CN112378120A - Heat recovery system and power supply system - Google Patents
Heat recovery system and power supply system Download PDFInfo
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- CN112378120A CN112378120A CN202011325310.2A CN202011325310A CN112378120A CN 112378120 A CN112378120 A CN 112378120A CN 202011325310 A CN202011325310 A CN 202011325310A CN 112378120 A CN112378120 A CN 112378120A
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- 238000011084 recovery Methods 0.000 title claims abstract description 52
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 175
- 238000001816 cooling Methods 0.000 claims abstract description 103
- 238000010521 absorption reaction Methods 0.000 claims abstract description 59
- 239000002918 waste heat Substances 0.000 claims abstract description 34
- 238000004891 communication Methods 0.000 claims description 19
- 239000002699 waste material Substances 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 description 34
- 230000007613 environmental effect Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B30/00—Heat pumps
- F25B30/04—Heat pumps of the sorption type
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- 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
-
- 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
- F01K11/00—Plants characterised by the engines being structurally combined with boilers or condensers
- F01K11/02—Plants characterised by the engines being structurally combined with boilers or condensers the engines being turbines
-
- 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
- F22—STEAM GENERATION
- F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
- F22D1/00—Feed-water heaters, i.e. economisers or like preheaters
- F22D1/003—Feed-water heater systems
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B30/00—Heat pumps
- F25B30/06—Heat pumps characterised by the source of low potential heat
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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
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/04—Arrangement or mounting of control or safety devices for sorption type machines, plants or systems
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28B—STEAM OR VAPOUR CONDENSERS
- F28B7/00—Combinations of two or more condensers, e.g. provision of reserve condenser
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28C—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA COME INTO DIRECT CONTACT WITHOUT CHEMICAL INTERACTION
- F28C1/00—Direct-contact trickle coolers, e.g. cooling towers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28C—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA COME INTO DIRECT CONTACT WITHOUT CHEMICAL INTERACTION
- F28C1/00—Direct-contact trickle coolers, e.g. cooling towers
- F28C2001/006—Systems comprising cooling towers, e.g. for recooling a cooling medium
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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]
- Y02B30/52—Heat recovery pumps, i.e. heat pump based systems or units able to transfer the thermal energy from one area of the premises or part of the facilities to a different one, improving the overall efficiency
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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)
- Sorption Type Refrigeration Machines (AREA)
Abstract
The invention discloses a heat recovery system and a power supply system, wherein the heat recovery system comprises a first condenser, a first cooling tower, an absorption heat pump, a first control valve and a second control valve, the first condenser is provided with a first water outlet and a first water return opening which are arranged at intervals, the first condenser is provided with a first pipeline extending from the first water outlet and a second pipeline communicated with the first pipeline, and the length of the second pipeline is greater than that of the first pipeline; one end of the first cooling tower is respectively communicated with one end of the first pipeline far away from the first water outlet and one end of the second pipeline far away from the first pipeline; the other end of the first cooling tower is communicated with a first water return port; the first control valve is arranged on the first pipeline and is positioned between the absorption heat pump and the first cooling tower; the second control valve is arranged on the second pipeline. The technical scheme of the invention aims to adjust the water temperature of the waste heat water entering the absorption heat pump so as to improve the heat efficiency of the absorption heat pump.
Description
Technical Field
The invention relates to the technical field of power supply equipment, in particular to a heat recovery system and a power supply system.
Background
The absorption heat pump technology is used for extracting heat from circulating water to supply heat, and is an important means for saving energy and reducing consumption of a thermal power plant. The generator set comprises a steam turbine, a condenser, an absorption heat pump and a boiler which are sequentially connected, the steam turbine, the condenser, the absorption heat pump and the boiler are sequentially connected, steam exhausted by the steam turbine is condensed into waste heat water by the condenser, and then the waste heat water enters the absorption heat pump to be used for heating boiler feed water in the boiler, so that the heat of the boiler for heating the boiler feed water is reduced, and the comprehensive efficiency of the generator set is improved. However, the energy-saving mode can be influenced by factors such as temperature changes in the initial cold period, the severe cold period and the final cold period of heat supply, steam turbine load and the like, so that the temperature change of waste hot water entering the heat pump is large, and the heat efficiency of the absorption heat pump is influenced.
