An industrial wastewater treatment device for acetylacetone chromium production

Abstract

The application relates to an industrial wastewater treatment device for acetylacetone chromium production and belongs to the technical field of water treatment equipment. The application comprises a pool body, a partition plate is arranged in the pool body, the partition plate divides the pool body into a reaction pool and a sedimentation pool, a collecting mechanism is arranged in the reaction pool, the collecting mechanism comprises a rotating shaft, a mesh plate assembly and a material collecting cylinder, the rotating shaft is rotatably arranged in the reaction pool, the mesh plate assembly is connected to the outer side wall of the rotating shaft, the material collecting cylinder is connected to the side of the mesh plate assembly away from the rotating shaft, a material collecting inlet is arranged in the outer side wall of the material collecting cylinder, the rotating shaft can rotate to drive the mesh plate assembly to collect flocculating substances in the reaction pool, and the flocculating substances can enter the inner cavity of the material collecting cylinder under the centrifugal action, a material collecting disc is connected to the top of the material collecting cylinder, the material collecting disc is communicated with the inner cavity of the material collecting cylinder, a movable mesh plate is adaptively inserted into the material collecting cylinder, and the movable mesh plate can reciprocatingly move up and down in the material collecting cylinder. The application can timely remove the flocculating substances in the reaction cavity, and the flocculating substances in the reaction pool are prevented from being too much to affect the flocculation reaction efficiency.

Description

Technical Field

[0001] This invention relates to the field of water treatment equipment technology, and in particular to an industrial wastewater treatment device for the production of chromium acetylacetone. Background Technology

[0002] Chromium acetylacetone is an important organometallic complex widely used in catalyst precursors, magnetic materials, vapor deposition sources, and fine chemical synthesis. Its industrial production typically involves a coordination reaction between trivalent chromium salts and acetylacetone in an alkaline or buffer system, followed by purification processes such as washing, extraction, and crystallization. However, the preparation of chromium acetylacetone generates large quantities of highly concentrated and complex industrial wastewater, which often contains heavy metals and suspended solids. To protect the environment, safeguard public health, and ensure the sustainable use of water resources, this wastewater must be treated before discharge.

[0003] Flocculation is an effective physicochemical treatment method for industrial wastewater. By adding flocculants, fine particles in the water aggregate into larger flocs, making them easier to settle or filter. Flocculation treatment can significantly improve wastewater treatment efficiency and reduce the content of suspended solids and organic matter.

[0004] In existing technologies, when treating industrial wastewater through flocculation, the wastewater is typically first injected into a sedimentation tank, then a flocculant is added to the sedimentation tank, and finally the wastewater is stirred to ensure thorough mixing of the wastewater and flocculant, causing small particles in the wastewater to flocculate. For example, a high-efficiency flocculation tank disclosed in patent publication number CN207525032U includes a tank body with a partition dividing the tank into a reaction tank and a sedimentation tank. The reaction tank contains a flocculant feeding box and a stirring device, and the sedimentation tank has a rectangular opening at the bottom, with a sedimentation chamber below the opening.

[0005] When using this flocculation tank for wastewater treatment, flocculant is added to the reaction tank through the flocculant feeding box, and then the stirring device is activated to mix the flocculant and water thoroughly to form flocs. However, as wastewater is continuously injected into the reaction tank, the flocculation reaction continues, and more and more flocs are generated. A large amount of flocs cannot settle in time and remain suspended in the reaction tank, increasing the viscosity of the liquid in the reaction tank, slowing down the flow rate of the liquid, affecting the collision and aggregation of impurity particles, and increasing the flow resistance of the liquid in the reaction tank, thus weakening the stirring effect and causing the flocculation rate in the reaction tank to become slower and slower. Summary of the Invention

[0006] This invention provides an industrial wastewater treatment device for the production of chromium acetylacetone, which solves the technical problem in the prior art where, when using sedimentation tanks to treat industrial wastewater, the increasing amount of suspended flocs generated in the reaction tank and the inability to clean them in a timely manner lead to increasing liquid viscosity and resistance, resulting in a slower and slower flocculation rate.

[0007] To solve the above problems, the present invention provides an industrial wastewater treatment device for chromium acetylacetone production, which adopts the following technical solution: An industrial wastewater treatment device for the production of chromium acetylacetone includes a tank body with a baffle plate dividing the tank body into a reaction tank and a sedimentation tank. The reaction tank is equipped with a collection mechanism, which includes a rotating shaft, a screen assembly, and a collection cylinder. The rotating shaft extends vertically and is rotatably installed in the reaction tank around its central axis. The screen assembly is arranged vertically and connected to the outer wall of the rotating shaft. The collection cylinder extends vertically and is connected to the side of the screen assembly facing away from the rotating shaft. The outer wall of the collection cylinder is provided with a vertically extending collection inlet, which is located on the side of the screen assembly that faces the flocculants during rotation and is arranged towards the rotating shaft. The rotating shaft can rotate to drive the screen assembly to collect the flocs in the reaction tank, and make the flocs pass through the collection inlet and enter the inner cavity of the collection cylinder under centrifugal force; The top of the collecting cylinder is connected to a collecting tray, which is connected to the inner cavity of the collecting cylinder. The collecting tray is arranged above the liquid surface in the reaction tank. A movable screen plate is inserted into the collecting cylinder and moves up and down. The movable screen plate can move up and down in the collecting cylinder to push the flocs collected in the collecting cylinder upward into the collecting tray.

