A sludge reduction device with a special structure to strengthen the stable attachment of worms

Abstract

The present invention discloses a sludge reduction device with a special structure to strengthen the stable attachment of worms. The device comprises a housing, a worm packing box, a porous conveyor belt, a mud inlet assembly, a water inlet assembly, an aeration assembly, and a drainage assembly. The worm packing box is connected to a fixed plate by a connecting rod. The fixed plate is provided with a mounting rod, which is connected to the housing. Rollers are provided on all four sides of the fixed plate. Rollers are fixedly sleeved on the four rollers. The four rollers are connected by a linkage belt transmission. The porous conveyor belt is provided with a plurality of slots, and a plurality of holes are evenly provided in the slots. The porous conveyor belt is tensioned and mounted on the rollers. A drive assembly is connected to the rollers. The mud inlet assembly and the water inlet assembly are both arranged above the porous conveyor belt. The aeration assembly and the drainage assembly are both installed in the housing. The present invention realizes efficient utilization and long-term stable operation of the worms, improves the dispersibility and attachment density of the worms, and realizes efficient and stable treatment of sewage sludge.

Description

Technical Field

[0001] The invention belongs to the technical field of sludge treatment, and in particular relates to sludge reduction equipment with a special structure for strengthening the stable attachment of worms. Background Art

[0002] The wastewater treatment process inevitably produces large amounts of sludge. Untreated sludge contains significant amounts of water, pollutants, and hazardous substances. Simply piling, landfilling, or improperly incinerating the sludge can pose a serious threat to soil structure, water quality, and air quality. Therefore, finding efficient and environmentally friendly wastewater treatment strategies to reduce harmful components in sludge, alleviate the pressure caused by sludge accumulation, and mitigate potential environmental risks is crucial to maintaining the long-term stable operation of wastewater treatment systems. Among these, achieving resource utilization and reducing sludge volume are key challenges that require urgent attention.

[0003] Utilizing the predatory action of micro-animals to reduce sludge is considered a highly promising ecological reduction technology due to its advantages of low energy consumption, low cost, and no secondary pollution. Worms, in particular, are highly adaptable to the environment, can survive in lower temperature ranges and a variety of substrate environments, are easy to control in number, and are abundant in nature. As facultative aerobic organisms, worms perform well in sludge reduction and have the ability to attach and grow. Therefore, in the simultaneous treatment process of sewage and sludge, the artificial introduction of attached oligochaete worms, the addition of filler carriers for the worms to attach to, and the ensuring of the stability of their growth environment have become effective ways to achieve sludge reduction.

[0004] However, current equipment used in the simultaneous treatment of sewage sludge generally faces issues such as worm loss, uneven distribution, and unstable attachment. Therefore, it is necessary to develop a sludge reduction device with a special structure that strengthens the stable attachment of worms. This can reduce the worm loss rate during long-term sewage sludge treatment, improve worm dispersion and attachment density, and achieve efficient and stable sewage sludge treatment. Summary of the Invention

[0005] In order to solve the technical problems existing in the above-mentioned prior art, the present invention proposes a sludge reduction device with a special structure to strengthen the stable attachment of worms.

[0006] The technical solution adopted in the present invention is as follows:

[0007] A sludge reduction device with a special structure to enhance the stable attachment of worms, comprising a box body, a worm stuffing box, a porous conveyor belt, a mud inlet assembly, a water inlet assembly, an aeration assembly and a drainage assembly. Both sides of the worm stuffing box are connected to fixed plates by connecting rods, and both fixed plates are provided with mounting rods and are connected to the box body on the adjacent side. Rollers are provided on all four sides of the fixed plate on the outside of the worm stuffing box, and rollers are fixedly sleeved on the four rollers. The four rollers are connected by a linkage belt transmission. The porous conveyor belt is provided with a plurality of hole slots inclined along the running direction of the porous conveyor belt, and a plurality of holes are evenly provided in the hole slots. The porous conveyor belt is tensioned and installed on the rollers. The rollers are transmission-connected with a drive assembly. The mud inlet assembly and the water inlet assembly are arranged above the porous conveyor belt, and the aeration assembly and the drainage assembly are both installed in the box body.

