Sedimentation tank structure and method for ripening regulation factory

Abstract

The invention relates to the technical field of settling ponds of mature regulation factories, and discloses a settling pond structure and method for a mature regulation factory, the settling pond structure comprises multiple stages of settling ponds and a pump pond which are arranged in sequence, and the multiple stages of settling ponds and the pump pond are communicated through holes in sequence; a lifting flashboard is arranged at the first hole between the primary sedimentation tank and the secondary sedimentation tank, and the lifting flashboard is lifted through a driving mechanism outside the sedimentation tank, so that the first hole is opened and closed by the lifting flashboard; a three-way overflow pipeline is arranged at a downstream hole of the first hole to realize communication between the upper-stage sedimentation tank and the lower-stage sedimentation tank; a blocking material is arranged between the outer side of the three-way overflow pipeline and the corresponding hole; the lower end orifice of the three-way overflow pipeline is lower than the bottom edge of the corresponding hole; according to the modified settling pond for the ripening regulation factory, through the cooperation of the lifting flashboard and the three-way overflow pipeline, on one hand, the settling effect of an original settling pond can be improved, and the effluent quality is improved; and on the other hand, the sedimentation tank can be cleaned in different areas as required.

Description

Technical Field

[0001] The present invention relates to the technical field of sedimentation tanks in cooking factories, and in particular to a structure and method for sedimentation tanks in cooking factories. Background Art

[0002] The sedimentation tank in the cooking factory mainly contains a wastewater mixture of waste slurry, flour, edible oil, etc. The workshop continuously discharges the wastewater containing the mixture into the first-stage sedimentation tank through a sleeve. The wastewater precipitates in the multi-stage sedimentation tank and forms a thick suspension layer and a lower sediment after sedimentation and fermentation in the tank. The sedimentation tanks at all levels are connected through holes opened at the bottom of the side walls. After the wastewater undergoes multi-stage sedimentation, it overflows into the final pump tank and can then be transported to the sewage treatment plant for further sewage treatment.

[0003] The inventor found that the hole sizes opened in the partition walls of the current sedimentation tanks at all levels are relatively large. If the water level in the sedimentation tank drops and the height of the suspended matter drops to the top position of the hole, the suspended matter can directly enter the lower-level sedimentation tank through the hole, resulting in a large amount of suspended matter sediment entering the lower-level sedimentation tank, reducing the partition sedimentation effect of the sedimentation tanks at all levels, and often causing the exceedance of COD, BOD, and ammonia nitrogen. In addition, since the sedimentation tanks at all levels are interconnected, when it is necessary to clean the sedimentation tank, it is impossible to clean it flexibly according to the dirt and blockage conditions of each sewage tank. If it is necessary to thoroughly clean the sewage tank, it is necessary to coordinate the entire production suspension of the workshop, delaying the work progress of the workshop and causing additional economic losses. Summary of the Invention

[0004] Aiming at the deficiencies of the existing technology, the purpose of the present invention is to provide a structure and method for sedimentation tanks in cooking factories. The reformed sedimentation tank in the cooking factory, through the cooperation of the lifting gate and the three-way overflow pipe, can, on the one hand, improve the sedimentation effect of the original sedimentation tank and improve the effluent quality; on the other hand, it can clean the sedimentation tank in zones as needed.

[0005] To achieve the above purpose, the present invention is realized through the following technical solutions:

[0006] In the first aspect, a structure for a sedimentation tank in a cooking factory includes a multi-stage sedimentation tank and a pump tank arranged in sequence, and the multi-stage sedimentation tank and the pump tank are connected through holes in sequence; a lifting gate is arranged at the first hole between the first-stage sedimentation tank and the second-stage sedimentation tank, and the lifting gate is lifted and lowered through a driving mechanism outside the sedimentation tank to open and close the first hole; a three-way overflow pipe is arranged at the hole downstream of the first hole to connect the upper-level sedimentation tank and the lower-level sedimentation tank; a sealing material is arranged between the outside of the three-way overflow pipe and the corresponding hole; the lower end pipe orifice of the three-way overflow pipe is lower than the bottom edge of the corresponding hole.

[0007] As a further implementation method, the pump tank is arranged inside the last-stage sedimentation tank.

[0008] As a further implementation manner, the three-way overflow pipe includes a vertical pipe and a horizontal pipe with one end connected to the middle position of the vertical pipe and perpendicular to the vertical pipe, and the bottom end of the vertical pipe is lower than the bottom edge of the hole.

