tower 5 by circulating cooling water pipe by the heat supply network backwater of heat supply network return pipe and heat supply network heat exchange unit 7, the cold side outlet of exhaust steam oxygen gas direct-recycling device 3 is connected with the condenser 81 hot net water imports of HEAT PUMP BASED ON EJECTING PRINCIPLE 8, the condenser 81 hot net water outlets of HEAT PUMP BASED ON EJECTING PRINCIPLE 8 are connected with the hot net water import of peak regulation heater 9, the hot net water outlet of peak regulation heater 9 is connected for water inlet with the heat supply network of heat supply network heat exchange unit 7 by the heat supply network feed pipe, the exhaust steam that steam turbine 1 is discharged is connected with injection section 82 ejecting ports of HEAT PUMP BASED ON EJECTING PRINCIPLE 8 with the throat's exhaust steam outlet by steam turbine 1 with exhaust steam oxygen gas direct-recycling device 3 respectively, the condensate water of condenser 81 heat source side after condensing heat-exchange of exhaust steam oxygen gas direct-recycling device 3 and HEAT PUMP BASED ON EJECTING PRINCIPLE 8 is connected with the import of condensate pump 2 respectively, the high temperature heat source side-entrance of the nozzle inlet of HEAT PUMP BASED ON EJECTING PRINCIPLE 8 and peak regulation heater 9 is connected with the extraction opening of steam turbine 1 respectively, the heating water outlet of heat supply network heat exchange unit 7 is for past hot user.
HEAT PUMP BASED ON EJECTING PRINCIPLE 8 waste-heat recovery devices adopt the single-stage injection heat exchange structure.
Exhaust steam oxygen gas direct-recycling device 3 is the supporting condenser of turbine generating system standard, and this condenser internal structure is through being adapted as low vacuum circulating water heating structure.
Throat's exhaust steam outlet of steam turbine 1 adopts the structure of special-shaped exhaust steam outlet, comprise the perforate of one or more than one circle, square or irregular type, when outlet during more than one its fairlead after being aggregated into circular exhaust steam to draw house steward, with the evaporimeter heat source side import of HEAT PUMP BASED ON EJECTING PRINCIPLE 8, be connected.
Heat supply network heat exchange unit 7 adopts the absorption heat pump heat exchange structure.
It should be noted that, the present invention proposes reclaim how more efficiently the exhaust steam in steam turbine waste heat method, and according to this overall solution, different concrete implementing measures and the concrete device for carrying out said of different structure can be arranged, the above-mentioned specific embodiment is only wherein a kind of.Other is similarly the protection domain that enforceable mode all falls into this patent through simple deformation.

Claims (7)

1. the compound waste heat for supplying system of the low vacuum HEAT PUMP BASED ON EJECTING PRINCIPLE based on super large temperature difference heat supply network, it is characterized in that system comprises HEAT PUMP BASED ON EJECTING PRINCIPLE (8) waste-heat recovery device, exhaust steam oxygen gas direct-recycling device (3) as hot net water base load thermal source, peak regulation heater (9) and heat supply network super large temperature difference heat exchange unit and pipeline pipe fitting form, wherein the cold side import of exhaust steam oxygen gas direct-recycling device (3) exports and is connected with the water out that supplies of cooling tower (5) by circulating cooling water pipe by the heat supply network backwater of heat supply network return pipe and heat supply network heat exchange unit (7), the cold side outlet of exhaust steam oxygen gas direct-recycling device (3) is connected with condenser (81) the hot net water import of HEAT PUMP BASED ON EJECTING PRINCIPLE (8), condenser (81) the hot net water outlet of HEAT PUMP BASED ON EJECTING PRINCIPLE (8) is connected with the hot net water import of peak regulation heater (9), the hot net water outlet of peak regulation heater (9) is connected for water inlet with the heat supply network of heat supply network heat exchange unit (7) by the heat supply network feed pipe, the exhaust steam that steam turbine (1) is discharged is connected with injection section (82) ejecting port of HEAT PUMP BASED ON EJECTING PRINCIPLE (8) with the throat's exhaust steam outlet by steam turbine (1) with exhaust steam oxygen gas direct-recycling device (3) respectively, the condensate water of condenser (81) heat source side after condensing heat-exchange of exhaust steam oxygen gas direct-recycling device (3) and HEAT PUMP BASED ON EJECTING PRINCIPLE (8) is connected with the import of condensate pump (2) respectively, the high temperature heat source side-entrance of the nozzle inlet of HEAT PUMP BASED ON EJECTING PRINCIPLE (8) and peak regulation heater (9) is connected with the extraction opening of steam turbine (1) respectively, the heating water outlet of heat supply network heat exchange unit (7) is for past hot user.
2. the compound waste heat for supplying system of the low vacuum HEAT PUMP BASED ON EJECTING PRINCIPLE based on super large temperature difference heat supply network as claimed in claim 1, is characterized in that, described HEAT PUMP BASED ON EJECTING PRINCIPLE (8) waste-heat recovery device adopts multiple-effect superposition type injection heat exchange structure.
3. the compound waste heat for supplying system of the low vacuum HEAT PUMP BASED ON EJECTING PRINCIPLE based on super large temperature difference heat supply network as claimed in claim 1, is characterized in that, described HEAT PUMP BASED ON EJECTING PRINCIPLE (8) waste-heat recovery device adopts the single-stage injection heat exchange structure.
4. the compound waste heat for supplying system of the low vacuum HEAT PUMP BASED ON EJECTING PRINCIPLE based on super large temperature difference heat supply network as claimed in claim 1, it is characterized in that, described exhaust steam oxygen gas direct-recycling device (3) is the supporting condenser of turbine generating system standard, and this condenser internal structure is through being adapted as low vacuum circulating water heating structure.
5. the compound waste heat for supplying system of the low vacuum HEAT PUMP BASED ON EJECTING PRINCIPLE based on super large temperature difference heat supply network as claimed in claim 1, it is characterized in that, described exhaust steam oxygen gas direct-recycling device (3) is for being independent of the supporting condenser of turbine generating system standard the special-purpose exhaust steam recovery heat exchanger structure in parallel with its condenser.
6. the compound waste heat for supplying system of the low vacuum HEAT PUMP BASED ON EJECTING PRINCIPLE based on super large temperature difference heat supply network as claimed in claim 1, it is characterized in that, throat's exhaust steam outlet of described steam turbine (1) adopts the structure of special-shaped exhaust steam outlet, comprise the perforate of one or more than one circle, square or irregular type, when outlet during more than one its fairlead after being aggregated into circular exhaust steam to draw house steward, with the evaporimeter heat source side import of HEAT PUMP BASED ON EJECTING PRINCIPLE (8), be connected.
7. the compound waste heat for supplying system of the low vacuum HEAT PUMP BASED ON EJECTING PRINCIPLE based on super large temperature difference heat supply network as claimed in claim 1, is characterized in that, described heat supply network heat exchange unit (7) adopts the absorption heat pump heat exchange structure.
CN2013104192059A 2013-09-15 2013-09-15 Low vacuum ejector heat pump composite waste-heat heating supply system based on huge temperature-difference heat supply network Pending CN103453567A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106989429A (en) * 2017-05-10 2017-07-28 程琛 Exhaust steam of electric power plant waste heat recovery heating system
CN107702182A (en) * 2017-09-01 2018-02-16 中清源环保节能有限公司 A kind of big temperature difference recovery exhaust steam residual heat system in coal-burning power plant's heat supply initial station
CN114754398A (en) * 2022-03-11 2022-07-15 华电电力科学研究院有限公司 Combined heat and power generation system and method capable of simultaneously heating water for heat supply network and steam for heat supply network

