CN111306597A - Deep energy-saving comprehensive utilization and recovery system and method for closed circulating water waste heat of thermal power plant - Google Patents
Deep energy-saving comprehensive utilization and recovery system and method for closed circulating water waste heat of thermal power plant Download PDFInfo
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- CN111306597A CN111306597A CN202010130630.6A CN202010130630A CN111306597A CN 111306597 A CN111306597 A CN 111306597A CN 202010130630 A CN202010130630 A CN 202010130630A CN 111306597 A CN111306597 A CN 111306597A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 109
- 239000002918 waste heat Substances 0.000 title claims abstract description 20
- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000011084 recovery Methods 0.000 title claims abstract description 12
- 238000010521 absorption reaction Methods 0.000 claims abstract description 36
- 230000001172 regenerating effect Effects 0.000 claims abstract description 17
- 238000001816 cooling Methods 0.000 claims abstract description 15
- 238000000605 extraction Methods 0.000 claims description 7
- 230000002427 irreversible effect Effects 0.000 abstract description 2
- 238000010438 heat treatment Methods 0.000 abstract 1
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 239000000498 cooling water Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
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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
- F24D3/00—Hot-water central heating systems
- F24D3/02—Hot-water central heating systems with forced circulation, e.g. by pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D15/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
- F01D15/10—Adaptations for driving, or combinations with, electric generators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/32—Collecting of condensation water; Drainage ; Removing solid particles
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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
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D3/00—Hot-water central heating systems
- F24D3/10—Feed-line arrangements, e.g. providing for heat-accumulator tanks, expansion tanks ; Hydraulic components of a central heating system
- F24D3/1058—Feed-line arrangements, e.g. providing for heat-accumulator tanks, expansion tanks ; Hydraulic components of a central heating system disposition of pipes and pipe connections
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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
- F24D3/00—Hot-water central heating systems
- F24D3/18—Hot-water central heating systems using heat pumps
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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
- F25B15/00—Sorption machines, plants or systems, operating continuously, e.g. absorption type
- F25B15/02—Sorption machines, plants or systems, operating continuously, e.g. absorption type without inert gas
- F25B15/06—Sorption machines, plants or systems, operating continuously, e.g. absorption type without inert gas the refrigerant being water vapour evaporated from a salt solution, e.g. lithium bromide
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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
- F25B27/00—Machines, plants or systems, using particular sources of energy
- F25B27/02—Machines, plants or systems, using particular sources of energy using waste heat, e.g. from internal-combustion engines
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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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/27—Relating to heating, ventilation or air conditioning [HVAC] technologies
- Y02A30/274—Relating to heating, ventilation or air conditioning [HVAC] technologies using waste energy, e.g. from internal combustion engine
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/62—Absorption based systems
- Y02B30/625—Absorption based systems combined with heat or power generation [CHP], e.g. trigeneration
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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)
- Materials Engineering (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
Abstract
The invention discloses a closed circulating water waste heat deep energy-saving comprehensive utilization and recovery system and method for a thermal power plant, and belongs to the technical field of cogeneration energy saving. The invention comprises a steam turbine, a condenser, a cooling tower, a regenerative heater, an absorption heat pump and a heat exchanger. Under the condition that the existing system is not changed, a set of absorption heat pump waste heat exchange equipment is newly added, meanwhile, valves are arranged at the inlet and the outlet of the equipment, and the switching connection of the heat exchange system is realized through the switches of the valves. The waste heat utilization system is reasonably designed based on the principle of energy gradient utilization, realizes gradient temperature rise heating of condensed water, reduces irreversible loss in the heat exchange process, and has high practical application value.
Description
Technical Field
The invention relates to a closed circulating water waste heat deep energy-saving comprehensive utilization and recovery system and method for a thermal power plant, and belongs to the technical field of cogeneration energy saving.
Background
After steam discharged into a low-pressure cylinder by a steam turbine of a thermal power plant does work, the steam enters a condenser to form condensation heat, the condensation heat usually accounts for more than 30% of total input heat of primary energy, the part of heat is generally discharged into the atmosphere through an air cooling island or a cooling tower or directly discharged into seawater to form huge cold end loss, and the reason is the main reason that the thermal efficiency of the existing thermal power unit is low. Therefore, it is urgent to find a method for improving the thermal efficiency of the unit. The closed circulating water system of the thermal power plant is used for cooling an auxiliary machine, an equipment bearing and the like, and closed circulating water is sealed in a cooling device and a cooling water pipeline, so that the closed circulating water system has higher requirement on water quality and has higher water temperature compared with open circulating water of the system.
