Industrial wastewater treatment device with heavy metal recovery function

Abstract

The invention relates to the technical field of wastewater treatment, and provides an industrial wastewater treatment device with a heavy metal recovery function, the industrial wastewater treatment device comprises: a sedimentation tank used for carrying out heavy metal chemical sedimentation work for wastewater treatment, the bottom side of the sedimentation tank is fixedly connected with a plurality of sleeves, and the interiors of the sleeves are slidably connected with precipitated sludge collection heads; the top ends of the settled sludge collecting heads penetrate through the bottom side of the inner wall of the settling pond, and the plurality of settled sludge collecting heads are controlled by a lifting roller to do reciprocating lifting work so as to collect heavy metal sludge settled along the slope of the inner wall of the settling pond. When wastewater is precipitated, precipitated heavy metal sludge collection work can be synchronously carried out, the heavy metal sludge is subjected to dehydration treatment in a unified manner, the telescopic pipe which stretches and retracts in a reciprocating manner can simulate peristalsis and contraction of intestinal tracts, and the situation that the heavy metal sludge enters the telescopic pipe and then is accumulated and blocked can be prevented in cooperation with the rubber protrusions; the conveying of the heavy metal sludge is accelerated.

Description

Technical Field

[0001] The invention relates to the technical field of wastewater treatment, in particular to an industrial wastewater treatment device with a heavy metal recovery function. Background Art

[0002] With the acceleration of industrialization, wastewater generated in industrial production processes has caused serious environmental pollution, especially wastewater containing heavy metals, such as copper, lead, zinc, antimony, etc. These heavy metals are extremely harmful to the environment and human health. They are difficult to degrade naturally in the environment and can be accumulated and amplified through the food chain, posing a long-term threat to the ecosystem and human health. Therefore, the research and application of industrial wastewater treatment technology is particularly important, especially the recovery and removal technology of heavy metals.

[0003] In the existing industrial wastewater heavy metal recovery work, the heavy metal precipitates generated will sink to the bottom of the sedimentation tank. Only after the wastewater treatment is completed can it be recycled, resulting in the continuous accumulation of sludge inside the sedimentation tank, which reduces the capacity of the sedimentation tank, affects the wastewater treatment volume, and reduces the wastewater treatment efficiency. Therefore, an industrial wastewater treatment device with heavy metal recovery function is needed. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides an industrial wastewater treatment device with heavy metal recovery function, which solves the problem that the existing industrial wastewater heavy metal recovery work can only be carried out after the wastewater treatment is completed, and the heavy metal sludge recovery treatment affects the wastewater treatment capacity.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0006] An industrial wastewater treatment device with heavy metal recovery function, comprising:

[0007] A sedimentation tank is used for heavy metal chemical precipitation of wastewater treatment. A plurality of sleeves are fixedly connected to the bottom side of the sedimentation tank. A sedimentation sludge collecting head is slidably connected to the inside of the sleeve. The top of the sedimentation sludge collecting head penetrates the bottom side of the inner wall of the sedimentation tank. The plurality of sedimentation sludge collecting heads are controlled by lifting rollers to perform reciprocating lifting and lowering to collect heavy metal sludge that settles down along the slope of the inner wall of the sedimentation tank.

[0008] A heavy metal recovery chamber, which is located at the bottom side of the sedimentation tank and receives the heavy metal sludge collected by the sedimentation sludge collecting head through a plurality of telescopic tubes fixed on the top side, performs secondary filtration through the filter assembly inside the heavy metal recovery chamber to separate out the water in the heavy metal sludge, and prevents the heavy metal sludge from causing blockage with the assistance of a cleaning roller;

[0009] A suction tank, wherein the suction tank is fixedly connected to the right side of the heavy metal recovery chamber, a suction pipe 2 is fixedly connected to the front side of the suction tank, the suction pipe 2 is connected to the front top opening of the sedimentation tank through a pipeline, the left bottom end of the suction tank is connected to the right side of the heavy metal recovery chamber through multiple suction pipes 1, the top side of the suction tank reciprocates through a traction roller to pull multiple piston pumps to slowly suck the heavy metal recovery chamber and the sedimentation tank, and pump water into the interior of the heavy metal recovery chamber, a discharge pipe is fixedly connected to the rear side of the heavy metal recovery chamber, a branch pipe is fixedly connected to the outer wall of the sedimentation tank, a plurality of injection nozzles are fixedly connected to the inner periphery of the branch pipe, and the injection nozzles penetrate the inner wall of the sedimentation tank, the discharge pipe transports water to the branch pipe connected to the plurality of injection nozzles through a connecting pipe, and the injection nozzles are used to spray water to impact the heavy metal sludge accumulated on the inclined surface of the inner wall of the sedimentation tank;

[0010] The traction roller, the cleaning roller and the lifting roller are connected through a belt and three pulleys, and the lifting roller driven by the motor drives the traction roller and the cleaning roller to rotate together.

