WO2024183152A1 - 储热供热系统 - Google Patents

储热供热系统 Download PDF

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Publication number
WO2024183152A1
WO2024183152A1 PCT/CN2023/093942 CN2023093942W WO2024183152A1 WO 2024183152 A1 WO2024183152 A1 WO 2024183152A1 CN 2023093942 W CN2023093942 W CN 2023093942W WO 2024183152 A1 WO2024183152 A1 WO 2024183152A1
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WO
WIPO (PCT)
Prior art keywords
heat storage
heat
outlet
storage tank
switch valve
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2023/093942
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English (en)
French (fr)
Inventor
鲁晓宇
周科
李明皓
白永岗
王志超
成汭珅
何天逸
杜南京
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Xian Thermal Power Research Institute Co Ltd
Original Assignee
Xian Thermal Power Research Institute Co Ltd
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Filing date
Publication date
Application filed by Xian Thermal Power Research Institute Co Ltd filed Critical Xian Thermal Power Research Institute Co Ltd
Publication of WO2024183152A1 publication Critical patent/WO2024183152A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B1/00—Methods of steam generation characterised by form of heating method
    • F22B1/02—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers
    • F22B1/028—Steam generation using heat accumulators
    • 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
    • F01K17/02—Using steam or condensate extracted or exhausted from steam engine plant for heating purposes, e.g. industrial, domestic
    • 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
    • F24D11/002—Central heating systems using heat accumulated in storage masses water heating system
    • 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
    • F24D18/00—Small-scale combined heat and power [CHP] generation systems specially adapted for domestic heating, space heating or domestic hot-water supply
    • 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
    • F24D19/1012—Arrangement or mounting of control or safety devices for water heating systems for central heating by regulating the speed of a pump
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D20/00—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00
    • 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
    • F24D2101/00—Electric generators of small-scale CHP systems
    • F24D2101/10—Gas turbines; Steam engines or steam turbines; Water turbines, e.g. located in water pipes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D20/00—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00
    • F28D2020/0065—Details, e.g. particular heat storage tanks, auxiliary members within tanks
    • F28D2020/0082—Multiple tanks arrangements, e.g. adjacent tanks, tank in tank
    • 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
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/14—Thermal energy storage

Definitions

  • the present disclosure relates to the field of energy storage technology, and in particular to a heat storage heating system.
  • deep peak regulation of thermal power units mostly adopts electric heating energy storage system for peak regulation, that is, the thermal power plant converts the excess electricity during the day into heat energy through the electrode boiler, and stores the heat energy in the form of high-temperature water in the hot water storage tank.
  • the thermal power plant converts the excess electricity during the day into heat energy through the electrode boiler, and stores the heat energy in the form of high-temperature water in the hot water storage tank.
  • the heat energy of the high-temperature water is added to the heating to achieve flexible peak regulation of the thermal power plant. Since heating is seasonal, it is difficult to achieve deep peak regulation throughout the year, and the energy conversion process of converting heat energy into electricity and then electricity into heat energy reduces the energy conversion efficiency.
  • the present disclosure aims to solve one of the technical problems in the related art at least to a certain extent.
  • the embodiments of the present disclosure propose a heat storage heating system, which can perform year-round peak load regulation for thermal power plants and improve energy conversion efficiency.
  • the heat storage heating system of the embodiment of the present disclosure includes: a heat storage unit, the heat storage unit includes a heat storage tank and a first heat exchanger, one end of the first heat exchanger is suitable for communicating with a steam source, the other end of the first heat exchanger is connected to the heat storage tank, and the first heat exchanger uses the heat of the steam source to perform heat exchange on the heat storage medium;
  • a second heat exchanger one end of which is suitable for being connected to the first pipeline, the other end of which is connected to the heat storage unit, and the second heat exchanger uses the stored heat in the heat storage unit to perform heat exchange on the heat supply medium in the first pipeline;
  • the heat storage tank comprises a first heat storage tank and a second heat storage tank, a heat storage medium is stored in the first heat storage tank and/or the second heat storage tank, and the heat storage medium can flow between the first heat storage tank and the second heat storage tank;
  • One end of the first heat exchanger is suitable for being connected to a first steam outlet of a steam turbine or a second steam outlet of the steam turbine, the first steam outlet is an exhaust port of a high-pressure cylinder of the steam turbine, and the second steam outlet is an exhaust port of an intermediate stage of the steam turbine, and the other end of the first heat exchanger is respectively connected to the first heat storage tank and the second heat storage tank, and the first heat exchanger utilizes the heat in the steam extracted from the first steam outlet or the second steam outlet of the steam turbine to perform heat exchange on the heat storage medium in the first heat storage tank, and the heat storage medium after the heat exchange flows to the second heat storage tank.
  • the heat storage heating system of the disclosed embodiment can perform year-round peak regulation for thermal power plants and improve energy conversion efficiency.
  • the first heat exchanger has a first inlet and a first outlet, the first inlet is connected to the first heat storage tank, and the first outlet is connected to the second heat storage tank.
  • the heat storage unit further includes a first switch valve and a first pump, wherein the first switch valve is connected to the first pump, the first switch valve is connected to the first inlet, and the first pump is connected to the first heat storage tank.
  • the first heat exchanger has a second inlet and a second outlet, the second inlet is in communication with the steam source, and the second outlet is adapted to be in communication with an outlet of a condensate pump of a boiler.
  • the heat storage unit further includes a second switch valve and a first regulating valve, the second switch valve is connected to the first regulating valve, the second switch valve is connected to the steam source, and the first regulating valve is connected to the second inlet.
  • the heat storage unit further includes a third switch valve and a second pump, the third switch valve is connected to the second pump, the second pump is connected to the second outlet, and the third switch valve is connected to the outlet of the condensate pump.
  • the heat storage and heating system further includes a fourth switch valve, one end of the fourth switch valve is connected to the second heat exchanger, and the other end of the fourth switch valve is connected to the second heat storage tank.
  • the heat storage heating system further includes a third pump, one end of the third pump is connected to the fourth switch valve, and the other end of the third pump is connected to the second heat storage tank.
  • the second heat exchanger has a third inlet and a third outlet, the third inlet is suitable for communicating with the outlet of the feed water pump in the first pipeline, and the third outlet is suitable for connecting with the heater in the first pipeline.
