Safe discharge device of hydrogen production system

Abstract

The invention discloses a hydrogen production system safety discharge device which comprises a trench and a water-sealed tank fixedly installed at the top end of the trench, an emptying valve is fixedly communicated with the middle of the top end of the water-sealed tank, a water inlet pipe is fixedly communicated with the left side position, close to the bottom end, of the trench, and a throttling valve is installed at the joint of the water inlet pipe and the water-sealed tank. An overflow assembly fixedly communicates with the right side position, close to the bottom end, of the water-sealed tank, and a discharging tank fixedly communicates with the top end of the emptying valve. According to the invention, the discharged hydrogen is utilized, the continuously discharged hydrogen is guided into the pressurizing assembly, so that the pressure is increased, the automatic downward movement of the sealing baffle plate is realized, the whole process is automatically completed, the descending of the overflow position can be quickly realized, and the hydrogen discharge space can be ensured to be satisfied; the problem that hydrogen cannot be discharged due to the fixed overflow position of a traditional device is solved, and the hydrogen discharging efficiency is remarkably improved.

Description

Technical Field

[0001] The invention belongs to the technical field of hydrogen production, and in particular relates to a safe discharge device for a hydrogen production system. Background Art

[0002] A hydrogen production system is a combination of equipment or devices used to produce hydrogen. Its core function is to convert water or other hydrogen-containing substances into hydrogen through a specific chemical reaction or physical process. In the hydrogen discharge system, drainage operations are performed. For traditional hydrogen production equipment, the drainage system has certain safety hazards, because during the drainage process, trace amounts of hydrogen must be discharged along with the water vapor. If discharged into the ditch, trace amounts of hydrogen will rise with the airflow and even enter the room. Once there is a spark or open flame, it will cause a major safety accident. Therefore, a hydrogen production system discharge device is needed.

[0003] The discharge device of the hydrogen production system currently used is mainly composed of a water-sealed tank, that is, the discharge water is passed into the interior of the tank, and the hydrogen is discharged through the discharge port at the top. However, when the discharge volume of this device is too large, the overflow port is set too high, which can easily cause the space inside the tank to become smaller, thereby causing the hydrogen to be unable to be discharged. Improvement is urgently needed.

[0004] At the same time, the current hydrogen production system discharge device mainly discharges hydrogen through the exhaust valve at the top of the tank. However, when the hydrogen emission is too much, the discharged hydrogen will often cause the air around the discharge port or pipeline to liquefy, which is likely to cause dangerous phenomena such as suffocation of people around the discharge pipeline. In addition, hydrogen will diffuse rapidly after entering the air, and condense water vapor in the air to form a hydrogen cloud. If it encounters a collision, static electricity or a weak spark, it may cause deflagration and explosion, causing serious harm to the safety of surrounding personnel, equipment and building facilities, and posing a great safety hazard. Summary of the invention

[0005] The object of the present invention is to provide a safe discharge device for a hydrogen production system to solve the problems raised in the above background technology.

[0006] In order to achieve the above-mentioned purpose, the present invention provides the following technical solutions: a safe discharge device for a hydrogen production system, comprising a trench, a water seal tank is fixedly installed at the top of the trench, a drain valve is fixedly connected to the middle of the top of the water seal tank, a water inlet pipe is fixedly connected to the left position of the trench near the bottom, a throttle valve is installed at the connection between the water inlet pipe and the water seal tank, an overflow assembly is fixedly connected to the right position of the water seal tank near the bottom, a discharge tank is fixedly connected to the top of the drain valve, a three-way valve is fixedly connected to the top of the discharge tank, a hydrogen secondary treatment assembly located behind the discharge tank is fixedly installed at the top of the trench, the top of the three-way valve is connected to the top of the hydrogen secondary treatment assembly, a pressurizing assembly is fixedly installed at the right end of the outer side of the trench, and the top of the pressurizing assembly is connected to the right end of the three-way valve.

[0007] As a further technical solution of the present invention, the input end of the water inlet pipe is connected to the drain pipe of the hydrogen production system, and the middle part of the discharge tank is movably connected with a main shaft.

