Coagulating impurity filter for sewage treatment in the production of 2-chloronicotinic acid

Abstract

The present invention provides a coagulation impurity filter for sewage treatment in the production of 2-chloronicotinic acid, which comprises: a sedimentation tank, a housing and an outer shell. A horizontal plate, a first partition plate and a second partition plate are respectively fixedly installed inside the sedimentation tank. A diversion mechanism is rotatably connected inside the sedimentation tank. The housing and the outer shell are both fixedly connected to the outer wall of the sedimentation tank. A cleaning mechanism is arranged inside the housing. A slag discharging mechanism is arranged at the bottom of the sedimentation tank. A blocking mechanism is arranged inside the outer shell. A sweeping mechanism is arranged at the bottom of the mesh frame. And the inside of the outer shell is communicated with the inside of the sedimentation tank through a water pumping mechanism. This application uses the sedimentation tank for sewage transportation, and realizes the rapid discharge of impurities by the back-and-forth movement of the push plate. And by arranging a plurality of mesh frames, the sewage after sedimenting impurities can be filtered at multiple levels, and real-time cleaning is realized while the sewage is being transported. By opening the blocking mechanism and starting the water pumping mechanism, the treatment of the impurities collected at the filter screen can be realized, and real-time treatment can be carried out to ensure the high efficiency and stability of the filter operation.

Description

Technical Field

[0001] The present invention relates to a coagulation impurity filter for sewage treatment in the production of 2-chloronicotinic acid, belonging to the technical field of sewage treatment. Background Art

[0002] 2-Chloronicotinic acid, also known as 2-chloronicotinic acid, has the chemical name of 2-chloro-3-pyridinecarboxylic acid, with the molecular formula C6H4ClNO2, molecular weight: 157.55, and CAS number: 2942-59-8. Due to its special physiological activity, it is widely used as an intermediate for pesticides and pharmaceuticals, and can produce agricultural herbicides, insecticides, medical antibiotics, etc. 2-Chloronicotinic acid is mainly used in the highly effective herbicide flufenican and nicosulfuron; in the medical field, 2-chloronicotinic acid can be used in the synthesis of anti-AIDS drug nevirapine, antidepressant mirtazapine, anti-inflammatory analgesic flufenamic acid, and pranoprofen; in the veterinary field, there is the anti-inflammatory analgesic drug flunixin meglumine.

[0003] Currently, chlorination is often carried out on pyridine with a substituent at the 3-position, and then hydrolysis and acidification are carried out to obtain 2-chloronicotinic acid. Specifically, 3-cyanopyridine is oxidized in hydrogen peroxide and a catalyst at a certain temperature to generate N-oxide. Since the sewage generated in the production process contains a large amount of impurities such as phosphorus, salt, ammonia nitrogen, and COD, impurity filtration is usually carried out during coagulation precipitation. However, due to the different particle sizes of the impurities, they are likely to flow through simultaneously while being transported with the sewage, thereby affecting the sewage treatment effect. It is difficult to effectively filter the coagulation impurities during the sewage treatment process. Only through coagulation precipitation, it is difficult to ensure effective treatment. When treated in a filter, due to the long-term discharge of wastewater, the subsequent filtration effect becomes poor, and it will also affect the wastewater discharge efficiency, bringing inconvenience to subsequent operations and treatments. Moreover, more impurities are generated after filtration and are not easily cleaned effectively, affecting the use performance of the filter. Summary of the Invention

[0004] The present invention provides a coagulation impurity filter for sewage treatment in the production of 2-chloronicotinic acid in order to solve the technical problem of poor coagulation filtration effect of impurities in sewage during the production process of 2-chloronicotinic acid.

[0005] The present invention solves the above technical problems through the following technical solutions:

[0006] The present invention provides a coagulation impurity filter for sewage treatment in the production of 2-chloronicotinic acid, and the coagulation impurity filter for sewage treatment in the production of 2-chloronicotinic acid includes:

[0007] Sedimentation tank, in which a cross plate, a first partition board and a second partition board are fixedly installed respectively. The first partition board is fixedly installed at the top of one end of the cross plate. The tops of the first partition board and the second partition board are both fixedly connected to the top plate, and the top plate is fixedly connected to the top of the sedimentation tank. A diversion mechanism is rotatably connected inside the sedimentation tank and is located below the second partition board. One side of the first partition board is fixedly connected to the inner wall of the sedimentation tank through a wire mesh frame. The flow rate of the sewage transported in the sedimentation tank is controlled by the diversion mechanism, and the residence time of the sewage in the sedimentation tank is controlled according to the impurity content in the sewage and by using the diversion mechanism to ensure the effective coagulation and precipitation of impurities for removal;

