WO2012034485A1 - Stacked-barrel-type magnetic wastewater separation and purification device - Google Patents

Abstract

A stacked-barrel-type magnetic wastewater separation and purification device comprising a magnetic absorption separator (3), a drive mechanism, a slag scraping mechanism, a slag discharging mechanism, and a water charging and discharging mechanism. The magnetic absorption separator (3) consists of two or more concentric magnetic barrels (9) having different diameters, wherein each magnetic barrel (9) circumferentially consists of a magnetic absorption area (9.1) provided with a magnet (18) and a non-magnetic slag discharging area (9.2) provided with no magnet (18), and the space between two adjacent magnetic barrels (9) forms a waste water drain (10). The slag scraping mechanism comprises a slag scraping blade (4.1), an overflow-proof sheet (4.2), a drive arm (4), and a drive frame (12); the slag discharging mechanism consists of a slag collector (11), a slag storing chamber (22), and a slag discharging pipe arranged at the bottom of the tank (1), wherein the slag storing chamber (22) is internally provided with an anti-hardening blade (16). The slag scraping blade (4.1) and the overflow-proof sheet (4.2) are arranged in the waste water drain (10) between adjacent magnetic barrels (9). The concentric magnetic barrel structure of the non-magnetic slag discharging area (9.2), combined with the slag scraping mechanism, enables a continuous operation of the magnet (18) in full immersion. The slag absorption ability of the magnet (18) is exploited to their best advantage, and the fluctuations in the density of magnetic suspended substances in the waste water can be addressed by adjusting the number of slag scraping blades (4.1).

Description

 Stacking type magnetic separation and purification wastewater device

 The invention relates to a stacked magnetic separation and purification wastewater device, and belongs to the technical field of magnetic separation and purification wastewater for continuously separating ferromagnetic substances from waste water.

Background technique

 Metallurgical and mine wastewater often contain a large amount of ferromagnetic impurities. In order to achieve recycling or effluent of wastewater, it is necessary to remove ferromagnetic impurities, and magnetic separation technology is a well-known technology suitable for such wastewater treatment. With the development of technology, magnetic separation has also been used in non-magnetic wastewater treatment in recent years, that is, the magnetic powder and the chemical agent are first added to flocculate the magnetic powder and the pollutants in the waste water, and then the magnetic separation device is used to flocculate the mixture from the wastewater. The impurities are adsorbed and separated to purify the wastewater. Whether dealing with iron-containing or non-magnetic wastewater, the key to magnetic separation technology is the performance of the equipment itself, including separation capacity (separation accuracy, ie, concentration of effluent), processing capacity (handling capacity), and automation of continuous operation. And floor space, investment costs, etc. The performance of a magnetic separation purification device depends mainly on two factors: the integration (assembly) of the magnet and the slag removal method. The organic combination of the two factors determines the type and performance of the magnetic separation device. The development process of magnetic separation and purification wastewater equipment is a process of continuous breakthrough, improvement and improvement of the above two factors, thereby improving the removal capacity of suspended solids, improving wastewater treatment capacity, reducing floor space, and reducing equipment investment costs. At present, the magnetic separation and purification wastewater equipment in engineering applications is mainly divided into three types according to the integration method of magnets. One is the magnetic rod separation and purification equipment, the other is the magnetic drum separation and purification wastewater equipment, and the third is the disk separation and purification wastewater equipment. Magnetic rod separation and purification equipment has high magnetic field strength and is suitable for the separation of ultra-fine magnetic impurities. However, it is difficult to remove slag, and it is difficult to adapt to the continuous processing requirements of large water volume. The magnetic drum separation and purification equipment consists of a magnetic drum, a waste water tank and a scraping slag. The waste water flows through the outer surface of the magnetic drum, and the magnetic particles (or magnetic flocs) in the waste water are adsorbed and separated by the magnetic drum. The magnetic drum separating device has a simple structure, is convenient to manufacture, and has stable automatic operation, but the processing amount is small. American Journal of Engineers and Architects (ASE A Journal 1977

