Wastewater treatment equipment for propylene oxide production

Abstract

This invention discloses a wastewater treatment device for propylene oxide production, belonging to the field of wastewater treatment technology. It includes a pretreatment tank with an adjustment mechanism at one end, a drive mechanism at one end, a collection mechanism on the drive mechanism, and a filter cloth replacement mechanism on the adjustment mechanism. The invention uses a clamping assembly to hold a first connecting assembly, allowing a second sleeve rod and a lifting column to move relative to each other. This allows the filter cloth to move with the clamping assembly. The lifting assembly drives the clamping assembly and the filter cloth to move up and down, adjusting the filter cloth height according to the wastewater level, improving operational convenience and automation. When replacing the filter cloth, the lifting assembly moves the collection mechanism upwards, and the filter cloth replacement mechanism clamps the positioning block and pushes it outwards from the pretreatment tank, facilitating replacement by operators.

Description

Technical Field

[0001] This invention belongs to the field of wastewater treatment technology, and in particular relates to a wastewater treatment device for the production of propylene oxide. Background Technology

[0002] Propylene oxide is an organic compound, a colorless liquid with a pungent odor at room temperature. It is primarily used in the production of polyethers and is a key raw material in the manufacture of nonionic surfactants, plastics, coatings, adhesives, and cleaning agents. The wastewater from propylene oxide production contains a large amount of toxic and harmful substances, requiring appropriate treatment to meet environmental protection standards. Wastewater treatment methods can include the following steps: pretreatment, biochemical treatment, advanced treatment, neutralization and adjustment, and purification. Pretreatment equipment can initially treat the wastewater, removing suspended solids, grease, and solid particles, reducing the difficulty and cost of subsequent treatment. Patent application number CN202123258077.3 proposes a wastewater pretreatment tank, including a bar screen zone, a coagulation zone, and a primary sedimentation zone. The outlet of the bar screen zone is connected to the inlet of the coagulation zone, and the outlet of the coagulation zone is connected to the inlet of the primary sedimentation zone. The bar screen zone, coagulation zone, and primary sedimentation zone together form the wastewater pretreatment tank. This utility model device replaces the grit chamber with a baffle plate coagulation zone, and adds a primary sedimentation zone after the baffle plate coagulation zone. The primary sedimentation zone can remove inorganic and organic suspended solids with a particle size of less than 100μm, while the baffle plate coagulation zone can remove suspended particles and colloids with a particle size of less than 1μm through chemical coagulation and sedimentation. The suspended solids removal capacity far exceeds that of the grit chamber.

[0003] The problem with existing technology is that existing pretreatment tanks usually use filter cloth to collect suspended solids. However, when treating wastewater at different water levels, the installation height of the filter cloth usually needs to be adjusted manually. Moreover, since the filter cloth is inside the pretreatment tank, it takes a long time to manually replace the filter cloth. Adjusting and replacing the filter cloth is difficult, time-consuming and labor-intensive. Summary of the Invention

[0004] To address the problems existing in the prior art, this invention provides a wastewater treatment device for the production of propylene oxide, which has the advantages of automatically adjusting the height of the filter cloth and facilitating filter cloth replacement. This solves the problems of existing filter cloth installation height requiring manual adjustment, filter cloth being located in the pretreatment tank, and manual filter cloth replacement taking a long time, being difficult to adjust and replace, and being time-consuming and labor-intensive.

[0005] The present invention is implemented as follows: a wastewater treatment device for the production of propylene oxide includes a pretreatment tank, an adjustment mechanism is provided on the pretreatment tank, a driving mechanism is provided at one end of the adjustment mechanism, a collection mechanism is provided on the driving mechanism, and a cloth changing mechanism is provided on the adjustment mechanism.

[0006] The adjustment mechanism includes a support frame, a lifting assembly, and a clamping assembly. The support frame is fixedly installed on one side of the upper end of the pretreatment tank. The lifting assembly includes a first motor, a first gear, and a first rack. The first gear meshes with the first rack. The clamping assembly is located at the bottom end of the first rack. The clamping assembly includes a cylinder and a U-shaped clamping block. A second rack is provided on the U-shaped clamping block.

[0007] The drive mechanism includes a second motor, a rotating shaft, and a mixing shaft, with the two ends of the rotating shaft fixedly connected to the output end of the second motor and the mixing shaft, respectively.

[0008] The collection mechanism includes a crossbar, a first connecting component, a second connecting component, an installation component, a fixing component, and a guide component. The first connecting component is connected to the crossbar and the guide component at both ends, respectively. The second connecting component is fixedly connected to the crossbar. The installation component is installed on the second connecting component. The fixing component is used to fix the filter cloth for filtering suspended solids on the installation component. The guide component is movably disposed on the pretreatment tank.