[0009] As a further implementation manner, the horizontal pipe penetrates the hole downstream of the first hole, and the sealing material is arranged between the horizontal pipe and the hole.

[0010] As a further implementation manner, an airbag is further included. The airbag is provided with an inflation interface and is used to be placed in the three-way overflow pipe and block the connection position between the horizontal pipe and the vertical pipe.

[0011] As a further implementation manner, channel steels are arranged on the wall of the sedimentation tank, and the top end of the vertical pipe is fixed through a clamp structure, and both ends of the clamp are fixed to the channel steels.

[0012] As a further implementation manner, the holes arranged between the multi-stage sedimentation tanks are staggered to extend the flow path of the wastewater.

[0013] As a further implementation manner, openings are arranged at the top of each stage of sedimentation tank and the pump tank, and covers are arranged at the openings; the top end of the lifting gate is connected to a rack, and the top end of the rack passes through the cover and is connected to a driving mechanism at the top of the sedimentation tank, and the driving mechanism drives the rack to lift to realize the lifting of the lifting gate.

[0014] As a further implementation manner, tracks are arranged on both sides of the first hole, the two side edges of the lifting gate are matched with the tracks through sliders, and a rubber pad is arranged on one side of the lifting gate close to the first hole. The area of the rubber pad is larger than the area of the first hole, and the edge of the rubber pad is in an arc transition.

[0015] In the second aspect, a method for reforming the structure of a sedimentation tank in a cooking factory is characterized by including the following steps:

[0016] On the basis of the original sedimentation tank, tracks are arranged on both sides of the first hole between the first-stage sedimentation tank and the second-stage sedimentation tank. A lifting gate with a rubber pad on one side is slidably matched with the tracks through sliders. The top of the lifting gate is fixedly connected to a rack. The rack is extended above the opening of the first-stage sedimentation tank, and the rack is connected to a worm and rack driving mechanism; the horizontal pipe of the three-way overflow pipe is placed at the hole downstream of the first hole, and the space between the horizontal pipe and the corresponding hole is blocked by using a sealing material, so that the bottom end of the vertical pipe is lower than the bottom edge of the original hole, and the top end of the vertical pipe is higher than the top edge of the original hole; when it is necessary to clean the downstream sedimentation tank, the lifting gate can be lowered to close the first hole; the three-way overflow pipe can be blocked by using an airbag to clean the corresponding-stage sedimentation tank.

[0017] The beneficial effects of the present invention are as follows:

[0018] 1. The present invention prevents the sewage in the primary sedimentation tank from overflowing into the downstream sedimentation tank by setting up a lifting gate, which can achieve sectional cleaning. At the same time, the holes in the downstream sedimentation tank are blocked and an overflow tee pipe is installed, so that the sewage in the sedimentation tank can always be discharged in the middle clear water area, avoiding the upper suspended matter and the lower sediment from entering the next-level tank. By installing an airbag at the tee overflow pipe for blocking, flexible cleaning can be carried out according to the dirt blockage conditions of each sedimentation tank.

[0019] 2. The present invention installs a tee overflow pipe, changing the sewage flow channel from the original large vertical hole to a small horizontal pipe orifice. The wastewater in the middle clear water area enters from the bottom orifice of the vertical pipe, reaches the horizontal pipe upward, and then is discharged into the next-level sedimentation tank. The tee overflow pipe can block most of the suspended matter and sediment from entering the next-level sedimentation tank. And because the bottom orifice of the tee overflow pipe is lower than the bottom edge of the original hole, when the water level drops, the suspended matter will not directly enter the next-level sedimentation tank.

[0020] 3. The transformed sedimentation tank of the cooking factory in the present invention, through the cooperation of the lifting gate and the tee overflow pipe, on the one hand, can improve the sedimentation effect of the original sedimentation tank and improve the effluent quality; on the other hand, the sedimentation tank can be cleaned sectionally as needed. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The schematic diagrams of the specification forming a part of the present invention are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention.

[0022] Figure 1 It is a top view of the structure of the sedimentation tank of the cooking factory in the embodiment of the present invention;

[0023] Figure 2 It is a front sectional view of the structure of the sedimentation tank of the cooking factory in the embodiment of the present invention;

[0024] Figure 3 It is a schematic diagram of the structure of the driving mechanism in the embodiment of the present invention;

[0025] Figure 4 It is a schematic diagram of the installation position of the tee pipe in the embodiment of the present invention;

[0026] Figure 5 It is a schematic diagram of the structure of the gate in the embodiment of the present invention;

[0027] Figure 6 It is a schematic diagram of the structure of the cooperation between the gate and the track in the embodiment of the present invention.

