Large-scale agricultural sewage and wastewater in-situ hydrogen production and comprehensive utilization device

Abstract

The utility model discloses a large-scale agricultural sewage and wastewater in-situ hydrogen production and comprehensive utilization device, which belongs to the technical field of sewage and wastewater utilization, is arranged behind an agricultural sewage and wastewater pretreatment device and comprises an aerobic fermentation tank, a biochemical pool, a water treatment device, a water decomposition device, fuel cell agricultural equipment and hydrogen electricity agricultural equipment, waste residues and waste liquid of the agricultural wastewater pretreatment device are respectively connected with the aerobic fermentation tank and the biochemical pool through pipelines; the water treatment device is used for cleaning the waste liquid output by the biochemical pool; the water decomposition device is used for decomposing water to generate hydrogen and oxygen; the oxygen is supplied to the aerobic fermentation tank and the biochemical pool; the hydrogen is used for being supplied to fuel cell agricultural equipment and hydrogen electricity agricultural equipment. The large-scale agricultural sewage and wastewater in-situ hydrogen production and comprehensive utilization device can effectively solve the problems that in the prior art, resources contained in a large amount of sewage and wastewater in a large-scale farm are not fully utilized, so that the resources are wasted, and the like.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of sewage utilization, and particularly relates to a large-scale agricultural sewage hydrogen production in situ and comprehensive utilization device. BACKGROUND

[0002] With the development of economy and population growth, plus the relatively limited arable land, agricultural modernization is an inevitable trend of agricultural development. Among them, large-scale agricultural automation equipment is an important material basis for agricultural modernization, which can improve the accuracy, standardization and management level of agricultural production. From the perspective of large-scale farms, it has several typical characteristics: obvious economic benefits conducive to social development; environmental impact is large and concentrated; technical innovation has optimization and upgrading space.

[0003] The discharge of sewage in large-scale farms is affected by social development, and the discharge amount increases and the composition becomes complex. The existing sewage in large-scale farms is directly discharged after pretreatment to meet the discharge standard, and the resources contained therein are not fully utilized, causing waste of resources. The subsequent resources of the optimized sewage can be used as a breakthrough point for energy conservation and environmental protection. UTILITY MODEL CONTENT

[0004] The utility model aims at the above-mentioned insufficient place provides a kind of large-scale agricultural sewage hydrogen production in situ and comprehensive utilization device to solve the problem that the resources contained in the large amount of sewage in large-scale farms in prior art are not fully utilized, causing waste of resources and other problems. In order to realize the above-mentioned purpose, the utility model provides the following technical scheme:

[0005] A kind of large-scale agricultural sewage hydrogen production in situ and comprehensive utilization device is arranged after agricultural sewage pretreatment device, including aerobic fermentation tank, biochemical pool, water treatment device, water decomposition device, fuel cell agricultural equipment and hydrogen electric agricultural equipment;The waste residue and waste liquid of the agricultural sewage pretreatment device are connected with aerobic fermentation tank and biochemical pool by pipeline respectively;The waste residue and waste liquid of the biochemical pool are connected with aerobic fermentation tank and water treatment device by pipeline respectively;The water treatment device is used to clean the waste liquid output by biochemical pool;The water decomposition device is connected with water treatment device, and is used to decompose water to produce hydrogen and oxygen;The oxygen is used to supply aerobic fermentation tank and biochemical pool;The hydrogen is used to supply fuel cell agricultural equipment and hydrogen electric agricultural equipment.

[0006] Further, the water treatment device includes a heated raw water tank, a water supply pump, a membrane distillation assembly and a steam-water separation tank;The waste liquid output end of the biochemical pool is connected with the heated raw water tank by pipeline;The heated raw water tank, water supply pump, membrane distillation assembly and steam-water separation tank are connected by pipeline in sequence.

[0007] Further, the heating raw water tank and the membrane distillation assembly are connected by pipelines and provided with a first circulating pump.