  • the heat storage heating system further includes a fifth switch valve, one end of the fifth switch valve is connected to the outlet of the water feed pump, and the other end of the fifth switch valve is connected to the third inlet.
  • FIG. 1 is a schematic diagram of a heat storage heating system according to an embodiment of the present disclosure.
  • the first heat exchanger 2 has a first inlet 21, a first
  • Steam source 3 first switch valve 4, first switch valve inlet 41, first switch valve outlet 42, a first pump 5, a first pump inlet 51, a first pump outlet 52, The second switch valve 6, the second switch valve inlet 61, the second switch valve outlet 62, The first regulating valve 7, the first regulating valve inlet 71, the first regulating valve outlet 72, The third switch valve 8, the third switch valve inlet 81, the third switch valve outlet 82,
  • the second pump 9 has a second pump inlet 91 and a second pump outlet 92 .
  • the heat storage and heating system of the embodiment of the present disclosure includes a heat storage unit 100 and a second heat exchanger 200.
  • the heat storage unit 100 includes a heat storage tank 1 and a first heat exchanger 2.
  • One end of the first heat exchanger 2 is suitable for communicating with a steam source 3, and the other end of the first heat exchanger 2 is connected to the heat storage tank 1.
  • the first heat exchanger 2 uses the heat of the steam source 3 to perform heat exchange on the heat storage medium 11.
  • One end of the second heat exchanger 200 is suitable for connecting to a first pipeline 300, and the other end of the second heat exchanger 200 is connected to the heat storage unit 100.
  • the second heat exchanger 200 uses the stored heat in the heat storage unit 100 to perform heat exchange on the heating medium in the first pipeline 300.
  • the heat storage tank 1 includes a first heat storage tank 12 and a second heat storage tank 13.
  • the first heat storage tank 12 and/or the second heat storage tank 13 store a heat storage medium 11, and the heat storage medium 11 can flow between the first heat storage tank 12 and the second heat storage tank 13;
  • one end of the first heat exchanger 2 is suitable for being connected to the first steam outlet of the steam turbine or the second steam outlet of the steam turbine, the first steam outlet is the exhaust port of the high-pressure cylinder of the steam turbine, and the second steam outlet is the intermediate stage exhaust port of the steam turbine, and the other end of the first heat exchanger 2 is respectively connected to the first heat storage tank 12 and the second heat storage tank 13, and the first heat exchanger 2 uses the heat in the steam extracted from the first steam outlet or the second steam outlet of the steam turbine to perform heat exchange on the heat storage medium 11 in the first heat storage tank 12, and the heat storage medium 11 after heat exchange flows to the second heat storage tank 13.
  • the steam source 3 is disposed on the left side of the first heat exchanger 2, and the steam source 3 is connected to the first heat exchanger 2 through a pipeline to transfer the steam in the steam source 3 to the first heat exchanger 2.
  • the heat storage tank 1 is disposed on the right side of the first heat exchanger 2, and the heat storage medium 11 in the heat storage tank 1 can store and release heat.
  • the heat storage tank 1 is connected to the first heat exchanger 2 so that the heat storage medium 11 can flow out of the heat storage tank 1, pass through the first heat exchanger 2 for heat exchange, and then flow back into the heat storage tank 1.
  • the second heat exchanger 200 is connected to the first pipeline 300 to transfer water or steam in the first pipeline 300 to the second heat exchanger 200 for heating
  • the heat storage tank 1 is connected to the second heat exchanger 200 to transfer the heat storage tank 1 to the second heat exchanger 200.
  • 1 is transferred to the second heat exchanger 200 for heat exchange, that is, the water and/or steam in the first pipeline 300 is transferred to the second heat exchanger 200 to exchange heat with the heat in the heat storage medium 11 in the heat storage tank 1, and the water and/or steam in the first pipeline 300 absorbs the heat in the heat storage medium 11 and the temperature rises, thereby heating the water and/or steam in the first pipeline 300.
  • the first heat storage tank 12 is arranged above the second heat storage tank 13.
  • the first heat storage tank 12 is used to store the heat storage medium 11 after releasing heat, that is, the low-temperature heat storage medium 11, and the second heat storage tank 13 is used to store the heat storage medium 11 after absorbing heat, that is, the heated heat storage medium 11.
  • the heat storage medium 11 in the heat storage tank 1 is heated, the heat storage medium 11 in the first heat storage tank 12 flows through the first heat exchanger 2, and exchanges heat with the hot steam transmitted to the first heat exchanger 2 by the steam source 3 in the first heat exchanger 2, and then the heat storage medium 11 flows back to the second heat storage tank 13, completing the heating of the heat storage medium 11 in the heat storage tank 1.
  • the steam source 3 can be extracted cold re-steam or steam turbine extraction.
  • the first heat exchanger 2 and the energy storage tank are arranged to achieve direct peak-shaving of the thermal power plant without seasonal restrictions.
  • the thermal power plant converts thermal energy into electrical energy, and then converts excess electrical energy into thermal energy for storage and peak-shaving
  • the embodiment of the present disclosure directly extracts high-temperature steam from the steam turbine or cold re-steam, and directly stores the heat in the high-temperature steam, thereby reducing the loss in the energy conversion process and thus improving the energy conversion efficiency.
  • the heat storage medium 11 uses heat transfer oil.
  • High-temperature heat transfer oil can obtain a very high heat transfer medium temperature to achieve heat transfer, and the heat transfer oil system can obtain a very high heat transfer medium operating temperature under normal pressure conditions, reducing the maintenance work of equipment and pipelines.
  • the use of heat transfer oil can transfer heat under normal pressure, improving the safety performance of the heat storage unit 100.
  • the freezing point of heat transfer oil is lower and the low-temperature operation performance is good, which can reduce the minimum operating temperature of the heat storage medium 11 and avoid freezing of the heat storage medium 11.
  • high-temperature steam is directly extracted from the cold re-steam or steam turbine, and the high-temperature steam is transmitted to the first heat exchanger 2 to provide heat for the low-temperature heat storage medium 11 for heat exchange, that is, the thermal energy of the steam extracted from the cold re-steam or steam turbine is stored through the heat storage medium 11, and steam heat storage is directly used, which reduces the energy conversion process and improves the energy conversion efficiency.