[0028] In the figure: The distances or sizes between each part are exaggerated for showing the positions of each part, and the schematic diagrams are only for illustration.

[0029] Among them: 1. Primary sedimentation tank, 2. Secondary sedimentation tank, 3. Tertiary sedimentation tank, 4. Quaternary sedimentation tank, 5. Quinary sedimentation tank; 6. Pump sump, 7. Three-way overflow pipe, 9. Cover plate, 10. Airbag; 11. Primary hole; 12. First sleeve installation port; 121. First hole, 231. Second hole, 341. Third hole, 451. Fourth hole; 63. Fifth hole; 61. Overflow hole; 62. Second sleeve installation port; 71. Channel steel, 72. Expansion bolt, 73. Clamp, 74. Wall; 8. Lifting sluice gate, 81. Worm and rack drive mechanism, 82. Rack, 811. Housing, 812. Worm gear, 813. Worm, 814. Handle, 815. Bearing; 83. Rubber gasket; 84. Slide block, 122. Track. Detailed implementation manners

[0030] It should be noted that the following detailed descriptions are all illustrative and are intended to provide further explanations of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by those of ordinary skill in the technical field to which the present invention belongs.

[0031] In the existing multi-stage sedimentation tanks, they are connected through holes to achieve multi-stage sedimentation of wastewater. The wastewater in the last-stage sedimentation tank overflows into the pump sump, and the wastewater in the pump sump is discharged to the sewage treatment plant. However, due to the relatively large sizes of the holes opened in the partition walls of the current sedimentation tanks at all levels, when the water level in the sedimentation tank decreases and the height of the suspended matter drops to the position of the top of the hole, the suspended matter can directly enter the lower-stage sedimentation tank through the hole, resulting in poor sedimentation effect. In addition, since the sedimentation tanks at all levels are interconnected, when it is necessary to clean the sedimentation tanks, it is impossible to clean them flexibly according to the dirt and blockage conditions of the sedimentation tanks at all levels. If it is necessary to thoroughly clean the sedimentation tanks, it is necessary to coordinate the full shutdown of the workshop, which delays the work progress of the workshop. Therefore, it is necessary to transform the current sedimentation tanks.

[0032] Embodiment 1

[0033] In a typical implementation manner of the present invention, referring to Figures 1 - 6 as shown, a sedimentation tank structure of a cooking factory includes multi-stage sedimentation tanks and a pump sump 6 arranged in sequence, and the multi-stage sedimentation tanks and the pump sump 6 are connected through holes in sequence; a lifting sluice gate 8 is arranged at the first hole 121 between the primary sedimentation tank 1 and the secondary sedimentation tank 2, and the lifting sluice gate 8 is lifted and lowered through a driving mechanism outside the sedimentation tank to open and close the first hole by the lifting sluice gate 8; a three-way overflow pipe 7 is arranged at the hole downstream of the first hole 121 to connect the upper-stage sedimentation tank and the lower-stage sedimentation tank; a sealing material is arranged between the outer side of the three-way overflow pipe 7 and the corresponding hole; the lower end pipe orifice of the three-way overflow pipe 7 is lower than the bottom edge of the corresponding hole.

[0034] The multi-stage sedimentation tank of this embodiment includes a total of five stages, namely the first-stage sedimentation tank 1, the second-stage sedimentation tank 2, the third-stage sedimentation tank 3, the fourth-stage sedimentation tank 4, and the fifth-stage sedimentation tank 5, and also includes a group of pump tanks 6. Among them, each stage of sedimentation tank includes two tanks, and the multi-stage sedimentation tanks are arranged in the same row; the two tanks of each stage of sedimentation tank are arranged in the same column, as Figure 1 shown, divided into two rows and five columns, and the pump tank 6 is arranged inside the fifth-stage sedimentation tank and located between the two tanks.

[0035] The two tanks of the first-stage sedimentation tank 1 are connected through two first-stage holes 11 on the wall 74, and the two first-stage holes 11 are arranged on both sides of the wall. The sedimentation tanks of the same stage downstream of the first-stage sedimentation tank are connected, so that each first-stage sedimentation tank 1 and the downstream sedimentation tank form two groups of multi-stage sedimentation tanks.