[0008] In a further technical solution, the top surface of the box body is open and inward-inclined baffles are symmetrically arranged on both sides of the opening, and mounting grooves are provided on both baffles. The two mounting rods are arranged in the mounting grooves on the adjacent side, and a gap is left between the fixed plate and the two baffles.

[0009] In a further technical solution, the drive assembly includes a servo motor, a coupling and a base, the base is connected below the mounting rod, the servo motor is mounted on the base, and is connected to the adjacent roller shaft through the coupling.

[0010] In a further technical solution, the roller includes a driving wheel and a linkage wheel, and the driving wheel and the linkage wheel are fixedly mounted on the roller shaft, the porous conveyor belt is tensioned on the driving wheel, and the linkage belt is tensioned on the linkage wheel.

[0011] In a further technical solution, the mud inlet assembly includes a mud inlet pump and a mud inlet pipe. One end of the mud inlet pipe is connected to the mud inlet pump, and the other end extends into the box body and is arranged on one side of the porous conveyor belt. Multiple mud outlets are evenly arranged below the mud inlet pipe.

[0012] In a further technical solution, the water inlet assembly includes a water inlet pump and a water inlet pipe, one end of the water inlet pipe is connected to the water inlet pump, and the other end extends into the box and is arranged on one side of the porous conveyor belt.

[0013] In a further technical solution, one end of the water inlet pipe extending into the box body is connected to a movable flushing pipe.

[0014] In a further technical solution, the aeration assembly includes a blower, an aeration pipe and a gas flow meter. One end of the aeration pipe is connected to the blower, and the other end passes through the box and extends into the inner bottom of the box. A plurality of aeration holes are evenly distributed on the aeration pipe inside the box, and the gas flow meter is installed on the aeration pipe outside the box.

[0015] In a further technical solution, the aeration tube is a variable micropore aeration tube, and the aperture of the aeration hole varies in the range of 0.5 to 1.0 mm. Air is supplied to the sludge mixture by a mixture of continuous micro-aeration and intermittent strong disturbance aeration to maintain the dissolved oxygen concentration in the box stable in the range of 1±0.5 mg / L.

[0016] In a further technical solution, the drainage assembly includes an outlet pipe, an outlet pump and a slide rail. One end of the outlet pipe is connected to the outlet pump, and the other end passes through the side of the box and extends into the box. The slide rail is U-shaped. The slide rail is installed on a porous conveyor belt and is slidably connected to the porous conveyor belt. The outlet pipe passes through the slide rail and abuts the surface of the porous conveyor belt.

[0017] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0018] 1. The present invention realizes the efficient utilization and long-term stable operation of attached worms, improves the dispersibility and attachment density of worms, thereby realizing the efficient and stable treatment of sewage sludge, and effectively promoting the development of efficient ecological reduction of sludge.

[0019] 2. With the continuous operation of the porous conveyor belt, the present invention can repeatedly take out the worms in the worm stuffing box, so that the distribution of the worms on the porous conveyor belt becomes more uniform, effectively avoiding the situation of local overcrowding or sparseness, thereby improving the growth and reproduction efficiency of the worms.

[0020] 3. The present invention effectively prevents the problems of worm slippage and uneven distribution, thereby reducing the problem of worm loss in traditional equipment, and also makes the porous conveyor belt have excellent water permeability and cleanability, which not only improves the worm recovery efficiency and accuracy, but also maintains the integrity and activity of the worms, providing high-quality worm resources for sludge reduction treatment, thereby realizing long-term, efficient and stable operation of the equipment.

[0021] 4. The present invention supplies gas to the sewage-sludge mixture by a combination of continuous micro-aeration and intermittent strong disturbance aeration through variable microporous aeration tubes, thereby being able to precisely control the gas supply to the sewage-sludge mixture and ensure a stable dissolved oxygen concentration in the reactor, thereby meeting the oxygen conditions required for worm growth, promoting their healthy growth and active metabolism, and accelerating the decomposition and mineralization of organic matter in the sludge, thereby significantly improving the efficiency and quality of sludge reduction treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention will now be described by way of example with reference to the accompanying drawings, in which:

[0023] Figure 1 It is a structural schematic diagram of the present invention;

[0024] Figure 2 It is a schematic diagram of the side structure of the interior of the box body of the present invention;

[0025] Figure 3 It is a schematic diagram of the top view of the structure of the present invention;

[0026] Figure 4 Schematic diagram of the partial structure of the inner side of the porous conveyor belt of the present invention;

[0027] Figure 5 Schematic diagram of the cooperation between the porous conveyor belt and the slide rail of the present invention;

[0028] Figure 6 for Figure 5 Schematic diagram of the section along the direction of the cutting symbol AA.