[0008] A shell and an outer shell, both of which are fixedly connected to the outer wall of the sedimentation tank. A cleaning mechanism is provided inside the shell, and a slag discharging mechanism is provided at the bottom of the sedimentation tank below the cleaning mechanism. A plugging mechanism is provided inside the outer shell, and the plugging mechanism is correspondingly arranged on one side of the wire mesh frame. A sweeping mechanism is provided at the bottom of the wire mesh frame, and the inside of the outer shell is communicated with the inside of the sedimentation tank through a pumping mechanism. The bottom of the sedimentation tank can be cleaned in real time by the cleaning mechanism, the impurities are collected by the reciprocating movement of the cleaning mechanism, and through the linkage between the cleaning mechanism and the slag discharging mechanism, the impurities can be discharged through the slag discharging mechanism. The impurities can be discharged in real time during the sewage transportation process, and the sewage can be discharged up to the standard after being multi-stage filtered by the wire mesh frame. The collected impurities can be collected inside the outer shell by the plugging mechanism, and the separation of sewage and impurities can be realized through the pumping mechanism, which is convenient for the rapid cleaning of impurities, improves the effective precipitation and filtration of impurities in the sewage during the production process of 2-chloronicotinic acid, and improves the sewage treatment effect.

[0009] In this technical solution, the tops of both sides of the sedimentation tank are respectively fixedly connected to a liquid inlet pipe and a liquid outlet pipe. The bottom of the sedimentation tank is fixedly installed with support legs for the installation of the slag discharging mechanism. The first partition board and the second partition board are distributed in parallel. A reflux pump is fixedly installed on the top of the top plate. Both sides of the reflux pump are fixedly connected to reflux pipes. One of the reflux pipes extends into the sedimentation tank between the first partition board and the second partition board, and the other reflux pipe extends to the other side of the second partition board.

[0010] In this technical solution, the diversion mechanism includes spoiler plates, which are rotatably connected to the inside of the sedimentation tank. The number of spoiler plates is several and they are evenly distributed. Several spoiler plates are correspondingly arranged above the cross plate. A first motor is fixedly installed on the outer wall of the sedimentation tank, and the output end of the first motor is fixedly connected to one of the spoiler plates. The ends of several spoiler plates are all fixedly installed with turntables located outside the sedimentation tank, and adjacent two turntables are respectively rotatably connected to both ends of a connecting rod.

[0011] In this technical solution, the cross-section of the housing is a U-shaped structure and is connected to one side of the bottom of the sedimentation tank. The cleaning mechanism inside the housing includes a belt. Both ends of the belt are fixedly connected to both sides of the push plate. The push plate is slidably connected to the inside of the sedimentation tank. A driving wheel and several driven wheels are rotatably connected inside the housing. The belt is in contact with the surfaces of the driving wheel and the driven wheels. A second motor is fixedly installed on the top of the housing, and the output end of the second motor is fixedly connected to the driving wheel.

[0012] In this technical solution, the push plate is located below the cross plate. Both side surfaces of the push plate are inclined structures. The push plate is slidably connected to the bottom surface of the sedimentation tank. Two symmetrically distributed guide rails are fixedly connected to the inner wall of the sedimentation tank. Notches located on the surfaces of the guide rails are opened at both ends of the push plate. The push plate is correspondingly arranged between two slag discharge mechanisms. Both ends of the sedimentation tank are connected through the belt.

[0013] In this technical solution, the slag discharge mechanism includes a slag discharge pipe. The cross-section of the slag discharge pipe is a square hollow structure. The slag discharge pipe is fixedly installed on both sides of the bottom of the sedimentation tank. The slag discharge pipe is communicated with the slag discharge opening opened in the sedimentation tank. A guide plate is inserted through the side wall of the sedimentation tank on one side of the slag discharge opening. The guide plate is an L-shaped structure and is hermetically slidable with the sedimentation tank. A connecting plate is fixedly connected to the bottom of the guide plate, and a sealing gasket located below the slag discharge pipe is fixedly connected to the top of the connecting plate. L-shaped structures with cross-sections are fixedly connected to both sides of the connecting plate. The limiting plates are slidably connected to the inside of the notches opened on the outer wall of the slag discharge pipe. The slag discharge pipe is an inclined structure, and the slag discharge pipe is connected to the guide plate through a spring.

[0014] In this technical solution, several horizontally distributed mesh frames are arranged inside the sedimentation tank. Filter meshes with gradually increasing mesh numbers are respectively arranged in the middle of several mesh frames from bottom to top. A plugging mechanism is arranged on the side wall of the sedimentation tank on one side of the mesh frame. The plugging mechanism includes a sealing plate. The sealing plate is rotatably connected to the side wall of the sedimentation tank. The sealing plate is hermetically connected to the side wall of the sedimentation tank, and the sealing plate is hermetically attached to the side end of the mesh frame.