[0036] The wall between the first-stage sedimentation tank 1 and the second-stage sedimentation tank 2 is connected by setting a first hole 121; the wall between the second-stage sedimentation tank 2 and the third-stage sedimentation tank 3 is connected by setting a second hole 231; the wall between the third-stage sedimentation tank 3 and the fourth-stage sedimentation tank 4 is connected by setting a third hole 341; the wall between the fourth-stage sedimentation tank 4 and the fifth-stage sedimentation tank 5 is connected by setting a fourth hole 451; the wall between the fifth-stage sedimentation tank 5 and the pump tank 6 is connected by setting a fifth hole 63.

[0037] As Figure 1 shown, in the sedimentation tanks of two rows and five columns, the holes set between the multi-stage sedimentation tanks are arranged staggeredly to extend the flow path of the wastewater and enhance the sedimentation effect of the sedimentation tank.

[0038] The top side wall of the first-stage sedimentation tank 1 is provided with a first sleeve installation port 12. After installing the first sleeve, the wastewater is conveyed from the workshop to the first-stage sedimentation tank through the first sleeve. The rear side wall of the pump tank 6 is provided with a second sleeve installation port 62, and the second sleeve is installed to drain the wastewater away. An opening is provided at the top of each tank, and a cover plate 9 is provided at the opening, and the cover plate 9 can be opened.

[0039] In this embodiment, a lifting gate 8 is provided on the wall of the first-stage sedimentation tank 1 provided with the first hole 121. The size of the lifting gate 8 is larger than that of the first hole 121, and the lifting of the lifting gate 8 can open or close the first hole 121.

[0040] In this embodiment, a three-way overflow pipe 7 is provided on the upstream side of the wall provided with the second hole, the third hole, the fourth hole, and the fifth hole.

[0041] As Figure 2 shown, the three-way overflow pipe 7 includes a vertical pipe and a horizontal pipe connected to the middle position of the vertical pipe and perpendicular to the vertical pipe, wherein the bottom end of the vertical pipe is lower than the bottom edge of the corresponding hole.

[0042] Specifically, the horizontal pipe of the three-way overflow pipe 7 penetrates through the holes provided downstream of the first hole, that is, the horizontal pipes of the three-way overflow pipe 7 penetrate through the second hole 231, the third hole 341, the fourth hole 451, and the fifth hole 63 respectively. In order to reduce the size of these holes and achieve sealing, a sealing material is provided between the horizontal pipe and the corresponding holes, and the sealing material is cement.

[0043] As Figure 4 shown, a channel steel 71 is provided on the upstream side of the wall where the three-way overflow pipe 7 is installed. The channel steel 71 is horizontally fixed to the wall with expansion bolts 72. The top end of the vertical pipe is fixed through a clamp 73 structure. Both ends of the clamp are fixed to the channel steel 71 through connecting parts such as wire, so as to fix the three-way overflow pipe 7 through the clamp. This prevents the three-way overflow pipe 7 from shifting and other situations. It can be understood that the height of the channel steel 71 is higher than the height of the corresponding holes.

[0044] When it is necessary to block the three-way overflow pipe 7, an airbag can be placed inside the three-way overflow pipe 7. The airbag is provided with an inflation interface. The airbag is used to be placed inside the three-way overflow pipe and block the connection position between the horizontal pipe and the vertical pipe. By setting the airbag 10 for sealing, the connection between the upstream and downstream sedimentation tanks can be cut off, which is convenient for cleaning the corresponding sedimentation tank.

[0045] The top end of the lifting gate 8 is connected to a rack 82. The top end of the rack 82 passes through the cover plate 9 and is connected to a driving mechanism provided at the top of the sedimentation tank. The driving mechanism adopts a worm and rack driving mechanism 81.

[0046] As Figure 3 shown, a housing 811 is provided at the top position between the primary sedimentation tank 1 and the secondary sedimentation tank 2. A worm gear 812 is fixed inside the housing through a support shaft. The housing 811 is provided with a channel for the vertical sliding of the rack 82. The top end of the rack 82 slides at this channel and cooperates with the worm gear 812. A set of worm shafts 813 that cooperate with the worm gear 812 are horizontally provided at the bottom of the worm gear 812. The outer end of the worm shaft 813 extends outside the housing 811 and a handle 814 is installed. Between the worm shaft 813 and the housing 811, as well as between the worm shaft 813 and the internal support structure of the housing 811, they are all cooperated through bearings 815. By turning the handle 814, the rotation of the worm shaft 813 can be realized, and then the worm shaft 813 drives the worm gear 812 to rotate. The worm gear 812 drives the rack 82 to rise and fall, realizing the rise and fall of the lifting gate 8, and finally realizing the opening and closing of the first hole 121.

