A two-phase anaerobic wastewater treatment device and its treatment method

Abstract

This invention relates to the field of wastewater treatment technology and discloses a two-phase anaerobic wastewater treatment device and its treatment method, including a base, a first reaction tank fixedly connected to the upper surface of the base, a first reaction tank provided at the bottom of the first reaction tank, a second reaction tank fixedly connected to the upper surface of the base, a second reaction tank provided at the bottom of the second reaction tank, a connecting pipe installed on the side of the first reaction tank, one end of the connecting pipe communicating with the first reaction tank, and a control mechanism provided. When wastewater needs to be transported from the inside of the first reaction tank to the inside of the second reaction tank, as the wastewater undergoes acidification treatment, ammonia gas will enter the moving tank through the first gas pipe and push the moving plate upward, thereby opening the connecting pipe through the limiting plate, so that the treated acidified wastewater can enter the second reaction tank through the connecting pipe for subsequent methanation reaction.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, and more specifically to a two-phase anaerobic wastewater treatment device and its treatment method. Background Technology

[0002] To protect the environment, wastewater needs to be treated after it is generated. A common method for wastewater treatment is to use a two-phase anaerobic wastewater treatment device. A two-phase anaerobic wastewater treatment device is a device for treating wastewater. It mainly consists of an outer shell assembly, a connecting assembly, an inlet assembly, a treatment assembly, and a discharge assembly. Two-phase anaerobic wastewater treatment devices have advantages such as fast treatment speed, good treatment effect, and wide applicability.

[0003] Common two-phase anaerobic wastewater treatment devices generally have the following problems when in use:

[0004] Firstly, in common two-phase anaerobic wastewater treatment devices, the methanation and acidification processes are usually carried out in different containers. After one step of treatment, the wastewater needs to be transported to another container for further treatment. Common two-phase anaerobic wastewater treatment devices cannot distinguish between the treated wastewater, resulting in incomplete treatment of the transported wastewater, which is not conducive to wastewater treatment.

[0005] Secondly, when using common two-phase anaerobic wastewater treatment devices, the wastewater generally needs to be stirred and heated during the treatment process to facilitate faster treatment and increase the treatment speed. The wastewater treatment requires the installation of stirring devices to stir the wastewater. Usually, stirring devices are installed in both containers, and both stirring devices need to be in operation at all times, resulting in a waste of resources.

[0006] In summary, common two-phase anaerobic wastewater treatment devices have several drawbacks during operation. They cannot differentiate between treated wastewater, leading to incomplete treatment of transported wastewater. Furthermore, the two mixing devices need to be continuously operated, resulting in resource waste. Summary of the Invention

[0007] In order to overcome the above-mentioned defects of the prior art, the embodiments of the present invention provide a two-phase anaerobic wastewater treatment device and treatment method to solve the technical problems mentioned in the background art.

[0008] To achieve the above objectives, the present invention provides the following technical solution: a two-phase anaerobic wastewater treatment device and its treatment method, comprising a base, a first reaction tank fixedly connected to the upper surface of the base, a first reaction tank provided at the bottom of the first reaction tank, a second reaction tank fixedly connected to the upper surface of the base, a second reaction tank provided at the bottom of the second reaction tank, a connecting pipe installed on the side of the first reaction tank, one end of the connecting pipe communicating with the first reaction tank, the other end of the connecting pipe passing through the second reaction tank and communicating with the second reaction tank, a control mechanism for controlling wastewater provided on the side of the first reaction tank, an adjustment mechanism for providing power provided on the upper surface of the first reaction tank, and a stirring mechanism for stirring wastewater provided inside the first reaction tank;

[0009] The control mechanism includes a support plate fixedly connected to the side of a first reaction vessel. A first gas pipe is fixedly connected to the side of the first reaction vessel, with one end of the first gas pipe communicating with a first reaction tank. A second gas pipe is fixedly connected to the side of a second reaction vessel, with one end of the second gas pipe communicating with a second reaction tank. A groove is formed on the upper surface of the connecting pipe, and a limiting plate is slidably connected inside the groove. A storage block is fixedly connected to the upper surface of the support plate, and a moving groove is formed on the lower surface of the storage block. The other end of the first gas pipe passes through the storage block and communicates with the moving groove. The other end of the second gas pipe passes through the storage block and communicates with the moving groove. A moving plate is slidably connected inside the moving groove. A spring is installed at the top of the moving groove, and the lower end of the spring is fixedly connected to the upper surface of the moving plate. The moving plate is located between the first gas pipe and the second gas pipe.