[0008] Using the above technical solution, when a large amount of flocculent material accumulates in the reaction tank, the rotating shaft drives the screen assembly to rotate. As the screen assembly rotates, it scoops up the flocculent material in the reaction tank, causing the flocculent material to aggregate together. The aggregated flocculent material rotates in the reaction tank under the drive of the screen assembly and moves away from the rotating shaft under centrifugal force. Finally, it passes through the collection inlet and enters the collection cylinder, where it is collected. The movable screen moves upward, pushing the flocculent material in the collection cylinder upward, and finally pushing the flocculent material into the collection pan located above the liquid surface. This removes the flocculent material in the reaction tank, reduces the flocculent material content in the reaction tank, and prevents the increasing amount of floating flocculent material in the reaction tank from affecting the efficiency of subsequent flocculation reactions.

[0009] Furthermore, the screen assembly includes a screen support and a main screen and two auxiliary screens mounted on the screen support and parallel to each other. The main screen is located on the side of the screen assembly facing the flocculants during rotation, and the two auxiliary screens are located on the side of the screen assembly facing away from the flocculants during rotation. The two auxiliary screens are close to each other and are slidably mounted on the screen support in a direction perpendicular to the main screen. One of the auxiliary screens can move vertically. Each auxiliary screen has multiple rows of mesh holes arranged at intervals in the vertical direction. The rows of mesh holes on the two auxiliary screens can be staggered vertically when the two auxiliary screens move vertically relative to each other, so that the mesh holes on each auxiliary screen are blocked by the other auxiliary screen.

[0010] Using the above technical solution, the screen plate assembly includes a main screen plate and two auxiliary screen plates. During the rotation of the screen plate assembly, the main screen plate comes into contact with the flocculent material and is prone to clogging. When the main screen plate is clogged, the two auxiliary screen plates move up and down relative to each other, and the rows of mesh holes on the auxiliary screen plates are staggered. At this time, the two adjacent auxiliary screen plates are equivalent to a solid plate, which moves towards the main screen plate, pushing the water flow between the main screen plate and the two auxiliary screen plates towards the main screen plate, flushing out the impurities on the clogged main screen plate, thus cleaning the main screen plate and preventing it from clogging.

[0011] Furthermore, the secondary mesh plate near the main mesh plate in the mesh plate assembly is slidably mounted on the mesh plate support in the vertical direction. A pushing member is connected to the secondary mesh plate, and a first elastic member that can extend and retract vertically is connected between the pushing member and the mesh plate support. A pushing member is provided on the pool body. When the pushing member rotates with the mesh plate assembly and comes into contact with the pushing member, it can be pushed by the pushing member to drive the corresponding secondary mesh plate to move up or down, so that the rows of mesh holes on the two secondary mesh plates are staggered.

[0012] Using the above technical solution, during the rotation of the mesh plate assembly, the jacking component pushes the pushing component to move the sub-mesh plate along the vertical direction, thereby causing the rows of mesh holes on the two sub-mesh plates to be staggered. The vertical position of the sub-mesh plate is adjusted by the cooperation of the jacking component and the pushing component. The structure is ingenious and does not require a separate drive mechanism to drive the sub-mesh plate to move vertically, which can save power costs.

[0013] Furthermore, a horizontally extending swing arm is provided on the collecting cylinder. The swing arm is hinged to the collecting cylinder and is located on the side of the screen assembly facing away from the flocculants during rotation. The inner end of the swing arm is opposite to the screen assembly, and the outer end extends to the side of the collecting cylinder facing away from the screen assembly. A torsion spring is connected between the swing arm and the collecting cylinder. When the torsion spring is in a free state, the inner end of the swing arm presses against the secondary screen plate in the screen assembly away from the main screen plate. A stop bar is provided in the reaction tank. The stop bar can contact the outer end of the swing arm after the pushing component is pushed by the pushing component, so as to actuate the swing arm to swing, thereby driving the inner end of the swing arm to push the two secondary screen plates toward the main screen plate.

[0014] Using the above technical solution, after the pushing component is pushed by the jacking component, the rows of mesh holes on the two sub-mesh plates are staggered. Then, the stop rod pushes the swing rod to rotate. When the swing rod rotates, it can push the two sub-mesh plates to move towards the main mesh plate. The movement of the two sub-mesh plates towards the main mesh plate is achieved by the cooperation of the stop rod and the swing rod combined with the rotation of the mesh plate assembly. The structure is ingenious and does not require a separate drive mechanism to drive the two sub-mesh plates to move towards the main mesh plate, which can save power costs.