[0029] Figure markings: 1-box, 2-worm stuffing box, 3-porous conveyor belt, 4-connecting rod, 5-fixed plate, 6-mounting rod, 7-roller, 8-roller, 801-driving wheel, 802-linking wheel, 9-linking belt, 10-hole groove, 11-hole, 12-baffle, 13-mounting groove, 14-servo motor, 15-coupling, 16-base, 17-mud inlet pump, 18-mud inlet pipe, 19-water inlet pump, 20-water inlet pipe, 21-mobile flushing pipe, 22-blower, 23-variable microporous aeration tube, 24-gas flow meter, 25-aeration hole, 26-water outlet pipe, 27-water outlet pump, 28-slide rail. DETAILED DESCRIPTION

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0031] See Figures 1-6In order to solve the problems of easy loss, uneven distribution and unstable attachment of worms in existing sludge treatment equipment, the present invention provides a sludge reduction equipment with a special structure to strengthen the stable attachment of worms, including a box body 1, a worm filling box 2, a porous conveyor belt 3, a sludge inlet component, a water inlet component, an aeration component and a drainage component. Both sides of the worm filling box 2 are connected to a fixing plate 5 through a connecting rod 4. The two fixing plates 5 are provided with a mounting rod 6 and are connected to the box body 1 on the adjacent side. The four sides of the fixing plate 5 are on the outside of the worm filling box 2. A roller shaft 7 is provided through each of the four roller shafts 7, and a roller 8 is fixedly sleeved on each of the four roller shafts 7. The four roller wheels 8 are connected by a linkage belt 9. The porous conveyor belt 3 is provided with a plurality of hole grooves 10 inclined along the running direction of the porous conveyor belt 3, and a plurality of holes 11 are evenly provided in the hole grooves 10. The porous conveyor belt 3 is tensioned and installed on the roller 8. The roller shaft 7 is connected to the drive assembly. The mud inlet assembly and the water inlet assembly are arranged above the porous conveyor belt 3, and the aeration assembly and the drainage assembly are installed in the box body 1.

[0032] This sludge reduction equipment achieves efficient utilization and long-term stable operation of attached worms, improves the dispersion and attachment density of worms, thereby achieving efficient and stable treatment of sewage sludge, and effectively promoting the development of efficient ecological sludge reduction. Its specific working principle is as follows:

[0033] First, the drive assembly is activated, transmitting power to roller shaft 7, driving rollers 8 on roller shaft 7 to rotate. The four rollers 8 rotate synchronously via interlocking belt 9, thereby driving the porous conveyor belt 3 to operate continuously and stably. Next, the sludge and water inlet assemblies are activated, drawing in sewage sludge and clean water, respectively. After these materials fall onto the porous conveyor belt 3, they splash to the sides or follow the porous conveyor belt 3 before entering the housing 1. Some of the material also passes through holes 11 on the surface of the porous conveyor belt 3 and falls into the worm-filling box 2 below. As the material flows through the worm-filling box 2, the worm-rich mixture is carried out and falls onto the porous conveyor belt 3, following its movement. Simultaneously, the aeration assembly is activated, supplying air to the sewage-sludge mixture to maintain the dissolved oxygen concentration in the mixture, providing the necessary oxygen for subsequent worm growth and sludge reduction. When the level of the sewage-sludge mixture in the box 1 is higher than the lower end of the porous conveyor belt 3, the sewage-sludge mixture follows the porous conveyor belt 3 because the slots 10 are arranged obliquely along the running direction of the porous conveyor belt 3. When it reaches the upper end, it falls back into the worm stuffing box 2, thereby carrying out worms from the worm stuffing box 2 again. The worm mixture then falls back into the porous conveyor belt 3. As the porous conveyor belt 3 continues to run, this process is repeated, making the distribution of worms on the porous conveyor belt 3 more uniform, effectively avoiding local overcrowding or sparseness, and thus improving the growth and reproduction efficiency of the worms. At the same time, by optimizing the pore size and pore density of the holes 11 in the slots 10, it is possible to ensure that the worms are firmly attached to the surface of the porous conveyor belt 3, effectively preventing the worms from slipping and unevenly distributed, thereby reducing the problem of worm loss in traditional equipment, and also making the porous conveyor belt 3 have excellent water permeability and cleanability, which not only improves the worm recovery efficiency and accuracy, but also maintains the integrity and activity of the worms, providing high-quality worm resources for sludge reduction treatment, thereby achieving long-term, efficient and stable operation of the equipment. After worm degradation and treatment, the harmful substances in the sewage sludge mixture are significantly reduced. At this time, the drainage component is started to discharge the purified clean water out of the box 1, effectively avoiding the accumulation of stagnant water and pollutants, and further improving the overall processing efficiency and stability of the equipment.