  • the heat storage unit 100 directly participates in the peak regulation of the thermal power plant to meet the peak regulation demand of the thermal power plant.
  • the first heat exchanger 2 has a first inlet 21 and a first outlet 22 , the first inlet 21 is connected to the first heat storage tank 12 , and the first outlet 22 is connected to the second heat storage tank 13 .
  • the first heat storage tank 12 has a first heat storage tank outlet 122
  • the second heat storage tank 13 has a second heat storage tank inlet 131.
  • the first inlet 21 of the first heat exchanger 2 is connected to the first heat storage tank outlet 122 to transfer the low-temperature heat storage medium 11 stored in the first heat storage tank 12 to the first heat exchanger 2.
  • the low-temperature heat storage medium 11 absorbs heat in the first heat exchanger 2 to become the heated heat storage medium 11.
  • the first outlet 22 is connected to the second heat storage tank inlet 131 to transfer the heated heat storage medium 11 to the second heat storage tank 13 for heat storage.
  • the heat storage unit 100 further includes a first switch valve 4 and a first pump 5 , the first switch valve 4 is connected to the first pump 5 , the first switch valve 4 is connected to the first inlet 21 , and the first pump 5 is connected to the first heat storage tank 12 .
  • the first switch valve 4 has a first switch valve inlet 41 and a first switch valve outlet 42
  • the first pump 5 has a first pump inlet 51 and a first pump outlet 52
  • the first pump inlet 51 is connected to the first heat storage tank outlet 122
  • the first pump outlet 52 is connected to the first switch valve inlet 41
  • the first switch valve outlet 42 is connected to the first inlet 21, so that the heat storage medium 11 stored in the first heat storage tank 12 is sequentially transferred to the first heat exchanger 2 through the first pump 5 and the first switch valve 4 for heat exchange.
  • the setting of the first switch valve 4 can realize the opening and closing between the first heat storage tank 12 and the first heat exchanger 2.
  • the setting of the first pump 5 can adjust the speed and flow rate of the heat storage medium 11 in the first heat storage tank 12 transmitted to the first heat exchanger 2.
  • the embodiment of the present disclosure can adjust the pumping speed of the first pump 5 according to the temperature of the steam source 3.
  • the first heat exchanger 2 has a second inlet 23 and a second outlet 24 , the second inlet 23 is in communication with the steam source 3 , and the second outlet 24 is adapted to be in communication with an outlet of the condensate pump 310 of the boiler 700 .
  • the second inlet 23 is connected to the steam source 3 to transfer the high-temperature steam of the steam source 3 to the first heat exchanger 2.
  • the high-temperature steam is converted into condensed water after heat exchange with the heat storage medium 11 in the first heat exchanger 2.
  • the second outlet 24 is connected to the outlet of the condensate pump 310 of the boiler 700 to transfer the condensed water to the outlet of the condensate pump 310, thereby realizing the reuse of the condensed water.
  • the heat storage unit 100 further includes a second switch valve 6 and a first regulating valve 7 , the second switch valve 6 is connected to the first regulating valve 7 , the second switch valve 6 is connected to the steam source 3 , and the first regulating valve 7 is connected to the second inlet 23 .
  • the second switch valve 6 has a second switch valve inlet 61 and a second switch valve outlet 62
  • the first regulating valve 7 has a first regulating valve inlet 71 and a first regulating valve outlet 72
  • the second switch valve inlet 61 is connected to the steam source 3
  • the second switch valve outlet 62 is connected to the first regulating valve inlet 71
  • the first regulating valve outlet 72 is connected to the second inlet 23, so as to transmit the high-temperature steam in the steam source 3 to the first heat exchanger 2 through the second switch valve 6 and the first regulating valve 7 in sequence.
  • the embodiment of the present disclosure directly stores heat in the steam, and during the transmission process of the steam pipeline, if only the first regulating valve 7 is set, it is impossible to ensure the complete closure of the steam pipeline, that is, the first regulating valve 7 cannot close the steam pipeline tightly.
  • the embodiment of the present disclosure controls the opening and closing of the steam source 3 by setting the second switch valve 6, and adjusts the amount of steam transmitted from the steam source 3 to the first heat exchanger 2 by setting the first regulating valve 7.
  • the amount of high-temperature steam transmitted to the first heat exchanger 2 is adjusted by the first regulating valve 7, and the heat storage medium 11 transmitted to the first heat exchanger 2 is adjusted by the first pump 5, so as to increase the amount of the heat storage medium 11 to match the amount of high-temperature steam, directly store the heat in the steam, and improve the heat storage efficiency of the heat storage unit 100.
  • the heat storage unit 100 further includes a third switch valve 8 and a second pump 9 , the third switch valve 8 is connected to the second pump 9 , the second pump 9 is connected to the second outlet 24 , and the third switch valve 8 is connected to the outlet of the condensate pump 310 .
  • the third switch valve 8 has a third switch valve inlet 81 and a third switch valve outlet 82
  • the second pump 9 has a second pump inlet 91 and a second pump outlet 92
  • the second pump inlet 91 is connected to the second outlet 24
  • the second pump outlet 92 is connected to the third switch valve inlet 81
  • the third development valve outlet is connected to the outlet of the condensate pump 310 to transfer the condensate after heat exchange in the first heat exchanger 2 to the outlet of the condensate pump 310.
  • the condensed water in the first heat exchanger 2 is sequentially transmitted to the outlet of the condensate pump 310 through the second pump 9 and the third switch valve 8, so that the condensed water converted after storing the heat of the high-temperature steam is connected with the condensed water at the outlet of the condensate pump 310, thereby realizing the recycling of the condensed water.
  • the disclosed embodiment participates in deep peak regulation by extracting steam from the unit to do less work with the steam turbine. After the peak regulation is completed, the condensate is heated by utilizing the heat stored in the heat storage medium 11, thereby reducing the extraction volume, thereby improving the work capacity of the thermal power unit.
  • the heat storage heating system further includes a fourth switch valve 400 , one end of the fourth switch valve 400 is connected to the second heat exchanger 200 , and the other end of the fourth switch valve 400 is connected to the second heat storage tank 13 .
