Coke cleaning mechanism for coal acetylene plasma reaction
By designing a coal-to-acetylene plasma reactor coking mechanism containing uniformly distributed ultrasonic transducer and intelligent drainage system, the existing coking mechanism is complex and difficult to achieve uniform cleaning, and an efficient, stable and environmentally friendly cleaning effect is achieved.
Patent Information
- Application Number
- CN202421363238.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-15
- Publication Date
- 2025-03-21
- Estimated Expiration
- 2034-06-15
AI Technical Summary
The existing coal-to-acetylene plasma reactors have relatively complex coking mechanisms, high operating and maintenance costs, and are difficult to achieve uniform cleaning, which affects the operating efficiency and production stability of the reactor.
A coking mechanism including a support column, a fixing frame, a reaction vessel and a base is designed. The base is equipped with a first sealing ring and a first sewage tank. The fixing frame is inlaid with a uniformly distributed ultrasonic transducer, and is equipped with a flushing tube and a second sewage tank. Intelligent drainage and sealing are achieved through the sealing plate and the second sealing ring.
It achieves uniform cleaning effect, improves cleaning coverage and stability, extends equipment life, reduces operating risks and maintenance costs, and effectively prevents sewage leakage and reduces environmental pollution.
Smart Images
Figure CN222641977U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of chemical industry, in particular to a coke cleaning mechanism for a plasma reaction of coal to acetylene. Background Art
[0002] The coal-to-acetylene plasma reaction is a chemical process that uses plasma technology to convert coal into acetylene. This technology has the advantages of high efficiency and environmental protection, and is an important coal chemical process. Decoking refers to the process of removing coke and other solid deposits accumulated in the coal-to-acetylene plasma reactor. The coke accumulation problem is more common in plasma reactors, because coal will generate some solid carbon and other deposits during the high-temperature cracking process. If these deposits are not removed in time, they will affect the operating efficiency and production stability of the reactor. The decoking mechanism of the existing technology is relatively complex, and operators and maintenance personnel need to spend more time and energy to manage and maintain the system, which increases costs and risks. Utility Model Content
[0003] The utility model provides a coke cleaning mechanism for coal-to-acetylene plasma reaction, which solves the above-mentioned technical problems.
[0004] The utility model solves the above-mentioned technical problems as follows:
[0005] A decoking mechanism for coal-to-acetylene plasma reaction comprises a support column, a fixing frame, a reaction vessel and a base, wherein the outer side of the base is provided with a support column, the inner side of the base is provided with a first sealing ring, the bottom end of the base is penetrated by a first sewage trough, the base is provided with a fixing frame, an ultrasonic transducer is embedded on the fixing frame, a flushing pipe is provided on the fixing frame, a reaction vessel is provided on the base and located on the outer side cover of the fixing frame, the bottom end of the flushing pipe is connected to a connecting pipe, the outer side of one end of the flushing pipe close to the connecting pipe is provided with a support plate, the bottom end of the base is supported by a sealing plate through the supporting plate, and the first sewage trough of the base is blocked by the sealing plate.
[0006] On the basis of the above technical solution, the present invention can also be improved as follows.
[0007] Furthermore, the ultrasonic transducers are evenly distributed on the fixing frame.
[0008] The beneficial effects of adopting the above further scheme are:
[0009] Uniform cleaning effect: By evenly distributing the ultrasonic transducers on the fixed frame, it can be ensured that the ultrasonic vibration can be evenly transmitted to every corner and surface in the reactor. This can ensure that the cleaning effect inside the entire reactor is uniform and consistent, avoiding dead corners or incomplete local cleaning.
[0010] Improve cleaning coverage: Evenly distributed ultrasonic transducers can cover a wider area, ensuring that every part can be fully cleaned. This can effectively reduce the accumulation of deposits and coke inside the reactor and improve cleaning efficiency.
[0011] Stable cleaning process: Evenly distributed ultrasonic transducers can maintain the stability of the cleaning process. If the ultrasonic energy is not evenly distributed, it may cause over-cleaning in some areas and under-cleaning in other areas, affecting the consistency and controllability of the cleaning effect.