[0011] Preferably, the lifting roller includes a rotating rod 1 fixedly connected to the top side of the heavy metal recovery chamber, a plurality of abutment wheels are fixedly connected to the outer wall of the rotating rod 1, the contour of the abutment wheel is elliptical, and an abutment frame is fixedly connected to the adjacent side of the four adjacent sedimentation sludge collection heads, and the outer wall of the abutment wheel abuts against the bottom side of the abutment frame.

[0012] Preferably, the filter assembly comprises a filter cartridge fixedly connected to the inside of the heavy metal recovery chamber, the top opening of the filter cartridge is located at the bottom side of the telescopic tube, and the outer wall of the filter cartridge is sleeved with a filter cloth.

[0013] Preferably, the cleaning roller includes a rotating rod 2 located inside the filter cartridge, the front end of the rotating rod 2 passes through the front side of the heavy metal recovery chamber and is rotatably connected to the heavy metal recovery chamber, and a plurality of scraping frames are fixedly connected on both sides of the outer wall of the rotating rod 2. The scraping frames clean the inner wall of the filter cartridge with the cooperation of the cleaning kit to prevent clogging.

[0014] Preferably, the cleaning kit comprises a scraper head and a brush head, the scraper frames on both sides are centrally symmetrical, the scraper head is fixedly connected to one end of the scraper frame, and the brush head is fixedly connected to the other end of the scraper frame.

[0015] Preferably, the piston pump comprises a plurality of cylinders fixedly connected to the top side of the suction tank, and a piston is slidably connected inside the cylinder.

[0016] Preferably, the traction roller includes a rotating rod three rotatably connected to the top side of the suction tank, the rotating rod three is located at the left end of the top side of the cylinder, the top of the cylinder is rotatably connected with a turntable, the turntable is connected to the gear through two meshing gears, and the turntable and the top side of the piston are connected through a connecting rod.

[0017] Preferably, one of the pulleys is fixedly connected to the front side of rotating rod one, another pulley is fixedly connected to the front side of rotating rod two, and the remaining pulley is fixedly connected to the front side of rotating rod three, the size of the remaining pulley is larger than the sizes of the other two pulleys, and the driving end of the motor is fixedly connected to the rear side of rotating rod one.

[0018] Preferably, a plurality of rubber protrusions are fixedly connected to the inner wall of the telescopic tube to transport the heavy metal sludge inside during the stretching and contraction movement of the telescopic tube.

[0019] Preferably, a detachable filter plate is provided at the top of the inner wall of the sedimentation tank to separate and screen out the uppermost layer of suspended clear liquid.

[0020] Working principle: Pour the industrial wastewater after pH adjustment and preliminary filtration into the sedimentation tank, add the chemical precipitant used to separate the heavy metals dissolved in the water, so that the heavy metals are precipitated from the water and become heavy metal sludge. After a period of precipitation, cover the filter plate, start the motor, and drive the motor to rotate the rotating rod 1, and then drive the rotating rod 2 and the rotating rod 3 to rotate through the belt and three pulleys;

[0021] When the rotating rod rotates, it will drive the abutment wheel connected thereto to rotate synchronously, so that the elliptical abutment wheel abuts against the abutment frame along the edge, and the abutment frame connected to the sedimentation sludge collecting head is subjected to force, so that the abutment frame rises and falls along the edge line of the abutment wheel, thereby causing the sedimentation sludge collecting head to move up and down reciprocatingly, and driving the telescopic tube connected thereto to perform a reciprocating telescopic movement, so that the top of the sedimentation sludge collecting head with an opening enters the bottom end of the sedimentation tank, and the heavy metal sludge settled inside the bottom end of the sedimentation tank enters the interior of the sedimentation sludge collecting head under the action of water pressure, and enters the heavy metal recovery chamber along the sedimentation sludge collecting head through the interior of the connected telescopic tube, and the telescopic tube accelerates the process of the sludge entering the heavy metal recovery chamber by simulating peristalsis to prevent blockage;

[0022] The heavy metal sludge entering the heavy metal recovery chamber will enter the filter cartridge, and the water entering with the sludge will be separated from the sludge by the filter cartridge and filter cloth and stored in the heavy metal recovery chamber.