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RU2266479C1 (en) * 2004-05-31 2005-12-20 Стенин Валерий Александрович Heat supplying method
CN101231004A (en) * 2008-02-28 2008-07-30 清华大学 Large temperature-difference central heating system
CN102278786A (en) * 2011-08-13 2011-12-14 双良节能***股份有限公司 Central heating system using waste heat of direct air cooling power plant
CN102297467A (en) * 2011-08-19 2011-12-28 清华大学 Centralized heat supply system for low-temperature backwater
CN202350165U (en) * 2011-12-08 2012-07-25 北京中科华誉能源技术发展有限责任公司 Device for recycling residual heat of exhaust steam of steam turbine by using multi-effect overlapped spraying type heat pump
CN202596802U (en) * 2011-12-30 2012-12-12 北京中科华誉能源技术发展有限责任公司 Steam waste pressure and waste heat power generation and balance steam supply and heat supply modularization device
CN103175247A (en) * 2011-12-23 2013-06-26 河南艾莫卡节能科技有限公司 Heating method of absorption type heat pump and multilevel series-connected absorption type heat pump heating system
CN203489341U (en) * 2013-09-15 2014-03-19 张茂勇 Superlarge temperature difference heat supply network waste heat heating system combined with low-vacuum injection type heat pump

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2266479C1 (en) * 2004-05-31 2005-12-20 Стенин Валерий Александрович Heat supplying method
CN101231004A (en) * 2008-02-28 2008-07-30 清华大学 Large temperature-difference central heating system
CN102278786A (en) * 2011-08-13 2011-12-14 双良节能***股份有限公司 Central heating system using waste heat of direct air cooling power plant
CN102297467A (en) * 2011-08-19 2011-12-28 清华大学 Centralized heat supply system for low-temperature backwater
CN202350165U (en) * 2011-12-08 2012-07-25 北京中科华誉能源技术发展有限责任公司 Device for recycling residual heat of exhaust steam of steam turbine by using multi-effect overlapped spraying type heat pump
CN103175247A (en) * 2011-12-23 2013-06-26 河南艾莫卡节能科技有限公司 Heating method of absorption type heat pump and multilevel series-connected absorption type heat pump heating system
CN202596802U (en) * 2011-12-30 2012-12-12 北京中科华誉能源技术发展有限责任公司 Steam waste pressure and waste heat power generation and balance steam supply and heat supply modularization device
CN203489341U (en) * 2013-09-15 2014-03-19 张茂勇 Superlarge temperature difference heat supply network waste heat heating system combined with low-vacuum injection type heat pump

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106989429A (en) * 2017-05-10 2017-07-28 程琛 Exhaust steam of electric power plant waste heat recovery heating system
CN106989429B (en) * 2017-05-10 2022-08-09 程琛 Power plant exhaust steam waste heat recovery heating system
CN107702182A (en) * 2017-09-01 2018-02-16 中清源环保节能有限公司 A kind of big temperature difference recovery exhaust steam residual heat system in coal-burning power plant's heat supply initial station
CN114754398A (en) * 2022-03-11 2022-07-15 华电电力科学研究院有限公司 Combined heat and power generation system and method capable of simultaneously heating water for heat supply network and steam for heat supply network
CN114754398B (en) * 2022-03-11 2023-06-27 华电电力科学研究院有限公司 Cogeneration system and method capable of heating water for heat supply network and steam for heat supply network simultaneously

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Application publication date: 20131218