A smoke filtering method using smoke drainage

Abstract

A smoke filtering method using smoke drainage includes: a smoke collecting box and a rotating plate, wherein the smoke collecting box is divided into a filter chamber and an adjustment chamber by a partition plate, and a fixed frame is fixedly connected to a fixed groove opened in the filter chamber by a mosaic plate, and a diversion groove is opened at the upper end of the fixed frame, and drainage grooves are symmetrically opened at the bottom of both sides of the diversion groove, and a filter screen is fixedly connected to the middle of the fixed frame, and the rotating plate is movably connected in the adjustment chamber, and the inner cavity of the rotating plate is connected to the inner cavity of the partition plate through a through hole, and the side of the rotating plate away from the partition plate is fixedly connected to the main rotating rod, and the main rotating rod is movably connected to the smoke collecting box through a bearing, and a storage groove is symmetrically opened on the side of the adjustment chamber, and a positioning block is slidably connected in the storage groove by a spring and a fixed rod. The present invention can enhance the filtering effect of the device on dust particles in smoke and reduce the probability of dust particles polluting the environment through the cooperation of the fixed frame, the filter screen, the drainage groove and the diversion groove.

Description

Technical Field

[0001] The invention relates to the technical field of flue gas treatment, and in particular to a flue gas filtering method utilizing flue gas drainage. Background Art

[0002] Circulating fluidized bed boilers use the cleanest coal combustion technology with the highest degree of industrialization; circulating fluidized bed boilers use fluidized combustion, and their main structures include two major parts: a combustion chamber (including a dense phase zone and a dilute phase zone) and a circulating furnace (including a high-temperature gas-solid separator and a return system); in the prior art, the flue gas generated by boiler combustion is generally mixed with a large amount of heat, and directly discharging it into the air will cause heat loss and energy loss.

[0003] After searching, a circulating fluidized bed boiler for effectively treating flue gas disclosed in the prior art (application number: CN201920297994.6) records that "the first connecting rod is connected to the first slider by a pin shaft, the first slider is slidably connected to a plurality of baffles, one end of the baffle is welded to the mounting plate, and the other end of the baffle is welded to the fixed plate, the first slider is located between the two baffles, the end of the first slider away from the rotating rod is welded to a breaker, the breaker is slidably connected to a crushing chamber, the crushing chamber is welded to the inner bottom wall of the crushing device body, and there are two connecting rods in total." The boiler is provided with a drainage pipe on the outside of the tail flue The flue gas is discharged through the drainage pipe, so the operator can process the end of the drainage pipe to achieve the recovery and reuse of the flue gas. However, the exhaust port of the boiler is always kept open during the flue gas recovery, which will cause the heat of the flue gas in the smoke box to be lost, and the flue gas discharged from the boiler is mixed with corresponding dust particles. The directly open exhaust port causes a large amount of flue gas to be dissipated to the outside, so that the solid particles will cause greater pollution to the external environment. At the same time, when the boiler is draining, it is necessary to open the sealing cover first, connect the corresponding equipment at the sealing cover, and then open the stop valve to discharge the flue gas from the drainage pipe to the corresponding equipment, which makes the actual operation process of the flue gas drainage more cumbersome and inconvenient. Summary of the invention

[0004] The purpose of the present invention is to solve the above-mentioned problems and provide a smoke filtering method using smoke drainage.

[0005] The above purpose is achieved through the following technical solutions: A smoke filtering method using smoke drainage, the method comprising the following steps: (1) When it is necessary to recover the flue gas, pull the fixed rod with the drainage label, and the fixed rod drives the corresponding positioning block to disengage from the positioning groove provided on the rotating plate, thereby releasing the restriction between the regulating chamber and the rotating plate; (2) When the main rotating rod drives the rotating plate to rotate 180 degrees, when the positioning groove is directly opposite to another set of positioning blocks, the positioning blocks are embedded in the positioning groove under the action of the compressed spring, thereby completing the fixed connection between the regulating chamber and the rotating plate, so that the air outlet opened on the side of the rotating plate is changed from being connected to the discharge pipe to being connected to the drainage pipe 8; (3) Afterwards, the smoke flows into the smoke collection box through the tail flue. During the flow of the smoke, it will be initially filtered by the filter to reduce the content of dust particles in the smoke; (4) At the same time, open the valve of the injection pipe, and the injection pipe will inject the filtered liquid into the diversion groove, and then spray it onto the surface of the filter screen through the drainage groove and the spray hole. The filtered liquid moves downward under the action of gravity, so that the filtered liquid is distributed on the surface of the filter screen, thereby helping to enhance the filtering effect of the filter screen on dust particles. In addition, the filtered liquid will flow into the confluence groove through the recovery hole, and then flow into the waste liquid tank through the confluence groove, which is convenient for subsequent recycling.

