CN111592981A - Biogas fermentation pond heat preservation device based on clean energy multipotency is complementary - Google Patents
Biogas fermentation pond heat preservation device based on clean energy multipotency is complementary Download PDFInfo
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- 238000000855 fermentation Methods 0.000 title claims abstract description 56
- 230000004151 fermentation Effects 0.000 title claims abstract description 55
- 238000004321 preservation Methods 0.000 title claims abstract description 35
- 230000000295 complement effect Effects 0.000 title description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 255
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 82
- 238000005338 heat storage Methods 0.000 claims description 65
- 238000003860 storage Methods 0.000 claims description 13
- 238000000746 purification Methods 0.000 claims description 8
- 238000005259 measurement Methods 0.000 claims description 2
- 239000002028 Biomass Substances 0.000 abstract description 7
- 230000007547 defect Effects 0.000 abstract description 3
- 230000007613 environmental effect Effects 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 239000003507 refrigerant Substances 0.000 description 8
- 238000002485 combustion reaction Methods 0.000 description 7
- 238000010438 heat treatment Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 230000005855 radiation Effects 0.000 description 3
- 238000012546 transfer Methods 0.000 description 3
- 238000009529 body temperature measurement Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 239000006096 absorbing agent Substances 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 210000003608 fece Anatomy 0.000 description 1
- 230000035558 fertility Effects 0.000 description 1
- 239000003337 fertilizer Substances 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 244000144972 livestock Species 0.000 description 1
- 239000010871 livestock manure Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 244000144977 poultry Species 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000010902 straw Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 238000003911 water pollution 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
- C12M23/00—Constructional details, e.g. recesses, hinges
- C12M23/02—Form or structure of the vessel
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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
- C12M23/00—Constructional details, e.g. recesses, hinges
- C12M23/36—Means for collection or storage of gas; Gas holders
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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
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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
- C12M47/00—Means for after-treatment of the produced biomass or of the fermentation or metabolic products, e.g. storage of biomass
- C12M47/18—Gas cleaning, e.g. scrubbers; Separation of different gases
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel
Abstract
The invention provides a biogas fermentation tank heat preservation device based on clean energy multi-energy complementation, which consists of hot water pipes wound on the periphery of a biogas fermentation tank, wherein hot water in the hot water pipes comes from a biogas water heater subsystem, a solar heat collection subsystem and an air source heat pump subsystem which are connected in parallel. The invention has the advantages that: the biogas fermentation tank heat preservation device based on the complementation of clean energy and multiple energies effectively utilizes clean energy such as solar energy, biomass energy, air heat energy and the like with abundant reserves through the complementarity of space and time, reduces the use of high-grade energy such as electric energy and the like, and meets the requirement of environmental protection; overcomes the defects of solar energy intermittency and instability, biomass energy low density and air heat energy seasonality, skillfully realizes the uninterrupted heat preservation of the biogas fermentation tank, provides powerful guarantee for ensuring the continuous normal and stable operation of biogas engineering all the year round, and greatly improves the gas production rate.
Description
Technical Field
The invention belongs to the technical field of heat preservation of fermentation tanks in biogas engineering, and particularly relates to a heat preservation device of a biogas fermentation tank based on multifunctional complementation of clean energy.
Background
With the increasing tension of petrochemical fuels, the increasing severity of environmental pollution problems, and the increasing severity of ecological system constraints, the importance of developing and utilizing clean energy has been recognized. Biogas fermentation is a good way for high-level utilization of biomass energy, is a mode of changing waste into valuables and turning harm into good, and is an effective measure for improving the heating problem of buildings in villages and small towns. The construction and the use of the biogas project effectively avoid the environmental problems of air pollution, underground water pollution and the like caused by unreasonable combustion of straws and random stacking of livestock and poultry manure, and also reduce the dependence of heating in villages and towns on fossil fuels. The products of the biogas engineering include biogas, biogas slurry and biogas residues. Wherein the biogas can be used for cogeneration, the biogas slurry can be used as green fertilizer, and the biogas residues can be returned to the field to improve the fertility of the soil.