[0015] In this technical solution, the sweeping mechanism includes a brush roller. Both ends of the brush roller are rotatably connected to the inner walls of the sedimentation tank and the side plate respectively. The side plate is an L-shaped structure and is fixedly connected to the side end of the mesh frame. The number of the brush rollers is several. Meshing gears are fixedly connected to the ends of several brush rollers. One of the brush rollers is fixedly connected to a worm gear. A third motor is fixedly installed on the top of the side plate. The output end of the third motor is fixedly connected to a worm, and the worm is meshed with the worm gear.

[0016] In this technical solution, an electric push rod is fixedly installed at the top of the outer shell. The telescopic end of the electric push rod penetrates through the outer shell and is rotatably connected to one end of a resisting rod, and the other end of the resisting rod is rotatably connected to a sealing plate. The bottom of the outer shell is fixedly connected with a collecting pipe with a rotary cover. The collecting pipe is correspondingly arranged above one side of the resisting rod. The bottom end of the collecting pipe is movably sleeved with a movable rod. Both ends of the movable rod are fixedly connected with an upper plug and a lower plug respectively, and the lower plug is located inside the collecting pipe.

[0017] In this technical solution, the water pumping mechanism includes a water pump. The water pump is fixedly connected with a water outlet pipe and a water inlet pipe respectively. The water outlet pipe is located above the top plate. The water inlet pipe penetrates through the outer shell and extends to the bottom of the outer shell. The bottom of the water inlet pipe is fixedly connected with an end pipe. The end pipe and the collecting pipe are correspondingly distributed. The top diameter of the end pipe is larger than its bottom diameter. The inside of the end pipe is movably sleeved with the movable rod, and the upper plug at the top of the movable rod is in sealed sliding connection with the inner bottom end of the end pipe.

[0018] On the basis of conforming to the common knowledge in the field, the above-mentioned preferred conditions can be combined arbitrarily to obtain various preferred examples of the present invention.

[0019] The positive and progressive effects of the present invention are as follows:

[0020] The coagulation impurity filter for the sewage treatment of 2-chloronicotinic acid production proposed above uses a sedimentation tank for sewage transportation, realizes impurity precipitation through coagulation sedimentation, adjusts the sewage sedimentation time according to the impurity content and loss in the sewage, can be quickly adjusted according to actual needs, can effectively clean the precipitated impurities, avoids excessive impurities from affecting the sewage transportation efficiency, and realizes the real-time cleaning function while transporting the sewage. The back-and-forth movement of the push plate is used to quickly discharge the impurities, and by setting a plurality of mesh frames, the sewage after sedimenting the impurities can be filtered again to achieve the up-to-standard discharge of the sewage, and the real-time cleaning is realized while transporting the sewage, avoiding the problem that the sewage cannot be quickly discharged due to the blockage of the mesh holes by impurities. Through the opening of the blocking mechanism and the start of the water pumping mechanism, the treatment of the impurities collected at the filter screen can be realized, and the real-time treatment can be achieved to ensure the high efficiency and stability of the filter operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic perspective view of the whole of the present invention.

[0022] Figure 2 It is a schematic front view of the inside of the present invention.

[0023] Figure 3 For the present invention Figure 2 The partial enlarged schematic view of part A in it.

[0024] Figure 4Schematic diagram of the internal top view of the outer shell of the present invention.

[0025] Figure 5 Schematic diagram of the internal top view of the housing of the present invention.

[0026] Figure 6 Schematic diagram of the three-dimensional structure of the spoiler of the present invention.

[0027] Figure 7 Schematic diagram of the three-dimensional structure of the slag discharge pipe of the present invention.

[0028] Figure 8 Schematic diagram of the three-dimensional structure of the brush roller of the present invention.

[0029] Figure 9 Schematic diagram of the internal partial front view of the end pipe of the present invention.

[0030] Figure 10 Schematic diagram of the internal partial three-dimensional structure of the end pipe of the present invention.

[0031] Explanation of reference numerals

[0032] 101, sedimentation tank; 102, liquid inlet pipe; 103, support leg; 104, cross plate; 105, first partition; 106, second partition; 107, top plate; 108, reflux pump; 109, reflux pipe; 110, first motor; 111, spoiler; 112, turntable; 113, connecting rod; 114, liquid outlet pipe;

[0033] 201, housing; 202, second motor; 203, driving wheel; 204, driven wheel; 205, belt; 206, push plate; 207, guide rail;

[0034] 301, slag discharge pipe; 302, slag discharge port; 303, guide plate; 304, connecting plate; 305, gasket; 306, limiting plate; 307, spring;

[0035] 401, mesh frame; 402, brush roller; 403, side plate; 404, gear; 405, worm gear; 406, third motor; 407, worm;

[0036] 501, outer shell; 502, sealing plate; 503, electric push rod; 504, abutting rod; 505, collection pipe; 506, water pump; 507, water outlet pipe; 508, water inlet pipe; 509, end pipe; 510, movable rod; 511, upper plug; 512, lower plug. Detailed implementation manners

[0037] The present invention will be further described below by way of examples, but the present invention is not limited to the scope of the described examples.