[0008] As a further technical solution of the present invention, the outer side surface of the main shaft is fixedly sleeved with an impeller located inside the discharge tank, the front side of the main shaft penetrates the front side of the discharge tank and is fixedly installed with an indicator needle, and the rear end of the main shaft is connected to the hydrogen secondary treatment component.

[0009] When discharging the gas, the discharge port of the hydrogen production system can be connected to the water inlet pipe first, and the flow entering the water seal tank can be controlled by controlling the throttle valve. At this time, the discharge water containing hydrogen will enter the water seal tank, and the hydrogen contained in the water flow will rise and be discharged through the drain valve at the top.

[0010] As a further technical solution of the present invention, the overflow assembly includes an overflow tank, which is connected to the right side of the water seal tank near the bottom end. A sealing baffle is movably connected to the right side of the overflow tank, and the sealing baffle moves up and down relative to the overflow tank.

[0011] As a further technical solution of the present invention, the area of ​​the sealing baffle is the same as the area of ​​the cross section of the overflow tank, an overflow port is opened on one side of the overflow tank, and the overflow port is connected to the interior of the overflow tank.

[0012] As the water continues to flow in, the water flow gradually increases, and the water level rises accordingly. When the water level rises to the overflow tank, part of the water will enter the overflow tank, and as the water flow continues to rise, the water level rises to the overflow port and overflows through the overflow port, completing the automatic discharge of the water.

[0013] As a further technical solution of the present invention, the pressurizing assembly includes a fixed pipe, the outer side surface of the fixed pipe is fixedly sleeved with a fixed frame, one end of the fixed frame is connected to the outer side surface of the water seal tank, the top end of the fixed pipe is fixedly connected to an air supply pipe, and the top end of the air supply pipe is connected to the right side of the three-way valve.

[0014] As a further technical solution of the present invention, the fixed tube is movably sleeved with a piston plate, the bottom end of the piston plate is fixedly connected to a piston rod located inside the fixed tube, the bottom end of the piston rod passes through the bottom end of the fixed tube and is connected to the top end of the sealing baffle, the outer side surface of the piston rod is movably sleeved with a limit spring, and the upper and lower ends of the limit spring are respectively connected to the bottom end of the piston plate and the bottom end of the inner cavity of the fixed tube.

[0015] When the internal hydrogen pressure of the water seal tank is too high to be discharged quickly, and the rising water level affects the discharge of hydrogen, the output of hydrogen can enter the interior of the discharge tank and enter the interior of the three-way valve through the discharge tank. At this time, the valve on the right end of the three-way valve can be opened, and the hydrogen will then enter the interior of the fixed pipe through the gas transmission pipe. As the hydrogen is input, continuous pressure will be applied to the piston plate. At this time, the limit spring will be compressed and drive the piston rod to move downward, eventually applying a downward thrust to the sealing baffle. At this time, the sealing baffle moves downward and drives the overflow port to move downward. At this time, the height of the overflow port decreases, and the liquid can be discharged in advance, increasing the discharge space of hydrogen.

[0016] By utilizing the discharged hydrogen and introducing it into the interior of the pressurized component through the continuously discharged hydrogen, the pressure is increased and the sealing baffle is automatically moved downward. The whole process is completed automatically, and the overflow position can be quickly lowered to ensure that the discharge space of hydrogen can be met. This avoids the problem of traditional devices that cannot discharge hydrogen due to the fixed overflow position, and significantly improves the discharge efficiency of hydrogen.

[0017] As a further technical solution of the present invention, the hydrogen secondary treatment component includes a treatment tank, which is connected to the top of the ditch, and the top of the treatment tank is fixedly connected to an air intake pipe, and the top of the air intake pipe is connected to the top of the three-way valve, and the rear side of the treatment tank near the bottom is fixedly connected to an exhaust pipe.

[0018] As a further technical solution of the present invention, an extension shaft is movably installed in the middle of the front end of the processing tank, the front end of the extension shaft is connected to the main shaft, the outer side surface of the extension shaft is fixedly sleeved with a friction wheel located inside the processing tank, and metal plates are installed at both ends of the inner cavity of the processing tank, and the outer side surface of the friction wheel is in contact with the metal plate.

