Sewage metal impurity filtering and purifying treatment device

Abstract

The invention relates to the field of sewage treatment, in particular to a sewage metal impurity filtering and purifying treatment device which comprises a pressurizing box, a filtering tank is installed at the bottom of the pressurizing box through flange connection in a penetrating mode, and an activated carbon filter is installed in the filtering tank. The air flotation pipe is driven by the motor to rotate, micro-nano bubbles are released by the air outlet holes in the bottom of the air flotation pipe to complete air flotation, meanwhile, the movable barrel is driven by reciprocating threads of the pipe body to move up and down, strong eddy is formed through the communicating groove to achieve full mixing of chemicals, and the occupied area and energy consumption of the equipment are remarkably reduced through the integrated design; the movement of the movable barrel drives the brush in the hollow barrel to continuously scrape and brush the surface of the air floating pipe, so that the air outlet holes are effectively prevented from being blocked; the movable barrel further pushes a sealing push plate through a push cylinder, so that sewage is subjected to piston type pressure filtration through a filter frame and activated carbon in the filter tank, efficient backwashing is realized in combination with the filter frame capable of being automatically opened and a fan-shaped nozzle, and the service life of the activated carbon is remarkably prolonged while the filter speed is increased.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment, and more specifically to a wastewater metal impurity filtration and purification device. Background Technology

[0002] Wastewater treatment refers to the process of purifying wastewater generated from industrial, domestic, or agricultural activities using a combination of physical, chemical, and biological methods to ensure that the water quality meets discharge standards or is reusable. Its core objective is to remove pollutants from wastewater, such as organic matter, suspended solids, heavy metals, and pathogens, thereby protecting the aquatic environment, ecosystems, and human health, while simultaneously achieving the recycling of water resources.

[0003] In the invention patent application CN107324544B, published on August 18, 2020, entitled "A Filtration Device for Treating Industrial Heavy Metal Wastewater," this invention relates to the field of wastewater treatment technology, specifically to a filtration device for treating industrial heavy metal wastewater. The device includes a shell and a top cover. The top of the shell is open, and the top cover is located on top of the shell. Inside the shell, from top to bottom, are arranged a wastewater retention zone, a screen, a heavy metal adsorption layer, an organic matter adsorption layer, and a sterilization filtration layer. The shell also contains a negative pressure filtration chamber and a filter pipe. The negative pressure filtration chamber is located at the bottom of the top cover, and the top of the filter pipe communicates with the bottom of the negative pressure filtration chamber, while the bottom of the filter pipe communicates with the sterilization filtration layer. This invention provides a filtration device for treating industrial heavy metal wastewater. It has a simple structure, is easy to use, and can effectively remove solid impurities and heavy metal ions from wastewater while sterilizing it, ensuring that the treated purified water meets national standards. This is of great significance for promoting the reuse of water resources and reducing environmental pollution.

[0004] In the aforementioned patents or existing technologies, the mainstream process for treating wastewater from metal products typically employs flotation tanks or mixing tanks, forming a multi-unit series configuration with subsequent filtration and adsorption tanks. During this process, the high-impurity wastewater needs to be mixed with the treatment agents through stirring. However, traditional stirring methods often result in insufficient mixing and dead zones due to the viscosity or uneven composition of the wastewater, limiting the reaction efficiency of the agents in the wastewater and ultimately affecting the effluent quality. Furthermore, flotation equipment requires directly introducing air bubbles into the wastewater. Since the wastewater contains a large amount of suspended solids and colloidal substances, long-term operation can easily lead to blockages in the aeration areas, hindering the normal release and dispersion efficiency of the bubbles. In the subsequent activated carbon filtration stage, impurities that were not completely removed by the pre-treatment unit accumulate, especially easily forming physical blockages on the surface of the activated carbon filter bed, not only reducing the filtration flux but also significantly shortening the service life of the activated carbon.