Disclosure of Invention
The invention mainly aims to provide a heat recovery system and a power supply system, aiming at adjusting the temperature of waste heat water entering an absorption heat pump so as to improve the heat efficiency of the absorption heat pump.
To achieve the above object, the present invention provides a heat recovery system, including:
the first condenser is provided with a first water outlet and a first water return port which are arranged at intervals, the first condenser is provided with a first pipeline extending from the first water outlet and a second pipeline communicated with the first pipeline, and the length of the second pipeline is greater than that of the first pipeline;
one end of the first cooling tower is communicated with one end of the first pipeline far away from the first water outlet and one end of the second pipeline far away from the first pipeline respectively; the other end of the first cooling tower is communicated with the first water return port;
the two ends of the absorption heat pump are respectively communicated with the first pipeline and the first cooling tower;
the first control valve is arranged on the first pipeline and is positioned between the absorption heat pump and the first cooling tower; and
and the second control valve is arranged on the second pipeline.
In an embodiment, the heat recovery system further includes a second condenser, the second condenser has a second water outlet and a second water return port, the second condenser is provided with a third pipeline extending from the second water outlet, the third pipeline is communicated with the second pipeline, and the first cooling tower is communicated with the second water return port.
In one embodiment, the heat recovery system further comprises a second cooling tower connected to the second conduit and disposed adjacent to the first cooling tower.
In an embodiment, the heat recovery system further comprises a communication trench between the first cooling tower and the second cooling tower, and the communication trench is used for communicating the first cooling tower and the second cooling tower so as to level the water level of the first cooling tower with the water level of the second cooling tower.
In one embodiment, the heat recovery system further comprises a water level sensor disposed in the communication channel, and the water level sensor is used for detecting the water level in the communication channel.
In an embodiment, the heat recovery system further includes a fourth pipeline connected to the first pipeline, and a third control valve provided in the fourth pipeline, and an end of the fourth pipeline, which is far from the first pipeline, is communicated with the absorption heat pump.
In an embodiment, the first cooling tower comprises a first body and a first circulating pump connected with the first body, one end of the first circulating pump, which is far away from the first body, is communicated with the first water return port, and the first body is communicated with one end of the first pipeline, which is far away from the first water outlet.
In an embodiment, the heat recovery system further includes a first temperature sensor and a main controller, which are disposed on an outer wall of the absorption heat pump, the first temperature sensor is electrically connected to the main controller, and the first temperature sensor is configured to detect an ambient temperature, so that the main controller controls the opening and closing of the first control valve or the second control valve according to the ambient temperature.
In an embodiment, the heat recovery system further includes a second temperature sensor disposed at the first water outlet, the second temperature sensor is electrically connected to the main controller, and the second temperature sensor is configured to detect the water outlet temperature of the first condenser, so that the main controller controls the opening and closing of the first control valve or the second control valve according to the water outlet temperature of the first condenser.
The invention also provides a power supply system, which comprises a steam turbine, a boiler and the heat recovery system, wherein the steam turbine is connected with the first condenser of the heat recovery system, and the first condenser is used for condensing waste steam discharged by the steam turbine; and part of the absorption heat pump penetrates through the boiler so as to enable waste heat water in the absorption heat pump to exchange heat with boiler water in the boiler.
