Modular sewage treatment magnetic flocculation equipment and system

Abstract

The invention discloses modularized sewage treatment magnetic flocculation equipment and system, and belongs to the technical field of sewage treatment. Modular sewage treatment magnetic flocculation equipment comprises a mounting box provided with a preorder treatment unit and a precipitation cavity, and further comprises a cylindrical box fixedly mounted in the precipitation cavity, and the cylindrical box is communicated with the precipitation cavity; the annular seat is fixedly mounted in the cylindrical box, and an arc-shaped groove is formed in the inner side of the annular seat; according to the invention, through the specially-made disc-type filter and the ingenious cooperation of the fixed telescopic rod and the cleaning unit, the dynamic cleaning of the filter plate is realized, when the cleaning unit rotates, the cleaning unit can effectively jack up one side of the disc-type filter, and water after cleaning passes through the disc-type filter from top to bottom by utilizing the gravity action and the hydrodynamic principle, so that the cleaning effect is improved. And reverse flushing is realized, the filter is effectively prevented from being blocked by magnetic powder flocculates, and the operation efficiency and stability of equipment are improved.

Description

Technical Field

[0001] The invention relates to the technical field of sewage treatment, and in particular to a modular sewage treatment magnetic flocculation device. Background Art

[0002] With the acceleration of urbanization, the urban population continues to increase, and the amount of domestic wastewater has surged, which has brought tremendous pressure to the sewage network and treatment system. The drainage network is at risk of overflow, and the sewage treatment plant is facing the problem of overload operation. Sewage needs to be treated urgently. In addition, the rapid development of the city has also led to prominent conflicts in the use of land for sewage treatment plants. Traditional steel-concrete structure sewage treatment plants are difficult to site, have many construction processes, and have a construction period of half a year to two years, which is difficult to solve the urgent problem. At the same time, the high investment and construction costs make it difficult for local governments to bear. For the emergency sewage treatment projects that have gradually increased in recent years, their construction period is short and the available area is small, so it is difficult to implement steel-concrete structure sewage treatment plants.

[0003] In the existing magnetic flocculation equipment, an inclined filter plate is generally installed inside the sedimentation area when separating sediment and water. The inclined filter plate is easily blocked by flocculants during use, resulting in reduced efficiency in separating flocculants from sewage. In addition, the existing modular sewage treatment systems mostly adopt a combination of multiple sets of equipment. However, due to the single process, the treatment process cannot be flexibly adjusted according to the water inlet conditions, and most of them have different sizes and are complicated to manufacture and process. Therefore, a modular sewage treatment magnetic flocculation equipment and system is proposed herein. Summary of the invention

[0004] The present invention is to solve the problem of low sewage treatment efficiency in the prior art and proposes a modular sewage treatment magnetic flocculation device.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A modular sewage treatment magnetic flocculation device comprises an installation box provided with a pre-processing unit and a sedimentation chamber, and further comprises: a cylindrical box fixedly installed in the sedimentation chamber, the cylindrical box being connected to the sedimentation chamber; an annular seat fixedly installed in the cylindrical box, an inner side of the annular seat being provided with an arc groove; a disc filter movably arranged on the annular seat, the side wall of the disc filter being provided with an arc edge, the arc edge being coupled with the arc groove; a fixed telescopic rod, the two ends of which are respectively hinged to the top wall inner wall of the sedimentation chamber and the top of the disc filter; a mud scraping unit rotatably arranged in the sedimentation chamber; a cleaning unit obliquely arranged in the cylindrical box, connected to the mud scraping unit and attached to the bottom wall of the disc filter; the mud scraping unit drives the cleaning unit to rotate about the rotation axis of the mud scraping unit, and the rotating cleaning unit lifts up one side of the disc filter that is in conflict with the cleaning unit.

[0007] As a preferred embodiment of the present invention: the pre-processing unit includes a feed chamber, a first mixing chamber, a magnetic powder adding chamber, a second mixing chamber and a drainage chamber which are arranged in the installation box from left to right, and the sedimentation chamber is arranged between the second mixing chamber and the drainage chamber; the feed chamber, the first mixing chamber, the magnetic powder adding chamber and the second mixing chamber are all provided with a stirring mechanism; a magnetic powder recovery and feeding integrated machine and a magnetic powder floc separator are fixedly installed on the top of the installation box, the magnetic powder recovery and feeding integrated machine is used to feed magnetic powder into the magnetic powder adding chamber, the output end of the magnetic powder floc separator is connected to the magnetic powder recovery and feeding integrated machine through a second mud discharge pipe, and the output end of the magnetic powder recovery and feeding integrated machine is fixedly installed with a discharge pipe; a drainage trough body is fixedly installed in the installation box, and both ends of the drainage trough body are connected with the sedimentation chamber and the drainage chamber.

[0008] As a preferred embodiment of the present invention: the stirring mechanism comprises a first motor fixedly mounted on the top of the mounting box, and the output shaft of the first motor extends into the chamber where a stirring rod is fixedly mounted.

