CN116857985A - Circulating water switching system and method for high back pressure unit in pure condensation-heat supply modes - Google Patents

Circulating water switching system and method for high back pressure unit in pure condensation-heat supply modes Download PDF

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Publication number
CN116857985A
CN116857985A CN202310834137.6A CN202310834137A CN116857985A CN 116857985 A CN116857985 A CN 116857985A CN 202310834137 A CN202310834137 A CN 202310834137A CN 116857985 A CN116857985 A CN 116857985A
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China
Prior art keywords
heat supply
inlet
pure
outlet
regulating valve
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Pending
Application number
CN202310834137.6A
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Chinese (zh)
Inventor
安欣
李钊
张开鹏
曹勇
张海龙
孙鹏
李继福
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Xian Thermal Power Research Institute Co Ltd
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Xian Thermal Power Research Institute Co Ltd
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Priority to CN202310834137.6A priority Critical patent/CN116857985A/en
Publication of CN116857985A publication Critical patent/CN116857985A/en
Pending legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28B—STEAM OR VAPOUR CONDENSERS
    • F28B1/00—Condensers in which the steam or vapour is separate from the cooling medium by walls, e.g. surface condenser
    • F28B1/02—Condensers in which the steam or vapour is separate from the cooling medium by walls, e.g. surface condenser using water or other liquid as the cooling medium
    • 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
    • F24D1/00—Steam central heating systems
    • F24D1/04—Steam central heating systems operating with exhaust steam
    • 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
    • F24D19/1003—Arrangement or mounting of control or safety devices for steam heating systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28B—STEAM OR VAPOUR CONDENSERS
    • F28B11/00—Controlling arrangements with features specially adapted for condensers

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Heat Treatment Of Water, Waste Water Or Sewage (AREA)

Abstract

The invention discloses a circulating water switching system and a circulating water switching method for a high back pressure unit in a pure condensation-heat supply mode, and belongs to the technical field of energy conservation of thermal power plants; the system comprises a pure condensing unit, a heat supply unit, a condenser and a flow control unit, wherein the opening degrees of a pure condensing inlet regulating valve and a heat supply inlet regulating valve are respectively regulated by the flow control unit, and the outlet flow of the condenser is kept unchanged; the pipeline flow of the pure condensation unit and the pipeline flow of the heat supply unit are dynamically adjusted, and the switching of the circulating water system in the pure condensation-heat supply mode is achieved. The system can effectively realize flexible and economic circulating water operation modes of the high back pressure heat supply power plant unit without unit shutdown, and has good economic benefit when the circulating water system is switched in a pure condensation-heat supply mode.