[0005] Therefore, it is necessary to invent a wastewater metal impurity filtration and purification device to solve the above problems. Summary of the Invention

[0006] The purpose of this invention is to provide a wastewater metal impurity filtration and purification device. By integrating micro-nano air flotation, mechanical mixing, pipeline self-cleaning and pressurized filtration functions into a single device, and using mechanical linkage to achieve single power drive, this invention solves the problems of dispersed treatment units, large footprint, high energy consumption, insufficient reagent mixing, easy clogging of air flotation devices and frequent maintenance of activated carbon filter media in the prior art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a wastewater metal impurity filtration and purification device, comprising a booster box, a filter tank installed through the bottom of the booster box via a flange connection, an activated carbon filter installed inside the filter tank, an outlet pipe connected through the bottom of the filter tank, a booster filter assembly and a backwash assembly installed inside the booster box, the backwash assembly being located below the booster filter assembly, a support cylinder installed on the top of the booster box, a chemical mixing assembly installed inside the support cylinder, a support frame installed on the top of the support cylinder, inlet pipes symmetrically installed inside the support frame, automatic chemical dispensers symmetrically installed inside the support frame, the automatic chemical dispensers and inlet pipes being located above the chemical mixing assembly, a bag filter installed on one side of the booster box, a delivery pump installed on one side of the booster box, the output end of the delivery pump being connected to the internal pipeline of the booster box, and the input end of the delivery pump being connected to the internal pipeline of the bag filter.

[0008] In a preferred embodiment of the present invention, the drug mixing assembly includes a motor mounted above a support frame, a sealing cylinder mounted below the support frame and connected to an external micro / nano bubble generator, a rotatable connection below the support frame to an air flotation tube, and a sealing bearing fixedly connected through the lower part of the inner wall of the sealing cylinder, with the interior of the sealing bearing being sealed and fixedly connected to the air flotation tube.

[0009] As a preferred embodiment of the present invention, the surface of the air flotation tube located inside the sealing cylinder is provided with an air inlet groove in an annular distribution, the upper part of the surface of the air flotation tube is provided with a reciprocating thread, and the lower part of the surface of the air flotation tube is provided with an air outlet hole in an annular distribution downwards.

[0010] In a preferred embodiment of the present invention, a water storage tank is installed inside the bearing cylinder, and a connecting groove is provided in a ring on the inner wall of the water storage tank. A movable tank is fitted on the water storage tank, and the movable tank is connected to the inside of the bag filter by a flexible hose. Guide blocks are symmetrically installed on the outer side of the movable tank, and guide grooves are symmetrically provided on the inner wall of the bearing cylinder, and the guide grooves are slidably connected to the corresponding guide blocks.

[0011] As a preferred embodiment of the present invention, a hollow cylinder is installed on the lower part of the inner wall of the movable barrel, and the hollow cylinder is connected to the bottom of the water storage barrel through the hollow cylinder. A reciprocating moving block is installed on the upper part of the hollow cylinder, and the reciprocating moving block is engaged with a reciprocating thread. The hollow cylinder is sleeved with the air flotation tube. Multiple sets of brushes are installed in a ring on the inner wall of the hollow cylinder, and the brushes are in contact with the surface of the air flotation tube.

[0012] As a preferred embodiment of the present invention, the pressurized filtration assembly includes a push cylinder, which is installed at the bottom of the movable barrel and is connected through the top of the pressurization box. A sealing push plate is sleeved and fixed on the push cylinder, and the sealing push plate is located inside the pressurization box. The sealing push plate can completely cover the cross-section of the inner wall of the pressurization box. A limiting push rod is slidably connected inside the push cylinder. A spring is provided inside the push cylinder, and the two ends of the spring are respectively attached to the limiting push rod and the upper part of the inner wall of the push cylinder.