[0009] As a preferred embodiment of the present invention: an installation cavity is provided in the installation box, a suction pump group is fixedly installed in the installation cavity, a mud suction pipe is fixedly installed at the input end of the suction pump group, a collecting box is fixedly installed at the bottom of the sedimentation chamber, the bottom of the collecting box is connected to the mud suction pipe, a third mud discharge pipe is fixedly installed at the first output end of the suction pump group, the output end of the third mud discharge pipe extends into the magnetic powder adding chamber, a first mud discharge pipe is fixedly installed at the second output end of the suction pump group, and the output end of the first mud discharge pipe is connected to the magnetic powder flocculant separator.

[0010] As a preferred embodiment of the present invention: the scraper unit includes a mounting shaft rotatably mounted in the sedimentation chamber, a scraper blade is fixedly mounted on the bottom of the mounting shaft, a second motor is fixedly mounted on the top of the mounting box, and an output end of the second motor is fixedly connected to the mounting shaft.

[0011] As a preferred embodiment of the present invention: the disc filter includes a bottom mesh plate, a first limiting ring and a second limiting ring are fixedly installed on the top of the bottom mesh plate, the top of the first limiting ring and the second limiting ring are fixedly installed with a top mesh plate by bolts, and a filter disc is fixedly installed in a filter box body composed of the bottom mesh plate, the first limiting ring, the second limiting ring and the top mesh plate; a mounting ball is fixedly connected to the mounting shaft, and the second limiting ring is hinged to the mounting ball.

[0012] As a preferred embodiment of the present invention: the fixed telescopic rod includes a piston cylinder and a sliding rod, the sliding rod is slidably connected to the piston cylinder, a first ball joint seat is fixedly installed on the piston cylinder, the first ball joint seat is fixedly connected to the top inner wall of the mounting box, a second ball joint seat is fixedly installed on the sliding rod, and the second ball joint seat is fixedly connected to the top mesh plate.

[0013] As a preferred embodiment of the present invention: the cleaning unit includes a mounting seat fixedly mounted on the mounting shaft, a mounting tube is rotatably mounted on the mounting seat, a cleaning brush is fixedly mounted on the mounting tube, a driven roller is fixedly mounted on the mounting tube, the driven roller is attached to the bottom mesh plate, a connecting plate is fixedly mounted on the scraper plate, and the mounting tube is rotatably connected to the connecting plate.

[0014] As a preferred embodiment of the present invention: the fixed telescopic rod includes a piston cylinder and a sliding rod, the sliding rod extends into the piston cylinder and is fixedly installed with a piston plate, the piston cylinder is fixedly installed with a first ball joint seat, the first ball joint seat is fixedly connected to the top inner wall of the installation box, the sliding rod is fixedly installed with a second ball joint seat, and the second ball joint seat is fixedly connected to the top mesh plate; an air duct is opened in the installation shaft, a second air pipe is fixedly installed at the exhaust end of the piston cylinder, a second rotating joint connected to the air duct is fixedly installed on the installation shaft, and the second air pipe is fixedly connected to the rotating end of the second rotating joint; a first rotating joint is fixedly installed on the installation tube, a first air pipe is fixedly installed at the rotating end of the first rotating joint, and the first air pipe is connected to the air duct; an exhaust groove is opened on the side wall of the installation tube, and the notch of the exhaust groove faces the cleaning brush.

[0015] A modular sewage treatment system comprises the following steps:

[0016] a. The sewage to be treated first enters the pretreatment module, and the pretreatment module is provided with a filtering device;

[0017] b. The effluent from the pretreatment module enters the biochemical module, and the biochemical module is provided with an independent oxygen regulation zone and an aerobic zone, each zone is connected in sequence by a pipeline, and the effluent from the aerobic zone can be transported to the oxygen regulation zone through a reflux pipeline;

[0018] c. If the effluent standard is higher than the Class A standard (GB18918-2002), anoxic zone II is set up. The HRT of anoxic zone II is 50% to 70% of the HRT of aerobic zone. The effluent of anoxic zone II can be transported to oxygen regulating zone I through reflux pipeline II. If anoxic zone II is set up, the effluent of aerobic zone does not need to be refluxed to oxygen regulating zone I.

[0019] d. The oxygen regulating zone, aerobic zone and anoxic zone of the biochemical module are all provided with suspended fillers, the suspended filler HDPE type MBBR is provided in the oxygen regulating zone and the anoxic zone, and the suspended filler polyurethane is provided in the aerobic zone;

[0020] e. When the total nitrogen in the influent exceeds 70 mg / L and the original process does not meet the standard, the original process is switched to the activated sludge process, the net cage in the biochemical module is hoisted out as a whole, and activated sludge cultivated in advance is added;

[0021] f. When the influent organic matter concentration exceeds the designed influent concentration and the original process treatment fails to meet the standard, the oxygen adjustment zone 1 is adjusted to an anaerobic state, and an anaerobic-aerobic process or an anaerobic-aerobic-anoxic process is adopted;

[0022] g. The effluent from the biochemical module enters the magnetic flocculation equipment, disinfection module, and effluent metering module in sequence for discharge.