However, the popularization and application of the biogas engineering also have great difficulty, for example, in severe cold areas such as northwest and northeast of China, the outdoor temperature is as low as minus 30 ℃, and the optimal fermentation temperature of the biogas is between 30 and 31 ℃. On one hand, if no heating and heat preservation measures are taken for the biogas fermentation liquid, the temperature required by anaerobic fermentation cannot be ensured, so that the biogas fermentation period is long, the gas production rate is low, and the raw materials are degraded slowly. On the other hand, the biogas (fermentation) pool is the core part of the biogas project, if the heating and heat preservation technical measures are not good, the biogas (fermentation) pool will be frozen and scrapped in severe cold weather, so that most domestic biogas projects are difficult to realize continuous normal operation all year round.
In order to solve the above problems, the current measures mainly taken at home and abroad include using a Combined Heat and Power (CHP) as a heating system to heat a biogas fermentation device while generating electricity so as to improve the gas yield of biogas; the central jacket is used for exchanging heat of the solar heating methane tank, the central jacket is arranged in the methane tank, and the solar heat collector heats water and then circulates into the jacket to indirectly heat the methane tank and the like. But the CHP method has higher cost, is only suitable for an ultra-large methane tank with the purpose of generating electricity and is not suitable for a small methane fermentation tank; the methane fermentation tank heated by adopting a central sleeve heat exchange method has the problems of poor stability and influence by seasons, weather and day and night.
Therefore, the development of a biogas fermentation tank heat preservation device which is stable and reliable in operation and can improve the biogas yield is urgently needed.
Disclosure of Invention
In order to make up for the defects of the prior art, the invention provides a methane fermentation tank heat preservation device based on clean energy multi-energy complementation, which is a methane fermentation tank heat preservation device based on solar energy-air-biomass energy coupling complementation and can stably and reliably preserve heat of a methane fermentation tank in a severe cold area, thereby not only avoiding frost cracking and scrapping of the methane fermentation tank, but also improving the gas yield of the methane fermentation tank.
The invention provides a biogas fermentation tank heat preservation device based on clean energy multi-energy complementation, which consists of hot water pipes wound on the periphery of a biogas fermentation tank, wherein hot water in the hot water pipes comes from a biogas water heater subsystem, a solar heat collection subsystem and an air source heat pump subsystem which are connected in parallel;
the solar heat collection subsystem comprises a vacuum tube solar water heater, a third circulating water pump, a fourth circulating water pump, a third valve, a fourth valve, a third temperature measuring device, a fourth temperature measuring device, a third flow measuring device and a fourth flow measuring device, the air source heat pump subsystem comprises a heat storage water tank II, a capillary tube, an air heat exchanger, a compressor, a fifth circulating water pump, a sixth circulating water pump, a fifth valve, a sixth valve, a fifth temperature measuring device, a sixth temperature measuring device, a fifth flow measuring device and a sixth flow measuring device, and the biogas water heater subsystem and the solar heat collection subsystem share the heat storage water tank I, The system comprises a No. seven circulating water pump, a No. seven valve, a No. seven temperature measuring device and a No. seven flow measuring device;
the gas storage device, the methane pump, the methane purification device and the methane water heater are connected through a methane pipeline; the biogas water heater is communicated with the heat storage water tank I through a first inlet pipe and a first outlet pipe, wherein the first temperature measuring device, the first circulating water pump, the first valve, the first flow measuring device and the second flow measuring device are sequentially arranged on the first inlet pipe from the biogas water heater end to the first heat storage water tank end, and the second temperature measuring device, the second circulating water pump, the second valve and the second flow measuring device are sequentially arranged on the first outlet pipe from the first heat storage water tank end to the biogas water heater end;
the vacuum tube solar water heater is communicated with the heat storage water tank I through a second inlet tube and a second outlet tube, wherein the third temperature measuring device, the third circulating water pump, the third valve and the third flow measuring device are sequentially arranged on the second inlet tube from the end of the vacuum tube solar water heater to the end of the heat storage water tank I, and the fourth temperature measuring device, the fourth circulating water pump, the fourth valve and the fourth flow measuring device are sequentially arranged on the second outlet tube from the end of the heat storage water tank I to the end of the vacuum tube solar water heater;
the air heat exchanger is connected with the heat storage water tank II through the capillary tube, and the compressor is arranged between the air heat exchanger and the heat storage water tank II;
the heat storage water tank I is communicated with a hot water pipe wound on the periphery of the biogas fermentation pool through a first water inlet pipe and a first water outlet pipe, and a seventh temperature measuring device, a seventh circulating water pump, a seventh valve and a seventh flow measuring device are sequentially arranged on the first water outlet pipe from the end of the hot water pipe to the end of the heat storage water tank I; the heat storage water tank II is communicated with a hot water pipe wound on the periphery of the biogas fermentation pool through a second water inlet pipe and a second water outlet pipe, a fifth temperature measuring device, a fifth circulating water pump, a fifth valve and a fifth flow measuring device are sequentially arranged on the second water inlet pipe from the end of the hot water tank II to the end of the hot water pipe, and a sixth temperature measuring device, a sixth circulating water pump, a sixth valve and a sixth flow measuring device are sequentially arranged on the second water outlet pipe from the end of the hot water pipe to the end of the hot water tank II.