[0013] As a preferred embodiment of the present invention, a connecting plate is installed below the limiting push rod, and filter frames are symmetrically and rotatably connected to both sides of the connecting plate. The two sets of filter frames and the connecting plate can completely cover the cross section of the inner wall of the pressurization box. The filter frames and the connecting plate can only rotate in one direction. Multiple sets of sliding rods are rotatably connected to the lower side of the two sets of filter frames away from the connecting plate. Multiple sets of limiting holes are symmetrically opened on the inner wall of the pressurization box, and the limiting holes are slidably connected to the corresponding sliding rods for limiting.

[0014] As a preferred embodiment of the present invention, the backwashing assembly includes a trapezoidal frame, which is installed on the inner wall of the booster box, and the bend of the trapezoidal frame forms an annular space with the inner wall of the booster box. The trapezoidal frame is located below the filter frame. A drain valve is connected through the inner wall of the booster box, and the drain valve communicates with the annular space formed by the trapezoidal frame. The drain valve is connected to an external water pump pipe.

[0015] As a preferred embodiment of the present invention, multiple sets of fan-shaped nozzles are symmetrically installed in sequence within the trapezoidal frame, and two sets of fan-shaped nozzles are respectively located below two sets of filter frames. Both sides of the booster box are connected to water inlet valves, and the connection points of the water inlet valves are connected to the corresponding fan-shaped nozzles via pipes. Both sets of filter frames are slidably connected to scrapers, and both sets of scrapers are rotatably connected to both sides of the push cylinder via connecting arms.

[0016] Compared with the prior art, the technical effects and advantages provided by the present invention in the above technical solution are as follows: 1. By using a single motor to drive the flotation tube, multiple independent power units required for flotation, mixing, filtration, and pressurization in traditional wastewater treatment are replaced, thereby reducing wastewater treatment costs and improving treatment efficiency. Furthermore, in the wastewater mixing stage, the moving tank makes stable reciprocating motion within the storage tank, forcing the wastewater to undergo intense bidirectional exchange through the tank wall's connecting channels. This creates a large-scale, powerful vortex throughout the mixing chamber, far exceeding the effects of traditional mixing methods. This active, all-encompassing mixing mode ensures that the chemicals and wastewater come into full contact and react rapidly in a very short time, effectively solving the problem of poor wastewater-chemical mixing and treatment results caused by uneven mixing and dead zones. It also avoids the waste of chemicals and incomplete reactions during wastewater treatment, preventing the formation of flocs. This makes the overall wastewater treatment more stable and efficient, ensuring that the final effluent meets standards. 2. The continuous scraping of the flotation tube surface and air outlet by brushes moving up and down with the mobile tank effectively removes colloids and suspended solids from the wastewater, preventing clogging of the pores and ensuring the efficient separation of fine suspended solids from the wastewater. This avoids reduced treatment efficiency and frequent shutdowns due to clogging, ensuring the continuous and stable wastewater treatment process. In the filtration stage, pressure is applied to the wastewater, forcing it to quickly penetrate the filter unit. This increases the filtration speed and reduces sludge adhesion to the filter media surface, maintaining stable filtration flux. During backwashing, the system uses a linkage mechanism to drive scrapers to agitate the filter media, supplemented by high-pressure water flow, achieving thorough deep cleaning of the filter media. This effectively removes trapped organic pollutants and colloidal impurities, significantly extending the lifespan of activated carbon. This not only reduces system operating costs but, more importantly, ensures the long-term stability and compliance of the wastewater treatment system's effluent quality by guaranteeing the continuous and efficient adsorption and filtration performance of the filter media. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the planarized structure of the pressurization box of the present invention; Figure 3 This is a schematic diagram of the positional layout of the filter frame and trapezoidal frame of the present invention; Figure 4 This is a schematic diagram of the planed structure of the bearing cylinder of the present invention; Figure 5This is a schematic diagram of the hollowed-out cylinder planing structure of the present invention; Figure 6 This is a schematic diagram of the filter frame installation layout structure of the present invention; Figure 7 This is a schematic diagram of the fan-shaped nozzle installation layout structure of the present invention; Figure 8 This is a schematic diagram of the connection structure between the filter frame and the scraper of the present invention; Figure 9 This is a schematic diagram of the sealing pusher structure of the present invention; Figure 10 This is a schematic diagram of the disassembled structure of the mobile bucket and further water storage bucket of the present invention.