Description

Circulating water switching system and method for high back pressure unit in pure condensation-heat supply modes
Technical Field
The invention belongs to the technical field of energy conservation of thermal power plants, and relates to a circulating water switching system and a circulating water switching method for a high back pressure unit in a pure condensation-heat supply mode.
Background
The high-parameter steam is done work in the steam turbine, the exhaust steam is all discharged into the condenser, the condenser is cooled by circulating water, all the exhaust steam is condensed into water, the water flows into a hot well at the lower part of the condenser, is pumped to a condensed water pipeline by a condensing pump and is sent to a deaerator, then to a water feeding pump, and then is fed into a boiler steam drum, and is reheated into high-parameter steam to push the steam turbine to do work, thus being a pure condensing unit. If some steam which does not completely do work is extracted from the steam turbine, the steam is supplied to a heat supply network (for heating residents, other factories and the like), and the rest of the steam enters a condenser to be condensed after the steam is completely done in the steam turbine, so that the steam is a heat supply unit.
Most high back pressure heat supply power plants adopt a control mode of unit outage in the process of switching the circulating water system in a pure condensation-heat supply mode. The condenser circulating water is discharged to a circulating water return pipeline after heat exchange of the condenser from an outlet of the circulating water pump in a pure condensation mode; the condenser circulating water is discharged from the outlet of the heat supply network circulating water pump in a heat supply mode, and is discharged to the heat supply network pipeline after being heated by the condenser. Because of the valve and the measuring point setting reasons of the circulating water system and the heat supply network system, most power plants need to be switched after the unit is stopped whether the pure condensation mode is switched to the heat supply mode or the heat supply mode is switched to the pure condensation mode, so that the safety and the stability of the unit are affected, and the overhaul period of the heat supply unit is prolonged.
Disclosure of Invention
The invention aims to solve the technical problems that in the prior art, a pure condensation circulating water mode and a heat supply network circulating water mode of a high back pressure heat supply unit are required to be switched after the unit is stopped, the running flexibility of the unit is affected, the capacity compensation cost of the unit under a normal peak regulation working condition is increased, and the economy of the unit is affected, and provides a circulating water switching system and a circulating water switching method for the pure condensation-heat supply mode of the high back pressure unit.
In order to achieve the purpose, the invention is realized by adopting the following technical scheme:
in a first aspect, the invention provides a circulating water switching system for a high back pressure unit in a pure condensation-heat supply mode, which comprises a pure condensation unit, a heat supply unit, a condenser 8 and a flow control unit; the pure condensing unit is respectively connected with an inlet and an outlet of the condenser 8; the heat supply unit is respectively connected with an inlet and an outlet of the condenser 8; the flow control unit is arranged on the pipeline of the pure condensing unit and the heat supply unit and is used for adjusting the inlet flow of the pure condensing unit and the heat supply unit so as to realize the switching of the pure condensing mode and the heat supply mode.
The system is further improved in that:
the pure condensing unit comprises a pure condensing inlet stop valve 1, a pure condensing inlet regulating valve 2 and a pure condensing outlet stop valve 3; the inlet of the pure condensation inlet stop valve 1 is connected with a circulating water pipeline, and the outlet of the pure condensation inlet stop valve is connected with the inlet of the pure condensation inlet regulating valve 2; the outlet of the pure condensation inlet regulating valve 2 is connected with the inlet of the condenser 8; the inlet of the pure condensation outlet stop valve 3 is connected with the outlet of the condenser 8, and the outlet is connected with a circulating water return pipeline.
The heat supply unit comprises a heat supply inlet stop valve 4, a heat supply inlet regulating valve 5 and a heat supply outlet stop valve 6; the inlet of the heat supply inlet stop valve 4 is connected with a heat supply network circulating water pipeline, and the outlet is connected with the inlet of the heat supply inlet regulating valve 5; the outlet of the heat supply inlet regulating valve 5 is connected with the inlet of the condenser 8; the inlet of the heat supply outlet stop valve 6 is connected with the outlet of the condenser 8, and the outlet is connected with a heat supply network pipeline.
The flow control unit comprises a first flow measuring device 71, a second flow measuring device 72 and a third flow measuring device 73; the first flow measuring device 71 is arranged on the outlet pipeline of the pure condensation inlet regulating valve 2; the second flow measuring device 72 is arranged on the outlet pipe of the heating inlet regulating valve 5; the third flow measuring device 73 is arranged on the outlet pipe of the condenser 8.
The output end of the first flow measuring device 71 is electrically connected with the input end of the first signal processor 9, and the output end of the first signal processor 9 is electrically connected with the pure condensation inlet adjusting valve 2.
The output end of the second flow measuring device 72 is electrically connected with the input end of the second signal processor 10, and the output end of the second signal processor 10 is electrically connected with the heat supply inlet regulating valve 5.