Furthermore, heat exchange coil pipes are arranged in the heat storage water tank I and the heat storage water tank II.
Further, the gas storage device is communicated with the biogas fermentation tank through a pipeline, and a control valve and an eighth flow measurement device are arranged on the pipeline.
Furthermore, the valves of the methane water heater subsystem, the solar heat collection subsystem and the air source heat pump subsystem are independently or jointly opened according to actual needs, so that heat is supplied by one subsystem, or heat is supplied by any two subsystems, or heat is supplied by three subsystems simultaneously.
Furthermore, hot water in the heat storage water tank I and the heat storage water tank II can be used for heat preservation of the biogas fermentation tank and can be supplied for other purposes, so that the heat requirements of other purposes are met.
The invention has the advantages that:
the methane fermentation tank heat preservation device based on the complementation of clean energy and multiple energies effectively utilizes clean energy such as solar energy, biomass energy, air heat energy and the like with abundant reserves through the complementarity of space and time, reduces the use of high-grade energy such as electric energy and the like, and meets the requirement of environmental protection;
the methane fermentation tank heat preservation device based on the clean energy multi-energy complementation overcomes the defects of solar energy intermittence and instability, biomass energy low density and air heat energy seasonality through the complementarity of space and time, skillfully realizes the uninterrupted heat preservation of the methane fermentation tank, and provides a powerful guarantee for ensuring the continuous normal operation of methane engineering all the year round;
the methane fermentation tank heat preservation device based on the multifunctional complementation of clean energy not only can ensure the safe and stable operation of methane engineering all the year round (particularly in winter in severe cold areas), but also greatly improves the gas yield;
the heat preservation device of the biogas fermentation tank based on the clean energy multi-energy complementation can realize that biomass energy, solar energy and air energy can respectively or randomly supply heat to the biogas fermentation tank at the same time by opening valves of each subsystem independently or jointly;
the methane fermentation tank heat preservation device based on the multifunctional complementation of clean energy can supply hot water in the heat storage water tank I and the heat storage water tank II to other users in seasons with high temperature (heat preservation for the methane fermentation tank is not needed) such as summer, late spring, early autumn and the like, so as to meet the heat demand of other users.
Drawings
Fig. 1 is a schematic structural diagram of a biogas fermentation tank heat preservation device based on clean energy multi-energy complementation in embodiment 1 of the present invention.
The meaning of the reference symbols in the figures: 1-a biogas fermentation pool, 2-a gas storage bag, 3-a biogas pump, 4-a biogas purification device, 5-a biogas water heater, 6-a heat storage water tank I, 7-a vacuum tube solar water heater, 8-a heat storage water tank II, 9-a capillary tube, 10-an air heat exchanger, 11-a compressor, 12-a fifth circulating water pump, 13-a sixth circulating water pump, 14-a circulating water pump, 15-a second circulating water pump, 16-a third circulating water pump, 17-a fourth circulating water pump, 18-a fifth valve, 19-a sixth valve, 20-a control valve, 21-a first valve, 22-a second valve, 23-a third valve, 24-a fourth valve, 25-a fifth temperature measurement device and 26-a sixth temperature measurement device, 27-a first temperature measuring device, 28-a second temperature measuring device, 29-a third temperature measuring device, 30-a fourth temperature measuring device, 31-a fifth flow measuring device, 32-a sixth flow measuring device, 33-a first flow measuring device, 34-a second flow measuring device, 35-a third flow measuring device, 36-a fourth flow measuring device, 37-a seventh temperature measuring device and 38-a seventh circulating water pump; 39-valve number seven; no. 40-seven flow measuring device.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention are clearly and completely described, and it is obvious that the described embodiments are a part of the embodiments of the present invention, but 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.
