CN111849712B - Hot water circulation system for biogas engineering and user heating and control method thereof - Google Patents
Hot water circulation system for biogas engineering and user heating and control method thereof Download PDFInfo
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 235
- 238000010438 heat treatment Methods 0.000 title claims abstract description 94
- 238000000034 method Methods 0.000 title claims abstract description 9
- 238000004321 preservation Methods 0.000 claims abstract description 35
- 239000007788 liquid Substances 0.000 claims description 43
- 239000008399 tap water Substances 0.000 claims description 16
- 235000020679 tap water Nutrition 0.000 claims description 16
- 238000004891 communication Methods 0.000 claims description 10
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims 1
- 238000000855 fermentation Methods 0.000 abstract description 11
- 230000004151 fermentation Effects 0.000 abstract description 10
- 230000001276 controlling effect Effects 0.000 description 12
- 230000001105 regulatory effect Effects 0.000 description 6
- 238000011161 development Methods 0.000 description 4
- 238000009413 insulation Methods 0.000 description 4
- 238000005457 optimization Methods 0.000 description 4
- 238000013461 design Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
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- 230000006978 adaptation Effects 0.000 description 1
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- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000008236 heating water Substances 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
- C12M21/00—Bioreactors or fermenters specially adapted for specific uses
- C12M21/04—Bioreactors or fermenters specially adapted for specific uses for producing gas, e.g. biogas
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
- C12M41/00—Means for regulation, monitoring, measurement or control, e.g. flow regulation
- C12M41/12—Means for regulation, monitoring, measurement or control, e.g. flow regulation of temperature
- C12M41/18—Heat exchange systems, e.g. heat jackets or outer envelopes
- C12M41/24—Heat exchange systems, e.g. heat jackets or outer envelopes inside the vessel
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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
- F24D19/1012—Arrangement or mounting of control or safety devices for water heating systems for central heating by regulating the speed of a pump
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- 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
- F24D3/005—Hot-water central heating systems combined with solar energy
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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
- 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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- 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
- Y02B10/00—Integration of renewable energy sources in buildings
- Y02B10/20—Solar thermal
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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
- Y02B10/00—Integration of renewable energy sources in buildings
- Y02B10/70—Hybrid systems, e.g. uninterruptible or back-up power supplies integrating renewable energies
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Abstract
The invention relates to a hot water circulation system for biogas engineering and user heating and a control method thereof, belonging to the field of intelligent control, wherein the hot water circulation system comprises a hot water supply system, a heating room, a reaction tank and a heat exchanger arranged in the reaction tank; the hot water supply system comprises a solar water heater, a heat preservation storage tank, a temperature adjustment tank, a cache tank, a controller and a power module; the solar water heater is communicated with the heat preservation storage tank, an electronic constant temperature water mixing valve is arranged on the temperature adjustment tank, and the heat preservation storage tank and the cache tank are respectively communicated with a hot water inlet end and a cold water inlet end of the electronic constant temperature water mixing valve; the temperature-adjusting tank is connected with the heating room, and the heat exchanger is connected with the cache tank in a storage way; the controller controls the delivery of hot or cold water in the various stages of pipes. The invention can maintain the fermentation temperature of the biogas engineering and accurately control the temperature of the heating system, thereby improving the utilization rate of the hot water resource, ensuring the fermentation speed and improving the biogas productivity.
Description
Technical Field
The invention belongs to the technical field of intelligent control, and particularly relates to a hot water circulation system for biogas engineering and user heating and a control method thereof.
Background
Along with the rapid development of Chinese economy, the demand for energy is increasingly enlarged, and the problem of energy shortage becomes an important problem affecting the rapid development of Chinese economy. Among a plurality of new energy sources, biogas is a clean and green energy source and has wide market and development space. In a biogas engineering system, the too low anaerobic fermentation temperature is a key factor for restricting the development of biogas engineering. Because the temperature is too low to restrict the activity of methane fermentation microorganisms, especially the methane yield is insufficient in winter, the use requirement of farmers is not met, and the methane engineering does not have stable gas supply guarantee. The research on the biogas engineering warming device with low price, excellent quality, environmental protection and practicability is very important. At present, the biogas engineering is heated mainly by adopting a spraying, air heating and water circulation heating mode, but the spraying, air heating and heating cost is higher, and compared with the water circulation heating mode, the water circulation heating mode generally adopts solar energy heating, so that the biogas engineering is relatively economical and cost-effective.