[0006] The smoke filtering method utilizing smoke drainage is described, the smoke collecting box is divided into a filter chamber and an adjusting chamber by a partition plate, and the fixed frame is fixedly connected to the fixed groove opened in the filter chamber by a mosaic plate, the upper end of the fixed frame is provided with a diversion groove, the bottoms of both sides of the diversion groove are symmetrically provided with drainage grooves, and the middle of the fixed frame is fixedly connected to the filter screen, and at the same time, the bottom of the inner side of the fixed frame is connected to the confluence groove through a recovery hole, the confluence groove is provided at the bottom of the fixed groove, and the confluence groove is connected to the waste liquid box, the waste liquid box is fixedly connected to the lower surface of the smoke collecting box, the rotating plate is movably connected in the adjusting chamber, the inner cavity of the rotating plate is connected to the inner cavity of the partition plate through a through hole, the side of the rotating plate away from the partition plate is fixedly connected to the main rotating rod, the main rotating rod is movably connected to the smoke collecting box through a bearing, and at the same time, the side of the adjusting chamber is symmetrically provided with receiving grooves, and the positioning block is slidably connected in the receiving groove through a spring and a fixed rod.

[0007] The smoke filtering method using smoke drainage is described, the smoke collecting box is an overall rectangular structure, the filter cavity opened in the smoke collecting box is a square structure, and the adjustment cavity is a cylindrical structure, and the top and bottom of the adjustment cavity are respectively connected to the smoke exhaust pipe and the drainage pipe, and at the same time, a fitting groove is opened on the side of the fixed groove corresponding to the position of the fitting plate.

[0008] The smoke filtering method using smoke drainage is described, the partition plate as a whole is a square outer and circular inner structure, the inner cavity of the partition plate is a truncated cone structure, and the sizes of the adjustment cavity and the rotating plate are adapted, and the rotating plate is a cylindrical structure, and the axial cross-section formed by the combination of the inner cavity of the rotating plate and the through-hole is a convex structure.

[0009] The smoke filtering method using smoke drainage is described, wherein a positioning groove is provided on the outer surface of the rotating plate corresponding to the position of the positioning block, the positioning groove is a square structure, and the positioning block is a rectangular structure. The cross-section formed by the combination of the positioning block and the fixing rod is a convex structure, and a spring is sleeved on the surface of the fixing rod.

[0010] The smoke filtering method using smoke drainage is described, the fixed frame is in a U-shaped structure, the filter screen fixedly connected to the fixed frame is in a square structure, and the bottom cross-section inside the fixed frame is in an isosceles trapezoidal structure, and at the same time, multiple groups of recovery holes are opened at parallel and equal intervals on both sides of the bottom of the fixed frame relative to the position of the filter screen, and the cross-section of the confluence trough connected to the recovery holes is in an isosceles trapezoidal structure.

[0011] The smoke filtering method using smoke drainage is described, the cross-section of the diverter groove opened at the upper end of the fixed frame is a convex-shaped structure, the two groups of drainage grooves opened at the bottom of the diverter groove are both long strip structures, the length of the drainage groove is greater than the length of the diverter groove, and the cross-section formed by the combination of the diverter groove and the drainage groove is a Y-shaped structure.

[0012] The smoke filtering method using smoke drainage is described, wherein a plurality of groups of liquid spray holes are arranged in parallel and at equal intervals at the bottom of the liquid drainage groove, the liquid spray holes are in a truncated cone-shaped structure, and the openings at the lower ends of the liquid spray holes are inclined toward one side of the filter screen, and at the same time, two groups of storage cavities are symmetrically arranged on both sides of the upper end of the fixed frame, the storage cavities are in a square structure, and the middle of the storage cavity is movably connected to the moving screw rod through a bearing, and the middle of the moving screw rod is connected to the auxiliary rotating rod through a bevel gear, the auxiliary rotating rod is movably connected to the upper surface of the fixed frame through a bearing, and two groups of interlocking plates are symmetrically screwed at both ends of the moving screw rod. Beneficial Effects

