Multi-energy complementary resource utilization system for agricultural rural organic wastes

Abstract

The utility model provides a multi-energy complementary resource utilization system for agricultural rural organic wastes, and relates to the technical field of resource utilization of organic wastes. The system comprises a pretreatment unit, an anaerobic fermentation unit, a high-temperature aerobic composting fermentation unit, a biogas slurry clarification treatment unit, a biogas purification and storage unit, a hot air drying unit, a power generation unit, a temperature increasing unit, a living gas supply unit and an emergency torch. The system efficiently degrades and converts organic wastes into resources such as biogas, organic fertilizers and the like through cooperative treatment of high-concentration anaerobic fermentation and high-temperature aerobic composting, performs power generation, boiler warming and hot air drying by utilizing the biogas, and adopts an advantage complementary mode in cooperation with solar power generation, solar hot water and solar hot air drying technologies. Effective complementation of light-electricity-gas-heat-fertilizer multi-energy resources can be achieved, the operation efficiency and the treatment effect of organic waste treatment are improved, dependence on external energy can be reduced, the energy cost is reduced, and zero operation cost or even negative operation cost is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of resource utilization of organic waste, in particular to a multi-energy complementary resource utilization system for agricultural and rural organic waste. Background Art

[0002] my country is a big agricultural country. The annual output of agricultural and rural organic waste such as agricultural straw, domestic garbage, and livestock and poultry manure exceeds 4 billion tons. The waste is rich in organic matter, nitrogen, phosphorus, potassium nutrients and trace elements. If it is effectively processed and utilized as a resource, it will not only help reduce its pollution to the environment, but also "turn waste into treasure" and promote the ecological organic cycle and sustainable development of agriculture and rural areas.

[0003] The resource utilization of organic waste mainly includes four directions: fertilizer, feed, energy, and substrate. Anaerobic fermentation and aerobic composting technology are important technical means for the disposal of organic waste. Anaerobic fermentation technology has the advantages of low operating costs and recyclable clean energy, but in actual engineering applications, it still has defects such as large footprint, long processing time, and unstable operation in winter; the aerobic composting process can kill pathogens in organic waste and make it harmless, but aerobic composting of organic waste has defects such as high energy consumption, high deodorization cost, and large nitrogen loss. In the current context of rural ecological revitalization and comprehensive improvement of human settlement environment, in view of the defects of single aerobic composting and anaerobic fermentation technology, combined with the characteristics of organic waste such as many types, large differences in moisture content, large limitations of single treatment and high cost, high-concentration anaerobic fermentation of organic waste and high-temperature aerobic composting are used for coordinated treatment, anaerobic production of biogas, biogas power generation, boiler heating, biogas drying and coordinated solar energy utilization. The complementary advantages of the model develops a multi-energy complementary resource utilization system for organic waste to solve the problems of reduction, harmlessness and low resource utilization rate of agricultural and rural organic waste, system instability and high system energy consumption, which is of great significance to the realization of green and sustainable energy development. Utility Model Content

[0004] The purpose of the utility model is to address the deficiencies in the prior art and provide a multi-energy complementary resource utilization system for agricultural and rural organic waste.

[0005] The utility model is realized by the following technical solutions:

[0006] A multi-energy complementary resource utilization system for agricultural and rural organic waste, which includes a pretreatment unit, an anaerobic fermentation unit, a high-temperature aerobic composting fermentation unit, a biogas clarification treatment unit, a biogas purification and storage unit, a hot air drying unit, a power generation unit, a warming unit, a domestic gas supply unit and an emergency torch.

[0007] The pretreatment unit includes a pretreatment tank, in which a pretreatment tank outlet, a submersible mixer and a pretreatment heating coil are arranged, and the pretreatment heating coil is provided with a heating coil water outlet and a heating coil water inlet. Straw, domestic garbage, livestock and poultry manure and other raw organic wastes are synergistically treated in the pretreatment tank to obtain a high-concentration organic mixture.

