Device and method for producing hydrogen from agricultural wastewater

Abstract

The invention relates to the technical field of hydrogen production, in particular to a device and a method for producing hydrogen from agricultural wastewater. The agricultural wastewater hydrogen production device comprises a pretreatment mechanism, a heating mechanism and a hydrogen production mechanism, a crushing mechanism, a filtering mechanism and a stirring mechanism are fixedly mounted on the pretreatment mechanism, and a siphon mechanism for siphoning water treated by the pretreatment mechanism to the heating mechanism for heating is mounted between the pretreatment mechanism and the heating mechanism; and a condensation mechanism for condensing water vapor heated by the heating mechanism to the hydrogen production mechanism for hydrogen production is mounted between the heating mechanism and the hydrogen production mechanism, so that pretreatment of wastewater is realized, the purity of hydrogen in the subsequent hydrogen production process is conveniently improved, and recycling of resources is realized.

Description

Technical Field

[0001] The invention relates to the technical field of hydrogen production, and in particular to an agricultural wastewater hydrogen production device and a method thereof. Background Art

[0002] Hydrogen production is the process of producing hydrogen. Hydrogen energy is a secondary energy source. In the long run, producing hydrogen from water is the most promising method. The raw materials are inexhaustible, and hydrogen generates water after releasing energy after combustion, which does not cause environmental pollution. Commonly used hydrogen production methods include hydrogen production from various mineral fuels, hydrogen production from water electrolysis, hydrogen production from biomass, hydrogen production from other hydrogen-containing substances, and recovery of hydrogen produced as a by-product of various chemical processes. Hydrogen was first artificially synthesized in the early sixteenth century. The method used at that time was to place metals in strong acids to produce water during combustion. At room temperature and pressure, hydrogen is an extremely flammable, colorless, transparent, odorless and tasteless gas. As an energy source, hydrogen has attracted more and more attention. Hydrogen itself is non-toxic, and the heat released by complete combustion is about twice that of the same mass of methane. It is considered to be an ideal clean, high-energy fuel. At present, as a high-energy fuel, liquid hydrogen has been used in aerospace and other fields. As a chemical power source, hydrogen-oxygen fuel cells have been used, such as as a driving energy source for automobiles.

[0003] At present, with the rapid development of the economy, the amount of agricultural wastewater is becoming larger and larger. Direct discharge into the environment will cause serious environmental pollution. The production and use costs of wastewater treatment equipment are high, which wastes resources. Therefore, wastewater can be used to produce hydrogen, but the existing wastewater hydrogen production device lacks a pretreatment structure and is prone to the following problems: 1. When in use, the solid organic matter in the wastewater is difficult to be directly and effectively utilized, affecting the efficiency of hydrogen production; 2. It is easy to cause damage to the hydrogen production equipment and affect the service life of the wastewater hydrogen production device; 3. The wastewater contains waste gas, which often affects the purity of the hydrogen.

[0004] Therefore, there is an urgent need for an agricultural wastewater hydrogen production device and method to solve the above problems. Summary of the invention

[0005] The purpose of the present invention is to solve at least one of the technical problems existing in the prior art and to provide an agricultural wastewater hydrogen production device and method.

[0006] To achieve the above purpose, the technical solution adopted by the present invention is as follows: an agricultural wastewater hydrogen production device, comprising

[0007] A pretreatment mechanism, the pretreatment mechanism comprising a pretreatment tank, the inner cavity of which is fixedly provided with a crushing mechanism, a filtering mechanism, and a stirring mechanism, the upper left side of the pretreatment tank is connected with a first slag discharge pipe, a rotating cover is provided on the left side of the first slag discharge pipe, and the filtering mechanism is arranged opposite to the first slag discharge pipe;

[0008] A heating mechanism is installed below the right side of the pretreatment mechanism, and a siphon mechanism is installed between the pretreatment mechanism and the heating mechanism for siphoning the treated water of the pretreatment mechanism to the heating mechanism for heating, the siphon mechanism includes a siphon tube, and an extrusion air bag is provided on the siphon tube;

[0009] The hydrogen production mechanism is horizontally installed on the right side of the heating mechanism, and a condensing mechanism is installed between the heating mechanism and the hydrogen production mechanism for condensing the water vapor heated by the heating mechanism to the hydrogen production mechanism for hydrogen production. The condensing mechanism includes a condenser, and the condenser is provided with a cooling water inlet pipe, an outlet pipe and an exhaust gas discharge pipe.