The heat recovery system comprises a first condenser, a first cooling tower, an absorption heat pump, a first control valve and a second control valve, wherein the first condenser is provided with a first water outlet and a first water return opening which are arranged at intervals; one end of the first cooling tower is respectively communicated with the first pipeline and the second pipeline; the other end of the first cooling tower is communicated with a first water return port; two ends of the absorption heat pump are respectively communicated with the first pipeline and the first cooling tower; the first control valve is arranged on the first pipeline, and the second control valve is arranged on the second pipeline; so set up, through the switching of the first control valve of control first pipeline and the second control valve of second pipeline to control the cooling flow path that waste heat water got into first cooling tower and the water yield of control waste heat water, make the waste heat hydroenergy of going out from first condenser obtain effectual temperature regulation, and then more adapt to the application of the absorption heat pump of different heating periods, thereby promote the thermal efficiency of absorption heat pump.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a schematic view of the heat recovery system of the present invention during an initial heating stage;
FIG. 2 is a schematic diagram of the heat recovery system of the present invention in the mid-heating stage;
fig. 3 is a schematic diagram of the heat recovery system of the present invention in a later stage of heating.
The reference numbers illustrate:
the implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.
In addition, the descriptions related to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
The invention provides a heat recovery system.
In an embodiment of the present invention, referring to fig. 1 to 3, the heat recovery system includes a first condenser 10, a first cooling tower 20, an absorption heat pump 30, a first control valve 40, and a second control valve 50, where the first condenser 10 has a first water outlet 10a and a first water return port 10b that are arranged at an interval, the first condenser 10 is provided with a first pipeline 11 extending from the first water outlet 10a and a second pipeline 12 communicating with the first pipeline 11, and a length of the second pipeline 12 is greater than a length of the first pipeline 11; one end of the first cooling tower 20 is communicated with one end of the first pipeline 11 far away from the first water outlet 10a, and one end of the first cooling tower 20 is communicated with one end of the second pipeline 12 far away from the first pipeline 11; the other end of the first cooling tower 20 is communicated with the first water return port 10 b; both ends of the absorption heat pump 30 are respectively communicated with the first pipeline 11 and the first cooling tower 20; a first control valve 40 is arranged on the first pipeline 11, and the first control valve 40 is positioned between the absorption heat pump 30 and the first cooling tower 20; a second control valve 50 is provided in the second conduit 12.
In this embodiment, the exhaust steam of the turbine is condensed into waste heat water by the first condenser 10 for reuse by the boiler, and vacuum can be established and maintained at the exhaust steam of the turbine. The first condenser functions as follows: water or air is used as a cooling working medium and is directly or indirectly contacted with steam, the steam is condensed into water, certain vacuum is established and maintained at a steam outlet of the steam turbine, the steam entering the steam turbine is expanded to the lowest cold end pressure, the ideal heat drop in the steam turbine is increased, and the circulating heat efficiency is improved. The structure of the steam device is a full-welding structure consisting of a shell, a water chamber, a tube plate, a cooling tube, an intermediate tube plate, a steam baffle plate, a collector and the like. The shell and the water chamber are welded into a whole, and the shell is of a steel plate welding structure. And the first condenser 10 is provided with a condensate pump at the water inlet and the water outlet of the cooling pipe, respectively, refer to the structure of the first condenser 10 in fig. 1 to 3.
The heat recovery system is provided with a heating initial stage, a heating middle stage and a heating later stage, wherein the heating initial stage, the heating middle stage and the heating later stage are distinguished according to the environmental temperature, namely the environmental temperature of the heating initial stage is higher than 0 ℃, the environmental temperature of the heating middle stage is lower than 0 ℃, and the environmental temperature of the heating later stage is lower than-8 ℃;