[0015] Furthermore, a vertically extending transmission screw is rotatably installed inside the collection cylinder. A movable screen plate is inserted into the collection cylinder to prevent rotation. The movable screen plate is spirally fitted onto the transmission screw. The bottom end of the transmission screw extends to the outside of the collection cylinder and is coaxially connected to a transmission gear. The bottom of the pool is provided with an outer arc-shaped rack and an inner arc-shaped rack arranged opposite to each other and coaxially. The outer arc-shaped rack has meshing teeth on its outer side, and the inner arc-shaped rack has meshing teeth on its inner side. The outer diameter of the outer arc-shaped rack is smaller than the inner diameter of the inner arc-shaped rack. As the collection cylinder rotates around the axis, the transmission gear can sequentially mesh with the inner arc-shaped rack and the outer arc-shaped rack to drive the transmission gear to switch between forward and reverse rotation, thereby driving the movable screen plate to move up and down reciprocally inside the collection cylinder.

[0016] Using the above technical solution, during the rotation of the mesh plate assembly, the transmission gear is driven to revolve around the rotating shaft. The transmission gear meshes with the inner arc-shaped rack and the outer arc-shaped rack in sequence, driving the gear to rotate and continuously switching between forward and reverse rotation. The gear drives the transmission screw to rotate, thereby driving the movable mesh plate to move up and down reciprocally. Through the mutual cooperation between the transmission screw, transmission gear, outer arc-shaped rack and inner arc-shaped rack, combined with the rotation of the mesh plate assembly, the movable mesh plate is driven to move up and down reciprocally. The structure is simple and ingenious, and there is no need to set up a separate drive mechanism to drive the movable mesh plate to move up and down, which can save power costs.

[0017] Furthermore, the collection tray is annular and coaxial with the rotating shaft. The top of the collection tray is open, and the bottom of the collection tray is connected to a collection box that communicates with the inner cavity of the collection tray. A push plate is provided on the pool body, and the bottom end of the push plate is inserted into the inner cavity of the collection tray.

[0018] Using the above technical solution, a collection box is connected to the bottom of the collection tray, which can increase the collection capacity. A pusher plate is provided on the pool body. As the collection tray rotates around the central axis of the rotating shaft with the mesh plate assembly, the pusher plate can push the flocculents collected in the collection tray into the collection box, preventing the flocculents from accumulating on the collection tray.

[0019] Furthermore, there is a gap between the outer arc-shaped rack and the inner arc-shaped rack, and the push plate is positioned vertically opposite the gap between the outer arc-shaped rack and the inner arc-shaped rack.

[0020] Using the above technical solution, when the collecting cylinder rotates to the interval area between the outer arc-shaped rack and the inner arc-shaped rack, the movable screen plate completes an upward stroke and moves to the top of the collecting cylinder. Since the transmission gear is not engaged with the outer arc-shaped rack and the inner arc-shaped rack at this time, the movable screen plate will stay at this position for a period of time. At the same time, since the push plate is vertically opposite to the interval area between the outer arc-shaped rack and the inner arc-shaped rack, the push plate will push away the flocculent material accumulated on the movable screen plate as the collecting cylinder rotates through this interval area, thereby preventing the flocculent material accumulated directly above the movable screen plate from being brought back into the collecting cylinder when the movable screen plate moves downward.

[0021] Furthermore, a stirring rod is connected to the outside of the rotating shaft.

[0022] Using the above technical solution, the stirring rod rotates with the rotating shaft inside the reaction chamber, stirring the sewage and flocculant inside the reaction chamber, thereby improving the flocculation efficiency.

[0023] Furthermore, the stirring rods are arranged in two sets horizontally and symmetrically on the outside of the rotating shaft, and each set includes multiple stirring rods distributed at equal intervals.

[0024] Furthermore, the mesh plate assembly is provided in two sets, with the two sets of mesh plate assemblies distributed 180° apart on the outside of the rotating shaft.

[0025] The beneficial effects of the industrial wastewater treatment device for chromium acetylacetone production provided by the present invention are: during the flocculation process, the generated flocs can be collected and discharged through the collection mechanism, effectively preventing the continuous increase of flocs in the reaction tank from affecting the subsequent flocculation efficiency; the newly injected wastewater can fully react with the flocculant, resulting in better flocculation effect. Attached Figure Description

[0026] Figure 1 A three-dimensional structural schematic diagram of an industrial wastewater treatment device for acetylacetone chromium production provided by the present invention; Figure 2 A first-view structural schematic diagram of the collection mechanism in an industrial wastewater treatment device for chromium acetylacetone production provided by the present invention. Figure 3 This is a second-view structural schematic diagram of the collection mechanism in an industrial wastewater treatment device for chromium acetylacetone production provided by the present invention. Figure 4 A third-view structural schematic diagram of the collection mechanism in an industrial wastewater treatment device for chromium acetylacetone production provided by the present invention. Figure 5 for Figure 4 Enlarged structural diagram at point A; Figure 6A schematic diagram of the screen assembly and rotating shaft in an industrial wastewater treatment device for chromium acetylacetone production provided by the present invention. Figure 7 This is a schematic diagram of the mesh plate assembly in an industrial wastewater treatment device for chromium acetylacetone production provided by the present invention. Figure 8 for Figure 7 Enlarged structural diagram at point B; Figure 9 This is a schematic diagram of the structure of the first screen plate in an industrial wastewater treatment device for acetylacetone chromium production provided by the present invention. Figure 10 This is a schematic diagram of the structure of a horizontal support rod in an industrial wastewater treatment device for chromium acetylacetone production provided by the present invention.