[0008] Further, the water treatment device further comprises a condenser, a cooling water tank, a vacuum tank and a vacuum pump; the steam output end of the steam-water separation tank is connected with the condenser through a pipeline; the condenser is connected with the vacuum tank and the cooling water tank through pipelines respectively; the vacuum pump is connected with the vacuum tank and used for reducing the air pressure in the vacuum tank; the condenser and the cooling water tank are further connected through another pipeline and provided with a cooling water pump.

[0009] Further, the water decomposition device comprises a water electrolysis tank, a hydrogen storage tank and an oxygen storage tank; the vacuum tank is connected with the water electrolysis tank through a pipeline; the oxygen output end and the hydrogen output end of the water electrolysis tank are connected with the oxygen storage tank and the hydrogen storage tank respectively.

[0010] Further, the hydrogen storage tank is connected with the biochemical pool and the aerobic fermentation tank through pipelines respectively, and a blower is arranged on each pipeline.

[0011] Further, the hydrogen storage tank is connected with the fuel cell agricultural equipment and the hydrogen electric agricultural equipment through pipelines respectively.

[0012] Further, the system further comprises a wind power generation system, a solar power generation system, a storage battery and a control center; the control center controls the wind power generation system, the solar power generation system and the storage battery to complement each other and provide power for the blower and the water electrolysis tank continuously and stably.

[0013] Further, the wind power generation system comprises a plurality of wind power generators and an inverter; the plurality of wind power generators are electrically connected with the inverter; the inverter is electrically connected with the control center, the storage battery, the blower and the water electrolysis tank respectively.

[0014] Further, the solar power generation system comprises a plurality of photovoltaic panels and an inverter; the plurality of photovoltaic panels are electrically connected with the inverter; the inverter is electrically connected with the control center, the storage battery, the blower and the water electrolysis tank respectively.

[0015] The novel device has the advantages that: the novel device provides power for the water electrolysis tank and the blower by using the green energy of wind and solar energy, and fully utilizes the oxygen and hydrogen decomposed by the water electrolysis tank after purifying the sewage, realizes self-sufficiency by cooperating with the hydrogen fuel cell and the hydrogen electric agricultural equipment, fully utilizes the resources of the sewage, improves the agricultural production efficiency, and achieves the purpose of optimizing the energy structure. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a schematic view of the novel device;

[0017] In the figure: 1, biochemical pool; 2, heating raw water tank; 3, water supply pump; 4, membrane distillation assembly; 5, steam-water separation tank; 6, condenser; 7, vacuum tank; 8, vacuum pump; 9, cooling water tank; 10, cooling water pump; 11, PEM electrolytic cell; 12, oxygen storage tank; 13, hydrogen storage tank; 14, fuel cell; 15, air blower; 16, photovoltaic panel; 17, wind turbine; 18, inverter; 19, control center; 20, battery; 21, inflation valve; 22, hydrogen-electric unmanned aerial vehicle; 23, hydrogen-electric agricultural machinery; 24, aerobic fermentation tank. DETAILED DESCRIPTION

[0018] The utility model will be further explained in detail below in combination with the drawings and specific embodiments. In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme of the embodiments of the utility model will be clearly and completely described below in combination with the drawings of the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. The components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the utility model provided in the drawings is not intended to limit the scope of the claimed utility model, but only represents selected embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0019] It should be noted that similar reference numerals and letters refer to similar items in the following drawings, and therefore, once an item is defined in one drawing, it need not be further defined and explained in subsequent drawings. In the description of the present application, it should be explained that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present application is usually placed during use, and are merely for the convenience of describing the present application and simplifying the description, and therefore, cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore, cannot be understood as limiting the present application. In addition, the terms "first", "second", "third", and the like are only used to distinguish the description, and cannot be understood as indicating or implying relative importance. In addition, the terms "horizontal", "vertical", and the like do not mean that the components must be absolutely horizontal or vertical, but can be slightly inclined. For example, "horizontal" only means that its direction is relatively more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined. In the description of the present application, it should be explained that, unless otherwise explicitly specified and limited, the terms "provided", "mounted", "connected", "linked" should be understood broadly, for example, can be fixedly connected, can be detachably connected, or integrally connected; can be mechanically connected, can be electrically connected; can be directly connected, can be indirectly connected through an intermediate medium, or can be connected inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0020] Embodiment:

[0021] As Figure 1As shown, a large-scale agricultural waste water in-situ hydrogen production and comprehensive utilization device, after pretreatment by the agricultural waste water pretreatment device, the remaining waste residue and waste liquid are fully utilized, wherein the agricultural waste water pretreatment device is understood by those skilled in the art. The solid waste residue output by the agricultural waste water pretreatment device is transported to the aerobic fermentation tank 24 for fermentation. The organic waste residue after pretreatment is loaded into the compost tank for aerobic fermentation. Oxygen is provided through the ventilation system, and the temperature in the tank is increased through heating or natural fermentation to promote microbial activity. At the same time, the stirring device is used regularly to turn the material to ensure uniform fermentation and improve compost quality. According to the needs, the compost is subjected to post-processing such as screening and drying to obtain higher quality organic fertilizer. The waste liquid output by the agricultural waste water pretreatment device is further reacted in the biochemical tank 1. The preferred biochemical tank 1 uses an A2O treatment device, and its working process includes the following stages: anaerobic stage: the pretreated wastewater and the backflow sludge in the sedimentation tank enter for anaerobic decomposition to remove part of the BOD, convert nitrogen compounds, and release phosphorus by polyphosphorus bacteria. Anoxic stage: denitrifying bacteria use organic matter as carbon source to reduce nitrate in the backflow mixed liquid to N2 for release. Aerobic stage: nitration reaction is carried out to generate nitrate; organic matter is oxidized and decomposed to provide energy for phosphorus-absorbing microorganisms, and the microorganisms absorb phosphorus. Sedimentation tank: the function is solid-liquid separation, and the waste liquid is treated and utilized by the water treatment device, and the solid waste residue is transported to the aerobic fermentation tank 24 for treatment.

[0022] The water treatment device specifically includes a heating raw water tank 2, a water supply pump 3, a membrane distillation assembly 4, a vapor-liquid separation tank 5, a condenser 6, a cooling water tank 9, a vacuum tank 7, and a vacuum pump 8. The waste liquid separated by the sedimentation tank enters the heating raw water tank 2. The outlet of the heating raw water tank 2 is connected to the water supply pump 3. The water supply pump 3 mainly connects the heated waste liquid to the lower part of the membrane distillation assembly 4. The upper part of the membrane distillation assembly 4 is connected to the first circulating pump, so that part of the waste liquid in the membrane distillation assembly 4 is circulated and purified in the heating water tank. At the same time, the lower part of the membrane distillation assembly 4 is connected to the vapor-liquid separation tank 5, so that the vapor enters the condenser 6 after passing through the vapor-liquid separation tank 5 to complete the evaporation and filtration of the wastewater. The cooling water in the condenser 6 is connected to the cooling water tank 9 through the cooling water pump 10. The cooling water tank 9 and the cooling water pump 10 provide cooling water and water vapor heat exchange for the condenser 6 circulation. After the water vapor heat exchange and condensation, it flows into the vacuum tank 7, and then enters the water electrolysis tank for electrolysis reaction. The vacuum tank 7 also serves as a storage for purified water. The vacuum pump 8 can form a vacuum state in the membrane distillation assembly, so that the boiling point of water can be further reduced, and the distillation effect can be faster.