Volume 50 Nomber 6) "Magnadisc a new industrial wastewater treatment system for use in the iron and steel industry", which uses a magnetic disk to separate and purify wastewater. Magnetic separation is a reality for large water treatment. Patent (ZL92108011.5) discloses a disk separation and purification wastewater device, which is composed of a plurality of magnetic disks. The magnet used is a rare earth permanent magnet, and the waste water flows through the gap between the disks, and the ferromagnetic particles in the waste water are adsorbed by the disk. The wastewater is purified. The disk separation and purification equipment has the advantage of large wastewater treatment capacity, but has the same disadvantages as the magnetic rod type and the drum type magnetic separation equipment: the magnet in the equipment is only partially immersed in the waste water, and the slag absorption ability of all the magnets is not fully exerted. Therefore, the investment cost of the equipment, The floor space has not been optimal. On the other hand, the magnetic separation and purification wastewater devices known at present have the problem of insufficient impact load resistance, that is, when the slag content of the wastewater fluctuates greatly, the concentration of suspended solids in the effluent may increase, and it is difficult to ensure that the effluent water quality meets the requirements.

Summary of the invention

 In view of the deficiencies of the existing magnetic separation and purification wastewater equipment, the object of the present invention is to provide a slag absorption capacity, a large treatment amount, a small footprint, a low investment cost, a strong impact load resistance capability, and a continuous operation. The magnetic separation and purification device, that is, the stacked magnetic separation and purification wastewater device.

 In order to achieve the above object, the present invention adopts the following technical solutions: The stacked magnetic separation and purification wastewater device provided by the present invention comprises a magnetic adsorption separator, a transmission mechanism, a scraping mechanism, a slag discharging mechanism, and a water inlet and drainage mechanism, wherein The magnetic adsorption separator is vertically placed on a separator support frame located in the middle of the tank body and fixed to the inner wall of the tank; the magnetic adsorption separator is composed of two or more concentric magnetic cylinders of different diameters and has the smallest diameter The bottom of the magnetic cylinder is provided with an inner cylinder sealing baffle, wherein each magnetic cylinder is composed of a magnetic adsorption zone in which a magnet is arranged and a non-magnetic slag discharge zone in which the magnet is not disposed, and all the magnetic cylinders are non-magnetic. The magnetic slag discharge area is arranged in a line along the radial direction of the magnetic cylinder, and the gap between the adjacent magnetic cylinders constitutes a waste water flow passage; the transmission mechanism is a bracket placed on the top of the tank body, a motor mounted on the bracket, and a motor The speed reducer and the transmission shaft driven by the motor reducer; the scraping mechanism comprises a transmission frame driven by the transmission shaft, mounted on the transmission frame and vertically placed in the waste water a transmission arm in the track, a scraper blade mounted on the transmission arm, and an anti-slip piece fixed on the transmission arm at an upper end provided at a front end of the scraper blade moving direction, the scraping blade is in contact with the surface of the magnetic cylinder; The motor reducer drives the transmission frame to rotate, and the scraping slag piece mounted on the transmission arm rotates in the waste water flow path to scrape off the slag adsorbed on the surface of the magnetic cylinder; the anti-slip piece is arranged at the front end of the scraping slag moving direction, in order to prevent the magnetic cylinder from being removed from the magnetic cylinder The surface scraped slag is re-mixed into the waste water and adsorbed or mixed into the effluent by the magnetic cylinder; in the radial direction, the width of the defensive sheet is smaller than the width of the waste water passage; the slag scraping sheet, the smashing sheet and the magnetic cylinder surface are three Forming a vertical channel; the slag discharging mechanism is composed of a slag collecting tank, a slag storage chamber and a slag discharging pipe arranged at the bottom of the tank body, and the slag storage chamber is separated by a partition plate and a cone-shaped tank bottom The slag collecting tank is fixed on the separator bracket, and the port on the slag collecting tank corresponds to the lower end of the non-magnetic slag discharging area, and the lower port of the slag collecting tank is connected to the opening of the partitioning plate and communicates with the slag storage chamber; Non-magnetic operation of the scraper blade to the magnetic cylinder In the slag zone, the slag discharge pipe is opened, and since the magnet is not arranged in the non-magnetic slag discharge zone, the slag is not magnetically adsorbed, and the slag scraped off by the scraper slag piece is formed along the surface of the scraping slag piece, the smashing piece and the magnetic cylinder surface. The vertical channel descends into the slag trap tank, flows into the slag storage chamber through the slag trap tank, and is finally discharged through the slag discharge pipe.