At present, among the thermal power plant unit design closed circulating water system, closed circulating water carries out the heat transfer through heat exchanger and open circulating water after the user absorbs the heat, and the heat of giving out is absorbed the discharge by open circulating water, and this part waste heat is not by make full use of. Based on the above, the invention provides the system and the method for deeply and comprehensively utilizing and recovering the waste heat of the closed circulating water of the thermal power plant in an energy-saving manner on the premise of not changing the existing equipment system.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a system which is reasonable in design, reliable in performance and capable of realizing closed circulating water waste heat utilization of a thermal power plant.
The technical scheme adopted by the invention for solving the problems is as follows: the utility model provides an energy-conserving recycle system that synthesizes of closed circulating water waste heat degree of depth of thermal power plant which characterized in that: the system comprises a steam turbine, a condenser, a cooling tower, a regenerative heater, an absorption heat pump and a heat exchanger; the steam inlet of the steam turbine is connected with a first pipeline, the steam outlet of the steam turbine is connected with a condenser through a sixth pipeline, the circulating water supply port of the condenser is connected with a cooling tower through a thirteenth pipeline, an eighth valve and an eleventh pipeline, the circulating water return port of the condenser is connected with the cooling tower through a twelfth pipeline, a seventh valve and a thirty pipeline, the water side inlet of the regenerative heater is connected with the outlet of a condensate pump through a ninth pipeline, a third valve, a tenth pipeline, a second valve and an eleventh pipeline, the inlet of the condensate pump is connected with the condenser through a twelfth pipeline, a first valve and a thirteenth pipeline, the water side outlet of the regenerative heater is connected with a fourth pipeline, a fourth valve and a fifth pipeline, the steam side inlet of the regenerative heater is connected with the middle-stage steam extraction port of the steam turbine through a third pipeline, a sixth valve and a second pipeline, the water drainage outlet of the regenerative heater is connected with the condenser through an eighth pipeline, a fifth valve and a seventh pipeline, the open circulating water supply port of the heat exchanger is connected to a thirty-second pipeline through a twenty-seventh pipeline, a ninth valve and a twenty-eighth pipeline, the open circulating water return port of the heat exchanger is connected to a thirty-third pipeline through a twenty-sixth pipeline, a tenth valve and a twenty-ninth pipeline, the closed circulating water inlet of the heat exchanger is connected to a closed circulating water user through a twenty-fourteenth pipeline, an eleventh valve and a twenty-second pipeline, the closed circulating water outlet of the heat exchanger is connected to the closed circulating water user through a twenty-fifth pipeline, a twelfth valve and a twenty-third pipeline, and the closed circulating water inlet of the absorption heat pump is connected to a twenty-second pipeline through a nineteenth pipeline, a fourteenth valve and a twenty-first pipeline, the closed circulating water outlet of the absorption heat pump is connected to a twenty-third pipeline through an eighteenth pipeline, a thirteenth valve and a twentieth pipeline, a condensed water inlet of the absorption heat pump is connected to an eleventh pipeline through a sixteenth pipeline, a fifteenth valve and a fifteenth pipeline, a condensed water outlet of the absorption heat pump is connected to a tenth pipeline through a seventeenth pipeline, a sixteenth valve and a fourteenth pipeline, a driving steam inlet of the absorption heat pump is connected to a steam turbine through a thirty-fifth pipeline, a seventeenth valve and a thirty-fourth pipeline, and a drain outlet of the absorption heat pump is connected to a condenser through a thirty-seventh pipeline, an eighteenth valve and a thirty-sixth pipeline.
Furthermore, the inlet water of the closed circulating water of the absorption heat pump can be adjusted through an eleventh valve and a fourteenth valve, and the outlet water of the closed circulating water can be adjusted through a twelfth valve and a thirteenth valve to form a closed water circulation.
Furthermore, the inlet water of the condensed water of the absorption heat pump can be adjusted through a second valve and a fifteenth valve, and the outlet water of the condensed water can be adjusted through a sixteenth valve, so that a condensed water circulation is formed.
Furthermore, the steam extraction amount of the absorption heat pump can be adjusted through a seventeenth valve, and the steam extraction drainage amount can be adjusted through an eighteenth valve, so that a steam extraction drainage cycle is formed.