[0019] During the hydrogen emission process, the rising hydrogen will drive the impeller to rotate, and the main shaft will rotate accordingly, driving the indicator needle at the front end to rotate. When the amount of hydrogen is large, the rotation speed of the indicator needle will increase accordingly until the hydrogen emission rate increases. At the same time, when the main shaft rotates, the extension shaft will rotate accordingly, driving the friction wheel to rotate. When the friction wheel rotates, it can continuously apply friction to the metal plate, causing the metal plate to generate sparks and ignite hydrogen, consuming part of the hydrogen and reducing the hydrogen discharged from the exhaust pipe.

[0020] By reusing the flow of hydrogen during discharge, the rapid flow of hydrogen can be used to achieve rapid rotation of the main shaft, and sparks are generated through the action of the hydrogen secondary treatment component to ignite excess hydrogen, thereby consuming the increased hydrogen and reducing the hydrogen discharged from the exhaust pipe. The entire process is completed automatically, which can effectively reduce the hydrogen content discharged into the air and reduce safety hazards.

[0021] The beneficial effects of the present invention are as follows: 1. The present invention utilizes the emission of hydrogen and introduces the continuously emitted hydrogen into the interior of the pressurizing component, thereby increasing the pressure and realizing the automatic downward movement of the sealing baffle. The entire process is completed automatically, and the overflow position can be quickly lowered to ensure that the emission space of hydrogen can be met, thereby avoiding the problem of traditional devices that cannot discharge hydrogen due to the fixed overflow position, and significantly improving the emission efficiency of hydrogen.

[0022] 2. The present invention utilizes the flow of hydrogen during discharge again, realizes rapid rotation of the main shaft through the rapid flow of hydrogen, and generates sparks through the action of the hydrogen secondary treatment component to ignite excess hydrogen, thereby consuming the increased hydrogen and reducing the hydrogen discharged from the exhaust pipe. The whole process is completed automatically, which can effectively reduce the hydrogen content discharged into the air and reduce safety hazards. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a front schematic diagram of the overall structure of the present invention; Figure 2 It is a back schematic diagram of the overall structure of the present invention; Figure 3 It is a cross-sectional schematic diagram of the internal structure of the water seal tank of the present invention; Figure 4 It is a separate schematic diagram of the sealing baffle structure of the present invention; Figure 5 It is a cross-sectional schematic diagram of the overflow tank, the three-way valve and the pressurizing component structure of the present invention; Figure 6 for Figure 5 A magnified schematic diagram of the structure at center A; Figure 7 It is a cross-sectional schematic diagram of the structure of the hydrogen secondary processing component of the present invention.

[0024] In the figure: 1. trench; 2. water seal tank; 3. water inlet pipe; 4. throttle valve; 5. drain valve; 6. overflow assembly; 601. overflow tank; 602. sealing baffle; 603. overflow port; 7. discharge tank; 8. impeller; 9. main shaft; 10. indicator needle; 11. three-way valve; 12. pressurizing assembly; 121. fixed pipe; 122. gas pipe; 123. fixed frame; 124. piston plate; 125. piston rod; 126. limit spring; 13. hydrogen secondary treatment assembly; 131. treatment tank; 132. extension shaft; 133. inlet pipe; 134. exhaust pipe; 135. friction wheel; 136. metal plate. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] like Figures 1 to 7 As shown, in an embodiment of the present invention, a safe discharge device for a hydrogen production system includes a trench 1, a water seal tank 2 is fixedly installed at the top of the trench 1, a drain valve 5 is fixedly connected to the middle of the top of the water seal tank 2, a water inlet pipe 3 is fixedly connected to the left position near the bottom of the trench 1, a throttle valve 4 is installed at the connection between the water inlet pipe 3 and the water seal tank 2, an overflow assembly 6 is fixedly connected to the right position near the bottom of the water seal tank 2, a discharge tank 7 is fixedly connected to the top of the drain valve 5, a three-way valve 11 is fixedly connected to the top of the trench 1, and a hydrogen discharge valve 12 is fixedly installed at the rear of the discharge tank 7. The top of the three-way valve 11 is connected to the top of the hydrogen secondary processing component 13, the right end of the outer side of the ditch 1 is fixedly installed with a pressurizing component 12, the top of the pressurizing component 12 is connected to the right end of the three-way valve 11, the input end of the water inlet pipe 3 is connected to the drain pipe of the hydrogen production system, the middle of the discharge tank 7 is movably connected with the main shaft 9, the outer side of the main shaft 9 is fixedly sleeved with the impeller 8 located inside the discharge tank 7, the front of the main shaft 9 passes through the front of the discharge tank 7 and is fixedly installed with an indicator needle 10, and the rear end of the main shaft 9 is connected to the hydrogen secondary processing component 13.