The water inlet and outlet mechanism is composed of an inlet pipe, a water inlet hood and an outlet pipe, and the inlet moisture hood is fixed at the bottom of the inner cylinder sealing baffle, and the inlet pipe, the inlet water flow hood, the bottom plate and the bottom of the magnetic adsorption separator The formed cavity, the waste water flow channel and the outlet pipe are connected in sequence, and the iron-containing wastewater or the non-magnetic waste water is fed by the inlet pipe after the magnetic powder and the medicament are flocculated. The moisture flow hood enters the cavity formed by the separator and the bottom of the magnetic adsorption separator through the moisture flow hood, and then enters the waste water flow channel of the magnetic adsorption separator, and is separated and purified from the upper end of the magnetic adsorption separator by magnetic adsorption separation and purification. Discharged through the outlet pipe.

 The slag chamber is provided with an anti-construction blade, and the transmission shaft passes through the central hole of the inner cylinder sealing baffle of the smallest diameter magnetic cylinder and the inlet moisture flow hood, and is fixedly connected with the anti-seaming blade through the central hole of the partition plate The drive shaft drives the anti-construction blade to rotate to prevent slag deposition inside the slag cavity; the contact portion of the drive shaft with the inner cylinder sealing baffle and the central hole of the baffle is sealed.

 Two or more non-magnetic slag discharge zones may be disposed on each magnetic cylinder, and correspondingly, the non-magnetic slag discharge zones of all the magnetic cylinders are arranged in a straight line along the radial direction of the magnetic cylinder as two or more groups, and each group is not A slag collecting tank is arranged at the lower end of the magnetic slag discharging zone, and the lower port of the slag collecting tank communicates with the slag storage cavity through the partition plate. The number of sets of non-magnetic slag-removing zones can be increased to avoid excessive slag accumulation in the vertical channels formed by the scraping slag, the smash-proof sheet and the surface of the magnetic cylinder, thereby reducing the load on the scraping slag.

 In the case that the scraping speed of the scraping slab is constant, the scraping cycle (that is, the time required for the slag adsorbed on the surface of the magnetic cylinder to be scraped off once) is inversely proportional to the number of scraping slag pieces, that is, by increasing the number of scraping slag pieces, Shorten the scraping cycle. When treating wastewater with little change in magnetic suspension concentration, the number of scraping slag pieces is determined according to the design value of the concentration of influent suspended solids; when used to treat wastewater with large fluctuations in magnetic suspension concentration, the number of scraping slag pieces can be set to a certain value. The surplus amount relatively shortens the scraping cycle to avoid the surface of the magnetic cylinder being reduced due to the accumulation of too thick slag, thereby reducing the slag absorption capacity and affecting the separation precision, resulting in an increase in the concentration of the effluent suspended solids. Therefore, in the present invention, the scraping slag is not limited to one set, that is, the slag scraping mechanism can be set to two or more groups according to the characteristics of the slag content of the wastewater.

 Preferably, the magnetic cylinder is composed of a magnet, a magnet supporting skeleton and a cover plate, wherein the magnet supporting frame is a cylindrical frame welded by a stainless steel strip, and is composed of a magnet supporting ring and a magnet strut, and the cover plate is made of stainless steel plate. The cylinder is a permanent magnet, and the magnet is placed on the magnet support ring and closed by the inner and outer cover plates, and the upper and lower ends of the cover plate are sealingly connected with the upper and lower ends of the magnet support frame. The scraping slag is in elastic contact with the cover of the magnetic cylinder.

 Most preferably, the length of the scraping slab designed by the present invention is 0.9 to 1.0 times the height of the magnetic cylinder.

 Most preferably, the scraper blade of the present invention is a U-shaped, V-shaped or flat plate made of a stainless steel sheet, a copper sheet or a polyurethane sheet.

 Most preferably, the length of the flap of the present invention is equal to or greater than the length of the scraper.

 Most preferably, the circumferential distance of the defragmentation piece and the squeegee blade in each set of scraping mechanism designed by the present invention is equal to or smaller than the circumferential width of the non-magnetic slag discharge zone.