The output end of the third flow measuring device 73 is electrically connected with the input end of the third signal processor 11, and the output end of the third signal processor 11 is electrically connected with the pure condensation inlet stop valve 1, the pure condensation inlet regulating valve 2, the heat supply inlet stop valve 4 and the heat supply inlet regulating valve 5 respectively.
In a second aspect, the invention provides a circulating water switching method adopting the high back pressure unit pure condensation-heat supply mode of the system, comprising the following steps:
1) The pure condensing mode is switched to the heat supply mode:
opening the heat supply inlet stop valve 4 and the heat supply outlet stop valve 6, controlling the opening degree of the pure condensation inlet regulating valve 2 to gradually decrease through the first flow measuring device 71, controlling the opening degree of the heat supply inlet regulating valve 5 to gradually increase through the second flow measuring device 72, and simultaneously keeping the outlet flow of the condenser 8 unchanged through the third flow measuring device 73; until the pure condensation inlet regulating valve 2 is completely closed, and the heat supply inlet regulating valve 5 is completely opened; then closing the pure condensation inlet stop valve 1 and the pure condensation outlet stop valve 3;
2) The heat supply mode is switched to the pure condensation mode:
opening the pure condensing inlet stop valve 1 and the pure condensing outlet stop valve 3, controlling the opening of the pure condensing inlet regulating valve 2 to gradually increase through the first flow measuring device 71, controlling the opening of the heat supply inlet regulating valve 5 to gradually decrease through the second flow measuring device 72, and simultaneously keeping the outlet flow of the condenser 8 unchanged through the third flow measuring device 73; until the heating inlet regulating valve 5 is completely closed, the pure condensing inlet regulating valve 2 is completely opened; the heating inlet shutoff valve 4 and the heating outlet shutoff valve 6 are then closed.
Compared with the prior art, the invention has the following beneficial effects:
the invention adopts the flow control unit to dynamically adjust the pipeline flow of the pure condensing unit and the heating unit in real time respectively, and maintains the outlet flow of the condenser unchanged; the high-back pressure heat supply power plant unit can be flexibly switched between the heat supply unit and the pure condensing unit without stopping the unit, so that potential safety hazards caused by switching and stopping the unit are avoided, and the stability of the unit is influenced; and further shortens the maintenance period of the heat supply unit and improves the running economy of the thermal power peak shaving current situation.
Furthermore, the invention adopts the pure condensing inlet stop valve and the heat supply inlet stop valve, and when the system fails, the stop valve is closed in time to ensure the reliable isolation of the system, and the safe and stable operation of the system is maintained.
Further, the invention electrically connects the first signal processor with the first flow measuring device to control the opening degree of the pure condensing inlet regulating valve, the second signal processor with the second flow measuring device to control the opening degree of the heat supply inlet regulating valve, and simultaneously, the third flow measuring device is electrically connected with the third signal processor to respectively control the pure condensing inlet stop valve, the pure condensing inlet regulating valve, the heat supply inlet stop valve and the heat supply inlet regulating valve. The dual control increases the accuracy of the system and can give consideration to the heating economy and the peak shaving flexibility of the high back pressure heating unit.
Drawings
For a clearer description of the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present invention and should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic diagram of a circulating water switching system in two modes of pure condensation and heat supply of a high back pressure unit.
Wherein: 1-a pure condensing inlet stop valve; 2-pure condensing inlet regulating valve; 3-pure condensing outlet stop valve; 4-a heat supply inlet stop valve; 5-a heating inlet regulating valve; 6-a heat supply outlet stop valve; 71-a first flow measurement device; 72-a second flow measurement device; 73-third flow measurement means; 8-a condenser; 9-a first signal processor; 10-a second signal processor; 11-a third signal processor.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
In the description of the embodiments of the present invention, it should be noted that, if the terms "upper," "lower," "horizontal," "inner," and the like indicate an azimuth or a positional relationship based on the azimuth or the positional relationship shown in the drawings, or the azimuth or the positional relationship in which the inventive product is conventionally put in use, it is merely for convenience of describing the present invention and simplifying the description, and does not indicate or imply that the apparatus or element to be referred to must have a specific azimuth, be configured and operated in a specific azimuth, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.
Furthermore, the term "horizontal" if present does not mean that the component is required to be absolutely horizontal, but may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the embodiments of the present invention, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" should be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
The invention is described in further detail below with reference to the attached drawing figures:
referring to fig. 1, the circulating water switching system with the high back pressure unit in a pure condensation-heat supply mode disclosed by the invention comprises a pure condensation unit, a heat supply unit, a condenser 8 and a flow control unit.
The pure condensing unit comprises a pure condensing inlet stop valve 1, a pure condensing inlet regulating valve 2 and a pure condensing outlet stop valve 3; the inlet of the pure condensation inlet stop valve 1 is connected with a circulating water pipeline, and the outlet of the pure condensation inlet stop valve is connected with the inlet of the pure condensation inlet regulating valve 2; the outlet of the pure condensation inlet regulating valve 2 is connected with the inlet of the condenser 8; the inlet of the pure condensation outlet stop valve 3 is connected with the outlet of the condenser 8, and the outlet is connected with a circulating water return pipeline.
The heating unit comprises a heating inlet stop valve 4, a heating inlet regulating valve 5 and a heating outlet stop valve 6; the inlet of the heat supply inlet stop valve 4 is connected with a heat supply network circulating water pipeline, and the outlet is connected with the inlet of the heat supply inlet regulating valve 5; the outlet of the heat supply inlet regulating valve 5 is connected with the inlet of the condenser 8; the inlet of the heat supply outlet stop valve 6 is connected with the outlet of the condenser 8, and the outlet is connected with a heat supply network pipeline.
The inlet of the condenser 8 is respectively connected with the outlet of the pure condensation inlet regulating valve 2 and the outlet of the heating inlet regulating valve 5; the outlet of the condenser 8 is respectively connected with the inlet of the pure condensation outlet stop valve 3 and the inlet of the heat supply outlet stop valve 6.
The flow control unit comprises a first flow measuring device 71, a second flow measuring device 72 and a third flow measuring device 73; the first flow measuring device 71 is arranged on the outlet pipeline of the pure condensation inlet regulating valve 2; the output end of the first flow measuring device 71 is electrically connected with the input end of the first signal processor 9, and the output end of the first signal processor 9 is electrically connected with the pure condensation inlet regulating valve 2; the second flow measuring device 72 is arranged on the outlet pipe of the heating inlet regulating valve 5; the output end of the second flow measuring device 72 is electrically connected with the input end of the second signal processor 10, and the output end of the second signal processor 10 is electrically connected with the heating inlet regulating valve 5; the third flow measuring device 73 is arranged on an outlet pipeline of the condenser 8; the output end of the third flow measuring device 73 is electrically connected with the input end of the third signal processor 11, and the output end of the third signal processor 11 is electrically connected with the pure condensation inlet stop valve 1, the pure condensation inlet regulating valve 2, the heat supply inlet stop valve 4 and the heat supply inlet regulating valve 5 respectively.
The invention discloses a circulating water switching method for a high back pressure unit in a pure condensation-heat supply mode, which comprises the following steps:
1) The pure condensing mode is switched to the heat supply mode:
opening the heat supply inlet stop valve 4 and the heat supply outlet stop valve 6, controlling the opening degree of the pure condensation inlet regulating valve 2 to gradually decrease through the first flow measuring device 71, controlling the opening degree of the heat supply inlet regulating valve 5 to gradually increase through the second flow measuring device 72, and simultaneously keeping the outlet flow of the condenser 8 unchanged through the third flow measuring device 73; until the pure condensation inlet regulating valve 2 is completely closed, and the heat supply inlet regulating valve 5 is completely opened; the pure gel inlet shutoff valve 1 and the pure gel outlet shutoff valve 3 are then closed.
2) The heat supply mode is switched to the pure condensation mode:
opening the pure condensing inlet stop valve 1 and the pure condensing outlet stop valve 3, controlling the opening of the pure condensing inlet regulating valve 2 to gradually increase through the first flow measuring device 71, controlling the opening of the heat supply inlet regulating valve 5 to gradually decrease through the second flow measuring device 72, and simultaneously keeping the outlet flow of the condenser 8 unchanged through the third flow measuring device 73; until the heating inlet regulating valve 5 is completely closed, the pure condensing inlet regulating valve 2 is completely opened; the heating inlet shutoff valve 4 and the heating outlet shutoff valve 6 are then closed.
The flow control unit of the invention has the following working procedures:
the first flow measuring device 71 measures an outlet flow signal F1 of the pure coagulation inlet regulating valve 2, the outlet flow signal F1 enters the first signal processor 9, and the first signal processor 9 sends a command to the pure coagulation inlet regulating valve 2; the second flow measuring device 72 measures an outlet flow signal F2 of the heating inlet regulating valve 5, the outlet flow signal F2 enters the second signal processor 10, and the second signal processor 10 sends instructions to the heating inlet regulating valve 5; the third flow measuring device 73 measures an outlet flow signal F3 of the condenser 8, the outlet flow signal F3 enters the third signal processor 11, and the third signal processor 11 sends instructions to the pure condensation inlet shutoff valve 1, the pure condensation inlet regulating valve 2, the heat supply inlet shutoff valve 4 and the heat supply inlet regulating valve 5.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (8)