Example 1
As shown in figure 1, the heat preservation device for the biogas fermentation tank based on the clean energy multi-energy complementation is composed of hot water pipes wound on the periphery of the biogas fermentation tank 1, and hot water in the hot water pipes is from a biogas water heater subsystem, a solar heat collection subsystem and an air source heat pump subsystem which are connected in parallel.
The biogas water heater subsystem comprises a gas storage device 2, a biogas pump 3, a biogas purification device 4, a biogas water heater 5, a first circulating water pump 14, a second circulating water pump 15, a first valve 21, a second valve 22, a first temperature measuring device 27, a second temperature measuring device 28, a first flow measuring device 33 and a second flow measuring device 34, the solar heat collecting subsystem comprises a vacuum tube solar water heater 7, a third circulating water pump 16, a fourth circulating water pump 17, a third valve 23, a fourth valve 24, a third temperature measuring device 29, a fourth temperature measuring device 30, a third flow measuring device 35 and a fourth flow measuring device 36, the air source heat pump subsystem comprises a heat storage water tank II 8, a capillary tube 9, an air heat exchanger 10, a compressor 11, a fifth circulating water pump 12, a sixth circulating water pump 13, a fifth valve 18, a sixth valve 19, a fifth temperature measuring device 25 and a sixth temperature measuring device 26, The biogas water heater subsystem and the solar heat collection subsystem share a heat storage water tank I6, a seventh circulating water pump 38, a seventh valve 39, a seventh temperature measuring device 37 and a seventh flow measuring device 40; and heat exchange coil pipes are arranged in the heat storage water tank I6 and the heat storage water tank II 8.
The gas storage device 2, the methane pump 3, the methane purification device 4 and the methane water heater 5 are connected through a methane pipeline; the gas storage device 2 is communicated with the biogas fermentation tank 1 through a pipeline, and the pipeline is provided with a control valve 20 and an eighth flow measuring device. The biogas water heater 5 is communicated with the heat storage water tank I6 through an inlet pipe and an outlet pipe, wherein a temperature measuring device 27, a circulating water pump 14, a valve 21, a flow measuring device 33 and a flow measuring device 34 are sequentially arranged on the inlet pipe from the biogas water heater 5 end to the heat storage water tank I6 end, and a temperature measuring device 28, a circulating water pump 15, a valve 22 and a flow measuring device 34 are sequentially arranged on the outlet pipe from the heat storage water tank I6 end to the biogas water heater 5 end.
The vacuum tube solar water heater 7 is communicated with the heat storage water tank I6 through a second inlet tube and a second outlet tube, wherein a third temperature measuring device 29, a third circulating water pump 16, a third valve 23 and a third flow measuring device 35 are sequentially arranged on the second inlet tube from the end of the vacuum tube solar water heater 7 to the end of the heat storage water tank I6, and a fourth temperature measuring device 30, a fourth circulating water pump 17, a fourth valve 24 and a fourth flow measuring device 36 are sequentially arranged on the second outlet tube from the end of the heat storage water tank I6 to the end of the vacuum tube solar water heater 7.
The air heat exchanger 10 and the heat storage water tank II 8 are connected through a capillary tube 9, and a compressor 11 is arranged between the air heat exchanger 10 and the heat storage water tank II 8.
