CN114719326B - Distributed solar energy-concentrated methane coupling heat supply system and method - Google Patents
Distributed solar energy-concentrated methane coupling heat supply system and method Download PDFInfo
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- CN114719326B CN114719326B CN202210403823.3A CN202210403823A CN114719326B CN 114719326 B CN114719326 B CN 114719326B CN 202210403823 A CN202210403823 A CN 202210403823A CN 114719326 B CN114719326 B CN 114719326B
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- 238000000034 method Methods 0.000 title claims abstract description 12
- 230000008878 coupling Effects 0.000 title claims abstract description 11
- 238000010168 coupling process Methods 0.000 title claims abstract description 11
- 238000005859 coupling reaction Methods 0.000 title claims abstract description 11
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims description 46
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 144
- 238000010438 heat treatment Methods 0.000 claims abstract description 102
- 238000000855 fermentation Methods 0.000 claims abstract description 67
- 239000002918 waste heat Substances 0.000 claims abstract description 28
- 238000011084 recovery Methods 0.000 claims abstract description 14
- 230000000087 stabilizing effect Effects 0.000 claims abstract description 3
- 239000000463 material Substances 0.000 claims description 87
- 238000005338 heat storage Methods 0.000 claims description 34
- 239000007789 gas Substances 0.000 claims description 14
- 230000005540 biological transmission Effects 0.000 claims description 8
- 239000013589 supplement Substances 0.000 claims description 3
- 239000008400 supply water Substances 0.000 claims 1
- 230000004151 fermentation Effects 0.000 abstract description 5
- 230000001502 supplementing effect Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000003345 natural gas Substances 0.000 description 2
- 230000002457 bidirectional effect Effects 0.000 description 1
- 239000003034 coal gas Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D15/00—Other domestic- or space-heating systems
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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
- C12M23/36—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
- C12M43/00—Combinations of bioreactors or fermenters with other apparatus
- C12M43/04—Bioreactors or fermenters combined with combustion devices or plants, e.g. for carbon dioxide removal
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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
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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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S10/00—Solar heat collectors using working fluids
- F24S10/30—Solar heat collectors using working fluids with means for exchanging heat between two or more working fluids
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S20/00—Solar heat collectors specially adapted for particular uses or environments
- F24S20/40—Solar heat collectors combined with other heat sources, e.g. using electrical heating or heat from ambient air
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S50/00—Arrangements for controlling solar heat collectors
- F24S50/40—Arrangements for controlling solar heat collectors responsive to temperature
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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
- F24D2200/00—Heat sources or energy sources
- F24D2200/14—Solar energy
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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
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Abstract
The invention discloses a distributed solar energy-concentrated biogas coupling heat supply system and a method, comprising a biogas system, a waste heat recovery system, a distributed solar heat collector and a standby heat source; the biogas system is used for producing biogas through anaerobic fermentation; the waste heat recovery system is used for recovering waste heat of the independent solar heat collector and waste heat of the concentrated heat source; the distributed solar heat collector is used for providing hot water for heating user heating equipment; the standby heat source is used for stabilizing the water supply temperature and guaranteeing the heat demand of households. The invention utilizes idle building roofs in rural areas to collect solar heat, the collected heat is used for heating a centralized biogas fermentation system and heating a farmer heating system, and biogas generated by the centralized biogas fermentation system is used for supplementing heat for periods of insufficient solar energy supply.
Description
Technical Field
The invention relates to the technical field of renewable energy heat supply, in particular to a distributed solar energy-concentrated biogas coupling heat supply system and a method.
Background
The traditional household coal-fired heating mode causes serious pollution to the atmospheric environment, so clean energy heating modes such as coal gas conversion, coal electricity conversion, solar heating and the like are generated, the natural gas heating system is generally high in operation cost and higher than the coal-fired system, and the natural gas heating system is difficult to popularize and popularize in vast rural areas. The coal-to-electricity mode adopts a standby heat source and a ground source heat pump to replace a coal-fired boiler for heating, belongs to clean energy equipment, but generally has higher initial investment of heat pump heating and has certain difficulty in popularization in rural areas. In addition, the heating efficiency of the heat pump system is obviously reduced under the condition of low ambient temperature, and the operation cannot be guaranteed. Solar heating belongs to clean and efficient energy utilization equipment, but single solar equipment cannot guarantee heating requirements in continuous rainy and snowy days
The rural area has abundant biological raw materials for producing methane, but the methane production performance of a methane system is greatly influenced by the environmental temperature, the temperature fluctuation in one hour is usually not more than 2 ℃, the temperature is increased and decreased by 5 ℃ in a short time, the methane yield is obviously reduced, and if the temperature fluctuation is too large, the methane production can be stopped even. It is also difficult to achieve stable heating with a single biogas boiler system. In order to ensure that the temperature in the biogas tank is maintained at about 35 ℃, the biogas tank is heated by adopting gas, coal, electric heating and other modes, but the method is at the cost of sacrificing high-grade energy.
It can be seen that the inherent properties of solar heat collection and biogas fermentation make it difficult for a single technology to stably and continuously supply heat as a heating source.
Disclosure of Invention
In order to overcome the technical problems, the invention aims to provide a distributed solar energy-concentrated biogas coupling heat supply system and a method, wherein the system utilizes idle building roofs in rural areas to collect solar energy, the collected heat is used for heating a concentrated biogas fermentation system and heating a farmer heating system, and biogas generated by the concentrated biogas fermentation system is used for supplementing solar energy insufficient supply period heat. Thereby being used for solving the problem of unstable heat supply of single solar energy and methane heat source.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
A distributed solar energy-concentrated biogas coupling heat supply system comprises a biogas system 4, a waste heat recovery system, a distributed solar heat collector 22 and a standby heat source 3;
the biogas system 4 is used for producing biogas by anaerobic fermentation;
the waste heat recovery system is used for recovering waste heat of the distributed solar heat collector 22 and waste heat of the centralized heat source;
The distributed solar collector 22 is used for providing hot water to a hot user heating device 23;
The standby heat source 3 is used for stabilizing the water supply temperature and guaranteeing the heat demand of households.