[0008] The anaerobic fermentation unit comprises a primary high-concentration anaerobic fermentation device and a secondary high-concentration anaerobic fermentation device. The primary high-concentration anaerobic fermentation device is provided with a feed inlet 1, a feed outlet 1, a heating coil 1 and a stirring motor 1, and the heating coil 1 is provided with a water inlet 1 and a water outlet 1; the secondary high-concentration anaerobic fermentation device is provided with a feed inlet 2, a heating coil 2 and a stirring motor 2, and the heating coil 2 is provided with a water inlet 2 and a water outlet 2; a solid-liquid separator is arranged at the rear of the secondary high-concentration anaerobic fermentation device.

[0009] After anaerobic fermentation of the organic mixture, the solid-liquid separator separates the residue and the biogas liquid into the biogas residue, which is transported to the aerobic fermentation device and the biogas liquid enters the intermediate water tank.

[0010] The high temperature aerobic composting fermentation unit comprises an aerobic fermentation device and an aeration fan.

[0011] The biogas slurry clarification treatment unit comprises an air floatation machine and a biogas slurry concentration device. The front of the air floatation machine is connected to the intermediate water pool, and the rear of the air floatation machine is connected to the biogas slurry concentration device. The biogas slurry is treated by the biogas slurry concentration device to produce concentrated biogas slurry fertilizer.

[0012] The biogas purification and storage unit comprises a desulfurization device, a gas-water separator and a gas storage cabinet, and the gas storage cabinet is provided with a film blowing fan.

[0013] The hot air drying unit comprises a biogas hot air furnace, a solar air collector, a hot air blower and an organic fertilizer particle drying device.

[0014] The power generation unit comprises a biogas generator set and a solar power generation device.

[0015] The temperature increasing unit comprises a biogas boiler, a first hot water circulation pump, a solar water heater, a second hot water circulation pump, a water distributor and a water collector.

[0016] The domestic gas supply unit can be used for household cooking, heating, hot water, biogas lamps, vegetable greenhouse insulation, etc.

[0017] Preferably, the discharge port of the pretreatment tank is connected to the main feed pipe, the main feed pipe is connected to feed port 1, and the discharge port 1 is connected to feed port 2 to form a feed pipeline system.

[0018] Preferably, the first-level high-concentration anaerobic fermentation device and the second-level high-concentration anaerobic fermentation device are both connected to the first main air pipe, the first main air pipe is connected to the desulfurization device, the desulfurization device is connected to the gas-water separator through the second main air pipe, the gas-water separator is connected to the gas storage cabinet through the third main air pipe, and the gas storage cabinet is respectively connected to the biogas hot air furnace, the biogas generator set, the biogas boiler, the domestic gas supply unit and the emergency torch through a multi-way valve to form a biogas pipeline system.

[0019] Preferably, the biogas hot air furnace and the solar air collector are connected in parallel and communicated with a hot air blower, and the hot air blower is connected with an organic fertilizer particle drying device.

[0020] Preferably, the biogas generator set is connected to the main cable through power output module 1, the solar power generation equipment is connected to the main cable through power output module 2, and the main cable is connected to the organic fertilizer particle drying device, the aeration fan, the film blowing fan, the hot air blower, the biogas slurry concentration device, the stirring motor 1, the stirring motor 2 and the submersible mixer through each branch cable to form an internal power network.

[0021] Preferably, the biogas boiler is provided with a boiler water return port and a boiler water outlet, and the solar water heater is provided with a solar water return port and a solar water outlet. The boiler water return port and the solar water return port are connected in parallel and are connected to a water distributor, the water distributor is connected to a hot water circulation pump 1, the hot water circulation pump 1 is connected to a cold water main pipeline, a plurality of cold water branch pipes are provided on the cold water main pipeline, and the cold water branch pipes are respectively connected to the heating coil water outlet, water outlet 1, and water outlet 2 to form a cold water circulation pipeline; the boiler water outlet and the solar water outlet are connected in parallel and are connected to a water collector, the water collector is connected to a hot water circulation pump 2, the hot water circulation pump 2 is connected to the hot water main pipeline, a plurality of hot water branch pipes are provided on the hot water main pipeline, and the hot water branch pipes are respectively connected to the heating coil water inlet, water inlet 1, and water inlet 2 to form a hot water circulation pipeline; a warming circulation system is formed by the cold water circulation pipeline and the hot water circulation pipeline.