[0023] Compared with the prior art, the present invention provides a modular sewage treatment magnetic flocculation device, which has the following beneficial effects:

[0024] 1. This modular sewage treatment magnetic flocculation equipment realizes dynamic cleaning of the filter plate through a special disc filter, combined with the ingenious cooperation of a fixed telescopic rod and a cleaning unit. When the cleaning unit rotates, it can effectively lift up one side of the disc filter, and use gravity and fluid dynamics to make the cleaned water pass through the disc filter from top to bottom to achieve reverse flushing, effectively preventing the magnetic powder floccules from clogging the filter and improving the operating efficiency and stability of the equipment;

[0025] 2. The modular sewage treatment magnetic flocculation equipment, through the arc edge design of the disc filter coupled with the arc groove of the annular seat, enables the filter to more effectively change the flow direction of sewage when moving up and down, enhance the rotation effect, not only improve the efficiency of sewage treatment, but also promote the precipitation of magnetic powder flocculants;

[0026] The parts not involved in the device are the same as the existing technology or can be implemented by using the existing technology. The biochemical module in the present invention can achieve process switching by replacing the suspended filler with the activated sludge to meet the requirements of different influent water quality and effluent standards. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A system diagram of a modular sewage treatment system proposed by the present invention;

[0028] Figure 2 A schematic diagram of the three-dimensional structure of a modular sewage treatment magnetic flocculation device proposed by the present invention;

[0029] Figure 3This is a main cross-sectional view of a modular sewage treatment magnetic flocculation device proposed by the present invention;

[0030] Figure 4 A three-dimensional cross-sectional view of a sedimentation chamber of a modular sewage treatment magnetic flocculation device proposed by the present invention Figure 1 ;

[0031] Figure 5 This is a structural schematic diagram of a fixed telescopic rod of a modular sewage treatment magnetic flocculation device proposed by the present invention;

[0032] Figure 6 This is a main cross-sectional view of a sedimentation chamber of a modular sewage treatment magnetic flocculation device proposed by the present invention;

[0033] Figure 7 A three-dimensional cross-sectional view of a sedimentation chamber of a modular sewage treatment magnetic flocculation device proposed by the present invention Figure 2 ;

[0034] Figure 8 A modular sewage treatment magnetic flocculation device proposed by the present invention Figure 7 Schematic diagram of the structure of the middle Z part;

[0035] Fig. 9 This is a schematic diagram of the exploded structure of a disc filter of a modular sewage treatment magnetic flocculation equipment proposed by the present invention.

[0036] In the figure: 1, installation box; 2, feeding chamber; 3, first mixing chamber; 4, magnetic powder adding chamber; 5, second mixing chamber; 6, sedimentation chamber; 7, columnar box; 8, drainage chamber; 9, suction pump group; 10, first motor; 101, stirring rod; 11, mud suction pipe; 12, first mud discharge pipe; 13, magnetic powder flocculant separator; 14, magnetic powder recovery and feeding integrated machine; 15, second mud discharge pipe; 16, discharge pipe; 17, first ball joint seat; 18, fixed telescopic rod; 181, piston cylinder; 182, sliding rod; 183, piston plate; 19, second ball joint seat; 20, Disc filter; 201, bottom mesh plate; 202, first limiting ring; 203, second limiting ring; 204, top mesh plate; 205, filter disc; 21, second motor; 22, mounting shaft; 23, mounting ball; 24, mounting seat; 25, mounting tube; 251, driven roller; 26, cleaning brush; 27, exhaust groove; 28, first rotating joint; 29, first air pipe; 30, second rotating joint; 31, second air pipe; 32, collecting box; 33, connecting plate; 34, scraper plate; 35, annular seat; 36, drainage trough body; 37, third mud drainage pipe. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0038] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0039] Embodiment 1: Figure 1 As shown, a modular sewage treatment system comprises the following steps:

[0040] a. The sewage to be treated first enters the pretreatment module, which is equipped with a filtering device;

[0041] b. The effluent from the pretreatment module enters the biochemical module. The biochemical module is provided with an independent oxygen regulation zone and an aerobic zone. Each zone is connected in sequence through pipelines. The effluent from the aerobic zone can be transported to the oxygen regulation zone through a reflux pipeline.

[0042] c. If the effluent standard is higher than the Class A standard (GB18918-2002), anoxic zone II is set up. The HRT of anoxic zone II is 50% to 70% of the HRT of aerobic zone. The effluent of anoxic zone II can be transported to oxygen regulating zone I through reflux pipeline II. If anoxic zone II is set up, the effluent of aerobic zone does not need to be refluxed to oxygen regulating zone I.

[0043] d. Suspended fillers are set in the oxygen regulation zone 1, aerobic zone and anoxic zone 2 of the biochemical module. Suspended fillers HDPE type MBBR are set in the oxygen regulation zone 1 and anoxic zone 2, and suspended fillers polyurethane are set in the aerobic zone;

[0044] e. When the total nitrogen in the influent exceeds 70 mg / L and the original process does not meet the standard, the original process is switched to the activated sludge process, the net cage in the biochemical module is hoisted out as a whole, and activated sludge that has been cultivated in advance is added;

[0045] f. When the influent organic matter concentration exceeds the designed influent concentration and the original process treatment fails to meet the standard, the oxygen adjustment zone 1 is adjusted to an anaerobic state, and an anaerobic-aerobic process or an anaerobic-aerobic-anoxic process is adopted;

[0046] g. The effluent from the biochemical module enters the high-efficiency sedimentation module, disinfection module, and effluent metering module in sequence for discharge.