  • the heat storage heating system further includes a third pump 500 , one end of the third pump 500 is connected to the fourth switch valve 400 , and the other end of the third pump 500 is connected to the second heat storage tank 13 .
  • the fourth switch valve 400 has a fourth switch valve inlet 410 and a fourth switch valve outlet 420
  • the third pump 500 has a third pump inlet 510 and a third pump outlet 520
  • the second heat storage tank 13 has a second heat storage tank outlet 132
  • the first heat storage tank 12 has a first heat storage tank inlet 121
  • the second heat exchanger 200 has a fourth inlet 230 and a fourth outlet 240
  • the third pump inlet 510 is communicated with the second heat storage tank outlet 132
  • the third pump outlet 520 is communicated with the fourth switch valve inlet 410
  • the fourth switch valve outlet 420 is communicated with the fourth inlet 230 to transfer the high-temperature heat storage medium 11 in the second heat storage tank 13 to the second heat exchanger 200
  • the high-temperature heat storage medium 11 is transferred to the first heat storage tank inlet 121 through the fourth outlet 240 after heat release in the second heat exchanger 200, thereby completing the heat release of the heat storage medium 11 in the second heat storage tank 13.
  • the second heat exchanger 200 has a third inlet 210 and a third outlet 220 .
  • the third inlet 210 is adapted to communicate with the outlet of the feed water pump 320 in the first pipeline 300
  • the third outlet 220 is adapted to connect with the heater 330 in the first pipeline 300 .
  • the third inlet 210 is connected to the outlet of the water pump 320 in the first pipeline 300, and the third outlet 220 is connected to the heater 330 to transfer the water and/or steam in the first pipeline 300 to the second heat exchanger 200. After heat exchange with the heat storage medium 11 in the second heat storage tank 13 , the heat is transmitted to the outlet of the heater 330 of the first pipeline 300 , thereby reducing the power consumption of the heater 330 .
  • the heat storage heating system further includes a fifth switch valve 600 , one end of the fifth switch valve 600 is connected to the outlet of the water supply pump 320 , and the other end of the fifth switch valve 600 is connected to the third inlet 210 .
  • the fifth valve has a fifth valve inlet 610 and a fifth valve outlet 620, the fifth valve inlet 610 is connected to the outlet of the feed water pump 320, and the fifth valve outlet 620 is connected to the third inlet 210 to transfer water and/or steam in the feed water pump 320 to the second heat exchanger 200 for heat exchange.
  • a deaerator 340 is also provided on the first pipeline 300, and the heater 330 includes a first heater 3310, a second heater 3320, a third heater 3330, a fourth heater 3340, a fifth heater 3350 and a sixth heater 3360, wherein the first heater 3310, the second heater 3320 and the third heater 3330 are low-pressure heaters 330, and the fourth heater 3340, the fifth heater 3350 and the sixth heater 3360 are high-pressure heaters 330.
  • the arrangement of the multiple heaters 330 matches the thermal system of the power plant to achieve layer-by-layer heating.
  • the condensate flowing out from the outlet of the condensate pump 310 is heated by the first heater 3310, the second heater 3320 and the third heater 3330 in sequence and then enters the deaerator 340 for deoxygenation.
  • the deoxygenated water and/or steam passes through the feed water pump 320 and is heated layer by layer by the fourth heater 3340, the fifth heater 3350 and the sixth heater 3360 in sequence.
  • the steam heated by the sixth heater 3360 is transmitted to the boiler 700.
  • the heater 330 is heated layer by layer by extracting air from the steam turbine, and the temperature of each stage is different.
  • the embodiment of the present disclosure extracts water and/or steam at the outlet of the feed water pump 320 into the second heat exchanger 200 for heating, and transmits the heated water and/or steam to the outlet of the fifth heater 3350, so that the temperature of the heat storage medium 11 matches the temperature of the water and/or steam at the outlet of the feed water pump 320 and the temperature at the outlet of the fifth heater 3350, thereby reducing the temperature difference, improving the heat release efficiency of the heat storage medium 11, and thereby improving the heating efficiency of the heat storage heating system.
  • the high-temperature heat storage medium 11 stored in the second heat storage tank 13 enters the second heat exchanger 200 through the third pump 500 and the fourth switch valve 400 to release heat, and part of the water and/or steam introduced at the outlet of the feed water pump 320 in the first pipeline 300 enters the second heat exchanger 200 through the fifth switch valve 600 to absorb heat.
  • the high-temperature heat storage medium 11 releases heat in the second heat exchanger 200, it is transmitted to the first heat storage tank 12 through the fourth outlet 240, and the water and/or steam after absorbing heat is transmitted to the outlet of the heater 330 through the third outlet 220.
  • the high-temperature heat storage medium 11 in the second heat storage tank 13 heats the feed water temperature in the first pipeline 300, that is, the heat storage heating boiler 700, so that the heating power of the heater 330 can be reduced, that is, the extraction amount of the heater 330 is reduced, and the work of the unit is increased.
  • first and second are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated.
  • a feature defined as “first” or “second” may explicitly or implicitly include at least one of the features.
  • “plurality” means at least two, such as two, three, etc., unless otherwise clearly and specifically defined.
  • the terms “installed”, “connected”, “connected”, “fixed” and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined.
  • installed installed”, “connected”, “connected”, “fixed” and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined.
  • the specific meanings of the above terms in the present disclosure can be understood according to specific circumstances.
  • a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium.
  • a first feature being “above”, “above” and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature.
  • a first feature being “below”, “below” and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.
  • the terms “one embodiment”, “some embodiments”, “examples”, “specific examples”, or “some examples” and the like mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present disclosure.
  • the schematic representations of the above terms do not necessarily refer to the same embodiment or example.
  • the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner.