[0010] In a preferred embodiment, both the first reaction vessel and the second reaction vessel are cylindrical in shape, and the first reaction vessel has a feed inlet on its side.

[0011] In a preferred embodiment, the first air pipe is connected to the upper half of the first reaction tank, the second air pipe is connected to the upper half of the second reaction tank, and the spring is connected to the sliding end of the sliding rheostat.

[0012] In a preferred embodiment, the adjusting mechanism includes a support platform fixedly connected to the upper surface of the first reaction vessel, a motor mounted on the side of the support platform, a fixed plate fixedly connected to the upper surface of the second reaction vessel, a transmission rod rotatably connected to the side of the fixed plate, a lifting groove formed on the side of the support platform, a lifting plate slidably connected inside the lifting groove, an electric telescopic rod fixedly connected to the upper surface of the first reaction vessel, the upper end of the electric telescopic rod fixedly connected to the lifting plate, a lifting rod rotatably connected to the upper surface of the lifting plate, a sliding groove formed at the lower end of the output shaft of the motor, a sliding rod fixedly connected to the upper end of the lifting rod, the sliding rod located inside the sliding groove, the lower end of the lifting rod penetrating the lifting plate and fixedly connected to a limiting rod, and rotating rods rotatably connected to the tops of both the first and second reaction vessels, the upper ends of the two rotating rods penetrating the first and second reaction vessels respectively, and a limiting groove formed at the upper end of the rotating rod located at the upper end of the first reaction vessel.

[0013] In a preferred embodiment, the transmission rod and the rotating rod located above the second reaction vessel are connected to each other by bevel gears. The side of the lifting rod and the side of the transmission rod located above the first reaction vessel are both fitted with bevel gears. The cross-sections of the sliding rod, sliding groove, limiting rod and limiting groove are all rectangular. The circuit of the electric telescopic rod is connected in series with the sliding rheostat.

[0014] In a preferred embodiment, the stirring mechanism includes a plurality of stirring blades fixedly connected to the outer walls of two rotating rods.

[0015] In a preferred embodiment, a plurality of stirring blades are respectively located on the upper half of the rotating rod of the first reaction tank and the second reaction tank, and a heater is mounted on the surface of the stirring blades.

[0016] The technical effects and advantages of this invention are as follows:

[0017] 1. The present invention, by providing a control mechanism, facilitates the transfer of wastewater and iron powder from the first reaction tank to the second reaction tank. As the wastewater undergoes acidification, ammonia gas enters the moving tank through the first gas pipe and pushes the moving plate upward, thereby opening the connecting pipe with the limiting plate. This allows the treated acidified wastewater to enter the second reaction tank through the connecting pipe for subsequent methanation reaction. The process is fully automatic, eliminating the need for manual wastewater treatment and transport, thus saving manpower.

[0018] 2. This invention, by incorporating an adjustment mechanism, facilitates the movement of the moving plate within the moving trough. During this movement, the moving plate compresses the spring, causing the sliding end of the sliding rheostat to move upwards. This reduces the resistance in the circuit, activating the electric telescopic rod. The electric telescopic rod then drives the lifting rod downwards, rotating the transmission rod and causing the rotating rod and stirring blades inside the second reaction tank to rotate, achieving the purpose of stirring and heating the wastewater. The rotating rod inside the first reaction tank stops rotating, saving resources. Furthermore, after wastewater treatment is complete and all products are removed from the device, the spring allows the limiting plate to return to its original position, facilitating subsequent wastewater treatment.

[0019] 3. By incorporating a stirring mechanism, this invention facilitates the mixing and heating of wastewater within the first and second reaction tanks. This accelerates wastewater treatment speed and efficiency, saving a significant amount of time. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0021] Figure 2 This is a three-dimensional cross-sectional view of the control mechanism structure of the present invention.

[0022] Figure 3 for Figure 2 Enlarged schematic diagram of the structure at point A in the diagram.

[0023] Figure 4 This is a three-dimensional cross-sectional view of the adjustment mechanism structure of the present invention.

[0024] Figure 5 for Figure 1 An exploded view of the confinement groove structure.

[0025] Figure 6 This is a three-dimensional cross-sectional view of the stirring mechanism structure of the present invention.