[0047] The (anaerobic) anoxic zone 1, aerobic zone and anoxic zone 2 of the biochemical module are respectively composed of a number of anoxic devices 1, aerobic devices and anoxic devices 2 of the same size; the anoxic devices 1, aerobic devices and anoxic devices 2 are respectively manufactured using corresponding standard size plates, and the specifications of the corresponding standard size plates are fixed; the corresponding standard size plates are corrugated plates;

[0048] The biochemical module equipment is composed of venting pipeline, water inlet pipeline, aeration pipeline and backwashing pipeline from bottom to top, and the main pipes of the pipelines are fixed to the inner wall of the equipment;

[0049] The bottom of the cage is placed on the vertical base at the bottom of the equipment, the upper part of the cage is fixed to the top of the equipment with bolts or chains, and the upper side wall of the cage has a hanging component; the bottom, side wall and top of the cage are all perforated screen plates, the screen aperture is 70% to 80% of the suspended filler aperture, and the screen plate opening rate is 80% to 90%;

[0050] Among them, the density of HDPE type MBBR filler is 0.95~0.98g / m 3 , porosity is 80% to 85%, specific surface area>800m 2 / m 3 The filling rate is 60% to 90%; the density of polyurethane filler is 0.1 to 0.2 g / m 3 , porosity>95%, specific surface area>10000m 2 / m 3 , the filling rate is 60% to 90%;

[0051] The high-efficiency precipitation module adopts magnetic flocculation equipment, HRT≤0.5h, magnetic powder recovery rate≥95%;

[0052] The total HRT of the biochemical module is ≤8h.

[0053] The experimental water treatment volume is 5000m 3 / d, using 5 sets of biochemical module equipment and 1 set of magnetic flocculation equipment for treatment. The inlet water is lifted from the inlet pump room to the inlet microfilter by a lifting pump to remove larger particles and impurities. After filtration, the effluent first enters the (anaerobic) anoxic zone 1 of the biochemical module (wherein, the (anaerobic) anoxic zone 1 is the oxygen regulation zone 1), and enters the water distribution pipes evenly arranged at the bottom through the side wall main pipe of the equipment. The sewage flows from bottom to top through the MBBR filler filled inside, and the effluent flows to the aerobic zone through the outlet pipe set on the upper side wall of the equipment. A screen plate is installed at the outlet pipe on the side wall of the equipment to prevent larger impurities from entering the next level of equipment. The water inlet and outlet of the aerobic zone are similar to those of the (anaerobic) anoxic zone 1. Lightweight polyurethane sponge fillers are filled in the aerobic zone. The sewage flows into the anoxic zone 2 from bottom to top after being treated. A nitrification liquid reflux pump is installed in the anoxic zone 2 to return the nitrification liquid to the (anaerobic) anoxic zone 1. The effluent from the anoxic zone 2 enters the magnetic flocculation equipment to further remove phosphorus and suspended solids. The total HRT of the magnetic flocculation equipment is 25min, and the magnetic powder recovery rate is ≥95%. The effluent from the magnetic flocculation is discharged into natural water bodies after ultraviolet disinfection and a pasteurization metering tank.

[0054] The biochemical module equipment includes (anaerobic) anoxic zone 1 equipment, aerobic zone equipment and anoxic zone 2 equipment, all of which are made of weathering steel. Furthermore, the plate form adopts flat-bottom corrugated plate to enhance the structural strength and facilitate processing and manufacturing.

[0055] (Anaerobic) The equipment in the anoxic zone 1 is, from bottom to top, the vent pipe, water inlet pipe, aeration pipe and aerator, and backwash air pipe. The main pipes of the above pipes are fixed to the inner wall of the equipment, and the branch pipes are evenly arranged in the vertical space at the bottom of the equipment; above the pipeline is a vertical base, on which the net box is placed. The inside of the net box is filled with MBBR filler, which is made of HDPE and has a filling rate of 70%. The net box is in the form of a stainless steel woven mesh box with an opening rate of about 85%. The aperture of the woven mesh is about 60% of the diameter of the suspended filler A. The larger aperture and opening rate make the fluidization state of the MBBR filler almost unaffected by the net box; a lifting ring is welded on the upper part of the net box to facilitate subsequent process modification or equipment bottom maintenance. The upper part of the net box is fixed to the top of the equipment with a chain; the density of the MBBR filler before film formation is 0.95g / m 3 After film formation, the density is about 0.98g / m 3 , it can achieve suspension state under intermittent aeration in the anoxic zone, and does not generate buoyancy on the cage.

[0056] The equipment pipeline layout and cage layout in the aerobic zone are similar to those in the anoxic zone. The cages in the aerobic zone are filled with polyurethane sponge fillers with a density of 0.1-0.2 g / m 3 , porosity>95%, specific surface area>10000m 2 / m 3 , the filling rate is 65%.

[0057] The designed inlet / outlet water concentration and actual inlet / outlet water concentration of the project are shown in the following table.

[0058] The effective volume of each biochemical module is 190m 3 , the actual HRT is 4.56h.

[0059]

[0060] The actual inlet and outlet water concentrations are the average values ​​of 15 consecutive sampling values.