[0027] When discharging the gas, the discharge port of the hydrogen production system can be first connected to the water inlet pipe 3, and the flow rate entering the water seal tank 2 can be controlled by controlling the throttle valve 4. At this time, the discharge water containing hydrogen will enter the water seal tank 2, and the hydrogen contained in the water flow will rise and be discharged through the drain valve 5 at the top.

[0028] like Figure 2 and Figure 3 as well as Figure 4 As shown, the overflow assembly 6 includes an overflow tank 601, which is connected to the right side of the water seal tank 2 near the bottom end. A sealing baffle 602 is movably connected to the right side of the overflow tank 601. The sealing baffle 602 moves up and down relative to the overflow tank 601. The area of ​​the sealing baffle 602 is the same as the area of ​​the cross section of the overflow tank 601. An overflow port 603 is opened on one side of the overflow tank 601, and the overflow port 603 is connected to the interior of the overflow tank 601.

[0029] As the water continues to flow in, the water flow gradually increases, and the water level rises accordingly. When the water level rises to the overflow tank 601, part of the water will enter the overflow tank 601, and as the water flow continues to rise, the water level rises to the overflow port 603 and overflows through the overflow port 603, completing the automatic discharge of the water.

[0030] like Figure 1 and Figure 2 as well as Figure 5 and Figure 6 As shown, the pressurizing component 12 includes a fixed tube 121, and a fixed frame 123 is fixedly sleeved on the outer side surface of the fixed tube 121, one end of the fixed frame 123 is connected to the outer side surface of the water seal tank 2, and the top of the fixed tube 121 is fixedly connected to the air supply pipe 122, and the top of the air supply pipe 122 is connected to the right side of the three-way valve 11, and the inside of the fixed tube 121 is movably sleeved with a piston plate 124, and the bottom end of the piston plate 124 is fixedly connected to a piston rod 125 located inside the fixed tube 121, and the bottom end of the piston rod 125 passes through the bottom end of the fixed tube 121 and is connected to the top of the sealing baffle 602, and the outer side surface of the piston rod 125 is movably sleeved with a limit spring 126, and the upper and lower ends of the limit spring 126 are respectively connected to the bottom end of the piston plate 124 and the bottom end of the inner cavity of the fixed tube 121.

[0031] Embodiment: When the internal hydrogen pressure of the water seal tank 2 is too high to be discharged quickly, and the rising water level affects the discharge of hydrogen, the output of hydrogen can enter the interior of the discharge tank 7 and enter the interior of the three-way valve 11 through the discharge tank 7. At this time, the valve on the right end of the three-way valve 11 can be opened, and the hydrogen then enters the interior of the fixed pipe 121 through the gas transmission pipe 122. As the hydrogen is input, continuous pressure is applied to the piston plate 124. At this time, the limit spring 126 is compressed and drives the piston rod 125 to move downward, and finally applies a downward thrust to the sealing baffle 602. At this time, the sealing baffle 602 moves downward and drives the overflow port 603 to move downward. At this time, the height of the overflow port decreases, and the liquid can be discharged in advance, increasing the discharge space of the hydrogen.

[0032] By utilizing the emission of hydrogen and introducing the continuously emitted hydrogen into the interior of the pressurizing component 12, the pressure is increased and the sealing baffle 602 is automatically moved downward. The entire process is completed automatically, and the overflow position can be quickly lowered to ensure that the hydrogen emission space can be met, thereby avoiding the problem of traditional devices that cannot discharge hydrogen due to the fixed overflow position, and significantly improving the hydrogen emission efficiency.