[0019] Explanation of reference numerals in the attached figures: 001. Pressure booster box; 101. Filter tank; 102. Support cylinder; 103. Support frame; 104. Water inlet pipe; 105. Automatic drug dispenser; 106. Bag filter; 107. Transfer pump; 108. Water outlet pipe; 002. Drug mixing assembly; 201. Motor; 202. Sealing cylinder; 203. Air flotation tube; 204. Air inlet groove; 205. Reciprocating thread; 206. Air outlet; 207. Hollowed-out cylinder; 208. Reciprocating moving block; 209. Moving tank; 210. Guide block; 211. Guide groove; 212. Water storage tank; 213. Connecting groove; 214. Brush; 215. Sealed bearing; 003. Pressure boosting filter assembly; 301. Push cylinder; 302. Sealing push plate; 303. Limiting push rod; 304. Spring; 305. Connecting plate; 306. Filter frame; 307. Slide rod; 308. Limiting hole; 004. Backwash assembly; 401. Trapezoidal frame; 402. Drain valve; 403. Fan-shaped nozzle; 404. Scraper; 405. Connecting arm; 406. Water inlet valve. Detailed Implementation

[0020] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0021] This invention provides, for example Figure 1-7The wastewater metal impurity filtration and purification device shown includes a booster box 001, a filter tank 101 connected to the bottom of the booster box 001 by a flange, an activated carbon filter installed inside the filter tank 101, an outlet pipe 108 connected to the bottom of the filter tank 101, a booster filter assembly 003 installed inside the booster box 001, a backwash assembly 004 installed inside the booster box 001 and located below the booster filter assembly 003, and a support cylinder 102 installed on the top of the booster box 001, containing a reagent. The mixing component 002 has a support frame 103 installed on top of the support cylinder 102. Water inlet pipes 104 are symmetrically installed inside the support frame 103. Automatic dispensing devices 105 are symmetrically installed inside the support frame 103. The automatic dispensing devices 105 and water inlet pipes 104 are located above the mixing component 002. A bag filter 106 is provided on one side of the pressurization box 001. A delivery pump 107 is installed on one side of the pressurization box 001. The output end of the delivery pump 107 is connected to the internal pipeline of the pressurization box 001, and the input end of the delivery pump 107 is connected to the internal pipeline of the bag filter 106.

[0022] The pre-treated wastewater in the bag filter 106 can be pumped into the booster tank 001 by the transfer pump 107. The inlet pipe 104 and the automatic dosing device 105 can allow the wastewater and chemicals to be added at the same time.

[0023] Furthermore, in the above structure, the drug mixing component 002 includes a motor 201, which is mounted above the support frame 103. A sealing cylinder 202 is installed below the support frame 103 and is connected to an external micro / nano bubble generator. The support frame 103 is rotatably connected to the air flotation tube 203 below. A sealing bearing 215 is fixedly connected through the lower part of the inner wall of the sealing cylinder 202, and the interior of the sealing bearing 215 is sealed and fixed through the air flotation tube 203.

[0024] The motor 201 can drive the air float tube 203 to rotate stably within the sealed bearing 215. The external micro-nano bubble generator can provide an air source for the sealed cylinder 202, and the sealed bearing 215 can ensure the dynamic sealing of the air float tube 203 when rotating at high speed, preventing leakage.

[0025] Furthermore, in the above structure, the surface of the air flotation tube 203 located inside the sealing cylinder 202 is provided with an air inlet groove 204 in an annular distribution, the upper part of the surface of the air flotation tube 203 is provided with a reciprocating thread 205, and the lower part of the surface of the air flotation tube 203 is provided with an air outlet hole 206 in an annular distribution downwards.

