Pharmaceutical sewage treatment process and filtering equipment thereof

Abstract

The invention belongs to the technical field of wastewater treatment, and particularly relates to a pharmaceutical sewage treatment process and filtering equipment thereof, and the pharmaceutical sewage treatment process comprises the following steps: S1, pharmaceutical sewage enters a sewage station through a sewage pipe network, most floating matters and large-particle suspended matters in the sewage are removed by the filtering equipment, and the sewage is discharged into a water collecting well, a filter plate is fixedly connected to the interior of the filter, a filter groove is formed in the filter plate, a limiting plate is fixedly connected to the upper surface of the filter plate, a moving plate is slidably arranged on one side of the limiting plate, a first scraper is fixedly connected to the lower surface of the moving plate, and a second scraper is slidably connected to one side of the first scraper; outlet water of the sedimentation tank is filtered through the membrane assembly with the micron aperture, it is guaranteed that suspended solids of the outlet water reach the standard, the outlet water is clear, and 99% of escherichia coli can be removed while the suspended solids are removed.

Description

Technical Field

[0001] The invention belongs to the technical field of wastewater treatment, in particular to a pharmaceutical wastewater treatment process and filtering equipment thereof. Background Art

[0002] Traditional Chinese medicine pharmaceutical enterprises will generate wastewater in many links of production, mainly including medicinal material cleaning wastewater, decoction wastewater, extraction wastewater, equipment cleaning wastewater, and preparation production wastewater; cleaning wastewater is the initial treatment stage of medicinal materials, which needs to be cleaned to remove surface soil, sand and other impurities; the wastewater contains a large amount of suspended matter, animal and vegetable oils and other impurities. Decoction wastewater is the process of decoction of medicinal materials, in which the active ingredients of medicinal materials are dissolved in water, and a large amount of wastewater is generated at the same time. The wastewater contains high concentrations of organic matter, such as sugars, organic acids, proteins, cellulose, lignin, etc. Extraction wastewater is generated during the extraction process of medicinal materials, such as Salvia miltiorrhiza, Toad Venom, etc., when solvents (usually water or ethanol, etc.) are used to extract the active ingredients of medicinal materials. The wastewater generated after extraction contains extraction residues. Equipment cleaning wastewater is the wastewater generated by cleaning production equipment, pipes and containers before and after use to remove residual medicinal material components and pollutants. This part of wastewater contains a certain amount of organic and inorganic matter. Preparation production wastewater is wastewater containing drug ingredients generated when the final products, such as tablets, pills, capsules, etc., are made; this part of wastewater contains drug ingredients and their metabolites.

[0003] The pharmaceutical wastewater generated by traditional Chinese medicine pharmaceutical companies has a complex composition and contains a large amount of organic matter, inorganic matter, residual drugs and other substances. If these substances are discharged directly into the environment without treatment, they will cause serious pollution to water, soil and air, destroy the ecological balance, and affect the survival and reproduction of animals and plants.

[0004] A patent application with publication number CN115259455B discloses a pharmaceutical wastewater treatment device and a treatment process thereof, comprising a sliding frame fixedly connected to the top wall of the filter screen and a mounting frame slidably connected to the outer wall of the sliding frame, wherein a cleaning brush is fixedly connected to the bottom wall of the mounting frame;

[0005] When the pharmaceutical wastewater treatment device treats the filter plate, the cleaning brush reciprocates on the filter screen, thereby achieving a cleaning operation on the top of the filter screen.

[0006] When the above-mentioned pharmaceutical wastewater treatment device uses a brush to reciprocate on the filter and clean the impurities on the filter, since the sewage carries impurities through the filter all the time, the brush drives the impurities that are re-attached to the filter to perform a reset operation when it is reset. The impurities will therefore accumulate and clog the surface of the filter, causing the filter to be clogged, thereby reducing the flow of sewage through the filter, thereby causing the problem of reduced sewage treatment efficiency, and the impurities will cause the filter holes to be clogged, thereby affecting the normal use of the filter.

[0007] To this end, the present invention provides a pharmaceutical sewage treatment process and its filtration equipment. Summary of the Invention

[0008] In order to make up for the deficiencies of the prior art and solve at least one of the technical problems presented in the background art.

[0009] The technical solution adopted by the present invention to solve its technical problems is as follows: A pharmaceutical sewage treatment process according to the present invention includes the following steps:

[0010] S1. The pharmaceutical sewage enters the sewage station through the sewage pipe network, and most of the floating substances and large particle suspended matters in the sewage are removed by the filtration equipment and discharged into the sump. The filtration equipment includes a filter, inside which a filter plate is fixedly connected. A filtration tank is arranged inside the filter plate. A limiting plate is fixedly connected to the upper surface of the filter plate. A moving plate is slidably arranged on one side of the limiting plate. A first scraper is fixedly connected to the lower surface of the moving plate. A second scraper is slidably connected to one side of the first scraper;

[0011] S2. The collected wastewater is introduced into the regulation tank by a pump, and the wastewater is evenly mixed by the stirring device in the regulation tank. While stirring, compressed air is introduced into the regulation tank, and the air is evenly dispersed into the wastewater by means of a perforated pipe, an aeration head, etc.;

[0012] S3. The aerated sewage is introduced into the hydrolysis acidification tank by a lift pump. High-efficiency fillers are installed in the hydrolysis acidification tank, and hydrolysis acidification bacteria attach to the fillers and grow, decomposing high-molecular organic substances into low-molecular organic substances;

