Anaerobic fermentation equipment heating system based on biogas power generation waste heat

Abstract

The utility model relates to an anaerobic fermentation equipment heating system based on biogas power generation waste heat, which belongs to the technical field of heating systems and comprises a biogas combustion power generation system, a power equipment system, a flue gas waste heat utilization system and anaerobic fermentation equipment. The power equipment system is connected with the biogas combustion power generation system through a cable; the flue gas waste heat utilization system is used for recycling flue gas of the biogas combustion power generation system; the anaerobic fermentation equipment is used for storing and fermenting biomass raw materials, and a heating part of the anaerobic fermentation equipment is communicated with the flue gas waste heat utilization system. The system has the power generation function, heat energy in smoke can be fully utilized, the energy utilization efficiency is improved, and energy waste is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of heating systems, in particular to a heating system for anaerobic fermentation equipment based on waste heat from biogas power generation. Background Art

[0002] Biogas fermentation is an important way to utilize biomass energy. Through the anaerobic metabolism of microorganisms, organic matter is converted into biogas, the main component of which is methane. Biogas is not only a clean and renewable energy source, but can also be used as a feedstock for hydrogen production.

[0003] To ensure the efficient fermentation of biogas, the temperature of the anaerobic fermentation tank needs to be maintained between 35-40°C. Traditional biogas fermentation processes typically use two heating methods to heat the anaerobic fermentation tank: electric heating and steam heating. Directly heating the biomass feedstock in the anaerobic fermentation tank through electric heating has the problem of high energy consumption and is greatly affected by the power grid. The method of generating high-temperature steam through a steam boiler and then introducing the steam into the anaerobic fermentation tank for heating requires additional fuel and has high equipment investment costs. In addition, the biogas hydrogen production process also requires additional fuel for power generation.

[0004] In view of the above technical phenomena, a new type of anaerobic fermentation tank heating system is urgently needed to stabilize the heating process of the system and reduce the operating cost of the system. Summary of the Invention

[0005] The purpose of this utility model is to provide an anaerobic fermentation equipment heating system based on the waste heat of biogas power generation, which utilizes the electricity generated in the biogas power generation process and the heat of the flue gas, improves energy utilization efficiency, reduces energy waste, and reduces the cost of system operation.

[0006] The utility model provides a heating system for anaerobic fermentation equipment based on waste heat from biogas power generation, which adopts the following technical solutions:

[0007] A heating system for anaerobic fermentation equipment based on waste heat from biogas power generation, comprising:

[0008] Biogas combustion power generation system;

[0009] A power equipment system connected to the biogas combustion power generation system via a cable;

[0010] A flue gas waste heat utilization system for recovering flue gas from the biogas combustion power generation system;

[0011] The anaerobic fermentation equipment is used for storing biomass raw materials and performing fermentation. The heating part of the anaerobic fermentation equipment is connected to the flue gas waste heat utilization system.

[0012] Preferably, the biogas combustion power generation system includes a gas steam boiler, a steam turbine and a generator;

[0013] The hot steam released by the gas steam boiler is used to operate the steam turbine;

[0014] The steam turbine is used to convert the thermal energy in the hot steam into electrical energy;

[0015] The generator is used to convert electrical energy into electrical output;

[0016] The cables are commonly connected to the generator and the moving equipment system.

[0017] Preferably, the flue gas waste heat utilization system includes a circulation pump, a heat exchanger and a smoke exhaust pipe;

[0018] The circulating pump is used to transport the medium into the heat exchanger;

[0019] The heat exchanger is used to receive flue gas from a biogas combustion power generation system;

[0020] The smoke exhaust pipe is used to receive the smoke exhausted by the heat exchanger.

[0021] Preferably, the anaerobic fermentation tank is a coil-type anaerobic fermentation tank, and the input end of the coil portion of the anaerobic fermentation tank is connected to the medium output end of the heat exchanger.

[0022] Preferably, the output end of the coil portion of the anaerobic fermentation tank is connected to the input end of the circulation pump.

[0023] Preferably, the gas steam boiler and the steam turbine are connected to each other via a control valve and a mass flow meter.

[0024] Preferably, the input end of the biogas combustion power generation system is connected to a biogas desulfurization device.