[0026] The rotating flotation tube 203 and its surface vent 206 can cut and disperse the gas from the micro-nano bubble generator into tiny bubbles and release them into the wastewater, achieving efficient flotation. At the same time, the reciprocating threads 205 on its surface convert the rotational motion into mechanical transmission, providing power for mixing and self-cleaning. The air inlet groove 204 ensures that the flotation tube 203 can continuously obtain gas from the sealed cylinder 202 during rotation.

[0027] Furthermore, in the above structure, a water storage tank 212 is installed inside the bearing cylinder 102. A connecting groove 213 is provided in a ring on the inner wall of the water storage tank 212. A movable tank 209 is fitted on the water storage tank 212, and the movable tank 209 is connected to the inside of the bag filter 106 by a flexible hose. Guide blocks 210 are symmetrically installed on the outside of the movable tank 209. Guide grooves 211 are symmetrically provided on the inner wall of the bearing cylinder 102, and the guide grooves 211 are slidably connected to the corresponding guide blocks 210.

[0028] Through the sliding engagement of guide block 210 and guide groove 211, the moving barrel 209 is restricted to only reciprocating up and down. The connecting groove 213 on the inner wall of water storage barrel 212 allows the liquid inside the moving barrel 209 to fully exchange with the liquid outside when it moves up and down, forming strong turbulence, which greatly enhances the mixing effect of the agent and sewage.

[0029] Furthermore, in the above structure, a hollow cylinder 207 is installed on the lower inner wall of the movable barrel 209, and the hollow cylinder 207 is connected to the bottom of the water storage barrel 212. A reciprocating moving block 208 is installed on the upper part of the hollow cylinder 207, and the reciprocating moving block 208 is engaged with the reciprocating thread 205. The hollow cylinder 207 is sleeved with the air flotation tube 203. Multiple sets of brushes 214 are installed in a ring on the inner wall of the hollow cylinder 207, and the brushes 214 are in contact with the surface of the air flotation tube 203.

[0030] By engaging the reciprocating moving block 208 with the reciprocating thread 205 on the air flotation tube 203, the rotational motion of the air flotation tube 203 can be converted into the up-and-down reciprocating motion of the hollow cylinder 207 and the entire moving barrel 209. The brush 214 installed on the inner wall of the hollow cylinder 207 continuously scrapes the surface of the air flotation tube 203 during the up-and-down motion, which can effectively clean the air outlet 206, achieve online self-cleaning, and prevent clogging.

[0031] Furthermore, in the above structure, the pressurized filter assembly 003 includes a push cylinder 301, which is installed at the bottom of the movable barrel 209 and is connected through to the top of the pressurized box 001. A sealing push plate 302 is sleeved and fixed on the push cylinder 301, and the sealing push plate 302 is located inside the pressurized box 001. The sealing push plate 302 can completely cover the inner wall section of the pressurized box 001. A limiting push rod 303 is slidably connected inside the push cylinder 301. A spring 304 is provided inside the push cylinder 301, and the two ends of the spring 304 are respectively attached to the limiting push rod 303 and the upper part of the inner wall of the push cylinder 301.

[0032] The up-and-down movement of the movable barrel 209 can drive the push cylinder 301 and the sealing push plate 302 to reciprocate synchronously within the pressurization box 001. When the sealing push plate 302 is pressed down, the spring 304 pushes the limit push rod 303 and subsequent components to pressurize the sewage in the box, forcing it to pass through the filter media in the filter frame 306, thus achieving pressurized filtration and significantly improving filtration efficiency.