[0034] In a specific embodiment, see Figure 2 The top surface of the box body 1 is open and inwardly inclined baffles 12 are symmetrically arranged on both sides of the opening. Mounting grooves 13 are provided on the two baffles 12. The two mounting rods 6 are placed in the mounting grooves 13 on the adjacent side, and there is a gap between the fixing plate 5 and the two baffles 12.

[0035] A gap is left between the two inward-inclined baffles 12 and the fixed plate 5. After sewage sludge and clean water fall onto the porous conveyor belt 3 and splash to the sides, these materials can be redirected into the box body 1. The mounting rods 6 on the fixed plate 5 are placed in the mounting grooves 13 on the baffles 12, making the fixed plate 5 easy to install on the box body 1 and easy to remove, greatly simplifying the maintenance and replacement process of the equipment.

[0036] In a specific embodiment, see Figure 2 The driving assembly includes a servo motor 14, a coupling 15 and a base 16. The base 16 is connected to the bottom of the mounting rod 6. The servo motor 14 is installed on the base 16 and is connected to the adjacent roller shaft 7 through the coupling 15.

[0037] The servo motor 14 is connected to the underside of the mounting rod 6 via a base 16 and is in transmission connection with the adjacent roller shaft 7 via a coupling 15. This eliminates the need to modify the existing structure, such as the housing 1 and the inclined plate, thereby effectively avoiding potential structural damage and additional manufacturing costs. It is a relatively simple method of driving the porous conveyor belt 3. It also prevents sewage sludge and clean water from coming into contact with the drive components, extending their service life and reducing the risk of failure due to corrosion or contamination.

[0038] In a specific embodiment, see Figure 1 and Figure 2 The roller 8 includes a driving wheel 801 and a linkage wheel 802. The driving wheel 801 and the linkage wheel 802 are fixedly mounted on the roller shaft 7. The porous conveyor belt 3 is tensioned on the driving wheel 801, and the linkage belt 9 is tensioned on the linkage wheel 802.

[0039] The roller 8 achieves synchronous operation of the four interlocking wheels 802 through the coordinated cooperation of the driving wheel 801 and the interlocking wheel 802 by tensioning the interlocking belt 9 and installing it on the interlocking wheel 802, thereby enabling the driving wheel 801 to stably drive the porous conveyor belt 3 to move.

[0040] In a specific embodiment, see Figure 1 The mud inlet assembly includes a mud inlet pump 17 and a mud inlet pipe 18. One end of the mud inlet pipe 18 is connected to the mud inlet pump 17, and the other end extends into the box body 1 and is arranged above the porous conveyor belt 3. A plurality of mud outlets are evenly opened below the mud inlet pipe 18.

[0041] After the mud pump 17 is started, the sewage sludge is efficiently sucked in and pumped into the mud inlet pipe 18. The mud inlet pipe 18 conveys the sewage sludge to the top of the porous conveyor belt 3 through the mud outlets evenly distributed below, thereby avoiding local accumulation of sewage sludge.

[0042] In a specific embodiment, see Figure 1 The water inlet assembly includes a water inlet pump 19 and a water inlet pipe 20. One end of the water inlet pipe 20 is connected to the water inlet pump 19, and the other end extends into the box body 1 and is arranged above the mud inlet pipe 18.