However, the accurate temperature control difficulty of solar water circulation heating is high, and the temperature in the reaction tank of the biogas engineering is unstable due to the fact that the temperature is influenced by weather, and the phenomena that the temperature in summer is extremely high, the biogas is extremely enhanced, the temperature in winter is not high, the gas yield improving effect is not obvious and the like are likely to occur. And the water circulation heating system of the prior biogas project is also generally connected with a heating system to recycle hot water resources, but the temperature control of the heating system also needs to be accurately controlled, and when the heating water inlet temperature continuously exceeds 60 ℃, the water inlet temperature is automatically regulated, so that the indoor dwelling temperature is kept. Therefore, an intelligent regulation and control system capable of maintaining the fermentation temperature of the biogas engineering and accurately controlling the temperature of a heating system linked with the biogas engineering is needed.
Disclosure of Invention
In order to solve the defects in the prior art, the invention aims at providing a hot water circulation system for biogas engineering and user heating and a control method of the hot water circulation system. Under the control of the control method, the hot water circulation system can ensure that the hot water resource can maintain the fermentation temperature of the biogas project and can accurately control the temperature of a heating system connected with the biogas project, thereby improving the utilization rate of the hot water resource, ensuring the fermentation speed and improving the biogas productivity.
In order to achieve the above purpose, the invention adopts the following specific scheme:
the hot water circulation system for biogas engineering and user heating comprises a hot water supply system, a heating room, a reaction tank and a heat exchanger arranged in the reaction tank; the hot water supply system is connected with the heating room through a first heat supply pipe, the heating room is connected with the heat exchanger through a second heat supply pipe, and the heat exchanger is communicated with the hot water supply system through a return pipe;
the hot water supply system comprises a solar water heater, a heat preservation storage tank, a temperature adjustment tank, a cache tank, a power module and a controller; the solar water heater is communicated with the heat preservation storage tank through a first conveying pipe, an electronic constant-temperature water mixing valve is arranged on the temperature adjustment tank, the heat preservation storage tank is communicated with the hot water inlet end of the electronic constant-temperature water mixing valve through a second conveying pipe, and the cache tank is communicated with the cold water inlet end of the electronic constant-temperature water mixing valve through a third conveying pipe; the heat exchanger is connected with the cache tank in a storage way through a return pipe, the cache tank is communicated with the heat preservation storage tank through a fourth conveying pipe, and the heat preservation storage tank is communicated with the water inlet end of the solar water heater through a fifth conveying pipe; hot water pumps are arranged on the first heating pipe, the first conveying pipe, the second conveying pipe and the fifth conveying pipe, cold water pumps are arranged on the third conveying pipe and the fourth conveying pipe, electromagnetic valves are arranged at water outlets of the hot water pumps and the cold water pumps, temperature sensors are arranged in the heat preservation storage tank, and liquid level sensors are arranged in the heat preservation storage tank and the temperature adjustment tank; the hot water pump, the cold water pump, the electromagnetic valve, the temperature sensor, the liquid level sensor and the electronic constant temperature water mixing valve are all connected with a controller, and the controller is connected with the power supply module.
As a further optimization of the scheme, a liquid level sensor is arranged in the buffer tank, the buffer tank is connected with a tap water pipe, and a cold water pump and an electromagnetic valve are arranged on the tap water pipe.
As a further optimization to the scheme, the heating room comprises a heating room water outlet and a heating room water inlet, wherein the heating room water outlet is connected with a heating system water inlet end of a farmer, the heating room water inlet is connected with a heating system water outlet end, and the heating room water inlet is connected with a second heating pipe.
As a further optimization of the scheme, the hot water circulation system further comprises a wireless communication module and a remote control terminal, wherein the wireless communication module is connected with the controller, and the remote control terminal is connected with the wireless communication module. Further, the remote control terminal is a PC or a smart phone.
As a further optimization of the above solution, the heat exchanger adopts a coil heat exchanger, and the coil heat exchanger is provided with an outwardly convex spherical structure.