[0026] The attached figures are labeled as follows: 1. Base; 2. First reaction vessel; 201. First reaction tank; 3. Second reaction vessel; 301. Second reaction tank; 4. Connecting pipe; 5. Control mechanism; 501. Support plate; 502. First gas pipe; 503. Second gas pipe; 504. Limiting plate; 505. Storage block; 506. Moving groove; 507. Moving plate; 508. Spring; 6. Adjusting mechanism; 601. Support platform; 602. Motor; 603. Fixed plate; 604. Transmission rod; 605. Lifting groove; 606. Electric telescopic rod; 607. Lifting plate; 608. Lifting rod; 609. Sliding groove; 610. Sliding rod; 611. Limiting rod; 612. Limiting groove; 613. Rotating rod; 7. Stirring mechanism; 701. Stirring blade. Detailed Implementation

[0027] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. In addition, the forms of the various structures described in the following embodiments are merely illustrative. The two-phase anaerobic wastewater treatment device and treatment method involved in the present invention are not limited to the structures described in the following embodiments. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] Reference Figure 1 This invention provides a two-phase anaerobic wastewater treatment device and its treatment method, including a base 1, a first reaction tank 2 fixedly connected to the upper surface of the base 1, a first reaction tank 201 provided at the bottom of the first reaction tank 2, a second reaction tank 3 fixedly connected to the upper surface of the base 1, a second reaction tank 301 provided at the bottom of the second reaction tank 3, a connecting pipe 4 installed on the side of the first reaction tank 2, one end of the connecting pipe 4 communicating with the first reaction tank 201, and the other end of the connecting pipe 4 passing through the second reaction tank 3 and communicating with the second reaction tank 301, a control mechanism 5 for controlling wastewater provided on the side of the first reaction tank 2, an adjustment mechanism 6 for providing power provided on the upper surface of the first reaction tank 2, and a stirring mechanism 7 for stirring wastewater provided inside the first reaction tank 201.

[0029] It is worth noting in this embodiment that by setting up a control mechanism 5, an adjustment mechanism 6, and a stirring mechanism 7, the gas generated during the sewage treatment process can be used to push the moving plate 507 to move inside the moving tank 506, and the limiting plate 504 can be used to open the connecting pipe 4. This allows the sewage to automatically enter the second reaction tank 301 after being treated in the first reaction tank 201, which is fully automatic. Moreover, during the sewage treatment process, the rotating rod 613 and the stirring blade 701 inside the first reaction tank 201 and the second reaction tank 301 will rotate at different times, saving resources and stirring and heating the sewage, which facilitates sewage treatment.

[0030] Reference Figure 2-3 The control mechanism 5 includes a support plate 501 fixedly connected to the side of the first reaction vessel 2. A first gas pipe 502 is fixedly connected to the side of the first reaction vessel 2, and one end of the first gas pipe 502 is connected to the first reaction tank 201. A second gas pipe 503 is fixedly connected to the side of the second reaction vessel 3, and one end of the second gas pipe 503 is connected to the second reaction tank 301. A groove is formed on the upper surface of the connecting pipe 4, and a limiting plate 504 is slidably connected inside the groove. A storage block 5 is fixedly connected to the upper surface of the support plate 501. 05. A moving groove 506 is provided on the lower surface of the storage block 505. The other end of the first air pipe 502 passes through the storage block 505 and is connected to the moving groove 506. The other end of the second air pipe 503 passes through the storage block 505 and is connected to the moving groove 506. A moving plate 507 is slidably connected inside the moving groove 506. A spring 508 is installed on the top of the moving groove 506. The lower end of the spring 508 is fixedly connected to the upper surface of the moving plate 507. The moving plate 507 is located between the first air pipe 502 and the second air pipe 503.

[0031] In this embodiment, it is particularly important to note that after starting the motor 602, since the cross-sections of the sliding rod 610 and the sliding groove 609 are both rectangular and the sliding rod 610 is located inside the sliding groove 609, the motor 602 can drive the lifting rod 608 to rotate. At this time, the limiting rod 611 is located inside the limiting groove 612, and the side of the lifting rod 608 is separated from the two bevel gears sleeved on the side of the first reaction tank 2. The lifting rod 608 can drive the rotating rod 613 above the first reaction tank 201 to rotate, and the rotating rod 613 can drive the stirring blade 701 to rotate. The stirring blade 701 stirs and heats the sewage, and the sewage undergoes acidification treatment inside the first reaction tank 2. The acidification treatment of the sewage inside the first reaction tank 2 will produce ammonia gas. The ammonia gas will enter the moving groove 506 through the first gas pipe 502. As the ammonia gas is continuously produced, the ammonia gas will push the moving plate 507 and the limiting plate 504 to move upward. The spring 508 is in a continuously compressed state, realizing the opening of the connecting pipe 4. The sewage can enter the second reaction tank 3 through the connecting pipe 4.