[0043] After the water inlet pump 19 is started, clean water is efficiently sucked in and pumped to the water inlet pipe 20, and the sewage sludge below is flushed, so that the sewage sludge will not remain on the porous conveyor belt 3, which can ensure that the sludge can be evenly distributed in the treatment area and improve the treatment effect.

[0044] In a specific embodiment, see Figure 1 One end of the water inlet pipe 20 extending into the box body 1 is connected to a movable flushing pipe 21.

[0045] By connecting the movable flushing pipe 21 at one end of the water inlet pipe 20, the movable flushing pipe 21 can move freely above the porous conveyor belt 3, which can not only flush the sewage sludge at different positions above the porous conveyor belt 3, but also flush the sewage sludge splashed onto the inclined plates on both sides, thereby enhancing the adaptability and practicality of the equipment.

[0046] In a specific embodiment, see Figure 1 The aeration assembly includes a blower 22, an aeration pipe and a gas flow meter 24. One end of the aeration pipe is connected to the blower 22, and the other end passes through the box 1 and extends into the inner bottom of the box 1. A plurality of aeration holes 25 are evenly distributed on the aeration pipe inside the box 1. The gas flow meter 24 is installed on the aeration pipe outside the box 1.

[0047] During aeration, blower 22 is activated to supply air to the sewage-sludge mixture, maintaining a stable dissolved oxygen concentration within the reactor and providing the necessary oxygen for subsequent worm growth and sludge reduction. A gas flowmeter 24 regulates the air flow, allowing for flexible adjustment of aeration intensity. This maximizes energy savings and reduces operating costs while ensuring effective treatment.

[0048] In a specific embodiment, the aeration tube is a variable micropore aeration tube 23, and the aperture of the aeration hole 25 varies in the range of 0.5 to 1.0 mm. Air is supplied to the sludge mixture by a mixture of continuous micro-aeration and intermittent strong disturbance aeration to maintain the dissolved oxygen concentration in the box 1 stable in the range of 1±0.5 mg / L.

[0049] Variable microporous aeration tubes 23 supply air to the sewage-sludge mixture through a combination of continuous micro-aeration and intermittent high-perturbation aeration. This allows for precise control of the gas supply to the sewage-sludge mixture, ensuring that the dissolved oxygen concentration in the reactor is maintained within the ideal range of 1±0.5 mg / L. This, in turn, provides the oxygen conditions required for worm growth, promoting their healthy growth and active metabolism. It also accelerates the decomposition and mineralization of organic matter in the sludge, significantly improving the efficiency and quality of sludge reduction treatment. It is worth noting that variable microporous aeration tubes 23 are prior art and are fully capable of being implemented by those skilled in the art, so they will not be described in detail here.

[0050] In a specific embodiment, see Figure 1 、 Figure 5 and Figure 6 The drainage assembly includes an outlet pipe 26, an outlet pump 27 and a slide rail 28. One end of the outlet pipe 26 is connected to the outlet pump 27, and the other end passes through the side of the box body 1 and extends into the box body 1. The slide rail 28 is U-shaped. The slide rail 28 is installed on the porous conveyor belt 3 and is slidably connected to the porous conveyor belt 3. The outlet pipe 26 passes through the slide rail 28 and abuts against the surface of the porous conveyor belt 3.

[0051] After the worms' biodegradation and effective treatment, the water outlet pump 27 is activated. At this point, the water outlet pipe 26 abuts the surface of the porous conveyor belt 3. As the porous conveyor belt 3 smoothly runs, the holes 10 therein draw the purified water. Once the water is transported to the position of the slide rails 28, the water outlet pipe 26, through suction, effectively draws the water from the holes 11 through the holes 10 and smoothly discharges it from the housing 1.

