Humus soil screening and crushing integrated treatment device
The integrated humus screening and crushing processing device solves the problems of cumbersome processes and low efficiency of traditional equipment, and realizes efficient and low-cost humus treatment, ensuring the treatment effect and the harmless utilization of resources.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- BEIJING GREEN USE ENVIRONMENTAL PROTECTION SCI & TECH
- Filing Date
- 2025-07-04
- Publication Date
- 2026-06-16
AI Technical Summary
Existing humus treatment equipment is cumbersome to set up, inefficient, has a low degree of automation, and poor material uniformity, making it difficult to effectively remove pollutants and affecting the subsequent aerobic reaction. In addition, traditional treatment methods are costly and inefficient.
Design an integrated humus soil screening and crushing treatment device that integrates drum screening, crushing, mixing and high-temperature aerobic reaction. The drum screening structure screens large pieces of material, the crusher reduces the particle size, the mixing structure uniformly mixes thermophilic aerobic microorganisms, and the high-temperature aerobic reactor performs harmless treatment.
It achieves efficient screening, crushing, uniform mixing and harmless treatment of humus soil, improves treatment efficiency, reduces costs, and ensures that the treated nutrient soil meets landscaping standards, thus achieving the treatment goals of resource utilization, volume reduction and harmlessness.
Smart Images
Figure CN224358339U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of humus screening, specifically to an integrated humus screening and crushing processing device. Background Technology
[0002] Humus in my country generally suffers from complex material composition, wet stickiness, and poor dispersibility. During the composting process, it generates a large amount of acidic and alkaline organic matter, forming a source of pollution for organic matter, metals, and pathogens. After screening, most of the undegraded pollutants enter the humus, making it contaminated. Current treatment methods include mixing with clay, which can dilute pollutants but generates a large amount of humus, increasing costs and burdens, and transporting it to other treatment terminals. However, these methods are limited by geographical location and treatment capacity, making it difficult to achieve widespread and efficient treatment.
[0003] Traditional separate screening and crushing equipment makes the process cumbersome and inefficient. The equipment is rudimentary and has a low degree of automation, making it difficult to guarantee the processing effect. At the same time, the lack of an effective mixing structure leads to poor material uniformity, which affects the effect of subsequent aerobic reactions. To address this, we propose an integrated screening and crushing device for humus soil. Utility Model Content
[0004] To address the shortcomings of existing technologies, this utility model provides an integrated humus screening and crushing processing device, which solves the aforementioned problems.
[0005] To achieve the above-mentioned objectives, this utility model provides the following technical solution: an integrated humus screening and crushing processing device, comprising a housing, and further comprising:
[0006] A feed bend is provided on one side of the box body. One end of the feed bend is connected through the box body, and the other end of the feed bend faces the top surface of the box body and is close to the top surface of the box body.
[0007] The drum screening structure installed inside the box is used to screen out large pieces of humus.
[0008] The crusher is located on the side of the housing away from the feed bend, and the crusher's mounting plate is fixedly connected to the housing. The crusher is located below the drum screening structure.
[0009] The mixing structure is located inside the box, below the drum screening structure, and connected to the crusher.
[0010] The microbial feed pipe is installed inside the box and is connected to the top of the box. One end of the microbial feed pipe is above the mixing structure inside the box. The thermophilic and aerobic microorganisms in the microbial feed pipe are added to the mixing structure.
[0011] The high-temperature aerobic reactor is located inside the box, below the mixing structure.
[0012] Preferably, the roller screening structure includes a bearing and a roller. A bearing is fixedly connected to the inner wall of the box body on one side connected to the feed bend, and the bearing corresponds to the feed bend. Another bearing is fixedly connected to the inner wall of the box body on the side opposite to the bearing. The two bearings correspond to each other. A roller is connected to the box body. The roller is a cylinder with an opening at one end and filter holes on its cylindrical surface. The open end of the roller is fixedly connected to the inner ring of the bearing corresponding to the feed bend. The other end of the roller passes through the box body and is outside the box body. The cylindrical surface of the end of the roller that passes through the box body is fixedly connected to the inner ring of the other bearing.
[0013] Preferably, an annular rack is fixedly connected to the cylindrical surface of the roller, with the annular rack near the end of the roller outside the housing.