[0010] Furthermore, the crushing mechanism includes a first crushing roller mounted on the pretreatment tank through a bearing, a second crushing roller is mounted on one side of the first crushing roller through a bearing, a first belt pulley is fixed to one end of the first crushing roller through a pin, a second belt pulley is fixed to one end of the second crushing roller through a pin, the first belt pulley and the second belt pulley are both located outside the pretreatment tank, the first belt pulley and the second belt pulley are connected through a belt drive, a first motor is mounted on one end of the pretreatment tank through a mounting frame, and an output shaft on one side of the first motor is fixed to the second belt pulley through a pin.

[0011] Furthermore, the stirring mechanism includes a second motor installed at the bottom of the pretreatment tank, the output end of the second motor is connected to a second rotating shaft through a bearing, a stirring rod is installed on the second rotating shaft, and the second rotating shaft is arranged obliquely in the reaction tank.

[0012] Furthermore, the filtering mechanism comprises a filter screen plate, and the filter screen plate is obliquely installed in the inner cavity of the pretreatment tank.

[0013] Furthermore, it also includes a cleaning mechanism, which is located on the filtering mechanism and is used to clean the garbage on the filtering mechanism to the first slag discharge pipe; the cleaning mechanism includes a third motor, the output end of the third motor is fixedly connected to a threaded rod, a moving block is threadedly connected to the threaded rod, and a brush adapted to the filter mesh plate is installed on the surface of the moving block.

[0014] Furthermore, a second slag discharge pipe is connected to the lower left side of the pretreatment tank, a first exhaust pipe is connected to the upper right end of the pretreatment tank, and a wedge-shaped base is provided at the bottom of the inner cavity of the pretreatment tank, and the wedge-shaped base is connected to the second slag discharge pipe.

[0015] Furthermore, the heating mechanism includes a heating tank, a heating rod is provided on the top of the inner cavity of the heating tank, the output end of the siphon tube is connected to the heating tank, the input end of the siphon tube is connected to the pretreatment tank, and the input end of the siphon tube is connected to a filter head, and the filter head is located in the pretreatment tank; the bottom of the right side of the heating tank is connected to a sewage pipe, and a rotating cover is provided on the right side of the sewage pipe.

[0016] Furthermore, the hydrogen production mechanism includes a hydrogen production tank, on which a positive electrode and a negative electrode are installed, and the positive electrode and the negative electrode are connected to a power supply; the hydrogen production tank is provided with a second exhaust pipe, and the second exhaust pipe is connected to a gas collection tank.

[0017] A method for producing hydrogen from agricultural wastewater, using the above agricultural wastewater hydrogen production device, the method comprising:

[0018] S1. Inject agricultural wastewater into the pretreatment tank through the water injection pipe, and add the agent into the pretreatment tank along the water injection pipe. Under the action of the crushing mechanism, the impurities in the agricultural wastewater are crushed, and then the impurities in the wastewater after the crushing treatment are filtered. Turn on the second motor to drive the stirring rod to rotate, so that the sewage and the drug are quickly mixed to accelerate flocculation;

[0019] S2, squeeze the squeezing air bag on the siphon tube, so that the sewage is filtered by the filter head and then injected into the heating box along the siphon tube, and turn on the heating rod to heat the sewage, and the steam enters the condenser along the pipeline for condensation;

[0020] S3. The condensed water is injected into the hydrogen production tank along the pipeline and electrically connected to the electrodes so that the wastewater is electrolyzed to obtain hydrogen.

[0021] Furthermore, it also includes starting the third motor to drive the threaded rod to rotate so that the moving block moves on the threaded rod, so that the moving block drives the brush to move up and down to sweep the debris on the filter screen plate to the first slag discharge pipe, thereby cleaning the debris on the filter screen plate.