  • those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

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Abstract

一种储热供热系统，所述储热供热系统包括储热单元（100）和第二换热器（200），储热单元（100）包括储热罐（1）和第一换热器（2），第一换热器（2）的一端适于与蒸汽源（3）连通，第一换热器（2）的另一端与储热罐（1）相连，第一换热器（2）利用蒸汽源（3）的热量对储热介质进行热交换，第二换热器（200）的一端适于与第一管路（300）相连，第二换热器（200）的另一端与储热单元（100）相连，第二换热器（200）利用储热单元（100）内的存储热量对第一管路（300）内的供热介质进行热交换。

Description

储热供热系统
相关申请的交叉引用
本申请要求在2023年03月09日在中国提交的中国专利申请号2023102270019的优先权，其全部内容通过引用并入本文。
技术领域
本公开涉及储能技术领域，具体涉及一种储热供热系统。
背景技术
相关技术中，火电机组的深度调峰多采用电加热储能系统进行调峰，即热电厂将白天的过剩电能通过电极锅炉将电能转化成热能，并将热能以高温水的形式存储到储热水罐中，在夜间供电负荷小而供热需求大时，将高温水的热能补充到供热中，实现热电厂的灵活调峰。由于供暖具有季节性，难以实现全年的深度调峰，而且热能转变成电能，电能再转变成热能的能量转换过程，降低了能量转换效率。
发明内容
本公开旨在至少在一定程度上解决相关技术中的技术问题之一。为此，本公开的实施例提出了一种储热供热系统，可以对热电厂进行全年调峰，提高能量转换效率。
本公开实施例的储热供热系统包括：储热单元，所述储热单元包括储热罐和第一换热器，所述第一换热器的一端适于与蒸汽源连通，所述第一换热器的另一端与所述储热罐相连，所述第一换热器利用所述蒸汽源的热量对所述储热介质进行热交换；
第二换热器，所述第二换热器的一端适于与第一管路相连，所述第二换热器的另一端与所述储热单元相连，所述第二换热器利用所述储热单元内的存储热量对所述第一管路内的供热介质进行热交换；
其中，所述储热罐包括第一储热罐和第二储热罐，所述第一储热罐和/或所述第二储热罐内存储有储热介质，所述储热介质可在所述第一储热罐和所述第二储热罐之间流通；
所述第一换热器的一端适于与汽轮机的第一蒸汽出口或汽轮机的第二蒸汽出口相连，所述第一蒸汽出口为汽轮机高压缸的排汽口，所述第二蒸汽出口为汽轮机的中间级排汽口，所述第一换热器的另一端分别与所述第一储热罐和所述第二储热罐相连，所述第一换热器利用从所述汽轮机的第一蒸汽出口或第二蒸汽出口抽取的蒸汽中的热量对所述第一储热罐内的储热介质进行热交换，经热交换后的储热介质流通至第二储热罐。
本公开实施例的储热供热系统，可以对热电厂进行全年调峰，提高能量转换效率。
在一些实施例中，所述第一换热器具有第一进口和第一出口，所述第一进口与所述第一储热罐相连，所述第一出口与所述第二储热罐相连。
在一些实施例中，所述储热单元还包括第一开关阀和第一泵，所述第一开关阀与所述第一泵相连，所述第一开关阀与所述第一进口相连，所述第一泵与所述第一储热罐相连。
在一些实施例中，所述第一换热器具有第二进口和第二出口，所述第二进口与所述蒸汽源连通，所述第二出口适于与锅炉的凝结水泵的出口连通。
在一些实施例中，所述储热单元还包括第二开关阀和第一调节阀，所述第二开关阀与所述第一调节阀相连，所述第二开关阀与所述蒸汽源连通，所述第一调节阀与所述第二进口连通。
在一些实施例中，所述储热单元还包括第三开关阀和第二泵，所述第三开关阀与所述第二泵相连，所述第二泵与所述第二出口连通，所述第三开关阀与所述凝结水泵的出口连通。
在一些实施例中，所述储热供热系统还包括第四开关阀，所述第四开关阀的一端与所述第二换热器相连，所述第四开关阀的另一端与所述第二储热罐相连。
在一些实施例中，所述储热供热系统还包括第三泵，所述第三泵的一端与所述第四开关阀相连，所述第三泵的另一端与所述第二储热罐相连。
在一些实施例中，所述第二换热器具有第三进口和第三出口，所述第三进口适于与所述第一管路中的给水泵的出口连通，所述第三出口适于与所述第一管路中的加热器相连。
在一些实施例中，所述储热供热系统还包括第五开关阀，所述第五开关阀的一端与所述给水泵的出口连通，所述第五开关阀的另一端与所述第三进口连通。
附图说明
图1是本公开实施例的储热供热系统的示意图。
附图标记：
储热单元100，
第二换热器200，第三进口210，第三出口220，第四进口230，第四出口240，第一
管路300，凝结水泵310，给水泵320，加热器330，第一加热器3310，第二加热器3320，第三加热器3330，第四加热器3340，第五加热器3350，第六加热器3360，除氧器340，
第四开关阀400，第四开关阀进口410，第四开关阀出口420，
第三泵500，第三泵进口510，第三泵出口520，
第五开关阀600，第五阀门进口610，第五阀门出口620，锅炉700，
储热罐1，储热介质11，第一储热罐12，第一储热罐进口121，第一储热罐出口122，
第二储热罐13，第二储热罐进口131，第二储热罐出口132，
第一换热器2，第一进口21，第一出口22，第二进口23，第二出口24，
蒸汽源3，第一开关阀4，第一开关阀进口41，第一开关阀出口42，
第一泵5，第一泵进口51，第一泵出口52，
第二开关阀6，第二开关阀进口61，第二开关阀出口62，
第一调节阀7，第一调节阀进口71，第一调节阀出口72，
第三开关阀8，第三开关阀进口81，第三开关阀出口82，
第二泵9，第二泵进口91，第二泵出口92。
具体实施方式
下面详细描述本公开的实施例，所述实施例的示例在附图中示出。下面通过参考附图描述的实施例是示例性的，旨在用于解释本公开，而不能理解为对本公开的限制。