[0013] S4. The wastewater after hydrolysis acidification enters the aerobic aeration tank. Through the aerobic microorganisms in the activated sludge inside the aerobic aeration tank, the organic pollutants in the sewage are further oxidized and degraded, and the organic pollutants in the sewage are transformed into carbon dioxide and water harmless to the environment;

[0014] S5. The sewage treated by the aerobic aeration tank enters the intermediate sedimentation tank. The intermediate sedimentation tank separates the mud-water mixture treated by the aerobic tank. After the sewage is biologically treated, a large amount of activated sludge is contained in the effluent. At this time, the sewage enters the intermediate sedimentation tank for solid-liquid separation. Part of the settled sludge flows back to the anaerobic tank to maintain the sludge concentration of the system, and part of the surplus sludge is discharged into the sludge tank;

[0015] S6. The sewage enters the anaerobic tank A from the intermediate sedimentation tank. The function of this section is to greatly degrade the organic pollutants in the water through the decomposition of anaerobic bacteria. At the same time, the refractory high-molecular organic substances in the water are decomposed into easily biodegradable low-molecular organic substances through the action of anaerobic bacteria, improving the biochemical degradation ability of the subsequent line;

[0016] S7. The sewage enters anaerobic pond B from anaerobic pond A. A small aeration system is installed at the bottom of anaerobic pond B. Through aeration, the activated sludge can come into more sufficient contact with the water, enabling the organic matter and nitrification return liquid to remove the ammonia-containing pollutants through denitrification by converting them into nitrogen gas.

[0017] S8. The sewage enters the aerobic pond from anaerobic pond B. Through the aerobic microorganisms in the activated sludge inside the aerobic pond, the organic pollutants in the sewage are further oxidized and degraded, turning the organic pollutants in the sewage into carbon dioxide and water harmless to the environment. The ammonia nitrogen and organic nitrogen compounds in the sewage are oxidized into nitrates, forming a nitrification-denitrification system with the denitrification in anaerobic pond B. Meanwhile, the polyphosphate-accumulating organisms absorb excessive phosphorus in the sewage to achieve the purpose of biological phosphorus removal.

[0018] S9. The sewage enters the sedimentation tank from the aerobic pond. The sedimentation tank separates the mud-water mixture treated by the aerobic pond. After the sewage treatment, a large amount of activated sludge is contained in the effluent. At this time, the sewage enters the sedimentation tank for liquid separation. A part of the precipitated sludge flows back to the anaerobic pond to maintain the sludge concentration of the system, and a part of the surplus sludge is discharged into the sludge thickening tank. Lime is added to the sludge discharged into the sludge thickening tank for disinfection treatment, and then it is regularly pumped away by a fecal suction truck.

[0019] S10. The sewage enters the membrane filtration tank from the sedimentation tank. The sewage passes through the hollow fiber membrane in the membrane filtration tank, filtering out the fine suspended solids and pathogens such as 99% of Escherichia coli in the water through the membrane pores to ensure that the effluent meets the discharge standards.

[0020] S11. The sewage enters the ozone oxidation tank from the membrane filtration tank. Ozone agent is added to the sewage for decolorization and disinfection together.

[0021] S12. After disinfection is completed, the effluent meets the standards for reuse.

[0022] Furthermore, a water inlet pipe is fixedly connected to the upper surface of the filter, and a drain pipe is fixedly connected to the side of the filter. A first limiting groove is arranged inside the limiting plate, and one side of the first limiting groove is slidably connected to the moving plate. A second limiting groove is arranged inside the limiting plate, and one side of the second scraping plate is slidably connected to the inside of the second limiting groove. By driving the first scraping plate to move, the first scraping plate drives the second scraping plate to slide synchronously on the filter plate. The first scraping plate and the second scraping plate clean the impurities on the surface of the filter plate. At the same time, when the first scraping plate slides in the first limiting groove, the filter groove can also be dredged.

[0023] Furthermore, a sliding rod is fixedly connected to the upper surface of the moving plate. A moving frame is slidably connected to the surface of the sliding rod. A reciprocating lead screw is threadedly connected to the inside of the moving frame. One end of the reciprocating lead screw is rotatably connected to the inner wall of the filter. A spring is fixedly connected between the moving plate and the moving frame.

[0024] Further, a fixing frame is fixedly connected to one side of the limiting plate. The reciprocating lead screw is rotatably connected to the inner wall of the fixing frame. A motor is fixedly connected to one side of the filter. The output end of the motor is fixedly connected to one end of the reciprocating lead screw. Belt pulleys are fixedly connected to one ends of the reciprocating lead screws. The two belt pulleys are connected by a belt in a transmission manner.

[0025] Further, first limiting rods are rotatably connected to both sides of the moving plate. The first limiting rods are slidably connected to the inner walls of the first limiting grooves. Second limiting rods are rotatably connected to both sides of the second scraper. The second limiting rods are slidably connected to the inner walls of the second limiting grooves.

[0026] Further, a positioning groove is arranged inside the second scraper. A positioning rod is slidably connected to the inside of the positioning groove. The positioning rod is fixedly connected to the inner wall of the first scraper.

[0027] Further, the first limiting groove includes an initial section. A dredging section is arranged on one side of the initial section. A material pushing section is arranged at one end of the dredging section. A first rising section is arranged on one side of the material pushing section. A first reset section is arranged on one side of the first rising section. The second limiting groove includes a fitting section. A second rising section is arranged on one side of the fitting section. A second reset section is arranged on one side of the second rising section.

[0028] Further, a conical head is fixedly connected to one end of the first scraper. A convex block is fixedly connected to the inside of the dredging section. The size of the first scraper matches the size of the filter groove. The cross-sectional shape of the filter groove is an isosceles trapezoid.