The biogas system 4 is connected with the biogas tank 1 through the gas transmission pipeline 6, the biogas tank 1 transmits biogas to the biogas boiler 2 through the gas transmission pipeline 6, a water supply and return pipeline branch of the biogas boiler 2 is connected with the anaerobic fermentation material shell-and-tube heat exchanger 4-2 in the biogas system 4 so as to realize waste heat recovery and anaerobic fermentation material preheating, a long-distance transmission heat supply pipeline water supply pipe 17 and a heat supply pipeline water return pipe 18 are respectively connected with the user heating equipment 23 and the plate heat exchanger 21, and the distributed solar heat collector 22 is respectively connected with the user heating equipment 23 and the plate heat exchanger 21.
The water supply and return pipeline of the biogas boiler 2 and the water supply and return pipeline of the standby heat source 3 are arranged in parallel when the heat requirements of the heat users cannot be met.
The biogas system 4 comprises a material pretreatment device 4-3, wherein the output end of the material pretreatment device 4-3 is connected with the c port of the anaerobic fermentation material shell-and-tube heat exchanger 4-2 through a material pump 4-6, the a port output end of the anaerobic fermentation material shell-and-tube heat exchanger 4-2 is connected with the anaerobic fermentation tank 4-1, and biogas generated by the anaerobic fermentation tank 4-1 is communicated with the biogas tank 1 through a gas pipe 6.
The waste heat recovery system comprises a heat storage water tank 22-7 at a household end, hot water flows from the heat storage water tank 22-7 at the household end to the plate heat exchanger 21 for heat exchange when the waste heat at the household end starts to be recovered, hot water is converged into a water supply and return main pipe through a circulating pump five 26 at each heat user end, and finally flows into a port b from a port d of the anaerobic fermentation material shell-and-tube heat exchanger 4-2 to heat materials;
When the waste heat of the solar heat collector at the heat user side is insufficient or insufficient to meet the heat demand, the heating hot water of the biogas boiler 2 is shunted from the heating hot water of the biogas boiler 2 to the anaerobic fermentation material shell-and-tube heat exchanger 4-2 through the biogas boiler heating circulating water pump 8 to heat anaerobic fermentation materials.
The b-port line of the anaerobic fermentation material shell-and-tube heat exchanger 4-2 is provided with a temperature detector 4-7, and the d-port line of the anaerobic fermentation material shell-and-tube heat exchanger 4-2 is provided with a temperature detector 4-8.
The distributed solar heat collection system comprises a solar heat collector 22-2, a plate heat exchanger 22-5, a heat storage water tank 22-7 and a circulating water pump 22-4, wherein a water outlet of the circulating water pump 22-4 is connected with a water inlet of the solar heat collector 22-2, a water inlet of the circulating water pump 22-6 is connected with a water outlet of the plate heat exchanger 22-5, a water outlet of the solar heat collector 22-2 is connected with a water inlet of the plate heat exchanger 22-5 to form a solar heat collection closed loop, water in the heat storage water tank 22-7 flows through the plate heat exchanger 21 through the circulating water pump 22-12 to form a tail end waste heat recovery closed loop, and hot water in the heat storage water tank 22-7 flows into an indoor radiator 23-3 through the circulating water pump 22-8 to supply heat.
The auxiliary heat source system comprises a standby heat source 3, hot water prepared by the standby heat source 3 flows into a heat supply pipeline water supply pipe 17 and a heat supply pipeline water return pipe 18 through a standby heat source circulating water pump 12 to supplement heat, and the standby heat source circulating water pump 12 is arranged on the heat supply and return pipe.
The heat storage water tank 22-7 is provided with a temperature detector 22-11.
An operation method of a distributed solar energy-concentrated biogas coupling heat supply system comprises the following steps;
mode one: distributed solar direct heating and solar waste heat heating biogas material mode
When the temperature detected by the temperature detector 22-11 of the tail end heat storage water tank 22-7 is higher than 50 ℃, the temperature detected by the temperature detector 4-8 is between 35 ℃ and 40 ℃, the flow rate of the material pump 4-6 is reduced, the gate valves 4-5, 4-4, 14, 15, 22-1, 22-3, 22-9, 22-10, 22-13, 22-14, 24 and 25 are opened, the gate valves 5, 7, 9, 10, 11, 13, 23-4, 23-5, 27 and 28 are closed, the circulation pumps 4-6, 22-4, 22-6, 22-8 and 26 are operated, the circulation pumps six 8,12 and 23-2 are stopped, when the temperature detected by the temperature detector 22-11 of the tail end heat storage water tank 22-7 is higher than 50 ℃, the temperature detected by the temperature detector 4-8 is higher than 40 ℃, the flow rate of the material pump 4-6 is increased, the rest control is unchanged, the heat of the rest of the dispersed solar heat collector 22 is indirectly transferred to the material tube shell type heat exchanger 4-2 to heat the material, the heat source 2 is heated, the solar heat source 2 is not operated, and the user completely provides heat by the dispersed solar heat collector 22;
Mode two: distributed solar direct heating mode
In the mode, the dispersed solar heat collector 22 only supplies heat to households, the biogas boiler 2 and the standby heat source 3 do not operate, when the temperature detected by the temperature detector 22-11 of the tail end heat storage water tank 22-7 is between 45 ℃ and 50 ℃, the gate valves 7, 22-1, 22-3, 22-9, 22-10, 22-13 and 22-14 are opened, the circulating pumps 4-6, 22-4, 22-6 and 22-8 are operated, the gate valves 5, 7, 9, 10, 14, 15, 4-5 and 4-4 (opened or closed), the circulating pumps 11, 13, 23-4, 23-5, 24, 25, 27 and 28 are stopped, and the circulating pumps six 8, 12, 22-12, 23-2 and 26 are stopped;