[0025] In summary, the present invention has the following beneficial technical effects:

[0026] 1. The biogas combustion power generation system in the present invention uses part of the energy generated by burning biogas for power generation and the other part for heating the anaerobic fermentation tank. The electricity is transmitted to the dynamic equipment system to meet the normal production operation of the dynamic equipment. The flue gas generated by the biogas combustion power generation system is recovered by the flue gas waste heat utilization system and acts on the anaerobic fermentation equipment to meet the normal working temperature of the anaerobic fermentation equipment. The system not only has the power generation function, but also can make full use of the heat energy in the flue gas, improve energy utilization efficiency, and reduce energy waste.

[0027] 2. The flue gas waste heat utilization system in the present invention includes a circulation pump, a heat exchanger and a smoke exhaust pipe. Usually, the circulation pump transports the medium into the heat exchanger, and the flue gas from the biogas combustion power generation system is transported into the heat exchanger to heat the medium in the heat exchanger. The medium in the heat exchanger is transported to the coil part of the anaerobic fermentation equipment, so that the anaerobic fermentation equipment is heated to the operating temperature, ensuring the normal fermentation of the anaerobic fermentation equipment.

[0028] 3. The output end of the coil portion of the anaerobic fermentation equipment in the present invention is connected to the input end of the circulation pump to achieve the recycling of the medium. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a structural schematic diagram of a heating system for anaerobic fermentation equipment based on waste heat from biogas power generation provided by an embodiment of the utility model.

[0030] Explanation of the accompanying symbols: 1. Biogas combustion power generation system; 11. Gas steam boiler; 111. Control valve; 112. Mass flow meter; 12. Steam turbine; 13. Generator; 14. Cable; 2. Dynamic equipment system; 3. Flue gas waste heat utilization system; 31. Circulation pump; 32. Heat exchanger; 33. Chimney; 4. Anaerobic fermentation equipment; 5. Biogas desulfurization device. DETAILED DESCRIPTION

[0031] The following is combined with Figure 1 The utility model is described in further detail.

[0032] The utility model provides a heating system for anaerobic fermentation equipment based on waste heat from biogas power generation. Figure 1 , including a biogas combustion power generation system 1, a dynamic equipment system 2, a flue gas waste heat utilization system 3 and an anaerobic fermentation equipment 4; the biogas combustion power generation system 1 burns biogas to generate heat, part of which is transmitted to the dynamic equipment system 2, and the other part is transmitted to the flue gas waste heat utilization system 3. The flue gas waste heat utilization system 3 recovers the flue gas of the biogas power generation system and applies the flue gas heat to the heating part of the anaerobic fermentation equipment 4 to meet the normal fermentation temperature of the anaerobic fermentation equipment 4.

[0033] Reference Figure 1The biogas combustion power generation system 1 includes a gas steam boiler 11, a steam turbine 12, and a generator 13; the hot steam released by the gas steam boiler 11 is used to operate the steam turbine 12. The gas steam boiler 11 and the steam turbine 12 are connected to a control valve 111 and a mass flow meter 112. The control valve 111 and the mass flow meter 112 are adjusted to preset parameters. The steam turbine 12 is used to convert the thermal energy in the hot steam into electrical energy. The generator 13 is used to convert the electrical energy into electrical output. The generator 13 is connected to the dynamic equipment system 2 by a cable 14 to transmit electrical energy to the dynamic equipment system 2. The dynamic equipment system 2 generally refers to a rotating device driven by a driving machine. The dynamic equipment system 2 in this embodiment can preferably be a biogas hydrogen production system, so that the biogas combustion power generation system 1 can meet the normal operation of the biogas hydrogen production system. The input end of the biogas combustion power generation system 1 is connected to the biogas desulfurization device 5, that is, the biogas treated by the biogas desulfurization device 5 is transmitted to the gas steam boiler 11.

[0034] Reference Figure 1 The flue gas waste heat utilization system 3 includes a circulation pump 31, a heat exchanger 32, and a smoke exhaust chimney 33. The circulation pump 31 is used to transport a medium, preferably water in this embodiment, into the heat exchanger 32. The heat exchanger 32 is used to receive flue gas from the biogas combustion power generation system 1, and the smoke exhaust chimney 33 is used to receive the flue gas discharged from the heat exchanger 32. The flue gas after combustion in the biogas combustion power generation system 1 in this embodiment has a temperature greater than 900°C. The flue gas enters the heat exchanger 32 and heats the water in the heat exchanger 32 to a temperature of 50-80°C. The water in the heat exchanger 32 is then transported to the anaerobic fermentation equipment 4 via the circulation pump 31 to heat the anaerobic fermentation equipment 4.