[0012] Prolong equipment life: Evenly distributed ultrasonic transducers can reduce local excessive vibration or wear, thereby extending the service life of the ultrasonic transducers. This is beneficial to the maintenance and operating costs of the equipment.
[0013] Improve operational safety: Evenly distributed ultrasonic transducers can reduce unstable factors in the cleaning process and reduce operational risks caused by uneven cleaning. This helps to improve the safety and reliability of cleaning operations.
[0014] Furthermore, the reaction container and the base are sealed by a first sealing ring.
[0015] The beneficial effects of adopting the above further scheme are:
[0016] Prevent leakage: The first seal ring provides reliable sealing performance, effectively preventing sewage, reaction products or cleaning liquids between the reaction vessel and the base from leaking to the outside of the equipment. This ensures a clean and safe working environment.
[0017] Maintaining the working environment: The effective sealing of the sealing ring prevents the sewage or reaction products inside the reactor from leaking out, keeping the working environment clean and tidy. This helps to improve work efficiency and the working comfort of employees.
[0018] Reduce environmental pollution: By effectively sealing the connection between the reaction vessel and the base, the first seal can prevent harmful substances from leaking into the environment, reducing environmental pollution and the impact on the ecosystem.
[0019] Operational safety: The well-sealed reaction vessel and base connection can reduce the occurrence of accidents. By preventing the leakage of sewage or reaction products, the risk of operators being exposed to harmful substances is reduced, and operational safety is improved.
[0020] Furthermore, a second drainage groove is formed through the sealing plate, and the position and size of the second drainage groove are matched with those of the first drainage groove.
[0021] The beneficial effects of adopting the above further scheme are:
[0022] Smooth drainage: When the first drain trough and the second drain trough are aligned, the two drainage channels form a continuous drainage system, ensuring that the sewage can be discharged smoothly from the reaction vessel and the ultrasonic transducer. This can prevent sewage from accumulating in the reactor and keep the inside of the reactor clean and working efficiently.
[0023] Prevent sewage from leaking out: When the second drain tank is misaligned with the first drain tank, the sealing plate blocks the first drain tank of the base to prevent sewage from overflowing or leaking out of the first drain tank. This design ensures that sewage will not flow out of the equipment during the cleaning process, avoiding environmental pollution and pollution in the workplace.
[0024] Furthermore, when the second sewage drain trough is aligned with the first sewage drain trough, sewage between the reaction container and the ultrasonic transducer is discharged through the first sewage drain trough and the second sewage drain trough.
[0025] The beneficial effects of adopting the above further scheme are:
[0026] Smooth drainage: When the first drain trough and the second drain trough are aligned, the two drainage channels form a continuous drainage system, ensuring that the sewage can be discharged smoothly from the reaction vessel and the ultrasonic transducer. This can prevent sewage from accumulating in the reactor and keep the inside of the reactor clean and working efficiently.
[0027] Improve cleaning effect: Through the continuous drainage of the first and second drainage troughs, the sewage generated during the cleaning process can be discharged from the reaction vessel and the ultrasonic transducer in time, avoiding the pollution and re-adhesion of dirt caused by the sewage staying in the equipment. This helps to improve the cleaning effect and ensure the thorough cleaning of the reactor interior.
[0028] Reduce cleaning time: The continuous drainage system can quickly and effectively remove sewage, reducing the downtime during the cleaning process. Operators can complete the cleaning work faster, improve cleaning efficiency, and shorten the production cycle.
[0029] Furthermore, when the second sewage drain groove is misaligned with the first sewage drain groove, the first sewage drain groove of the base is blocked by a sealing plate.
[0030] The beneficial effects of adopting the above further scheme are:
[0031] Prevent sewage from leaking out: When the second drain tank is misaligned with the first drain tank, the sealing plate blocks the first drain tank of the base to prevent sewage from overflowing or leaking out of the first drain tank. This design ensures that sewage will not flow out of the equipment during the cleaning process, avoiding environmental pollution and pollution in the workplace.
[0032] Keep the working environment clean: By blocking the first sewage tank, the sewage is effectively trapped inside the equipment, keeping the working environment clean and tidy. This helps improve work efficiency and employee comfort.