[0029] Further, an inclined plate is fixedly connected to the upper surface of the filter plate. A sealing plate is rotatably connected to the outside of the filter.

[0030] Further, a mixing pipe is fixedly connected to the inside of the filter. A spiral blade is fixedly connected to the inside of the mixing pipe. A medicine adding tank is fixedly connected to the upper surface of the filter. An electromagnetic valve is fixedly connected between the medicine adding tank and the inner wall of the filter plate.

[0031] The beneficial effects of the present invention are as follows:

[0032] The present invention operates automatically and is simple to operate. The COD, ammonia nitrogen and total phosphorus pollutants in the sewage are stably removed through the biochemical combination process. The effluent from the sedimentation tank is filtered through a membrane module with a pore size of 0.1 micrometer to ensure that the suspended solids in the effluent meet the standards. The effluent is clear. While removing the suspended solids, 99% of Escherichia coli can also be removed. The ozone decolorization and disinfection technology is adopted, with high decolorization efficiency, no need to add decolorizing agents, and no secondary pollution is generated;

[0033] In the present invention, a first scraper and a second scraper are provided. When the first scraper is driven to move, the first scraper drives the second scraper to move synchronously through a positioning rod. The first scraper and the second scraper contact the upper surface of the filter plate and push the impurities generated by filtration on the filter plate, so that the impurities are pushed above the inclined plate and accumulate. Subsequently, the first scraper drives the second scraper away from the filter plate and resets. When reset to the initial position, the first scraper and the second scraper contact the upper surface of the filter plate again, avoiding the contact between the reset of the first scraper and the second scraper and the filter plate, and preventing the impurities on the filter plate from being driven by the reset of the first scraper and the second scraper to accumulate on the other side of the filter, resulting in the blockage of the filter plate and thus reducing the sewage treatment efficiency.

[0034] In the present invention, a dredging section and a conical head are provided. When the first scraper moves to the filter slot, the first scraper moves into the interior of the filter slot through the dredging section. When the first scraper slides inside the dredging section, it also slides inside the filter slot. The first scraper drives the conical head to move synchronously to break and dredge the blocked impurities inside the filter slot, avoiding the accumulation of impurities in the filter slot during the filtration process, which may lead to the blockage of the filter slot and thus reduce the sewage treatment efficiency.

[0035] In the present invention, a convex block is provided. When the first limiting rod slides inside the dredging section, the first limiting rod contacts the convex block, and the convex block squeezes the first limiting rod, enabling the first scraper to vibrate up and down reciprocally during the sliding and dredging process inside the filter slot. When the first scraper moves downward, it can change the position of the conical head, preventing some impurities stuck in the filter slot from being located in the gap between the conical heads, so that the conical head cannot fully contact the impurities to achieve the function of breaking and dredging. At the same time, the reciprocating vibration of the first scraper can also shake off the impurities attached to its surface, preventing the impurities from adhering to the conical head and affecting the contact surface between the conical head and the impurities, thereby reducing the crushing efficiency and dredging ability of the conical head. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The present invention will be further described below with reference to the accompanying drawings.

[0037] Figure 1 is the flow chart of the sewage treatment process of the present invention;

[0038] Figure 2 is the structural schematic diagram of the filter of the present invention;

[0039] Figure 3 is the internal structural sectional view of the filter of the present invention;

[0040] Figure 4 is the structural schematic diagram of the filter plate and the limiting plate of the present invention;

[0041] Figure 5It is a schematic structural diagram of the reciprocating screw rod, the first scraper and the second scraper of the present invention;

[0042] Figure 6 It is a schematic diagram of the structure of the first scraper and the second scraper of the present invention;

[0043] Figure 7 The present invention Figure 6 A partial enlarged view of middle A;

[0044] Figure 8 It is a structural schematic diagram of the first scraper of the present invention;

[0045] Figure 9 It is a schematic diagram of the structure of the filter plate and the filter tank of the present invention;

[0046] Figure 10 It is a structural schematic diagram of the limiting plate of the present invention;

[0047] In the figure: 1, filter; 11, water inlet pipe; 12, mixing pipe; 13, spiral blade; 14, drainage rack; 15, drainage pipe; 2, dosing box; 21, solenoid valve; 3, filter plate; 31, filter tank; 4, fixed frame; 41, reciprocating screw rod; 42, motor; 43, pulley; 44, mobile frame; 5, sliding rod; 51, mobile plate; 511, first limit rod; 52, first scraper; 521, cone head; 522, positioning Rod; 53, second scraper; 531, second limiting rod; 532, positioning groove; 6, spring; 7, limiting plate; 71, first limiting groove; 711, initial section; 712, dredging section; 713, bump; 714, pushing section; 715, first rising section; 716, first reset section; 72, second limiting groove; 721, fitting section; 722, second rising section; 723, second reset section; 8, inclined plate; 81, sealing plate. DETAILED DESCRIPTION

[0048] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0049] Embodiment 1

[0050] like Figure 1 As shown, a pharmaceutical wastewater treatment process according to the present invention comprises the following steps:

[0051] S1. The pharmaceutical wastewater is passed through the sewage pipe network into the sewage station, and most of the floating objects and large suspended particles in the wastewater are removed by the filtering equipment, and discharged into the water collection well, wherein the filtering equipment includes a filter 1, a filter plate 3 is fixedly connected to the inside of the filter 1, a filter tank 31 is arranged inside the filter plate 3, a limit plate 7 is fixedly connected to the upper surface of the filter plate 3, a movable plate 51 is slidably arranged on one side of the limit plate 7, a first scraper 52 is fixedly connected to the lower surface of the movable plate 51, and a second scraper 53 is slidably connected to one side of the first scraper 52;

[0052] S2. The collected wastewater is introduced into the regulating tank by a pump, and the wastewater is mixed evenly by a stirring device in the regulating tank. While stirring, compressed air is introduced into the regulating tank, and the air is evenly dispersed into the wastewater by using perforated pipes, aeration heads and other devices;

[0053] S3. Use a lifting pump to introduce the aerated sewage into a hydrolysis acidification tank. The hydrolysis acidification tank is equipped with a high-efficiency filler. Hydrolysis acidification bacteria attach to the filler and grow, decomposing high-molecular organic matter into small-molecular organic matter.