[0013] 1. The present invention cooperates with the cigarette collection box, the rotating plate, the main rotating rod, the positioning block, the fixing rod and the spring, so that the inner cavity of the rotating plate can close the smoke exhaust pipe while being connected to the drainage pipe, thereby preventing the heat loss of the smoke in the cigarette collection box, and the rotation of the rotating plate can also conveniently complete the operation of smoke drainage or smoke exhaust, thereby improving the convenience of smoke drainage adjustment. At the same time, through the cooperation of the diversion groove and the mixing drainage groove, the filtered liquid can flow on the surface of the filter screen, thereby helping to enhance the filtering effect of the filter screen on dust particles and reduce the pollution effect of dust particles on the environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a front view schematic diagram of an embodiment of the present invention; Figure 2 It is a left side schematic diagram of an embodiment of the present invention; Figure 3 It is a right side schematic diagram of an embodiment of the present invention; Figure 4 For the embodiment of the present invention Figure 1 A magnified schematic diagram of point A; In the figure: 1. tail flue; 2. smoke collecting box; 3. filter screen; 4. fixed frame; 5. waste liquid box; 6. confluence trough; 7. recovery hole; 8. drainage pipe; 9. rotating plate; 10. main rotating rod; 11. partition plate; 12. smoke exhaust pipe; 13. drainage trough; 14. movable screw rod; 15. auxiliary rotating rod; 16. diversion trough; 17. mosaic plate; 18. positioning block. DETAILED DESCRIPTION

[0015] Reference Figures 1 to 4 As shown, a smoke filtering method using smoke drainage comprises the following steps: (1) When it is necessary to recover the flue gas, pull the fixed rod with the drainage label, and the fixed rod drives the corresponding positioning block to disengage from the positioning groove provided on the rotating plate, thereby releasing the restriction between the regulating chamber and the rotating plate; (2) When the main rotating rod drives the rotating plate to rotate 180 degrees, when the positioning groove is directly opposite to another set of positioning blocks, the positioning blocks are embedded in the positioning groove under the action of the compressed spring, thereby completing the fixed connection between the regulating chamber and the rotating plate, so that the air outlet opened on the side of the rotating plate is changed from being connected to the discharge pipe to being connected to the drainage pipe 8; (3) Afterwards, the smoke flows into the smoke collection box through the tail flue. During the flow of the smoke, it will be initially filtered by the filter to reduce the content of dust particles in the smoke; (4) At the same time, open the valve of the injection pipe, and the injection pipe will inject the filtered liquid into the diversion groove, and then spray it onto the surface of the filter screen through the drainage groove and the spray hole. The filtered liquid moves downward under the action of gravity, so that the filtered liquid is distributed on the surface of the filter screen, thereby helping to enhance the filtering effect of the filter screen on dust particles. In addition, the filtered liquid will flow into the confluence groove through the recovery hole, and then flow into the waste liquid tank through the confluence groove, which is convenient for subsequent recycling.

[0016] The present invention provides a smoke filtering method using smoke drainage, comprising: a smoke collecting box 2 and a rotating plate 9, a tail flue 1 fixedly connected to one end of the smoke collecting box 2, and the other end of the smoke collecting box 2 is respectively fixedly connected to a drainage pipe 8 and a smoke exhaust pipe 12, the smoke collecting box 2 is divided into a filter chamber and an adjustment chamber by a partition plate 11, and a fixed frame 4 is fixedly connected to a fixed groove opened in the filter chamber by a mosaic plate 17, and a diversion groove 16 is opened at the upper end of the fixed frame 4, and drainage grooves 13 are symmetrically opened at the bottom of both sides of the diversion groove 16, and the middle of the fixed frame 4 is fixedly connected to a filter screen 3, and fixed at the same time The bottom of the inner side surface of the frame 4 is connected to the confluence trough 6 through the recovery hole 7. The confluence trough 6 is opened at the bottom of the fixed groove, and the confluence trough 6 is connected to the waste liquid box 5. The waste liquid box 5 is fixedly connected to the lower surface of the cigarette collection box 2. The rotating plate 9 is movably connected in the adjustment cavity. The inner cavity of the rotating plate 9 is connected to the inner cavity of the partition plate 11 through the through hole, and the side of the rotating plate 9 away from the partition plate 11 is fixedly connected to the main rotating rod 10. The main rotating rod 10 is movably connected to the cigarette collection box 2 through a bearing. At the same time, storage grooves are symmetrically opened on the side of the adjustment cavity, and the positioning block 18 is slidably connected in the storage groove through a spring and a fixed rod.