[0022] It can be seen from the above description of the present invention that, compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. The present application sets up a pretreatment mechanism, which includes a pretreatment tank. The inner cavity of the pretreatment tank is fixedly equipped with a crushing mechanism, a filtering mechanism, and a stirring mechanism, which can pretreat the sewage. The crushing mechanism is turned on to crush the solid organic matter in the wastewater and filter it, so that the slag discharge pipe is not easily blocked. The stirring motor is turned on to drive the stirring rod to rotate, which can accelerate the mixing of sewage and drugs and make the sewage flocculate quickly.

[0024] 2. This application can evaporate the sewage by setting up a heating mechanism. The waste gas will be discharged from the wastewater and flow into the condenser along with the water vapor. The water vapor will be cooled by the condenser in conjunction with a cooling device. The water vapor condenses and remains in the condenser, and the waste gas is discharged into a collection tank, thereby reducing the waste gas in the wastewater and helping to improve the purity of hydrogen in the subsequent hydrogen production process.

[0025] 3. The present application squeezes the air bag so that the siphon tube siphons the treated water from the pretreatment mechanism to the heating mechanism for heating, thereby facilitating operation.

[0026] 4. This application sets up a hydrogen production mechanism to process the wastewater that has passed through the pretreatment mechanism and the heating mechanism for hydrogen production, thereby realizing the recycling of resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the structure of an agricultural wastewater hydrogen production device in a preferred embodiment of the present invention;

[0028] Figure 2 A cross-sectional view of a pretreatment mechanism in a preferred embodiment of the present invention;

[0029] Figure 3 A cross-sectional view of a heating mechanism in a preferred embodiment of the present invention;

[0030] Figure 4 A cross-sectional view of a hydrogen production mechanism in a preferred embodiment of the present invention.

[0031] Reference numerals: 1. pretreatment tank;

[0032] 2. Crushing mechanism; 201. First crushing roller; 202. Second crushing roller; 203. First belt pulley; 204. Second belt pulley; 205. Belt; 206. First motor;

[0033] 3. Filter mechanism;

[0034] 4. stirring mechanism; 401. second motor; 402. second rotating shaft; 403. stirring rod;

[0035] 5. The first slag discharge pipe;

[0036] 6. siphon mechanism; 601; siphon tube; 602; air bag;

[0037] 7. Heating mechanism; 701. Heating tank; 702. Heating rod; 703. Drain pipe;

[0038] 8. Hydrogen production mechanism; 801. Hydrogen production tank; 802. Positive electrode; 803. Negative electrode; 804. Second exhaust pipe; 805. Collection tank;

[0039] 9. Condenser;

[0040] 10. Cleaning mechanism; 1001. Third motor; 1002. Threaded rod; 1003. Moving block;

[0041] 11. The second slag discharge pipe; 12. The first exhaust pipe. DETAILED DESCRIPTION

[0042] The technical solutions in the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0043] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] Reference Figure 1-4 As shown, a preferred embodiment of the present invention, an agricultural wastewater hydrogen production device, comprises

[0045] A pretreatment mechanism, the pretreatment mechanism comprises a pretreatment tank 1, the inner cavity of the pretreatment tank 1 is fixedly installed with a crushing mechanism 2, a filtering mechanism 3, and a stirring mechanism 4, the upper left side of the pretreatment tank 1 is connected with a first slag discharge pipe 5, the left side of the first slag discharge pipe 5 is provided with a rotating cover, the filtering mechanism 3 and the first slag discharge pipe 5 are arranged oppositely, so that the sewage can be pretreated, the crushing mechanism is turned on to crush the solid organic matter in the wastewater, and the slag discharge pipe is not easy to be blocked, and the stirring motor is turned on to drive the stirring rod to rotate, which can accelerate the mixing of sewage and medicine and make the sewage flocculate quickly;

[0046] The heating mechanism 7 is installed at the lower right side of the pretreatment mechanism, and a siphon mechanism 6 is installed between the pretreatment mechanism and the heating mechanism for siphoning the treated water of the pretreatment mechanism to the heating mechanism 7 for heating. The siphon mechanism 6 includes a siphon tube 601, and an extrusion air bag 602 is provided on the siphon tube 601. By squeezing the air bag, the siphon tube siphons the treated water of the pretreatment mechanism to the heating mechanism for heating, thereby facilitating people to operate;