[0023] The water decomposition device comprises a water electrolysis tank, preferably a PEM electrolysis tank 11, and a hydrogen storage tank 13 and an oxygen storage tank 12. The PEM electrolytic water device electrolyzes water to generate oxygen and hydrogen, the oxygen is stored in the oxygen storage tank 12, the oxygen storage tank 12 is powered by a blower 15 through a pipeline connected with the aerobic fermentation tank 24 and the biochemical tank 1, the hydrogen is stored in the hydrogen storage tank 13 through compression, the hydrogen storage tank 13 provides hydrogen energy for hydrogen energy fuel cell 14 agricultural equipment and hydrogen electric agricultural equipment, and the hydrogen energy fuel cell 14 agricultural equipment specifically includes agricultural equipment driven by the hydrogen energy fuel cell 14, which can directly provide energy by hydrogen, the hydrogen fuel cell 14 has high energy conversion efficiency and endurance, under the same energy input, the hydrogen energy driven equipment can output more useful work, improve the energy utilization efficiency, and further improve the agricultural production efficiency, reduce the operation cost of the equipment, and reduce the energy consumption. The hydrogen electric agricultural equipment can be hydrogen electric unmanned aerial vehicle 22 and hydrogen electric agricultural machinery 23, and the hydrogen storage tank 13 is connected with a plurality of inflation valves 21 through a pipeline, which are used for matching the inflation of the hydrogen electric unmanned aerial vehicle 22 and the hydrogen electric agricultural machinery 23, so that the hydrogen electric unmanned aerial vehicle 22 and the hydrogen electric agricultural machinery 23 can complete energy supplement in a short time, reduce the downtime of the equipment, and further improve the utilization rate and production efficiency of the equipment. At the same time, the noise is relatively low during operation, which can provide a quieter working environment for agricultural production, improve the working comfort, be beneficial to the health of the operator, reduce the noise pollution, and be beneficial to the balance of the agricultural ecology.

[0024] The wind power generation system and the solar power generation system are cooperatively distributed between the cooperation control center 19, and specifically divided into the following two modes: the first control mode - when the light is sufficient, the green power generation is mainly based on the photovoltaic panel 16, the blower 15 and the water electrolysis tank are powered, the storage battery 20 absorbs and stores the excess electric energy, and the performance is charging mode; the second control mode - when the light is insufficient, the green power generation is mainly based on wind energy, the storage battery 20 releases the stored electric energy to supplement the electric energy, and the performance is discharging mode. The inverter 18 connected with the photovoltaic panel 16 is a DC-DC type inverter 18; the inverter 18 connected with the wind driven generator 17 is an AC-DC type inverter 18.

[0025] The cooperation control center 19 achieves the effect of stable output constant voltage through the two control modes, and can also control the start and stop of the PEM electrolysis tank 11, the PEM electrolysis tank 11 works in the daytime, cooperates with the farm sewage purification process, and stops working at night.

[0026] The preferred embodiments are only used to illustrate the present application, and do not limit the patent range of the present application, and any equivalent structure or equivalent process transformation in the content of the present application, or direct or indirect application in other related technical fields, are also included in the patent protection range of the present application.

Claims

1. A device for hydrogen production and comprehensive utilization of large-scale agricultural wastewater in situ, which is arranged after an agricultural wastewater pretreatment device, characterized in that: The agricultural waste water pretreatment device includes an aerobic fermentation tank (24), a biochemical tank (1), a water treatment device, a water decomposition device, a fuel cell (14) agricultural equipment and a hydrogen electricity agricultural equipment; waste residues and waste liquid of the agricultural waste water pretreatment device are connected with the aerobic fermentation tank (24) and the biochemical tank (1) through pipelines respectively; waste residues and waste liquid of the biochemical tank (1) are connected with the aerobic fermentation tank (24) and the water treatment device through pipelines respectively; the water treatment device is used for cleaning treatment of waste liquid output by the biochemical tank (1); the water decomposition device is connected with the water treatment device and is used for water decomposition to generate hydrogen and oxygen; the oxygen is used for supplying the aerobic fermentation tank (24) and the biochemical tank (1); the hydrogen is used for supplying the fuel cell (14) agricultural equipment and the hydrogen electricity agricultural equipment.