[0017] In this embodiment, when it is necessary to recover the smoke, the fixing rod with the drainage label is pulled, and the fixing rod drives the corresponding positioning block 18 to disengage from the positioning groove provided in the rotating plate 9, thereby releasing the restriction between the regulating chamber and the rotating plate 9, and the rotating plate 9 is driven by the main rotating rod 10 to rotate 180 degrees. When the positioning groove is directly opposite to another set of positioning blocks 18, the positioning block 18 is embedded in the positioning groove under the action of the compressed spring, thereby completing the fixed connection between the regulating chamber and the rotating plate 9, so that the air outlet provided on the side of the rotating plate 9 is changed from being connected to the drainage pipe to being connected to the drainage pipe 8. After that, the smoke passes through the tail The smoke duct 1 flows into the smoke collecting box 2, and in the process of smoke flow, it will be subjected to corresponding preliminary filtration by the filter 3 to reduce the content of dust particles in the smoke. At the same time, the valve of the injection pipe is opened, and the injection pipe injects the filtered liquid into the diversion groove 16, and then sprays it to the surface of the filter 3 through the drainage groove 13 and the spray hole, and the filtered liquid moves downward under the action of gravity, so that the surface of the filter 3 is distributed with the filtered liquid, thereby assisting in enhancing the filtering effect of the filter 3 on dust particles, and the filtered liquid will flow into the confluence groove 6 through the recovery hole 7, and then flow into the waste liquid tank 5 through the confluence groove 6, which is convenient for subsequent recycling.

[0018] As a preferred embodiment, the cigarette box 2 is an overall rectangular parallelepiped structure, the filter chamber opened in the cigarette box 2 is a square structure, and the adjustment chamber is a cylindrical structure, and the top and bottom of the adjustment chamber are respectively connected to the smoke exhaust pipe 12 and the drainage pipe 8, and at the same time, a fitting groove is opened on the side of the fixed groove corresponding to the position of the fitting plate 17.

[0019] In this embodiment, if Figure 1 and Figure 3The setting of the filter chamber and the adjustment chamber enables the cigarette collecting box 2 to perform corresponding preliminary filtration on the smoke and reduce the pollution effect of dust particles on the environment. At the same time, the setting of the engaging groove facilitates the fixing frame 4 to be fixedly connected to the cigarette collecting box 2 through the engaging plate 17.

[0020] As a preferred embodiment, the partition plate 11 is an overall square outer and circular inner structure, the inner cavity of the partition plate 11 is a truncated cone structure, and the sizes of the adjustment cavity and the rotating plate 9 are adapted. At the same time, the rotating plate 9 is a cylindrical structure, and the axial cross-section formed by the inner cavity of the rotating plate 9 and the through-hole is a convex structure.

[0021] In this embodiment, if Figure 1 and Figure 3 The structural setting of the inner cavity of the partition plate 11 can help guide the circulation of smoke, and the sizes of the regulating cavity and the rotating plate 9 are adapted to each other, which can help enhance the sealing of the connection between the regulating cavity and the rotating plate 9, and only one set of air outlets is opened on the side of the inner cavity of the rotating plate 9.

[0022] As a preferred embodiment, a positioning groove is provided on the outer surface of the rotating plate 9 corresponding to the position of the positioning block 18. The positioning groove has a square structure, and the positioning block 18 has a rectangular structure. The cross-section formed by the combination of the positioning block 18 and the fixing rod has a convex structure, and a spring is sleeved on the surface of the fixing rod.

[0023] In this embodiment, if Figure 1 and Figure 4 The end of the positioning block 18 away from the fixing rod is in a prism-shaped structure, which can assist the positioning block 18 to quickly embed into the positioning groove, and the two sets of fixing rods are respectively fixedly connected to the drainage label and the smoke exhaust label, so that workers can quickly determine the state of the cigarette collection box 2.

[0024] As a preferred embodiment, the fixed frame 4 has a U-shaped structure, the filter screen 3 fixedly connected to the fixed frame 4 has a square structure, and the bottom cross-section inside the fixed frame 4 has an isosceles trapezoidal structure. At the same time, multiple groups of recovery holes 7 are opened at parallel and equal intervals on both sides of the bottom of the fixed frame 4 relative to the position of the filter screen 3, and the cross-section of the confluence trough 6 connected to the recovery holes 7 has an isosceles trapezoidal structure.