[0027] Explanation of reference numerals in the attached figures: 1. Tank body; 101. Reaction tank; 102. Sedimentation tank; 2. Baffle plate; 3. Crossbeam; 4. Drive motor; 5. Rotating shaft; 6. Stirring rod; 7. Pushing component; 8. Push plate; 9. Stop bar; 10. Collection tray; 11. Collection cylinder; 111. Collection inlet; 12. Collection box; 13. Swing rod; 14. Pushing component; 15. Horizontal support rod; 151. U-shaped groove; 152. U-shaped chute; 16. Secondary mesh plate segment; 17. Connecting plate segment; 18. Inner arc-shaped rack; 19. Outer arc-shaped rack; 20. Transmission gear; 21. First elastic element; 22. Main mesh plate; 23. Movable mesh plate; 24. L-shaped connecting plate; 25. Sliding block; 26. Connecting vertical rod; 27. Pushing plate; 28. Connecting column; 29. ​​Guide rod. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Those skilled in the art should understand that the embodiments described below are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0029] The following is one embodiment of an industrial wastewater treatment device for chromium acetylacetone production provided by the present invention: like Figures 1-10 As shown, an industrial wastewater treatment device for the production of chromium acetylacetone includes a tank body 1, a collection mechanism, a collection tray 10, a collection cylinder 11, a collection box 12, a push plate 8, a pusher 7, a swing rod 13, and a stop rod 9.

[0030] like Figure 1As shown, the top of the pool 1 is open, and a vertically arranged partition 2 is provided inside the pool 1, dividing the pool 1 into a reaction pool 101 and a sedimentation pool 102 arranged sequentially from left to right. A gap is provided between the bottom end of the partition 2 and the bottom surface of the pool 1 to allow communication between the reaction pool 101 and the sedimentation pool 102. A horizontal beam 3 extending left and right is provided at the top of the pool 1, with its left and right ends respectively supporting the left side wall of the pool 1 and the top of the partition 2.

[0031] like Figures 1-4 As shown, the collection mechanism includes a rotating shaft 5, a mesh plate assembly, and a collection cylinder 11. The rotating shaft 5 is located inside the reaction tank 101 and extends vertically. The top end of the rotating shaft 5 is rotatably mounted on the aforementioned crossbeam 3. A drive motor 4 is mounted on the crossbeam 3, and the drive motor 4 is connected to the rotating shaft 5 to drive the rotating shaft 5 to rotate. Two sets of stirring rods are connected to the rotating shaft 5. The two sets of stirring rods are symmetrically distributed on both sides of the rotating shaft 5. Each set of stirring rods includes multiple stirring rods 6 evenly spaced vertically. The stirring rods 6 are perpendicular to the rotating shaft 5 and fixed to the rotating shaft 5.

[0032] There are two sets of screen plate assemblies. Both sets of screen plate assemblies are connected to the rotating shaft 5 and are arranged symmetrically on both sides of the rotating shaft 5. The two sets of screen plate assemblies and the two sets of stirring rods are staggered in the circumference of the rotating shaft 5.

[0033] The mesh panel assembly includes a mesh panel support, a main mesh panel 22, and a secondary mesh panel. The mesh panel support includes multiple horizontal support rods 15 evenly spaced vertically, each horizontal support rod 15 perpendicular to and fixed to the rotating shaft 5. Figure 10 As shown, the horizontal support rod 15 has three U-shaped slots 151 evenly spaced along its length. The U-shaped slots 151 penetrate the horizontal support rod 15 vertically, and their openings face the opposite direction to the rotation of the horizontal support rod 15. The bottom of the horizontal support rod 15 also has a U-shaped groove 152 that penetrates the horizontal support rod 15 along its length and faces downwards. Figure 5 , Figure 6 As shown, multiple horizontally extending guide rods 29 are also vertically connected to the horizontal support rod 15, and the guide rods 29 are located on the rear side of the horizontal support rod 15 in the direction of rotation.

[0034] like Figure 7 As shown, the main mesh plate 22 is arranged in a vertical plane. The main mesh plate 22 is attached to the side of the multiple horizontal support rods 15 in the mesh plate bracket that faces away from the U-shaped groove 151, and is fixedly connected to the multiple horizontal support rods 15 in the mesh plate bracket.