Furthermore, the absorption heat pump utilizes heat released by a steam turbine extraction and a user of a closed circulating water system to heat condensed water, so that waste heat recovery is realized.
Furthermore, the absorption heat pump is opened and closed through a valve, the connection mode of a heat exchange system is changed, and free switching between operation and stop is achieved.
The working method of the thermal power plant closed circulating water waste heat deep energy-saving comprehensive utilization and recovery system is characterized in that: the process is as follows:
when the heat exchanger is put into use, the thirteenth valve, the fourteenth valve, the fifteenth valve and the sixteenth valve are closed, the opening degrees of the ninth valve and the tenth valve are opened and adjusted, the opening degrees of the eleventh valve and the twelfth valve are adjusted, and the flow rate of open circulating water and the flow rate of closed circulating water entering the heat exchanger are adjusted, so that the temperature of a user entering the closed circulating water is adjusted;
when the absorption heat pump is put into use, the ninth valve, the tenth valve, the eleventh valve and the twelfth valve are closed, the opening degrees of the second valve, the fifteenth valve, the sixteenth valve, the seventeenth valve and the eighteenth valve are opened and adjusted, the opening degrees of the thirteenth valve and the fourteenth valve are adjusted, and the flow rate of the condensate water and the flow rate of the closed circulating water entering the heat exchanger are adjusted, so that the temperature of users entering the condensate water and the closed circulating water is adjusted.
Compared with the prior art, the invention has the following advantages and effects:
(1) the invention has reasonable design and simple improved structure, and a set of absorption heat pump system is additionally arranged on the basis of the prior art, thereby realizing the effective recovery of the closed circulating water waste heat of the thermal power plant;
(2) the invention can freely switch between use and stop by opening and closing the valve and changing the connection mode of the heat exchange system, thereby realizing the temperature regulation of condensed water and closed circulating water users, and having simple operation and convenient control;
(3) based on the principle of energy cascade utilization, the waste heat utilization system is reasonably designed, the condensed water is heated, the irreversible loss in the heat exchange process is effectively reduced, and the method has high practical application value.
Drawings
Fig. 1 is a schematic structural diagram of a closed circulating water waste heat deep energy-saving comprehensive utilization and recovery system of a thermal power plant in the embodiment of the invention.
FIG. 2 is a schematic view of a heat exchanger according to an embodiment of the present invention.
Fig. 3 is a schematic structural view of an absorption heat pump according to an embodiment of the present invention.
In the figure: a steam turbine 1, a condenser 2, a cooling tower 3, a regenerative heater 4, a condensate pump 5, an absorption heat pump 6, a heat exchanger 7,
The first pipe 8, the second pipe 56, the third pipe 22, the fourth pipe 18, the fifth pipe 20, the sixth pipe 9, the seventh pipe 25, the eighth pipe 21, the ninth pipe 17, the tenth pipe 15, the eleventh pipe 13, the twelfth pipe 12, the thirteenth pipe 10, the fourteenth pipe 55, the fifteenth pipe 54, the sixteenth pipe 50, the seventeenth pipe 51, the eighteenth pipe 48, the nineteenth pipe 49, the twentieth pipe 44, the twenty-first pipe 45, the twenty-second pipe 40, the twenty-third pipe 43, the twenty-fourth pipe 38, the twenty-fifth pipe 41, the twenty-sixth pipe 37, the twenty-seventh pipe 36, the twenty-eighth pipe 32, the twenty-ninth pipe 33, the thirty-third pipe 28, the thirty-eleventh pipe 31, the thirty-second pipe 26, the thirty-third pipe 29, the thirty-fourth pipe 57, the thirty-fifth pipe 59, the thirty-sixth pipe 60, the twenty-sixth pipe 60, A thirty-seventh pipeline 62,
The first valve 11, the second valve 14, the third valve 16, the fourth valve 19, the fifth valve 23, the sixth valve 24, the seventh valve 27, the eighth valve 30, the ninth valve 34, the tenth valve 35, the eleventh valve 39, the twelfth valve 42, the thirteenth valve 46, the fourteenth valve 47, the fifteenth valve 52, the sixteenth valve 53, the seventeenth valve 58, and the eighteenth valve 61.
Detailed Description
The present invention will be described in further detail below by way of examples with reference to the accompanying drawings, which are illustrative of the present invention and are not to be construed as limiting the present invention.