[0054] S4. The wastewater after hydrolysis and acidification enters the aerobic aeration tank, and the organic pollutants in the wastewater are further oxidized and degraded by aerobic microorganisms in the activated sludge inside the aerobic aeration tank, and the organic pollutants in the wastewater are converted into carbon dioxide and water that are harmless to the environment;

[0055] S5. The sewage treated in the aerobic aeration tank enters the intermediate sedimentation tank, which separates the mud-water mixture treated in the aerobic tank. After the sewage is biochemically treated, the effluent contains a large amount of activated sludge. At this time, the sewage enters the intermediate sedimentation tank for solid-liquid separation. Part of the precipitated sludge is returned to the anaerobic tank to maintain the sludge concentration of the system, and part of it is the residual sludge discharged into the sludge tank;

[0056] S6. The sewage enters the anaerobic tank A from the intermediate sedimentation tank. The function of this section is to significantly degrade organic pollutants in the water through the decomposition of anaerobic bacteria. At the same time, the macromolecular organic matter in the water that is difficult to degrade is decomposed into small molecular organic matter that is easily biodegradable through the action of anaerobic bacteria, thereby improving the biochemical degradation capacity of the back line;

[0057] S7. Sewage enters anaerobic tank B from anaerobic tank A. A small amount of aeration system is installed at the bottom of anaerobic tank B. Through aeration, the activated sludge is more fully in contact with water, so that organic matter and nitrification reflux liquid can convert ammonia-containing pollutants into nitrogen through denitrification for removal;

[0058] S8. The sewage enters the aerobic tank from the anaerobic tank B. Through the aerobic microorganisms in the activated sludge inside the aerobic tank, the organic pollutants in the sewage are further oxidized and degraded, and the organic pollutants in the sewage are converted into carbon dioxide and water harmless to the environment. The ammonia nitrogen and organic nitrogen compounds in the sewage are oxidized into nitrates, forming a nitrification-denitrification system with the denitrification in the anaerobic tank B. At the same time, the phosphorus-accumulating bacteria absorb the phosphorus in the sewage in excess, achieving the purpose of biological phosphorus removal;

[0059] S9. The sewage enters the sedimentation tank from the aerobic tank. The sedimentation tank separates the mud-water mixture treated by the aerobic tank. After the sewage treatment, a large amount of activated sludge is contained in the effluent. At this time, the sewage enters the sedimentation tank for liquid separation. Part of the precipitated sludge flows back to the anaerobic tank to maintain the sludge concentration of the system, and part of the surplus sludge is discharged into the sludge thickening tank. Lime is added to the sludge in the sludge thickening tank for disinfection treatment, and then it is regularly pumped away by a manure suction truck;

[0060] S10. The sewage enters the membrane filtration tank from the sedimentation tank. The sewage passes through the hollow fiber membrane in the membrane filtration tank, and the fine suspended solids and pathogens such as 99% of Escherichia coli in the water are filtered out through the membrane pores to ensure that the effluent meets the discharge standards;

[0061] S11. The sewage enters the ozone oxidation tank from the membrane filtration tank, and ozone agent is added to the sewage for decolorization and disinfection;

[0062] S12. After the disinfection is completed, the effluent meets the standards for reuse.

[0063] As Figures 2 to 10 shown, a water inlet pipe 11 is fixedly connected to the upper surface of the filter 1, a drain pipe 15 is fixedly connected to the side surface of the filter 1, a first limiting groove 71 is arranged inside the limiting plate 7, one side of the first limiting groove 71 is slidably connected to one side of the moving plate 51, a second limiting groove 72 is arranged inside the limiting plate 7, and one side of the second limiting groove 72 is slidably connected to one side of the second scraping plate 53;

[0064] By driving the first scraping plate 52 to move, the first scraping plate 52 drives the second scraping plate 53 to slide synchronously on the filter plate 3. The first scraping plate 52 and the second scraping plate 53 clean the impurities on the surface of the filter plate 3. At the same time, the first scraping plate 52 slides in the first limiting groove 71, and the filter groove 31 can also be dredged;

[0065] By driving the first scraping plate 52 to move, the first scraping plate 52 drives the second scraping plate 53 to slide synchronously on the filter plate 3. The first scraping plate 52 and the second scraping plate 53 clean the impurities on the surface of the filter plate 3. At the same time, the first scraping plate 52 slides in the first limiting groove 71, and the filter groove 31 can also be dredged;

[0066] As Figures 6 to 10As shown, first limiting rods 511 are rotatably connected to both sides of the moving plate 51, and the first limiting rods 511 are slidably connected to the inner wall of the first limiting groove 71. Second limiting rods 531 are rotatably connected to both sides of the second scraper 53, and the second limiting rods 531 are slidably connected to the inner wall of the second limiting groove 72.