[0035] Two secondary mesh plates are provided, parallel to the main mesh plate 22. The two secondary mesh plates are slidably connected together via vertically extending T-shaped grooves and T-shaped sliders, with the two secondary mesh plates abutting against each other. For example... Figure 9As shown, the sub-mesh plate includes sub-mesh plate segments 16 and connecting plate segments 17. There are three sub-mesh plate segments 16, which are evenly distributed along the vertical direction. Each pair of adjacent sub-mesh plate segments 16 is connected by three connecting plate segments 17. The three connecting plate segments 17 between two sub-mesh plate segments 16 are evenly distributed along the width direction of the sub-mesh plate segment 16.

[0036] like Figure 6 , Figure 7 As shown, both secondary mesh panels are slidably installed on the mesh panel bracket in a direction perpendicular to the main mesh panel 22. Specifically, the secondary mesh panel segments 16 are inserted between two adjacent horizontal support rods 15, and the three connecting plate segments 17 between each pair of adjacent secondary mesh panel segments 16 are respectively inserted into three U-shaped slots 151 on the horizontal support rods 15. The connecting plate segments 17 can slide along the depth direction within the U-shaped slots 151, thereby allowing the secondary mesh panels to be slidably installed on the mesh panel bracket in a direction perpendicular to the main mesh panel 22.

[0037] For ease of description, the sub-screen plate closer to the main screen plate 22 is referred to as the first sub-screen plate, and the sub-screen plate farther from the main screen plate 22 is referred to as the second sub-screen plate.

[0038] like Figure 8 As shown, the top of each sub-mesh plate segment 16 in the first sub-mesh plate is slidably inserted into the U-shaped groove 152 on the corresponding horizontal support rod 15, so that the first sub-mesh plate can slide in the vertical direction on the mesh plate support. The U-shaped groove 152 plays a guiding role in the vertical sliding of the sub-mesh plate.

[0039] like Figure 6 , Figure 7 , Figure 9 As shown, the top of the first sub-mesh plate is also connected to three L-shaped connecting plates 24, which are evenly spaced along the width direction of the first sub-mesh plate. Each L-shaped connecting plate 24 includes a vertical section and a horizontal section. The vertical section is connected to the top of the first sub-mesh plate and inserted into a U-shaped slot 151 on the topmost horizontal support rod 15. The horizontal section is located above the horizontal support rod 15. A pusher 14 is connected to the top of each of the three horizontal sections. The pusher 14 is a long bar extending along the width direction of the first sub-mesh plate, and its top has an arc-shaped pusher surface. A first elastic element 21 is connected to the bottom of each horizontal section. The first elastic element 21 is a compression spring capable of extending and retracting in the vertical direction. A slider 25 is connected to the bottom of the first elastic element 21. The slider 25 is slidably mounted on the top of the topmost horizontal support rod 15 in a direction perpendicular to the first sub-mesh plate, and the slider 25 and the horizontal support rod 15 are anti-detached in the vertical direction.

[0040] like Figures 4-8As shown, each connecting plate segment 17 in the second sub-mesh panel is connected to a connecting post 28 on the side facing away from the main mesh panel 22. Each of the multiple connecting posts 28 located at the same horizontal height is connected to a push plate 27 at one end facing away from the connecting plate segment 17. The push plate 27 is parallel to the horizontal support rod 15. The push plate 27 is slidably fitted onto multiple guide rods 29 on the corresponding horizontal support rod 15. The multiple push plates 27 arranged at intervals are all connected to a vertically extending connecting rod 26.

[0041] When the pushing member 14 is pushed downwards, it can drive the L-shaped connecting plate 24 and the first auxiliary mesh plate to slide downwards. When the auxiliary mesh plate segment 16 in the first auxiliary mesh plate slides downwards and disengages from the U-shaped groove 152, the first and second auxiliary mesh plates can be pushed and move towards the main mesh plate 22. A second elastic member is provided between the first auxiliary mesh plate and the main mesh plate 22. The second elastic member is a compression spring that can extend and retract in the horizontal direction. One end of the second elastic member is connected to the main mesh plate 22, and the other end is pressed against the first auxiliary mesh plate. The second elastic member can push the first and second auxiliary mesh plates to reset in the horizontal direction.

[0042] like Figures 1-4 As shown, the collection disc 10 is connected to the top surface of the two topmost stirring rods 6 on the rotating shaft 5, and the collection disc 10 is located above the mesh plate assembly. The collection disc 10 is annular, and its cross-section is U-shaped with the opening facing upwards.

[0043] like Figures 2-3 As shown, there are two collecting cylinders 11, which are symmetrically arranged on both sides of the rotating shaft 5 and located on the side of the two sets of mesh plate assemblies facing away from the rotating shaft 5, respectively. The collecting cylinders 11 are fixedly connected to the bottom of the collecting pan 10. The collecting cylinders 11 extend vertically, with an open top and a circular plate at the bottom. The circular plate has a through hole running vertically through the cylinder, and the top of the collecting cylinder 11 communicates with the inner cavity of the collecting pan 10. Figure 3 As shown, the side wall of the collecting cylinder 11 is provided with a vertically extending collecting inlet 111. The collecting inlet 111 is located on the side of the corresponding mesh plate assembly that faces the flocculants during rotation, and the opening is set towards the rotating shaft 5.