[0038] AsFigures 1-10 As shown, the coagulation impurity filter for the sewage treatment in the production of 2-chloronicotinic acid comprises:

[0039] A sedimentation tank 101, in which a transverse plate 104, a first partition plate 105 and a second partition plate 106 are fixedly installed respectively. The first partition plate 105 is fixedly installed at the top of one end of the transverse plate 104. The tops of the first partition plate 105 and the second partition plate 106 are both fixedly connected to a top plate 107, and the top plate 107 is fixedly connected to the top of the sedimentation tank 101. A diversion mechanism is rotatably connected inside the sedimentation tank 101 and is located below the second partition plate 106. One side of the first partition plate 105 is fixedly connected to the inner wall of the sedimentation tank 101 through a wire frame 401. The first partition plate 105 can realize the guidance during the sewage transportation. The sewage entering from the liquid inlet pipe 102 enters the wire frame 401 from below the sedimentation tank 101 and is then discharged through the liquid outlet pipe 114. The second partition plate 106 is used to realize the transportation of the sewage on both sides thereof, so that the sewage can stay in the sedimentation tank 101, fully mix with medicaments such as flocculants, and the rotation of the turbulence plate 111 can adjust the sewage flow direction, which can be appropriately adjusted according to actual needs.

[0040] A housing 201 and an outer shell 501, both of which are fixedly connected to the outer wall of the sedimentation tank 101. A cleaning mechanism is arranged inside the housing 201. A slag discharging mechanism is arranged at the bottom of the sedimentation tank 101 below the cleaning mechanism. A plugging mechanism is arranged inside the outer shell 501, and the plugging mechanism is correspondingly arranged on one side of the wire frame 401. A sweeping mechanism is arranged at the bottom of the wire frame 401, and the inside of the outer shell 501 is communicated with the inside of the sedimentation tank 101 through a pumping mechanism.

[0041] In this technical solution, the top parts on both sides of the sedimentation tank 101 are fixedly connected to the liquid inlet pipe 102 and the liquid outlet pipe 114 respectively. The bottom of the sedimentation tank 101 is fixedly installed with legs 103 for installing the slag discharging mechanism. The first partition plate 105 and the second partition plate 106 are distributed in parallel. The top of the top plate 107 is fixedly installed with a reflux pump 108. Both sides of the reflux pump 108 are fixedly connected to the reflux pipes 109. One of the reflux pipes 109 extends into the sedimentation tank 101 between the first partition plate 105 and the second partition plate 106, and the other reflux pipe 109 extends to the other side of the second partition plate 106. The sewage is conveyed into the sedimentation tank 101 from the liquid inlet pipe 102 after being catalyzed. The impurities contained in it are coagulated and precipitated in the sedimentation tank 101 and are discharged up to standard from the liquid outlet pipe 114. The sewage is conveyed upward from the bottom of the sedimentation tank 101 through the first partition plate 105, and the sewage is conveyed on both sides of the first partition plate 105. When the sedimentation tank 101 enters one side of the second partition plate 106, the sewage between the second partition plate 106 and the first partition plate 105 is circulated and conveyed through the reflux pipe 109, which is adjusted according to the impurity content and the conveying efficiency in the sewage, so that the sewage stays in the sedimentation tank 101 for the same time to ensure its smooth adsorption and precipitation.

[0042] In this technical solution, the diversion mechanism includes a spoiler 111. The spoiler 111 is rotatably connected to the inside of the sedimentation tank 101. The number of the spoilers 111 is several and they are evenly distributed with each other. Several spoilers 111 are correspondingly arranged above the cross plate 104. A first motor 110 is fixedly installed on the outer wall of the sedimentation tank 101. The output end of the first motor 110 is fixedly connected to one of the spoilers 111. The ends of several spoilers 111 are all fixedly installed with turntables 112 located outside the sedimentation tank 101. Adjacent two of the turntables 112 are respectively rotatably connected to both ends of a connecting rod 113. When the spoiler 111 is rotated electrically by the first motor 110, the spoiler 111 drives the turntable 112 to rotate synchronously, so that the transmission of the connecting rod 113 drives multiple turntables 112 to rotate synchronously. The angle of the spoiler 111 is adjusted by rotating the turntable 112 by a certain angle, so that the sewage entering the sedimentation tank 101 is guided by the spoiler 111. As Figure 2 shown, the spoiler 111 tends to be in a vertical state, and most of the sewage enters the wire frame 401 from below the cross plate 104. When the spoiler 111 rotates to a state tending to be horizontal, the downward flow rate of the sewage decreases at this time, and the reflux pump 108 is started, so that the sewage between the first partition plate 105 and the second partition plate 106 is conveyed back and forth through the reflux pipe 109 to improve the impurity precipitation effect.