[0047] As Figure 6 shown, tracks 122 are vertically provided on both sides of the first hole 121. The two side edges of the lifting gate slide and cooperate with the tracks 122 through sliders 84. A rubber pad 83 is provided on one side of the lifting gate 8 close to the first hole 121. The area of the rubber pad 83 is larger than the area of the first hole 121. The lifting gate 8 presses the rubber pad 83 tightly against the wall. When the first hole 121 is closed, the rubber pad 83 can achieve sealing.

[0048] As Figure 5 shown, the edge of the rubber pad 83 has an arc transition to ensure that the lifting gate 8 can be lifted and lowered smoothly when passing through the first hole, and the lifting gate 8 will not be stuck by the edge of the hole.

[0049] It can be understood that the lifting method of the lifting gate 8 in this embodiment is not limited to the worm and rack drive mechanism, and can be any drive mechanism that can control the lifting and lowering of the lifting gate 8.

[0050] As Figure 1 and Figure 2 shown, since the original overflow holes 61 on both sides of the pump pool 6 are relatively low in height, there is a risk of suspended matter entering. The overflow holes 61 are blocked, and a fifth hole 63 with a higher height is newly opened, and a three-way overflow pipe 7 is arranged at the fifth hole 63.

[0051] The heights of the first hole 121, the second hole 231, the third hole 341, the fourth hole 451, and the fifth hole 63 in this embodiment increase in sequence.

[0052] In this embodiment, by arranging a lifting gate 8 at the first hole 121 between the primary sedimentation tank 1 and the secondary sedimentation tank 2, closing the lifting gate 8 can prevent the sewage in the primary sedimentation tank 1 from overflowing to the downstream sedimentation tank, and partition cleaning can be realized; at the same time, the holes in the downstream sedimentation tank are blocked and a three-way overflow pipe is installed, so that the sewage in the sedimentation tank can always be discharged in the middle clear water area, avoiding the upper suspended matter and the lower sediment from entering the lower-level tank, and all indicators are lower than the requirements of the sewage treatment plant. By installing an airbag at the three-way overflow pipe for blocking, flexible cleaning can be carried out according to the dirt blockage conditions of each sedimentation tank. This embodiment can be used for sewage filtration and treatment in the sedimentation tank of a cooking factory.

[0053] As Figure 2 shown, by blocking and installing a three-way overflow pipe 7 at the hole between the sedimentation tanks, the sewage flow channel changes from the original large vertical hole to a small horizontal pipe orifice. The wastewater in the middle clear water area enters from the bottom orifice of the vertical pipe, reaches the horizontal pipe upward, and then is discharged to the next-level sedimentation tank. The three-way overflow pipe 7 can block most of the suspended matter and sediment from entering the next-level sedimentation tank. And because the bottom orifice of the three-way overflow pipe 7 is lower than the bottom edge of the original hole, when the water level drops, the suspended matter will not directly enter the next-level sedimentation tank.

[0054] In a second aspect, in a typical implementation manner of the present invention, referring to Figures 1 - 6 shown, a method for transforming the structure of a sedimentation tank in a cooking factory includes the following steps:

[0055] On the basis of the original sedimentation tank, tracks are arranged on both sides of the first hole between the primary sedimentation tank and the secondary sedimentation tank. A lifting gate plate with a rubber pad on one side is installed in sliding fit through a slider and the track. The top of the lifting gate plate is fixedly connected to a rack, the rack extends above the opening of the primary sedimentation tank, and the rack is connected to a worm and rack drive mechanism. Through the worm and rack drive mechanism, the rack can drive the lifting gate plate to slide up and down along the track, so as to realize the opening and closing control of the first hole.

[0056] Place the horizontal pipe of the three-way overflow pipe at the hole downstream of the first hole 121, and use the sealing material to seal the space between the horizontal pipe and the corresponding hole, so that the bottom end of the vertical pipe is lower than the bottom edge of the original hole, and the top end of the vertical pipe is higher than the top edge of the original hole; when it is necessary to clean the downstream sedimentation tank, the lifting gate plate can be lowered to close the first hole; the three-way overflow pipe can be sealed by filling the air bag at the three-way overflow pipe to clean the sedimentation tank of the corresponding stage.