mode three: distributed solar energy and concentrated methane boiler combined heating mode
The mode distributed solar heat collector 22 is only used for heating households, the biogas boiler 2 starts to operate to heat the households, and simultaneously, hot water generated by the biogas boiler is partially shunted to the anaerobic fermentation material shell-and-tube heat exchanger 4-2 to indirectly heat materials, when the temperature of the temperature detector 22-11 of the tail hot water storage tank 22-7 is lower than 45 ℃, the gate valves 4-5, 4-4, 5, 7, 9,10, 22-1, 22-3, 22-13, 22-14, 23-4, 23-5, 27 and 28 are opened, the circulating pumps 4-6, 8, 22-4, 22-6, 22-8 and 23-2 are operated, the gate valves 11, 13, 14, 15, 22-10, 22-9, 24 and 25 are closed, the circulating pumps 12, 22-12, 23-2 and 26 stop operating, the temperature of the temperature detector 4-7 is between 35 ℃ and 40 ℃, and the flow of the material pumps 4-6 is reduced; when the temperature detected by the temperature detector 4-7 is higher than 40 ℃, the flow of the material pump 4-6 is increased, and the rest control is unchanged;
Mode four: distributed solar energy, methane boiler and safe standby heat source combined heating mode
In the mode, the distributed solar heat collector 22 only heats households, the biogas boiler 2 and the standby heat source 3 start to operate to heat the households, heat is distributed to the anaerobic fermentation material shell-and-tube heat exchanger 4-2 to heat materials, gate valves 4-5, 4-4, 5, 7, 9, 10, 11, 13, 22-1, 22-3, 22-13, 22-14, 23-4, 23-5, 27, 28 are opened, circulation pumps 4-6, 8, 12, 22-4, 22-6, 22-8, 23-2 are operated, gate valves 14, 15, 22-10, 22-9, 24, 25 are closed, the circulation pumps 22-12, 23-2, 26 stop operating, a temperature detector 4-7 detects that the temperature is between 35 ℃ and 40 ℃, and the flow rate of the material pumps 4-6 is reduced; when the temperature detected by the temperature detector 4-7 is higher than 40 ℃, the flow of the material pump 4-6 is increased, and the rest control is unchanged;
Mode five: methane boiler and standby heat source combined heating mode
In the mode, the distributed solar heat collector 22 stops working, the biogas boiler 2 and the standby heat source 3 start to operate for heating households, heat is distributed to the anaerobic fermentation material shell-and-tube heat exchanger 4-2 to heat materials, gate valves 4-5, 4-4, 5, 7, 9, 10, 11, 13, 23-4, 23-5, 27 and 28 are opened, circulation pumps 4-6, 8, 12 and 23-2 are operated, gate valves 14, 15, 22-1, 22-3, 22-9, 22-10, 22-13, 22-14, 22-9, 24 and 25 are closed, and the circulation pumps 22-4, 22-6, 22-8, 22-12 and 26 stop operating; the temperature detector 4-7 detects that the temperature is between 35 ℃ and 40 ℃, so that the flow of the material pump 4-6 is reduced; when the temperature detected by the temperature detector 4-7 is higher than 40 ℃, the flow of the material pump 4-6 is increased, and the rest control is unchanged.
The gate valve 4-5 is arranged between the material pump 4-6 and the opening of the anaerobic fermentation material shell-and-tube heat exchanger 4-2c, the gate valve 4-4 is arranged at the discharge opening of the anaerobic fermentation tank 4-1, the gate valve 7 is arranged on the gas pipe 6 between the biogas collection tank 1 and the biogas anaerobic fermentation device 4, the gate valve 14 is arranged on the pipeline of the biogas anaerobic fermentation device 4 connected with the heat supply pipeline water supply pipe 17, the gate valve 15 is arranged on the pipeline of the biogas anaerobic fermentation device 4 and the heat supply pipeline water return pipe 18, the gate valve 22-1 is arranged on the pipeline between the solar heat collector 22-2 and the plate heat exchanger 22-5, the gate valve 22-3 is arranged on the pipeline between the circulating water pump 22-4 and the solar heat collector 22-2, the gate valve 22-9 is arranged on the pipeline between the opening c of the heat storage water tank 22-7 and the plate heat exchanger, the gate valve 22-10 is arranged on a pipeline between the d port of the heat storage water tank 22-7 and the plate heat exchanger, the gate valve 22-13 is arranged on a pipeline between the b port of the heat storage water tank 22-7 and the heat user heating equipment 23, the gate valve 22-14 is arranged on a pipeline between the a port of the heat storage water tank 22-7 and the heat user heating equipment 23, the gate valve 24 is arranged on a pipeline between the plate heat exchanger 21 and the heat supply branch water return pipe 20, the gate valve 25 is arranged on a pipeline between the plate heat exchanger 21 and the heat supply branch water supply pipe 19, the gate valve 5 is arranged on the gas pipe 6 between the biogas collection tank 1 and the biogas boiler 2, the gate valve 9 is arranged on a pipeline of the heat supply pipeline water supply pipe 17, the gate valve 10 is arranged on a pipeline of the heat supply pipeline water return pipe 18, the gate valve 11 is arranged on a pipeline of the standby heat source 3 and the heat supply pipeline water supply pipe 17, the gate valve 13 is arranged on a pipeline between the standby heat source 3 and the heat supply pipeline return pipe 18, the gate valves 23-4 and 23-5 are arranged on a circulation loop between the plate heat exchanger 23-1 and the indoor radiator 23-3, the gate valve 27 is arranged on a pipeline between the plate heat exchanger 23-1 and the heat supply branch water supply pipe 19, and the gate valve 28 is arranged on a pipeline between the plate heat exchanger 23-1 and the heat supply branch return pipe 20.