如图1所示，本公开实施例储热供热系统包括储热单元100和第二换热器200，储热单元100包括储热罐1和第一换热器2，第一换热器2的一端适于与蒸汽源3连通，第一换热器2的另一端与储热罐1相连，第一换热器2利用蒸汽源3的热量对储热介质11进行热交换；第二换热器200的一端适于与第一管路300相连，第二换热器200的另一端与储热单元100相连，第二换热器200利用储热单元100内的存储热量对第一管路300内的供热介质进行热交换。储热罐1包括第一储热罐12和第二储热罐13，第一储热罐12和/或第二储热罐13内存储有储热介质11，储热介质11可在第一储热罐12和第二储热罐13之间流通；第一换热器2的一端适于与汽轮机的第一蒸汽出口或汽轮机的第二蒸汽出口相连，第一蒸汽出口为汽轮机高压缸的排汽口，第二蒸汽出口为汽轮机的中间级排汽口，第一换热器2的另一端分别与第一储热罐12和第二储热罐13相连，第一换热器2利用从汽轮机的第一蒸汽出口或第二蒸汽出口抽取的蒸汽中的热量对第一储热罐12内的储热介质11进行热交换，经热交换后的储热介质11流通至第二储热罐13。
在一些具体实施例中，蒸汽源3设在第一换热器2的左侧，蒸汽源3通过管道与第一换热器2相连以将蒸汽源3内的蒸汽传输至第一换热器2。储热罐1设在第一换热器2的右侧，储热罐1内的储热介质11可以进行热量的存储和释放，储热罐1与第一换热器2相连以使储热介质11可以从储热罐1内流出经过第一换热器2进行热交换后再流回储热罐1内。
在一些具体实施例中，第二换热器200与第一管路300相连以将第一管路300中的水或蒸汽传输至第二换热器200内进行加热，储热罐1与第二换热器200的相连以将储热罐 1内的储热介质11传输至第二换热器200内进行热交换，即第一管路300内的水和/或蒸汽传输至第二换热器200内与储热罐1内的储热介质11中的热量进行热交换，第一管路300内的水和/或蒸汽吸收储热介质11中的热量后温度升高，实现对第一管路300内的水和/或蒸汽加热。
第一储热罐12设在第二储热罐13的上方，第一储热罐12用以存储释放热量后的储热介质11，即低温储热介质11，第二储热罐13用以存储吸收热量后的储热介质11，即加热后的储热介质11。当对储热罐1中的储热介质11进行加热时，第一储热罐12内的储热介质11流经第一换热器2，并在第一换热器2内与蒸汽源3传输至第一换热器2内的热蒸汽发生热交换后储热介质11流回第二储热罐13中，完成储热罐1内的储热介质11的加热。
需要说明的是，蒸汽源3可以为抽取冷再蒸汽或汽轮机抽汽，本公开实施例中通过对汽轮机或冷再蒸汽的直接抽取，通过第一换热器2和储能罐的设置可以实现对火电厂的直接调峰，而且没有季节的限制，相比相关技术中火电厂将热能转变成电能，再将多余电能转变为热能进行存储调峰的方式，本公开实施例通过直接抽取汽轮机或冷再蒸汽中的高温蒸汽，直接对高温蒸汽中的热量进行存储，降低了能量转换过程中的损耗，进而提高能量转换效率。
例如，储热介质11选用导热油，高温导热油可以获得很高的传热介质温度，实现热量的传递，而且导热油系统在常压条件下可以获得很高的传热介质操作温度，减少了设备和管线的维护工作，相比水储热来说，选用导热油可以在常压环境下进行热量传递，提高了储热单元100安全性能，相比熔盐储热来说，导热油的凝固点较低，低温运行性能好，可以降低储热介质11运行的最低温度，避免储热介质11凝冻。
本公开实施例中通过对冷再蒸汽或汽轮机进行直接抽取高温蒸汽，通过将高温蒸汽传输至第一换热器2内为低温储热介质11提供热量进行热交换，即将抽取冷再蒸汽或汽轮机抽取的蒸汽的热能通过储热介质11进行存储，直接采用蒸汽储热，减少了能量转换过程，提高了能量转换效率，而且储热单元100直接参与热电厂的调峰，满足热电厂的调峰需求。
在一些实施例中，第一换热器2具有第一进口21和第一出口22，第一进口21与第一储热罐12相连，第一出口22与第二储热罐13相连。
在一些具体实施例中，第一储热罐12具有第一储热罐出口122，第二储热罐13具有第二储热罐进口131。第一换热器2的第一进口21与第一储热罐出口122相连以将第一储热罐12内存储的低温储热介质11传输至第一换热器2内，低温储热介质11在第一换热器2内吸收热量变成加热后的储热介质11，通过第一出口22与第二储热罐进口131的连通以将加热后的储热介质11传输至第二储热罐13内进行热量的存储。
在一些实施例中，储热单元100还包括第一开关阀4和第一泵5，第一开关阀4与第一泵5相连，第一开关阀4与第一进口21相连，第一泵5与第一储热罐12相连。
在一些具体实施例中，第一开关阀4具有第一开关阀进口41和第一开关阀出口42，第一泵5具有第一泵进口51和第一泵出口52，第一泵进口51与第一储热罐出口122相连，第一泵出口52与第一开关阀进口41相连，第一开关阀出口42与第一进口21相连，以将第一储热罐12内存储的储热介质11依次通过第一泵5和第一开关阀4传输至第一换热器2内进行热交换。
在一些实施例中，第一开关阀4的设置可以实现第一储热罐12与第一换热器2之间的开启和闭合，第一泵5的设置可以调节第一储热罐12内的储热介质11传输至第一换热器2内的速度和流量，本公开实施例可以根据蒸汽源3的温度对第一泵5的泵速进行调整。
在一些实施例中，第一换热器2具有第二进口23和第二出口24，第二进口23与蒸汽源3连通，第二出口24适于与锅炉700的凝结水泵310的出口连通。
在一些具体实施例中，第二进口23与蒸汽源3连通以将蒸汽源3的高温蒸汽传输至第一换热器2内，高温蒸汽在第一换热器2内与储热介质11发生换热后变成冷凝水，第二出口24与锅炉700的凝结水泵310的出口的连通以将冷凝水传输至凝结水泵310的出口处，实现冷凝水的再利用。
在一些实施例中，储热单元100还包括第二开关阀6和第一调节阀7，第二开关阀6与第一调节阀7相连，第二开关阀6与蒸汽源3连通，第一调节阀7与第二进口23连通。
在一些具体实施例中，第二开关阀6具有第二开关阀进口61和第二开关阀出口62，第一调节阀7具有第一调节阀进口71和第一调节阀出口72，第二开关阀进口61与蒸汽源3连通，第二开关阀出口62与第一调节阀进口71连通，第一调节阀出口72与第二进口23连通，以将蒸汽源3中的高温蒸汽依次通过第二开关阀6和第一调节阀7传输至第一换热器2内。