Referring to fig. 1, in this embodiment, the closed circulating water waste heat deep energy-saving comprehensive utilization and recovery system for a thermal power plant includes a steam turbine 1, a condenser 2, a cooling tower 3, a regenerative heater 4, an absorption heat pump 6 and a heat exchanger 7; the steam inlet of the steam turbine 1 is connected with a first pipeline 8, the steam outlet of the steam turbine 1 is connected with a condenser 2 through a sixth pipeline 9, the circulating water supply port of the condenser 2 is connected with a cooling tower 3 through a thirteenth pipeline 29, an eighth valve 30 and an eleventh pipeline 31, the circulating water return port of the condenser 2 is connected with the cooling tower 3 through a twelfth pipeline 26, a seventh valve 27 and a thirty pipeline 28, the water side inlet of the regenerative heater 4 is connected with the outlet of the condensate pump 5 through a ninth pipeline 17, a third valve 16, a tenth pipeline 15, a second valve 14 and an eleventh pipeline 13, the inlet of the condensate pump 5 is connected with the condenser 2 through a twelfth pipeline 12, a first valve 11 and a thirteenth pipeline 10, the water side outlet of the regenerative heater 4 is connected with a fourth pipeline 18, a fourth valve 19 and a fifth pipeline 20, the steam side inlet of the regenerative heater 4 is connected with the steam side inlet of the condenser 2 through a third pipeline 22, a thirteenth pipeline 11 and a thirteenth pipeline 10, A sixth valve 24 and a second pipeline 56 are connected with a middle-stage steam extraction port of the steam turbine 1, a drain outlet of the regenerative heater 4 is connected with the condenser 2 through an eighth pipeline 21, a fifth valve 23 and a seventh pipeline 25, an open circulating water supply port of the heat exchanger 7 is connected with a thirty-second pipeline 26 through a twenty-seventh pipeline 36, a ninth valve 34 and a twenty-eighth pipeline 32, an open circulating water return port of the heat exchanger 7 is connected with a thirty-third pipeline 29 through a twenty-sixth pipeline 37, a tenth valve 35 and a twenty-ninth pipeline 33, a closed circulating water inlet of the heat exchanger 7 is connected with a closed circulating water user through a twenty-fourteenth pipeline 38, an eleventh valve 39 and a twenty-second pipeline 40, a closed circulating water outlet of the heat exchanger 7 is connected with a closed circulating water user through a twenty-fifth pipeline 41, a twelfth valve 42 and a twenty-third pipeline 43, and a circulating water inlet of the absorption heat pump 6 is connected with a closed circulating water user through a, The fourteenth valve 47 and the twenty-first pipe 45 are connected to the twenty-second pipe 40, the closed circulating water outlet of the absorption heat pump 6 is connected to the twenty-third pipe 43 through the eighteenth pipe 48, the thirteenth valve 46 and the twentieth pipe 44, the condensed water inlet of the absorption heat pump 6 is connected to the eleventh pipe 13 through the sixteenth pipe 50, the fifteenth valve 52 and the fifteenth pipe 54, the condensed water outlet of the absorption heat pump 6 is connected to the tenth pipe 15 through the seventeenth pipe 51, the sixteenth valve 53 and the fourteenth pipe 55, the driving steam inlet of the absorption heat pump 6 is connected to the steam turbine 1 through the thirty-fifth pipe 59, the seventeenth valve 58 and the thirty-fourth pipe 57, and the drain outlet of the absorption heat pump 6 is connected to the condenser 2 through the thirty-seventeenth pipe 62, the eighteenth valve 61 and the thirty-sixth pipe 60.
In this embodiment, the absorption heat pump 6 uses heat released by the steam turbine and the user of the closed circulating water system to heat the condensed water, thereby realizing waste heat recovery.
In this embodiment, the absorption heat pump 6 is opened and closed by a valve, and the connection mode of the heat exchange system is changed, so that the free switching between the operation and the stop can be realized.