[0057] For the renovated sedimentation tank of the cooking factory, through the cooperation of the lifting gate plate and the three-way overflow pipe, on the one hand, the sedimentation effect of the original sedimentation tank can be improved and the effluent quality can be improved; on the other hand, the sedimentation tank can be cleaned in zones as needed.

[0058] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A sedimentation tank structure for a cooking plant, characterized in that: It includes a multi-stage sedimentation tank and a pump tank arranged in sequence, and the multi-stage sedimentation tank and the pump tank are connected through holes in sequence; a lifting gate is arranged at the first hole between the primary sedimentation tank and the secondary sedimentation tank, and the lifting gate is lifted and lowered by a driving mechanism outside the sedimentation tank to open and close the first hole; a three-way overflow pipe is arranged at the hole downstream of the first hole to connect the upper sedimentation tank with the lower sedimentation tank; a plugging material is arranged between the outer side of the three-way overflow pipe and the corresponding hole; the lower end of the three-way overflow pipe is lower than the bottom edge of the corresponding hole.

2. A sedimentation tank structure for a cooking plant according to claim 1, characterized in that: The pump pool is arranged inside the last-stage sedimentation tank.

3. A sedimentation tank structure for a cooking plant according to claim 1, characterized in that: The three-way overflow pipeline comprises a vertical pipe and a horizontal pipe whose one end is connected to the middle position of the vertical pipe and is perpendicular to the vertical pipe. The bottom end of the vertical pipe is lower than the bottom edge of the hole.

4. A sedimentation tank structure for a cooking plant according to claim 3, characterized in that: The cross pipe passes through the hole downstream of the first hole, and the plugging material is arranged between the cross pipe and the hole.

5. A sedimentation tank structure for a cooking plant according to claim 4, characterized in that: It also includes an air bag, which is provided with an inflation interface. The air bag is used to be placed in a three-way overflow pipe and block the connecting position between the horizontal pipe and the vertical pipe.

6. A sedimentation tank structure for a cooking plant according to claim 4, characterized in that: Channel steel is arranged on the wall of the sedimentation tank, the top end of the vertical pipe is fixed by a clamp structure, and the two ends of the clamp are fixed to the channel steel.

7. The sedimentation tank structure of a cooking plant according to claim 1, characterized in that: The holes between the multi-stage sedimentation tanks are arranged in a staggered manner to extend the flow path of the wastewater.

8. A sedimentation tank structure for a cooking plant according to claim 7, characterized in that: An opening is arranged at the top of each sedimentation tank and pump tank, and a cover plate is arranged at the opening; the top of the lifting gate plate is connected to a rack, and the top of the rack passes through the cover plate to be connected to a driving mechanism at the top of the sedimentation tank, and the driving mechanism drives the rack to rise and fall to realize the lifting and falling of the lifting gate plate.

9. A sedimentation tank structure for a cooking plant according to claim 8, characterized in that: Tracks are arranged on both sides of the first hole, and both sides of the lifting gate cooperate with the tracks through sliders. A rubber pad is arranged on the side of the lifting gate close to the first hole, the area of ​​the rubber pad is larger than the area of ​​the first hole, and the edge of the rubber pad has an arc transition.

10. A method for modifying the sedimentation tank structure of a cooking plant, characterized in that: The steps include: On the basis of the original sedimentation tank, tracks are set on both sides of the first hole between the primary sedimentation tank and the secondary sedimentation tank, a lifting gate with a rubber pad on one side is slidably matched with the track through a slider, and a rack is fixedly connected to the top of the lifting gate, which is extended to the top of the opening of the primary sedimentation tank, and the rack is connected to the worm gear rack driving mechanism; a horizontal pipe of a three-way overflow pipe is placed at the hole downstream of the first hole, and the space between the horizontal pipe and the corresponding hole is blocked by a blocking material, so that the bottom end of the vertical pipe is lower than the bottom edge of the original hole, and the top end of the vertical pipe is higher than the top edge of the original hole; when it is necessary to clean the downstream sedimentation tank, the lifting gate can be lowered to close the first hole; the three-way overflow pipe can be blocked by an air bag to clean the sedimentation tank of the corresponding level.

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