[0009] The fabric changing mechanism includes a third motor and pneumatic grippers. The pneumatic grippers are used to clamp the second connecting component, and the third motor is used to drive the pneumatic grippers to move.

[0010] In a preferred embodiment of the present invention, two fixed plates are fixedly installed on the upper end of the support frame, the first motor is fixedly installed on one of the fixed plates, the first gear is rotatably installed on both fixed plates, the output end of the first motor is fixedly connected to the first gear, and limit posts are fixedly connected to both sides of the first rack, with the limit posts sliding through the upper end of the support frame.

[0011] In a preferred embodiment of the present invention, the first rack and the bottom ends of the two limiting posts are fixedly connected to a mounting plate, the cylinder is fixedly mounted on the mounting plate, the output end of the cylinder is fixedly connected to one side of the U-shaped clamping block, and the second rack is fixedly connected to the middle of the upper end of the U-shaped clamping block.

[0012] In a preferred embodiment of the present invention, a connecting plate is fixedly connected to one end of the support frame, the second motor is fixedly mounted on the connecting plate, a keyway is provided on the rotating shaft, and a limit sleeve is slidably connected to the shaft body.

[0013] In a preferred embodiment of the present invention, one end of the crossbar is fixedly connected to the limiting sleeve, and the other end of the crossbar has an internal movable groove. The first connecting assembly includes a first connecting rod, a second gear is fixedly sleeved on the body of the first connecting rod, the second gear meshes with a second rack, a limiting block and a threaded rod are fixedly connected to both ends of the first connecting rod respectively, and an anti-slip pad is fixedly connected to the side of the threaded rod away from the first connecting rod. The end of the first connecting rod connected to the limiting block is inserted into the movable groove.

[0014] In a preferred embodiment of the present invention, the guide assembly includes a second sleeve rod, a threaded hole is provided on one side of the upper end of the second sleeve rod, the threaded rod is threadedly connected to the threaded hole, a lifting column is slidably connected inside the second sleeve rod, a groove is provided on the side of the lifting column near the threaded hole, an anti-slip pad abuts against the inner wall of the groove, an installation block is fixedly connected to one side of the upper end of the lifting column, a roller is rotatably connected between the inner side of the installation block and the lifting column, and the roller is rotatably connected to the upper end of the pretreatment tank.

[0015] As a preferred embodiment of the present invention, the second connecting component includes a mounting rod and a first sleeve rod. One end of the mounting rod is fixedly connected to a crossbar, and the first sleeve rod is slidably sleeved on the mounting rod. One end of the first sleeve rod is fixedly connected to a positioning block, and the positioning block has an insertion hole.

[0016] As a preferred embodiment of the present invention, the mounting assembly includes a mounting frame for mounting the filter cloth, with collars fixedly connected to the four corners of one end of the mounting frame, and a sleeve block fixedly connected to the upper surface of the other end of the mounting frame, the sleeve block being fitted onto the first sleeve rod.

[0017] In a preferred embodiment of the present invention, the fixing component includes a fixing frame, which is sleeved on one end of the mounting frame. A guide plate is fixedly connected to both sides of the fixing frame, and a connecting block is fixedly connected to each of the four corners of the fixing frame. A fixing rod for fixing the filter cloth is fixedly connected to each connecting block, and one end of the fixing rod is inserted into the collar.

[0018] In a preferred embodiment of the present invention, the support frame is provided with a ball screw and two slide rods. The ball screw is rotatably connected to the support frame, and the two slide rods are respectively located on both sides of the ball screw and fixedly connected to the support frame. The third motor is fixedly installed on one side of the support frame, and the output end of the third motor is fixedly connected to one end of the ball screw. A slider is slidably connected to the ball screw and slide rods. The pneumatic gripper is located directly above the positioning block and fixedly installed on the lower surface of the slider. Two insert rods are fixedly connected to the pneumatic gripper.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0020] 1. This invention clamps the first connecting component with a clamping assembly, allowing the second sleeve rod and the lifting column to move relative to each other. This enables the filter cloth to move with the clamping assembly. The lifting assembly drives the clamping assembly and the filter cloth to move up and down, allowing the height of the filter cloth to be adjusted according to the wastewater level, thus improving the convenience and automation of operation. When the U-shaped clamping block resets, one end of the first connecting assembly presses against the lifting column, fixing the height of the collection mechanism. The drive mechanism drives the collection mechanism to rotate, collecting and filtering suspended solids through the filter cloth. The guide plate guides suspended solids outside the movement trajectory of the filter cloth into the filter cloth, improving the collection effect.