[0023] When the rotating rod 2 rotates, it will drive the scraper frame connected thereto to rotate, so that the scraper frame uses the scraper head to scrape the inner wall of the filter cylinder and uses the brush head to brush the inner wall, thereby breaking up the sludge accumulated on the inner wall to prevent it from over-accumulating and maintain the filtration and separation of water;

[0024] The rotating rotating rod 3 rotates through two meshing gear transmission turntables during the rotation process, so that the connecting rod driven by the turntable moves the eccentric wheel structure, and the piston connected to the connecting rod on the bottom side is pulled back and forth to perform a reciprocating lifting and lowering movement, thereby causing the piston to reciprocate inside the cylinder body, causing the pressure inside the suction tank connected to the cylinder body to change. When the piston rises, a negative pressure is generated inside the suction tank, so that the suction pipe 1 and the suction pipe 2 connected to the suction tank synchronously generate negative pressure, so that the suction pipe 1 attracts the water inside the heavy metal recovery chamber connected to it, and the suction pipe 2 attracts the water in the upper layer of the sedimentation tank through the pipeline and pours it into the suction tank. When the piston descends, the pressure inside the heavy metal recovery chamber increases, and the water flows out through the discharge pipe, and enters the branch pipe along the pipeline connected to the discharge pipe by pressure, and is sprayed out along the opening of the spray nozzle, and the heavy metal sludge accumulated on the inclined surface of the inner wall of the sedimentation tank is impacted by the impact force of the high-pressure water flow, and is guided to accumulate at the bottom end of the sedimentation tank.

[0025] The upper suspended clear liquid of the wastewater filter plate that has completed heavy metal treatment is discharged, and the wastewater treatment is repeatedly added and processed. By opening the hatch on the rear side of the heavy metal recovery chamber, the rear opening of the filter cartridge can be exposed, and the heavy metal precipitated sludge is uniformly cleaned out from the inside of the filter cartridge and moved to other processes for metal recovery treatment.

[0026] The present invention provides an industrial wastewater treatment device with heavy metal recovery function.

[0027] Beneficial effects:

[0028] 1. The present invention can collect the precipitated heavy metal sludge simultaneously when the wastewater is precipitated, and dehydrate the heavy metal sludge uniformly. The telescopic tube that reciprocates can simulate the peristalsis and contraction of the intestine. With the rubber protrusion, it can prevent the heavy metal sludge from entering the interior of the telescopic tube and causing accumulation and blockage, thereby accelerating the transportation of the heavy metal sludge. It can also prevent the heavy metal sludge from excessive accumulation while separating water from the heavy metal sludge, thereby stabilizing the precipitation work.

[0029] 2. The present invention can reutilize the water content of the recovered heavy metal sludge. While returning it to the sedimentation tank for recycling, it can also be used to impact the slope accumulated in the sedimentation tank to guide the precipitated sludge to flow to the bottom of the sedimentation tank, so that the sludge accumulated on the slope sinks faster to the bottom of the sedimentation tank, thereby accelerating the sludge collection process. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 A perspective view of the present invention;

[0031] Figure 2 It is a schematic diagram of the position of the motor of the present invention;

[0032] Figure 3 It is a schematic diagram of the internal structure of the sedimentation tank of the present invention;

[0033] Figure 4 It is a schematic diagram of the mechanism of the sedimentation sludge collecting head of the present invention;

[0034] Figure 5 It is a schematic diagram of the position of the abutment wheel of the present invention;

[0035] Figure 6 It is a schematic diagram of the internal structure of the telescopic tube of the present invention;

[0036] Figure 7 It is a schematic diagram of the internal structure of the heavy metal recovery chamber of the present invention;

[0037] Figure 8 It is a schematic diagram of the connection structure of the gears of the present invention;

[0038] Fig. 9 It is a schematic diagram of the connection structure of the suction tank of the present invention;

[0039] Fig.10 It is a schematic diagram of the connection structure of the suction tank and the sedimentation tank of the present invention.