[0067] As Figure 10 shown, the first limiting groove 71 includes an initial section 711. A dredging section 712 is provided on one side of the initial section 711. A material pushing section 714 is provided at one end of the dredging section 712. A first rising section 715 is provided on one side of the material pushing section 714. A first reset section 716 is provided on one side of the first rising section 715. The second limiting groove 72 includes a fitting section 721. A second rising section 722 is provided on one side of the fitting section 721. A second reset section 723 is provided on one side of the second rising section 722.

[0068] As Figures 1 to 4 shown, an inclined plate 8 is fixedly connected to the upper surface of the filter plate 3, and a sealing plate 81 is rotatably connected to the outside of the filter 1.

[0069] Specifically, when the existing filtering device filters impurities in sewage, the impurities are filtered by the filter plate 3, and then the impurities on the filter plate 3 are cleaned by driving the brush to move;

[0070] When the above-mentioned brush is reset after cleaning the impurities above the filter plate 3, since the sewage carrying impurities always passes through the filter plate 3, the brush will drive the impurities reattached to the filter plate 3 to be reset during the reset process. Therefore, the impurities will accumulate and block the surface of the filter plate 3, resulting in the blockage of the filter plate 3, reducing the flow rate of sewage through the filter plate 3, and thus causing the problem of reduced sewage treatment efficiency;

[0071] To solve the above problems, the working principle of the first embodiment is as follows: Sewage enters the interior of the filter 1 through the water inlet pipe 11. The sewage carrying impurities falls on the filter plate 3. The sewage is discharged through the filter tank 31 and then discharged through the drain pipe 15. At this time, the impurities are above the filter plate 3;

[0072] Under normal conditions, the first limiting rod 511 of the first scraper 52 is in the initial section 711 of the first limiting groove 71, the second limiting rod 531 of the second scraper 53 is in the fitting section 721 in the second limiting groove 72, and the lower sides of the first scraper 52 and the second scraper 53 are in contact with the upper side of the filter plate 3;

[0073] Subsequently, the moving plate 51 is driven to move. The moving plate 51 drives the first scraper 52 to move, and the first scraper 52 drives the second scraper 53 to move. At this time, the first limiting rod 511 of the first scraper 52 moves in the initial section 711 of the first limiting groove 71, and the second limiting rod 531 of the second scraper 53 moves in the fitting section 721. The first scraper 52 and the second scraper 53 perform a cleaning operation on the impurities filtered above the filter plate 3;

[0074] When the first limiting rod 511 moves to the first rising section 715 and the second limiting rod 531 moves to the second rising section 722, the first scraper 52 and the second scraper 53 move away from above the filter plate 3 and push the impurities to slide on one side of the inclined plate 8;

[0075] When the first limiting rod 511 moves to the first reset section 716 and the second limiting rod 531 moves to the second reset section 723, the first scraper 52 and the second scraper 53 push the impurities to the uppermost part of the inclined plate 8, and the impurities are concentrated at the sealing plate 81 through the inclined surface of the inclined plate 8;

[0076] Drive the first limiting rod 511 to slide in the first reset section 716 and the second limiting rod 531 to slide in the second reset section 723. At this time, the first scraper 52 drives the second scraper 53 to perform a reset movement, and moves away from above the filter plate 3 below;

[0077] When the first limiting rod 511 moves to the initial section 711 and the second limiting rod 531 moves to the fitting section 721, a cleaning process for the impurities above the filter plate 3 can be completed. Repeating the above process can push the impurities on the filter plate 3 to the sealing plate 81 for accumulation. After use, open the sealing plate 81 to centrally clean the impurities at the inclined plate 8;

[0078] In the first embodiment, by moving the first scraper 52 and the second scraper 53 away from above the filter plate 3 during reset, it is avoided that the first scraper 52 and the second scraper 53 contact the filter plate 3 during reset, so that the impurities on the filter plate 3 are driven by the reset of the first scraper 52 and the second scraper 53 to accumulate on the other side of the filter 1, resulting in blockage of the filter plate 3 and thus reducing the sewage efficiency.

[0079] As Figure 5 shown, a sliding rod 5 is fixedly connected to the upper surface of the moving plate 51. A moving frame 44 is slidably connected to the surface of the sliding rod 5. A reciprocating lead screw 41 is threadedly connected to the inside of the moving frame 44. One end of the reciprocating lead screw 41 is rotatably connected to the inner wall of the filter 1. A spring 6 is fixedly connected between the moving plate 51 and the moving frame 44.

[0080] Specifically, drive the reciprocating lead screw 41 to rotate. The reciprocating lead screw 41 drives the moving frame 44 to reciprocate inside the filter 1. The moving frame 44 drives the slide bar 5 to move synchronously. The slide bar 5 drives the moving plate 51 to move synchronously. The moving plate 51 can drive the first scraper 52 to move. The first scraper 52 drives the second scraper 53 to move. The cooperation of the first scraper 52 and the second scraper 53 can clean the impurities on the filter plate 3.

[0081] As Figure 5 shown, a fixed frame 4 is fixedly connected to one side of the limiting plate 7. The reciprocating lead screw 41 is rotatably connected to the inner wall of the fixed frame 4. A motor 42 is fixedly connected to one side of the filter 1. The output end of the motor 42 is fixedly connected to one end of the reciprocating lead screw 41. Belt pulleys 43 are fixedly connected to one ends of the reciprocating lead screw 41. The two belt pulleys 43 are connected by a belt in a transmission manner.