[0022] Preferably, the gas storage tank is a double-membrane flexible gas storage tank, the inner and outer membrane materials of which have high strength, high toughness and corrosion resistance, and can effectively isolate the biogas from the outside to ensure the stability and safety of gas storage.

[0023] Preferably, a multi-energy complementary resource utilization system for agricultural and rural organic waste includes the emergency torch, so as to be used for emergency combustion of biogas in case of emergency or equipment maintenance.

[0024] Compared with the prior art, the beneficial effects of the utility model are:

[0025] Through the coordinated treatment technology of high-concentration anaerobic fermentation and high-temperature aerobic composting, organic mixed materials can efficiently degrade organic waste into high-value resources such as biogas and organic fertilizer. Biogas is used for power generation, boiler heating, and hot air drying of organic fertilizer particles. Combined with solar power generation, solar water heating, and solar hot air drying technology, the complementary advantages model can be adopted to achieve effective complementarity of multi-energy resources such as "light-electricity-gas-heat-fertilizer", improve the operating efficiency and treatment effect of organic waste treatment, improve the utilization rate of clean energy, reduce dependence on external energy, and reduce energy costs, thereby further achieving negative carbon emissions, zero operating costs, or even negative costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the utility model or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0027] Figure 1 It is a structural schematic diagram of the utility model.

[0028] In the figure: 1-pretreatment tank, 1.1-discharge port of pretreatment tank, 1.2-submersible mixer, 1.3-pretreatment heating coil, 1.31-water outlet of heating coil, 1.32-water inlet of heating coil, 1.4-main feed pipe, 2.1-primary high concentration anaerobic fermentation device, 2.11-feed port 1, 2.12-discharge port 1, 2.13-heating coil 1, 2.131-water inlet 1, 2.132-water outlet 1, 2. 14-stirring motor 1, 2.2-secondary high-concentration anaerobic fermentation device, 2.21-feeding port 2, 2.22-heating coil 2, 2.221-water inlet 2, 2.222-water outlet 2, 2.23-stirring motor 2, 2.3-first main air pipe, 2.4-second main air pipe, 2.5-third main air pipe, 2.6-multi-way valve, 3.1-aerobic fermentation device, 3.2-aeration fan, 4.1-desulfurization device, 4.2-gas Water separator, 4.3-gas storage cabinet, 4.31-film blowing fan, 5.1-biogas hot air furnace, 5.2-solar air collector, 5.3-hot air blower, 5.4-organic fertilizer particle drying device, 6.1-biogas generator set, 6.2-solar power generation equipment, 6.3-power output module 1, 6.4-main cable, 6.5-power output module 2, 7.1-biogas boiler, 7.11-boiler return port, 7.12-boiler Water outlet, 7.2-hot water circulation pump 1, 7.3-solar water heater, 7.31-solar water return port, 7.32-solar water outlet, 7.4-hot water circulation pump 2, 7.5-water distributor, 7.6-water collector, 7.7-cold water main pipeline, 7.8-hot water main pipeline, 8-domestic gas supply unit, 9-emergency flare, 10.1-flotation machine, 10.2-biogas slurry concentration device, 11-solid-liquid separator, 12-intermediate water tank. DETAILED DESCRIPTION

[0029] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without creative work should fall within the scope of protection of the present invention.

[0030] like Figure 1 As shown, a multi-energy complementary resource utilization system for agricultural and rural organic waste includes a pretreatment unit, an anaerobic fermentation unit, a high-temperature aerobic composting fermentation unit, a biogas clarification treatment unit, a biogas purification and storage unit, a hot air drying unit, a power generation unit, a warming unit, a domestic gas supply unit 8 and an emergency torch 9.

[0031] The pretreatment unit comprises a pretreatment tank 1, in which a pretreatment tank discharge port 1.1, a submersible mixer 1.2 and a pretreatment heating coil 1.3 are arranged. The pretreatment heating coil 1.3 is provided with a heating coil water outlet 1.31 and a heating coil water inlet 1.32.