[0033] Protect equipment: The sealing of the sealing plate can prevent sewage from eroding and corroding the base and other equipment parts, extending the service life of the equipment and reducing the cost of equipment maintenance and repair.
[0034] Operational safety: The sealing of the sealing plate ensures the safety of the cleaning process. Preventing the leakage of sewage reduces the risk of workers being exposed to harmful substances and improves the safety and reliability of operations.
[0035] Furthermore, second sealing rings are provided on both sides of the second sewage trough on the sealing plate, and the second sealing rings increase the sealing between the base and the sealing plate to prevent sewage from leaking from the gap between the first sewage trough and the second sewage trough.
[0036] The beneficial effects of adopting the above further scheme are:
[0037] Improved sealing: The second sealing ring is set on both sides of the sealing plate to increase the sealing between the base and the sealing plate. This ensures that the sewage generated during the cleaning process will not leak into the external environment through the gap between the base and the sealing plate, effectively preventing the leakage of sewage.
[0038] Protect the environment: By enhancing the sealing performance, the second sealing ring can effectively prevent sewage from leaking from the inside of the equipment to the surrounding environment, reducing pollution to the environment. This helps to protect the cleanliness and ecological balance of the surrounding environment.
[0039] Preventing sewage from stagnating: The sealing performance of the second seal ring effectively prevents sewage from stagnating in the gap between the first and second drain troughs. This helps keep the drainage system unobstructed and avoids the risk of reduced cleaning effect or equipment damage caused by sewage stagnation.
[0040] Extend equipment life: By preventing sewage leakage and retention, the second seal helps protect equipment components such as the base and cover plate from sewage erosion and corrosion, extending the service life of the equipment and reducing the cost of equipment maintenance and repair.
[0041] Improve operational safety: Maintaining the sealing performance of the drainage system helps reduce operational risks caused by sewage leakage and improves the safety and working comfort of operators.
[0042] The beneficial effects of the utility model are:
[0043] The ultrasonic transducer located on the fixed frame adopts ultrasonic technology. By converting electrical energy into ultrasonic vibration energy, it can generate high-frequency, high-intensity sound waves. When these sound waves propagate inside the reactor, they will generate strong washing force, thoroughly cleaning the inner wall and corners of the reactor, removing coke and other deposits.
[0044] The flushing pipe further enhances the cleaning effect. The flushing pipe works in conjunction with the ultrasonic transducer to flush the inner wall of the reactor with high-pressure water flow, effectively removing stubborn deposits that are difficult to remove and ensuring the cleanliness of the reactor interior.
[0045] The first sealing ring is arranged inside the base, and the second sealing ring is arranged on the sealing plate, which provide excellent sealing performance. They can effectively prevent the sewage and reaction products generated inside the reactor from leaking into the environment, ensuring the cleanliness and safety of the workplace.
[0046] When the first drain chute is aligned with the second drain chute, the sewage is discharged smoothly. When they are misaligned, the sealing plate blocks the first drain chute to ensure that the sewage inside the reactor will not leak out, thereby ensuring the intelligent operation of the entire cleaning system.
[0047] The precise drainage system and sealing design can effectively prevent sewage leakage and reduce environmental pollution. In addition, the cleaning process uses ultrasonic and high-pressure water technology, which can save water resources, reduce energy consumption, and achieve environmental protection and energy saving compared to traditional cleaning methods.
[0048] In summary, the decoking mechanism provides a reliable solution for the cleaning of coal-to-acetylene plasma reactors through its design of efficient cleaning, excellent sealing performance, simple structure, stability and reliability, and environmental protection and energy saving. It also provides a safer and more environmentally friendly cleaning technology for industrial production.
[0049] The above description is only an overview of the technical solution of the utility model. In order to more clearly understand the technical means of the utility model and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiment of the utility model with the accompanying drawings. The specific implementation method of the utility model is given in detail by the following embodiments and their drawings. BRIEF DESCRIPTION OF THE DRAWINGS
[0050] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present application. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.
[0051] In the attached picture:
[0052] Figure 1 This is a schematic diagram of the main structure of the utility model;
[0053] Figure 2 This is a schematic diagram of the base sealing axial side explosion structure of the utility model;
[0054] Figure 3 It is a schematic diagram of the axial side explosion structure of the base with sewage discharge of the utility model.