[0082] Specifically, turn on the motor 42. The motor 42 drives one reciprocating lead screw 41 to rotate. One end of the reciprocating lead screw 41 drives the belt pulley 43 to rotate. The belt pulley 43 drives the belt pulley 43 at one end of the other reciprocating lead screw 41 to rotate synchronously through the belt, so that the two reciprocating lead screws 41 rotate synchronously, and then the moving frame 44 can be driven to slide inside the fixed frame 4. The fixed frame 4 can prevent the impurities in the sewage from falling on the surface of the reciprocating lead screw 41, thus causing the problem that the reciprocating lead screw 41 cannot be used.

[0083] Embodiment 2

[0084] As Figures 6 to 9 shown, compared with Embodiment 1, another implementation manner of the present invention is: a tapered head 521 is fixedly connected to one end of the first scraper 52. A convex block 713 is fixedly connected to the inside of the dredging section 712. The size of the first scraper 52 matches the size of the filter groove 31. The cross-sectional shape of the filter groove 31 is set as an isosceles trapezoid.

[0085] As Figure 6 and Figure 7 shown, a positioning groove 532 is arranged inside the second scraper 53. A positioning rod 522 is slidably connected to the inside of the positioning groove 532. The positioning rod 522 is fixedly connected to the inner wall of the first scraper 52.

[0086] Specifically, some impurities with viscosity, easy to coagulate or difficult to disperse will be attached to the pharmaceutical sewage. These impurities will accumulate on the surface or inside of the filter groove 31, and are not easily washed away by the water flow and accumulate in the filter groove 31, resulting in the blockage of the filter groove 31, the decrease of the sewage filtration efficiency, and thus the problem of the reduction of the sewage efficiency.

[0087] In the second embodiment, to solve the above problems, when the first scraper 52 moves, the first scraper 52 drives the positioning rod 522 to move synchronously. Under the action of the positioning groove 532, the positioning rod 522 drives the second scraper 53 to slide synchronously. The first scraper 52 drives the first limiting rod 511 to slide inside the initial section 711, and the second limiting rod 531 slides at the fitting section 721;

[0088] When the first limiting rod 511 moves from the initial section 711 to the dredging section 712, the first limiting rod 511 drives the moving plate 51 to slide on the surface of the sliding rod 5 and stretch the spring 6. At the same time, the moving plate 51 drives the first scraper 52 to slide into the inside of the filter tank 31. At the same time, the first scraper 52 drives the positioning rod 522 to slide inside the positioning groove 532. The first scraper 52 moves into the inside of the filter tank 31. When the first limiting rod 511 moves inside the dredging section 712, the positioning rod 522 drives the second scraper 53 to slide synchronously through the positioning groove 532. The second scraper 53 pushes the impurities on the surface of the filter plate 3. The second limiting rod 531 slides in the material pushing section 714. The first scraper 52 drives the conical head 521 to move inside the filter tank 31. The blocked impurities inside the filter tank 31 are crushed by extrusion through the conical head 521, and then the filter tank 31 can be dredged. Repeating the above process can dredge the subsequent filter tank 31;

[0089] The second embodiment avoids the problem that impurities are likely to accumulate inside the filter tank 31 during the filtration process, resulting in the blockage of the filter tank 31 and thus reducing the sewage treatment efficiency;

[0090] The impurities in the pharmaceutical wastewater include the raw materials in the pharmaceutical process, which exist in the wastewater in the form of solid particles. Since the first scraper 52 is fixedly arranged and the position of the conical head 521 on its surface is fixed, when the above impurities are stuck in the filter tank 31 and are at the gap between the two conical heads 521, it is difficult for the first scraper 52 to drive the conical head 521 to crush and dredge the impurities at this time, and the impurities here prevent the first scraper 52 from moving in the filter tank 31, resulting in the difficulty of the dredging work of the first scraper 52, making it difficult to dredge the subsequent filter tank 31 and causing the decline of the sewage impurity filtration efficiency, thus resulting in the decline of the sewage treatment efficiency;

[0091] To avoid the above problems, when the present invention is in use, when the first limiting rod 511 moves in the dredging section 712, the first limiting rod 511 is squeezed by the bump 713 inside the dredging section 712, causing the first limiting rod 511 to slide downward. The first limiting rod 511 drives the first scraper 52 to slide downward, and the first scraper 52 drives the conical head 521 to move downward, changing the position of the conical head 521. Then the first limiting rod 511 disengages from the bump 713. At this time, the spring 6 drives the moving plate 51 to move on the sliding rod 5, causing the first scraper 52 to drive the conical head 521 to move again. Repeating the above operation, when the first scraper 52 moves inside the filter tank 31, the position of the conical head 521 can be changed, and part of the impurities at the gaps between the conical heads 521 can be broken. At the same time, the up-and-down reciprocating vibration of the conical head 521 can also prevent impurities from adhering to the conical head 521.

[0092] As Figure 2 As shown in the figure, a mixing pipe 12 is fixedly connected inside the filter 1, a spiral blade 13 is fixedly connected inside the mixing pipe 12, a chemical dosing tank 2 is fixedly connected to the upper surface of the filter 1, and a solenoid valve 21 is fixedly connected between the inner walls of the chemical dosing tank 2 and the filter plate 3.

[0093] Specifically, when sewage enters the inside of the filter 1 through the water inlet pipe 11, the chemical agent inside the chemical dosing tank 2 is discharged quantitatively through the solenoid valve 21. The chemical agent and the sewage enter the inside of the mixing pipe 12. The spiral blade 13 can cause the sewage to swirl, and the swirling of the sewage can fully mix the chemical agent. At the same time, the spiral blade 13 also increases the contact time between the sewage and the chemical agent, making the mixing of the sewage and the chemical agent more sufficient.