The circulating pump 4-6 is arranged between the material pretreatment device 4-3 and the opening of the anaerobic fermentation material shell-and-tube heat exchanger 4-2c, the circulating pump 22-4 is arranged between the solar heat collector 22-2 and the plate heat exchanger 22-5, the circulating pump 22-8 is arranged between the opening a of the heat storage water tank 22-7 and the heating equipment of the heat user, the circulating pump 26 is arranged on a pipeline between the plate heat exchanger 21 and the heating branch water supply pipe 19, the circulating pump six 8 is arranged on the heating pipeline water supply pipe 17, the circulating pump 12 is arranged on a pipeline between the standby heat source 3 and the heating pipeline water supply pipe 17, and the circulating pump 23-2 is arranged on a pipeline between the plate heat exchanger 23-1 and the indoor heating radiator 23-3.
The invention has the beneficial effects that:
The distributed solar heat supply system can effectively utilize the surplus heat of the solar heat supply systems of different users in heating seasons, the control valve can be used for controlling the circulating flow direction of water at two sides of the second heat exchanger (anaerobic fermentation material shell-and-tube heat exchanger) to realize the bidirectional heat exchange of the heat supply pipe network and the solar heat supply system, the solar heat supply system can convey the surplus heat to the second heat exchanger through the heat supply pipe network, and the heat supply pipe network can also supplement heat for the solar heat supply system so as to meet the heat demands of users. In non-heating seasons, surplus heat can be transmitted to the second heat exchanger through the heat supply pipe network by controlling the valve and the water pump, and the heat supply, heat storage and heat release of the solar energy systems of all users are mutually coordinated by utilizing the law that all users generate heat and use heat asynchronously and coordinating the heat consumption of all users through the heat supply pipe network, so that the load of a concentrated heat source is reduced, the energy saving purpose is achieved, and the heating stability is improved; meanwhile, the problem that the centralized solar heat supply system cannot be applied due to space limitation in town areas is solved, and popularization and application of the solar heat supply system are greatly promoted.
The winter distributed solar-concentrated biogas coupling heat supply system provided by the invention takes solar heating and biogas boiler heating as main materials and takes standby heat source heating as auxiliary materials, the three materials are combined and mutually complemented, and simultaneously the system forms two biogas material waste heat recovery closed loops under the conditions of sufficient solar heating waste heat and external heat source heating introduction respectively, and fully utilizes solar energy and biogas renewable energy sources on the premise of meeting the heating requirements of heat users, so that the volatility of the solar heating system is reduced, and the system is beneficial to popularization and use in solar resource rich areas in China.
Drawings
FIG. 1 is a diagram of a distributed solar-concentrated biogas coupled heating system of the present invention.
FIG. 2 is a diagram of a system for producing biogas by waste heat recovery according to the invention.
Fig. 3 is a diagram of a distributed solar thermal collection system according to the present invention.
Fig. 4 is a diagram of a thermal user heating system in accordance with the present invention.
Fig. 5 is a control flow chart of the present invention.
Reference numerals
1, A methane collection tank; 2, a methane boiler; 3, standby heat source; 4 biogas anaerobic fermentation equipment; 4-1 anaerobic fermentation tank; 4-2 anaerobic fermentation material shell-and-tube heat exchanger; 4-3 material pretreatment device; gate valves 4-4, 4-5, 7, 9, 10, 11, 13, 14, 15, 22-1, 22-3, 22-9, 22-10, 22-12, 23-4, 23-5, 24, 25, 27, 28; 4-6 material pumps; 4-7 temperature detector; 4-8 temperature detectors; 6, a gas pipe; 8, a heating circulating water pump of the biogas boiler; 12, a standby heat source circulating water pump; a 16 temperature detector; 17 a heat supply pipeline water supply pipe; 18 a return pipe of the heating pipeline; 19 a heating branch water supply pipe; 20a heating branch return pipe; 21 plate heat exchanger; 22 a distributed solar collector; 22-2 solar collectors; 22-4 circulating water pumps; 22-5 plate heat exchanger; 22-6 circulating water pumps; 22-7 heat storage water tanks; 22-8 circulating water pumps; 22-11 temperature detector; 23 heating the user heating equipment; 23-1 plate heat exchanger; 23-2 circulating water pumps; 23-3 indoor heating radiator; 26 a circulating water pump.
Detailed Description
The present invention will be described in further detail with reference to examples.
As shown in fig. 1-5:
a control method of a distributed solar energy-concentrated biogas coupling heat supply system comprises the following steps;
mode one: distributed solar direct heating and solar waste heat heating biogas material mode
When the temperature detected by the temperature detector 22-11 of the tail end heat storage water tank 22-7 is higher than 50 ℃, the temperature detected by the temperature detector 4-8 is between 35 ℃ and 40 ℃, the flow rate of the material pump 4-6 is reduced, the gate valves 4-5, 4-4, 14, 15, 22-1, 22-3, 22-9, 22-10, 22-13, 22-14, 24 and 25 are opened, the gate valves 5, 7, 9, 10, 11, 13, 23-4, 23-5, 27 and 28 are closed, the circulation pumps 4-6, 22-4, 22-6, 22-8 and 26 are operated, the circulation pumps six 8,12 and 23-2 are stopped, when the temperature detected by the temperature detector 22-11 of the tail end heat storage water tank 22-7 is higher than 50 ℃, the temperature detected by the temperature detector 4-8 is higher than 40 ℃, the flow rate of the material pump 4-6 is increased, the rest control is unchanged, the heat of the rest of the dispersed solar heat collector 22 is indirectly transferred to the material tube shell type heat exchanger 4-2 to heat the material, the heat source 2 is heated, the solar heat source 2 is not operated, and the user completely provides heat by the dispersed solar heat collector 22;