[0021] 2. When replacing the filter cloth, the present invention uses a lifting assembly to move the collection mechanism upward, and a cloth-changing mechanism to clamp the positioning block and push it outward into the pretreatment pool, making it easy for workers to replace. By setting collars at the four corners of the mounting frame and fixing rods at the four corners of the fixing frame, the filter cloth is placed on the four fixing rods, and then the fixing rods are inserted into the collars to lock the fixing frame onto the mounting frame, thus easily completing the fixing and disassembly of the filter cloth. The operation is simple and convenient. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention;

[0023] Figure 2 This is a partial first-view three-dimensional structural diagram of the present invention;

[0024] Figure 3 For the present invention Figure 2 Enlarged view of the structure at point A in the middle;

[0025] Figure 4 This is an exploded view of a first partial structure of the collecting mechanism in this invention;

[0026] Figure 5 This is a cross-sectional view of the crossbar of the present invention;

[0027] Figure 6 This is an exploded view of the second partial structure of the collecting mechanism in this invention;

[0028] Figure 7 This is a partial second-view three-dimensional structural diagram of the present invention;

[0029] Figure 8 For the present invention Figure 7 Enlarged view of the structure at point B in the middle.

[0030] In the diagram: 1. Pretreatment tank; 2. Adjustment mechanism; 3. Collection mechanism; 4. Drive mechanism; 5. Fabric changing mechanism; 201. Support frame; 202. Lifting assembly; 2021. Fixing plate; 2022. First motor; 2023. First gear; 2024. Limiting post; 2025. First rack; 203. Clamping assembly; 2031. Mounting plate; 2032. Cylinder; 2033. U-shaped clamping block; 2034. Second rack; 301. Crossbar; 3011. Movable groove; 302. First connecting assembly; 3021. First connecting rod; 3022. Limiting block; 3023. Second gear; 3024. Threaded rod; 3025. Anti-slip pad; 303. Second connecting assembly; 3031. Mounting rod; 3032. 3033, Positioning block; 3034, Insertion hole; 304, Mounting assembly; 3041, Mounting frame; 3042, Collar; 3043, Sleeve block; 305, Fixing assembly; 3051, Fixing frame; 3052, Connecting block; 3053, Fixing rod; 306, Guide plate; 307, Guide assembly; 3071, Second rod; 3072, Threaded hole; 3073, Lifting column; 3074, Groove; 3075, Mounting block; 3076, Roller; 401, Connecting plate; 402, Second motor; 403, Rotating shaft; 404, Limiting sleeve; 405, Mixing shaft; 501, Third motor; 502, Ball screw; 503, Slide rod; 504, Slider; 505, Pneumatic gripper finger; 506, Insertion rod. Detailed Implementation

[0031] To further understand the invention's content, features, and effects, the following embodiments are provided, and detailed descriptions are given in conjunction with the accompanying drawings.

[0032] The structure of the present invention will now be described in detail with reference to the accompanying drawings.

[0033] Specific reference Figure 1 The present invention provides a wastewater treatment device for the production of propylene oxide, including a pretreatment tank 1, an adjustment mechanism 2 on the pretreatment tank 1, a driving mechanism 4 at one end of the adjustment mechanism 2, a collection mechanism 3 on the driving mechanism 4, and a cloth changing mechanism 5 on the adjustment mechanism 2.

[0034] Specific reference Figures 1-4 The adjustment mechanism 2 includes a support frame 201, a lifting component 202, and a clamping component 203. The support frame 201 is fixedly installed on one side of the upper end of the pretreatment pool 1. The lifting component 202 includes a first motor 2022, a first gear 2023, and a first rack 2025. The first gear 2023 meshes with the first rack 2025. The clamping component 203 is located at the bottom end of the first rack 2025. The clamping component 203 includes a cylinder 2032 and a U-shaped clamping block 2033. A second rack 2034 is provided on the U-shaped clamping block 2033.

[0035] It is understood that in this application, the bottom of the lifting component 202 is connected to the clamping component 203, which is used to drive the clamping component 203 to rise or fall. The clamping component 203 is used to clamp the first connecting component 302, thereby mobilizing the first connecting component 302 to move synchronously. The height of the filter cloth can be adjusted according to the water level of the wastewater, which facilitates the collection and filtration of the filter cloth.

[0036] Specific reference Figure 2 , Figure 3 Two fixing plates 2021 are fixedly installed on the upper end of the support frame 201. The first motor 2022 is fixedly installed on one of the fixing plates 2021. The first gear 2023 is rotatably installed on both fixing plates 2021. The output end of the first motor 2022 is fixedly connected to the first gear 2023. Limiting posts 2024 are fixedly connected on both sides of the first rack 2025. The limiting posts 2024 slide through the upper end of the support frame 201.