when the system is in the initial heating stage, the absorption heat pump 30 needs waste heat water with lower temperature; the first control valve 40 of the first pipeline 11 is opened, the second control valve 50 of the second pipeline 12 is closed, the residual hot water enters the first pipeline 11 from the first water outlet 10a of the first condenser 10, the residual hot water is divided into two parts in the first pipeline 11, one part enters the absorption heat pump 30, and the other part enters the first cooling tower 20; considering that the length of the first pipeline 11 is short, so that the amount of residual heat water entering the first cooling tower 20 is large, the first cooling tower 20 cools down a large amount of residual heat water, and re-enters the first condenser 10, at this time, the first control valve 40 is also closed, so that the cooled residual heat water re-enters the absorption heat pump 30, and further the large amount of cooled residual heat water and the uncooled residual heat water are mixed to form residual heat water with a lower temperature, thereby being more suitable for the heating temperature of the absorption heat pump 30 at the initial stage of heating;
when the heat pump is in the middle stage of heating, the absorption heat pump 30 needs waste heat water with proper temperature; the first control valve 40 of the first pipeline 11 is closed, the second control of the second pipeline 12 is opened, and the waste heat water flows through a part of the first pipeline 11 from the first water outlet 10a of the first condenser 10 and then respectively enters the second pipeline 12 and the absorption heat pump 30; considering that the length of the second pipeline 12 is long, under the condition of the same water flow speed, the residual heat water entering the first cooling tower 20 at the same time is less, and the residual heat water can also properly dissipate heat when the second pipeline 12 with the long length circulates, the first cooling tower 20 cools down the intermediate residual heat water and re-enters the first condenser 10, at this time, the second control valve 50 is also closed, so that the cooled residual heat water enters the absorption heat pump 30 again, and further the intermediate cooled residual heat water and the uncooled residual heat water are mixed to form residual heat water with proper temperature, so as to adapt to the heating temperature of the absorption heat pump 30 in the middle heating period;
in the later stage of heating, the absorption heat pump 30 needs waste heat water with higher temperature; the first control valve 40 of the first pipeline 11 and the second control valve 50 of the second pipeline 12 are both closed, the residual heat water flows through a part of the first pipeline 11 from the first water outlet 10a of the first condenser 10 and then completely enters the absorption heat pump 30, the residual heat water is not cooled by the first cooling tower 20, and the pipeline between the first water outlet 10a and the absorption heat pump 30 is shortest, so that the residual heat water is cooled to the minimum, and the heating temperature of the absorption heat pump 30 in the later heating period is adapted.
As can be seen from the above description, the opening and closing of the first control valve 40 of the first pipeline 11 and the second control valve 50 of the second pipeline 12 are controlled to control the cooling flow path of the waste heat water entering the first cooling tower 20 and the water amount of the waste heat water, so that the waste heat water exiting from the first condenser 10 can be effectively temperature-regulated, and further, the application of the absorption heat pumps 30 in different heating periods can be adapted, and the thermal efficiency of the absorption heat pumps 30 can be improved.
The heat recovery system comprises a first condenser 10, a first cooling tower 20, an absorption heat pump 30, a first control valve 40 and a second control valve 50, wherein the first condenser 10 is provided with a first water outlet 10a and a first water return port 10b which are arranged at intervals, the first condenser 10 is provided with a first pipeline 11 extending from the first water outlet 10a and a second pipeline 12 communicated with the first pipeline 11, and the length of the second pipeline 12 is greater than that of the first pipeline 11; one end of the first cooling tower 20 is respectively communicated with the first pipeline 11 and the second pipeline 12; the other end of the first cooling tower 20 is communicated with the first water return port 10 b; the two ends of the absorption heat pump 30 are respectively communicated with the first pipeline 11 and the first cooling tower 20; the first control valve 40 is arranged on the first pipeline 11, and the second control valve 50 is arranged on the second pipeline 12; so set up, through the switching of the first control valve 40 of control first pipeline 11 and the second control valve 50 of second pipeline 12 to control the cooling flow path that the waste heat water got into first cooling tower 20 and the water yield of control waste heat water, make the waste heat hydroenergy that goes out from first condenser 10 obtain effectual temperature regulation, and then more adapt to the application of the absorption heat pump 30 of different heating periods, thereby promote the thermal efficiency of absorption heat pump 30.
In an embodiment, referring to fig. 1 to 3, the heat recovery system further includes a second condenser 60, the second condenser 60 has a second water outlet 60a and a second water return 60b that are disposed at an interval, the second condenser 60 is provided with a third pipeline 61 extending from the second water outlet 60a, the third pipeline 61 is communicated with the second pipeline 12, and the first cooling tower 20 is communicated with the second water return 60 b.