Mode two: distributed solar direct heating mode
In the mode, the dispersed solar heat collector 22 only supplies heat to households, the biogas boiler 2 and the standby heat source 3 do not operate, when the temperature detected by the temperature detector 22-11 of the tail end heat storage water tank 22-7 is between 45 ℃ and 50 ℃, the gate valves 7, 22-1, 22-3, 22-9, 22-10, 22-13 and 22-14 are opened, the circulating pumps 4-6, 22-4, 22-6 and 22-8 are operated, the gate valves 5,7, 9, 10, 14, 15, 4-5, 4-4, 11, 13, 23-4, 23-5, 24, 25, 27 and 28 are closed, and the circulating pumps six 8,12, 22-12, 23-2 and 26 are stopped;
mode three: distributed solar energy and concentrated methane boiler combined heating mode
The mode distributed solar heat collector 22 is only used for heating households, the biogas boiler 2 starts to operate to heat the households, and simultaneously, hot water generated by the biogas boiler is partially shunted to the anaerobic fermentation material shell-and-tube heat exchanger 4-2 to indirectly heat materials, when the temperature of the temperature detector 22-11 of the tail hot water storage tank 22-7 is lower than 45 ℃, the gate valves 4-5, 4-4, 5, 7, 9,10, 22-1, 22-3, 22-13, 22-14, 23-4, 23-5, 27 and 28 are opened, the circulating pumps 4-6, 8, 22-4, 22-6, 22-8 and 23-2 are operated, the gate valves 11, 13, 14, 15, 22-10, 22-9, 24 and 25 are closed, the circulating pumps 12, 22-12, 23-2 and 26 stop operating, the temperature of the temperature detector 4-7 is between 35 ℃ and 40 ℃, and the flow of the material pumps 4-6 is reduced; when the temperature detected by the temperature detector 4-7 is higher than 40 ℃, the flow of the material pump 4-6 is increased, and the rest control is unchanged;
Mode four: distributed solar energy, methane boiler and safe standby heat source combined heating mode
In the mode, the distributed solar heat collector 22 only heats households, the biogas boiler 2 and the standby heat source 3 start to operate to heat the households, heat is distributed to the anaerobic fermentation material shell-and-tube heat exchanger 4-2 to heat materials, gate valves 4-5, 4-4, 5, 7, 9, 10, 11, 13, 22-1, 22-3, 22-13, 22-14, 23-4, 23-5, 27, 28 are opened, circulation pumps 4-6, 8, 12, 22-4, 22-6, 22-8, 23-2 are operated, gate valves 14, 15, 22-10, 22-9, 24, 25 are closed, the circulation pumps 22-12, 23-2, 26 stop operating, a temperature detector 4-7 detects that the temperature is between 35 ℃ and 40 ℃, and the flow rate of the material pumps 4-6 is reduced; when the temperature detected by the temperature detector 4-7 is higher than 40 ℃, the flow of the material pump 4-6 is increased, and the rest control is unchanged;
Mode five: methane boiler and standby heat source combined heating mode
In the mode, the distributed solar heat collector 22 stops working, the biogas boiler 2 and the standby heat source 3 start to operate for heating households, heat is distributed to the anaerobic fermentation material shell-and-tube heat exchanger 4-2 to heat materials, gate valves 4-5, 4-4, 5, 7, 9, 10, 11, 13, 23-4, 23-5, 27 and 28 are opened, circulation pumps 4-6, 8, 12 and 23-2 are operated, gate valves 14, 15, 22-1, 22-3, 22-9, 22-10, 22-13, 22-14, 22-9, 24 and 25 are closed, and the circulation pumps 22-4, 22-6, 22-8, 22-12 and 26 stop operating; the temperature detector 4-7 detects that the temperature is between 35 ℃ and 40 ℃, so that the flow of the material pump 4-6 is reduced; when the temperature detected by the temperature detector 4-7 is higher than 40 ℃, the flow of the material pump 4-6 is increased, and the rest control is unchanged.
The gate valve 4-5 is arranged between the material pump 4-6 and the opening of the anaerobic fermentation material shell-and-tube heat exchanger 4-2c, the gate valve 4-4 is arranged at the discharge opening of the anaerobic fermentation tank 4-1, the gate valve 7 is arranged on the gas pipe 6 between the biogas collection tank 1 and the biogas anaerobic fermentation device 4, the gate valve 14 is arranged on the pipeline of the biogas anaerobic fermentation device 4 connected with the heat supply pipeline water supply pipe 17, the gate valve 15 is arranged on the pipeline of the biogas anaerobic fermentation device 4 and the heat supply pipeline water return pipe 18, the gate valve 22-1 is arranged on the pipeline between the solar heat collector 22-2 and the plate heat exchanger 22-5, the gate valve 22-3 is arranged on the pipeline between the circulating water pump 22-4 and the solar heat collector 22-2, the gate valve 22-9 is arranged on the pipeline between the opening c of the heat storage water tank 22-7 and the plate heat exchanger, the gate valve 22-10 is arranged on a pipeline between the d port of the heat storage water tank 22-7 and the plate heat exchanger, the gate valve 22-13 is arranged on a pipeline between the b port of the heat storage water tank 22-7 and the heat user heating equipment 23, the gate valve 22-14 is arranged on a pipeline between the a port of the heat storage water tank 22-7 and the heat user heating equipment 23, the gate valve 24 is arranged on a pipeline between the plate heat exchanger 21 and the heat supply branch water return pipe 20, the gate valve 25 is arranged on a pipeline between the plate heat exchanger 21 and the heat supply branch water supply pipe 19, the gate valve 5 is arranged on the gas pipe 6 between the biogas collection tank 1 and the biogas boiler 2, the gate valve 9 is arranged on a pipeline of the heat supply pipeline water supply pipe 17, the gate valve 10 is arranged on a pipeline of the heat supply pipeline water return pipe 18, the gate valve 11 is arranged on a pipeline of the standby heat source 3 and the heat supply pipeline water supply pipe 17, the gate valve 13 is arranged on a pipeline between the standby heat source 3 and the heat supply pipeline return pipe 18, the gate valves 23-4 and 23-5 are arranged on a circulation loop between the plate heat exchanger 23-1 and the indoor radiator 23-3, the gate valve 27 is arranged on a pipeline between the plate heat exchanger 23-1 and the heat supply branch water supply pipe 19, and the gate valve 28 is arranged on a pipeline between the plate heat exchanger 23-1 and the heat supply branch return pipe 20.