可以理解的是，本公开实施例是直接对蒸汽中的热量进行储热，而在蒸汽管路的传输过程中，如果只设置第一调节阀7的话是无法确保蒸汽管路的完全闭合的，即第一调节阀7是关不严蒸汽管路的，本公开实施例通过设置第二开关阀6控制蒸汽源3的打开和闭合，通过设置第一调节阀7对蒸汽源3传输至第一换热器2内的蒸汽量进行调节。
本公开实施例通过第一调节阀7对传输至第一换热器2内的高温蒸汽量进行调整，通过第一泵5调整传输至第一换热器2内的储热介质11，以提高储热介质11量与高温蒸汽量相匹配，直接对蒸汽中的热量进行储热，提高储热单元100的储热效率。
在一些实施例中，储热单元100还包括第三开关阀8和第二泵9，第三开关阀8与第二泵9相连，第二泵9与第二出口24连通，第三开关阀8与凝结水泵310的出口连通。
在一些具体实施例中，第三开关阀8具有第三开关阀进口81和第三开关阀出口82，第二泵9具有第二泵进口91和第二泵出口92，第二泵进口91与第二出口24连通，第二泵出口92与第三开关阀进口81连通，第三开发阀出口与凝结水泵310的出口连通，以将经第一换热器2换热后的冷凝水传输至凝结水泵310的出口。
在一些实施例中，第一换热器2内的冷凝水依次通过第二泵9和第三开关阀8传输至凝结水泵310的出口处，以将高温蒸汽的热量进行储存后变成的冷凝水与凝结水泵310出口处的凝结水连通，实现冷凝水的循环利用。
对电网进行调峰时，抽取冷再蒸汽或汽轮机抽气，抽取的高温蒸汽通过第二开关阀6和第一调节阀7后进入第一换热器2内进行放热，第一储热罐12内的低温储热介质11经过第一泵5和第一开关阀4后进入第一换热器2内进行吸热。高温蒸汽在第一换热器2内完全冷凝下来变成的冷凝水经过第二泵9和第三开关阀8传输至凝结水泵310的出口，低温储热介质11在第一换热器2内吸热后变成高温储热介质11传输至第二储热罐13内进行存储，实现将热电厂内多余的热量存储到第二储热罐13内存储。
本公开实施例通过抽取机组蒸汽较少汽轮机做功参与深度调峰，调峰结束后，通过利用储热介质11中存储的热量加热凝结水，进而减少抽气量，从而提高火电机组做功能力。
在一些实施例中，储热供热系统还包括第四开关阀400，第四开关阀400的一端与第二换热器200相连，第四开关阀400的另一端与第二储热罐13相连。
在一些实施例中，储热供热系统还包括第三泵500，第三泵500的一端与第四开关阀400相连，第三泵500的另一端与第二储热罐13相连。
在一些具体实施例中，第四开关阀400具有第四开关阀进口410和第四开关阀出口420，第三泵500具有第三泵进口510和第三泵出口520，第二储热罐13具有第二储热罐出口132，第一储热罐12具有第一储热罐进口121，第二换热器200具有第四进口230和第四出口240，第三泵进口510与第二储热罐出口132连通，第三泵出口520与第四开关阀进口410连通，第四开关阀出口420与第四进口230连通以将第二储热罐13内的高温储热介质11传输至第二换热器200内，高温储热介质11在第二换热器200内经过放热后，通过第四出口240传输至第一储热罐进口121，完成第二储热罐13内的储热介质11的放热。
在一些实施例中，第二换热器200具有第三进口210和第三出口220，第三进口210适于与第一管路300中的给水泵320的出口连通，第三出口220适于与第一管路300中的加热器330相连。
在一些具体实施例中，第三进口210与第一管路300中的给水泵320出口连通，第三出口220与加热器330相连，以将第一管路300中的水和/或蒸汽传输至第二换热器200内 与第二储热罐13内的储热介质11发生热交换后再传输至第一管路300的加热器330的出口处，降低加热器330的功耗。
在一些实施例中，储热供热系统还包括第五开关阀600，第五开关阀600的一端与给水泵320的出口连通，第五开关阀600的另一端与第三进口210连通。
在一些具体实施例中，第五阀门具有第五阀门进口610和第五阀门出口620，第五阀门进口610与给水泵320的出口连通，第五阀门出口620与第三进口210连通以将给水泵320内的水和/或蒸汽传输至第二换热器200内进行热交换。
可以理解的是，第一管路300上还设置有除氧器340，加热器330包括第一加热器3310、第二加热器3320、第三加热器3330、第四加热器3340、第五加热器3350和第六加热器3360，其中，第一加热器3310、第二加热器3320和第三加热器3330为低压加热器330，第四加热器3340、第五加热器3350和第六加热器3360为高压加热器330，多个加热器330的设置与电厂热系统相匹配实现逐层加热，
经凝结水泵310的出口流出的凝结水依次通过第一加热器3310、第二加热器3320和第三加热器3330进行加热后进入除氧器340中进行除氧，除氧后的水和/或蒸汽通过给水泵320后依次经过第四加热器3340、第五加热器3350和第六加热器3360进行层层加热，经第六加热器3360加热后的蒸汽传输至锅炉700内。
可以理解的是，加热器330是通过汽轮机抽气进行逐层加热的，而每一级的温度都是不同的，本公开实施例通过抽取给水泵320出口处的水和/或蒸汽进入到第二换热器200内进行加热，并将加热后的水和/或蒸汽传输至第五加热器3350的出口处，使储热介质11的温度与抽取给水泵320出口处的水和/或蒸汽的温度以及第五加热器3350的出口处的温度相匹配，缩小温度端差，提高储热介质11的放热效率，进而提高储热供热系统的供热效率。
当调峰结束后，第二储热罐13内存储的高温储热介质11经过第三泵500和第四开关阀400进入第二换热器200内进行放热，第一管路300中给水泵320出口处引接的部分水和/或蒸汽通过第五开关阀600进入第二换热器200内进行吸热。高温储热介质11在第二换热器200内进行放热后经第四出口240传输至第一储热罐12，吸热后的水和/或蒸汽通过第三出口220传输至加热器330的出口处，通过第二储热罐13内的高温储热介质11加热第一管路300即蓄热加热锅炉700给水中的给水温度，可以减少加热器330的加热功率，即减少了加热器330抽取量，增加了机组做功。
