CN110567026A - Thermoelectric decoupling system of heat storage tank coupling absorption heat pump and operation method - Google Patents
Thermoelectric decoupling system of heat storage tank coupling absorption heat pump and operation method Download PDFInfo
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- 238000005338 heat storage Methods 0.000 title claims abstract description 105
- 238000010521 absorption reaction Methods 0.000 title claims abstract description 23
- 238000000034 method Methods 0.000 title claims abstract description 8
- 230000008878 coupling Effects 0.000 title claims 2
- 238000010168 coupling process Methods 0.000 title claims 2
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- 230000001105 regulatory effect Effects 0.000 claims abstract description 107
- 239000006096 absorbing agent Substances 0.000 claims abstract description 37
- 238000010438 heat treatment Methods 0.000 claims abstract description 18
- 238000000605 extraction Methods 0.000 claims abstract description 6
- 239000003507 refrigerant Substances 0.000 claims description 25
- 230000001172 regenerating effect Effects 0.000 claims description 10
- 238000005057 refrigeration Methods 0.000 claims description 4
- 230000002745 absorbent Effects 0.000 claims description 3
- 239000002250 absorbent Substances 0.000 claims description 3
- 238000003303 reheating Methods 0.000 claims description 3
- 238000001704 evaporation Methods 0.000 abstract description 2
- 230000008020 evaporation Effects 0.000 abstract description 2
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K17/00—Using steam or condensate extracted or exhausted from steam engine plant
- F01K17/005—Using steam or condensate extracted or exhausted from steam engine plant by means of a heat pump
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D11/00—Central heating systems using heat accumulated in storage masses
- F24D11/02—Central heating systems using heat accumulated in storage masses using heat pumps
- F24D11/0214—Central heating systems using heat accumulated in storage masses using heat pumps water heating system
- F24D11/0228—Central heating systems using heat accumulated in storage masses using heat pumps water heating system combined with conventional heater
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D19/00—Details
- F24D19/10—Arrangement or mounting of control or safety devices
- F24D19/1006—Arrangement or mounting of control or safety devices for water heating systems
- F24D19/1009—Arrangement or mounting of control or safety devices for water heating systems for central heating
- F24D19/1015—Arrangement or mounting of control or safety devices for water heating systems for central heating using a valve or valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B30/00—Heat pumps
- F25B30/04—Heat pumps of the sorption type
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B40/00—Subcoolers, desuperheaters or superheaters
- F25B40/06—Superheaters
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D2200/00—Heat sources or energy sources
- F24D2200/12—Heat pump
- F24D2200/126—Absorption type heat pumps
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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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Abstract
本发明公开了一种储热罐耦合吸收式热泵的热电解耦系统及运行方法，该热电解耦系统由储热罐、热水水泵、储热热水调节阀、第一放热热水调节阀、第二放热热水调节阀、热网加热器、热用户、热网循环泵、冷水水泵、储热冷水调节阀、第一放热冷水调节阀、第二放热冷水调节阀、蒸发器、第一节流阀、冷凝器、发生器、回热加热器、第二节流阀、溶液泵、吸收器和调节阀组成；本发明还公开了该系统的运行方法；本发明通过在储热罐冷水管道中增设一个吸收式热泵，使进入储热罐的冷水温度降低，扩大了储热罐冷热水温差，从而减小储热罐的水量，体积减小，同时，吸收式热泵消耗部分汽轮机供热抽汽，促使机组供热抽减小，热电联产机组的深度调峰性能有所提升。
The invention discloses a thermoelectric decoupling system and an operation method of a heat storage tank coupled with an absorption heat pump. valve, second exothermic hot water regulating valve, heating network heater, heat user, heating network circulation pump, cold water pump, heat storage cold water regulating valve, first exothermic cold water regulating valve, second exothermic cold water regulating valve, evaporation device, a first throttle valve, a condenser, a generator, a recuperation heater, a second throttle valve, a solution pump, an absorber and a regulating valve; the invention also discloses the operating method of the system; An absorption heat pump is added to the cold water pipeline of the heat storage tank to reduce the temperature of the cold water entering the heat storage tank and expand the temperature difference between the cold and hot water of the heat storage tank, thereby reducing the water volume and volume of the heat storage tank. At the same time, the absorption heat pump Consuming part of the steam turbine for heating and extracting steam reduces the heat supply and extraction of the unit, and the deep peak-shaving performance of the combined heat and power unit is improved.