[0040] Among them, 1. sedimentation tank; 2. heavy metal recovery chamber; 3. suction tank; 4. sedimentation sludge collection head; 5. sleeve; 6. telescopic tube; 7. abutment frame; 8. rotating rod one; 9. abutment wheel; 10. filter cartridge; 11. filter cloth; 12. rotating rod two; 13. scraper frame; 14. scraper head; 15. brush head; 16. rotating rod three; 17. gear; 18. turntable; 19. cylinder; 20. piston; 21. suction pipe one; 22. suction pipe two; 23. discharge pipe; 24. branch pipe; 25. spray nozzle; 26. filter plate. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] Example:

[0043] The embodiment of the present invention provides an industrial wastewater treatment device with a heavy metal recovery function, comprising:

[0044] Please see attached Figure 1 -Attached Figure 3 , a sedimentation tank 1 is used for heavy metal chemical precipitation work of wastewater treatment, a plurality of sleeves 5 are fixedly connected to the bottom side of the sedimentation tank 1, a sedimentation sludge collecting head 4 is slidably connected inside the sleeve 5, the top of the sedimentation sludge collecting head 4 penetrates the bottom side of the inner wall of the sedimentation tank 1, and the plurality of sedimentation sludge collecting heads 4 are controlled by lifting rollers to perform reciprocating lifting and lowering work to collect the heavy metal sludge settled along the slope of the inner wall of the sedimentation tank 1, and the slope helps to guide the precipitated heavy metal sludge to the bottom end of the sedimentation tank 1;

[0045] Please see attached Figure 3 -Attached Figure 5 The lifting roller includes a rotating rod 8 fixedly connected to the top side of the heavy metal recovery chamber 2, and a plurality of abutment wheels 9 are fixedly connected to the outer wall of the rotating rod 8. The contour of the abutment wheel 9 is elliptical, and an abutment frame 7 is fixedly connected to the adjacent side of the four adjacent sedimentation sludge collection heads 4, and the outer wall of the abutment wheel 9 abuts against the bottom side of the abutment frame 7.

[0046] Specifically, the connection of the sleeve 5 and the connection of the sludge collecting head 4 and the sedimentation tank 1 are all sealed to prevent water from seeping out. When the rotating rod 8 rotates, it will drive the contact wheel 9 connected thereto to rotate synchronously, so that the elliptical contact wheel 9 abuts against the contact frame 7 along the edge, and the contact frame 7 connected to the sludge collecting head 4 is subjected to force, so that the contact frame 7 rises and falls along the edge line of the contact wheel 9, and then the sludge collecting head 4 moves up and down reciprocatingly, and drives the telescopic tube 6 connected thereto to perform reciprocating telescopic movements, so that the top of the sludge collecting head 4 with an opening enters the bottom end of the sedimentation tank 1, and the heavy metal sludge settled inside the bottom end of the sedimentation tank 1 enters the inside of the sludge collecting head 4 with the water under the action of water pressure, and enters the heavy metal recovery chamber 2 along the sludge collecting head 4 through the inside of the connected telescopic tube 6. Lubricating oil is provided between the abutting wheel 9 and the abutting frame 7 to reduce the force loss caused by friction, so that the abutting wheel 9 can lift up the abutting frame 7 more easily, thereby extending the service life of the abutting wheel 9 and the abutting frame 7.

[0047] Please see attached Figure 2 and attached Figure 7 The heavy metal recovery chamber 2 is located at the bottom side of the sedimentation tank 1, and receives the heavy metal sludge collected by the sedimentation sludge collecting head 4 through a plurality of telescopic tubes 6 fixed on the top side, and performs secondary filtration through the filtering components inside the heavy metal recovery chamber 2 to precipitate the water in the heavy metal sludge, and with the assistance of the cleaning roller, prevents the heavy metal sludge from causing blockage, so as to accelerate the precipitation rate and improve the treatment efficiency;

[0048] The filter assembly includes a filter cartridge 10 fixedly connected to the inside of the heavy metal recovery chamber 2, the top opening of the filter cartridge 10 is located at the bottom side of the telescopic tube 6, the outer wall of the filter cartridge 10 is sleeved with a filter cloth 11, and the cleaning roller includes a rotating rod 12 located inside the filter cartridge 10, the front end of the rotating rod 12 passes through the front side of the heavy metal recovery chamber 2, and is rotatably connected to the heavy metal recovery chamber 2, and multiple scraping frames 13 are fixedly connected on both sides of the outer wall of the rotating rod 12, and the scraping frames 13 clean the inner wall of the filter cartridge 10 with the cooperation of the cleaning kit to prevent clogging. The cleaning kit is composed of a scraper head 14 and a brush head 15, and the scraper frames 13 on both sides are centrally symmetrical, the scraper head 14 is fixedly connected to one end of the scraper frame 13, and the brush head 15 is fixedly connected to the other end of the scraper frame 13.