2. The device for in-situ hydrogen production and comprehensive utilization of large-scale agricultural wastewater according to claim 1, characterized in that: The water treatment device includes a raw water heating tank (2), a water supply pump (3), a membrane distillation assembly (4) and a steam-water separation tank (5); a waste liquid output end of the biochemical tank (1) is connected with the raw water heating tank (2) through a pipeline; the raw water heating tank (2), the water supply pump (3), the membrane distillation assembly (4) and the steam-water separation tank (5) are sequentially connected through pipelines.

3. The device for in-situ hydrogen production and comprehensive utilization of large-scale agricultural wastewater according to claim 2, characterized in that: A first circulating pump is arranged between the raw water heating tank (2) and the membrane distillation assembly (4) and connected through a pipeline.

4. The device for in-situ hydrogen production and comprehensive utilization of large-scale agricultural wastewater according to claim 3, characterized in that: The water treatment device further includes a condenser (6), a cooling water tank (9), a vacuum tank (7) and a vacuum pump (8); a steam output end of the steam-water separation tank (5) is connected with the condenser (6) through a pipeline; the condenser (6) is connected with the vacuum tank (7) and the cooling water tank (9) through pipelines respectively; the vacuum pump (8) is connected with the vacuum tank (7) and is used for reducing the air pressure in the vacuum tank (7); the condenser (6) and the cooling water tank (9) are further connected through another pipeline and are provided with a cooling water pump (10).

5. The device for in-situ hydrogen production and comprehensive utilization of large-scale agricultural wastewater according to claim 4, characterized in that: The water decomposition device includes a water electrolysis tank, a hydrogen storage tank (13) and an oxygen storage tank (12); the vacuum tank (7) is connected with the water electrolysis tank through a pipeline; an oxygen output end and a hydrogen output end of the water electrolysis tank are connected with the oxygen storage tank (12) and the hydrogen storage tank (13) respectively.

6. The device for in-situ hydrogen production and comprehensive utilization of large-scale agricultural wastewater according to claim 5, characterized in that: The hydrogen storage tank (13) is connected with the biochemical tank (1) and the aerobic fermentation tank (24) through pipelines respectively, and a blower (15) is arranged on each pipeline.

7. The device for in-situ hydrogen production and comprehensive utilization of large-scale agricultural wastewater according to claim 6, characterized in that: The hydrogen storage tank (13) is connected with the fuel cell (14) agricultural equipment and the hydrogen electricity agricultural equipment through pipelines respectively.

8. The device for in-situ hydrogen production and comprehensive utilization of large-scale agricultural wastewater according to claim 7, characterized in that: A wind power generation system, a solar power generation system, a storage battery (20) and a control center (19) are further included; the control center (19) controls the wind power generation system, the solar power generation system and the storage battery (20) to be complementary to each other, so as to continuously and stably provide power for the blower (15) and the water electrolysis tank.

9. The device for in-situ hydrogen production and comprehensive utilization of large-scale agricultural wastewater according to claim 8, characterized in that: The wind power generation system includes a plurality of wind power generators (17) and an inverter (18); the plurality of wind power generators (17) are electrically connected with the inverter (18); the inverter (18) is electrically connected with the control center (19), the storage battery (20), the blower (15) and the water electrolysis tank respectively.

10. The device for in-situ hydrogen production and comprehensive utilization of large-scale agricultural wastewater according to claim 9, characterized in that: The solar power generation system comprises a plurality of photovoltaic panels (16) and inverters (18); a plurality of the photovoltaic panels (16) are electrically connected with the inverters (18); the inverters (18) are respectively electrically connected with a control center (19), a storage battery (20), a blower (15) and a water electrolysis cell.

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