Description
技术领域technical field
本发明涉及一种热电解耦系统，具体涉及一种储热罐耦合吸收式热泵的热电解耦系统及运行方法。The invention relates to a thermoelectric decoupling system, in particular to a thermoelectric decoupling system and an operation method of a heat storage tank coupled with an absorption heat pump.
背景技术Background technique
我国70％以上煤电都是热电机组，热电联产机组“以热定电”的运行模式极大限制了其灵活运行，在冬季供热期间，即使在保障供热的最小出力状态下，很多地区的风电接纳空间也大大受限。为降低环境污染，解决日益严重的弃风(光)问题，提高新能源的消纳能力，必须提高热电机组的运行灵活性。提升热电联产机组灵活性的有效手段为热电解耦改造，而储热罐是一种有效的热电解耦方案，其能够起到“削峰填谷”的作用，热负荷较低时，储存热量，在热负荷较高时，放出热量，弥补热量的不足。More than 70% of coal-fired power plants in my country are thermoelectric units, and the operation mode of cogeneration units that "determines electricity by heat" greatly limits their flexible operation. The space for wind power acceptance in the region is also greatly limited. In order to reduce environmental pollution, solve the increasingly serious problem of curtailed wind (light) and improve the capacity of absorbing new energy, it is necessary to improve the operating flexibility of thermal power units. An effective means to improve the flexibility of cogeneration units is thermoelectric decoupling transformation, and heat storage tank is an effective thermoelectric decoupling solution, which can play the role of "shaving peaks and filling valleys". When the heat load is low, storage Heat, when the heat load is high, it releases heat to make up for the lack of heat.
然而，在热电厂中运用的储热罐为热水储热罐，其体积较大，占地面积多，投资也较大，极大的制约了储热罐在热电厂中的应用，同时储热罐对于热电联产机组灵活性的提升也有一定的限制。However, the heat storage tanks used in thermal power plants are hot water heat storage tanks, which are large in size, occupy a large area, and require a large investment, which greatly restricts the application of heat storage tanks in thermal power plants. There are also certain restrictions on the improvement of the flexibility of cogeneration units.
在储热量一定的条件下，如何减小储热罐罐体的体积，减少其占地面积和投资，同时，如何扩大其对于调峰性能的提升是亟待解决的关键问题。Under the condition of a certain amount of heat storage, how to reduce the volume of the heat storage tank, reduce its floor area and investment, and how to expand it to improve the peak-shaving performance is a key problem that needs to be solved urgently.
发明内容Contents of the invention
为了克服上述现有技术存在的问题，本发明的目的是提供一种储热罐耦合吸收式热泵的热电解耦系统及运行方法，通过在储热罐冷水管道中增设一个吸收式热泵，使进入储热罐的冷水温度降低，扩大了储热罐冷热水温差，从而减小储热罐的水量，体积减小，同时，吸收式热泵消耗部分汽轮机供热抽汽，促使机组供热抽减小，热电联产机组的深度调峰性能有所提升。In order to overcome the above-mentioned problems in the prior art, the object of the present invention is to provide a thermoelectric decoupling system and operation method of a heat storage tank coupled with an absorption heat pump. By adding an absorption heat pump to the cold water pipeline of the heat storage tank, The temperature of the cold water in the heat storage tank is lowered, which expands the temperature difference between the cold and hot water of the heat storage tank, thereby reducing the water volume and volume of the heat storage tank. Small, the deep peak-shaving performance of the combined heat and power unit has been improved.