The invention also provides a control method of the hot water circulation system, which comprises the following steps:
s1, controlling a hot water pump and an electromagnetic valve on a first conveying pipe to work through a controller, and conveying hot water heated to more than 80 ℃ by a solar water heater to a heat preservation storage tank for storage through the first conveying pipe;
s2, respectively controlling a hot water pump and an electromagnetic valve on a second conveying pipe, a cold water pump and an electromagnetic valve on a third conveying pipe and an electronic constant temperature water mixing valve to work through a controller, respectively conveying hot water in a heat preservation storage tank and cold water in a buffer tank to the electronic constant temperature water mixing valve, mixing the cold water and the hot water to 60 ℃ by the electronic constant temperature water mixing valve, then conveying the cold water and the hot water to a temperature regulating tank, and simultaneously controlling a liquid level sensor to detect the liquid level height in the temperature regulating tank by the controller, wherein after the liquid level height reaches a set value, the hot water pump and the electromagnetic valve on the second conveying pipe, the cold water pump and the electromagnetic valve on the third conveying pipe and the electronic constant temperature water mixing valve stop working;
s3, controlling a hot water pump and an electromagnetic valve on the first heating pipe to work through a controller, conveying hot water in the temperature-adjusting tank to a heating room for heating, conveying the hot water after passing through the heating room to a heat exchanger for heat exchange with materials in the reaction tank, and conveying the heat-exchanged water back to the buffer tank for storage through a return pipe;
s4, controlling a liquid level sensor to detect the liquid level height in the heat preservation storage tank through a controller, controlling a cold water pump and an electromagnetic valve on a fourth conveying pipe to work through the controller when the liquid level height is lower than a set value, conveying cold water in a buffer tank to the heat preservation storage tank, and stopping the cold water pump and the electromagnetic valve on the fourth conveying pipe after the liquid level height reaches the set value; meanwhile, a liquid level sensor is controlled by a controller to detect the liquid level height in the buffer tank, when the liquid level height is lower than a set value, the cold water pump and the electromagnetic valve on the tap water pipe are controlled by the controller to work, tap water is conveyed to the buffer tank, and after the liquid level height reaches the set value, the cold water pump and the electromagnetic valve on the tap water pipe stop working;
s5, controlling a temperature sensor to detect the temperature in the heat preservation storage tank through a controller, controlling a hot water pump and an electromagnetic valve on a fifth conveying pipe to work when the temperature is lower than 80 ℃, conveying water in the heat preservation storage tank to a solar water heater for heating, and repeating the steps S1 to S5.
The beneficial effects are that:
1. the invention can ensure that the hot water resource can maintain the fermentation temperature of the biogas engineering and accurately control the temperature of the heating system linked with the biogas engineering, thereby improving the utilization rate of the hot water resource, ensuring the fermentation speed and improving the biogas productivity.
2. The invention can automatically realize the water supplement of the heating circulation system, ensure the continuous operation of the water circulation, reduce the manual operation and lead the whole system to be more intelligent.
3. The invention can also heat farmers through the heating house, circularly utilize hot water resources and improve the utilization rate of heat and water resources.
Drawings
FIG. 1 is a schematic view of the apparatus of the hot water circulation system according to the present invention;
FIG. 2 is a schematic diagram of a control system of the present invention;
in the figure: 1. heating a room; 2. a reaction tank; 3. a heat exchanger; 4. a first heat supply pipe; 5. a second heat supply pipe; 6. a return pipe; 7. a solar water heater; 8. a thermal insulation storage tank; 9. a temperature regulating tank; 10. a cache tank; 11. a power module; 12. a controller; 13. a first delivery tube; 14. electronic constant temperature water mixing valve; 15. a second delivery tube; 16. a third delivery tube; 17. a fourth conveying pipe; 18. a fifth conveying pipe; 19. a hot water pump; 20. a cold water pump; 21. an electromagnetic valve; 22. a temperature sensor; 23. a liquid level sensor; 24. a tap water pipe; 25. a wireless communication module; 26. and (5) remotely controlling the terminal.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below in connection with the embodiments of the present invention.
Example 1:
the hot water circulation system for biogas engineering and user heating as shown in fig. 1 comprises a hot water supply system, a heating room 1, a reaction tank 2 and a heat exchanger 3 arranged in the reaction tank 2, wherein the hot water supply system conveys hot water to the heating room 1 through a first heat supply pipe 4, the heating room 1 conveys hot water to the heat exchanger 3 through a second heat supply pipe 5, the hot water enters the heat exchanger 3 to exchange heat with materials in the reaction tank 2, and the heat exchanger 3 conveys heat exchanged water back to the hot water supply system through a return pipe 6.