[0014] Preferably, the drum screening structure further includes a second motor, a support plate, and a gear. The bottom surface of the main body of the second motor is fixedly connected to one side wall of the inner chamber of the box. The second motor is located on the side where the box and the drum pass through each other. The second motor is located between the top surface of the box and the drum. A support plate is fixedly connected to the top surface of the inner chamber of the box. The support plate is close to the second motor and corresponds to the output shaft of the second motor. The output shaft of the second motor is rotatably connected to the support plate through a bearing seat. A gear is fixedly connected to the output shaft of the second motor. The gear meshes with the annular rack.
[0015] Preferably, the roller is connected to a discharge pipe through the cylindrical surface outside the housing, the discharge pipe corresponds to the feed hopper of the crusher, and a return pipe is installed at the discharge port of the crusher, with the other end of the return pipe facing the housing.
[0016] Preferably, a mixing hopper is fixedly connected inside the box, and the four sides of the mixing hopper are fixedly connected to the four inner walls of the box. The mixing hopper is located between the drum and the high-temperature aerobic reactor. The larger opening end of the mixing hopper faces the drum, and the end of the return pipe away from the crusher passes through the box and the mixing hopper inside the mixing hopper.
[0017] Preferably, the mixing structure includes a motor and a stirrer. The mounting surface of the output shaft of the motor is fixedly connected to the side of the housing away from the return pipe. One end of the output shaft of the motor passes through the housing and the mixing hopper and is rotatably connected to the housing. The stirrer is connected to the output shaft of the motor. The main shaft of the stirrer is fixedly connected to the motor. The stirrer is inside the mixing hopper.
[0018] Preferably, the end of the mixing hopper with the smaller aperture is connected to a mixing discharge pipe, and the other end of the mixing discharge pipe is connected to the inlet of the high-temperature aerobic reactor.
[0019] Preferably, a nutrient soil discharge pipe is installed at one end of the outlet of the high-temperature aerobic reactor, and the other end of the nutrient soil discharge pipe passes through the outside of the tank.
[0020] Compared with the prior art, this utility model provides an integrated processing device for screening and crushing humus soil, which has the following beneficial effects:
[0021] This integrated humus screening and crushing treatment device combines screening, crushing, mixing, and high-temperature aerobic reaction functions into a single sealed chamber through integrated design. It effectively solves the problems of cumbersome processes, low efficiency, poor material uniformity, and easy secondary pollution caused by traditional treatment methods. It achieves efficient screening, crushing, uniform mixing, and harmless treatment of humus, which can significantly improve treatment efficiency and reduce costs. At the same time, it ensures that the treated nutrient soil meets the standards for landscaping and greening, thus achieving the treatment goals of resource utilization, volume reduction, and harmlessness. Attached Figure Description
[0022] Figure 1 This is a schematic diagram of the structure of this utility model;
[0023] Figure 2 This is an exploded view of the structure of this utility model;
[0024] Figure 3 This is a cross-sectional schematic diagram of the drum screening structure of this utility model;
[0025] Figure 4 for Figure 3 A magnified view of part A in the diagram.
[0026] In the diagram: 1. Box body; 2. Drum; 3. Feed bend; 4. Crusher; 5. Discharge pipe; 6. Motor 1; 7. Microbial feed pipe; 8. Nutrient soil discharge pipe; 9. Motor 2; 10. Gear; 11. Ring rack; 12. Return pipe; 13. Mixing hopper; 14. Agitator; 15. High-temperature aerobic reactor; 16. Mixed material discharge pipe; 17. Support plate; 18. Bearing. Detailed Implementation
[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0028] Please see Figure 1-4 An integrated humus screening and crushing processing device includes a housing 1, and further includes:
[0029] The feed bend 3 is located on one side of the box body 1. One end of the feed bend 3 is connected through the box body 1, and the other end of the feed bend 3 faces the top surface of the box body 1 and is close to the top surface of the box body 1.
[0030] The drum screening structure installed inside box 1 is used to screen out large pieces of humus.
[0031] The crusher 4 is located on the side of the housing 1 away from the feed bend 3. The mounting plate of the crusher 4 is fixedly connected to the housing 1. The crusher 4 is located below the drum screening structure.