[0043] In this technical solution, the cross-section of the housing 201 is a U-shaped structure and is connected to one side of the bottom of the sedimentation tank 101. The cleaning mechanism inside the housing 201 includes a belt 205. Both ends of the belt 205 are fixedly connected to both sides of the push plate 206. The push plate 206 is slidably connected to the inside of the sedimentation tank 101. A driving wheel 203 and a plurality of driven wheels 204 are rotatably connected inside the housing 201. The belt 205 is in contact with the surfaces of the driving wheel 203 and the driven wheels 204. A second motor 202 is fixedly installed on the top of the housing 201, and the output end of the second motor 202 is fixedly connected to the driving wheel 203. After long-term sedimentation, impurities stay at the bottom of the sedimentation tank 101. At this time, the second motor 202 is started. The second motor 202 drives the driving wheel 203 and the driven wheels 204 to rotate synchronously. When the belt 205 drives the push plate 206 to move, the push plate 206 pushes the impurities to one side of the sedimentation tank 101.

[0044] In this technical solution, the push plate 206 is located below the cross plate 104. Both side surfaces of the push plate 206 are inclined structures. The push plate 206 is slidably connected to the bottom surface of the sedimentation tank 101. Two symmetrically distributed guide rails 207 are fixedly connected to the inner wall of the sedimentation tank 101. Notches located on the surfaces of the guide rails 207 are opened at both ends of the push plate 206. The push plate 206 is correspondingly arranged between two slag discharging mechanisms. Both ends of the sedimentation tank 101 are connected through the belt 205. By providing the guide rails 207, stable movement of the push plate 206 can be achieved, enabling the belt 205 to pull the push plate 206 to move at the bottom of the sedimentation tank 101. The impurities are pushed into the slag discharging pipe 301 through the inclined slopes on both sides of the push plate 206. The provision of the housing 201 can avoid the problem of sewage leakage. Even if part of the sewage enters the inside of the housing 201 through the gap at the connection between the sedimentation tank 101 and the belt 205, it will not cause the problem of sewage leakage.

[0045] In this technical solution, the slag discharging mechanism includes a slag discharging pipe 301. The cross-section of the slag discharging pipe 301 is a square hollow structure. The slag discharging pipe 301 is fixedly installed on both sides of the bottom of the sedimentation tank 101. The slag discharging pipe 301 is communicated with a slag discharging port 302 opened in the sedimentation tank 101. A guide plate 303 is inserted through the side wall of the sedimentation tank 101 on one side of the slag discharging port 302. The guide plate 303 is an L-shaped structure and is hermetically slidable with the sedimentation tank 101. When the push plate 206 moves, it first pushes the impurities to fall from the slag discharging port 302 into the interior of the slag discharging pipe 301. When the push plate 206 completely moves above the slag discharging port 302, the push plate 206 then contacts the guide plate 303. During the process of the push plate 206 pushing the guide plate 303 to move, the push plate 206 is always located above the slag discharging port 302. A connecting plate 304 is fixedly connected to the bottom of the guide plate 303, and a sealing gasket 305 located below the slag discharging pipe 301 is fixedly connected to the top of the connecting plate 304. Limiting plates 306 with an L-shaped cross-section are fixedly connected to both sides of the connecting plate 304. The limiting plates 306 are slidably connected to the interior of a notch opened on the outer wall of the slag discharging pipe 301. The slag discharging pipe 301 is an inclined structure, and the slag discharging pipe 301 is connected to the guide plate 303 through a spring 307. When the push plate 206 pushes the impurities to move to one side, the impurities fall into the slag discharging pipe 301. After the push plate 206 passes through the top of the slag discharging port 302 and closes it, the push plate 206 contacts the guide plate 303 and pushes the guide plate 303 and the connecting plate 304 to translate. The movement of the connecting plate 304 is realized through the cooperation of the limiting plates 306 and the slag discharging pipe 301, so that the bottom of the slag discharging pipe 301 is opened, and the impurities located inside the slag discharging pipe 301 are discharged. When the push plate 206 moves to the other side, the spring 307 causes the guide plate 303 to reset. At this time, after the sealing gasket 305 plugs the bottom of the slag discharging pipe 301, the push plate 206 then leaves above the slag discharging port 302, and the impurities are pushed into the slag discharging pipe 301 on the other side.