The hot water supply system comprises a solar water heater 7, a heat preservation storage tank 8, a temperature adjustment tank 9, a cache tank 10, a power supply module and a controller; the solar water heater 7 conveys hot water to the heat preservation storage tank 8 for storage through the first conveying pipe 13, the electronic constant temperature water mixing valve 14 is arranged on the temperature adjustment tank 9, the heat preservation storage tank 8 is communicated with the hot water inlet end of the electronic constant temperature water mixing valve 14 through the second conveying pipe 15, and the buffer tank 10 is communicated with the cold water inlet end of the electronic constant temperature water mixing valve 14 through the third conveying pipe 16; the temperature-regulating tank 9 conveys hot water to the heating room 1 through the first heating pipe 4, the heat exchanger 3 conveys heat-exchanged water back to the buffer tank 10 through the return pipe 6 for storage, the buffer tank 10 is communicated with the heat-preserving storage tank 8 through the fourth conveying pipe 17, and the heat-preserving storage tank 8 is communicated with the water inlet end of the solar water heater 7 through the fifth conveying pipe 18; the controller 12 is connected with the power module 11, and the electronic constant temperature water mixing valve 14 is connected with the controller 12; the first heating pipe 4, the first conveying pipe 13, the second conveying pipe 15 and the fifth conveying pipe 18 are provided with hot water pumps 19, the third conveying pipe 16 and the fourth conveying pipe 17 are provided with cold water pumps 20, the water outlets of the hot water pumps 19 and the cold water pumps 20 are provided with electromagnetic valves 21, the heat preservation storage tank 8 is internally provided with temperature sensors 22, the heat preservation storage tank 8 and the temperature adjustment tank 9 are internally provided with liquid level sensors 23, and the hot water pumps 19, the cold water pumps 20, the electromagnetic valves 21, the temperature sensors 22 and the liquid level sensors 23 are all connected with the controller 12.
The heating room 1 is internally provided with a heating room water outlet and a heating room water inlet, the heating room water outlet is connected with a heating system water inlet end of a farmer to heat the farmer, and after hot water heating, the hot water flows out from a heating system water outlet end and then flows into a heating room water inlet connected with the heating system water outlet end, and the heating room water inlet is connected with a second heating pipe 5 to be used for heating the reaction tank 2, so that circulation is formed.
The liquid level sensor 23 is arranged in the buffer tank 10, the buffer tank 10 is connected with a tap water pipe 24, the tap water pipe 24 is provided with a cold water pump 20 and an electromagnetic valve 21, the electromagnetic valve 21 is arranged at a water outlet of the cold water pump 20, and the cold water pump 20 and the electromagnetic valve 21 are connected with the controller 12. The design can automatically realize water supplement of the heating circulation system, so that the whole system is more intelligent.
The intelligent control system further comprises a wireless communication module 25 and a remote control terminal 26, wherein the wireless communication module 25 is connected with the controller 12, and the remote control terminal 26 is connected with the wireless communication module 25. The remote control terminal 26 can pay attention to and record the temperature in the reaction tank 2 at any time, monitor the fermentation temperature and ensure that the fermentation is performed efficiently.
The remote control terminal 25 is a PC computer or a smart phone. The PC computer or the intelligent mobile phone can more intuitively and effectively record and monitor and record the temperature in the reaction tank.
The heat exchanger 3 adopts a coil pipe heat exchanger, and the coil pipe heat exchanger is provided with a spherical structure which protrudes outwards. The design can effectively increase the heat exchange area of the heat exchanger 3 and the materials, so that the materials are heated more fully, the overall reaction rate can be effectively improved, and the biogas yield is improved.