[0047] At the same time, the heating mechanism 7 can evaporate the sewage, and the waste gas will be discharged from the waste water and flow into the condenser with the water vapor. The condenser cooperates with the cooling device to cool the water vapor. The water vapor condenses and remains in the condenser, and the waste gas is discharged into the collection tank, reducing the waste gas in the waste water, which is beneficial to improve the purity of hydrogen in the subsequent hydrogen production process;

[0048] The hydrogen production mechanism 8 is horizontally installed on the right side of the heating mechanism 7, and a condensing mechanism is installed between the heating mechanism 7 and the hydrogen production mechanism 8 for condensing the water vapor heated by the heating mechanism 7 to the hydrogen production mechanism 8 for hydrogen production. The condensing mechanism includes a condenser 9, and the condenser 9 is provided with a cooling water inlet pipe, an outlet pipe and an exhaust gas discharge pipe, so as to realize the pretreatment of the wastewater, facilitate the improvement of the purity of the hydrogen in the subsequent hydrogen production process, and realize the recycling of resources.

[0049] As a preferred embodiment of the present invention, it may also have the following additional technical features: the crushing mechanism 2 includes a first crushing roller 201 mounted on the pretreatment tank through a bearing, a second crushing roller 202 is mounted on one side of the first crushing roller 201 through a bearing, a first belt pulley 203 is fixed to one end of the first crushing roller 201 through a latch, a second belt pulley 204 is fixed to one end of the second crushing roller 202 through a latch, the first belt pulley 203 and the second belt pulley 204 are both located outside the pretreatment tank 1, the first belt pulley 203 and the second belt pulley 204 are connected by a belt 205, a first motor 206 is mounted on one end of the pretreatment tank 1 through a mounting frame, and an output shaft on one side of the first motor 206 is fixed to the second belt pulley 204 through a latch. Thus, the first motor 206 is started to drive the second belt pulley 204 to rotate, and the first belt pulley 203 is driven to rotate, thereby driving the first crushing roller 201 and the second crushing roller 202 to rotate, and the garbage in the wastewater is crushed, so that the slag discharge pipe is not easily blocked.

[0050] In this embodiment, the stirring mechanism 4 includes a second motor 401 installed at the bottom of the pretreatment tank 1, the output end of the second motor 401 is connected to a second rotating shaft 402 through a bearing, a stirring rod 403 is installed on the second rotating shaft 402, and the second rotating shaft 402 is arranged obliquely in the reaction tank 1. Therefore, by starting the stirring motor to drive the stirring rod to rotate, the mixing of sewage and medicine is accelerated, so that the sewage is quickly flocculated.

[0051] In this embodiment, the filtering mechanism 3 includes a filter screen plate, and the filter screen plate is obliquely installed in the inner cavity of the pretreatment tank 1. Thus, the broken impurities can be filtered.

[0052] In this embodiment, a cleaning mechanism 10 is also included. The cleaning mechanism 10 is located on the filter mechanism 3 and is used to clean the garbage on the filter mechanism 3 to the first slag discharge pipe 5. The cleaning mechanism 10 includes a third motor 1001. The output end of the third motor 1001 is fixedly connected to a threaded rod 1002. A moving block 1003 is threadedly connected to the threaded rod 1002. A brush adapted to the filter screen is installed on the surface of the moving block 1003. Therefore, when the debris on the filter screen needs to be cleaned, the third motor 1001 is started to drive the threaded rod 1002 to rotate so that the moving block 1003 moves up and down, so that the moving block 1003 drives the brush to move up and down to sweep the debris on the filter screen to the first slag discharge pipe 5, so as to clean the debris on the first filter screen 5 and avoid clogging of the filter screen. The moving block of this embodiment moves up and down. According to the existing technology, when the motor rotates forward, the threaded rod 1002 is driven to rotate forward under the action of the bearing, so that the moving block 1003 moves downward; when the motor rotates reversely, the threaded rod 1002 is driven to rotate reversely under the action of the bearing, so that the moving block 1003 moves upward.

[0053] In this embodiment, the lower left side of the pretreatment tank 1 is connected to a second slag discharge pipe 11, the upper right side of the pretreatment tank 1 is connected to a first exhaust pipe 12, and a wedge-shaped base is provided at the bottom of the inner cavity of the pretreatment tank 1, and the wedge-shaped base is connected to the second slag discharge pipe 11. In this way, impurities after flocculation treatment are cleaned.