1. The circulating water switching system with the high back pressure unit in a pure condensation-heat supply mode is characterized by comprising a pure condensation unit, a heat supply unit, a condenser (8) and a flow control unit; the pure condensing unit is respectively connected with an inlet and an outlet of the condenser (8); the heat supply unit is respectively connected with an inlet and an outlet of the condenser (8); the flow control unit is arranged on the pipeline of the pure condensing unit and the heat supply unit and is used for adjusting the inlet flow of the pure condensing unit and the heat supply unit so as to realize the switching of the pure condensing mode and the heat supply mode.
2. The circulating water switching system with two modes of pure condensation and heat supply of the high back pressure unit according to claim 1, wherein the pure condensation unit comprises a pure condensation inlet stop valve (1), a pure condensation inlet regulating valve (2) and a pure condensation outlet stop valve (3); the inlet of the pure condensation inlet stop valve (1) is connected with a circulating water pipeline, and the outlet is connected with the inlet of the pure condensation inlet regulating valve (2); the outlet of the pure condensation inlet regulating valve (2) is connected with the inlet of the condenser (8); the inlet of the pure condensation outlet stop valve (3) is connected with the outlet of the condenser (8), and the outlet is connected with the circulating water return pipeline.
3. The circulating water switching system of a high back pressure unit in both pure condensation and heat supply modes according to claim 1 or 2, wherein the heat supply unit comprises a heat supply inlet stop valve (4), a heat supply inlet regulating valve (5) and a heat supply outlet stop valve (6); the inlet of the heat supply inlet stop valve (4) is connected with a heat supply network circulating water pipeline, and the outlet is connected with the inlet of the heat supply inlet regulating valve (5); an outlet of the heat supply inlet regulating valve (5) is connected with an inlet of the condenser (8); an inlet of the heat supply outlet stop valve (6) is connected with an outlet of the condenser (8), and the outlet is connected with a heat supply network pipeline.
4. A high back pressure unit double-condensing-heating circulating water switching system according to claim 3, characterized in that the flow control unit comprises a first flow measuring device (71), a second flow measuring device (72) and a third flow measuring device (73); the first flow measuring device (71) is arranged on an outlet pipeline of the pure condensation inlet regulating valve (2); the second flow measuring device (72) is arranged on an outlet pipeline of the heat supply inlet regulating valve (5); the third flow measuring device (73) is arranged on an outlet pipeline of the condenser (8).
5. The circulating water switching system for both pure condensing and heat supplying modes of high back pressure unit according to claim 4, wherein the output end of the first flow measuring device (71) is electrically connected with the input end of the first signal processor (9), and the output end of the first signal processor (9) is electrically connected with the pure condensing inlet regulating valve (2).
6. The circulating water switching system of the high back pressure unit pure condensation-heat supply mode according to claim 4, wherein the output end of the second flow measuring device (72) is electrically connected with the input end of the second signal processor (10), and the output end of the second signal processor (10) is electrically connected with the heat supply inlet regulating valve (5).
7. The circulating water switching system in two modes of pure condensation and heat supply of a high back pressure unit according to claim 4, wherein the output end of the third flow measuring device (73) is electrically connected with the input end of the third signal processor (11), and the output end of the third signal processor (11) is electrically connected with the pure condensation inlet stop valve (1), the pure condensation inlet regulating valve (2), the heat supply inlet stop valve (4) and the heat supply inlet regulating valve (5) respectively.
8. A method for switching circulating water in two modes of pure condensation and heat supply of a high back pressure unit by adopting the system of any one of claims 1 to 7, which is characterized by comprising the following steps:
1) The pure condensing mode is switched to the heat supply mode:
opening a heat supply inlet stop valve (4) and a heat supply outlet stop valve (6), controlling the opening degree of the pure condensation inlet regulating valve (2) to be gradually reduced through a first flow measuring device (71), controlling the opening degree of the heat supply inlet regulating valve (5) to be gradually increased through a second flow measuring device (72), and simultaneously keeping the outlet flow of the condenser (8) unchanged through a third flow measuring device (73); until the pure condensation inlet regulating valve (2) is completely closed, and the heat supply inlet regulating valve (5) is completely opened; then closing the pure condensation inlet stop valve (1) and the pure condensation outlet stop valve (3);
2) The heat supply mode is switched to the pure condensation mode:
opening a pure condensation inlet stop valve (1) and a pure condensation outlet stop valve (3), controlling the opening degree of a pure condensation inlet regulating valve (2) to be gradually increased through a first flow measuring device (71), controlling the opening degree of a heat supply inlet regulating valve (5) to be gradually reduced through a second flow measuring device (72), and simultaneously keeping the outlet flow of a condenser (8) unchanged through a third flow measuring device (73); until the heat supply inlet regulating valve (5) is completely closed, the pure condensation inlet regulating valve (2) is completely opened; then the heat supply inlet stop valve (4) and the heat supply outlet stop valve (6) are closed.
CN202310834137.6A 2023-07-07 2023-07-07 Circulating water switching system and method for high back pressure unit in pure condensation-heat supply modes Pending CN116857985A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310834137.6A CN116857985A (en) 2023-07-07 2023-07-07 Circulating water switching system and method for high back pressure unit in pure condensation-heat supply modes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310834137.6A CN116857985A (en) 2023-07-07 2023-07-07 Circulating water switching system and method for high back pressure unit in pure condensation-heat supply modes

Publications (1)

Publication Number Publication Date
CN116857985A true CN116857985A (en) 2023-10-10

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Application Number Title Priority Date Filing Date
CN202310834137.6A Pending CN116857985A (en) 2023-07-07 2023-07-07 Circulating water switching system and method for high back pressure unit in pure condensation-heat supply modes

Country Status (1)

Country Link
CN (1) CN116857985A (en)

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