[0032] Reference Figure 1 Both the first reaction vessel 2 and the second reaction vessel 3 are cylindrical in shape, and the first reaction vessel 2 has a feed inlet on its side.

[0033] It should be noted in this embodiment that the wastewater to be treated is injected into the first reaction tank 201 through the feed port on the side of the first reaction tank 2.

[0034] Reference Figure 3 The first air pipe 502 is connected to the upper half of the first reaction tank 201, the second air pipe 503 is connected to the upper half of the second reaction tank 301, and the spring 508 is connected to the sliding end of the sliding rheostat.

[0035] It should be noted in this embodiment that as the spring 508 is continuously compressed, the sliding end of the sliding rheostat moves upward continuously, and the resistance in the circuit of the electric telescopic rod 606 decreases. When the sewage treatment is completed, the spring 508 can push the limiting plate 504 to move and return to its original position, thus achieving the purpose of resetting.

[0036] Reference Figure 4-5 The adjusting mechanism 6 includes a support platform 601 fixedly connected to the upper surface of the first reaction vessel 2, a motor 602 mounted on the side of the support platform 601, a fixing plate 603 fixedly connected to the upper surface of the second reaction vessel 3, a transmission rod 604 rotatably connected to the side of the fixing plate 603, a lifting groove 605 formed on the side of the support platform 601, a lifting plate 607 slidably connected inside the lifting groove 605, an electric telescopic rod 606 fixedly connected to the upper surface of the first reaction vessel 2, the upper end of the electric telescopic rod 606 fixedly connected to the lifting plate 607, and the upper surface of the lifting plate 607... A lifting rod 608 is rotatably connected to the upper part of the motor 602. A sliding groove 609 is provided at the lower end of the output shaft of the motor 602. A sliding rod 610 is fixedly connected to the upper end of the lifting rod 608. The sliding rod 610 is located inside the sliding groove 609. The lower end of the lifting rod 608 passes through the lifting plate 607 and is fixedly connected to a limiting rod 611. Rotating rods 613 are rotatably connected to the top of the first reaction tank 201 and the second reaction tank 301. The upper ends of the two rotating rods 613 pass through the first reaction tank 2 and the second reaction tank 3 respectively. A limiting groove 612 is provided at the upper end of the rotating rod 613 located at the upper end of the first reaction tank 2.

[0037] In this embodiment, it is particularly important to note that after the wastewater enters the second reaction tank 301 through the connecting pipe 4, the spring 508 reaches its maximum compression value. Since the spring 508 is connected to the sliding end of the sliding rheostat, as the spring 508 is continuously compressed, the sliding end of the sliding rheostat moves upward continuously. The resistance in the circuit of the electric telescopic rod 606 decreases, and the electric telescopic rod 606 starts to operate. The electric telescopic rod 606 drives the lifting plate 607 to move upward inside the lifting groove 605, so that the side of the lifting rod 608 meshes with the two bevel gears sleeved on the side of the first reaction tank 2. The limiting rod 611 moves out of the limiting groove 612, and the lifting rod 608 can drive the transmission rod 604 to rotate. The transmission rod 604 can drive the rotating rod 613 above the second reaction tank 301 to rotate, and stir and heat the wastewater inside the second reaction tank 301, so that the temperature inside the second reaction tank 301 is 33 degrees, and the wastewater undergoes methanation treatment inside the second reaction tank 301.

[0038] Reference Figure 5 The transmission rod 604 is connected to the rotating rod 613 located above the second reaction tank 3 by bevel gears. The side of the lifting rod 608 and the side of the transmission rod 604 located above the first reaction tank 2 are both fitted with bevel gears. The cross-sections of the sliding rod 610, sliding groove 609, limiting rod 611 and limiting groove 612 are all rectangular. The circuit of the electric telescopic rod 606 is connected in series with the sliding rheostat.