[0046] In this technical solution, a number of horizontally distributed mesh frames 401 are provided inside the sedimentation tank 101. Filter meshes with gradually increasing mesh numbers are respectively provided in the middle of the number of mesh frames 401 from bottom to top. A plugging mechanism is provided on the side wall of the sedimentation tank 101 on one side of the mesh frame 401. The plugging mechanism includes a sealing plate 502. The sealing plate 502 is rotatably connected to the side wall of the sedimentation tank 101. The sealing plate 502 is hermetically connected to the side wall of the sedimentation tank 101, and the sealing plate 502 is hermetically attached to the side end of the mesh frame 401. The mesh frame 401 is used for the installation of the filter mesh to realize the multi-stage filtration of impurities, and impurities with different particle sizes can be concentrated below the corresponding mesh frame 401.

[0047] In this technical solution, the sweeping brush mechanism includes a brush roller 402. Both ends of the brush roller 402 are rotatably connected to the inner wall of the sedimentation tank 101 and the side plate 403 respectively. The side plate 403 is of an L-shaped structure and is fixedly connected to the side end of the mesh frame 401. The side plate 403 is installed between the first partition 105 and the sedimentation tank 101, which enables the installation of the gear 404 and the worm gear 405. At the same time, the third motor 406 is installed on the top of the side plate 403, so that the worm 407 can rotate stably on one side of the side plate 403. The number of the brush rollers 402 is several. Meshing gears 404 are fixedly connected to the ends of several brush rollers 402. One of the brush rollers 402 is fixedly connected to the worm gear 405. The third motor 406 is fixedly installed on the top of the side plate 403. The output end of the third motor 406 is fixedly connected to the worm 407, and the worm 407 is meshed with the worm gear 405. When the third motor 406 on the top of the side plate 403 is started, one of the gears 404 and the brush roller 402 are driven to rotate through the cooperation of the worm 407 and the worm gear 405. The reverse synchronous rotation of multiple brush rollers 402 is realized through the meshing of multiple gears 404, so as to clean the bottom of the mesh frame 401 and avoid blockage problems.

[0048] In this technical solution, an electric push rod 503 is fixedly installed on the top of the outer shell 501. The telescopic end of the electric push rod 503 penetrates through the outer shell 501 and is rotatably connected to one end of the abutting rod 504, and the other end of the abutting rod 504 is rotatably connected to the sealing plate 502. The bottom of the outer shell 501 is fixedly connected with a collecting pipe 505 with a rotary cover. The collecting pipe 505 is correspondingly arranged above one side of the abutting rod 504. The bottom end of the collecting pipe 505 is movably sleeved with a movable rod 510. Both ends of the movable rod 510 are fixedly connected with an upper plug 511 and a lower plug 512 respectively, and the lower plug 512 is located inside the collecting pipe 505. When the electric push rod 503 shortens, it drives the abutting rod 504 to rotate, so that the abutting rod 504 pulls the sealing plate 502 to rotate, enabling the sewage at the mesh frame 401 to carry the collected impurities into the inner part of the outer shell 501. Then, when the electric push rod 503 extends, it drives the abutting rod 504 and the sealing plate 502 to reset. When the sealing plate 502 seals the sedimentation tank 101 on one side of the mesh frame 401, the abutting rod 504 abuts against the inner wall of the outer shell 501 to achieve limit, so that the collected impurities fall into the collecting pipe 505 for storage.

[0049] In this technical solution, the pumping mechanism includes a water pump 506, which is fixedly connected to a water outlet pipe 507 and a water inlet pipe 508 respectively. The water outlet pipe 507 is located above the top plate 107. The water inlet pipe 508 penetrates through the housing 501 and extends to the bottom of the housing 501. A terminal pipe 509 is fixedly connected to the bottom of the water inlet pipe 508. The terminal pipe 509 and the collection pipe 505 are correspondingly distributed. The diameter of the top of the terminal pipe 509 is larger than that of its bottom. The inside of the terminal pipe 509 is movably sleeved with a movable rod 510, and the upper plug block at the top of the movable rod 510 seals and slides inside the bottom end of the terminal pipe 509. When the sealing plate 502 is opened and then closed, the water pump 506 is started. At this time, a negative pressure is formed inside the water inlet pipe 508, causing the upper plug block 511 to move upward from the bottom of the terminal pipe 509 to the top of the terminal pipe 509. At this time, the air flow inside the terminal pipe 509 is unblocked. When the upper plug block 511 is located above the terminal pipe 509, the lower plug block 512 is driven by the movable rod 510 to block the top of the collection pipe 505. At this time, the sewage inside the housing 501 enters from the terminal pipe 509 and is re-transported to the sedimentation tank 101 through the water inlet pipe 508 and the water outlet pipe 507 for coagulation sedimentation. After the operation is completed, the screw cap at the bottom of the collection pipe 505 is unscrewed to discharge the solid impurities. At this time, the lower plug block 512 falls due to its own weight, opening the top of the collection pipe 505, and the upper plug block 511 moves below the terminal pipe 509, causing the impurities in the sewage inside the housing 501 to precipitate and be stored in the collection pipe 505, so that the precipitated impurities will not enter the inside of the housing 501 during sewage pumping, facilitating subsequent treatment of the impurities.