[0037] In the specific setup, the lower end of the support frame 201 is fixedly installed on the outer circumference of the pretreatment pool 1, and the upper end is equipped with a lifting component 202, a fabric changing mechanism 5, and a drive mechanism 4. The lifting component 202 drives the first gear 2023 to rotate through the first motor 2022. Through the meshing of the first gear 2023 with the first rack 2025, the first rack 2025 is driven to rise or fall accordingly. The two limiting posts 2024 are T-shaped. The support frame 201 is provided with slots corresponding to the limiting posts 2024 and the first rack 2025. The limiting posts 2024 are slidably connected to the inner wall of the slots, which can limit and guide the first rack 2025 during its movement, ensuring the stability of the first rack 2025 and the clamping component 203.

[0038] Specific reference Figure 3 , Figure 4 The first rack 2025 and the two limit posts 2024 are fixedly connected to the bottom of the mounting plate 2031. The cylinder 2032 is fixedly installed on the mounting plate 2031. The output end of the cylinder 2032 is fixedly connected to one side of the U-shaped clamp 2033. The second rack 2034 is fixedly connected to the middle of the upper end of the U-shaped clamp 2033.

[0039] In this application, cylinder 2032 is used to drive the U-shaped clamp 2033 to move. During use, when cylinder 2032 and U-shaped clamp 2033 move down to the same height as the first connecting rod 3021, cylinder 2032 is activated to extend its output end, causing the U-shaped clamp 2033 to move closer to the first connecting rod 3021, thus clamping the first connecting rod 3021 within the U-shaped clamp 2033. By providing a second rack 2034, during the movement of the U-shaped clamp 2033, the second rack 2034 meshes with the second gear 3023, thereby causing the second gear 3023 to rotate and the first connecting rod 3021 to rotate. When the threaded rod 3024 rotates synchronously with the first connecting rod 3021, the threaded rod 3024 drives the anti-slip pad 3025 to move away from the groove 3074 through the threaded connection between the threaded rod 3024 and the threaded groove. This causes the anti-slip pad 3025 to disengage from the limiting position of the lifting column 3073, allowing the second set of rods 3071 to slide up and down along the lifting column 3073. As the first rack 2025 moves up and down, the U-shaped clamp 2033 drives the first connecting rod 3021 and the second set of rods 3071 to move synchronously. This allows for remote automatic adjustment of the filter cloth height according to the water level, improving the convenience of filter cloth height adjustment.

[0040] Specific reference Figure 1 , Figure 7 The drive mechanism 4 includes a second motor 402, a rotating shaft 403 and a mixing shaft 405. The two ends of the rotating shaft 403 are fixedly connected to the output end of the second motor 402 and the mixing shaft 405, respectively. A connecting plate 401 is fixedly connected to one end of the support frame 201. The second motor 402 is fixedly mounted on the connecting plate 401. A keyway is provided on the rotating shaft 403. A limit sleeve 404 is slidably connected to the shaft of the rotating shaft 403.

[0041] In the specific setup, the second motor 402 is located in the center directly above the pretreatment tank 1, the lower end of the rotating shaft 403 extends into the pretreatment tank 1, the limiting sleeve 404 can slide up and down on the shaft of the rotating shaft 403, and the bottom of the mixing shaft 405 is rotatably connected to the middle of the inner wall of the bottom of the pretreatment tank 1, which supports the rotating shaft 403. When pretreating propylene oxide wastewater, the corresponding suspending agent is added to the tank, and the mixing shaft 405 is rotated to mix it with the wastewater, separating the suspended solids. The rotating shaft 403 drives the collection mechanism 3 to rotate, collecting the suspended solids into the filter cloth, so that the mixing and collection work are carried out simultaneously, improving the work efficiency.

[0042] Specific reference Figure 1 , Figure 2The collection mechanism 3 includes a crossbar 301, a first connecting component 302, a second connecting component 303, an installation component 304, a fixing component 305, and a guide component 307. The first connecting component 302 is connected to the crossbar 301 and the guide component 307 at both ends, respectively. The second connecting component 303 is fixedly connected to the crossbar 301. The installation component 304 is installed on the second connecting component 303. The fixing component 305 is used to fix the filter cloth for filtering suspended solids on the installation component 304. The guide component 307 is movably set on the pretreatment tank 1.

[0043] Specific reference Figure 2 , Figure 4 , Figure 5 , Figure 7 One end of the crossbar 301 is fixedly connected to the limiting sleeve 404, and the other end of the crossbar 301 has an internal movable groove 3011. The first connecting component 302 includes a first connecting rod 3021. A second gear 3023 is fixedly sleeved on the body of the first connecting rod 3021. The second gear 3023 meshes with the second rack 2034. A limiting block 3022 and a threaded rod 3024 are fixedly connected to both ends of the first connecting rod 3021, respectively. An anti-slip pad 3025 is fixedly connected to the side of the threaded rod 3024 away from the first connecting rod 3021. The end of the first connecting rod 3021 connected to the limiting block 3022 is inserted into the movable groove 3011.