[0052] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention description and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A sludge reduction device with a special structure to strengthen the stable attachment of worms, characterized in that: The invention comprises a box body (1), a worm stuffing box (2), a porous conveyor belt (3), a mud inlet assembly, a water inlet assembly, an aeration assembly and a drainage assembly. Both sides of the worm stuffing box (2) are connected to a fixed plate (5) through a connecting rod (4). The two fixed plates (5) are provided with a mounting rod (6) and are connected to the box body (1) on the adjacent side. Rollers (7) are provided on the four sides of the fixed plate (5) on the outside of the worm stuffing box (2). Rollers (8) are fixedly sleeved on the four rollers (7). The roller (8) is connected to the roller by a linkage belt (9), the porous conveyor belt (3) is provided with a plurality of slots (10) arranged obliquely along the running direction of the porous conveyor belt (3), and a plurality of holes (11) are evenly provided in the slots (10), the porous conveyor belt (3) is tensioned and mounted on the roller (8), the roller shaft (7) is connected to the driving assembly, the mud inlet assembly and the water inlet assembly are both arranged above the porous conveyor belt (3), and the aeration assembly and the drainage assembly are both mounted in the box (1); The aeration assembly comprises a blower (22), an aeration pipe and a gas flow meter (24); one end of the aeration pipe is connected to the blower (22), and the other end passes through the box (1) and extends into the inner bottom of the box (1); a plurality of aeration holes (25) are evenly distributed on the aeration pipe inside the box (1); and the gas flow meter (24) is installed on the aeration pipe outside the box (1); The aeration tube is a variable micropore aeration tube (23), and the aperture of the aeration hole (25) varies in the range of 0.5 to 1.0 mm. Air is supplied to the sludge mixture by a mixture of continuous micro-aeration and intermittent strong disturbance aeration to maintain the dissolved oxygen concentration in the box (1) stable within the range of 1±0.5 mg / L.

2. The sludge reduction equipment with a special structure to strengthen the stable attachment of worms according to claim 1 is characterized in that: The top surface of the box body (1) is open, and baffles (12) inclined inwardly are symmetrically arranged on both sides of the opening. The two baffles (12) are each provided with a mounting groove (13). The two mounting rods (6) are placed in the mounting groove (13) on the adjacent side, and a gap is left between the fixing plate (5) and the two baffles (12).

3. The sludge reduction equipment with a special structure to strengthen the stable attachment of worms according to claim 1 is characterized in that: The driving assembly includes a servo motor (14), a coupling (15) and a base (16), wherein the base (16) is connected to the bottom of the mounting rod (6), and the servo motor (14) is mounted on the base (16) and is connected to the adjacent roller shaft (7) through the coupling (15).

4. The sludge reduction equipment with a special structure to strengthen the stable attachment of worms according to claim 1 is characterized in that: The roller (8) comprises a driving wheel (801) and a linkage wheel (802), wherein the driving wheel (801) and the linkage wheel (802) are both fixedly mounted on the roller shaft (7), the porous conveyor belt (3) is tensionedly mounted on the driving wheel (801), and the linkage belt (9) is tensionedly mounted on the linkage wheel (802).

5. The sludge reduction equipment with a special structure to strengthen the stable attachment of worms according to claim 1 is characterized in that: The mud inlet assembly comprises a mud inlet pump (17) and a mud inlet pipe (18), one end of the mud inlet pipe (18) is connected to the mud inlet pump (17), the other end of the mud inlet pipe (18) extends through the box body (1) and is arranged above the porous conveyor belt (3), and a plurality of mud outlets are evenly arranged below the mud inlet pipe (18).

6. The sludge reduction equipment with a special structure to strengthen the stable attachment of worms according to claim 5, characterized in that: The water inlet assembly comprises a water inlet pump (19) and a water inlet pipe (20); one end of the water inlet pipe (20) is in communication with the water inlet pump (19), and the other end extends through the box body (1) and is arranged above the mud inlet pipe (18).

7. The sludge reduction equipment with a special structure to strengthen the stable attachment of worms according to claim 6, characterized in that: One end of the water inlet pipe (20) extending into the box body (1) is connected to a movable flushing pipe (21).

8. A sludge reduction device with a special structure for strengthening the stable attachment of worms according to any one of claims 1 to 7, characterized in that: The drainage assembly includes a water outlet pipe (26), a water outlet pump (27) and a slide rail (28). One end of the water outlet pipe (26) is connected to the water outlet pump (27), and the other end passes through the side of the box body (1) and extends into the box body (1). The slide rail (28) is U-shaped. The slide rail (28) is installed on the porous conveyor belt (3) and is slidably connected to the porous conveyor belt (3). The water outlet pipe (26) passes through the slide rail (28) and abuts against the surface of the porous conveyor belt (3).

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