本发明是通过以下技术方案实现：The present invention is realized through the following technical solutions:
一种储热罐耦合吸收式热泵的热电解耦系统，由储热罐1、热水水泵21、储热热水调节阀22、第一放热热水调节阀23、第二放热热水调节阀24、热网加热器3、热用户4、热网循环泵5、冷水水泵61、储热冷水调节阀62、第一放热冷水调节阀63、第二放热冷水调节阀65、蒸发器641、第一节流阀642、冷凝器643、发生器644、回热加热器645、第二节流阀646、溶液泵647、吸收器648和调节阀7组成；A thermoelectric decoupling system of a heat storage tank coupled with an absorption heat pump, comprising a heat storage tank 1, a hot water pump 21, a heat storage hot water regulating valve 22, a first exothermic hot water regulating valve 23, a second exothermic hot water Regulating valve 24, heating network heater 3, heating user 4, heating network circulating pump 5, cold water pump 61, heat storage cold water regulating valve 62, first exothermic cold water regulating valve 63, second exothermic cold water regulating valve 65, evaporation A device 641, a first throttle valve 642, a condenser 643, a generator 644, a recuperation heater 645, a second throttle valve 646, a solution pump 647, an absorber 648 and a regulating valve 7;
所述储热罐1热水管道通过储热热水调节阀22与热水水泵21出口相连，热水水泵21入口与热网加热器3热水出口相连，热网加热器3热水出口还与热用户4入口相连，热用户4出口通过热网循环泵5与热网加热器3冷水入口相连；热水泵21入口还与储热罐1热水管道通过第一放热热水调节阀23相连，热水水泵21出口还通过第二放热热水调节阀24与热用户4入口相连；储热罐1冷水管道与冷水水泵61入口连通，冷水水泵61出口通过储热冷水调节阀62与热网加热器3冷水入口相连，冷水泵61入口还通过蒸发器641、第一放热冷水调节阀63与热网循环泵5出口相连，冷水泵61出口还通过第二放热冷水调节阀65与储热罐1冷水管道相连；热网循环泵5出口还通过吸收器648、冷凝器643、调节阀7与热用户4入口相连；所述蒸发器641、吸收器648、发生器644、回热加热器645、溶液泵647、第一节流阀642、第二节流阀646组成吸收式热泵；蒸发器641制冷剂入口通过第一节流阀642与冷凝器643制冷剂出口相连，蒸发器641制冷剂出口通过管道与吸收器648制冷剂入口相连，吸收器648溶液入口通过第二节流阀646、回热加热器645与发生器644溶液出口相连，吸收器648稀溶液出口通过溶液泵647、回热加热器645与发生器644溶液入口相连，发生器644制冷剂出口与冷凝器643制冷剂入口相连。The hot water pipeline of the heat storage tank 1 is connected to the outlet of the hot water pump 21 through the heat storage hot water regulating valve 22, the inlet of the hot water pump 21 is connected to the hot water outlet of the heat network heater 3, and the hot water outlet of the heat network heater 3 is also It is connected with the heat user 4 inlet, and the heat user 4 outlet is connected with the heat network heater 3 cold water inlet through the heat network circulation pump 5; the hot water pump 21 inlet is also connected with the heat storage tank 1 hot water pipeline through the first exothermic hot water regulating valve 23 The outlet of the hot water pump 21 is also connected with the inlet of the heat user 4 through the second exothermic hot water regulating valve 24; the cold water pipe of the heat storage tank 1 is connected with the inlet of the cold water pump 61, and the outlet of the cold water pump 61 is connected with the heat storage cold water regulating valve 62. The cold water inlet of the heat network heater 3 is connected, the inlet of the cold water pump 61 is also connected with the outlet of the heat network circulation pump 5 through the evaporator 641 and the first exothermic cold water regulating valve 63, and the outlet of the cold water pump 61 is also passed through the second exothermic cold water regulating valve 65 It is connected with the cold water pipeline of heat storage tank 1; the outlet of heat network circulation pump 5 is also connected with the inlet of heat user 4 through absorber 648, condenser 643 and regulating valve 7; the evaporator 641, absorber 648, generator 644, return The heat heater 645, the solution pump 647, the first throttle valve 642, and the second throttle valve 646 form an absorption heat pump; the refrigerant inlet of the evaporator 641 is connected with the refrigerant outlet of the condenser 643 through the first throttle valve 642, and evaporates The refrigerant outlet of the generator 641 is connected with the refrigerant inlet of the absorber 648 through a pipeline, the solution inlet of the absorber 648 is connected with the solution outlet of the generator 644 through the second throttle valve 646 and the recuperation heater 645, and the diluted solution outlet of the absorber 648 is passed through the solution The pump 647 and the regenerative heater 645 are connected to the solution inlet of the generator 644 , and the refrigerant outlet of the generator 644 is connected to the refrigerant inlet of the condenser 643 .