The circulating pump 4-6 is arranged between the material pretreatment device 4-3 and the opening of the anaerobic fermentation material shell-and-tube heat exchanger 4-2c, the circulating pump 22-4 is arranged between the solar heat collector 22-2 and the plate heat exchanger 22-5, the circulating pump 22-8 is arranged between the opening a of the heat storage water tank 22-7 and the heating equipment of the heat user, the circulating pump 26 is arranged on a pipeline between the plate heat exchanger 21 and the heating branch water supply pipe 19, the circulating pump six 8 is arranged on the heating pipeline water supply pipe 17, the circulating pump 12 is arranged on a pipeline between the standby heat source 3 and the heating pipeline water supply pipe 17, and the circulating pump 23-2 is arranged on a pipeline between the plate heat exchanger 23-1 and the indoor heating radiator 23-3.
Claims (3)
1. The operation method of the distributed solar-concentrated biogas coupling heat supply system is characterized by comprising the following steps of;
mode one: distributed solar direct heating and solar waste heat heating biogas material mode
When the temperature detected by a second temperature detector (22-11) of the tail end heat storage water tank (22-7) is higher than 50 ℃, the temperature detected by a first temperature detector (4-8) is between 35 ℃ and 40 ℃, the flow rate of a circulating pump I (4-6) is reduced, a first gate valve (4-5), a second gate valve (4-4), a third gate valve (14), a fourth gate valve (15), a fifth gate valve (22-1), a sixth gate valve (22-3), a seventh gate valve (22-9), an eighth gate valve (22-10), a ninth gate valve (22-13), a tenth gate valve (22-14), an eleventh gate valve (24), a twelfth gate valve (25), a thirteenth gate valve (5), a fourteen gate valve (7), a fifteen gate valve (9), a sixteen gate valve (10), a seventeen (11), an eighteen gate valve (13), a nineteenth gate valve (23-4), a twenty-5), a twenty-one gate valve (27), a twenty-second gate valve (28), a fourth circulating pump (22-6), a third circulating pump (22-6), a fourth circulating pump (22-8), a fifth circulating pump (26), a sixth circulating pump (8), a seventh circulating pump (12) and an eighth circulating pump (23-2), when the temperature detected by a second temperature detector (22-11) of the tail end heat storage water tank (22-7) is higher than 50 ℃, the temperature detected by a first temperature detector (4-8) is higher than 40 ℃, the flow of a first circulating pump (4-6) is increased, the rest control is unchanged, the heat of the surplus part of the distributed solar heat collector (22) is indirectly transferred to an anaerobic fermentation material shell-and-tube heat exchanger (4-2) to heat biogas materials, the biogas boiler (2) does not operate, and a heat source of a heat user is completely provided by the distributed solar heat collector (22);
Mode two: distributed solar direct heating mode
In the mode, the distributed solar heat collector (22) only supplies heat to households, the biogas boiler (2) and the standby heat source (3) do not operate, when the temperature detected by the second temperature detector (22-11) of the tail end hot water storage tank (22-7) is between 45 ℃ and 50 ℃, the second temperature detector (22-11) of the tail end hot water storage tank (22-7) opens a gate valve fourteen (7), a gate valve penta (22-1), a gate valve hexa (22-3), a gate valve hepta (22-9), a gate valve octa (22-10), a gate valve nona (22-13) and a gate valve deca (22-14), operates a circulating pump one (4-6), a circulating pump two (22-4), a circulating pump three (22-6), a circulating pump four (22-8), closes a gate valve one (4-5), a gate valve two (4-4), a gate valve thirteen (5), a gate valve fourteen (7), a gate valve fifteen (9), sixteen (10), three (14), a gate valve four (15), a gate valve seventeen (11), a gate valve eighteen (13), a gate valve hexa (23-4), twenty (23-5), eleven (24), a gate valve twelve (25), a gate valve twenty-eleven (27), a gate valve twenty-six (28), a circulating pump (12) and a circulating pump 12 The circulating pump eight (23-2) and the circulating pump five (26) stop running;
mode three: distributed solar energy and concentrated methane boiler combined heating mode
The distributed solar heat collector (22) is only used for heating households, a biogas boiler (2) starts to operate to heat the households, hot water generated by the biogas boiler is partially split into an anaerobic fermentation material shell type heat exchanger (4-2) to indirectly heat materials, when the temperature detected by a second temperature detector (22-11) of a tail hot water storage tank (22-7) is lower than 45 ℃, a first circulating pump (4-5), a second circulating pump (4-4), a thirteenth (5) gate valve, a fourteen (7) gate valve, a fifteen (9) gate valve, a sixteen (10) gate valve, a fifth (22-1) gate valve, a sixth (22-3) gate valve, a ninth (22-13) gate valve, a tenth (22-14) gate valve, a ninety (23-4) gate valve, a twenty-5) gate valve, a twenty-one (27) gate valve, a twenty-second (28) gate valve, a first circulating pump (4-6), a sixth (8) circulating pump, a third circulating pump (22-6), a fourth circulating pump (22-8), a eighth (23-2) circulating pump, a seventeen (11), a closing gate valve (13), a eighteen (14), a fourth gate valve, a seventy (15), a seventh (22-9) gate valve, a seventy (22-9) and an eighth (24-9) gate valve A gate valve twelve (25), a circulating pump seven (12), a circulating pump 22-12, a circulating pump eight (23-2) and a circulating pump five (26) stop running, and a temperature detector 4-7 detects that the temperature is between 35 ℃ and 40 ℃ so as to reduce the flow of the circulating pump one (4-6); when the temperature detected by the temperature detector (4-7) is higher than 40 ℃, the flow of the first circulating pump (4-6) is increased, and the rest control is unchanged;
Mode four: distributed solar energy, methane boiler and safe standby heat source combined heating mode