[0039] It should be noted in this embodiment that when the side of the lifting rod 608 separates from the two bevel gears sleeved on the side of the first reaction tank 2, the lifting rod 608 can drive the rotating rod 613 above the first reaction tank 201 to rotate. When the side of the lifting rod 608 meshes with the two bevel gears sleeved on the side of the first reaction tank 2, the limiting rod 611 moves out of the limiting groove 612, and the lifting rod 608 can drive the transmission rod 604 to rotate. The transmission rod 604 can drive the rotating rod 613 above the second reaction tank 301 to rotate.

[0040] Reference Figure 6 The stirring mechanism 7 includes multiple stirring blades 701 fixedly connected to the outer walls of two rotating rods 613.

[0041] It should be noted in this embodiment that when the sewage enters the first reaction tank 201 and the second reaction tank 301, the rotating rod 613 inside the first reaction tank 201 and the second reaction tank 301 will rotate to stir and heat the sewage, thereby accelerating the sewage treatment speed and efficiency.

[0042] Reference Figure 6 Multiple stirring blades 701 are located on the upper half of the rotating rod 613 of the first reaction tank 201 and the second reaction tank 301, respectively, and heaters are installed on the surface of the stirring blades 701.

[0043] It should be noted in this embodiment that the rotation of the rotating rod 613 achieves stirring and heating of the sewage, thereby accelerating the sewage treatment speed and efficiency.

[0044] In conclusion, the above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A two-phase anaerobic wastewater treatment device, comprising a base (1), characterized in that: A first reaction tank (2) is fixedly connected to the upper surface of the base (1). A first reaction tank (201) is provided at the bottom of the first reaction tank (2). A second reaction tank (3) is fixedly connected to the upper surface of the base (1). A second reaction tank (301) is provided at the bottom of the second reaction tank (3). A connecting pipe (4) is installed on the side of the first reaction tank (2). One end of the connecting pipe (4) is connected to the first reaction tank (201). The other end of the connecting pipe (4) passes through the second reaction tank (3) and is connected to the second reaction tank (301). A control mechanism (5) for controlling sewage is provided on the side of the first reaction tank (2). An adjustment mechanism (6) for providing power is provided on the upper surface of the first reaction tank (2). A stirring mechanism (7) for stirring sewage is provided inside the first reaction tank (201). The control mechanism (5) includes a support plate (501) fixedly connected to the side of the first reaction vessel (2), a first gas pipe (502) fixedly connected to the side of the first reaction vessel (2), one end of the first gas pipe (502) communicating with the first reaction tank (201), a second gas pipe (503) fixedly connected to the side of the second reaction vessel (3), one end of the second gas pipe (503) communicating with the second reaction tank (301), a groove is provided on the upper surface of the connecting pipe (4), a limiting plate (504) is slidably connected inside the groove, and a storage block (505) is fixedly connected to the upper surface of the support plate (501). The storage block (505) has a moving groove (506) on its lower surface. The other end of the first air pipe (502) passes through the storage block (505) and is connected to the moving groove (506). The other end of the second air pipe (503) passes through the storage block (505) and is connected to the moving groove (506). A moving plate (507) is slidably connected inside the moving groove (506). A spring (508) is installed on the top of the moving groove (506). The lower end of the spring (508) is fixedly connected to the upper surface of the moving plate (507). The moving plate (507) is located between the first air pipe (502) and the second air pipe (503). The adjusting mechanism (6) includes a support platform (601) fixedly connected to the upper surface of the first reaction vessel (2), a motor (602) mounted on the side of the support platform (601), a fixing plate (603) fixedly connected to the upper surface of the second reaction vessel (3), a transmission rod (604) rotatably connected to the side of the fixing plate (603), a lifting groove (605) opened on the side of the support platform (601), a lifting plate (607) slidably connected inside the lifting groove (605), an electric telescopic rod (606) fixedly connected to the upper surface of the first reaction vessel (2), the upper end of the electric telescopic rod (606) fixedly connected to the lifting plate (607), and the upper end of the lifting plate (607) being fixedly connected to the lifting plate (607). A lifting rod (608) is rotatably connected to the surface. A sliding groove (609) is provided at the lower end of the output shaft of the motor (602). A sliding rod (610) is fixedly connected to the upper end of the lifting rod (608). The sliding rod (610) is located inside the sliding groove (609). The lower end of the lifting rod (608) passes through the lifting plate (607) and is fixedly connected to a limiting rod (611). Rotating rods (613) are rotatably connected to the top of the first reaction tank (201) and the second reaction tank (301). The upper ends of the two rotating rods (613) pass through the first reaction tank (2) and the second reaction tank (3) respectively. A limiting groove (612) is provided at the upper end of the rotating rod (613) located at the upper end of the first reaction tank (2). The transmission rod (604) is connected to the rotating rod (613) located above the second reaction tank (3) by bevel gears. The side of the lifting rod (608) and the side of the transmission rod (604) located above the first reaction tank (2) are both fitted with bevel gears. The cross-sections of the sliding rod (610), sliding groove (609), limiting rod (611) and limiting groove (612) are all rectangular. The circuit of the electric telescopic rod (606) is connected in series with the sliding rheostat.