Referring to fig. 2 and 3, the operation method of the closed circulating water waste heat deep energy-saving comprehensive utilization and recovery system of the thermal power plant is as follows:
when the heat exchanger 7 is put into use, the thirteenth valve 46, the fourteenth valve 47, the fifteenth valve 52 and the sixteenth valve 53 are closed, the opening degrees of the ninth valve 34 and the tenth valve 35 are opened and adjusted, the opening degrees of the eleventh valve 39 and the twelfth valve 42 are adjusted, and the flow rate of open circulating water and the flow rate of closed circulating water entering the heat exchanger 7 are adjusted, so that the temperature of a user entering the closed circulating water is adjusted;
when the absorption heat pump 6 is put into use, the ninth valve 34, the tenth valve 35, the eleventh valve 39 and the twelfth valve 42 are closed, the opening degrees of the second valve 14, the fifteenth valve 52, the sixteenth valve 53, the seventeenth valve 58 and the eighteenth valve 61 are opened and adjusted, the opening degrees of the thirteenth valve 46 and the fourteenth valve 47 are adjusted, and the flow rate of the condensate water and the flow rate of the closed type circulating water entering the heat exchanger 7 are adjusted, so that the temperature adjustment of users of the condensate water and the closed type circulating water is realized.
In the specific operation method of this embodiment, when adjusting the flow rate flowing through each device, the opening degree of each valve is adjusted mainly by remotely transmitting the opening degree signal of the valve through the existing DCS system, so as to adjust the flow rate.
Those not described in detail in this specification are well within the skill of the art.
Although the present invention has been described with reference to the above embodiments, it should be understood that the scope of the present invention is not limited thereto, and that various changes and modifications can be made by those skilled in the art without departing from the spirit and scope of the present invention.
Claims (2)
1. The utility model provides an energy-conserving recycle system that synthesizes of closed circulating water waste heat degree of depth of thermal power plant which characterized in that: comprises a steam turbine (1), a condenser (2), a cooling tower (3), a regenerative heater (4), an absorption heat pump (6) and a heat exchanger (7); the steam inlet of the steam turbine (1) is connected with a first pipeline (8), the steam outlet of the steam turbine (1) is connected with a condenser (2) through a sixth pipeline (9), a circulating water supply port of the condenser (2) is connected with a cooling tower (3) through a thirteenth pipeline (29), an eighth valve (30) and an eleventh pipeline (31), a circulating water return port of the condenser (2) is connected with the cooling tower (3) through a twelfth pipeline (26), a seventh valve (27) and a thirtieth pipeline (28), a water side inlet of the regenerative heater (4) is connected with an outlet of a condensate pump (5) through a ninth pipeline (17), a third valve (16), a tenth pipeline (15), a second valve (14) and an eleventh pipeline (13), an inlet of the condensate pump (5) is connected with the condenser (2) through a twelfth pipeline (12), a first valve (11) and a thirteenth pipeline (10), a water side outlet of the regenerative heater (4) is connected with a fourth pipeline (18), a fourth valve (19) and a fifth pipeline (20), a steam side inlet of the regenerative heater (4) is connected with a middle-stage steam extraction port of the steam turbine (1) through a third pipeline (22), a sixth valve (24) and a second pipeline (56), a water drainage outlet of the regenerative heater (4) is connected with the condenser (2) through an eighth pipeline (21), a fifth valve (23) and a seventh pipeline (25), an open type circulating water supply port of the heat exchanger (7) is connected with a thirty-second pipeline (26) through a twenty-seventh pipeline (36), a ninth valve (34) and a twenty-eighth pipeline (32), an open type circulating water supply port of the heat exchanger (7) is connected with a thirty-third pipeline (29) through a twenty-sixth pipeline (37), a tenth valve (35) and a twenty-ninth pipeline (33), the closed circulating water inlet of the heat exchanger (7) is connected to a closed circulating water user through a twenty-fourth pipeline (38), an eleventh valve (39) and a twenty-second pipeline (40), the closed circulating water outlet of the heat exchanger (7) is connected to the closed circulating water user through a twenty-fifth pipeline (41), a twelfth valve (42) and a twenty-third pipeline (43), the closed circulating water inlet of the absorption heat pump (6) is connected to the twenty-second pipeline (40) through a nineteenth pipeline (49), a fourteenth valve (47) and a twenty-first pipeline (45), the closed circulating water outlet of the absorption heat pump (6) is connected to the twenty-third pipeline (43) through an eighteenth pipeline (48), a thirteenth valve (46) and a twentieth pipeline (44), and the condensed water inlet of the absorption heat pump (6) is connected to the twenty-third pipeline (43) through a sixteenth pipeline (50), A fifteenth valve (52) and a fifteenth pipeline (54) are connected to the eleventh pipeline (13), a condensed water outlet of the absorption heat pump (6) is connected to the tenth pipeline (15) through a seventeenth pipeline (51), a sixteenth valve (53) and a fourteenth pipeline (55), a driving steam inlet of the absorption heat pump (6) is connected to the steam turbine (1) through a thirty-fifth pipeline (59), a seventeenth valve (58) and a thirty-fourteenth pipeline (57), and a drain water outlet of the absorption heat pump (6) is connected to the condenser (2) through a thirty-seventeenth pipeline (62), an eighteenth valve (61) and a thirty-sixth pipeline (60).