[0094] Working principle: Sewage enters the inside of the filter 1 through the water inlet pipe 11. The chemical agent inside the chemical dosing tank 2 is discharged quantitatively through the solenoid valve 21. The chemical agent and the sewage enter the inside of the mixing pipe 12. The spiral blade 13 can cause the sewage to swirl, and the swirling of the sewage can fully mix the chemical agent. At the same time, the spiral blade 13 also increases the contact time between the sewage and the chemical agent, making the mixing of the sewage and the chemical agent more sufficient. Subsequently, the sewage carrying impurities falls on the filter plate 3, and the sewage is discharged through the filter tank 31 and then through the drain pipe 15. At this time, the impurities are above the filter plate 3;

[0095] Turn on the motor 42. The motor 42 drives a reciprocating lead screw 41 to rotate. One end of the reciprocating lead screw 41 drives a pulley 43 to rotate. The pulley 43 drives the pulley 43 at one end of another reciprocating lead screw 41 to rotate synchronously through a belt, causing the two reciprocating lead screws 41 to rotate synchronously, thereby driving the moving frame 44 to slide inside the fixed frame 4. The reciprocating lead screw 41 drives the moving frame 44 to reciprocate inside the filter 1. The moving frame 44 drives the sliding rod 5 to move synchronously, and the sliding rod 5 drives the moving plate 51 to move synchronously. The moving plate 51 can drive the first scraper 52 to move;

[0096] When the first scraper 52 moves, the first scraper 52 drives the positioning rod 522 to move synchronously. Under the action of the positioning groove 532, the positioning rod 522 drives the second scraper 53 to slide synchronously;

[0097] Under normal conditions, the first limiting rod 511 of the first scraper 52 is at the initial section 711 of the first limiting groove 71, and the second limiting rod 531 of the second scraper 53 is at the fitting section 721 in the second limiting groove 72. The lower parts of the first scraper 52 and the second scraper 53 are in contact with the upper part of the filter plate 3;

[0098] Subsequently, the moving plate 51 is driven to move. The moving plate 51 drives the first scraper 52 to move, and the first scraper 52 drives the second scraper 53 to move. At this time, the first limiting rod 511 of the first scraper 52 moves in the initial section 711 of the first limiting groove 71, and the second limiting rod 531 of the second scraper 53 moves in the fitting section 721. The first scraper 52 and the second scraper 53 perform a cleaning operation on the impurities filtered above the filter plate 3;

[0099] When the first limiting rod 511 moves from the initial section 711 to the dredging section 712, the first limiting rod 511 drives the moving plate 51 to slide on the surface of the sliding rod 5 and stretch the spring 6. At the same time, the moving plate 51 drives the first scraper 52 to slide into the interior of the filter groove 31. At the same time, the first scraper 52 drives the positioning rod 522 to slide inside the positioning groove 532. The first scraper 52 moves into the interior of the filter groove 31. When the first limiting rod 511 moves inside the dredging section 712, the positioning rod 522 drives the second scraper 53 to slide synchronously through the positioning groove 532. The second scraper 53 pushes the impurities on the surface of the filter plate 3, and the second limiting rod 531 slides in the material pushing section 714. The first scraper 52 drives the conical head 521 to move inside the filter groove 31. The clogged impurities inside the filter groove 31 are crushed by the extrusion of the conical head 521, and the filter groove 31 can be dredged. Repeating the above process can dredge the subsequent filter grooves 31;

[0100] When the first limiting rod 511 moves in the dredging section 712, the first limiting rod 511 is extruded by the bump 713 inside the dredging section 712, causing the first limiting rod 511 to slide downward. The first limiting rod 511 drives the first scraper 52 to slide downward, and the first scraper 52 drives the cone head 521 to move downward, causing a change in the position of the cone head 521. Then the first limiting rod 511 disengages from the bump 713. At this time, the spring 6 drives the moving plate 51 to move on the sliding rod 5, causing the first scraper 52 to drive the cone head 521 to move again. Repeating the above operation, when the first scraper 52 moves inside the filter tank 31, the position of the cone head 521 can be changed, and part of the impurities at the gaps between the cone heads 521 can be crushed. At the same time, the reciprocating up and down vibration of the cone head 521 can also prevent impurities from adhering to the cone head 521;

[0101] When the first limiting rod 511 moves to the first rising section 715 and the second limiting rod 531 moves to the second rising section 722, the moving plate 51 is driven to move upward by the spring 6, and the first scraper 52 and the second scraper 53 move away from above the filter plate 3 and push the impurities to slide on one side of the inclined plate 8;

[0102] When the first limiting rod 511 moves to the first reset section 716 and the second limiting rod 531 moves to the second reset section 723, the first scraper 52 and the second scraper 53 push the impurities to the uppermost part of the inclined plate 8, and the impurities are concentrated at the sealing plate 81 through the inclined surface of the inclined plate 8;

[0103] Drive the first limiting rod 511 to slide in the first reset section 716 and the second limiting rod 531 to slide in the second reset section 723. At this time, the first scraper 52 drives the second scraper 53 to perform a reset movement, and moves away from above the filter plate 3 below;

[0104] When the first limiting rod 511 moves to the initial section 711 and the second limiting rod 531 moves to the fitting section 721, a primary cleaning process of the impurities above the filter plate 3 can be completed. Repeating the above process can push the impurities on the filter plate 3 to the sealing plate 81 for accumulation. After use, open the sealing plate 81 to centrally clean the impurities at the inclined plate 8.