[0025] In this embodiment, if Figure 1 and Figure 2 The groove at the bottom of the fixing frame 4 can prevent the filter screen 3 from overflowing to the bottom of the cigarette collecting box 2, ensuring that the filtered liquid can flow smoothly into the waste liquid box 5 through the recovery hole 7 and the confluence groove 6.

[0026] As a preferred embodiment, the diverter groove 16 opened at the upper end of the fixed frame 4 has a convex U-shaped structure in cross section, and the two groups of drainage grooves 13 opened at the bottom of the diverter groove 16 are both long strip structures. The length of the drainage groove 13 is greater than the length of the diverter groove 16. At the same time, the cross section formed by the combination of the diverter groove 16 and the drainage groove 13 is a Y-shaped structure.

[0027] In this embodiment, if Figure 1 and Figure 2 The cooperation between the diverter groove 16 and the drain groove 13 enables the filtered liquid to be sprayed out from both sides of the top of the fixed frame 4, so that the filtered liquid can flow on the surfaces of both sides of the filter screen 3, thereby helping to enhance the filtering effect of the filter screen 3 on dust particles.

[0028] As a preferred embodiment, a plurality of groups of liquid spray holes are provided at parallel and equidistant positions at the bottom of the liquid drainage groove 13. The liquid spray holes are in a truncated cone-shaped structure, and the openings at the lower ends of the liquid spray holes are inclined toward one side of the filter screen 3. At the same time, two groups of storage chambers are symmetrically provided on both sides of the upper end of the fixed frame 4. The storage chambers are in a square structure, and the middle of the storage chamber is movably connected to the movable screw rod 14 through a bearing, and the middle of the movable screw rod 14 is connected to the auxiliary rotating rod 15 through a bevel gear, and the auxiliary rotating rod 15 is movably connected to the upper surface of the fixed frame 4 through a bearing, and two groups of interlocking plates 17 are symmetrically screwed at both ends of the movable screw rod 14.

[0029] In this embodiment, if Figure 1 and Figure 2 The structure of the liquid spray hole allows the filtered liquid to fall smoothly on the surface of the filter screen 3, and the auxiliary rotating rod 15 is rotated, and the auxiliary rotating rod 15 drives the moving screw rod 14 to rotate synchronously through the bevel gear, and then the moving screw rod 14 can push the two sets of screw-connected engaging plates 17 to move relative or opposite to each other, which is convenient for the change of the connection state between the cigarette receiving box 2 and the fixed frame 4, and then facilitates the subsequent corresponding processing of the filter screen 3.

[0030] The circulating fluidized bed boiler flue gas treatment equipment of the present invention can enhance the filtering effect of the equipment on dust particles in the flue gas and reduce the probability of dust particles polluting the environment through the cooperation of the fixed frame 4, the filter screen 3, the drainage trough 13 and the diversion trough 16, and the smoke collecting box 2 can be conveniently adjusted for drainage through the cooperation of the partition plate 11, the rotating plate 9, the main rotating rod 10, the fixed rod, the positioning block 18 and the spring, thereby improving the convenience of smoke drainage adjustment.

Claims

1. A smoke filtering method using smoke drainage, characterized in that: The method comprises the following steps: (1) When it is necessary to recover the flue gas, pull the fixed rod with the drainage label, and the fixed rod drives the corresponding positioning block to disengage from the positioning groove provided on the rotating plate, thereby releasing the restriction between the regulating chamber and the rotating plate; (2) When the main rotating rod drives the rotating plate to rotate 180 degrees, when the positioning groove is directly opposite to another set of positioning blocks, the positioning blocks are embedded in the positioning groove under the action of the compressed spring, thereby completing the fixed connection between the regulating chamber and the rotating plate, so that the air outlet opened on the side of the rotating plate is changed from being connected to the discharge pipe to being connected to the drainage pipe 8; (3) Afterwards, the smoke flows into the smoke collection box through the tail flue. During the flow of the smoke, it will be initially filtered by the filter to reduce the content of dust particles in the smoke; (4) At the same time, open the valve of the injection pipe, and the injection pipe will inject the filtered liquid into the diversion groove, and then spray it onto the surface of the filter screen through the drainage groove and the spray hole. The filtered liquid moves downward under the action of gravity, so that the filtered liquid is distributed on the surface of the filter screen, thereby helping to enhance the filtering effect of the filter screen on dust particles. In addition, the filtered liquid will flow into the confluence groove through the recovery hole, and then flow into the waste liquid tank through the confluence groove, which is convenient for subsequent recycling.