[0033] Furthermore, in the above structure, a connecting plate 305 is installed below the limiting push rod 303. Filter frames 306 are symmetrically and rotatably connected to both sides of the connecting plate 305. The two sets of filter frames 306 and the connecting plate 305 can completely cover the inner wall section of the booster box 001. The filter frames 306 and the connecting plate 305 can only rotate in one direction. Multiple sets of slide rods 307 are rotatably connected to the lower side of the two sets of filter frames 306 away from the connecting plate 305. Multiple sets of limiting holes 308 are symmetrically opened on the inner wall of the booster box 001, and the limiting holes 308 are slidably connected to the corresponding slide rods 307.

[0034] The sliding connection between the slide rod 307 and the limiting hole 308 guides the filter frame 306 and the connecting plate 305 to be pressed down or lifted smoothly as a whole. The unidirectional rotation design of the filter frame 306 and the connecting plate 305 allows the water pressure to close and form a sealed filter surface when the filter is pressed down; when it needs to be backwashed and pulled up, it can be forcibly opened.

[0035] Furthermore, in the above structure, the backwashing assembly 004 includes a trapezoidal frame 401, which is installed on the inner wall of the booster box 001. The bend of the trapezoidal frame 401 forms an annular space with the inner wall of the booster box 001. The trapezoidal frame 401 is located below the filter frame 306. A drain valve 402 is connected through the inner wall of the booster box 001. The drain valve 402 communicates with the annular space formed by the trapezoidal frame 401 and is connected to an external water pump pipe.

[0036] The annular space formed by the trapezoidal frame 401 and the inner wall of the booster box 001 can collect backwash wastewater from above. The drain valve 402, which is connected to the external water pump pipeline, can generate negative pressure or directly deliver flushing water, thereby quickly discharging the collected wastewater from the system and completing the backwashing process.

[0037] Furthermore, in the above structure, multiple sets of fan-shaped nozzles 403 are symmetrically installed in sequence inside the trapezoidal frame 401, and the two sets of fan-shaped nozzles 403 are respectively located below the two sets of filter frames 306. Both sides of the booster box 001 are connected to water inlet valves 406, and the connection of the water inlet valves 406 is connected to the corresponding fan-shaped nozzles 403 by pipes. Both sets of filter frames 306 are limited and slidably connected to scrapers 404, and both sets of scrapers 404 are rotatably connected to both sides of the push cylinder 301 by connecting arms 405.

[0038] High-pressure clean water can enter the fan-shaped nozzle 403 through the water inlet valve 406, causing the fan-shaped nozzle 403 to spray upwards and flush the opened filter frame 306 with high pressure. Because the filter frame 306 is open, the flushing water can flow smoothly into the trapezoidal frame 401. At the same time, the up-and-down moving push cylinder 301 drives the scraper 404 to move and clean inside the filter frame 306 through the connecting arm 405, thereby further preventing the filter frame 306 from becoming blocked and ensuring that the backwashing is thorough and efficient.

[0039] like Figure 1-7 As shown, when sewage treatment is required, the staff needs to transport the sewage to the storage tank 212 at the top of the support cylinder 102 through the inlet pipe 104. At the same time, the automatic dosing device 105 adds flocculants and other agents. Then, the motor 201 is started and connected to the external micro-nano bubble generator. At this time, the motor 201 drives the flotation tube 203 to rotate at high speed in the sealed bearing 215. The gas from the generator enters the flotation tube 203 through the air inlet groove 204 and is finally released into the sewage in the form of micro-nano bubbles from the air outlet 206 at the bottom, completing the flotation treatment and causing suspended impurities to form scum.

[0040] Meanwhile, the rotating flotation tube 203, through the cooperation of its reciprocating threads 205 and reciprocating moving block 208, drives the entire hollow cylinder 207 and moving bucket 209 to begin a stable up-and-down reciprocating motion under the constraint of guide block 210 and guide groove 211. During this process, the up-and-down movement of the moving bucket 209 causes the liquid inside to exchange violently with the external liquid through the connecting groove 213 on the inner wall of the water storage bucket 212, forming a strong vortex, thereby allowing the agent and sewage to be fully mixed. At the same time, multiple sets of brushes 214 fixed on the inner wall of the hollow cylinder 207 move up and down with the moving bucket 209, continuously scraping the surface of the flotation tube 203, effectively preventing the air outlet 206 from being blocked, and achieving online self-cleaning.