2. The dual-phase anaerobic wastewater treatment device according to claim 1, characterized in that: Both the first reaction vessel (2) and the second reaction vessel (3) are cylindrical in shape, and the first reaction vessel (2) has a feed inlet on its side.

3. The dual-phase anaerobic wastewater treatment device according to claim 1, characterized in that: The first air pipe (502) is connected to the upper half of the first reaction tank (201), the second air pipe (503) is connected to the upper half of the second reaction tank (301), and the spring (508) is connected to the sliding end of the sliding rheostat.

4. The two-phase anaerobic wastewater treatment device according to claim 1, characterized in that: The stirring mechanism (7) includes a plurality of stirring blades (701) fixedly connected to the outer walls of the two rotating rods (613).

5. The dual-phase anaerobic wastewater treatment device according to claim 4, characterized in that: Multiple stirring blades (701) are located on the upper half of the rotating rod (613) of the first reaction tank (201) and the second reaction tank (301), respectively, and heaters are installed on the surface of the stirring blades (701).

6. A method for treating wastewater using a two-phase anaerobic wastewater treatment device, comprising the two-phase anaerobic wastewater treatment device according to any one of claims 1-5, characterized in that: Includes the following steps: S1: First, the wastewater and iron powder to be treated are injected into the first reaction tank (201) through the feed port on the side of the first reaction tank (2); S2: Start the motor (602). Since the cross-sections of the sliding rod (610) and the sliding groove (609) are both rectangular and the sliding rod (610) is located inside the sliding groove (609), the motor (602) can drive the lifting rod (608) to rotate. At this time, the limiting rod (611) is located inside the limiting groove (612). The side of the lifting rod (608) is separated from the two bevel gears sleeved on the side of the first reaction tank (2). The lifting rod (608) can drive the rotating rod (613) above the first reaction tank (2) to rotate. The rotating rod (613) can drive the stirring blade (701) to rotate. The stirring blade (701) stirs and heats the sewage. The sewage is acidified inside the first reaction tank (2). S3: Inside the first reaction tank (2), the sewage is mainly decomposed into small molecules and easily soluble organic matter by some facultative anaerobic bacteria, such as Clostridium, Peptococcus, and Escherichia coli. Then, it penetrates into the cells and decomposes into volatile organic acids, alcohols, aldehydes, such as formic acid, acetic acid, and lower alcohols. The ammonia gas produced by the decomposition of nitrogen-containing organic matter will enter the moving tank (506) through the first gas pipe (502). As ammonia gas is continuously generated, it will push the moving plate (507) and the limiting plate (504) to move upward. The spring (508) is in a state of continuous compression, which realizes the opening of the connecting pipe (4). The sewage enters the second reaction tank (3) through the connecting pipe (4). S4: After the sewage enters the second reaction tank (3) through the connecting pipe (4), the compression value of the spring (508) reaches its maximum. Since the spring (508) is connected to the sliding end of the sliding rheostat, as the spring (508) is continuously compressed, the sliding end of the sliding rheostat moves upward continuously. The resistance in the circuit of the electric telescopic rod (606) decreases, and the electric telescopic rod (606) starts to operate. The electric telescopic rod drives the lifting plate (607) to move upward inside the lifting groove (605), so that the side of the lifting rod (608) meshes with the two bevel gears sleeved on the side of the first reaction tank (2). The limiting rod (611) moves out of the limiting groove (612). The lifting rod (608) can drive the transmission rod (604) to rotate. The transmission rod (604) can drive the rotating rod (613) above the second reaction tank (3) to rotate, and stir and heat the sewage inside the second reaction tank (301), so that the sewage undergoes methanation treatment inside the second reaction tank (301).

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