[0032] The anaerobic fermentation unit comprises a primary high-concentration anaerobic fermentation device 2.1 and a secondary high-concentration anaerobic fermentation device 2.2. The primary high-concentration anaerobic fermentation device 2.1 is provided with a feed inlet 2.11, a discharge port 2.12, a heating coil 2.13 and a stirring motor 2.14. The heating coil 2.13 is provided with a water inlet 2.131 and a water outlet 2.132. The secondary high-concentration anaerobic fermentation device 2.2 is provided with a feed inlet 2.21, a heating coil 2.22 and a stirring motor 2.23. The heating coil 2.22 is provided with a water inlet 2.221 and a water outlet 2.222. A solid-liquid separator 11 is arranged behind the secondary high-concentration anaerobic fermentation device 2.2.

[0033] After the organic mixture is anaerobic fermented, it is separated into biogas residue and biogas liquid by the solid-liquid separator 11. The biogas residue is transported to the aerobic fermentation device 3.1, and the biogas liquid enters the intermediate water tank 12.

[0034] The high temperature aerobic composting fermentation unit comprises an aerobic fermentation device 3.1 and an aeration fan 3.2.

[0035] The biogas slurry clarification treatment unit comprises an air floatation machine 10.1 and a biogas slurry concentration device 10.2. The air floatation machine 10.1 is connected to the intermediate water tank 12 before and is connected to the biogas slurry concentration device 10.2 after.

[0036] The biogas purification and storage unit comprises a desulfurization device 4.1, a gas-water separator 4.2 and a gas storage cabinet 4.3, and the gas storage cabinet 4.3 is provided with a film blowing fan 4.31.

[0037] The hot air drying unit comprises a biogas hot air furnace 5.1, a solar air collector 5.2, a hot air blower 5.3 and an organic fertilizer particle drying device 5.4.

[0038] The power generation unit comprises a biogas power generation set 6.1 and a solar power generation device 6.2.

[0039] The temperature increasing unit comprises a biogas boiler 7.1, a hot water circulation pump 1 7.2, a solar water heater 7.3, a hot water circulation pump 2 7.4, a water distributor 7.5 and a water collector 7.6.

[0040] The domestic gas supply unit 8 can be used for household cooking, heating, hot water, biogas lamps, vegetable greenhouse insulation, etc.

[0041] The pretreatment tank discharge port 1.1 is connected to the main feed pipe 1.4, the main feed pipe 1.4 is connected to the feed port 1 2.11, and the discharge port 1 2.12 is connected to the feed port 2 2.21 to form a feed pipeline system.

[0042] The primary high-concentration anaerobic fermentation device 2.1 and the secondary high-concentration anaerobic fermentation device 2.2 are both connected to the first main air pipe 2.3, the first main air pipe 2.3 is connected to the desulfurization device 4.1, the desulfurization device 4.1 is connected to the gas-water separator 4.2 through the second main air pipe 2.4, the gas-water separator 4.2 is connected to the gas storage cabinet 4.3 through the third main air pipe 2.5, and the gas storage cabinet 4.3 is respectively connected to the biogas hot air furnace 5.1, the biogas generator set 6.1, the biogas boiler 7.1, the life gas supply unit 8 and the emergency torch 9 through the multi-way valve 2.6 to form a biogas pipeline system.

[0043] The gas storage tank 4.3 is a double-membrane flexible gas storage tank.

[0044] The biogas hot air furnace 5.1 and the solar air collector 5.2 are connected in parallel and connected to a hot air blower 5.3, and the hot air blower 5.3 is connected to an organic fertilizer particle drying device 5.4.

[0045] The biogas generator set 6.1 is connected to the main cable 6.4 through the power output module 1 6.3, the solar power generation equipment 6.2 is connected to the main cable 6.4 through the power output module 2 6.5, and the main cable 6.4 is connected to the organic fertilizer particle drying device 5.4, the aeration fan 3.2, the film blowing fan 4.31, the hot air blower 5.3, the stirring motor 1 2.14, the biogas slurry concentration device 10.2, the stirring motor 2 2.23 and the submersible mixer 1.2 through the branch cables to form an internal power network.