[0032] The mixing structure is set inside the housing 1, below the drum screening structure, and is connected to the crusher 4.
[0033] The microbial feed pipe 7 is installed inside the box 1 and is connected to the top of the box 1. One end of the microbial feed pipe 7 inside the box 1 is above the mixing structure. The thermophilic aerobic microorganisms in the microbial feed pipe 7 are added into the mixing structure.
[0034] The high-temperature aerobic reactor 15 is installed inside the housing 1, and is located below the mixing structure.
[0035] Furthermore, the drum screening structure includes a bearing 18 and a drum 2. A bearing 18 is fixedly connected to the inner wall of the box 1 on one side connected to the feed bend 3. The bearing 18 corresponds to the feed bend 3. Another bearing 18 is fixedly connected to the inner wall of the box 1 on the side opposite to the bearing 18. The two bearings 18 correspond to each other. A drum 2 is connected inside the box 1. The drum 2 is a cylinder with an opening at one end and filter holes on its cylindrical surface. The opening end of the drum 2 is fixedly connected to the inner ring of the bearing 18 corresponding to the feed bend 3. The other end of the drum 2 passes through the box 1 and is outside the box 1. The cylindrical surface of the drum 2 passing through the box 1 is fixedly connected to the inner ring of the other bearing 18. The bearing 18 is used to install the drum 2. The drum 2 rotates inside the box 1. Humus enters the drum 2 from the feed bend 3.
[0036] Furthermore, an annular rack 11 is fixedly connected to the cylindrical surface of the roller 2. The annular rack 11 is located near the end of the roller 2 outside the housing 1 and is used to drive the roller 2 to rotate.
[0037] Furthermore, the drum screening structure also includes a second motor 9, a support plate 17, and a gear 10. The bottom surface of the main body of the second motor 9 is fixedly connected to one side wall inside the box 1. The second motor 9 is located on the side where the box 1 and the drum 2 pass through each other. The second motor 9 is located between the top surface of the box 1 and the drum 2. The support plate 17 is fixedly connected to the top surface inside the box 1. The support plate 17 is close to the second motor 9 and corresponds to the output shaft of the second motor 9. The output shaft of the second motor 9 is rotatably connected to the support plate 17 through a bearing seat. The gear 10 is fixedly connected to the output shaft of the second motor 9. The gear 10 meshes with the ring rack 11. The second motor 9 is used to drive the drum 2 to rotate. The support plate 17 is used to stabilize the second motor 9. The ring rack 11 and the gear 10 transmit the rotational force of the second motor 9 to the drum 2. When the drum 2 rotates, large pieces of humus are rolled to the closed end of the drum 2, and small pieces of humus fall from the filter holes of the drum 2.
[0038] Furthermore, a discharge pipe 5 is connected through the cylindrical surface of the drum 2 outside the housing 1. The discharge pipe 5 corresponds to the feed hopper of the crusher 4. A return pipe 12 is installed at the discharge port of the crusher 4. The other end of the return pipe 12 faces the housing 1. The discharge pipe 5 is used to discharge large pieces of humus from the drum 2. The discharge pipe 5 rotates with the drum 2. When the discharge pipe 5 is vertically downward toward the crusher 4, large pieces of humus fall into the crusher 4. After the crusher 4 crushes the large pieces of humus, they enter the return pipe 12.
[0039] Furthermore, a mixing hopper 13 is fixedly connected inside the housing 1. The four sides of the mixing hopper 13 are fixedly connected to the four inner walls of the housing 1. The mixing hopper 13 is located between the drum 2 and the high-temperature aerobic reactor 15. The larger opening end of the mixing hopper 13 faces the drum 2. The end of the return pipe 12 away from the crusher 4 passes through the housing 1 and the mixing hopper 13. The mixing hopper 13 is used to mix humus and thermophilic aerobic microorganisms. The humus in the return pipe 12 and the drum 2 falls into the mixing hopper 13.