所述发生器644的驱动蒸汽为汽轮机的供热抽汽。The driving steam of the generator 644 is the heating and extraction steam of the steam turbine.
所述的一种储热罐耦合吸收式热泵的热电解耦系统的运行方法，包括储热罐储热模式和储热罐放热模式，具体如下：The operation method of the thermoelectric decoupling system of a heat storage tank coupled with an absorption heat pump includes a heat storage tank heat storage mode and a heat storage tank heat release mode, specifically as follows:
储热罐储热模式：储热热水调节阀22和储热冷水调节阀62打开，第一放热热水调节阀23、第二放热热水调节阀24、第一放热冷水调节阀63、第二放热冷水调节阀65和调节阀7关闭，此时，吸收式热泵不启动；冷水在热网加热器3加热后送入热用户4供热，热用户4出口冷水经过热网循环泵5输送至热网加热器3入口；同时热网加热器3出口一部分多余热水将由热水水泵21经过储热热水调节阀22输送至储热罐1储存，储热罐1下部冷水由冷水水泵61经储热冷水调节阀62输送至热网加热器3入口重新加热；Heat storage tank heat storage mode: heat storage hot water regulating valve 22 and heat storage cold water regulating valve 62 are opened, the first exothermic hot water regulating valve 23, the second exothermic hot water regulating valve 24, the first exothermic cold water regulating valve 63. The second exothermic cold water regulating valve 65 and regulating valve 7 are closed. At this time, the absorption heat pump does not start; the cold water is sent to the heat user 4 for heating after being heated by the heat network heater 3, and the cold water from the heat user 4 exits through the heat network Circulation pump 5 transports to the inlet of heat network heater 3; at the same time, part of the excess hot water at the outlet of heat network heater 3 will be transported by hot water pump 21 to heat storage tank 1 through heat storage hot water regulating valve 22 for storage, and the lower part of heat storage tank 1 is cold water The cold water pump 61 is transported to the inlet of the heating network heater 3 through the heat storage cold water regulating valve 62 for reheating;
储热罐放热模式：包括热网水循环和制冷循环；所述热网水循环为：第一放热热水调节阀23、第二放热热水调节阀24、第一放热冷水调节阀63、第二放热冷水调节阀65和调节阀7打开，储热热水调节阀22和储热冷水调节阀62关闭，此时，吸收式热泵启动，由热网加热器3、储热罐1、冷凝器643和吸收器648共同向热用户4供热；热网加热器3出口热水送入热用户4入口，同时，储热罐1中的热水通过第一放热热水调节阀23、热水泵21、第二放热热水调节阀24送入热用户4入口；热用户4出口冷水经热网循环泵5后一部分输送入热网加热器3入口，另一部分依次经过吸收器648和冷凝器643加热后送回热用户4入口，还有一部分依次通过第一放热冷水调节阀63、蒸发器641、冷水泵61、第二放热冷水调节阀65降温后进入储热罐1中；所述制冷循环为：制冷剂在蒸发器641吸收从热网循环泵5出口来的冷水热量蒸发并进入吸收器648中，制冷剂在吸收器648中被吸收剂吸收成为溶液，并放出部分热量，吸收器648中的稀溶液依次经过溶液泵647升压，回热加热器645升温后送入发生器中，发生器644吸收来自汽轮机供热抽汽中的热量，制冷剂蒸发送入冷凝器643中，而发生器644中浓溶液依次通过第二节流阀646、回热加热器645再送入吸收器648中；制冷剂在冷凝器643中冷凝放出热量后经过第一节流阀642降温降压后送入蒸发器641中完成循环。Heat release mode of heat storage tank: including heating network water circulation and refrigeration cycle; said heating network water circulation is: first exothermic hot water regulating valve 23, second exothermic hot water regulating valve 24, first exothermic cold water regulating valve 63 1. The second exothermic cold water regulating valve 65 and the regulating valve 7 are opened, and the heat storage hot water regulating valve 22 and the heat storage cold water regulating valve 62 are closed. , the condenser 643 and the absorber 648 jointly supply heat to the heat user 4; the hot water at the