[0044] In this application, before the cylinder 2032 pushes the U-shaped clamp 2033 to move, the anti-slip pad 3025 abuts against the lifting column 3073. When the cylinder 2032 pushes the U-shaped clamp 2033 forward, the second rack 2034 drives the second gear 3023 to rotate, causing the anti-slip pad 3025 to disengage from the lifting column 3073. One end of the first connecting rod 3021 drives the limiting block 3022 to move a small distance in the movable groove 3011. After the height of the filter cloth is adjusted, the cylinder 2032 drives the U-shaped clamp 2033 to retract, and the second gear 3023 and the first connecting rod 3021 rotate in opposite directions. Through the cooperation between the threaded rod 3024 and the threaded groove, the anti-slip pad 3025 abuts against the lifting column 3073 again, thereby fixing the position of the second rod 3071 and fixing the height of the collection mechanism 3, preventing the collection mechanism 3 from sliding down under gravity after adjustment.

[0045] Specific reference Figure 1 , Figure 2 , Figure 4The guide assembly 307 includes a second sleeve rod 3071. A threaded hole 3072 is provided on one side of the upper end of the second sleeve rod 3071. A threaded rod 3024 is threadedly connected to the threaded hole 3072. A lifting column 3073 is slidably connected inside the second sleeve rod 3071. A groove 3074 is provided on the side of the lifting column 3073 near the threaded hole 3072. An anti-slip pad 3025 abuts against the inner wall of the groove 3074. An installation block 3075 is fixedly connected to one side of the upper end of the lifting column 3073. A roller 3076 is rotatably connected between the inner side of the installation block 3075 and the lifting column 3073. The roller 3076 is rotatably connected to the upper end of the pretreatment tank 1.

[0046] In this application, the mounting block 3075 is attached to the upper end of the pretreatment tank 1. During the rotation of the crossbar 301 and the first connecting rod 3021 driven by the rotating shaft 403, the second set of rods 3071 and the lifting column 3073 are connected in cooperation with the mounting block 3075, which can support and guide one end of the first connecting rod 3021. By setting the roller 3076 in the mounting block 3075, the smoothness of the rotation of the guide assembly 307 can be improved and the friction between it and the pretreatment tank 1 can be reduced. The guide assembly 307 is also used to support one end of the collection mechanism 3 and keep the mounting assembly 304 and the filter cloth horizontal.

[0047] Specific reference Figure 2 , Figure 6 The second connecting component 303 includes a mounting rod 3031 and a first sleeve rod 3032. One end of the mounting rod 3031 is fixedly connected to the crossbar 301. The first sleeve rod 3032 is slidably sleeved on the mounting rod 3031. One end of the first sleeve rod 3032 is fixedly connected to a positioning block 3033. An insertion hole 3034 is provided on the positioning block 3033.

[0048] It is understood that in this application, the second connecting component 303 is used to slide the mounting component 304 onto the crossbar 301. During operation, the first sleeve rod 3032 is sleeved on the mounting rod 3031, and the two sleeve blocks 3043 are sleeved on the first sleeve rod 3032. The two sleeve blocks 3043 are detachable. When changing the filter cloth, the collecting mechanism 3 moves upward under the drive of the lifting component 202 until it leaves the water surface and moves below the cloth changing mechanism 5. The cloth changing mechanism 5 is connected to the second connecting component 303 to push the mounting component 304 and the filter cloth outside the pretreatment tank 1, which facilitates the replacement of the filter cloth.

[0049] Specific reference Figure 2 , Figure 6 The mounting assembly 304 includes a mounting frame 3041 for mounting the filter cloth. Each of the four corners of one end of the mounting frame 3041 is fixedly connected with a collar 3042. A sleeve block 3043 is fixedly connected to the upper surface of the other end of the mounting frame 3041. The sleeve block 3043 is sleeved on the first sleeve rod 3032.

[0050] Specific reference Figure 2 , Figure 6 The fixing component 305 includes a fixing frame 3051, which is sleeved on one end of the mounting frame 3041. A guide plate 306 is fixedly connected to both sides of the fixing frame 3051, and a connecting block 3052 is fixedly connected to each of the four corners of the fixing frame 3051. A fixing rod 3053 for fixing the filter cloth is fixedly connected to each connecting block 3052, and one end of the fixing rod 3053 is inserted into the collar 3042.

[0051] In the specific setup, the mounting frame 3041 is a rectangular frame, with the end furthest from the collar 3042 being the open end for filter cloth installation. When installing the filter cloth, it is fitted onto the four fixing rods 3053, and then the four fixing rods 3053 are inserted into the four collars 3042 respectively, thus fixing the four corners of the filter cloth. The open end of the filter cloth is then fitted onto the open end of the mounting frame 3041. When the fixing rods 3053 are inserted into the collars 3042, the fixing frame 3051 presses down on the open end of the filter cloth. Furthermore, it is fitted onto the mounting frame 3041 to fix the open end of the filter cloth, thereby completing the fixation of both ends of the filter cloth. When replacing the filter cloth, the fixing frame 3051 drives the fixing rod 3053 to be pulled outward, and the filter cloth can be easily removed. This setting facilitates the installation and removal of the filter cloth. By setting guide plates 306 on both sides of the fixing frame 3051, the suspended matter on both sides of the filter cloth movement trajectory can be guided into the filter cloth, reducing the volume of the mounting component 304 and the fixing component 305.