 The process of separating and purifying wastewater by the apparatus of the present invention is achieved as follows:

The iron-containing wastewater, or non-magnetic wastewater, is added to the tank by the inlet pipe after the flocculation of the magnetic powder and the medicament, and the water flow After the shunt is diverted, it enters the waste water channel of the magnetic adsorption separator. The slag is adsorbed on the surface of the magnetic cylinder by the magnetic adsorption zone of the magnetic cylinder. After the wastewater is purified, it is discharged from the upper end of the magnetic adsorption separator through the outlet pipe; the scraping slag and the anti-slip sheet are in the motor. The reducer drives the waste water channel to rotate, and the scraping scraper scrapes off the slag adsorbed on the surface of the magnetic cylinder and brings it into the non-magnetic slag discharge zone, and the slag discharge pipe is opened, and the slag is scraped from the scraping slag, the smashing piece and the surface of the magnetic cylinder. The vertical channel formed by the person falls into the slag collecting tank, flows into the slag storage chamber through the slag collecting tank, and is finally discharged through the slag discharge pipe; when the scraping slag piece enters the magnetic adsorption zone again, the slag discharging pipe is closed, and the scraping slag piece continues to rotate. Scrape.

 The stacked magnetic separation and purification wastewater device provided by the invention has the following characteristics:

 (1) The integrated method of multi-layer concentric magnetic cylinders provided with non-magnetic slag discharge areas, all concentric magnetic cylinders are completely immersed in waste water to continuously adsorb and separate ferromagnetic substances, and the slag absorption ability of all the magnets can be exerted.

 (2) The non-magnetic slag discharge zone provided on the magnetic cylinder, together with the scraping slag piece, the anti-slip sheet, the slag collecting tank, the slag storage chamber and the slag discharge pipe, constitutes a slag discharge channel, so that the slag is relatively separated from the waste water, preventing slag After separating from the magnetic cylinder, it enters the wastewater again to ensure the separation effect.

 (3) The amount of the scraping slab may be set to a certain margin to accommodate the fluctuation of the slag amount, and thus the apparatus of the invention has a strong impact load resistance.

 (4) The multi-layer concentric magnetic cylinder is compact in structure, and the number of magnetic cylinders is not limited, so that it can meet the requirements of large processing capacity.

 The concentric magnetic cylinder structure provided with the non-magnetic slag discharging area provided by the invention realizes the continuous operation of the full immersion of the magnet together with the slag scraping mechanism, the slag absorbing ability of all the magnets is exerted, and the number of scraping slag pieces is not in the structural form The limitation can be set to a certain margin to adapt to the fluctuation of slag volume. Therefore, the equipment has a compact structure, small investment, low investment cost, large processing capacity, strong impact load resistance and good separation effect. Waste water plant.

DRAWINGS

 BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a front elevational view showing the structure of the present invention.

 Figure 2 is a top plan view of the structure of the present invention.

 Figure 3 is a schematic view of the magnet support skeleton.

 Figure 4 is a schematic cross-sectional view of the magnetic cylinder (the magnet support skeleton is not shown).

 In the figure, 1. tank body, 2. separator support frame, 3. magnetic adsorption separator, 4. transmission arm, 4.1. scraping slag, 4.2. defensive sheet, 5. inlet moisture hood, 6. inlet pipe, 7. Outlet pipe, 8. Slag discharge pipe, 9. Magnetic cylinder, 9.1. Magnetic adsorption zone, 9.2. Non-magnetic slag discharge zone, 10. Wastewater flow channel, 11. Slag collector, 12. Transmission frame, 13. Transmission Shaft, 14. Motor reducer, 15. Bracket, 16. Anti-construction blade, 17. Separator, 18. Magnet, 19. Magnet support ring, 20. Magnet strut, 21. Cover plate, 22. Slag chamber, 23. Cavity, 24. Motor, 25. Inner cylinder sealing baffle.

detailed description

 The embodiments are given below in conjunction with the accompanying drawings to further illustrate the invention.