outlet of the heat network heater 3 is sent to the inlet of the heat user 4, and at the same time, the hot water in the heat storage tank 1 passes through the first exothermic hot water regulating valve 23. The hot water pump 21 and the second exothermic hot water regulating valve 24 are sent to the inlet of the heat user 4; the cold water at the outlet of the heat user 4 is sent to the inlet of the heat network heater 3 after passing through the heat network circulation pump 5, and the other part passes through the absorber in turn 648 and condenser 643 are heated and sent back to the heat user 4 inlet, and some of them pass through the first exothermic cold water regulating valve 63, evaporator 641, cold water pump 61, and the second exothermic cold water regulating valve 65 to cool down and then enter the heat storage tank 1; the refrigerating cycle is: the refrigerant absorbs the cold water heat from the outlet of the heat network circulation pump 5 in the evaporator 641 and evaporates and enters the absorber 648, and the refrigerant is absorbed by the absorbent in the absorber 648 to become a solution, and Part of the heat is released, the dilute solution in the absorber 648 is sequentially boosted by the solution pump 647, and then sent to the generator after the heat recovery heater 645 is heated up. into the condenser 643, while the concentrated solution in the generator 644 passes through the second throttling valve 646, the recuperation heater 645 and then into the absorber 648; The valve 642 lowers the temperature and pressure and sends it to the evaporator 641 to complete the cycle.
本发明具有以下优点和有益效果：The present invention has the following advantages and beneficial effects:
(1)本发明通过在储热罐冷水管道中增设一个吸收式热泵，在一定的储热量下，保持储热罐热水温度不变，降低储热罐冷水温度，扩大了储热罐冷热水温差，从而减小储热罐的水量，储热罐体积减小，减小了储热罐占地面积，进而降低投资成本。(1) In the present invention, an absorption heat pump is added to the cold water pipeline of the heat storage tank to keep the temperature of the hot water in the heat storage tank constant under a certain amount of stored heat, reduce the temperature of the cold water in the heat storage tank, and expand the capacity of the heat storage tank. Water temperature difference, thereby reducing the water volume of the heat storage tank, the volume of the heat storage tank is reduced, the area occupied by the heat storage tank is reduced, and the investment cost is reduced.
(2)本发明加入吸收式热泵，消耗了部分汽轮机抽汽，在一定主蒸汽流量下，降低了机组的发电功率，从而提升了热电联产机组的深度调峰性能，同时吸收式热泵也可用于加热热网回水。(2) The invention adds an absorption heat pump, which consumes part of the steam extraction of the steam turbine. Under a certain main steam flow rate, the power generation power of the unit is reduced, thereby improving the deep peak-shaving performance of the combined heat and power unit. At the same time, the absorption heat pump can also be used Return water to the heating network.
(3)本发明系统简单，操作简单。(3) The system of the present invention is simple and easy to operate.