2. A smoke filtration method using smoke drainage according to claim 1, characterized in that: The cigarette collection box is divided into a filter chamber and an adjustment chamber by a partition plate, and the fixed frame is fixedly connected to the fixed groove opened in the filter chamber by a mosaic plate, a diversion groove is opened at the upper end of the fixed frame, and drainage grooves are symmetrically opened at the bottom of both sides of the diversion groove, and the middle of the fixed frame is fixedly connected to the filter screen, and at the same time, the bottom of the inner side of the fixed frame is connected to the confluence groove through a recovery hole, the confluence groove is opened at the bottom of the fixed groove, and the confluence groove is connected to the waste liquid box, and the waste liquid box is fixedly connected to the lower surface of the cigarette collection box, the rotating plate is movably connected in the adjustment chamber, and the inner cavity of the rotating plate is connected to the inner cavity of the partition plate through a through hole, the side of the rotating plate away from the partition plate is fixedly connected to the main rotating rod, and the main rotating rod is movably connected to the cigarette collection box through a bearing, and at the same time, the side of the adjustment chamber is symmetrically opened with a receiving groove, and the positioning block is slidably connected in the receiving groove through a spring and a fixed rod.

3. A smoke filtering method using smoke drainage according to claim 2, characterized in that: The cigarette box is a rectangular parallelepiped structure as a whole, the filter cavity opened in the cigarette box is a square structure, and the adjustment cavity is a cylindrical structure. The top and bottom of the adjustment cavity are respectively connected to the smoke exhaust pipe and the drainage pipe, and a fitting groove is opened on the side of the fixed groove corresponding to the position of the fitting plate.

4. The smoke filtering method using smoke drainage according to claim 2, characterized in that: The partition plate is generally square outside and circular inside, the inner cavity of the partition plate is a truncated cone structure, and the sizes of the adjustment cavity and the rotating plate are adapted. At the same time, the rotating plate is a cylindrical structure, and the axial section formed by the inner cavity of the rotating plate and the through-hole is a convex structure.

5. The smoke filtering method using smoke drainage according to claim 2, characterized in that: A positioning groove is provided on the outer surface of the rotating plate corresponding to the position of the positioning block. The positioning groove is square in structure, and the positioning block is rectangular in structure. The cross section formed by the positioning block and the fixing rod is convex in shape, and a spring is sleeved on the surface of the fixing rod.

6. The smoke filtering method using smoke drainage according to claim 2, characterized in that: The fixed frame is in the shape of a U, the filter screen fixedly connected to the fixed frame is in a square structure, and the bottom cross-section inside the fixed frame is in an isosceles trapezoidal structure. At the same time, multiple groups of recovery holes are arranged at parallel and equal intervals on both sides of the bottom of the fixed frame relative to the position of the filter screen, and the cross-section of the confluence trough connected to the recovery holes is in an isosceles trapezoidal structure.

7. The smoke filtering method using smoke drainage according to claim 2, characterized in that: The cross-section of the diversion groove opened at the upper end of the fixed frame is a convex structure, and the two groups of drainage grooves opened at the bottom of the diversion groove are both long strip structures. The length of the drainage groove is greater than the length of the diversion groove. At the same time, the cross-section formed by the combination of the diversion groove and the drainage groove is a Y-shaped structure.

8. The method for filtering smoke using smoke drainage according to claim 2, characterized in that: The bottom of the drainage trough is provided with a plurality of groups of spray holes at equal intervals in parallel, the spray holes are in a truncated cone-shaped structure, and the openings at the lower ends of the spray holes are inclined toward one side of the filter screen. At the same time, two groups of storage chambers are symmetrically provided on both sides of the upper end of the fixed frame, the storage chambers are in a square structure, and the middle of the storage chamber is movably connected to the moving screw rod through a bearing, and the middle of the moving screw rod is connected to the auxiliary rotating rod through a bevel gear, the auxiliary rotating rod is movably connected to the upper surface of the fixed frame through a bearing, and two groups of interlocking plates are symmetrically screwed at both ends of the moving screw rod.

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