[0054] In this embodiment, the heating mechanism 7 includes a heating tank 701, a heating rod 702 is provided at the top of the inner cavity of the heating tank 701, the output end of the siphon tube 601 is connected to the heating tank 701, the input end of the siphon tube 601 is connected to the pretreatment tank 1, and the input end of the siphon tube 601 is connected to a filter head, and the filter head is located in the pretreatment tank 1; the bottom of the right side of the heating tank 701 is connected to a sewage pipe 703, and a rotating cover is provided on the right side of the sewage pipe 703. Thus, by squeezing the air bag, the siphon 601 draws the sewage out of the pretreatment tank 1, and the filter head can filter the sewage to prevent debris from entering the siphon 601; and the heating rod 702 can evaporate the sewage, and the exhaust gas will be discharged from the wastewater and flow into the condenser with the water vapor. The water vapor is cooled by the condenser in conjunction with the cooling device. The water vapor condenses and remains in the condenser, and the exhaust gas is discharged into the collection tank, thereby reducing the exhaust gas in the wastewater, which is beneficial to improving the purity of hydrogen in the subsequent hydrogen production process.

[0055] In this embodiment, the hydrogen production mechanism 8 includes a hydrogen production tank 801, on which a positive electrode 802 and a negative electrode 803 are installed, and a power source is connected to the positive electrode 802 and the negative electrode 803; the hydrogen production tank 801 is provided with a second exhaust pipe 804, and the second exhaust pipe 804 is connected to a gas collection tank 805. Thus, hydrogen production treatment of wastewater is achieved, thereby realizing resource recycling.

[0056] A method for producing hydrogen from agricultural wastewater, using the above agricultural wastewater hydrogen production device, the method comprising:

[0057] S1. Inject agricultural wastewater into the pretreatment tank through the water injection pipe, and add the agent into the pretreatment tank along the water injection pipe. Under the action of the crushing mechanism, the impurities in the agricultural wastewater are crushed, and then the impurities in the wastewater after the crushing treatment are filtered. Turn on the second motor to drive the stirring rod to rotate, so that the sewage and the drug are quickly mixed to accelerate flocculation;

[0058] S2, squeeze the squeezing air bag on the siphon tube, so that the sewage is filtered by the filter head and then injected into the heating box along the siphon tube, and turn on the heating rod to heat the sewage, and the steam enters the condenser along the pipeline for condensation;

[0059] S3. The condensed water is injected into the hydrogen production tank along the pipeline and electrically connected to the electrodes so that the wastewater is electrolyzed to obtain hydrogen, thereby realizing the recycling of wastewater resources.

[0060] In this embodiment, the third motor is also started to drive the threaded rod to rotate so that the moving block moves on the threaded rod, so that the moving block drives the brush to move up and down to sweep the debris on the filter screen plate to the first slag discharge pipe, thereby cleaning the debris on the filter screen plate and avoiding blockage of the slag discharge port.

[0061] Under the premise that no conflict occurs, those skilled in the art may freely combine and superimpose the above-mentioned additional technical features.

[0062] It is to be understood that the present invention is described by some embodiments, and it is known to those skilled in the art that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the scope of protection of the present invention.

Claims

1. A hydrogen production device for agricultural wastewater, characterized in that: include A pretreatment mechanism, the pretreatment mechanism comprising a pretreatment tank, the inner cavity of which is fixedly provided with a crushing mechanism, a filtering mechanism, and a stirring mechanism, the upper left side of the pretreatment tank is connected with a first slag discharge pipe, a rotating cover is provided on the left side of the first slag discharge pipe, and the filtering mechanism is arranged opposite to the first slag discharge pipe; A heating mechanism is installed below the right side of the pretreatment mechanism, and a siphon mechanism is installed between the pretreatment mechanism and the heating mechanism for siphoning the treated water of the pretreatment mechanism to the heating mechanism for heating, the siphon mechanism includes a siphon tube, and an extrusion air bag is provided on the siphon tube; The hydrogen production mechanism is horizontally installed on the right side of the heating mechanism, and a condensing mechanism is installed between the heating mechanism and the hydrogen production mechanism for condensing the water vapor heated by the heating mechanism to the hydrogen production mechanism for hydrogen production. The condensing mechanism includes a condenser, and the condenser is provided with a cooling water inlet and outlet.