The heat storage water tank I6 is communicated with a hot water pipe wound on the periphery of the biogas fermentation tank 1 through a first water inlet pipe and a first water outlet pipe, and a seventh temperature measuring device 37, a seventh circulating water pump 38, a seventh valve 39 and a seventh flow measuring device 40 are sequentially arranged on the first water outlet pipe from the end of the hot water pipe to the end of the heat storage water tank I6; the heat storage water tank II 8 is communicated with a hot water pipe wound on the periphery of the biogas fermentation tank 1 through a second water inlet pipe and a second water outlet pipe, a fifth temperature measuring device 25, a fifth circulating water pump 12, a fifth valve 18 and a fifth flow measuring device 31 are sequentially arranged on the second water inlet pipe from the end of the hot water tank II 8 to the end of the hot water pipe, and a sixth temperature measuring device 26, a sixth circulating water pump 13, a sixth valve 19 and a sixth flow measuring device 32 are sequentially arranged on the second water outlet pipe from the end of the hot water pipe to the end of the hot water tank II 8.
The biogas water heater subsystem, the solar heat collection subsystem and the air source heat pump subsystem independently or jointly open valves of the subsystems according to actual needs to realize heat supply by one subsystem, or heat supply by any two subsystems, or heat supply by three subsystems simultaneously, and the specific working process is as follows:
operation in air source heat pump subsystem mode
The air source heat pump subsystem completes energy transfer through a capillary tube 9 (which is a throttling device and in which refrigerant is depressurized), an air heat exchanger 10 (which is equivalent to a heat absorber of the heat pump and absorbs heat from low-temperature heat source air), a compressor 11 (which is used for compressing refrigerant), and a condenser (which is a heat exchanger and is a heat release end of the refrigerant and transfers heat released in the process of condensing the refrigerant to water in a heat storage water tank II 8) consisting of water in the heat storage water tank II 8 and a heat exchange coil.
When the heat preservation device operates in an air source heat pump subsystem mode, the fifth valve 18 and the sixth valve 19 are opened, the rest valves are closed, the fifth circulating water pump 12 and the sixth circulating water pump 13 are opened for operation, at the moment, a refrigerant passes through a heat exchange coil in the air heat exchanger 10 in the circulation process, namely, low-temperature low-pressure refrigerant liquid coming out of the capillary tube 9 is evaporated only by absorbing heat in air, and then is compressed by the compressor 11 and then transfers the heat to water in the heat storage water tank II 8 through the heat exchange coil. This mode requires operation at higher air temperatures.
(II) running in a solar heat collecting subsystem mode
When the heat preservation device operates in a solar heat collection subsystem mode, the third valve 23, the fourth valve 24 and the seventh valve 39 are opened, the rest valves are closed, the third circulating water pump 16, the fourth circulating water pump 17 and the seventh circulating water pump 38 are opened for operation, and at the moment, the vacuum tube solar water heater 7 stores the collected solar radiation heat in the hot water in the heat storage water tank I6. This mode needs to be operated under the working condition that sufficient sun radiation amount exists in the clear day.
(III) running in a biogas water heater subsystem mode
When the subsystem of the heat preservation device biogas water heater operates in a mode, the first valve 21, the second valve 22 and the seventh valve 39 are opened, the rest valves are closed, the first circulating water pump 14, the second circulating water pump 15 and the seventh circulating water pump 38 are opened for operation, at the moment, biogas in the gas storage bag 2 is sent to the biogas purification device 4 through the biogas pump 3 for purification treatment, enters the biogas water heater 5 for combustion, and heat generated by combustion is input into hot water in the heat storage water tank I6. The mode generally operates under the working conditions of insufficient solar energy irradiation and low air temperature, and mainly depends on the combustion of the biogas in the gas storage bag 2.
(IV) the solar heat collection subsystem and the air source heat pump subsystem are operated in a complementary mode
When the heat preservation device operates in a complementary mode of a solar heat collection subsystem and an air source heat pump subsystem, the valves of the fifth valve 18, the sixth valve 19, the third valve 23, the fourth valve 24 and the seventh valve 39 are opened, the rest valves are closed, and the fifth circulating water pump 12, the sixth circulating water pump 13, the third circulating water pump 16, the fourth circulating water pump 17 and the seventh circulating water pump 38 are opened to operate; at the moment, the biogas fermentation tank 1 simultaneously utilizes the solar energy and the air energy converted by the solar heat collecting subsystem and the air source heat pump subsystem. The mode can be operated under the working condition of relatively low air temperature, and when the refrigerant on the air side can not absorb enough heat, the heat is supplemented by the solar energy stored in the hot water in the heat storage water tank I6, so that the heat supply requirement is met.