附图说明Description of drawings
图1为本发明热电解耦系统结构示意图。Fig. 1 is a schematic structural diagram of the thermoelectric decoupling system of the present invention.
具体实施方式Detailed ways
下面结合附图对本发明作进一步详细说明。The present invention will be described in further detail below in conjunction with the accompanying drawings.
如图1所示，本发明一种储热罐耦合吸收式热泵的热电解耦系统，由储热罐1、热水水泵21、储热热水调节阀22、第一放热热水调节阀23、第二放热热水调节阀24、热网加热器3、热用户4、热网循环泵5、冷水水泵61、储热冷水调节阀62、第一放热冷水调节阀63、第二放热冷水调节阀65、蒸发器641、第一节流阀642、冷凝器643、发生器644、回热加热器645、第二节流阀646、溶液泵647、吸收器648和调节阀7组成；As shown in Figure 1, a thermoelectric decoupling system of a heat storage tank coupled with an absorption heat pump according to the present invention consists of a heat storage tank 1, a hot water pump 21, a heat storage hot water regulating valve 22, and a first exothermic hot water regulating valve 23. The second exothermic hot water regulating valve 24, the heat network heater 3, the heat user 4, the heat network circulation pump 5, the cold water pump 61, the heat storage cold water regulating valve 62, the first exothermic cold water regulating valve 63, the second Exothermic cold water regulating valve 65, evaporator 641, first throttle valve 642, condenser 643, generator 644, regenerative heater 645, second throttle valve 646, solution pump 647, absorber 648 and regulating valve 7 composition;
所述储热罐1热水管道通过储热热水调节阀22与热水水泵21出口相连，热水水泵21入口与热网加热器3热水出口相连，热网加热器3热水出口还与热用户4入口相连，热用户4出口通过热网循环泵5与热网加热器3冷水入口相连；热水泵21入口还与储热罐1热水管道通过第一放热热水调节阀23相连，热水水泵21出口还通过第二放热热水调节阀24与热用户4入口相连；储热罐1冷水管道与冷水水泵61入口连通，冷水水泵61出口通过储热冷水调节阀62与热网加热器3冷水入口相连，冷水泵61入口还通过蒸发器641、第一放热冷水调节阀63与热网循环泵5出口相连，冷水泵61出口还通过第二放热冷水调节阀65与储热罐1冷水管道相连；热网循环泵5出口还通过吸收器648、冷凝器643、调节阀7与热用户4入口相连；所述蒸发器641、吸收器648、发生器644、回热加热器645、溶液泵647、第一节流阀642、第二节流阀646组成吸收式热泵。蒸发器641制冷剂入口通过第一节流阀642与冷凝器643制冷剂出口相连，蒸发器641制冷剂出口通过管道与吸收器648制冷剂入口相连，吸收器648溶液入口通过第二节流阀646、回热加热器645与发生器644溶液出口相连，吸收器648稀溶液出口通过溶液泵647、回热加热器645与发生器644溶液入口相连，发生器644制冷剂出口与冷凝器643制冷剂入口相连。The hot water pipeline of the heat storage tank 1 is connected to the outlet of the hot water pump 21 through the heat storage hot water regulating valve 22, the inlet of the hot water pump 21 is connected to the hot water outlet of the heat network heater 3, and the hot water outlet of the heat network heater 3 is also It is connected with the heat user 4 inlet, and the heat user 4 outlet is connected with the heat network heater 3 cold water inlet through the heat network circulation pump 5; the hot water pump 21 inlet is also connected with the heat storage tank 1 hot water pipeline through the first exothermic hot water regulating valve 23 The outlet of the hot water pump 21 is also connected with the inlet of the heat user 4 through the second exothermic hot water regulating valve 24; the cold water pipe of the heat storage tank 1 is connected with the inlet of the cold water pump 61, and the outlet of the cold water pump 61 is connected with the heat storage cold water regulating valve 62. The cold water inlet of the heat network heater 3 is connected, the inlet of the cold water pump 61 is also connected with the outlet of the heat network circulation pump 5 through the evaporator 641 and the first exothermic cold water regulating valve 63, and the outlet of the cold water pump 61 is also passed through the second exothermic cold water regulating valve 65 It is connected with the cold water pipeline of heat storage tank 1; the outlet of heat network circulation pump 5 