[0055] In the accompanying drawings, the components represented by the reference numerals are listed as follows:
[0056] 1. Support column; 2. First sealing ring; 3. Ultrasonic transducer; 4. Fixed frame; 5. Reaction container; 6. Flushing pipe; 7. Base; 8. First sewage trough; 9. Second sewage trough; 10. Connecting pipe; 11. Support plate; 12. Sealing plate; 13. Second sealing ring. DETAILED DESCRIPTION
[0057] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0058] See also Figures 1 to 3 As shown, the embodiments provided by the utility model:
[0059] Embodiment 1
[0060] A decoking mechanism for coal-to-acetylene plasma reaction comprises a support column 1, a fixing frame 4, a reaction vessel 5 and a base 7, wherein the support column 1 is arranged on the outer side of the base 7, a first sealing ring 2 is arranged on the inner side of the base 7, a first drainage groove 8 is penetrated and opened at the bottom end of the base 7, a fixing frame 4 is arranged on the base 7, an ultrasonic transducer 3 is inlaid on the fixing frame 4, and the ultrasonic transducer 3 is evenly distributed on the fixing frame 4. By evenly distributing the ultrasonic transducers 3 on the fixing frame 4, it can be ensured that the ultrasonic vibration can be evenly propagated to every corner and surface in the reactor. In this way, the cleaning effect inside the entire reactor can be ensured to be uniform and consistent, and the situation of dead corners or incomplete local cleaning can be avoided. The evenly distributed ultrasonic transducers 3 can cover a wider area, ensuring that each part can be fully cleaned. In this way, the accumulation of sediments and coke inside the reactor can be effectively reduced, and the cleaning efficiency is improved. The evenly distributed ultrasonic transducers 3 can maintain the stability of the cleaning process. If the ultrasonic energy is unevenly distributed, some areas may be over-cleaned, while other areas may be under-cleaned, affecting the consistency and controllability of the cleaning effect. The uniformly distributed ultrasonic transducers 3 can reduce local excessive vibration or wear, thereby extending the service life of the ultrasonic transducers 3. This is beneficial to the maintenance and operation costs of the equipment. The uniformly distributed ultrasonic transducers 3 can reduce the unstable factors in the cleaning process and reduce the operational risks caused by uneven cleaning. This helps to improve the safety and reliability of the cleaning operation. The fixing frame 4 is provided with a flushing pipe 6, and the base 7 is provided with a reaction vessel 5 on the outer cover of the fixing frame 4. The reaction vessel 5 and the base 7 are sealed by a first sealing ring 2. The first sealing ring 2 provides a reliable sealing performance, which effectively prevents the sewage, reaction products or cleaning liquid and other substances between the reaction vessel 5 and the base 7 from leaking to the outside of the equipment. This ensures the cleanliness and safety of the working environment. The effective sealing of the sealing ring prevents the sewage or reaction products inside the reactor from leaking out, and keeps the working environment clean and tidy. This helps to improve work efficiency and the comfort of employees. By effectively sealing the connection between the reaction vessel 5 and the base 7, the first sealing ring 2 can prevent harmful substances from leaking into the environment, reducing environmental pollution and the impact on the ecosystem. The connection between the reaction vessel 5 and the base 7 with good sealing performance can reduce the occurrence of accidents.By preventing the leakage of sewage or reaction products, the risk of operators contacting harmful substances is reduced, and the operating safety is improved. The bottom end of the flushing pipe 6 is connected to a connecting pipe 10, and a support plate 11 is provided on the outer side of one end of the flushing pipe 6 close to the connecting pipe 10. A sealing plate 12 is placed on the bottom end of the base 7 through the support plate 11. The sealing plate 12 is manually rotated by the user, and the first sewage discharge groove 8 of the base 7 is blocked by the sealing plate 12. A second sewage discharge groove 9 is opened through the sealing plate 12. The sealing plate 12 is provided with a second sealing ring 13 on both sides of the second sewage discharge groove 9. The second sealing ring 13 increases the sealing between the base 7 and the sealing plate 12, and prevents the sewage from leaking from the gap between the first sewage discharge groove 8 and the second sewage discharge groove 9. The second sealing ring 13 is arranged on both sides of the sealing plate 12, which increases the