(V) the solar heat collection subsystem and the methane water heater subsystem are operated in a complementary mode
When the heat preservation device operates in a complementary mode of a solar heat collection subsystem and a methane water heater subsystem, the first valve 21, the second valve 22, the third valve 23, the fourth valve 24 and the seventh valve 39 are opened, the rest valves are closed, the first circulating water pump 14, the second circulating water pump 15, the third circulating water pump 16, the fourth circulating water pump 17 and the seventh circulating water pump 38 are opened for operation, and the solar heat collection subsystem and the methane water heater subsystem simultaneously input solar heat and methane combustion heat into the heat storage water tank I6. The mode is operated under the working condition that the air temperature is very low and the air source heat pump subsystem can hardly absorb heat from the air, so that the weather is clear and enough methane storage amount is required in the daytime.
(VI) the biogas water heater subsystem-air source heat pump subsystem are operated in a complementary mode
When the heat preservation device operates in a complementary mode of a biogas water heater subsystem and an air source heat pump subsystem, the fifth valve 18, the sixth valve 19, the first valve 21, the second valve 22 and the seventh valve 39 are opened, the rest valves are closed, the fifth circulating water pump 12, the sixth circulating water pump 13, the first circulating water pump 14, the second circulating water pump 15 and the seventh circulating water pump 38 are opened, the biogas water heater 5 is opened, the biogas water heater 5 inputs heat generated by biogas combustion into the heat storage water tank I6, and the air source heat pump subsystem inputs air energy into the heat storage water tank II 8. The mode can be operated under the working condition of relatively low air temperature, and when the refrigerant on the air side can not absorb enough air heat, the heat is supplemented by the biological energy stored in the hot water in the heat storage water tank II 8, so that the heat supply requirement is met.
(VII) the solar heat collection subsystem-methane water heater subsystem-air source heat pump subsystem are operated in a complementary mode
When the heat preservation device runs in a complementary mode of a solar heat collection subsystem, a methane water heater subsystem and an air source heat pump subsystem, all valves and circulating water pumps are opened, so that the solar heat collection subsystem, the methane water heater subsystem and the air source heat pump subsystem can simultaneously input solar radiation heat, methane combustion heat and air energy into a heat storage water tank. The mode has low requirements on air temperature, solar energy guarantee rate and methane storage amount, and is an operation mode with the widest application range.
It should be understood that the above-described specific embodiments are merely illustrative of the present invention and are not intended to limit the present invention. Obvious variations or modifications which are within the spirit of the invention are possible within the scope of the invention.
Claims (5)
1. The heat preservation device for the biogas fermentation tank based on the clean energy multi-energy complementation is characterized by comprising a hot water pipe wound on the periphery of the biogas fermentation tank (1), wherein hot water in the hot water pipe is from a biogas water heater subsystem, a solar heat collection subsystem and an air source heat pump subsystem which are connected in parallel;
the biogas water heater subsystem comprises a gas storage device (2), a biogas pump (3), a biogas purification device (4), a biogas water heater (5), a first circulating water pump (14), a second circulating water pump (15), a first valve (21), a second valve (22), a first temperature measuring device (27), a second temperature measuring device (28), a first flow measuring device (33) and a second flow measuring device (34), the solar heat collecting subsystem comprises a vacuum tube solar water heater (7), a third circulating water pump (16), a fourth circulating water pump (17), a third valve (23), a fourth valve (24), a third temperature measuring device (29), a fourth temperature measuring device (30), a third flow measuring device (35) and a fourth flow measuring device (36), and the air source heat pump subsystem comprises a heat storage water tank II (8), a capillary tube (9), an air heat exchanger (10), a heat storage water tank (8), a capillary tube (9), an air heat exchanger (10), a heat exchanger, The system comprises a compressor (11), a fifth circulating water pump (12), a sixth circulating water pump (13), a fifth valve (18), a sixth valve (19), a fifth temperature measuring device (25), a sixth temperature measuring device (26), a fifth flow measuring device (31) and a sixth flow measuring device (32), wherein the biogas water heater subsystem and the solar heat collecting subsystem share a heat storage water tank I (6), a seventh circulating water pump (38), a seventh valve (39), a seventh temperature measuring device (37) and a seventh flow measuring device (40);