[0061] The water treatment capacity is 2000m 3 / d, using 2 sets of biochemical module equipment and 1 set of magnetic flocculation equipment for treatment. Due to the high total nitrogen concentration of the influent in the later stage of the project, the activated sludge method is proposed. First, remove the detachable screen plate on the upper part of the cage on the inner wall of the equipment, and then use a crane to slowly lift out the cage installed in the equipment as a whole. After the cage is lifted out, put in the activated sludge that has been cultivated in advance, and then carry out intermittent water inlet and continuous water inlet debugging. If it is switched to MBBR process in the later stage, the cage and the MBBR filler filled inside shall be placed in the same type of sewage pool for cultivation, and then the cage shall be lifted into the equipment for fixed installation.

[0062] Embodiment 2:

[0063] In order to prevent the filter plates inside the secondary flocculation equipment from being blocked by magnetic powder flocculants, a modularized magnetic flocculation equipment for sewage treatment is proposed.

[0064] like Figure 2-Figure 9 As shown, the magnetic flocculation device is provided with an installation box 1 of a pre-processing unit and a sedimentation chamber 6, and also includes: a cylindrical box 7 fixedly installed in the sedimentation chamber 6, and the cylindrical box 7 is connected to the sedimentation chamber 6; an annular seat 35, fixedly installed in the cylindrical box 7, and an arc groove is provided on the inner side of the annular seat 35; a disc filter 20, movably arranged on the annular seat 35, and the side wall of the disc filter 20 is provided with an arc edge, and the arc edge is coupled with the arc groove; a fixed telescopic rod 18, and both ends are respectively hinged to the top wall inner wall of the sedimentation chamber 6 and the top of the disc filter 20; a mud scraping unit, which is rotatably arranged in the sedimentation chamber 6; a cleaning unit, which is tiltedly arranged in the cylindrical box 7, and is connected to the mud scraping unit and is attached to the bottom wall of the disc filter 20.

[0065] In this embodiment, the scraper unit drives the cleaning unit to rotate about the rotation axis of the scraper unit. The rotating cleaning unit lifts up one side of the disc filter 20 that is in contact with the cleaning unit. Under the action of the fixed telescopic rod 18, the disc filter 20 cannot rotate. Then, the position to which the cleaning unit rotates will cause the corresponding position of the disc filter 20 to rise, and then the other end symmetrical to the rising position will fall. As the cleaning unit rotates around the rotation axis of the scraper unit, the edge of the disc filter 20 gradually rises, then gradually falls, and so on.

[0066] When one side of the disc filter 20 rises, the cleaned water above the disc filter 20 passes through the disc filter 20 from top to bottom under the action of gravity and mutual force, thereby backwashing the disc filter 20 and preventing the bottom of the disc filter 20 from being blocked.

[0067] At the same time, when one side of the disc filter 20 gradually rises in a circular trajectory and the other side gradually descends in a circular trajectory, the up and down movement of the disc filter 20 will change the flow rate of the sewage around it. On the rising side of the disc filter 20, the sewage is squeezed and the flow rate is accelerated; on the descending side, the sewage is relatively slowed down. This flow rate difference will form a flow rate gradient around the disc filter 20. According to the principles of fluid dynamics, when there is a flow rate gradient in the fluid, shear force will be generated. This shear force will push the fluid to flow to the area with slower flow rate, thereby forming rotation.

[0068] The side wall of the disc filter 20 is designed as an arc edge, which is coupled with the arc groove of the annular seat 35. This design enables the disc filter 20 to more effectively change the flow direction of sewage when moving up and down, thereby enhancing the rotation effect.

[0069] Under the action of centrifugal force, the heavier magnetic powder flocculants of the rotating sewage will move to the periphery of the sedimentation chamber 6 and settle down, thereby improving the sedimentation effect of the flocculants and improving the effluent water quality.

[0070] Reference Figure 3The pre-processing unit includes a feed chamber 2, a first mixing chamber 3, a magnetic powder adding chamber 4, a second mixing chamber 5 and a drainage chamber 8 which are arranged in the installation box 1 from left to right, and a sedimentation chamber 6 is arranged between the second mixing chamber 5 and the drainage chamber 8; the feed chamber 2, the first mixing chamber 3, the magnetic powder adding chamber 4 and the second mixing chamber 5 are all provided with a stirring mechanism; a magnetic powder recovery and feeding integrated machine 14 and a magnetic powder flocculant separator 13 are fixedly installed on the top of the installation box 1, the magnetic powder recovery and feeding integrated machine 14 is used to feed magnetic powder into the magnetic powder adding chamber 4, the output end of the magnetic powder flocculant separator 13 is connected to the magnetic powder recovery and feeding integrated machine 14 through a second mud discharge pipe 15, and a discharge pipe 16 is fixedly installed at the output end of the magnetic powder recovery and feeding integrated machine 14; a drainage trough body 36 is fixedly installed in the installation box 1 , both ends of the drainage trough body 36 are connected with the sedimentation chamber 6 and the drainage chamber 8; the stirring mechanism includes a first motor 10 fixedly installed on the top of the installation box 1, and the output shaft of the first motor 10 extends to the chamber where a stirring rod 101 is fixedly installed; an installation chamber is provided in the installation box 1, and a suction pump group 9 is fixedly installed in the installation chamber, and a mud suction pipe 11 is fixedly installed at the input end of the suction pump group 9, a collecting box 32 is fixedly installed at the bottom of the sedimentation chamber 6, and the bottom of the collecting box 32 is connected to the mud suction pipe 11, a third mud discharge pipe 37 is fixedly installed at the first output end of the suction pump group 9, and the output end of the third mud discharge pipe 37 extends into the magnetic powder adding chamber 4, a first mud discharge pipe 12 is fixedly installed at the second output end of the suction pump group 9, and the output end of the first mud discharge pipe 12 is connected to the magnetic powder flocculant separator 13.