2. The agricultural wastewater hydrogen production device according to claim 1, characterized in that: The crushing mechanism includes a first crushing roller mounted on the pretreatment tank through a bearing, a second crushing roller is mounted on one side of the first crushing roller through a bearing, a first belt pulley is fixed to one end of the first crushing roller through a latch, a second belt pulley is fixed to one end of the second crushing roller through a latch, the first belt pulley and the second belt pulley are both located outside the pretreatment tank, the first belt pulley and the second belt pulley are connected through a belt drive, a first motor is mounted on one end of the pretreatment tank through a mounting frame, and an output shaft on one side of the first motor is fixed to the second belt pulley through a latch.

3. The agricultural wastewater hydrogen production device according to claim 1, characterized in that: The stirring mechanism comprises a second motor installed at the bottom of the pretreatment tank, the output end of the second motor is connected to a second rotating shaft through a bearing, a stirring rod is installed on the second rotating shaft, and the second rotating shaft is arranged obliquely in the reaction tank.

4. The agricultural wastewater hydrogen production device according to claim 1, characterized in that: The filtering mechanism comprises a filter screen plate, and the filter screen plate is obliquely installed in the inner cavity of the pretreatment tank.

5. The agricultural wastewater hydrogen production device according to claim 4, characterized in that: It also includes a cleaning mechanism, which is located on the filtering mechanism and is used to clean the garbage on the filtering mechanism to the first slag discharge pipe; the cleaning mechanism includes a third motor, the output end of the third motor is fixedly connected to a threaded rod, a moving block is threadedly connected to the threaded rod, and a brush adapted to the filter mesh plate is installed on the surface of the moving block.

6. The agricultural wastewater hydrogen production device according to claim 1, characterized in that: The lower left side of the pretreatment tank is connected to a second slag discharge pipe, the upper right side of the pretreatment tank is connected to a first exhaust pipe, and a wedge-shaped base is provided at the bottom of the inner cavity of the pretreatment tank, and the wedge-shaped base is connected to the second slag discharge pipe.

7. The agricultural wastewater hydrogen production device according to claim 1, characterized in that: The heating mechanism includes a heating tank, a heating rod is provided on the top of the inner cavity of the heating tank, the output end of the siphon tube is connected to the heating tank, the input end of the siphon tube is connected to the pretreatment tank, and the input end of the siphon tube is connected to a filter head, and the filter head is located in the pretreatment tank; the bottom of the right side of the heating tank is connected to a sewage pipe, and a rotating cover is provided on the right side of the sewage pipe.

8. The agricultural wastewater hydrogen production device according to claim 1, characterized in that: The hydrogen production mechanism comprises a hydrogen production tank, on which a positive electrode and a negative electrode are installed, and a power source is connected to the positive electrode and the negative electrode; the hydrogen production tank is provided with a second exhaust pipe, and the second exhaust pipe is connected to a gas collection tank.

9. A method for producing hydrogen from agricultural wastewater, characterized in that: The method of using the agricultural wastewater hydrogen production device according to any one of claims 1 to 8 comprises: S1. Inject agricultural wastewater into the pretreatment tank through the water injection pipe, and add the agent into the pretreatment tank along the water injection pipe. Under the action of the crushing mechanism, the impurities in the agricultural wastewater are crushed, and then the impurities in the crushed wastewater are filtered. The second motor is turned on to drive the stirring rod to rotate, so that the sewage and the drug are quickly mixed to accelerate flocculation; S2, squeeze the squeezing air bag on the siphon tube, so that the sewage is filtered by the filter head and then injected into the heating box along the siphon tube, and turn on the heating rod to heat the sewage, and the steam enters the condenser along the pipeline for condensation; S3. The condensed water is injected into the hydrogen production tank along the pipeline and electrically connected to the electrodes so that the wastewater is electrolyzed to obtain hydrogen.

10. The method for producing hydrogen from agricultural wastewater according to claim 9, characterized in that: The method also includes starting the third motor to drive the threaded rod to rotate so that the moving block moves on the threaded rod, thereby causing the moving block to drive the brush to move up and down to sweep the debris on the filter screen plate to the first slag discharge pipe to clean the debris on the filter screen plate.

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