The control method of the hot water circulation system comprises the following steps:
s1, a controller 12 controls a hot water pump 19 and an electromagnetic valve 21 on a first conveying pipe 13 to work, and hot water heated to more than 80 ℃ by a solar water heater 7 is conveyed to a thermal insulation storage tank 8 for storage through the first conveying pipe 13;
s2, the controller 12 controls the hot water pump 19 and the electromagnetic valve 21 on the second conveying pipe 15, the cold water pump 19 and the electromagnetic valve 21 on the third conveying pipe 16 and the electronic constant temperature water mixing valve 14 to work, hot water in the heat preservation storage tank 8 and cold water in the buffer tank 10 are respectively conveyed to the electronic constant temperature water mixing valve 14, the electronic constant temperature water mixing valve 14 mixes the cold water and the hot water to 60 ℃ and then conveyed to the temperature regulating tank 9, meanwhile, the controller 12 controls the liquid level sensor 23 to detect the liquid level height in the temperature regulating tank 9, and when the liquid level height reaches a set value, the hot water pump 19 and the electromagnetic valve 21 on the second conveying pipe 15, the cold water pump 19 and the electromagnetic valve 21 on the third conveying pipe 16 and the electronic constant temperature water mixing valve 14 stop working;
s3, the controller 12 controls the hot water pump 19 and the electromagnetic valve 21 on the first heating pipe 4 to work, hot water in the temperature-adjusting tank 9 is conveyed to the heating room 1 for heating, hot water after passing through the heating room 1 is conveyed to the heat exchanger 3 for heat exchange with materials in the reaction tank 2, and the heat exchanged water is conveyed back to the buffer tank 10 for storage through the return pipe 6;
s4, the controller 12 controls the liquid level sensor 23 to detect the liquid level in the heat preservation storage tank 8, when the liquid level is lower than a set value, the controller 12 controls the cold water pump 19 and the electromagnetic valve 21 on the fourth conveying pipe 17 to work, cold water in the buffer tank 10 is conveyed to the heat preservation storage tank 8, after the liquid level reaches the set value, the cold water pump 19 and the electromagnetic valve 21 on the fourth conveying pipe 17 stop working, meanwhile, the controller 12 controls the liquid level sensor 23 to detect the liquid level in the buffer tank 10, when the liquid level is lower than the set value, the controller 12 controls the cold water pump 20 and the electromagnetic valve 21 on the tap water pipe 24 to work, and tap water is conveyed to the buffer tank 10, and after the liquid level reaches the set value, the cold water pump 20 and the electromagnetic valve 21 on the tap water pipe 24 stop working;
and S5, controlling a temperature sensor 22 to detect the temperature in the thermal insulation storage tank 8 by the controller 12, controlling a hot water pump 19 and an electromagnetic valve 21 on the fifth conveying pipe 18 to work when the temperature is lower than 80 ℃, conveying water in the thermal insulation storage tank 8 to the solar water heater 7 for heating, and repeating the steps S1 to S5.
It should be noted that the above-mentioned embodiments are to be understood as illustrative, and not limiting, the scope of the invention, which is defined by the appended claims. It will be apparent to those skilled in the art that various modifications and adaptations can be made to the present invention without departing from its spirit or scope.
Claims (6)
1. A hot water circulation system for marsh gas engineering and user's heating, its characterized in that: comprises a hot water supply system, a heating room (1), a reaction tank (2) and a heat exchanger (3) arranged in the reaction tank (2); the hot water supply system is connected with the heating room (1) through a first heat supply pipe (4), the heating room (1) is connected with the heat exchanger (3) through a second heat supply pipe (5), and the heat exchanger (3) is communicated with the hot water supply system through a return pipe (6);
the hot water supply system comprises a solar water heater (7), a heat preservation storage tank (8), a temperature adjustment tank (9), a cache tank (10), a power module and a controller; the solar water heater (7) is communicated with the heat preservation storage tank (8) through a first conveying pipe (13), an electronic constant temperature water mixing valve (14) is arranged on the temperature adjustment tank (9), the heat preservation storage tank (8) is communicated with a hot water inlet end of the electronic constant temperature water mixing valve (14) through a second conveying pipe (15), and the cache tank (10) is communicated with a cold water inlet end of the electronic constant temperature water mixing valve (14) through a third conveying pipe (16); the temperature-adjusting tank (9) is connected with the heating room (1) through a first heat supply pipe (4), the heat exchanger (3) is in storage connection with the cache tank (10) through a return pipe (6), the cache tank (10) is communicated with the heat-preserving storage tank (8) through a fourth conveying pipe (17), and the heat-preserving storage tank (8) is communicated with the water inlet end of the solar water heater (7) through a fifth conveying pipe (18); hot water pumps are arranged on the first heating pipe (4), the first conveying pipe (13), the second conveying pipe (15) and the fifth conveying pipe (18), cold water pumps are arranged on the third conveying pipe (16) and the fourth conveying pipe (17), and electromagnetic valves are arranged at water outlets of the hot water pumps and the cold water pumps; a temperature sensor is arranged in the heat preservation storage tank (8), and liquid level sensors are arranged in the heat preservation storage tank (8) and the temperature adjustment tank (9); the hot water pump, the cold water pump, the electromagnetic valve, the temperature sensor, the liquid level sensor and the electronic constant temperature water mixing valve (14) are all connected with a controller, and the controller is connected with the power supply module;