[0040] Furthermore, the mixing structure includes a motor 6 and a mixer 14. The mounting surface of the output shaft of the motor 6 is fixedly connected to the side of the housing 1 away from the return pipe 12. One end of the output shaft of the motor 6 passes through the housing 1 and the mixing hopper 13 and is rotatably connected to the housing 1. The mixer 14 is connected to the output shaft of the motor 6. The main shaft of the mixer 14 is fixedly connected to the motor 6. The mixer 14 is inside the mixing hopper 13. The motor 6 is used to drive the mixer 14 to rotate. The mixer 14 rotates inside the mixing hopper 13 to mix humus and thermophilic aerobic microorganisms.
[0041] Furthermore, the mixing hopper 13 with a smaller aperture is connected to a mixing discharge pipe 16, and the other end of the mixing discharge pipe 16 is connected to the inlet of the high-temperature aerobic reactor 15. The mixing discharge pipe 16 is used to connect the mixing hopper 13 and the high-temperature aerobic reactor 15.
[0042] Furthermore, a nutrient soil discharge pipe 8 is installed at one end of the outlet of the high-temperature aerobic reactor 15, and the other end of the nutrient soil discharge pipe 8 passes through the box 1 and is located outside the box 1. The nutrient soil discharge pipe 8 is used to discharge the reacted nutrient soil outside the high-temperature aerobic reactor 15 and the box 1.
[0043] Structural Description:
[0044] Box 1: A three-dimensional shell structure that serves as the main frame of the device, providing installation space for each component and forming a relatively closed treatment environment to prevent secondary pollution;
[0045] Drum 2: A cylindrical drum with one open end and filter holes on the cylindrical surface. When it rotates, it screens humus. Small pieces of material fall through the filter holes, while large pieces of material roll toward the closed end to achieve particle size separation.
[0046] Feed bend 3: A curved tubular structure, one end of which is connected to the box 1, and the other end faces the top surface of the box and is close to the top surface, guiding the humus from the top surface of the box into the roller 2 to ensure smooth material feeding.
[0047] Crusher 4: The equipment installed in the housing 1 receives large pieces of humus discharged from the drum 2 through the feed hopper, crushes them and discharges them through the discharge port, thereby reducing the particle size of the material.
[0048] Discharge pipe 5: A tubular structure that runs through the outer cylindrical surface of the drum 2 housing 1. As the drum rotates, it discharges large pieces of humus into the feed hopper of the crusher 4 when it rotates vertically downward.
[0049] Motor 6: A power unit installed on the housing 1, with its output shaft passing through the housing and the mixing hopper 13, driving the agitator 14 to rotate to mix the materials;
[0050] Microbial feed pipe 7: A tubular structure that runs through the top of the box 1, with one end inside the box located above the mixing structure, used to add thermophilic aerobic microorganisms into the mixing structure;
[0051] Nutrient soil discharge pipe 8: One end is connected to the discharge port of the high temperature aerobic reactor 15, and the other end passes through the tubular structure of the box 1 to discharge the nutrient soil after the reaction is completed.
[0052] Motor 29: A power unit whose main body bottom surface is fixed to the inner side wall of the housing 1. Its output shaft meshes with the ring rack 11 through the gear 10 to drive the roller 2 to rotate.
[0053] Gear 10: A circular gear mounted on the output shaft of motor 29, meshing with the ring rack 11 to transmit power to drive the drum 2 to rotate;
[0054] Annular rack 11: An annular toothed structure fixed on the cylindrical surface of the drum 2, meshing with gear 10 to convert the power of motor 2 9 into the rotational power of drum 2.
[0055] Return pipe 12: A tubular structure with one end connected to the discharge port of crusher 4 and the other end passing through box 1 and mixing hopper 13, conveying the crushed material to mixing hopper 13;
[0056] Mixing hopper 13: A funnel-shaped structure fixed to the inner wall of the box 1 on all four sides, with the large-diameter opening facing the drum 2, collecting small pieces of material after screening, crushed return material and microorganisms and providing a mixing space;
[0057] Agitator 14: A bladed main shaft structure installed in the mixing hopper 13, which rotates under the drive of motor 6 to mix humus and microorganisms to make the material uniform.