[0052] Specific reference Figure 2 , Figures 6-8 The fabric changing mechanism 5 includes a third motor 501 and a pneumatic gripper 505. The pneumatic gripper 505 is used to clamp the second connecting component 303. The third motor 501 is used to drive the pneumatic gripper 505 to move. A ball screw 502 and two slide rods 503 are provided on the support frame 201. The ball screw 502 is rotatably connected to the support frame 201. The two slide rods 503 are located on both sides of the ball screw 502 and are fixedly connected to the support frame 201. The third motor 501 is fixedly installed on one side of the support frame 201. The output end of the third motor 501 is fixedly connected to one end of the ball screw 502. A slider 504 is slidably connected to the ball screw 502 and the slide rods 503. The pneumatic gripper 505 is located directly above the positioning block 3033 and is fixedly installed on the lower surface of the slider 504. Two insert rods 506 are fixedly connected to the pneumatic gripper 505.

[0053] In specific setup, when replacing the filter cloth, the second connecting assembly 303 moves upward, and the pneumatic clamp 505 opens. When the positioning block 3033 moves into the clamp, the pneumatic clamp 505 is activated, causing the two insertion rods 506 to be inserted into the corresponding insertion holes 3034. Subsequently, the third motor 501 is activated to drive the lead screw of the ball screw 502 to rotate. The lead screw drives the ball nut to move through its cooperation with the ball nut. The ball nut drives the slider 504 to move. The slider 504 slides along the two slide rods 503, causing the pneumatic clamp 505 and the positioning block 3033 to move away from the third motor 501. The positioning block 3033 drives the first sleeve rod 3032 to move synchronously, causing the first sleeve rod 3032 to slide outward relative to the mounting rod 3031 until the mounting assembly 304 and the filter cloth are moved outside the pretreatment tank 1, making it convenient for staff to replace the filter cloth.

[0054] Working principle of the invention:

[0055] During operation, wastewater from propylene oxide production is first introduced into pretreatment tank 1. The height of the filter cloth is adjusted by monitoring the wastewater level. When the filter cloth needs to be adjusted downwards, the first motor 2022 is started to drive the first gear 2023 to rotate. Through the meshing of the first gear 2023 and the first rack 2025, the first rack 2025 is driven to descend. The limiting post 2024 plays a limiting and guiding role in the movement of the first rack 2025. The first rack 2025 drives the cylinder 2032 and the U-shaped clamp 2033 to move synchronously. When the cylinder 2032 and the U-shaped clamp 2033 move down to the same height as the first connecting rod 3021, the cylinder 2032 is activated to extend its output end, driving the U-shaped clamp 2033 to move closer to the first connecting rod. The movement of 3021 causes the first connecting rod 3021 to be clamped within the U-shaped clamp 2033. During the movement of the U-shaped clamp 2033, the second rack 2034 meshes with the second gear 3023, thereby driving the second gear 3023 and the first connecting rod 3021 to rotate. The threaded rod 3024 rotates synchronously with the first connecting rod 3021. Through the threaded connection between the threaded rod 3024 and the threaded groove, the threaded rod 3024 drives the anti-slip pad 3025 to move away from the groove 3074, causing the anti-slip pad 3025 to disengage from the limiting position on the lifting column 3073. This allows the second rod 3071 to slide up and down along the lifting column 3073. Subsequently, the first rack 2025 continues to move downwards until the height of the filter cloth is relative to the water level. In response, cylinder 2032 then retracts the U-shaped clamp 2033, causing the second gear 3023 and the first connecting rod 3021 to rotate in opposite directions. This causes the anti-slip pad 3025 to press against the lifting column 3073, thus fixing the position of the second sleeve rod 3071 and the height of the collection mechanism 3. Subsequently, the first motor 2022 rotates in the opposite direction, driving the first gear 2023 to move upward, resetting the clamping assembly 203. Then, the corresponding suspending agent is introduced into the pretreatment tank 1, and the second motor 402 is started to drive the rotating shaft 403 and the mixing shaft 405 to rotate. The mixing shaft 405 mixes the suspending agent with the wastewater, and the rotating shaft 403 drives the collection mechanism 3 to rotate, collecting and filtering the separated suspended solids. The filter cloth is replaced periodically. When replacing, the filter cloth is lifted... The lowering component 202 drives the collecting mechanism 3 to move upward. When the positioning block 3033 moves into the gripper finger, the pneumatic gripper finger 505 is activated, causing the two insertion rods 506 to be inserted into the corresponding insertion holes 3034. Subsequently, the third motor 501 is activated to drive the slider 504 to slide, causing the pneumatic gripper finger 505 and the positioning block 3033 to move away from the third motor 501. The positioning block 3033 drives the first sleeve rod 3032 to move synchronously, causing the first sleeve rod 3032 to slide outward relative to the mounting rod 3031 until the mounting component 304 and the filter cloth are moved outside the pretreatment tank 1, making it convenient for the staff to replace the filter cloth. When replacing, the fixing frame 3051 and the fixing rod 3053 are pulled outward, and the filter cloth is taken out from the mounting frame 3041. When installing a new filter cloth...The filter cloth is fitted onto the four fixing rods 3053, and then the four fixing rods 3053 are inserted into the four collars 3042 respectively, thereby fixing the four corners of the filter cloth. The open end of the filter cloth is then fitted onto the open end of the mounting frame 3041. When the fixing rods 3053 are inserted into the collars 3042, the fixing frame 3051 presses down on the open end of the filter cloth and fits onto the mounting frame 3041, fixing the open end of the filter cloth, thus completing the fixing of both ends of the filter cloth.