sealing between the base 7 and the sealing plate 12. This ensures that the sewage generated during the cleaning process will not leak to the external environment through the gap between the base 7 and the sealing plate 12, and effectively prevents the leakage of sewage. By enhancing the sealing performance, the second sealing ring 13 can effectively prevent sewage from leaking from the inside of the equipment into the surrounding environment, reducing pollution to the environment. This helps to protect the cleanliness and ecological balance of the surrounding environment. The sealing performance of the second sealing ring 13 effectively prevents sewage from being retained in the gap between the first sewage trough 8 and the second sewage trough 9. This helps to keep the drainage system unobstructed and avoids the risk of reduced cleaning effect or equipment damage caused by sewage retention. By preventing sewage leakage and retention, the second sealing ring 13 helps to protect equipment components such as the base 7 and the sealing plate 12 from sewage erosion and corrosion, extending the service life of the equipment and reducing the cost of equipment maintenance and repair. Maintaining the sealing performance of the drainage system helps to reduce the operational risks caused by sewage leakage, improves the safety and working comfort of the operators, the second drainage trough 9 is adapted to the position and size of the first drainage trough 8, when the second drainage trough 9 is aligned with the first drainage trough 8, the sewage between the reaction vessel 5 and the ultrasonic transducer 3 is discharged through the first drainage trough 8 and the second drainage trough 9, when the first drainage trough 8 and the second drainage trough 9 are aligned, the two drainage channels form a continuous drainage system, ensuring that the sewage can be smoothly discharged from between the reaction vessel 5 and the ultrasonic transducer 3. This can prevent sewage from accumulating in the reactor and maintain the cleanliness and work efficiency of the reactor. Through the continuous drainage of the first drainage trough 8 and the second drainage trough 9, the sewage generated during the cleaning process can be discharged from between the reaction vessel 5 and the ultrasonic transducer 3 in time, avoiding the pollution and re-attachment of dirt caused by the sewage staying in the equipment. This helps to improve the cleaning effect and ensure the thorough cleaning of the reactor. The continuous drainage system can quickly and effectively remove sewage and reduce the pause time during the cleaning process.The operator can complete the cleaning work faster, improve the cleaning efficiency, shorten the production cycle, and when the second drain trough 9 is misaligned with the first drain trough 8, the first drain trough 8 of the base 7 is blocked by the sealing plate 12. When the second drain trough 9 is misaligned with the first drain trough 8, the sealing plate 12 blocks the first drain trough 8 of the base 7 to prevent sewage from overflowing or leaking from the first drain trough 8. This design can ensure that sewage will not flow out of the equipment during the cleaning process, avoiding environmental pollution and pollution in the workplace. By blocking the first drain trough 8, the sewage is effectively trapped inside the equipment, keeping the working environment clean and tidy. This helps to improve work efficiency and the work comfort of employees. The blocking of the sealing plate 12 can prevent sewage from eroding and corroding the base 7 and other equipment parts, extend the service life of the equipment, and reduce the cost of equipment maintenance and repair. The blocking of the sealing plate 12 ensures the safe progress of the cleaning process. Preventing the leakage of sewage reduces the risk of staff contact with harmful substances and improves the safety and reliability of operation.
[0061] A coke cleaning mechanism for coal-to-acetylene plasma reaction based on Example 1 is used:
[0062] The ultrasonic transducer 3 located on the fixed frame 4 adopts ultrasonic technology. By converting electrical energy into ultrasonic vibration energy, it can generate high-frequency, high-intensity sound waves. When these sound waves propagate inside the reactor, they will generate strong washing force, thoroughly cleaning the inner wall and corners of the reactor, removing coke and other deposits.
[0063] The flushing pipe 6 further enhances the cleaning effect. The flushing pipe 6 works in conjunction with the ultrasonic transducer 3 to flush the inner wall of the reactor with high-pressure water flow, effectively removing stubborn deposits that are difficult to remove and ensuring the cleanliness of the reactor interior.