[0058] High-temperature aerobic reactor 15: A reaction device located below the mixing structure, with an inlet and an outlet, providing a high-temperature aerobic environment so that microorganisms decompose humus to generate nutrient soil;
[0059] Mixed material discharge pipe 16: A tubular structure with one end connected to the small diameter end of the mixing hopper 13 and the other end connected to the feed inlet of the high temperature aerobic reactor 15, conveying the uniformly mixed material to the reactor.
[0060] Support plate 17: A plate-like structure fixed to the top surface inside the housing 1, supporting the output shaft of motor 9 and stabilizing motor operation;
[0061] Bearing 18: Corresponding to the annular structure installed on the inner wall of housing 1, it supports roller 2 so that it can rotate inside the housing.
[0062] Working principle: Humus enters through the feed bend 3 on the top surface of the box 1. Since the feed bend 3 is close to the top surface of the box and one end is connected to the box, the material can fall smoothly into the drum 2. The output shaft of motor 2 9 drives gear 10 to rotate. Gear 10 meshes with the ring rack 11 on the cylindrical surface of drum 2, transmitting power to drum 2, which rotates under the support of bearing 18. Drum 2 is a cylinder with one open end and filter holes on its cylindrical surface. When rotating, small pieces of humus (particle size smaller than the filter holes) fall through the filter holes, while larger pieces of material are retained inside the drum due to their larger particle size and roll towards the closed end as the drum rotates. The discharge pipe 5 on the outside of drum 2 rotates with the drum. When the drum is rotated to the vertical downward position, large, unscreened humus pieces inside the drum fall from the discharge pipe 5 into the feed hopper of the crusher 4 below. The crusher 4 crushes the large pieces of material, reducing their particle size. The crushed material enters the return pipe 12 through the crusher discharge port. The other end of the return pipe 12 passes through the housing 1 and the mixing hopper 13, conveying the crushed material to the mixing structure, where it merges with the screened small pieces of humus. The screened small pieces of humus fall directly into the mixing hopper 13. The crushed material enters the mixing hopper 13 through the return pipe 12. At the same time, thermophilic aerobic microorganisms are added from the microbial feed pipe 7 at the top of the housing, falling above the mixing structure. Motor 6 drives... The agitator 14 rotates within the mixing hopper 13, thoroughly mixing the humus and microorganisms through the rotation of the agitator blades to ensure material uniformity and lay the foundation for the subsequent high-temperature aerobic reaction. The uniformly mixed humus and microorganism mixture enters the high-temperature aerobic reactor 15 through the discharge pipe 16 at the bottom of the mixing hopper 13. Inside the high-temperature aerobic reactor 15, thermophilic aerobic microorganisms decompose organic matter and pollutants in the humus under suitable temperature and oxygen conditions, converting them into humic acid and other components that are easily absorbed by plants. The reaction time is controlled to be one to two days. The resulting nutrient soil is discharged from the high-temperature aerobic reactor 15 after the reaction is completed. The nutrient soil discharge pipe 8 exits the box 1 and can be directly used for landscaping or further processing. By integrating functional modules such as screening, crushing, mixing, and reaction into the box 1, the material transmission path is shortened, intermediate losses are reduced, and processing efficiency is improved. Motor 2 9 and the gear-rack mechanism realize the automatic rotation and screening of the drum 2. Motor 1 6 drives the agitator 14 to achieve uniform mixing of materials, reduce manual intervention, and ensure the stability and consistency of the processing process. The overall structure of the device forms a relatively closed processing environment. Combined with the closed design of the high-temperature aerobic reactor 15, it effectively prevents the generation of secondary pollution such as dust and odor during the processing.
[0063] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. An integrated humus screening and crushing processing device, comprising a housing (1), characterized in that, Also includes: The feed bend (3) is provided on one side of the box (1). One end of the feed bend (3) is connected through the box (1), and the other end of the feed bend (3) faces the top surface of the box (1) and the feed bend (3) is close to the top surface of the box (1). The drum screening structure set inside the box (1) is used to screen out large pieces of humus. The crusher (4) is located on the side of the box (1) away from the feed bend (3). The mounting plate of the crusher (4) is fixedly connected to the box (1). The crusher (4) is located below the drum screening structure. The mixing structure is set inside the box (1), below the drum screening structure, and connected to the crusher (4); The microbial feed pipe (7) is installed inside the box (1). The microbial feed pipe (7) is connected to the top of the box (1). One end of the microbial feed pipe (7) inside the box (1) is above the mixing structure. The thermophilic aerobic microorganisms in the microbial feed pipe (7) are added to the mixing structure. The high-temperature aerobic reactor (15) is installed inside the box (1) and is located below the mixing structure.