[0049] Specifically, the heavy metal sludge entering the heavy metal recovery chamber 2 will enter the interior of the filter cartridge 10, and the water entering together with the sludge will be separated from the sludge under the filtration of the filter cartridge 10 and the filter cloth 11, and stored in the heavy metal recovery chamber 2, wherein the filter cloth 11 can be disassembled and replaced, and in addition, a hatch with sealing ability is provided on the rear side of the heavy metal recovery chamber 2, and after the heavy metal treatment of the wastewater is completed, the hatch can be opened to uniformly clean out the heavy metal precipitation sludge from the interior of the filter cartridge 10. When the rotating rod 12 rotates, it will drive the scraper frame 13 connected thereto to rotate, so that the scraper frame 13 uses the scraper head 14 to scrape the inner wall of the filter cartridge 10, and uses the brush head 15 to brush the inner wall, thereby breaking up the sludge accumulated on the inner wall, preventing it from over-accumulating, and maintaining the filtering and separation of water, and the scraper head 14 and the brush head 15 can be disassembled and replaced.

[0050] Please see attached Figure 3 , Attachment Figure 8 and attached Fig. 9, a suction tank 3, the suction tank 3 is fixedly connected to the right side of the heavy metal recovery chamber 2, the front side of the suction tank 3 is fixedly connected with a suction pipe 22, the suction pipe 22 is connected to the front top opening of the sedimentation tank 1 through a pipeline, the left bottom end of the suction tank 3 is connected to the right side of the heavy metal recovery chamber 2 through multiple suction pipes 1 21, the top side of the suction tank 3 reciprocates through the traction roller to pull multiple piston pumps to slowly suck the heavy metal recovery chamber 2 and the sedimentation tank 1, and the water is pumped into the heavy metal recovery chamber 2, the rear side of the heavy metal recovery chamber 2 is fixedly connected with a discharge pipe 23, the outer wall of the sedimentation tank 1 is fixedly connected with a branch pipe 24, the inner periphery of the branch pipe 24 is fixedly connected with a plurality of injection nozzles 25, and the injection nozzles 25 penetrate the sedimentation tank 1 The inner wall of the suction tank 1, the discharge pipe 23 transports water to the branch pipe 24 connected to a plurality of spray nozzles 25 through the connecting pipe, and the spray nozzles 25 are used to spray water to impact the heavy metal sludge accumulated on the inclined surface of the inner wall of the sedimentation tank 1, wherein the connection of the suction tank 3 is sealed so that it is in a state where no external air can enter, and the inner walls of the suction pipe 1 21, the suction pipe 22 and the discharge pipe 23 are all provided with a one-way valve diaphragm for one-way passage to prevent the backflow of the sucked water and the discharged water, and the topmost height of the pipe connected to the suction pipe 22 is higher than the height of the top plane of the sedimentation tank 1, so as to prevent the phenomenon of the connecting pipe automatically guiding the flow of water, and prevent the water in the sedimentation tank 1 from actively entering the suction tank 3 through the pipe;

[0051] Please see attached Figure 8 -Attached Fig.10 The piston pump includes a plurality of cylinders 19 fixedly connected to the top side of the suction tank 3, a piston 20 is slidably connected inside the cylinder 19, and the traction roller includes a rotating rod 3 16 rotatably connected to the top side of the suction tank 3, the rotating rod 3 16 is located at the left end of the top side of the cylinder 19, and a turntable 18 is rotatably connected to the top of the cylinder 19, and the turntable 18 is connected to the gear 17 through two meshing gears 17, and the turntable 18 and the top side of the piston 20 are connected through a connecting rod to form an eccentric wheel structure.