[0044] A vertically extending drive screw is rotatably installed inside the collecting cylinder 11. The bottom end of the drive screw passes through the collecting cylinder 11 and extends to the bottom of the collecting cylinder 11. A drive gear 20 is coaxially fixed to the bottom end of the drive screw. A circular movable mesh plate 23 that can move up and down is inserted into the collecting cylinder 11 to prevent rotation. The movable mesh plate 23 is spirally fitted onto the drive screw.

[0045] On the bottom wall of the reaction tank 101, a coaxial outer arc-shaped rack 19 and an inner arc-shaped rack 18 are fixedly installed. The outer diameter of the outer arc-shaped rack 19 is smaller than the inner diameter of the inner arc-shaped rack 18, and there is a gap between the outer arc-shaped rack 19 and the inner arc-shaped rack 18. The aforementioned rotating shaft 5 is coaxial with the outer arc-shaped rack 19 and the inner arc-shaped rack 18. During the rotation of the rotating shaft 5, it can drive the transmission gear 20 to revolve around the central axis of the rotating shaft 5 and make the transmission gear 20 mesh with the inner arc-shaped rack 18 and the outer arc-shaped rack 19 in sequence, so as to drive the transmission gear 20 to continuously switch between forward and reverse rotation, thereby driving the movable screen plate 23 to move up and down reciprocally in the collection cylinder 11.

[0046] There are two collection boxes 12, both connected to the bottom of the collection pan 10 and communicating with the inner cavity of the collection pan 10. The two collection boxes 12 and the two collection cylinders 11 are staggered in the circumference of the collection pan 10. To more clearly show the structure of the chemical wastewater treatment device and avoid obstruction, the collection box 12 in the figure is only a schematic diagram, and the actual volume is larger than that shown in the figure.

[0047] like Figure 1 As shown, the push plate 8 is connected to the crossbeam 3 and located below the crossbeam 3. The push plate 8 is inserted into the inner cavity of the collection tray 10. The push plate 8 is vertically aligned with the ends of the outer arc-shaped rack 19 and the inner arc-shaped rack 18.

[0048] The pusher 7 is connected to the crossbeam 3 and located below it. The pusher 7 is a block structure with a fan-shaped cross-section. It is located between the rotating shaft 5 and the push plate 8 and above the mesh assembly. During the rotation of the mesh assembly, when the pusher 14 moves to contact the pusher 7, the pusher 7 pushes the pusher 14 downward through its arc-shaped pusher surface, thereby causing the first mesh plate to move downward. This causes the mesh holes on the first and second mesh plates to be staggered vertically, forming a sealed solid plate structure.

[0049] Two swing rods 13 are provided, which are arranged symmetrically on both sides of the rotating shaft 5 and connected to the two collection cylinders 11 respectively. The swing rods 13 extend horizontally, and the middle part of the swing rods 13 is hinged to the collection cylinders 11. A torsion spring is installed at the hinge position, and the torsion spring is connected between the swing rods 13 and the collection cylinders 11. The swing rods 13 are located on the side of the mesh plate assembly that faces away from the flocculants during rotation. The inner end of the swing rods 13 is pressed against the outer side of the connecting vertical rod 26 on the corresponding side, and the outer end extends to the outer side of the collection plate 10.

[0050] like Figure 1As shown, the baffle 9 is located inside the reaction tank 101. The baffle 9 extends vertically and its top end is fixedly connected to the crossbeam 3. The baffle 9 is located on the side of the pusher 7 facing away from the rotating shaft 5 and on the outside of the collection plate 10. During rotation, the outer end of the swing rod 13 can contact the baffle 9 and be pushed by the baffle 9 to rotate around the hinge point, thereby pushing the connecting vertical rod 26 to move the two auxiliary mesh plates toward the main mesh plate 22.

[0051] In use, wastewater is injected into the reaction tank 101, followed by flocculant. After the flocculation reaction has proceeded for a period of time, the drive motor 4 is started, driving the screen assembly and stirring rod 6 to rotate, stirring the wastewater and flocculant, and accelerating the formation of flocs. During rotation, the screen assembly picks up the flocs, gathering them on the front side of the screen assembly, and causing the gathered flocs to rotate in the wastewater. Under centrifugal force, the rotating flocs move in the direction away from the rotating shaft 5 and enter the collection cylinder 11 through the collection inlet 111.