As shown in FIG. 1, the stacked magnetic separation and purification wastewater device provided in this embodiment is supported by the tank body 1 and the separator. The frame 2, the magnetic adsorption separator 3, the transmission mechanism, the scraping mechanism, the inlet moisture hood 5, the inlet pipe 6, the outlet pipe 7, the slag collecting tank 11, the anti-construction blade 16, and the slag discharging pipe 8 are composed. The separator support frame 2 is a spoke frame made of steel, the separator support frame 2 is located in the middle of the can body 1 and fixed on the inner wall of the can body 1, and the magnetic adsorption separator 3 is vertically placed on the separator support frame 2.

 2 and FIG. 1, the magnetic adsorption separator 3 is composed of two or more concentric magnetic cylinders 9 of different diameters, and the bottom of the magnetic cylinder having the smallest diameter is provided with an inner cylinder sealing baffle 25 to prevent waste water from being discharged therefrom. The water is directly discharged into the water outlet pipe 7 without separation and purification; the gap between the adjacent concentric magnetic cylinders 9 is the waste water flow channel 10.

 As shown in FIG. 4 and FIG. 2, each of the magnetic cylinders 9 is composed of a magnetic attraction zone 9.1 and a non-magnetic slag zone 9.2 in the circumferential direction, the magnetic adsorption zone 9.1 is covered with the magnet 18, and the non-magnetic slag zone 9.2 is not arranged. Magnets; the non-magnetic slag-removing areas 9.2 of all the magnetic cylinders 9 are arranged in a line along the radial direction of the magnetic cylinder; of course, the present invention can also uniformly arrange two or more non-magnetics in the circumferential direction on each of the magnetic cylinders 9. The slag discharge zone 9.2, correspondingly, the non-magnetic slag discharge zones 9.2 of all the magnetic cylinders 9 are arranged in a straight line along the radial direction of the magnetic cylinder into two or more groups. 1 and 2, the transmission mechanism is composed of a bracket 15 placed on the top of the can body 1, a motor 24 mounted on the bracket 15, a motor reducer 14 and a transmission shaft 13 driven by the motor reducer 14; The slag mechanism includes a transmission frame 12 driven by the transmission shaft 13, a transmission arm 4 mounted on the transmission frame 12 and vertically placed in the waste water flow path 10, a scraping slag plate 4.1 mounted on the transmission arm 4, and a scraping slag The upper end of the sheet 4.1 is disposed at the front end of the moving direction and is fixed on the arm 4 of the transmission arm 4. The length of the scraping scraper 4.1 is equal to 0.9 to 1.0 times the height of the magnetic cylinder 9. The scraping scraper 4.1 is made of non-magnetic stainless steel sheet. U-shaped, V-shaped or flat plate made of copper or polyurethane sheet. The length of the barrier sheet 4.2 is equal to or greater than the length of the scraper blade 4.1; in the radial direction, the width of the barrier sheet 4.2 is smaller than the width of the waste water channel 10; the direction of the barrier sheet 4.2 and the scraper blade 4.1 in the scraper mechanism The distance is equal to or smaller than the hoop width of the non-magnetic slag-removing zone 9.2; the blister sheet 4.2 is made of a non-magnetically permeable stainless steel plate. The scraping slab 4.1, the defensive sheet 4.2 and the surface of the cylinder form a vertical passage.

 The inlet moisture hood 5 is fixed to the bottom of the inner cylinder sealing baffle 25 of the smallest diameter magnetic cylinder, and the inlet moisture hood 5 is a flared stainless steel perforated tube, and the inlet pipe 6, the inlet moisture hood 5, and the tank body 1 are The partition plate 17 is in turn in communication with the chamber 23 formed by the bottom of the magnetic adsorption separator, the waste water passage 10, and the outlet pipe 7.

 A slag collecting tank 11 is disposed under each group of non-magnetic slag discharging areas 9.2, and the upper port of the slag collecting tank 11 corresponds to the lower end of the non-magnetic slag discharging area 9.2, and the lower port of the slag collecting tank 11 is formed by the partition plate 17 and the tapered type. The slag chamber 22 formed by the bottom of the tank is communicated; the slag chamber 22 is provided with anti-construction blades 16, and the transmission shaft 13 passes through the inner cylinder sealing baffle 25 and the inlet moisture hood 5 and passes through the partition 17 The center hole is fixedly connected with the anti-seaming blade 16; the contact portion of the transmission shaft 13 with the inner cylinder sealing baffle 25 and the central hole of the partition plate 17 is sealed (dynamically sealed).