the gas storage device (2), the methane pump (3), the methane purification device (4) and the methane water heater (5) are connected through a methane pipeline; the biogas water heater (5) is communicated with the heat storage water tank I (6) through a first inlet pipe and a first outlet pipe, wherein the first temperature measuring device (27), the first circulating water pump (14), the first valve (21), the first flow measuring device (33) and the second flow measuring device (34) are sequentially arranged on the first inlet pipe from the biogas water heater (5) end to the heat storage water tank I (6) end, and the second temperature measuring device (28), the second circulating water pump (15), the second valve (22) and the second flow measuring device (34) are sequentially arranged on the first outlet pipe from the heat storage water tank I (6) end to the biogas water heater (5) end;
the vacuum tube solar water heater (7) is communicated with the heat storage water tank I (6) through a second inlet tube and a second outlet tube, wherein the third temperature measuring device (29), the third circulating water pump (16), the third valve (23) and the third flow measuring device (35) are sequentially arranged on the second inlet tube from the end of the vacuum tube solar water heater (7) to the end of the heat storage water tank I (6), and the fourth temperature measuring device (30), the fourth circulating water pump (17), the fourth valve (24) and the fourth flow measuring device (36) are sequentially arranged on the second outlet tube from the end of the heat storage water tank I (6) to the end of the vacuum tube solar water heater (7);
the air heat exchanger (10) is connected with the heat storage water tank II (8) through the capillary tube (9), and the compressor (11) is arranged between the air heat exchanger (10) and the heat storage water tank II (8);
the heat storage water tank I (6) is communicated with a hot water pipe wound on the periphery of the biogas fermentation tank (1) through a first water inlet pipe and a first water outlet pipe, and a seventh temperature measuring device (37), a seventh circulating water pump (38), a seventh valve (39) and a seventh flow measuring device (40) are sequentially arranged on the first water outlet pipe from the end of the hot water pipe to the end of the heat storage water tank I (6); the heat storage water tank II (8) is communicated with a hot water pipe which is wound on the periphery of the biogas fermentation tank (1) through a second water inlet pipe and a second water outlet pipe, a fifth temperature measuring device (25), a fifth circulating water pump (12), a fifth valve (18) and a fifth flow measuring device (31) are sequentially arranged on the second water inlet pipe from the end of the hot water tank II (8) to the end of the hot water pipe, and a sixth temperature measuring device (26), a sixth circulating water pump (13), a sixth valve (19) and a sixth flow measuring device (32) are sequentially arranged on the second water outlet pipe from the end of the hot water pipe to the end of the hot water tank II (8).
2. The biogas fermentation tank heat preservation device based on clean energy multi-energy complementation as claimed in claim 1, wherein the heat storage water tank I (6) and the heat storage water tank II (8) are both provided with heat exchange coils.
3. The biogas fermentation tank heat preservation device based on the clean energy multipotency complementation as claimed in claim 1, wherein the gas storage device (2) is communicated with the biogas fermentation tank (1) through a pipeline, and the pipeline is provided with a control valve (20) and an eight-gauge flow measurement device.
4. The biogas fermentation tank heat preservation device based on the clean energy multi-energy complementation as claimed in claim 1, wherein the biogas water heater subsystem, the solar heat collection subsystem and the air source heat pump subsystem are independently or jointly opened with valves of the subsystems according to actual needs, so that heat is supplied by one subsystem, or heat is supplied by any two subsystems, or heat is supplied by three subsystems simultaneously.
5. The biogas fermentation tank heat preservation device based on the clean energy multi-energy complementation as claimed in claim 1, wherein the hot water in the heat storage water tank I (6) and the heat storage water tank II (8) can not only preserve the heat of the biogas fermentation tank, but also can be supplied for other uses to meet the heat requirement of other uses.
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