[0033] like Figure 1 and Figure 2 as well as Figure 7 As shown, the hydrogen secondary treatment component 13 includes a treatment tank 131, which is connected to the top of the trench 1, and the top of the treatment tank 131 is fixedly connected with an air intake pipe 133, and the top of the air intake pipe 133 is connected to the top of the three-way valve 11. The rear side of the treatment tank 131 near the bottom is fixedly connected with an exhaust pipe 134, and an extension shaft 132 is movably installed in the middle of the front end of the treatment tank 131, and the front end of the extension shaft 132 is connected to the main shaft 9, and the outer side surface of the extension shaft 132 is fixedly sleeved with a friction wheel 135 located inside the treatment tank 131, and metal plates 136 are installed on both ends of the inner cavity of the treatment tank 131, and the outer side surface of the friction wheel 135 is in contact with the metal plate 136.

[0034] Embodiment: During the hydrogen emission process, the rising of hydrogen will drive the impeller 8 to rotate, and the main shaft 9 will rotate accordingly, and drive the indicator needle 10 at the front end to rotate. When the amount of hydrogen is large, the rotation speed of the indicator needle 10 will increase accordingly until the hydrogen emission rate increases. At the same time, when the main shaft 9 rotates, the extension shaft 132 will rotate accordingly, and drive the friction wheel 135 to rotate. When the friction wheel 135 rotates, it can continuously apply friction to the metal plate 136, so that the metal plate 136 generates sparks and ignites hydrogen, consumes part of the hydrogen, and reduces the hydrogen discharged from the exhaust pipe 134.

[0035] By utilizing the flow of hydrogen during discharge again, the rapid flow of hydrogen can be used to achieve rapid rotation of the main shaft 9, and the hydrogen secondary treatment component 13 can generate sparks to ignite excess hydrogen, thereby consuming the increased hydrogen and reducing the hydrogen discharged from the exhaust pipe 134. The entire process is completed automatically, which can effectively reduce the hydrogen content discharged into the air and reduce safety hazards.

[0036] Working principle and usage process: When discharging the gas, the discharge port of the hydrogen production system can be connected to the water inlet pipe 3 first, and the flow rate entering the water seal tank 2 can be controlled by controlling the throttle valve 4. At this time, the discharge water containing hydrogen will enter the water seal tank 2, and the hydrogen contained in the water flow will rise and be discharged through the drain valve 5 at the top; As the water flow continues to flow in, the water flow gradually increases, and the water level rises accordingly. When the water level rises to the overflow tank 601, part of the water flow will enter the overflow tank 601, and as the water flow continues to rise, the water level rises to the overflow port 603, and overflows through the overflow port 603, completing the automatic discharge of the water liquid; When the internal hydrogen pressure of the water seal tank 2 is too high to be discharged quickly, and the rising water level affects the discharge of hydrogen, the output of hydrogen can enter the interior of the discharge tank 7 and enter the interior of the three-way valve 11 through the discharge tank 7. At this time, the valve at the right end of the three-way valve 11 can be opened, and the hydrogen enters the interior of the fixed pipe 121 through the gas transmission pipe 122. With the input of hydrogen, continuous pressure is applied to the piston plate 124. At this time, the limit spring 126 is compressed and drives the piston rod 125 to move downward, and finally exerts a downward thrust on the sealing baffle 602. At this time, the sealing baffle 602 moves downward and drives the overflow port 603 to move downward. At this time, the height of the overflow port decreases, and the liquid can be discharged in advance, increasing the discharge space of hydrogen. During the hydrogen emission process, the rising of hydrogen will drive the impeller 8 to rotate, and the main shaft 9 will rotate accordingly, and drive the indicator needle 10 at the front end to rotate. When the amount of hydrogen is large, the rotation speed of the indicator needle 10 will increase accordingly until the hydrogen emission rate increases. At the same time, when the main shaft 9 rotates, the extension shaft 132 will rotate accordingly, and drive the friction wheel 135 to rotate. When the friction wheel 135 rotates, it can continuously apply friction to the metal plate 136, so that the metal plate 136 generates sparks and ignites hydrogen, consumes part of the hydrogen, and reduces the hydrogen discharged from the exhaust pipe 134.