2. The integrated humus screening and crushing processing device according to claim 1, characterized in that, The roller screening structure includes a bearing (18) and a roller (2). The bearing (18) is fixedly connected to the inner wall of the box (1) on one side connected to the feed bend (3). The bearing (18) corresponds to the feed bend (3). Another bearing (18) is fixedly connected to the inner wall of the box (1) on the side opposite to the bearing (18). The two bearings (18) correspond to each other. The roller (2) is connected to the box (1). The roller (2) is a cylinder with an opening at one end and filter holes on its cylindrical surface. The opening end of the roller (2) is fixedly connected to the inner ring of the bearing (18) corresponding to the feed bend (3). The other end of the roller (2) penetrates the box (1) and is outside the box (1). The cylindrical surface of the roller (2) penetrating the box (1) is fixedly connected to the inner ring of the other bearing (18).
3. The integrated humus screening and crushing processing device according to claim 2, characterized in that, A ring-shaped rack (11) is fixedly connected to the cylindrical surface of the roller (2), with the ring-shaped rack (11) near the end of the roller (2) outside the box (1).
4. The integrated humus screening and crushing processing device according to claim 3, characterized in that, The drum screening structure also includes a second motor (9), a support plate (17), and a gear (10). The bottom surface of the main body of the second motor (9) is fixedly connected to one side wall of the inner side of the box (1). The second motor (9) is located on the side where the box (1) and the drum (2) pass through. The second motor (9) is located between the top surface of the box (1) and the drum (2). The support plate (17) is fixedly connected to the top surface of the inner side of the box (1). The support plate (17) is close to the second motor (9) and corresponds to the output shaft of the second motor (9). The output shaft of the second motor (9) is rotatably connected to the support plate (17) through a bearing seat. The gear (10) is fixedly connected to the output shaft of the second motor (9). The gear (10) meshes with the annular rack (11).
5. The integrated humus screening and crushing processing device according to claim 2, characterized in that, The roller (2) is connected to the discharge pipe (5) through the cylindrical surface outside the box (1). The discharge pipe (5) corresponds to the feed hopper of the crusher (4). The discharge port of the crusher (4) is equipped with a return pipe (12), and the other end of the return pipe (12) faces the box (1).
6. The integrated humus screening and crushing processing device according to claim 5, characterized in that, A mixing hopper (13) is fixedly connected inside the box (1). The four sides of the mixing hopper (13) are fixedly connected to the four inner walls of the box (1). The mixing hopper (13) is located between the drum (2) and the high-temperature aerobic reactor (15). The large opening end of the mixing hopper (13) faces the drum (2). The end of the return pipe (12) away from the crusher (4) passes through the box (1) and the mixing hopper (13) inside the mixing hopper (13).
7. The integrated humus screening and crushing processing device according to claim 6, characterized in that, The mixing structure includes a motor (6) and a stirrer (14). The mounting surface of the output shaft of the motor (6) is fixedly connected to the side of the housing (1) away from the return pipe (12). One end of the output shaft of the motor (6) passes through the housing (1) and the mixing hopper (13) and is rotatably connected to the housing (1). The stirrer (14) is connected to the output shaft of the motor (6). The main shaft of the stirrer (14) is fixedly connected to the motor (6). The stirrer (14) is inside the mixing hopper (13).
8. The integrated humus screening and crushing processing device according to claim 6, characterized in that, The mixing hopper (13) with a small aperture is connected to a mixing discharge pipe (16), and the other end of the mixing discharge pipe (16) is connected to the inlet of the high-temperature aerobic reactor (15).
9. The integrated humus screening and crushing processing device according to claim 8, characterized in that, The high-temperature aerobic reactor (15) has a nutrient soil discharge pipe (8) installed at one end of its outlet, and the other end of the nutrient soil discharge pipe (8) passes through the box (1) and is outside the box (1).