[0052] Specifically, during the rotation process, the rotating rotating rod 3 16 will drive the rotating disc 18 to rotate through two meshing gears 17, so that the connecting rod driven by the rotating disc 18 moves the eccentric wheel structure, and reciprocatingly pulls the piston 20 connected to the connecting rod on the bottom side to perform reciprocating lifting and lowering movements, thereby causing the piston 20 to reciprocate inside the cylinder 19, causing the pressure inside the suction tank 3 connected to the cylinder 19 to change. When the piston 20 rises, negative pressure is generated inside the suction tank 3, so that the suction pipe 1 21 and the suction pipe 2 22 connected to the suction tank 3 synchronously generate negative pressure, so that The suction pipe 1 21 attracts the water inside the heavy metal recovery chamber 2 connected to it, so that the suction pipe 2 22 attracts the water in the upper layer of the sedimentation tank 1 through the pipeline and pours it into the suction tank 3. When the piston 20 descends, the pressure inside the heavy metal recovery chamber 2 increases, and the water flows out through the discharge pipe 23. By pressure, it enters the branch pipe 24 along the pipeline connected to the discharge pipe 23 and is sprayed out along the opening of the injection nozzle 25. The impact force of the high-pressure water flow is used to impact the heavy metal sludge accumulated on the inclined surface of the inner wall of the sedimentation tank 1, and guides it to accumulate at the bottom end of the sedimentation tank 1.

[0053] Please refer to the attached Figure 1 , Attachment Figure 4 and attached Figure 7 The traction roller, cleaning roller and lifting roller are connected by belts and three pulleys, and the lifting roller driven by the motor drives the traction roller and the cleaning roller to rotate together, one of the pulleys is fixedly connected to the front side of the rotating rod 8, another pulley is fixedly connected to the front side of the rotating rod 2 12, and the remaining pulley is fixedly connected to the front side of the rotating rod 3 16. The size of the remaining pulley is larger than that of the other two pulleys to slow down the rotation speed of the traction roller used to drive the suction work, thereby avoiding the suction frequency being too high, synchronously affecting the frequency of pouring water into the spray nozzle 25, and thus avoiding the excessively high frequency of water flow disturbing the sedimentation work of the wastewater. The driving end of the motor is fixedly connected to the rear side of the rotating rod 8.

[0054] Please refer to the attached Figure 6 The inner wall of the telescopic tube 6 is fixedly connected with a plurality of rubber protrusions to transport the heavy metal sludge inside during the stretching and contraction movement of the telescopic tube 6, simulating the peristalsis and contraction of the intestine. Together with the rubber protrusions, the heavy metal sludge can be prevented from entering the interior of the telescopic tube 6 and accumulating and clogging.

[0055] Please refer to the attached Figure 1 A detachable filter plate 26 is provided at the top of the inner wall of the sedimentation tank 1 to separate and screen out the uppermost suspended clear liquid.

[0056] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An industrial wastewater treatment device with heavy metal recovery function, characterized in that: include: A sedimentation tank (1) is used for heavy metal chemical precipitation in wastewater treatment, wherein a plurality of sleeves (5) are fixedly connected to the bottom side of the sedimentation tank (1), a sedimentation sludge collecting head (4) is slidably connected inside the sleeve (5), the top of the sedimentation sludge collecting head (4) penetrates the bottom side of the inner wall of the sedimentation tank (1), and the plurality of sedimentation sludge collecting heads (4) are controlled by lifting rollers to perform reciprocating lifting and lowering to collect heavy metal sludge that settles down along the slope of the inner wall of the sedimentation tank (1); A heavy metal recovery chamber (2), the heavy metal recovery chamber (2) is located at the bottom side of the sedimentation tank (1), and receives the heavy metal sludge collected by the sedimentation sludge collection head (4) through a plurality of telescopic tubes (6) fixed on the top side, performs secondary filtration through a filter assembly inside the heavy metal recovery chamber (2), precipitates water in the heavy metal sludge, and prevents the heavy metal sludge from causing blockage with the assistance of a cleaning roller; A suction tank (3) is fixedly connected to the right side of the heavy metal recovery chamber (2). A suction pipe 2 (22) is fixedly connected to the front side of the suction tank (3). The suction pipe 2 (22) is connected to the front top opening of the sedimentation tank (1) through a pipeline. The left bottom end of the suction tank (3) is connected to the right side of the heavy metal recovery chamber (2) through a plurality of suction pipes 1 (21). The top side of the suction tank (3) reciprocates through a traction roller to pull a plurality of piston pumps to slowly perform suction work on the heavy metal recovery chamber (2) and the sedimentation tank (1), thereby pumping water into the heavy metal recovery chamber (2). The inside of the collection chamber (2), the rear side of the heavy metal recovery chamber (2) is fixedly connected with a discharge pipe (23), the outer wall of the sedimentation tank (1) is fixedly connected with a branch pipe (24), the inner periphery of the branch pipe (24) is fixedly connected with a plurality of spray nozzles (25), and the spray nozzles (25) penetrate the inner wall of the sedimentation tank (1), the discharge pipe (23) transports water to the branch pipe (24) connected with the plurality of spray nozzles (25) through a connecting pipe, and the spray nozzles (25) spray water to impact the heavy metal sludge accumulated on the inclined surface of the inner wall of the sedimentation tank (1); The traction roller, the cleaning roller and the lifting roller are connected through a belt and three pulleys, and the lifting roller driven by the motor drives the traction roller and the cleaning roller to rotate together.