As shown in FIG. 3 and FIG. 1, the magnetic cylinder 9 is composed of a magnet 18, a magnet supporting skeleton, and a cover plate 21, wherein the magnet The support frame is a cylindrical frame welded by a non-magnetic magnetic stainless steel strip, and is composed of a magnet support ring 19 and a magnet support 20, and the magnet 18 is placed on the magnet support ring 19 and closed by the inner and outer cover plates 21, and the cover plate 21 is up and down. The end is welded to the upper and lower ends of the magnet support frame. The magnet 18 is a permanent magnet such as ferrite or neodymium iron boron. The cover plate 21 is a thin-walled cylinder made of a non-magnetic stainless steel plate, but the inner surface cover plate of the smallest diameter of the magnetic cylinder is a cylinder made of steel plate and the inner cylinder sealing baffle 25 made of steel plate is welded at the bottom to prevent waste water. From here, it is directly separated into the water outlet pipe 7 without being separated and purified; wherein the inner cylinder sealing baffle 25 is centrally opened, and the transmission shaft 13 drives the anti-construction blade 16 to rotate through the central hole (moving seal) to the lower portion of the tank body 1.

 When the equipment is in operation, the iron-containing wastewater or the non-magnetic waste water is flocculated by the addition of the magnetic powder and the medicament, and the inlet pipe 6 passes through the moisture flow hood 5 and enters the cavity formed by the partition plate 17 and the bottom of the magnetic adsorption separator in the tank body 1. The body 23 then flows into the magnetic adsorption separator 3, and the slag is adsorbed on the surface of the magnetic cylinder by the magnetic adsorption zone 9.1 of the magnetic cylinder. After the wastewater is purified, it is discharged from the upper end of the magnetic adsorption separator 3 through the outlet pipe 7; the scraping slag 4.1 and the defensive sheet 4.2 Rotating along the waste water channel 10 under the driving of the motor 24 and the motor reducer 14, the scraper slag 4.1 scrapes off the slag adsorbed on the surface of the magnetic cylinder 9 and carries it into the non-magnetic slag discharge zone 9.2, at which time the slag discharge pipe 8 is opened. The vertical passage formed by the slag from the scraper slag 4.1, the smear 4.2 and the surface of the magnetic cylinder falls into the slag trap 11 and the slag chamber 22, and is discharged through the slag discharge pipe 8; when the scraper slab 4.1 enters the magnetic adsorption zone again 9.1 When the slag discharge pipe 8 is closed, the slag scraping plate 4.1 continues to rotate the scraping slag along the waste water flow passage 10.

 The present invention can be implemented by designing, processing, and assembling according to the above-mentioned drawings and specific embodiments, but the above-mentioned embodiments are not to be construed as limiting the scope of the present invention, and therefore, those skilled in the art The non-essential improvement and adjustment made by the above design concept and content of the present invention (such as fixing the magnetic cylinder in the present invention, changing the rotation of the scraping mechanism to the fixing of the scraping mechanism, rotating the magnetic cylinder, etc.) should also belong to the protection of the present invention. range.