[0056] In summary, this wastewater treatment equipment for propylene oxide production uses a clamping assembly 203 to clamp the first connecting assembly 302, allowing the second sleeve rod 3071 and the lifting column 3073 to move relative to each other. This enables the filter cloth to move with the clamping assembly 203. The lifting assembly 202 drives the clamping assembly 203 and the filter cloth to move up and down, allowing the height of the filter cloth to be adjusted according to the wastewater level, improving the convenience and automation of operation. When the U-shaped clamping block 2033 resets, one end of the first connecting assembly 302 presses against the lifting column 3073, fixing the height of the collection mechanism 3. The driving mechanism 4 drives the collection mechanism 3 to rotate, collecting suspended solids through the filter cloth. The filter cloth is filtered by a guide plate 306, which directs suspended matter outside the movement trajectory of the filter cloth into the filter cloth to improve the collection effect. When replacing the filter cloth, the lifting component 202 drives the collection mechanism 3 to move upward, and the cloth replacement mechanism 5 clamps the positioning block 3033 and pushes it outward into the pretreatment pool 1, making it easy for staff to replace. By setting collars 3042 at the four corners of the mounting frame 3041 and fixing rods 3053 at the four corners of the fixing frame 3051, the filter cloth is placed on the four fixing rods 3053, and then the fixing rods 3053 are inserted into the collars 3042 to lock the fixing frame 3051 onto the mounting frame 3041, thus easily completing the fixing and disassembly of the filter cloth. The operation is simple and convenient.

[0057] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0058] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A wastewater treatment device for the production of propylene oxide, comprising a pretreatment tank (1), characterized in that: The pretreatment pool (1) is provided with an adjustment mechanism (2), one end of the adjustment mechanism (2) is provided with a drive mechanism (4), the drive mechanism (4) is provided with a collection mechanism (3), and the adjustment mechanism (2) is provided with a cloth changing mechanism (5). The adjustment mechanism (2) includes a support frame (201), a lifting assembly (202), and a clamping assembly (203). The support frame (201) is fixedly installed on one side of the upper end of the pretreatment tank (1). The lifting assembly (202) includes a first motor (2022), a first gear (2023), and a first rack (2025). The first gear (2023) meshes with the first rack (2025). The clamping assembly (203) is located at the bottom end of the first rack (2025). The clamping assembly (203) includes a cylinder (2032) and a U-shaped clamping block (2033). The drive mechanism (4) includes a second motor (402), a rotating shaft (403) and a mixing shaft (405). One end of the support frame (201) is fixedly connected to a connecting plate (401). The second motor (402) is fixedly mounted on the connecting plate (401). A keyway is provided on the rotating shaft (403). A limit sleeve (404) is slidably connected to the shaft of the rotating shaft (403). The two ends of the rotating shaft (403) are fixedly connected to the output end of the second motor (402) and the mixing shaft (405) respectively. The collection mechanism (3) includes a crossbar (301), a first connecting component (302), a second connecting component (303), an installation component (304), a fixing component (305), and a guide component (307). The second connecting component (303) includes an installation rod (3031) and a first sleeve rod (3032). One end of the installation rod (3031) is fixedly connected to the crossbar (301), and the first sleeve rod (3032) is slidably sleeved on the installation rod (3031). Both ends of the first connecting component (302) are connected to the crossbar (301) and the guide component (307) respectively. The installation component (304) is installed on the second connecting component (303). The fixing component (305) is used to fix the filter cloth for filtering suspended solids on the installation component (304). The guide component (307) is movably set on the pretreatment tank (1). One end of the crossbar (301) is fixedly connected to the limiting sleeve (404). The fabric changing mechanism (5) includes a third motor (501) and a pneumatic gripper (505). The pneumatic gripper (505) is used to clamp the second connecting component (303), and the third motor (501) is used to drive the pneumatic gripper (505) to move.