2. The industrial wastewater treatment device with heavy metal recovery function according to claim 1, characterized in that: The lifting roller comprises a rotating rod (8) fixedly connected to the top side of the heavy metal recovery chamber (2); the outer wall of the rotating rod (8) is fixedly connected to a plurality of abutment wheels (9); the contour of the abutment wheels (9) is elliptical; the adjacent sides of the four adjacent sedimentation sludge collection heads (4) are fixedly connected to an abutment frame (7); the outer wall of the abutment wheel (9) abuts against the bottom side of the abutment frame (7).

3. The industrial wastewater treatment device with heavy metal recovery function according to claim 1, characterized in that: The filter assembly comprises a filter cartridge (10) fixedly connected to the inside of a heavy metal recovery chamber (2), the top opening of the filter cartridge (10) being located at the bottom side of the telescopic tube (6), and the outer wall of the filter cartridge (10) being sleeved with a filter cloth (11).

4. The industrial wastewater treatment device with heavy metal recovery function according to claim 3 is characterized in that: The cleaning roller comprises a rotating rod 2 (12) located inside the filter cartridge (10), the front end of the rotating rod 2 (12) passing through the front side of the heavy metal recovery chamber (2) and being rotatably connected to the heavy metal recovery chamber (2), and a plurality of scraping frames (13) are fixedly connected to both sides of the outer wall of the rotating rod 2 (12), and the scraping frames (13) clean the inner wall of the filter cartridge (10) in cooperation with the cleaning kit to prevent clogging.

5. The industrial wastewater treatment device with heavy metal recovery function according to claim 4, characterized in that: The cleaning kit comprises a scraper head (14) and a brush head (15), the scraper frames (13) on both sides are centrally symmetrical, the scraper head (14) is fixedly connected to one end of the scraper frame (13), and the brush head (15) is fixedly connected to the other end of the scraper frame (13).

6. The industrial wastewater treatment device with heavy metal recovery function according to claim 1, characterized in that: The piston pump comprises a plurality of cylinders (19) fixedly connected to the top side of a suction tank (3), and a piston (20) is slidably connected inside the cylinder (19).

7. The industrial wastewater treatment device with heavy metal recovery function according to claim 6, characterized in that: The traction roller comprises a rotating rod three (16) rotatably connected to the top side of the suction tank (3), the rotating rod three (16) is located at the left end of the top side of the cylinder (19), the top end of the cylinder (19) is rotatably connected to a rotating disk (18), the rotating disk (18) and the gear (17) are connected via two meshing gears (17), and the rotating disk (18) and the top side of the piston (20) are connected via a connecting rod.

8. An industrial wastewater treatment device with heavy metal recovery function according to any one of claims 2, 4 and 7, characterized in that: One of the pulleys is fixedly connected to the front side of rotating rod one (8), another of the pulleys is fixedly connected to the front side of rotating rod two (12), and the remaining pulley is fixedly connected to the front side of rotating rod three (16). The size of the remaining pulley is larger than that of the other two pulleys, and the driving end of the motor is fixedly connected to the rear side of rotating rod one (8).

9. The industrial wastewater treatment device with heavy metal recovery function according to claim 1, characterized in that: The inner wall of the telescopic tube (6) is fixedly connected with a plurality of rubber protrusions so as to transport the heavy metal sludge inside during the process of the telescopic tube (6) performing the stretching and contracting movement.

10. The industrial wastewater treatment device with heavy metal recovery function according to claim 1, characterized in that: A detachable filter plate (26) is provided at the top of the inner wall of the sedimentation tank (1) to separate and screen out the uppermost layer of suspended clear liquid.

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