is also connected with the inlet of heat user 4 through absorber 648, condenser 643 and regulating valve 7; the evaporator 641, absorber 648, generator 644, return The heat heater 645, the solution pump 647, the first throttle valve 642, and the second throttle valve 646 form an absorption heat pump. The refrigerant inlet of the evaporator 641 is connected to the refrigerant outlet of the condenser 643 through the first throttle valve 642, the refrigerant outlet of the evaporator 641 is connected to the refrigerant inlet of the absorber 648 through a pipe, and the solution inlet of the absorber 648 is connected through the second throttle valve 646. The regenerative heater 645 is connected to the solution outlet of the generator 644, the outlet of the dilute solution of the absorber 648 is connected to the solution inlet of the generator 644 through the solution pump 647, and the regenerative heater 645 is connected to the solution inlet of the generator 644, and the refrigerant outlet of the generator 644 is refrigerated with the condenser 643 connected to the agent inlet.
作为本发明的优选实施方式，所述发生器644的驱动蒸汽为汽轮机的供热抽汽。As a preferred embodiment of the present invention, the driving steam of the generator 644 is the heating and extraction steam of the steam turbine.
本发明储热罐耦合吸收式热泵的热电解耦系统的运行方法，包括储热罐储热模式和储热罐放热模式，具体如下：The operation method of the thermoelectric decoupling system of the heat storage tank coupled with the absorption heat pump of the present invention includes the heat storage mode of the heat storage tank and the heat release mode of the heat storage tank, specifically as follows:
储热罐储热模式：储热热水调节阀22和储热冷水调节阀62打开，第一放热热水调节阀23、第二放热热水调节阀24、第一放热冷水调节阀63、第二放热冷水调节阀65和调节阀7关闭，此时，吸收式热泵不启动；冷水在热网加热器3加热后送入热用户4供热，热用户4出口冷水经过热网循环泵5输送至热网加热器3入口；同时热网加热器3出口一部分多余热水将由热水水泵21经过储热热水调节阀22输送至储热罐1储存，储热罐1下部冷水由冷水水泵61经储热冷水调节阀62输送至热网加热器3入口重新加热；Heat storage tank heat storage mode: heat storage hot water regulating valve 22 and heat storage cold water regulating valve 62 are opened, the first exothermic hot water regulating valve 23, the second exothermic hot water regulating valve 24, the first exothermic cold water regulating valve 63. The second exothermic cold water regulating valve 65 and regulating valve 7 are closed. At this time, the absorption heat pump does not start; the cold water is sent to the heat user 4 for heating after being heated by the heat network heater 3, and the cold water from the heat user 4 exits through the heat network Circulation pump 5 transports to the inlet of heat network heater 3; at the same time, part of the excess hot water at the outlet of heat network heater 3 will be transported by hot water pump 21 to heat storage tank 1 through heat storage hot water regulating valve 22 for storage, and the lower part of heat storage tank 1 is cold water The cold water pump 61 is transported to the inlet of the heating network heater 3 through the heat storage cold water regulating valve 62 for reheating;