[0052] During the rotation of the screen assembly, the transmission gear 20 first meshes with the inner arc-shaped rack 18, driving the transmission gear 20 to rotate in the forward direction, thereby driving the movable screen 23 to move upward through the transmission screw, and the movable screen 23 pushes the flocculent in the collection cylinder 11 upward. As the shaft 5 continues to rotate, when the transmission gear 20 rotates to the interval between the outer arc-shaped rack 19 and the inner arc-shaped rack 18, the movable screen plate 23 moves upward until it is flush with the bottom surface of the collection tray 10. All the flocculent material is squeezed into the collection tray 10. Since the transmission gear 20 is not engaged with either the inner arc-shaped rack 18 or the outer arc-shaped rack 19 at this time, the movable screen plate 23 will stay at this position for a period of time. At the same time, the movable screen plate 23 passes through the push plate 8 along with the collection cylinder 11. The push plate 8 pushes away the flocculent material accumulated directly above the movable screen plate 23. Then, the transmission gear 20 begins to engage with the outer arc-shaped rack 19 and begins to rotate in the opposite direction, driving the movable screen plate 23 to move downward. Since the flocculent material on the movable screen plate 23 has been pushed away by the push plate 8, the flocculent material directly above the movable screen plate 23 will not be carried back into the collection cylinder 11 by the movable screen plate 23.

[0053] To prevent blockage of the main mesh plate 22, when the mesh plate assembly rotates to the point where the pushing member 14 contacts the pushing member 7, the pushing member 7 pushes the pushing member 14 downward, causing the first secondary mesh plate to move downward. The mesh holes on the first and second secondary mesh plates are staggered vertically, forming a sealed solid plate. Then, as the pushing member 14 is pushed by the pushing member 7, the swing rod 13 rotates to contact the stop rod 9. The stop rod 9 pushes the swing rod 13 to rotate around the hinge point. The end of the swing rod 13 near the rotating shaft 5 pushes the connecting vertical rod 26, causing the two secondary mesh plates to move towards the main mesh plate 22. This pushes the liquid between the main mesh plate 22 and the two secondary mesh plates towards the main mesh plate 22, backflushing the main mesh plate 22 and flushing out the impurities stuck on the main mesh plate 22, thus solving the blockage problem.

[0054] This invention uses a mesh plate assembly to gather the flocs in the reaction tank 101 together and drive the flocs to rotate, so that the flocs enter the collection cylinder 11 under centrifugal force. Then, the movable mesh plate 23 pushes the flocs in the collection cylinder 11 upward, thereby discharging the flocs in the reaction tank 101 and avoiding the accumulation of flocs in the reaction tank 101 from affecting the efficiency of subsequent flocculation reactions.

[0055] In this embodiment, a stirring rod 6 is vertically connected to the rotating shaft 5. In other embodiments, the stirring rod 6 is not connected to the rotating shaft 5, and the liquid in the reaction tank 101 can be stirred by the rotation of the mesh plate assembly alone.

[0056] In this embodiment, the first sub-mesh plate, which is close to the main mesh plate 22, is mounted vertically on the mesh plate bracket. In other embodiments, the second sub-mesh plate, which is far from the main mesh plate 22, is mounted vertically on the mesh plate bracket.

[0057] In this embodiment, a pushing member 14 is connected to the top of the first sub-net plate, and a pushing member 7 is provided on the pool body 1. The pushing member 7 pushes the pushing member 14 downward, causing the first sub-net plate to move downward, thereby causing the mesh holes on the two sub-net plates to be staggered vertically. In other embodiments, a lifting drive member is provided on the net plate support, and the first sub-net plate is horizontally slidably connected to the drive output end of the lifting drive member. The lifting drive member drives the first sub-net plate to move up and down, thereby causing the mesh holes on the two sub-net plates to be staggered.

[0058] In this embodiment, the two auxiliary mesh plates are pushed towards the main mesh plate 22 by the cooperation of the stop rod 9 and the swing rod 13, thereby backflushing the main mesh plate 22 to remove impurities. In other embodiments, the mesh plate support is provided with a transverse drive, and the second auxiliary mesh plate is connected to the drive output end of the transverse drive. The transverse drive drives the second auxiliary mesh plate to move towards the main mesh plate 22, thereby backflushing the main mesh plate 22.

Claims

1. An industrial wastewater treatment device for the production of chromium acetylacetone, comprising a tank body, wherein a partition is provided within the tank body, the partition dividing the tank body into a reaction tank and a sedimentation tank, characterized in that, The reaction tank is equipped with a collection mechanism, which includes a rotating shaft, a screen assembly, and a collection cylinder. The rotating shaft extends vertically and is installed in the reaction tank around its central axis. The screen assembly is arranged vertically and connected to the outer wall of the rotating shaft. The collection cylinder extends vertically and is connected to the side of the screen assembly facing away from the rotating shaft. The outer wall of the collection cylinder is provided with a vertically extending collection inlet. The collection inlet is located on the side of the screen assembly that faces the flocculants during rotation and is arranged towards the rotating shaft. The rotating shaft can rotate to drive the screen assembly to pick up the flocs in the reaction tank, and make the flocs pass through the collection inlet and enter the inner cavity of the collection cylinder under centrifugal force; The top of the collecting cylinder is connected to a collecting tray, which is connected to the inner cavity of the collecting cylinder. The collecting tray is arranged above the liquid surface in the reaction tank. A movable screen plate is inserted into the collecting cylinder and moves up and down. The movable screen plate can move up and down in the collecting cylinder to push the flocs collected in the collecting cylinder upward into the collecting tray.