[0046] The biogas boiler 7.1 is provided with a boiler water return port 7.11 and a boiler water outlet 7.12, and the solar water heater 7.3 is provided with a solar water return port 7.31 and a solar water outlet 7.32. The boiler water return port 7.11 and the solar water return port 7.31 are connected in parallel and connected to a water distributor 7.5. The water distributor 7.5 is connected to a hot water circulation pump 7.2, and the hot water circulation pump 7.2 is connected to a cold water main pipeline 7.7. A plurality of cold water branch pipelines are provided on the cold water main pipeline 7.7, and the cold water branch pipelines are respectively connected to the heating coil water outlet 1.31, the water outlet 2.132, The water outlet 2.222 is connected to form a cold water circulation pipeline; the boiler water outlet 7.12 and the solar water outlet 7.32 are connected in parallel and connected to the water collector 7.6, the water collector 7.6 is connected to the hot water circulation pump 2 7.4, the hot water circulation pump 2 7.4 is connected to the hot water main pipeline 7.8, and the hot water main pipeline 7.8 is provided with a plurality of hot water branch pipelines, which are respectively connected to the heating coil water inlet 1.32, the water inlet 1 2.131, and the water inlet 2 2.221 through each hot water branch pipeline to form a hot water circulation pipeline; the cold water circulation pipeline and the hot water circulation pipeline form a warming circulation system.

[0047] The emergency torch 9 is used in an emergency situation or when the equipment is under maintenance.

[0048] The working principle of the utility model is as follows: multi-raw material organic waste is synergistically pretreated to obtain a high-concentration organic mixture material, which then enters the first-level high-concentration anaerobic fermentation device and the second-level high-concentration anaerobic fermentation device in sequence. Through the multi-stage anaerobic fermentation mode, the organic matter is efficiently degraded and the energy problem is solved. The biogas produced by anaerobic fermentation is purified and stored for hot air drying, power generation, boiler heating, domestic gas supply, etc.; after anaerobic fermentation, the solid-liquid separator separates the biogas and biogas residue, and the biogas is used to produce concentrated biogas fertilizer or return to the field for irrigation; the biogas residue is used for aerobic composting and fermentation; the fermented and decomposed organic fertilizer can be sold or returned to the field for use after hot air drying. The electricity generated by biogas power generation can be used for electricity consumption in organic fertilizer production processes such as fertilizer particle drying devices, aeration fans, film blowing fans, hot air fans, stirring motors one, stirring motors two, and submersible mixers. It can also be used for the daily electricity consumption of surrounding residents and incorporated into the national power grid. Considering that the biogas yield may be affected by factors such as the fermentation environment, fermentation raw materials, and fermentation temperature, solar power generation, solar water heating, and solar hot air drying technologies are used together with biogas power generation, biogas boiler heating, and biogas drying. A complementary advantage model is adopted to achieve effective complementarity of the "light-electricity-gas-heat-fertilizer" multi-energy resources, thereby more comprehensively improving the operating efficiency and treatment effect of organic waste.

[0049] Although the present description is described in detail by referring to the accompanying drawings and in combination with the preferred embodiments, the present invention is not limited thereto. Without departing from the spirit and essence of the present invention, any person skilled in the art can easily think of changes and substitutions within the technical scope disclosed in the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A multi-energy complementary resource utilization system for agricultural and rural organic waste, characterized by: It includes pretreatment unit, anaerobic fermentation unit, high temperature aerobic composting fermentation unit, biogas clarification treatment unit, biogas purification and storage unit, hot air drying unit, power generation unit, heating unit, life gas supply unit and emergency flare; The pretreatment unit comprises a pretreatment tank, in which a pretreatment tank discharge port, a submersible mixer and a pretreatment heating coil are arranged, and the pretreatment heating coil is provided with a heating coil water outlet and a heating coil water inlet; The anaerobic fermentation unit comprises a primary high-concentration anaerobic fermentation device and a secondary high-concentration anaerobic fermentation device, wherein the primary high-concentration anaerobic fermentation device is provided with a first feed inlet, a first discharge port, a first heating coil and a first stirring motor, wherein the first heating coil is provided with a first water inlet and a first water outlet; the secondary high-concentration anaerobic fermentation device is provided with a second feed inlet, a second heating coil and a second stirring motor, wherein the second heating coil is provided with a second water inlet and a second water outlet; a solid-liquid separator is arranged behind the secondary high-concentration anaerobic fermentation device; After the organic mixture is anaerobic fermented, it is separated into biogas residue and biogas liquid by the solid-liquid separator; the biogas residue is transported to the aerobic fermentation device, and the biogas liquid enters the intermediate water tank; The high temperature aerobic composting fermentation unit includes an aerobic fermentation device and an aeration fan; The biogas slurry clarification treatment unit comprises an air flotation machine and a biogas slurry concentration device, the air flotation machine is connected to the intermediate water tank before, and the air flotation machine is connected to the biogas slurry concentration device after; The biogas purification and storage unit comprises a desulfurization device, a gas-water separator and a gas storage cabinet, and the gas storage cabinet is provided with a film blowing fan; The hot air drying unit comprises a biogas hot air furnace, a solar air collector, a hot air blower and an organic fertilizer particle drying device; The power generation unit includes a biogas generator set and a solar power generation device; The temperature increasing unit comprises a biogas boiler, a first hot water circulation pump, a solar water heater, a second hot water circulation pump, a water distributor and a water collector.