[0041] After flotation and mixing, the water is transported via a hose to a bag filter 106 for preliminary filtration to remove larger particles. Then, under the action of a pump 107, the pre-filtered wastewater is transported to a booster tank 001. At this time, the continuous up-and-down movement of the moving tank 209 drives the sealing push plate 302 to reciprocate in a piston-like motion within the booster tank 001 via the push cylinder 301. When the sealing push plate 302 is pressed down, the spring 304 pushes the limit push rod 303 and the connecting plate 305, thereby causing the filter frames 306 on both sides to overcome the water flow resistance and close downwards. Under the action of the sealing push plate 302, pressure is applied to the wastewater in the tank, forcing it to pass quickly through the filter frames 306 to filter out the impurities inside. At the same time, the water filtered through the filter frames 306 enters the filter tank 101 below under pressure for final deep adsorption purification, and is finally discharged through the outlet pipe 108.

[0042] When backwashing is required, the control system adjusts the inlet valve 406. During the upward movement of the moving tank 209 and the pusher 301, the inlet valve 406 opens, and high-pressure clean water is sprayed upward through the fan-shaped nozzle 403. At the same time, the upward-moving pusher 301 pulls the scraper 404 to move inside the filter frame 306 through the connecting arms 405 on both sides. Under the pulling force of the connecting plate 305, the two sides of the filter frame 306 open. At this time, the high-pressure water flow sprayed from the fan-shaped nozzle 403 works together with the open filter frame 306 and the moving scraper 404 to flush the inside of the filter frame 306, removing the trapped pollutants. The wastewater generated during flushing is collected by the trapezoidal frame 401 below and finally discharged from the system through the drain valve 402, completing the entire backwashing process.

[0043] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A wastewater metal impurity filtration and purification device, comprising a booster tank (001), characterized in that: The bottom of the booster box (001) is connected by a flange to a filter tank (101), and an activated carbon filter is installed inside the filter tank (101). A water outlet pipe (108) is connected to the bottom of the filter tank (101). A booster filter assembly (003) is installed inside the booster box (001). A backwash assembly (004) is installed inside the booster box (001), and the backwash assembly (004) is located below the booster filter assembly (003). A support cylinder (102) is installed on the top of the booster box (001). A reagent mixing assembly (002) is installed inside the support cylinder (102). 02) A support frame (103) is installed on the top. Water inlet pipes (104) are symmetrically installed inside the support frame (103). Automatic dispensing devices (105) are symmetrically installed inside the support frame (103). The automatic dispensing devices (105) and water inlet pipes (104) are located above the drug mixing assembly (002). A bag filter (106) is provided on one side of the pressurization box (001). A delivery pump (107) is installed on one side of the pressurization box (001). The output end of the delivery pump (107) is connected to the internal pipe of the pressurization box (001), and the input end of the delivery pump (107) is connected to the internal pipe of the bag filter (106).

2. The wastewater metal impurity filtration and purification device according to claim 1, characterized in that: The drug mixing assembly (002) includes a motor (201), which is mounted above a support frame (103). A sealing cylinder (202) is installed below the support frame (103), and the sealing cylinder (202) is connected to an external micro-nano bubble generator. The support frame (103) is rotatably connected to the air flotation tube (203) below. A sealing bearing (215) is fixedly connected through the lower part of the inner wall of the sealing cylinder (202), and the interior of the sealing bearing (215) is sealed and fixed through the air flotation tube (203).

3. The wastewater metal impurity filtration and purification device according to claim 2, characterized in that: The air flotation tube (203) located inside the sealing cylinder (202) has an air inlet groove (204) distributed in a ring. The upper part of the air flotation tube (203) has a reciprocating thread (205). The lower part of the air flotation tube (203) has an air outlet hole (206) distributed in a ring downwards.