[0105] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A pharmaceutical wastewater treatment process, characterized in that: The following steps are included: S1. The pharmaceutical wastewater is passed through a sewage pipe network into a sewage station, and most of the floating matter and large suspended matter in the wastewater are removed by a filtering device, and then discharged into a water collection well, wherein the filtering device comprises a filter (1), a filter plate (3) is fixedly connected to the inside of the filter (1), a filter tank (31) is arranged inside the filter plate (3), a limit plate (7) is fixedly connected to the upper surface of the filter plate (3), a movable plate (51) is slidably arranged on one side of the limit plate (7), a first scraper (52) is fixedly connected to the lower surface of the movable plate (51), and a second scraper (53) is slidably connected to one side of the first scraper (52); S2, sewage enters the regulating tank, and compressed air is introduced into the regulating tank for stirring; S3, the aerated sewage is introduced into the hydrolysis acidification tank to decompose the high molecular organic matter in the sewage into small molecular organic matter; S4, the hydrolyzed and acidified sewage enters the aerobic aeration tank and converts the organic pollutants in the sewage into carbon dioxide and water; S5. The wastewater treated in the aerobic aeration tank enters the intermediate sedimentation tank for solid-liquid separation; S6. The sewage enters the anaerobic tank A from the intermediate sedimentation tank, where anaerobic bacteria degrade organic pollutants in the water; S7, sewage enters anaerobic tank B from anaerobic tank A and undergoes aeration treatment; S8, sewage enters the aerobic tank from the anaerobic tank B, so that the organic pollutants in the sewage are converted into carbon dioxide and water; S9, sewage enters the sedimentation tank from the aerobic tank, and the sedimentation tank separates the mud-water mixture treated by the aerobic tank; S10, sewage enters the membrane filtration tank from the sedimentation tank, and fine suspended matter and 99% of pathogens such as Escherichia coli in the water are filtered through the membrane pores; S11. The sewage enters the ozone oxidation tank from the membrane filtration tank, and the sewage is decolorized and disinfected by adding ozone; S12. After disinfection is completed, the effluent meets the standards and can be reused.

2. A filtering device used in the process according to claim 1, characterized in that: The upper surface of the filter (1) is fixedly connected with a water inlet pipe (11), and the side of the filter (1) is fixedly connected with a drain pipe (15). A first limiting groove (71) is provided inside the limiting plate (7), and the first limiting groove (71) is slidably connected to one side of the movable plate (51). A second limiting groove (72) is provided inside the limiting plate (7), and the inside of the second limiting groove (72) is slidably connected to one side of the second scraper (53). By driving the first scraper (52) to move, the first scraper (52) drives the second scraper (53) to slide synchronously on the filter plate (3), and the first scraper (52) and the second scraper (53) clean impurities on the surface of the filter plate (3). At the same time, the first scraper (52) slides in the first limiting groove (71) and can also perform a dredging operation on the filter tank (31).

3. The filtering device according to claim 2, characterized in that: The upper surface of the movable plate (51) is fixedly connected to a slide rod (5), the surface of the slide rod (5) is slidably connected to a movable frame (44), the internal thread of the movable frame (44) is connected to a reciprocating screw rod (41), one end of the reciprocating screw rod (41) is rotatably connected to the inner wall of the filter (1), and a spring (6) is fixedly connected between the movable plate (51) and the movable frame (44).

4. The filtering device according to claim 3, characterized in that: One side of the limit plate (7) is fixedly connected to a fixed frame (4), the reciprocating screw rod (41) is rotatably connected to the inner wall of the fixed frame (4), one side of the filter (1) is fixedly connected to a motor (42), the output end of the motor (42) is fixedly connected to one end of the reciprocating screw rod (41), one end of the reciprocating screw rod (41) is fixedly connected to a pulley (43), and the two pulleys (43) are connected via a belt transmission.

5. The filtering device according to claim 4, characterized in that: The movable plate (51) is rotatably connected to first limiting rods (511) on both sides, and the first limiting rods (511) are slidably connected to the inner wall of the first limiting groove (71); the second scraper (53) is rotatably connected to second limiting rods (531) on both sides, and the second limiting rods (531) are slidably connected to the inner wall of the second limiting groove (72).

6. The filtering device according to claim 5, characterized in that: A positioning groove (532) is provided inside the second scraper (53), a positioning rod (522) is slidably connected inside the positioning groove (532), and the positioning rod (522) is fixedly connected to the inner wall of the first scraper (52).

7. The filtering device according to claim 6, characterized in that: The first limiting groove (71) includes an initial section (711), a dredging section (712) is arranged on one side of the initial section (711), a pushing section (714) is arranged at one end of the dredging section (712), a first rising section (715) is arranged on one side of the pushing section (714), a first resetting section (716) is arranged on one side of the first rising section (715), and the second limiting groove (72) includes a fitting section (721), a second rising section (722) is arranged on one side of the fitting section (721), and a second resetting section (723) is arranged on one side of the second rising section (722).

8. The filtering device according to claim 7, characterized in that: A cone head (521) is fixedly connected to one end of the first scraper (52), a protrusion (713) is fixedly connected inside the dredging section (712), the size of the first scraper (52) matches the size of the filter tank (31), and the cross-sectional shape of the filter tank (31) is set to be an isosceles trapezoid.

9. The filtering device according to claim 2, characterized in that: The upper surface of the filter plate (3) is fixedly connected to an inclined plate (8), and the outer side of the filter (1) is rotatably connected to a sealing plate (81).

10. The filtering device according to claim 9, characterized in that: The interior of the filter (1) is fixedly connected to a mixing tube (12), the interior of the mixing tube (12) is fixedly connected to a spiral blade (13), the upper surface of the filter (1) is fixedly connected to a dosing box (2), and a solenoid valve (21) is fixedly connected between the dosing box (2) and the inner wall of the filter plate (3).

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