2. According to claim 1, a multi-energy complementary resource utilization system for agricultural and rural organic waste is characterized by: The discharge port of the pretreatment tank is connected with the main feed pipe, the main feed pipe is connected with the first feed port, and the first discharge port is connected with the second feed port to form a feed pipeline system.

3. According to claim 1, a multi-energy complementary resource utilization system for agricultural and rural organic waste is characterized by: The first-level high-concentration anaerobic fermentation device and the second-level high-concentration anaerobic fermentation device are both connected to the first main air pipe, the first main air pipe is connected to the desulfurization device, the desulfurization device is connected to the gas-water separator through the second main air pipe, the gas-water separator is connected to the gas storage cabinet through the third main air pipe, and the gas storage cabinet is respectively connected to the biogas hot air furnace, the biogas generator set, the biogas boiler, the domestic gas supply unit and the emergency torch through a multi-way valve to form a biogas pipeline system.

4. According to claim 3, a multi-energy complementary resource utilization system for agricultural and rural organic waste is characterized by: The gas storage tank is a double-membrane flexible gas storage tank.

5. According to claim 1, a multi-energy complementary resource utilization system for agricultural and rural organic waste is characterized by: The biogas hot air furnace and the solar air collector are connected in parallel and are communicated with a hot air blower, and the hot air blower is communicated with an organic fertilizer particle drying device.

6. The multi-energy complementary resource utilization system for agricultural and rural organic waste according to claim 1 is characterized by: The biogas generator set is connected to the main cable through the power output module 1; the solar power generation equipment is connected to the main cable through the power output module 2, and the main cable is connected to the organic fertilizer particle drying device, the aeration fan, the film blowing fan, the hot air blower, the biogas liquid concentration device, the stirring motor 1, the stirring motor 2 and the submersible mixer through the branch cables to form an internal power network.

7. The multi-energy complementary resource utilization system for agricultural and rural organic waste according to claim 1 is characterized by: The biogas boiler is provided with a boiler water return port and a boiler water outlet, and the solar water heater is provided with a solar water return port and a solar water outlet. The boiler water return port and the solar water return port are connected in parallel and are connected to a water distributor. The water distributor is connected to a hot water circulation pump 1, and the hot water circulation pump 1 is connected to a cold water main pipeline. A plurality of cold water branch pipes are provided on the cold water main pipeline, and the cold water branch pipes are respectively connected to the heating coil water outlet, the first water outlet, and the second water outlet to form a cold water circulation pipeline; the boiler water outlet and the solar water outlet are connected in parallel and are connected to a water collector, and the water collector is connected to a hot water circulation pump 2, and the hot water circulation pump 2 is connected to the hot water main pipeline. A plurality of hot water branch pipes are provided on the hot water main pipeline, and the hot water branch pipes are respectively connected to the heating coil water inlet, the first water inlet, and the second water inlet to form a hot water circulation pipeline; a warming circulation system is formed by the cold water circulation pipeline and the hot water circulation pipeline.

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