[0071] The first motor 10 is started, and the first motor 10 drives the stirring rod 101 to rotate, so as to stir the sewage.

[0072] In this embodiment, biochemically treated wastewater is added to the feed chamber 2, and activated sludge is added to the feed chamber 2, and then the feed chamber 2 and the first mixing chamber 3 are mixed, and then enter the magnetic powder adding chamber 4 after mixing, and the magnetic powder recovery and feeding integrated machine 14 adds sewage to the magnetic powder adding chamber 4 and magnetic powder, and then passes through the magnetic powder adding chamber 4 and the second mixing chamber 5 for mixing, and the mixture is discharged into the sedimentation chamber 6 for sedimentation, and the precipitated magnetic powder and the flocculants of the pollutants are precipitated and scraped into the collection box 32 by the sludge scraping unit, and then extracted by the suction pump group 9, and the suction pump group 9 returns a part of the activated sludge to the magnetic powder adding chamber 4 to maintain the activated sludge concentration inside the magnetic powder adding chamber 4, and then the other part of the flocculants is transmitted to the magnetic powder floc separator 13 for separation, and then discharged into the magnetic powder recovery and feeding integrated machine 14 to recover the magnetic powder, and then the recovered magnetic powder is put into the magnetic powder adding chamber 4 again by the magnetic powder recovery and feeding integrated machine 14, so as to circulate the feeding.

[0073] Reference Figure 4 , Figure 6-Figure 8The scraper unit includes a mounting shaft 22 rotatably mounted in the sedimentation chamber 6 , a scraper blade 34 is fixedly mounted at the bottom of the mounting shaft 22 , a second motor 21 is fixedly mounted on the top of the mounting box 1 , and an output end of the second motor 21 is fixedly connected to the mounting shaft 22 .

[0074] The second motor 21 is started, and the second motor 21 drives the installation shaft 22 to rotate, and the installation shaft 22 drives the scraper blade 34 to rotate to scrape the sediment into the collection box 32 .

[0075] Reference Figure 8 and Fig. 9 The disc filter 20 includes a bottom mesh plate 201, a first limiting ring 202 and a second limiting ring 203 are fixedly installed on the top of the bottom mesh plate 201, a top mesh plate 204 is fixedly installed on the top of the first limiting ring 202 and the second limiting ring 203 by bolts, and a filter disc 205 is fixedly installed in the filter box body composed of the bottom mesh plate 201, the first limiting ring 202, the second limiting ring 203 and the top mesh plate 204; a mounting ball 23 is fixedly connected to the mounting shaft 22, and the second limiting ring 203 is hinged to the mounting ball 23.

[0076] Among them, the filter disc 205 is one of zeolite molecular sieve or activated carbon. The sewage at the bottom passes through the bottom mesh plate 201 and then passes through the filter disc 205 and the top mesh plate 204. During this process, the micropores in the filter disc 205 continue to adsorb the particles in the wastewater to prevent particulate matter and impurities from being discharged into the drainage cavity 8.

[0077] Reference Figure 5 and Figure 6 The fixed telescopic rod 18 includes a piston cylinder 181 and a sliding rod 182. The sliding rod 182 is slidably connected to the piston cylinder 181. A first ball joint seat 17 is fixedly installed on the piston cylinder 181. The first ball joint seat 17 is fixedly connected to the top inner wall of the installation box 1. A second ball joint seat 19 is fixedly installed on the sliding rod 182. The second ball joint seat 19 is fixedly connected to the top mesh plate 204.

[0078] When the cleaning unit rotates, the fixed telescopic rod 18 fixes the disc filter 20. As the edge of the disc filter 20 rises and falls, the sliding rod 182 slides back and forth inside the piston cylinder 181, thereby preventing the disc filter 20 from axially rotating.

[0079] Reference Figure 7 and Figure 8 The cleaning unit includes a mounting seat 24 fixedly mounted on the mounting shaft 22, a mounting tube 25 is rotatably mounted on the mounting seat 24, a cleaning brush 26 is fixedly mounted on the mounting tube 25, a driven roller 251 is fixedly mounted on the mounting tube 25, the driven roller 251 is attached to the bottom mesh plate 201, a connecting plate 33 is fixedly mounted on the scraper blade 34, and the mounting tube 25 is rotatably connected to the connecting plate 33.

[0080] When the mounting shaft 22 rotates, the mounting shaft 22 cooperates with the scraper plate 34, the connecting plate 33 and the mounting seat 24 to drive the mounting tube 25 to rotate axially around the mounting shaft 22. During this process, the driven roller 251 drives the mounting tube 25 to rotate under the friction with the bottom mesh plate 201, thereby driving the cleaning brush 26 to rotate. The cleaning brush 26 is used to clean the bottom of the bottom mesh plate 201 and the bottom of the filter disc 205, further preventing the disc filter 20 from being blocked.