[0064] The first sealing ring 2 and the second sealing ring 13 on the sealing plate 12 are arranged inside the base 7, and these sealing rings provide excellent sealing performance. They can effectively prevent the sewage and reaction products generated inside the reactor from leaking into the environment, ensuring the cleanliness and safety of the workplace.
[0065] When the first drain chute 8 is aligned with the second drain chute 9, the sewage is discharged smoothly. When they are misaligned, the sealing plate 12 blocks the first drain chute 8 to ensure that the sewage inside the reactor will not leak out, thereby ensuring the intelligent operation of the entire cleaning system.
[0066] The precise drainage system and sealing design can effectively prevent sewage leakage and reduce environmental pollution. In addition, the cleaning process uses ultrasonic and high-pressure water technology, which can save water resources, reduce energy consumption, and achieve environmental protection and energy saving compared to traditional cleaning methods.
[0067] In summary, the decoking mechanism provides a reliable solution for the cleaning of coal-to-acetylene plasma reactors through its design of efficient cleaning, excellent sealing performance, simple structure, stability and reliability, and environmental protection and energy saving. It also provides a safer and more environmentally friendly cleaning technology for industrial production.
[0068] The above description is only a preferred embodiment of the utility model and does not impose any form of limitation on the utility model. Any ordinary technician in the industry can smoothly implement the utility model as shown in the drawings of the specification and described above. However, any equivalent changes, modifications and evolutions made by technicians familiar with the profession without departing from the scope of the technical solution of the utility model using the technical content disclosed above are all equivalent embodiments of the utility model. At the same time, any equivalent changes, modifications and evolutions made to the above embodiments based on the essential technology of the utility model are still within the protection scope of the technical solution of the utility model.
Claims
1. A decoking mechanism for coal-to-acetylene plasma reaction, characterized in that: The invention comprises a support column (1), a fixing frame (4), a reaction container (5) and a base (7), wherein the outer side of the base (7) is provided with a support column (1), the inner side of the base (7) is provided with a first sealing ring (2), the bottom end of the base (7) is penetrated by a first sewage trough (8), the base (7) is provided with a fixing frame (4), the fixing frame (4) is inlaid with an ultrasonic transducer (3), the fixing frame (4) is provided with a flushing pipe (6), the base (7) is provided with a reaction container (5) on the outer side of the fixing frame (4), the bottom end of the flushing pipe (6) is connected with a connecting pipe (10), the outer side of one end of the flushing pipe (6) close to the connecting pipe (10) is provided with a support plate (11), the bottom end of the base (7) is supported by a sealing plate (12) through the supporting plate (11), and the first sewage trough (8) of the base (7) is blocked by the sealing plate (12).
2. The decoking mechanism for coal-to-acetylene plasma reaction according to claim 1, characterized in that: The ultrasonic transducers (3) are evenly distributed on the fixing frame (4).
3. The decoking mechanism for coal-to-acetylene plasma reaction according to claim 1, characterized in that: The reaction container (5) and the base (7) are sealed via a first sealing ring (2).
4. The decoking mechanism for coal-to-acetylene plasma reaction according to claim 1, characterized in that: The sealing plate (12) is provided with a second drainage groove (9) extending therethrough, and the second drainage groove (9) is matched with the first drainage groove (8) in position and size.
5. A decoking mechanism for coal-to-acetylene plasma reaction according to claim 4, characterized in that: When the second sewage discharge trough (9) is aligned with the first sewage discharge trough (8), sewage between the reaction container (5) and the ultrasonic transducer (3) is discharged through the first sewage discharge trough (8) and the second sewage discharge trough (9).
6. A decoking mechanism for coal-to-acetylene plasma reaction according to claim 4, characterized in that: When the second sewage discharge groove (9) is misaligned with the first sewage discharge groove (8), the first sewage discharge groove (8) of the base (7) is blocked by a sealing plate (12).
7. A decoking mechanism for coal-to-acetylene plasma reaction according to claim 1, characterized in that: The sealing plate (12) is provided with second sealing rings (13) on both sides of the second sewage trough (9), and the second sealing rings (13) increase the sealing performance between the base (7) and the sealing plate (12) to prevent sewage from leaking from the gap between the first sewage trough (8) and the second sewage trough (9).