[0035] Reference Figure 1 The anaerobic fermentation equipment 4 in this embodiment is preferably a coil-type anaerobic fermentation tank. The input end of the coil portion of the anaerobic fermentation equipment 4 is connected to the medium output end of the heat exchanger 32, that is, the water heated by the heat exchanger 32 enters the coil portion of the anaerobic fermentation equipment 4 to heat the anaerobic fermentation equipment 4; the output end of the coil portion of the anaerobic fermentation equipment 4 is connected to the input end of the circulation pump 31, that is, the water in the coil portion of the anaerobic fermentation equipment 4 re-enters the heat exchanger 32 under the action of the circulation pump 31, and the water is reheated, thereby meeting the recycling of water.

[0036] The implementation principle of the heating system of anaerobic fermentation equipment based on waste heat from biogas power generation in this utility model is as follows:

[0037] The biogas combustion power generation system 1 of the present invention uses part of the energy generated by burning biogas for power generation and the remaining part for heating the anaerobic fermentation tank. The electricity can be transmitted to the power plant system 2 to meet the normal production operation of the power plant. The flue gas generated by the biogas combustion power generation system 1 is recovered by the heat exchanger 32 in the flue gas waste heat utilization system 3 to heat the medium in the heat exchanger 32. The heated medium is then transmitted to the anaerobic fermentation equipment 4 to meet the normal operating temperature of the anaerobic fermentation equipment 4. This system not only has the function of generating electricity, but also can fully utilize the heat energy in the flue gas, improve energy utilization efficiency, and reduce energy waste.

[0038] The above are all preferred embodiments of the present invention, and are not intended to limit the scope of protection of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. A heating system for anaerobic fermentation equipment based on waste heat from biogas power generation, characterized in that: include: Biogas combustion power generation system (1); A power plant system (2) connected to the biogas combustion power generation system (1) via a cable (14); A flue gas waste heat utilization system (3) for recovering flue gas from the biogas combustion power generation system (1); The anaerobic fermentation equipment (4) is used for storing biomass raw materials and performing fermentation. The heating part of the anaerobic fermentation equipment (4) is connected to the flue gas waste heat utilization system (3).

2. The heating system for anaerobic fermentation equipment based on waste heat from biogas power generation according to claim 1, characterized in that: The biogas combustion power generation system (1) comprises a gas steam boiler (11), a steam turbine (12) and a generator (13); The hot steam released by the gas steam boiler (11) is used to operate the steam turbine (12); The steam turbine (12) is used to convert the thermal energy in the hot steam into electrical energy; The generator (13) is used to convert electrical energy into electrical output; The cable (14) is commonly connected to the generator (13) and the moving equipment system (2).

3. The heating system for anaerobic fermentation equipment based on waste heat from biogas power generation according to claim 1, characterized in that: The flue gas waste heat utilization system (3) includes a circulation pump (31), a heat exchanger (32) and a smoke exhaust pipe (33); The circulating pump (31) is used to transport the medium into the heat exchanger (32); The heat exchanger (32) is used to receive flue gas from the biogas combustion power generation system (1); The smoke exhaust pipe (33) is used to receive smoke exhausted from the heat exchanger (32).

4. The heating system for anaerobic fermentation equipment based on waste heat from biogas power generation according to claim 3, characterized in that: The anaerobic fermentation equipment (4) is a coil-type anaerobic fermentation tank, and the input end of the coil portion of the anaerobic fermentation equipment (4) is connected to the medium output end of the heat exchanger (32).

5. The heating system for anaerobic fermentation equipment based on waste heat from biogas power generation according to claim 4, characterized in that: The output end of the coil portion of the anaerobic fermentation equipment (4) is connected to the input end of the circulation pump (31).

6. The heating system for anaerobic fermentation equipment based on waste heat from biogas power generation according to claim 2, characterized in that: The gas steam boiler (11) and the steam turbine (12) are connected together via a control valve (111) and a mass flow meter (112).

7. The heating system for anaerobic fermentation equipment based on waste heat from biogas power generation according to claim 1, characterized in that: The input end of the biogas combustion power generation system (1) is connected to a biogas desulfurization device (5).

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