2. The industrial wastewater treatment device for chromium acetylacetone production according to claim 1, characterized in that, The screen assembly includes a screen support, a main screen mounted on the screen support and parallel to each other, and two auxiliary screens. The main screen is located on the side of the screen assembly facing the flocculants during rotation, and the two auxiliary screens are located on the side of the screen assembly facing away from the flocculants during rotation. The two auxiliary screens are close to each other and are slidably mounted on the screen support in a direction perpendicular to the main screen. One of the auxiliary screens can move vertically. Each auxiliary screen has multiple rows of mesh holes arranged at intervals in the vertical direction. The rows of mesh holes on the two auxiliary screens can be staggered vertically when the two auxiliary screens move relative to each other, so that the mesh holes on each auxiliary screen are blocked by the other auxiliary screen.

3. The industrial wastewater treatment device for acetylacetone chromium production according to claim 2, characterized in that, In the mesh panel assembly, the secondary mesh panel near the main mesh panel is slidably mounted on the mesh panel support in the vertical direction. A pushing component is connected to the secondary mesh panel, and a first elastic component that can extend and retract vertically is connected between the pushing component and the mesh panel support. A pushing component is provided on the pool body. When the pushing component rotates with the mesh panel assembly and comes into contact with the pushing component, it can be pushed by the pushing component and drive the corresponding secondary mesh panel to move up or down, so that the rows of mesh holes on the two secondary mesh panels are staggered.

4. The industrial wastewater treatment device for chromium acetylacetone production according to claim 3, characterized in that, A horizontally extending swing arm is provided on the collection cylinder. The swing arm is hinged to the collection cylinder and is located on the side of the screen assembly that faces away from the flocculants during rotation. The inner end of the swing arm is opposite to the screen assembly, and the outer end extends to the side of the collection cylinder that faces away from the screen assembly. A torsion spring is connected between the swing arm and the collection cylinder. When the torsion spring is in a free state, the inner end of the swing arm presses against the secondary screen plate in the screen assembly that is away from the main screen plate. A stop bar is provided in the reaction tank. The stop bar can contact the outer end of the swing arm after the pushing component is pushed by the pushing component, so as to actuate the swing arm to swing and drive the inner end of the swing arm to push the two secondary screen plates toward the main screen plate.

5. An industrial wastewater treatment device for acetylacetone chromium production according to any one of claims 1-4, characterized in that, A vertically extending drive screw is inserted through the collecting cylinder, and a movable screen plate is inserted inside the collecting cylinder to prevent rotation. The movable screen plate is spirally fitted onto the drive screw. The bottom end of the drive screw extends to the outside of the collecting cylinder and is coaxially connected to a drive gear. The bottom of the tank is provided with an outer arc-shaped rack and an inner arc-shaped rack arranged opposite each other and coaxially. The outer arc-shaped rack has meshing teeth on its outer side, and the inner arc-shaped rack has meshing teeth on its inner side. The outer diameter of the outer arc-shaped rack is smaller than the inner diameter of the inner arc-shaped rack. As the collecting cylinder rotates around the axis, the drive gear can mesh with the inner arc-shaped rack and the outer arc-shaped rack in sequence, so as to drive the drive gear to switch between forward and reverse rotation, thereby driving the movable screen plate to move up and down reciprocally inside the collecting cylinder.

6. The industrial wastewater treatment device for chromium acetylacetone production according to claim 5, characterized in that, The collection tray is ring-shaped and coaxial with the rotating shaft. The top of the collection tray is open, and the bottom of the collection tray is connected to a collection box that communicates with the inner cavity of the collection tray. A push plate is provided on the pool body, and the bottom end of the push plate is inserted into the inner cavity of the collection tray.

7. The industrial wastewater treatment device for chromium acetylacetone production according to claim 6, characterized in that, There is a gap between the outer arc-shaped rack and the inner arc-shaped rack, and the push plate is positioned vertically opposite the gap between the outer arc-shaped rack and the inner arc-shaped rack.

8. An industrial wastewater treatment device for acetylacetone chromium production according to any one of claims 1-4, characterized in that, A stirring rod is connected to the outside of the rotating shaft.

9. The industrial wastewater treatment device for chromium acetylacetone production according to claim 8, characterized in that, The stirring rods are arranged in two sets horizontally and symmetrically on the outside of the rotating shaft, and each set includes multiple stirring rods distributed at equal intervals.

10. An industrial wastewater treatment device for chromium acetylacetone production according to any one of claims 1-4, characterized in that, The mesh panel assembly is provided in two sets, and the two sets of mesh panel assemblies are distributed on the outside of the rotating shaft at a 180° interval.

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