4. The wastewater metal impurity filtration and purification device according to claim 1, characterized in that: A water storage tank (212) is installed inside the bearing cylinder (102). A connecting groove (213) is provided in a ring on the inner wall of the water storage tank (212). A movable tank (209) is fitted on the water storage tank (212). The movable tank (209) is connected to the inside of the bag filter (106) by a flexible hose. Guide blocks (210) are symmetrically installed on the outside of the movable tank (209). Guide grooves (211) are symmetrically provided on the inner wall of the bearing cylinder (102). The guide grooves (211) are slidably connected to the corresponding guide blocks (210).

5. The wastewater metal impurity filtration and purification device according to claim 4, characterized in that: A hollow cylinder (207) is installed on the lower part of the inner wall of the movable barrel (209), and the hollow cylinder (207) is connected to the bottom of the water storage barrel (212). A reciprocating moving block (208) is installed on the upper part of the hollow cylinder (207), and the reciprocating moving block (208) is engaged with the reciprocating thread (205). The hollow cylinder (207) is sleeved with the air flotation tube (203). Multiple sets of brushes (214) are installed in a ring on the inner wall of the hollow cylinder (207), and the brushes (214) are in contact with the surface of the air flotation tube (203).

6. The wastewater metal impurity filtration and purification device according to claim 1, characterized in that: The pressurized filter assembly (003) includes a push cylinder (301), which is installed at the bottom of the movable barrel (209) and is connected through the top of the pressurized box (001). A sealing push plate (302) is sleeved and fixed on the push cylinder (301), and the sealing push plate (302) is located inside the pressurized box (001). The sealing push plate (302) can completely cover the inner wall section of the pressurized box (001). A limiting push rod (303) is slidably connected inside the push cylinder (301). A spring (304) is provided inside the push cylinder (301), and the two ends of the spring (304) are respectively attached to the limiting push rod (303) and the upper part of the inner wall of the push cylinder (301).

7. The wastewater metal impurity filtration and purification device according to claim 6, characterized in that: A connecting plate (305) is installed below the limiting push rod (303). Filter frames (306) are symmetrically rotatably connected to both sides of the connecting plate (305). The two sets of filter frames (306) and the connecting plate (305) can completely cover the inner wall section of the booster box (001). The filter frames (306) and the connecting plate (305) can only rotate in one direction. Multiple sets of slide rods (307) are rotatably connected to the side of the two sets of filter frames (306) away from the connecting plate (305). Multiple sets of limiting holes (308) are symmetrically opened on the inner wall of the booster box (001). The limiting holes (308) are slidably connected to the corresponding slide rods (307).

8. The wastewater metal impurity filtration and purification device according to claim 1, characterized in that: The backwashing assembly (004) includes a trapezoidal frame (401), which is installed on the inner wall of the booster box (001). The bend of the trapezoidal frame (401) forms an annular space with the inner wall of the booster box (001). The trapezoidal frame (401) is located below the filter frame (306). A drain valve (402) is connected through the inner wall of the booster box (001). The drain valve (402) and the annular space formed by the trapezoidal frame (401) are connected to each other. The drain valve (402) is connected to the external water pump pipe.

9. The wastewater metal impurity filtration and purification device according to claim 8, characterized in that: Multiple sets of fan-shaped nozzles (403) are symmetrically installed in the trapezoidal frame (401) in sequence, and the two sets of fan-shaped nozzles (403) are located below the two sets of filter frames (306) respectively. Both sides of the booster box (001) are connected to water inlet valves (406), and the water inlet valves (406) are connected to the corresponding fan-shaped nozzles (403) by pipes. Both sets of filter frames (306) are connected to scrapers (404) in a limited sliding manner, and both sets of scrapers (404) are rotatably connected to the two sides of the push cylinder (301) by connecting arms (405).

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