[0081] Reference Figure 5-Figure 8 The fixed telescopic rod 18 includes a piston cylinder 181 and a sliding rod 182. The sliding rod 182 extends into the piston cylinder 181 and is fixedly installed with a piston plate 183. A first ball joint seat 17 is fixedly installed on the piston cylinder 181, and the first ball joint seat 17 is fixedly connected to the top inner wall of the installation box 1. A second ball joint seat 19 is fixedly installed on the sliding rod 182, and the second ball joint seat 19 is fixedly connected to the top mesh plate 204; an air duct is opened in the installation shaft 22, and a second air pipe 31 is fixedly installed at the exhaust end of the piston cylinder 181. A second rotating joint 30 connected to the air duct is fixedly installed on the installation shaft 22, and the second air pipe 31 is fixedly connected to the rotating end of the second rotating joint 30; a first rotating joint 28 is fixedly installed on the installation tube 25, and a first air pipe 29 is fixedly installed at the rotating end of the first rotating joint 28, and the first air pipe 29 is connected to the air duct; an exhaust groove 27 is opened on the side wall of the installation tube 25, and the notch of the exhaust groove 27 faces the cleaning brush 26.

[0082] In this embodiment, a one-way valve is provided at both the output end and the input end of the piston cylinder 181. During the reciprocating sliding of the slide rod 182, the slide rod 182 drives the piston plate 183 to reciprocate and rise and fall inside the piston cylinder 181. During this process, the piston plate 183 absorbs external air, and then transmits it into the mounting tube 25 through the second air pipe 31, the second rotating joint 30, the air duct, the first air pipe 29 and the first rotating joint 28, and sprays it to the cleaning brush 26 through the exhaust groove 27 to flush the cleaning brush 26, so that the pollutants adsorbed on the cleaning brush 26 are separated from the cleaning brush 26, thereby ensuring the cleaning ability of the cleaning brush 26.

[0083] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A modular wastewater treatment magnetic flocculation device, comprising an installation box (1) provided with a pre-processing unit and a sedimentation chamber (6), characterized in that: Also includes: A columnar box (7) is fixedly installed in the precipitation chamber (6), and the columnar box (7) is communicated with the precipitation chamber (6); An annular seat (35) is fixedly mounted in the cylindrical box (7), and an arc groove is arranged on the inner side of the annular seat (35); A disc filter (20) is movably arranged on the annular seat (35), and a side wall of the disc filter (20) is provided with an arc edge, and the arc edge is coupled with the arc groove; A fixed telescopic rod (18) with two ends respectively hinged to the top inner wall of the sedimentation chamber (6) and the top of the disc filter (20); A sludge scraping unit, rotatably disposed in the sedimentation chamber (6); A cleaning unit is obliquely arranged in the cylindrical box (7), connected to the scraping unit and attached to the bottom wall of the disc filter (20); The scraping unit drives the cleaning unit to rotate about the rotation axis of the scraping unit, and the rotating cleaning unit lifts up one side of the disc filter (20) that is in contact with the cleaning unit.

2. A modular sewage treatment magnetic flocculation device according to claim 1, characterized in that: The pre-processing unit comprises a feed chamber (2), a first mixing chamber (3), a magnetic powder adding chamber (4), a second mixing chamber (5) and a drainage chamber (8) which are arranged in sequence from left to right in the installation box (1), and the precipitation chamber (6) is arranged between the second mixing chamber (5) and the drainage chamber (8); The feed chamber (2), the first mixing chamber (3), the magnetic powder adding chamber (4) and the second mixing chamber (5) are all provided with stirring mechanisms; A magnetic powder recovery and feeding integrated machine (14) and a magnetic powder flocculant separator (13) are fixedly installed on the top of the installation box (1); the magnetic powder recovery and feeding integrated machine (14) is used to feed magnetic powder into the magnetic powder adding chamber (4); the output end of the magnetic powder flocculant separator (13) is connected to the magnetic powder recovery and feeding integrated machine (14) via a second mud discharge pipe (15); and a discharge pipe (16) is fixedly installed at the output end of the magnetic powder recovery and feeding integrated machine (14); A drainage trough body (36) is fixedly installed in the installation box (1), and two ends of the drainage trough body (36) are connected to the sedimentation chamber (6) and the drainage chamber (8).

3. A modular sewage treatment magnetic flocculation device according to claim 2, characterized in that: The stirring mechanism comprises a first motor (10) fixedly mounted on the top of the installation box (1), and an output shaft of the first motor (10) extends into the chamber where a stirring rod (101) is fixedly mounted.

4. A modular sewage treatment magnetic flocculation device according to claim 3, characterized in that: The installation box (1) is provided with an installation cavity, a suction pump group (9) is fixedly installed in the installation cavity, a mud suction pipe (11) is fixedly installed at the input end of the suction pump group (9), a collecting box (32) is fixedly installed at the bottom of the sedimentation chamber (6), the bottom of the collecting box (32) is connected to the mud suction pipe (11), a third mud discharge pipe (37) is fixedly installed at the first output end of the suction pump group (9), the output end of the third mud discharge pipe (37) extends into the magnetic powder adding chamber (4), a first mud discharge pipe (12) is fixedly installed at the second output end of the suction pump group (9), and the output end of the first mud discharge pipe (12) is connected to the magnetic powder flocculant separator (13).