[0050] The present invention is not limited to the above embodiments. No matter what changes are made in its shape or structure, they all fall within the protection scope of the present invention. The protection scope of the present invention is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principle and essence of the present invention, but these changes and modifications all fall within the protection scope of the present invention.

Claims

1. A coagulation impurity filter for treating wastewater produced by 2-chloronicotinic acid, characterized in that: The coagulation impurity filter for 2-chloronicotinic acid production wastewater treatment comprises: A sedimentation tank (101), wherein a transverse plate (104), a first baffle (105) and a second baffle (106) are fixedly installed inside the sedimentation tank (101), the first baffle (105) is fixedly installed to the top of one end of the transverse plate (104), the tops of the first baffle (105) and the second baffle (106) are fixedly connected to a top plate (107), and the top plate (107) is fixedly connected to the top of the sedimentation tank (101), a flow guide mechanism located below the second baffle (106) is rotatably connected inside the sedimentation tank (101), and one side of the first baffle (105) is fixedly connected to the inner wall of the sedimentation tank (101) through a mesh frame (401); A shell (201) and an outer shell (501), wherein the shell (201) and the outer shell (501) are both fixedly connected to the outer wall of the sedimentation tank (101), a cleaning mechanism is provided inside the shell (201), a slag discharge mechanism is provided at the bottom of the sedimentation tank (101) below the cleaning mechanism, a blocking mechanism is provided inside the outer shell (501), and the blocking mechanism is correspondingly arranged on one side of the mesh frame (401), a sweeping mechanism is provided at the bottom of the mesh frame (401), and the interior of the outer shell (501) is connected to the interior of the sedimentation tank (101) via a pumping mechanism; A collecting tube (505) with a screw cap is fixedly connected to the bottom of the housing (501); the bottom end of the collecting tube (505) is movably sleeved with a movable rod (510); both ends of the movable rod (510) are respectively fixedly connected to an upper blocking block (511) and a lower blocking block (512); and the lower blocking block (512) is located inside the collecting tube (505); The pumping mechanism comprises a pump (506), wherein the pump (506) is fixedly connected to a water outlet pipe (507) and a water inlet pipe (508), respectively; the water outlet pipe (507) is located above the top plate (107); the water inlet pipe (508) penetrates the outer shell (501) and extends to the bottom of the outer shell (501); an end pipe (509) is fixedly connected to the bottom of the water inlet pipe (508); the end pipe (509) is distributed correspondingly to the collecting pipe (505); the top diameter of the end pipe (509) is larger than the bottom diameter; the inside of the end pipe (509) is movably sleeved with a movable rod (510); and an upper block at the top of the movable rod (510) is sealed and slidable with the bottom of the end pipe (509).

2. The coagulation impurity filter for treating 2-chloronicotinic acid production wastewater according to claim 1, characterized in that: The tops of both sides of the sedimentation tank (101) are fixedly connected to the liquid inlet pipe (102) and the liquid outlet pipe (114) respectively; the bottom of the sedimentation tank (101) is fixedly installed with supporting legs (103) for installing a slag discharge mechanism; the first baffle (105) and the second baffle (106) are arranged in parallel; a reflux pump (108) is fixedly installed on the top of the top plate (107); both sides of the reflux pump (108) are fixedly connected to reflux pipes (109); one reflux pipe (109) extends to the inside of the sedimentation tank (101) between the first baffle (105) and the second baffle (106); and the other reflux pipe (109) extends to the other side of the second baffle (106).

3. The coagulation impurity filter for treating 2-chloronicotinic acid production wastewater according to claim 1, characterized in that: The flow guiding mechanism comprises a spoiler (111), wherein the spoiler (111) is rotatably connected to the inside of the sedimentation tank (101), the number of the spoilers (111) is multiple and evenly distributed, and the multiple spoilers (111) are correspondingly arranged above the transverse plate (104), a first motor (110) is fixedly mounted on the outer wall of the sedimentation tank (101), an output end of the first motor (110) is fixedly connected to one of the spoilers (111), and a rotating disk (112) located outside the sedimentation tank (101) is fixedly mounted at the ends of the multiple spoilers (111), and two adjacent rotating disks (112) are rotatably connected to two ends of a connecting rod (113) respectively.