In the present embodiment, by providing the second condenser 60 and the third pipeline 61, the amount of the residual heat water entering the second pipeline 12 and the first pipeline 11 can be increased, thereby increasing the heat supply amount of the absorption heat pump 30. And when being in the heating later stage or the heating middle stage, the ambient temperature is very low, forms the exhaust heat water through the heat transfer simultaneously of first condenser 10 and second condenser 60 to increase whole heat recovery system's bulk temperature, avoid first pipeline 11 and second pipeline 12 the condition of frosting or icing to appear.
In one embodiment, referring to fig. 1-3, the heat recovery system further includes a second cooling tower 70 connected to the second pipe 12 and disposed adjacent to the first cooling tower 20.
In this embodiment, one end of the second cooling tower 70 away from the second pipeline 12 is not communicated with the first water return port 10b of the first condenser 10 and the second water return port 60b of the second condenser 60; after the residual heat water enters the second pipeline 12, part of the residual heat water enters the second cooling tower 70 for cooling, and the rest of the residual heat water enters the first cooling tower 20 for cooling, so that the cooling speed of the residual heat water is increased, and the operating efficiency of the heat recovery system is improved.
A pipeline which is used for defining the communication between a second water return port 60b of the second condenser 60 and the first cooling tower 20 is a second water return pipeline which is communicated with the second pipeline 12, a pipeline which is used for defining the communication between a first water return port 10b of the first condenser 10 is a first water return pipeline, and the first water return pipeline is communicated with the second pipeline 12; a first water return communication door is arranged on the second pipeline 12; when the heat pump is in the middle heating period, after the residual heat water enters the first cooling tower 20 from the second pipeline 12, the first water return connection door is closed, so that the residual heat water returned by the first cooling tower 20 cannot enter the second pipeline 12 again, and the residual heat water can orderly return water from the first cooling tower 20 to the first condenser 10.
In an embodiment, referring to fig. 1 to 3, the heat recovery system further comprises a communication trench 80 between the first cooling tower 20 and the second cooling tower 70, wherein the communication trench 80 is used for communicating the first cooling tower 20 and the second cooling tower 70 so as to level the water level of the first cooling tower 20 with the water level of the second cooling tower 70.
In this embodiment, the first cooling tower 20 and the second cooling tower 70 form a siphon structure through the communication trench 80, and when the water level of the residual heat water entering the first cooling tower 20 is high, part of the residual heat water of the first cooling tower 20 enters the second cooling tower 70 to be cooled, so that the first cooling tower 20 and the second cooling tower 70 simultaneously cool down the same amount of residual heat water, and further, the cooling speed of the residual heat water is increased.
When the heating is in the middle stage, the first return interconnection door is closed, so that the first return pipeline and the second return pipeline form independent pipelines, and the waste heat water can respectively enter the first cooling tower 20 and the second cooling tower 70 through the second pipeline 12.
In one embodiment, referring to fig. 1 to 3, the heat recovery system further includes a water level sensor provided in the communication trench 80, and the water level sensor is used for detecting the water level in the communication trench 80. So set up, detect the waste heat water level in the contact ditch 80 when level sensor, send water level parameter to the master controller, and then can supply the master controller to calculate the waste heat water yield of first cooling tower 20 and the cooling of second cooling tower 70 according to water level parameter, further control the speed of the waste heat water that condenses of first condenser 10 and second condenser 60 to make whole heat recovery system's heat supply obtain effectual control.
In an embodiment, referring to fig. 1 to 3, the heat recovery system further includes a fourth pipeline 90 connected to the first pipeline 11 and a third control valve 100 disposed on the fourth pipeline 90, and an end of the fourth pipeline 90 away from the first pipeline 11 is communicated with the absorption heat pump 30.
In this embodiment, after the first water outlet 10a of the first condenser 10 and the second water outlet 60a of the second condenser 60 both stop to discharge water, and when the cooled waste heat water and the non-cooled waste heat water enter the absorption heat pump 30 through the fourth pipeline 90, or when all the non-cooled waste heat water enters the absorption heat pump 30 through the fourth pipeline 90, the third control valve 100 is controlled to close, so as to prevent the waste heat water from returning from the absorption heat pump 30 to the first pipeline 11 through the fourth pipeline 90, and thus the normal flow direction of the waste heat water is affected; the arrangement is such that the waste heat water orderly enters the first cooling tower 20 from the absorption heat pump 30 and flows back to the first condenser 10 and the second condenser 60.