5. A modular sewage treatment magnetic flocculation device according to claim 1, characterized in that: The scraper unit comprises a mounting shaft (22) rotatably mounted in the sedimentation chamber (6), a scraper blade (34) being fixedly mounted on the bottom of the mounting shaft (22), a second motor (21) being fixedly mounted on the top of the mounting box (1), and an output end of the second motor (21) being fixedly connected to the mounting shaft (22).

6. A modular sewage treatment magnetic flocculation device according to claim 5, characterized in that: The disc filter (20) comprises a bottom mesh plate (201), a first limiting ring (202) and a second limiting ring (203) are fixedly mounted on the top of the bottom mesh plate (201), a top mesh plate (204) is fixedly mounted on the top of the first limiting ring (202) and the second limiting ring (203) by bolts, and a filter disc (205) is fixedly mounted in a filter box body composed of the bottom mesh plate (201), the first limiting ring (202), the second limiting ring (203) and the top mesh plate (204); A mounting ball (23) is fixedly connected to the mounting shaft (22), and the second limiting ring (203) is hinged to the mounting ball (23).

7. A modular sewage treatment magnetic flocculation device according to claim 6, characterized in that: The fixed telescopic rod (18) comprises a piston cylinder (181) and a sliding rod (182), wherein the sliding rod (182) is slidably connected to the piston cylinder (181), a first ball joint seat (17) is fixedly mounted on the piston cylinder (181), the first ball joint seat (17) is fixedly connected to the top inner wall of the installation box (1), a second ball joint seat (19) is fixedly mounted on the sliding rod (182), and the second ball joint seat (19) is fixedly connected to the top mesh plate (204).

8. A modular sewage treatment magnetic flocculation device according to claim 6, characterized in that: The cleaning unit comprises a mounting seat (24) fixedly mounted on the mounting shaft (22); a mounting tube (25) is rotatably mounted on the mounting seat (24); a cleaning brush (26) is fixedly mounted on the mounting tube (25); a driven roller (251) is fixedly mounted on the mounting tube (25); the driven roller (251) is in contact with the bottom mesh plate (201); a connecting plate (33) is fixedly mounted on the scraper plate (34); and the mounting tube (25) is rotatably connected to the connecting plate (33).

9. A modular sewage treatment magnetic flocculation device according to claim 8, characterized in that: The fixed telescopic rod (18) comprises a piston cylinder (181) and a sliding rod (182), wherein the sliding rod (182) extends into the piston cylinder (181) and is fixedly mounted with a piston plate (183), wherein a first ball joint seat (17) is fixedly mounted on the piston cylinder (181), wherein the first ball joint seat (17) is fixedly connected to the top inner wall of the mounting box (1), and a second ball joint seat (19) is fixedly mounted on the sliding rod (182), wherein the second ball joint seat (19) is fixedly connected to the top mesh plate (204); An air passage is provided in the installation shaft (22); a second air pipe (31) is fixedly installed at the exhaust end of the piston cylinder (181); a second rotating joint (30) in communication with the air passage is fixedly installed on the installation shaft (22); and the second air pipe (31) is fixedly connected to the rotating end of the second rotating joint (30); A first rotating joint (28) is fixedly mounted on the mounting tube (25), a first air pipe (29) is fixedly mounted on the rotating end of the first rotating joint (28), and the first air pipe (29) is connected to the airway; An exhaust groove (27) is provided on the side wall of the installation tube (25), and the notch of the exhaust groove (27) faces the cleaning brush (26).

10. A modular sewage treatment system, comprising the modular sewage treatment magnetic flocculation device according to claim 1, characterized in that: The following steps are involved: a. The sewage to be treated first enters the pretreatment module, and the pretreatment module is provided with a filtering device; b. The effluent from the pretreatment module enters the biochemical module, and the biochemical module is provided with an independent oxygen regulation zone and an aerobic zone, each zone is connected in sequence by a pipeline, and the effluent from the aerobic zone can be transported to the oxygen regulation zone through a reflux pipeline; c. If the effluent standard is higher than the Class A standard (GB18918-2002), anoxic zone II is set up. The HRT of anoxic zone II is 50% to 70% of the HRT of aerobic zone. The effluent of anoxic zone II can be transported to oxygen regulating zone I through reflux pipeline II. If anoxic zone II is set up, the effluent of aerobic zone does not need to be refluxed to oxygen regulating zone I. d. The oxygen regulating zone, aerobic zone and anoxic zone of the biochemical module are all provided with suspended fillers, the suspended filler HDPE type MBBR is provided in the oxygen regulating zone and the anoxic zone, and the suspended filler polyurethane is provided in the aerobic zone; e. When the total nitrogen in the influent exceeds 70 mg / L and the original process does not meet the standard, the original process is switched to the activated sludge process, the net cage in the biochemical module is hoisted out as a whole, and activated sludge cultivated in advance is added; f. When the influent organic matter concentration exceeds the designed influent concentration and the original process treatment fails to meet the standard, the oxygen adjustment zone 1 is adjusted to an anaerobic state, and an anaerobic-aerobic process or an anaerobic-aerobic-anoxic process is adopted; g. The effluent from the biochemical module enters the magnetic flocculation equipment, disinfection module, and effluent metering module in sequence for discharge.

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