In the mode, the distributed solar heat collector (22) only heats households, the biogas boiler (2) and the standby heat source (3) start to operate to heat the households, heat is distributed to the anaerobic fermentation material shell type heat exchanger (4-2) to heat materials, the first gate valve (4-5), the second gate valve (4-4), the thirteenth gate valve (5), the fourteen gate valve (7), the fifteen gate valve (9), the sixteen gate valve (10), the seventeen gate valves (11), the eighteen gate valves (13), the fifth gate valve (22-1), the sixth gate valve (22-3), the ninth gate valve (22-13), the tenth gate valve (22-14), the nineteen gate valves (23-4), the twenty-5), the twenty-one gate valve (27) and the twenty-two gate valves (28) are started, the first circulating pump (4-6), the sixth circulating pump (8), the seventh circulating pump (12), the second circulating pump (22-4), the third circulating pump (22-6), the fourth circulating pump (22-8), the eighth circulating pump (23-2), the third gate valve (14), the fourth gate valve (15), the eighth gate valve (22-10), the seventh gate valve (22-9), the eleventh (24), the eleventh (22-25) and the twenty-second circulating pump are started The circulating pump eight (23-2) and the circulating pump five (26) stop running, the temperature detector (4-7) detects that the temperature is between 35 ℃ and 40 ℃, and the flow of the circulating pump one (4-6) is reduced; when the temperature detected by the temperature detector (4-7) is higher than 40 ℃, the flow of the first circulating pump (4-6) is increased, and the rest control is unchanged;
Mode five: methane boiler and standby heat source combined heating mode
In the mode, the distributed solar heat collector (22) stops working, the biogas boiler (2) and the standby heat source (3) start to operate to heat households, heat is distributed to heat materials of the anaerobic fermentation material shell type heat exchanger (4-2), the first (4-5) gate valve, the second (4-4) gate valve, the thirteenth (5) gate valve, the fourteen (7) gate valve, the fifteen (9) gate valve, the sixteen (10) gate valve, the seventeen (11) gate valve, the eighteen (13) gate valve, the nineteenth (23-4) gate valve, the twenty (23-5) gate valve, the twenty (27) gate valve, the twenty (28) gate valve, the first (4-6) circulating pump, the sixth (8) circulating pump, the seventh (12) circulating pump, the eighth (23-2) gate valve, the third (14) gate valve, the fourth (15) gate valve, the fifth (22-1) gate valve, the sixth (22-3) gate valve, the seventh (22-9) gate valve, the eighth (22-10), the nineteenth (22-13) gate valve, the tenth (22-14) gate valve, the seventeen (22-9), the eleven (24) gate valve, the twelve (25) gate valve, the second (22-4), the third (22-6) circulating pump, the fourth (8) circulating pump and the fourth (8) The circulating pump (22-12) and the circulating pump five (26) stop running; the temperature detector (4-7) detects that the temperature is between 35 ℃ and 40 ℃ and reduces the flow of the circulating pump I (4-6); when the temperature detected by the temperature detector (4-7) is higher than 40 ℃, the flow of the first circulating pump (4-6) is increased, and the rest control is unchanged;
the method is realized by a system which comprises biogas anaerobic fermentation equipment (4), a waste heat recovery system, a distributed solar heat collector (22) and a standby heat source (3);
the biogas anaerobic fermentation equipment (4) is used for producing biogas by anaerobic fermentation;
The waste heat recovery system is used for recovering waste heat of the distributed solar heat collector (22) and waste heat of the centralized heat source;
The distributed solar collector (22) is used for providing hot water for a heating user heating device (23);
the standby heat source (3) is used for stabilizing the water supply temperature and guaranteeing the heat demand of households;
the biogas anaerobic fermentation equipment (4) is connected with the biogas collection tank (1) through a gas transmission pipeline (6), the biogas collection tank (1) is used for conveying biogas to the biogas boiler (2) through the gas transmission pipeline (6), a water supply pipeline branch of the biogas boiler (2) is connected with an anaerobic fermentation material shell-and-tube heat exchanger (4-2) in the biogas anaerobic fermentation equipment (4) so as to realize waste heat recovery and preheating of anaerobic fermentation materials, a long-distance conveying heat supply pipeline water supply pipe (17) and a heat supply pipeline water return pipe (18) are respectively connected with the user heating equipment (23) and the plate heat exchanger I (21), and the distributed solar heat collector (22) is respectively connected with the user heating equipment (23) and the plate heat exchanger I (21);
The waste heat recovery system comprises a heat storage water tank (22-7) at a household end, when the waste heat at the household end is recovered, hot water flows from the heat storage water tank (22-7) at the household end to a plate heat exchanger I (21) for heat exchange, hot water is converged to a water supply and return main pipe through a circulating pump V (26) at each household end, and finally flows into a port b from a port d of the anaerobic fermentation material tube shell-and-tube heat exchanger (4-2) to heat materials;
When the waste heat of the solar heat collector at the heat user side is insufficient or insufficient to meet the heat demand, the heating hot water of the biogas boiler (2) is shunted to the anaerobic fermentation material shell-and-tube heat exchanger (4-2) to heat anaerobic fermentation materials through the heating circulating pump (8) of the biogas boiler;
A temperature detector (4-7) is arranged on a b-port line of the anaerobic fermentation material shell-and-tube heat exchanger (4-2), and a first temperature detector (4-8) is arranged on a d-port line of the anaerobic fermentation material shell-and-tube heat exchanger (4-2);
The distributed solar heat collector (22) comprises a solar heat collector (22-2), a plate heat exchanger II (22-5), a heat storage water tank (22-7) and a circulating pump II (22-4), wherein a water outlet of the circulating pump II (22-4) is connected with a water inlet of the solar heat collector (22-2), a water inlet of a circulating pump III (22-6) is connected with a water outlet of the plate heat exchanger II (22-5), a water outlet of the solar heat collector (22-2) is connected with a water inlet of the plate heat exchanger II (22-5) to form a solar heat collection closed loop, water in the heat storage water tank (22-7) flows through the plate heat exchanger I (21) through the circulating pump (22-12) to form a tail end waste heat recovery closed loop, and hot water in the heat storage water tank (22-7) flows into an indoor radiator (23-3) for heating through a circulating pump IV (22-8);