储热罐放热模式：包括热网水循环和制冷循环；所述热网水循环为：第一放热热水调节阀23、第二放热热水调节阀24、第一放热冷水调节阀63、第二放热冷水调节阀65和调节阀7打开，储热热水调节阀22和储热冷水调节阀62关闭，此时，吸收式热泵启动，由热网加热器3、储热罐1、冷凝器643和吸收器648共同向热用户4供热；热网加热器3出口热水送入热用户4入口，同时，储热罐1中的热水通过第一放热热水调节阀23、热水泵21、第二放热热水调节阀24送入热用户4入口；热用户4出口冷水经热网循环泵5后一部分输送入热网加热器3入口，另一部分依次经过吸收器648和冷凝器643加热后送回热用户4入口，还有一部分依次通过第一放热冷水调节阀63、蒸发器641、冷水泵61、第二放热冷水调节阀65降温后进入储热罐1中；所述制冷循环为：制冷剂在蒸发器641吸收从热网循环泵5出口来的冷水热量蒸发并进入吸收器648中，制冷剂在吸收器648中被吸收剂吸收成为溶液，并放出部分热量，吸收器648中的稀溶液依次经过溶液泵647升压，回热加热器645升温后送入发生器中，发生器644吸收来自汽轮机供热抽汽中的热量，制冷剂蒸发送入冷凝器643中，而发生器644中浓溶液依次通过第二节流阀646、回热加热器645再送入吸收器648中；制冷剂在冷凝器643中冷凝放出热量后经过第一节流阀642降温降压后送入蒸发器641中完成循环。Heat release mode of heat storage tank: including heating network water circulation and refrigeration cycle; said heating network water circulation is: first exothermic hot water regulating valve 23, second exothermic hot water regulating valve 24, first exothermic cold water regulating valve 63 1. The second exothermic cold water regulating valve 65 and the regulating valve 7 are opened, and the heat storage hot water regulating valve 22 and the heat storage cold water regulating valve 62 are closed. , the condenser 643 and the absorber 648 jointly supply heat to the heat user 4; the hot water at the outlet of the heat network heater 3 is sent to the inlet of the heat user 4, and at the same time, the hot water in the heat storage tank 1 passes through the first exothermic hot water regulating valve 23. The hot water pump 21 and the second exothermic hot water regulating valve 24 are sent to the inlet of the heat user 4; the cold water at the outlet of the heat user 4 is sent to the inlet of the heat network heater 3 after passing through the heat network circulation pump 5, and the other part passes through the absorber in turn 648 and condenser 643 are heated and sent back to the heat user 4 inlet, and some of them pass through the first exothermic cold water regulating valve 63, evaporator 641, cold water pump 61, and the second exothermic cold water regulating valve 65 to cool down and then enter the heat storage tank 1; the refrigerating cycle is: the refrigerant absorbs the cold water heat from the outlet of the heat network circulation pump 5 in the evaporator 641 and evaporates and enters the absorber 648, and the refrigerant is absorbed by the absorbent in the absorber 648 to become a solution, and Part of the heat is released, the dilute solution in the absorber 648 is sequentially boosted by the solution pump 647, and then sent to the generator after the heat recovery heater 645 is heated up. into the condenser 643, while the concentrated solution in the generator 644 passes through the second throttling valve 646, the recuperation heater 645 and then into the absorber 648; The valve 642 lowers the temperature and pressure and sends it to the evaporator 641 to complete the cycle.
以上内容是结合具体的优选实施方式对本发明所作的进一步详细说明，不能认定本发明的具体实施方式仅限于此，对于本发明所属技术领域的普通技术人员来说，在不脱离本发明构思的前提下，还可以做出若干简单的推演或替换，都应当视为属于本发明由所提交的权利要求书确定专利保护范围。The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments. It cannot be determined that the specific embodiments of the present invention are limited thereto. Under the present invention, some simple deduction or replacement can also be made, all of which should be regarded as belonging to the scope of patent protection determined by the submitted claims of the present invention.
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| CN114963153A (en) * | 2022-05-10 | 2022-08-30 | 三河发电有限责任公司 | Combined heat and power unit and its control method |
| CN115264987A (en) * | 2022-07-29 | 2022-11-01 | 西安交通大学 | A calcium chloride absorption heat pump heat storage system and operation method |
| CN115264987B (en) * | 2022-07-29 | 2023-08-15 | 西安交通大学 | Calcium chloride absorption heat pump heat storage system and operation method |
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