[0037] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A safe discharge device for a hydrogen production system, comprising a trench (1), characterized in that: A water seal tank (2) is fixedly installed at the top of the trench (1), and a drain valve (5) is fixedly connected to the middle of the top of the water seal tank (2). A water inlet pipe (3) is fixedly connected to the left position of the trench (1) near the bottom, and a throttle valve (4) is installed at the connection between the water inlet pipe (3) and the water seal tank (2). An overflow component (6) is fixedly connected to the right position of the water seal tank (2) near the bottom. The top of the drain valve (5) is fixedly connected to a discharge tank (7), and the top of the discharge tank (7) is fixedly connected to a three-way valve (11). A hydrogen secondary treatment component (13) located behind the discharge tank (7) is fixedly installed at the top of the trench (1), and the top of the three-way valve (11) is connected to the top of the hydrogen secondary treatment component (13). A pressurizing component (12) is fixedly installed at the right end of the outer side surface of the trench (1), and the top of the pressurizing component (12) is connected to the right end of the three-way valve (11).

2. A safe discharge device for a hydrogen production system according to claim 1, characterized in that: The input end of the water inlet pipe (3) is connected to the drain pipe of the hydrogen production system, and the middle part of the discharge tank (7) is movably connected to a main shaft (9).

3. A safe discharge device for a hydrogen production system according to claim 2, characterized in that: An impeller (8) located inside the discharge tank (7) is fixedly sleeved on the outer side surface of the main shaft (9), the front side of the main shaft (9) penetrates the front side of the discharge tank (7) and is fixedly mounted with an indicator needle (10), and the rear end of the main shaft (9) is connected to a hydrogen secondary processing assembly (13).

4. A safe discharge device for a hydrogen production system according to claim 3, characterized in that: The overflow assembly (6) comprises an overflow tank (601), the overflow tank (601) being connected to the right side of the water seal tank (2) near the bottom end, the right side of the overflow tank (601) being movably connected with a sealing baffle (602), the sealing baffle (602) being movable up and down relative to the overflow tank (601).

5. A safe discharge device for a hydrogen production system according to claim 4, characterized in that: The area of ​​the sealing baffle (602) is the same as the area of ​​the cross section of the overflow tank (601); an overflow port (603) is provided on one side of the overflow tank (601); and the overflow port (603) is connected to the interior of the overflow tank (601).

6. A safe discharge device for a hydrogen production system according to claim 5, characterized in that: The pressurizing component (12) comprises a fixed tube (121), the outer side surface of the fixed tube (121) being fixedly sleeved with a fixed frame (123), one end of the fixed frame (123) being connected to the outer side surface of the water seal tank (2), the top end of the fixed tube (121) being fixedly connected to an air supply pipe (122), the top end of the air supply pipe (122) being connected to the right side of the three-way valve (11).

7. A safe discharge device for a hydrogen production system according to claim 6, characterized in that: The fixed tube (121) is internally movably sleeved with a piston plate (124), the bottom end of the piston plate (124) is fixedly connected to a piston rod (125) located inside the fixed tube (121), the bottom end of the piston rod (125) passes through the bottom end of the fixed tube (121) and is connected to the top end of the sealing baffle (602), the outer side surface of the piston rod (125) is movably sleeved with a limit spring (126), the upper and lower ends of the limit spring (126) are respectively connected to the bottom end of the piston plate (124) and the bottom end of the inner cavity of the fixed tube (121).

8. A safe discharge device for a hydrogen production system according to claim 7, characterized in that: The hydrogen secondary treatment component (13) comprises a treatment tank (131), the treatment tank (131) being connected to the top of the trench (1), the top of the treatment tank (131) being fixedly connected to an air intake pipe (133), the top of the air intake pipe (133) being connected to the top of a three-way valve (11), and the rear side of the treatment tank (131) near the bottom being fixedly connected to an exhaust pipe (134).

9. A safe discharge device for a hydrogen production system according to claim 8, characterized in that: An extension shaft (132) is movably mounted in the middle of the front end of the processing tank (131); the front end of the extension shaft (132) is connected to the main shaft (9); the outer side surface of the extension shaft (132) is fixedly sleeved with a friction wheel (135) located inside the processing tank (131); metal plates (136) are mounted on both left and right ends of the inner cavity of the processing tank (131); and the outer side surface of the friction wheel (135) is in contact with the metal plate (136).

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