4. The coagulation impurity filter for treating 2-chloronicotinic acid production wastewater according to claim 1, characterized in that: The shell (201) has a U-shaped cross-section and is connected to one side of the bottom of the sedimentation tank (101). The cleaning mechanism inside the shell (201) comprises a belt (205). Two ends of the belt (205) are respectively fixedly connected to two sides of a push plate (206). The push plate (206) is slidably connected to the inside of the sedimentation tank (101). A driving wheel (203) and a plurality of driven wheels (204) are rotatably connected inside the shell (201). The belt (205) is in contact with the surfaces of the driving wheel (203) and the driven wheels (204). A second motor (202) is fixedly mounted on the top of the shell (201), and an output end of the second motor (202) is fixedly connected to the driving wheel (203).

5. The coagulation impurity filter for treating 2-chloronicotinic acid production wastewater according to claim 4, characterized in that: The push plate (206) is located below the transverse plate (104). Both side surfaces of the push plate (206) are inclined structures. The push plate (206) is slidably connected to the bottom surface of the sedimentation tank (101). Two symmetrically distributed guide rails (207) are fixedly connected to the inner wall of the sedimentation tank (101). Notches are provided at both ends of the push plate (206) on the surface of the guide rails (207). The push plate (206) is correspondingly arranged between the two slag discharge mechanisms. Both ends of the sedimentation tank (101) are connected to the belt (205).

6. The coagulation impurity filter for treating 2-chloronicotinic acid production wastewater according to claim 1, characterized in that: The slag discharge mechanism comprises a slag discharge pipe (301), the cross section of the slag discharge pipe (301) is a square hollow structure, the slag discharge pipe (301) is fixedly installed to the two sides of the bottom of the sedimentation tank (101), the slag discharge pipe (301) is connected to the slag discharge port (302) opened in the sedimentation tank (101), and a guide plate (303) is inserted through the side wall of the sedimentation tank (101) located on the side of the slag discharge port (302), the guide plate (303) is an L-shaped structure and is sealed and slidable with the sedimentation tank (101), and the guide plate (303) is connected to the sedimentation tank (101). 3) A connecting plate (304) is fixedly connected to the bottom, and a sealing gasket (305) located below the slag discharge pipe (301) is fixedly connected to the top of the connecting plate (304), and limiting plates (306) with an L-shaped cross-section are fixedly connected to both sides of the connecting plate (304), and the limiting plates (306) are slidably connected to the inside of a notch opened on the outer wall of the slag discharge pipe (301), and the slag discharge pipe (301) is an inclined structure, and the slag discharge pipe (301) is connected to the guide plate (303) via a spring (307).

7. The coagulation impurity filter for treating 2-chloronicotinic acid production wastewater according to claim 1, characterized in that: A plurality of horizontally distributed mesh frames (401) are provided inside the sedimentation tank (101), and filter screens with gradually increasing mesh sizes are provided in the middle of the plurality of mesh frames (401) from bottom to top. A sealing mechanism is provided on the side wall of the sedimentation tank (101) on one side of the mesh frame (401), and the sealing mechanism comprises a sealing plate (502), the sealing plate (502) is rotatably connected to the side wall of the sedimentation tank (101), the sealing plate (502) is sealedly connected to the side wall of the sedimentation tank (101), and the sealing plate (502) is sealedly fitted to the side end of the mesh frame (401).

8. The coagulation impurity filter for treating 2-chloronicotinic acid production wastewater according to claim 1, characterized in that: The sweeping mechanism comprises a brush roller (402), the two ends of which are rotatably connected to the sedimentation tank (101) and the inner wall of the side plate (403), respectively; the side plate (403) is an L-shaped structure and is fixedly connected to the side end of the mesh frame (401); there are a plurality of brush rollers (402), the ends of which are fixedly connected to mutually meshing gears (404), one of which is fixedly connected to a worm gear (405); a third motor (406) is fixedly mounted on the top of the side plate (403); the output end of the third motor (406) is fixedly connected to a worm (407), and the worm (407) is meshingly connected to the worm gear (405).

9. The coagulation impurity filter for treating 2-chloronicotinic acid production wastewater according to claim 1, characterized in that: An electric push rod (503) is fixedly mounted on the top of the housing (501); the telescopic end of the electric push rod (503) passes through the housing (501) and is rotatably connected to one end of a push rod (504); the other end of the push rod (504) is rotatably connected to the sealing plate (502); and the collecting pipe (505) is correspondingly arranged above one side of the push rod (504).

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