2. The wastewater treatment equipment for propylene oxide production as described in claim 1, characterized in that: Two fixing plates (2021) are fixedly installed on the upper end of the support frame (201). The first motor (2022) is fixedly installed on one of the fixing plates (2021). The first gear (2023) is rotatably installed on both fixing plates (2021). The output end of the first motor (2022) is fixedly connected to the first gear (2023). Limiting posts (2024) are fixedly connected on both sides of the first rack (2025). The limiting posts (2024) slide through the upper end of the support frame (201).

3. The wastewater treatment equipment for propylene oxide production as described in claim 2, characterized in that: The first rack (2025) and the two limiting posts (2024) are fixedly connected to the bottom end of the mounting plate (2031). The cylinder (2032) is fixedly installed on the mounting plate (2031). The output end of the cylinder (2032) is fixedly connected to one side of the U-shaped clamp (2033).

4. The wastewater treatment equipment for propylene oxide production as described in claim 3, characterized in that: The U-shaped clamp (2033) is provided with a second rack (2034), which is fixedly connected to the middle of the upper end of the U-shaped clamp (2033). The other end of the crossbar (301) is provided with a movable groove (3011). The first connecting assembly (302) includes a first connecting rod (3021). A second gear (3023) is fixedly sleeved on the body of the first connecting rod (3021). The second gear (3023) meshes with the second rack (2034). Limiting blocks (3022) and threaded rods (3024) are fixedly connected to both ends of the first connecting rod (3021). An anti-slip pad (3025) is fixedly connected to the side of the threaded rod (3024) away from the first connecting rod (3021). The end of the first connecting rod (3021) connected to the limiting block (3022) is inserted into the movable groove (3011).

5. The wastewater treatment equipment for propylene oxide production as described in claim 4, characterized in that: The guide assembly (307) includes a second sleeve rod (3071), a threaded hole (3072) is provided on one side of the upper end of the second sleeve rod (3071), the threaded rod (3024) is threadedly connected to the threaded hole (3072), a lifting column (3073) is slidably connected inside the second sleeve rod (3071), a groove (3074) is provided on the side of the lifting column (3073) near the threaded hole (3072), the anti-slip pad (3025) abuts against the inner wall of the groove (3074), an installation block (3075) is fixedly connected to one side of the upper end of the lifting column (3073), a roller (3076) is rotatably connected between the inner side of the installation block (3075) and the lifting column (3073), and the roller (3076) is rotatably connected to the upper end of the pretreatment pool (1).

6. The wastewater treatment equipment for propylene oxide production as described in claim 1, characterized in that: The mounting assembly (304) includes a mounting frame (3041) for mounting the filter cloth. Each of the four corners of one end of the mounting frame (3041) is fixedly connected with a collar (3042). A sleeve block (3043) is fixedly connected to the upper surface of the other end of the mounting frame (3041). The sleeve block (3043) is sleeved on the first sleeve rod (3032).

7. The wastewater treatment equipment for propylene oxide production as described in claim 6, characterized in that: The fixing component (305) includes a fixing frame (3051), which is sleeved on one end of the mounting frame (3041). Both sides of the fixing frame (3051) are fixedly connected to guide plates (306), and each corner of the fixing frame (3051) is fixedly connected to a connecting block (3052). Each connecting block (3052) is fixedly connected to a fixing rod (3053) for fixing the filter cloth, and one end of the fixing rod (3053) is inserted into the collar (3042).

8. The wastewater treatment equipment for producing propylene oxide as described in claim 5, characterized in that: The first sleeve rod (3032) is fixedly connected to a positioning block (3033) at one end. The positioning block (3033) has an insertion hole (3034). The support frame (201) is provided with a ball screw (502) and two slide rods (503). The ball screw (502) is rotatably connected to the support frame (201). The two slide rods (503) are located on both sides of the ball screw (502) and fixedly connected to the support frame (201). The third motor (501) is fixedly installed on the support frame. On one side of the support frame (201), the output end of the third motor (501) is fixedly connected to one end of the ball screw (502). A slider (504) is slidably connected to the ball screw (502) and the slide rod (503). The pneumatic clamp (505) is located directly above the positioning block (3033) and is fixedly installed on the lower surface of the slider (504). Two insert rods (506) are fixedly connected to the pneumatic clamp (505). When the filter cloth is replaced, the two insert rods (506) are inserted into the corresponding insertion holes (3034).

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