在本公开的描述中，需要理解的是，术语“中心”、“纵向”、“横向”、“长度”、“宽度”、“厚度”、“上”、“下”、“前”、“后”、“左”、“右”、“竖直”、“水平”、“顶”、“底”“内”、“外”、“顺时针”、“逆时针”、“轴向”、“径向”、“周向”等指示的方位或位置关系为基于附图所示的 方位或位置关系，仅是为了便于描述本公开和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本公开的限制。
此外，术语“第一”、“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括至少一个该特征。在本公开的描述中，“多个”的含义是至少两个，例如两个，三个等，除非另有明确具体的限定。
在本公开中，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”、“固定”等术语应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或成一体；可以是机械连接，也可以是电连接或彼此可通讯；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通或两个元件的相互作用关系，除非另有明确的限定。对于本领域的普通技术人员而言，可以根据具体情况理解上述术语在本公开中的具体含义。
在本公开中，除非另有明确的规定和限定，第一特征在第二特征“上”或“下”可以是第一和第二特征直接接触，或第一和第二特征通过中间媒介间接接触。而且，第一特征在第二特征“之上”、“上方”和“上面”可以是第一特征在第二特征正上方或斜上方，或仅仅表示第一特征水平高度高于第二特征。第一特征在第二特征“之下”、“下方”和“下面”可以是第一特征在第二特征正下方或斜下方，或仅仅表示第一特征水平高度小于第二特征。
在本公开中，术语“一个实施例”、“一些实施例”、“示例”、“具体示例”、或“一些示例”等意指结合该实施例或示例描述的具体特征、结构、材料或者特点包含于本公开的至少一个实施例或示例中。在本说明书中，对上述术语的示意性表述不必须针对的是相同的实施例或示例。而且，描述的具体特征、结构、材料或者特点可以在任一个或多个实施例或示例中以合适的方式结合。此外，在不相互矛盾的情况下，本领域的技术人员可以将本说明书中描述的不同实施例或示例以及不同实施例或示例的特征进行结合和组合。
可以理解的是，上述实施例是示例性的，不能理解为对本公开的限制，本领域的普通技术人员在本公开的范围内可以对上述实施例进行变化、修改、替换和变型。

Claims (10)

  1. 一种储热供热系统，其特征在于，包括：
    储热单元，所述储热单元包括储热罐和第一换热器，所述第一换热器的一端适于与蒸汽源连通，所述第一换热器的另一端与所述储热罐相连，所述第一换热器利用所述蒸汽源的热量对所述储热介质进行热交换；
    第二换热器，所述第二换热器的一端适于与第一管路相连，所述第二换热器的另一端与所述储热单元相连，所述第二换热器利用所述储热单元内的存储热量对所述第一管路内的供热介质进行热交换；
    其中，所述储热罐包括第一储热罐和第二储热罐，所述第一储热罐和/或所述第二储热罐内存储有储热介质，所述储热介质可在所述第一储热罐和所述第二储热罐之间流通；
    所述第一换热器的一端适于与汽轮机的第一蒸汽出口或汽轮机的第二蒸汽出口相连，所述第一蒸汽出口为汽轮机高压缸的排汽口，所述第二蒸汽出口为汽轮机的中间级排汽口，所述第一换热器的另一端分别与所述第一储热罐和所述第二储热罐相连，所述第一换热器利用从所述汽轮机的第一蒸汽出口或第二蒸汽出口抽取的蒸汽中的热量对所述第一储热罐内的储热介质进行热交换，经热交换后的储热介质流通至第二储热罐。
  2. 根据权利要求1所述的储热供热系统，其特征在于，所述第一换热器具有第一进口和第一出口，所述第一进口与所述第一储热罐相连，所述第一出口与所述第二储热罐相连。
  3. 根据权利要求2所述的储热供热系统，其特征在于，所述储热单元还包括第一开关阀和第一泵，所述第一开关阀与所述第一泵相连，所述第一开关阀与所述第一进口相连，所述第一泵与所述第一储热罐相连。
  4. 根据权利要求1至3中任一项所述的储热供热系统，其特征在于，所述第一换热器具有第二进口和第二出口，所述第二进口与所述蒸汽源连通，所述第二出口适于与锅炉的凝结水泵的出口连通。
  5. 根据权利要求4所述的储热供热系统，其特征在于，所述储热单元还包括第二开关阀和第一调节阀，所述第二开关阀与所述第一调节阀相连，所述第二开关阀与所述蒸汽源连通，所述第一调节阀与所述第二进口连通。
  6. 根据权利要求4或5所述的储热供热系统，其特征在于，所述储热单元还包括第三开关阀和第二泵，所述第三开关阀与所述第二泵相连，所述第二泵与所述第二出口连通，所述第三开关阀与所述凝结水泵的出口连通。
  7. 根据权利要求1至6中任一项所述的储热供热系统，其特征在于，还包括第四开关阀，所述第四开关阀的一端与所述第二换热器相连，所述第四开关阀的另一端与所述第二储热罐相连。
  8. 根据权利要求7所述的储热供热系统，其特征在于，还包括第三泵，所述第三泵的一端与所述第四开关阀相连，所述第三泵的另一端与所述第二储热罐相连。
  9. 根据权利要求1至8中任一项所述的储热供热系统，其特征在于，所述第二换热器具有第三进口和第三出口，所述第三进口适于与所述第一管路中的给水泵的出口连通，所述第三出口适于与所述第一管路中的加热器相连。
  10. 根据权利要求9所述的储热供热系统，其特征在于，还包括第五开关阀，所述第五开关阀的一端与所述给水泵的出口连通，所述第五开关阀的另一端与所述第三进口连通。
PCT/CN2023/093942 2023-03-09 2023-05-12 储热供热系统 Ceased WO2024183152A1 (zh)

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