Claims

Claim A stacked magnetic separation and purification waste water device, comprising a magnetic adsorption separator (3), a transmission mechanism, a scraping mechanism, a slagging mechanism, and an inlet and outlet mechanism, wherein:  The magnetic adsorption separator (3) is vertically placed on a separator support frame (2) located in the middle of the tank body (1) and fixed to the inner wall of the tank body (1); the magnetic adsorption separator (3) is composed of two One or more concentric magnetic cylinders (9) of different diameters are formed, and the bottom of the magnetic cylinder having the smallest diameter is provided with an inner cylinder sealing baffle (25), wherein each magnetic cylinder (9) is arranged with a magnet in the circumferential direction The magnetic adsorption zone (9.1) and a non-magnetic slag zone (9.2) without a magnet are arranged in two parts, and the non-magnetic slag zone (9.2) of all the magnetic cylinders (9) are arranged in a straight line along the radial direction of the magnetic cylinder. a group, the gap between adjacent magnetic cylinders (9) constitutes a waste water channel (10);  The transmission mechanism is composed of a bracket (15) placed on the top of the tank body (1), a motor speed reducer (14) mounted on the bracket (15), and a transmission shaft (13) driven by the motor speed reducer (14);  The scraping mechanism comprises a transmission frame (12) driven by a transmission shaft (13), a transmission arm (4) mounted on the transmission frame (12) and vertically placed in the waste water flow path (10), and mounted on the transmission a scraper blade (4.1) on the arm (4), and a flap (4.2) fixed to the upper end of the scraper blade (4.1) in the direction of movement of the scraper (4); in the radial direction, the anti-defense The width of the escape piece (4.2) is smaller than the width of the waste water channel (10);  The slag discharging mechanism is composed of a slag collecting tank (11), a slag storage chamber (22), and a slag discharge pipe (8) provided at the bottom of the tank body (1), and the slag storage chamber (22) is partitioned by a partition (17). And the cone bottom is sealed; the slag tank (11) is fixed on the separator support frame (2), and the slag tank (11) upper port and non-magnetic slag area (9.2) The lower end is correspondingly corresponding, and the lower port of the slag collecting tank (11) is connected to the opening of the partition plate (17) and communicates with the slag chamber (22); the slag chamber (22) is provided with anti-construction blades (16) , the drive shaft (13) passes through the central hole of the inner cylinder sealing baffle (25) and the inlet moisture hood (5), and is fixedly connected to the anti-construction blade (16) through the central hole of the partition plate (17); The shaft (13) is in sealing engagement with the contact portion of the inner cylinder sealing baffle (25) and the central hole of the partition plate (17);  The water inlet and outlet mechanism is composed of an inlet pipe (6), a water inlet hood (5) and an outlet pipe (7), and the inlet moisture hood (5) is fixed to the bottom of the inner cylinder sealing baffle (25), and the water inlet pipe (6), a moisture flow hood (5), a cavity (23) formed by a partition (17) and a bottom of the magnetic adsorption separator (3) in the tank body (1), a waste water flow path (10), and an outlet pipe (7) Connect in sequence. 2. The stacked magnetic separation and purification wastewater device according to claim 1, wherein: each of the magnetic cylinders (9) is provided with two or more non-magnetic slag discharge zones (9.2), correspondingly Non-magnetic slag area of all magnetic cylinders (9) (9.2) Two or more groups are arranged in a straight line along the radial direction of the magnetic cylinder.  The stacked magnetic separation and purification wastewater device according to claim 1, wherein the scraping mechanism is two or more sets.  4. The stacked magnetic separation and purification wastewater device according to claim 1, wherein: the magnetic cylinder (9) is composed of a magnet (18), a magnet supporting skeleton, and a cover plate (21), wherein the magnet supports The cylindrical frame welded by the stainless steel strip is composed of a magnet support ring (19) and a magnet support (20). The magnet (18) is placed on the magnet support ring (19) and the inner and outer cover plates (21) are used. Closed, the cover plate is a cylinder made of stainless steel plate, and the upper and lower ends of the cover plate (21) are sealingly connected with the upper and lower ends of the magnet support frame; the magnet (18) is a permanent magnet.  The stacked magnetic separation and purification wastewater apparatus according to claim 4, wherein the scraping slag (4.1) is in elastic contact with the cover (21) of the magnetic cylinder (9).  The stacked magnetic separation and purification wastewater device according to claim 1 or 5, characterized in that the length of the scraping slab (4.1) is 0.9 to 1.0 times the height of the magnetic cylinder (9).  The stacked magnetic separation and purification wastewater device according to claim 1 or 5, wherein the scraping slag (4.1) is a U-shaped or a V-shaped stainless steel sheet, a copper sheet or a polyurethane sheet. Or tablet.  8. The stacked magnetic separation and purification wastewater device according to claim 6, wherein: the scraping blade (4.1) is a U-shaped, V-shaped or flat plate made of stainless steel, copper or polyurethane sheets.  9. The stacked magnetic separation and purification wastewater device according to claim 1, wherein: the anti-slip sheet The length of (4.2) is equal to or greater than the length of the scraper (4.1).  10. The stacked magnetic separation and purification wastewater apparatus according to claim 1, wherein: a circumferential distance between the defragmentation piece (4.2) and the scraping slab (4.1) in the slag scraping mechanism is equal to or smaller than The circumferential width of the non-magnetic slag zone (9.2).