2. The working method of the closed circulating water waste heat deep energy-saving comprehensive utilization and recovery system of the thermal power plant as claimed in claim 1 is characterized in that: the process is as follows:
when the heat exchanger (7) is put into use, the thirteenth valve (46), the fourteenth valve (47), the fifteenth valve (52) and the sixteenth valve (53) are closed, the opening degrees of the ninth valve (34) and the tenth valve (35) are opened and adjusted, the opening degrees of the eleventh valve (39) and the twelfth valve (42) are adjusted, and the flow rate of open circulating water and the flow rate of closed circulating water entering the heat exchanger (7) are adjusted, so that the temperature of a user entering the closed circulating water is adjusted;
when the absorption heat pump (6) is put into use, the ninth valve (34), the tenth valve (35), the eleventh valve (39) and the twelfth valve (42) are closed, the opening degrees of the second valve (14), the fifteenth valve (52), the sixteenth valve (53), the seventeenth valve (58) and the eighteenth valve (61) are opened and adjusted, the opening degrees of the thirteenth valve (46) and the fourteenth valve (47) are adjusted, and the flow rate of condensed water and the flow rate of closed circulating water entering the heat exchanger (7) are adjusted, so that the temperature of users entering the condensed water and the closed circulating water are adjusted.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010130630.6A CN111306597A (en) | 2020-02-28 | 2020-02-28 | Deep energy-saving comprehensive utilization and recovery system and method for closed circulating water waste heat of thermal power plant |
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| CN202010130630.6A CN111306597A (en) | 2020-02-28 | 2020-02-28 | Deep energy-saving comprehensive utilization and recovery system and method for closed circulating water waste heat of thermal power plant |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113137653A (en) * | 2021-04-02 | 2021-07-20 | 华电电力科学研究院有限公司 | System and method for improving heat supply flexibility of thermal power plant |
| CN113137652A (en) * | 2021-04-02 | 2021-07-20 | 华电电力科学研究院有限公司 | Deep energy-saving comprehensive utilization and recovery system and method for drainage waste heat of heat supply initial station |
| CN113623895A (en) * | 2021-07-01 | 2021-11-09 | 华电电力科学研究院有限公司 | Combined cooling heating and power system for cooling data center and control method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108036384A (en) * | 2017-12-31 | 2018-05-15 | 华电电力科学研究院 | A kind of energy source station system and operation method based on thermoelectricity unit steam extraction |
| CN109579108A (en) * | 2018-12-04 | 2019-04-05 | 华电电力科学研究院有限公司 | A kind of high back pressure coupling great temperature difference heat supply system and operation method for air cooling unit |
| CN212227173U (en) * | 2020-02-28 | 2020-12-25 | 华电电力科学研究院有限公司 | Energy-conserving recycle system that synthesizes of closed circulating water waste heat degree of depth of thermal power plant |
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2020
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108036384A (en) * | 2017-12-31 | 2018-05-15 | 华电电力科学研究院 | A kind of energy source station system and operation method based on thermoelectricity unit steam extraction |
| CN109579108A (en) * | 2018-12-04 | 2019-04-05 | 华电电力科学研究院有限公司 | A kind of high back pressure coupling great temperature difference heat supply system and operation method for air cooling unit |
| CN212227173U (en) * | 2020-02-28 | 2020-12-25 | 华电电力科学研究院有限公司 | Energy-conserving recycle system that synthesizes of closed circulating water waste heat degree of depth of thermal power plant |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113137653A (en) * | 2021-04-02 | 2021-07-20 | 华电电力科学研究院有限公司 | System and method for improving heat supply flexibility of thermal power plant |
| CN113137652A (en) * | 2021-04-02 | 2021-07-20 | 华电电力科学研究院有限公司 | Deep energy-saving comprehensive utilization and recovery system and method for drainage waste heat of heat supply initial station |
| CN113623895A (en) * | 2021-07-01 | 2021-11-09 | 华电电力科学研究院有限公司 | Combined cooling heating and power system for cooling data center and control method thereof |
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