the hot water circulation system is controlled by adopting a method comprising the following steps:
s1, controlling a hot water pump and an electromagnetic valve on a first conveying pipe (13) to work through a controller, and conveying hot water heated to more than 80 ℃ by a solar water heater (7) to a heat preservation storage tank (8) for storage through the first conveying pipe (13);
s2, respectively controlling a hot water pump and an electromagnetic valve on a second conveying pipe (15), a cold water pump and an electromagnetic valve on a third conveying pipe (16) and an electronic constant temperature water mixing valve (14) to work through a controller, respectively conveying hot water in a heat preservation storage tank (8) and cold water in a buffer tank (10) to the electronic constant temperature water mixing valve (14), mixing the cold water and the hot water to 60 ℃ by the electronic constant temperature water mixing valve (14) and then conveying the mixture to a temperature-regulating tank (9), and simultaneously controlling a liquid level sensor to detect the liquid level height in the temperature-regulating tank (9), wherein after the liquid level height reaches a set value, the hot water pump and the electromagnetic valve on the second conveying pipe (15), the cold water pump and the electromagnetic valve on the third conveying pipe (16) and the electronic constant temperature water mixing valve (14) stop working;
s3, controlling a hot water pump and an electromagnetic valve on the first heating pipe (4) to work through a controller, conveying hot water in the temperature-adjusting tank (9) to a heating room (1) for heating, conveying the hot water after passing through the heating room (1) to a heat exchanger (3) for heat exchange with materials in the reaction tank (2), and conveying the water after heat exchange to a cache tank (10) for storage through a return pipe (6);
s4, controlling a liquid level sensor to detect the liquid level height in the heat preservation storage tank (8) through a controller, controlling a cold water pump and an electromagnetic valve on a fourth conveying pipe (17) to work through the controller when the liquid level height is lower than a set value, conveying cold water in a buffer tank (10) to the heat preservation storage tank (8), and stopping the cold water pump and the electromagnetic valve on the fourth conveying pipe (17) after the liquid level height reaches the set value; simultaneously, a liquid level sensor is controlled by a controller to detect the liquid level in the cache tank (10), when the liquid level is lower than a set value, the controller is used for controlling a cold water pump and an electromagnetic valve on a tap water pipe (24) to work, tap water is conveyed to the cache tank (10), and after the liquid level reaches the set value, the cold water pump and the electromagnetic valve on the tap water pipe (24) stop working;
s5, controlling a temperature sensor to detect the temperature in the heat preservation storage tank (8) through a controller, controlling a hot water pump and an electromagnetic valve on a fifth conveying pipe (18) to work when the temperature is lower than 80 ℃, conveying water in the heat preservation storage tank (8) to a solar water heater (7) for heating, and repeating the steps S1 to S5.
2. The hot water circulation system for biogas engineering and user heating of claim 1, wherein: the liquid level sensor is installed in the buffer tank (10), the buffer tank (10) is connected with a tap water pipe (24), and a cold water pump and an electromagnetic valve are arranged on the tap water pipe (24).
3. The hot water circulation system for biogas engineering and user heating of claim 1, wherein: the heating room (1) is internally provided with a heating room water outlet and a heating room water inlet, the heating room water outlet is connected with a heating system water inlet end of a farmer, the heating room water inlet is connected with a heating system water outlet end, and the heating room water inlet is connected with a second heating pipe (5).
4. The hot water circulation system for biogas engineering and user heating of claim 1, wherein: the hot water circulation system further comprises a wireless communication module and a remote control terminal, wherein the wireless communication module is connected with the controller, and the remote control terminal is connected with the wireless communication module.
5. The hot water circulation system for biogas engineering and user heating of claim 4, wherein: the remote control terminal is a PC or a smart phone.
6. The hot water circulation system for biogas engineering and user heating of claim 1, wherein: the heat exchanger (3) adopts a coiled pipe heat exchanger, and the coiled pipe heat exchanger is provided with a spherical structure protruding outwards.
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