In an embodiment, referring to fig. 1 to 3, the first cooling tower 20 includes a first body 21 and a first circulation pump 22 connected to the first body 21, an end of the first circulation pump 22 away from the first body 21 is communicated with the first water return port 10b, and the first body 21 is communicated with an end of the first pipeline 11 away from the first water outlet port 10 a.
In this embodiment, the flow speed of the residual heat water entering the first body 21 is increased by the first circulation pump 22, so as to increase the cooling speed of the first cooling tower 20 and increase the amount of residual heat water entering the first cooling tower 20; similarly, the second cooling tower 70 includes a second body and a second circulation pump connected to the second body, and the second body is communicated with the second pipeline 12.
In an embodiment, referring to fig. 1 to 3, the heat recovery system further includes a first temperature sensor and a main controller, which are disposed on an outer wall of the absorption heat pump 30, the first temperature sensor is electrically connected to the main controller, and the first temperature sensor is configured to detect an ambient temperature, so that the main controller controls opening and closing of the first control valve 40 or the second control valve 50 according to the ambient temperature.
In this embodiment, the ambient temperature is detected by the first temperature sensor, and the main controller can control the opening and closing of the first control valve 40 or the second control valve 50 according to the more accurate ambient temperature parameter, so as to control the heating amount of the heat recovery system more effectively.
In an embodiment, referring to fig. 1 to 3, the heat recovery system further includes a second temperature sensor disposed at the first water outlet 10a, the second temperature sensor is electrically connected to the main controller, and the second temperature sensor is configured to detect the water outlet temperature of the first condenser 10, so that the main controller controls the opening and closing of the first control valve 40 or the second control valve 50 according to the water outlet temperature of the first condenser 10.
In this embodiment, the second temperature sensor detects the outlet temperature of the first condenser 10, so that the main controller can control the opening and closing of the first control valve 40 or the second control valve 50 according to the more accurate outlet temperature parameter, thereby more effectively controlling the heating capacity of the heat recovery system.
The invention also provides a power supply system, referring to fig. 1 to 3, the power supply system comprises a steam turbine, a boiler and the heat recovery system, wherein the steam turbine is connected with the first condenser 10 of the heat recovery system, and the first condenser 10 is used for condensing waste steam discharged by the steam turbine; a part of the absorption heat pump 30 penetrates through the boiler to enable the waste heat water in the absorption heat pump 30 to exchange heat with the boiler water in the boiler, the specific structure of the heat recovery system refers to the above embodiments, and as the power supply system adopts all the technical schemes of all the above embodiments, the power supply system at least has all the beneficial effects brought by the technical schemes of the above embodiments, and details are not repeated herein.
In this embodiment, the temperature of the boiler heating boiler water is also different at different environmental temperatures, and the temperature of the waste heat water entering the absorption heat pump 30 is adjusted by cooling the first cooling tower 20 or the second cooling tower 70 of the heat recovery system in this embodiment, so as to adjust the heat exchange temperature of the boiler water heat exchange with the boiler, thereby the heat of the waste heat water of the absorption heat pump 30 can be completely transferred to the boiler water, the heat waste of the waste heat water is reduced, and the heat efficiency of the boiler heating boiler water 30 is improved.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A heat recovery system, characterized in that the heat recovery system comprises:
the first condenser is provided with a first water outlet and a first water return port which are arranged at intervals, a first pipeline extending from the first water outlet is communicated with a second pipeline of the first pipeline, and the length of the second pipeline is greater than that of the first pipeline;
one end of the first cooling tower is communicated with one end of the first pipeline far away from the first water outlet and one end of the second pipeline far away from the first pipeline respectively; the other end of the first cooling tower is communicated with the first water return port;
the two ends of the absorption heat pump are respectively communicated with the first pipeline and the first cooling tower;
the first control valve is arranged on the first pipeline and is positioned between the absorption heat pump and the first cooling tower; and
and the second control valve is arranged on the second pipeline.