Hot water prepared by the standby heat source (3) flows into a heat supply pipeline water supply pipe (17) and a heat supply pipeline water return pipe (18) to supplement heat through a standby heat source circulating pump seven (12), and the standby heat source circulating pump seven (12) is arranged on the heat supply water return pipe;
A second temperature detector (22-11) is arranged on the heat storage water tank (22-7);
The first gate valve (4-5) is arranged between the first circulating pump (4-6) and the c port of the shell-and-tube heat exchanger (4-2) for anaerobic fermentation materials, the second gate valve (4-4) is arranged at the discharge port of the anaerobic fermentation tank (4-1), the fourteen gate valve (7) is arranged on the gas transmission pipeline (6) between the biogas collection tank (1) and the biogas anaerobic fermentation equipment (4), the third gate valve (14) is arranged on the pipeline connected with the biogas anaerobic fermentation equipment (4) and the water supply pipe (17) of the heat supply pipeline, the fourth gate valve (15) is arranged on the pipeline connected with the water supply pipe (17) of the biogas anaerobic fermentation equipment (4) and the heat supply pipeline, the fifth gate valve (22-1) is arranged on the pipeline between the solar heat collector (22-2) and the second plate heat exchanger (22-5), the sixth gate valve (22-3) is arranged on the pipeline between the second circulating pump (22-4) and the solar heat collector (22-2), the seventh gate valve (22-9) is arranged on the c port of the water tank (22-7) and the pipeline connected with the heat supply pipe (17), the fifth gate valve (22-1) is arranged on the pipeline (22-7) and the heat collector (13) is arranged on the water tank (13), a gate valve ten (22-14) is arranged on a pipeline between an a port of a heat storage water tank (22-7) and a heat user heating device (23), a gate valve eleven (24) is arranged on a pipeline between a plate heat exchanger I (21) and a heating branch water return pipe (20), a gate valve twelve (25) is arranged on a pipeline between the plate heat exchanger I (21) and the heating branch water supply pipe (19), a gate valve thirteen (5) is arranged on a gas transmission pipeline (6) between a methane collecting tank (1) and a methane boiler (2), a gate valve fifteen (9) is arranged on a pipeline of a heating pipeline water supply pipe (17), a gate valve sixteen (10) is arranged on a pipeline of a heating pipeline water return pipe (18), a gate valve seventeen (11) is arranged on a pipeline between a standby heat source (3) and the heating pipeline water return pipe (17), a gate valve nineteen (23-4) and a gate valve twenty-5) are arranged on a plate heat exchanger III (23-1) and a circulating pipeline (23) between an indoor radiator (23-3) and a heating branch water supply pipe (27) on the gate valve III-27, the gate valve twenty-two (28) is arranged on a pipeline between the plate heat exchanger III (23-1) and the heating branch return pipe (20);
The circulating pump I (4-6) is arranged between the material pretreatment device (4-3) and the c port of the anaerobic fermentation material shell-and-tube heat exchanger (4-2), the circulating pump II (22-4) is arranged between the solar heat collector (22-2) and the plate heat exchanger II (22-5), the circulating pump IV (22-8) is arranged between the a port of the heat storage water tank (22-7) and the heating equipment of the heat user, the circulating pump V (26) is arranged on a pipeline between the plate heat exchanger I (21) and the heating branch water supply pipe (19), the circulating pump VI (8) is arranged on the heating pipeline water supply pipe (17), the circulating pump V (12) is arranged on a pipeline between the standby heat source (3) and the heating pipeline water supply pipe (17), and the circulating pump V (23-2) is arranged on a pipeline between the plate heat exchanger III (23-1) and the indoor radiator (23-3).
2. A method of operating a distributed solar-concentrated biogas coupled heating system according to claim 1, characterized in that the water supply and return lines of the biogas boiler (2) and the water supply and return lines of the backup heat source (3) are arranged in parallel when the heat demand of the heat consumer cannot be met.
3. The operation method of the distributed solar-concentrated biogas coupling heat supply system according to claim 1, wherein the biogas anaerobic fermentation equipment (4) comprises a material pretreatment device (4-3), the output end of the material pretreatment device (4-3) is connected with the c port of the anaerobic fermentation material shell-and-tube heat exchanger (4-2) through a circulating pump I (4-6), the a port output end of the anaerobic fermentation material shell-and-tube heat exchanger (4-2) is connected with the anaerobic fermentation tank (4-1), and biogas generated by the anaerobic fermentation tank (4-1) is communicated with the biogas collection tank (1) through a gas transmission pipeline (6).
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN204630092U (en) * | 2015-04-21 | 2015-09-09 | 农业部南京农业机械化研究所 | A kind of energy-conservation anaerobic reaction device |
| CN110986137A (en) * | 2019-12-24 | 2020-04-10 | 西安建筑科技大学 | Distributed solar heating system and method |
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| CN201212713Y (en) * | 2008-06-05 | 2009-03-25 | 郑建秋 | Integrated utilizing system for solar energy and marsh gas |
| US20100031953A1 (en) * | 2008-08-07 | 2010-02-11 | Krassimire Mihaylov Penev | Hybrid Water Heating System |
| RU105620U1 (en) * | 2010-10-13 | 2011-06-20 | Государственное образовательное учреждение высшего профессионального образования "Пензенская государственная технологическая академия" | BIOGAS COMPLEX |
| CN103233785B (en) * | 2013-04-02 | 2015-06-24 | 山东科技大学 | Combined double-energy-source power generation system utilizing solar power and methane |
| KR20170117663A (en) * | 2016-04-14 | 2017-10-24 | 주식회사 엔박 | the hot water generater using the recovery heat of both compressed air and cooling oil of screw typed air compressor |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN204630092U (en) * | 2015-04-21 | 2015-09-09 | 农业部南京农业机械化研究所 | A kind of energy-conservation anaerobic reaction device |
| CN110986137A (en) * | 2019-12-24 | 2020-04-10 | 西安建筑科技大学 | Distributed solar heating system and method |
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