2. The heat recovery system of claim 1 further comprising a second condenser having a second water outlet and a second water return spaced apart from the second condenser, the second condenser having a third conduit extending from the second water outlet, the third conduit communicating with the second conduit, and the first cooling tower communicating with the second water return.
3. The heat recovery system of claim 2 further comprising a second cooling tower connected to the second conduit, the second cooling tower being disposed adjacent the first cooling tower.
4. The heat recovery system of claim 3 further comprising a communication trench between the first cooling tower and the second cooling tower, the communication trench communicating the first cooling tower and the second cooling tower such that the water level of the first cooling tower is at the same level as the water level of the second cooling tower.
5. The heat recovery system of claim 4 further comprising a water level sensor in said communication channel for sensing the water level in said communication channel.
6. The heat recovery system of claim 1, further comprising a fourth pipeline connected to the first pipeline and a third control valve disposed in the fourth pipeline, wherein an end of the fourth pipeline remote from the first pipeline is in communication with the absorption heat pump.
7. The heat recovery system of claim 1 wherein the first cooling tower includes a first body and a first circulation pump connected to the first body, an end of the first circulation pump remote from the first body being in communication with the first return water port, and the first body being in communication with an end of the first conduit remote from the first water outlet port.
8. The heat recovery system according to any one of claims 1 to 7, further comprising a first temperature sensor and a main controller, the first temperature sensor being disposed on an outer wall of the absorption heat pump and electrically connected to the main controller, the first temperature sensor being configured to detect an ambient temperature, so that the main controller controls the opening and closing of the first control valve or the second control valve according to the ambient temperature.
9. The heat recovery system according to claim 8, further comprising a second temperature sensor disposed at the first water outlet, wherein the second temperature sensor is electrically connected to the main controller, and the second temperature sensor is configured to detect the water outlet temperature of the first condenser, so that the main controller controls the opening and closing of the first control valve or the second control valve according to the water outlet temperature of the first condenser.
10. A power supply system, characterized in that the power supply system comprises a steam turbine, a boiler and the heat recovery system according to any one of claims 1 to 9, the steam turbine is connected with the first condenser of the heat recovery system, and the first condenser is used for condensing waste steam discharged by the steam turbine; and part of the absorption heat pump penetrates through the boiler so as to enable waste heat water in the absorption heat pump to exchange heat with boiler water in the boiler.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011325310.2A CN112378120A (en) | 2020-11-23 | 2020-11-23 | Heat recovery system and power supply system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011325310.2A CN112378120A (en) | 2020-11-23 | 2020-11-23 | Heat recovery system and power supply system |
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| CN202066255U (en) * | 2011-05-20 | 2011-12-07 | 北京创时能源有限公司 | Circulating water waste heat recycling system and heat pump circulating water backwater pipeline system |
| CN202532586U (en) * | 2012-04-27 | 2012-11-14 | 北京华茂环能科技有限公司 | System for improving waste heat efficiency of heat pump recovery plant cooling tower |
| KR20130086397A (en) * | 2012-01-25 | 2013-08-02 | (주) 씨테크놀로지시스템 | The power efficiency improvement by using absorption heat pump in power plant system |
| CN105546618A (en) * | 2016-01-14 | 2016-05-04 | 大唐(北京)能源管理有限公司 | Heating system and heating method for gradient utilization for cold-end waste heat |
| CN213901546U (en) * | 2020-11-23 | 2021-08-06 | 沧州华润热电有限公司 | Heat recovery system and power supply system |
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| CN202066255U (en) * | 2011-05-20 | 2011-12-07 | 北京创时能源有限公司 | Circulating water waste heat recycling system and heat pump circulating water backwater pipeline system |
| KR20130086397A (en) * | 2012-01-25 | 2013-08-02 | (주) 씨테크놀로지시스템 | The power efficiency improvement by using absorption heat pump in power plant system |
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