Heavy metal wastewater purification and recovery equipment

Abstract

The utility model relates to the technical field of wastewater treatment, in particular to heavy metal wastewater purification and recovery equipment which comprises a reaction device and a filtering device which are communicated with each other, the filtering device comprises a filtering box and two filtering nets vertically arranged in the filtering box, a filtering water inlet is formed in the upper portion of one end, close to the reaction device, of the filtering box, a filtering water outlet is formed in the bottom of the other end of the filtering box, the filtering nets are close to the filtering water inlet, and a slag outlet is formed in the bottom of the filtering box and located below the two filtering nets; a baffle moving in the horizontal direction is horizontally arranged at the slag outlet and slidably connected with the bottom plate of the filter box, a scraper is arranged on the side, close to the filter water inlet, of the filter screen, and the filter device further comprises a first driving mechanism driving the scraper to move up and down. The baffle is moved in the direction away from the filtering water inlet, the slag outlet is opened, the first driving mechanism drives the scraping plate to move downwards to clean the filtering net, the filter residues are discharged out of the filtering box through the slag outlet, the filtering net does not need to be manually cleaned, and the filter residues are conveniently recycled.

Description

Technical Field

[0001] The utility model relates to the technical field of wastewater treatment, and more specifically, to a heavy metal wastewater purification and recovery device. Background Art

[0002] Heavy metals, originally defined as metals with a specific gravity greater than 5, include gold, silver, copper, iron, and lead. Heavy metal pollution differs from pollution caused by other organic compounds. While many organic compounds can be reduced or eliminated through natural physical, chemical, or biological purification, heavy metals, on the other hand, accumulate in the environment and are difficult to degrade. Their indiscriminate release can easily cause environmental pollution.

[0003] Existing equipment for treating heavy metals in wastewater uses filter plates that produce a large amount of precipitation during long-term filtration, affecting filtration efficiency and effectiveness, necessitating regular cleaning. Utility model patent No. CN220665026U discloses a heavy metal wastewater purification and recovery device, in which the filter box and first and second filter screens are connected by sliding. To clean the first and second filter screens, simply open the sealing cover and remove the first and second filter screens. The cleaning method used is still manual, which increases labor costs and reduces manual cleaning efficiency. Utility Model Content

[0004] In order to overcome the above-mentioned shortcomings, the present invention aims to provide a technical solution that can solve the above-mentioned problems.

[0005] A heavy metal wastewater purification and recovery device comprises a reaction device and a filtering device that are interconnected; the filtering device comprises a filter box and two filter screens vertically arranged in the filter box, the filter box is provided with a filter water inlet on the upper part of one end close to the reaction device, and a filter water outlet is provided at the bottom of the other end, the filter screen is arranged close to the filter water inlet, and a slag outlet is provided at the bottom of the filter box and below the two filter screens, a baffle that moves in a horizontal direction is horizontally arranged at the slag outlet, the baffle is slidably connected to the bottom plate of the filter box, a scraper is provided on the side of the filter screen close to the filter water inlet, and the filtering device also includes a first driving mechanism that drives the scraper to move up and down.

[0006] Furthermore, the first driving mechanism includes a first hydraulic cylinder, which is fixed to the top plate of the filter box, and an output shaft of the first hydraulic cylinder slides through the top plate and is fixedly connected to the scraper.

[0007] Furthermore, the filtering device also includes a second driving mechanism for driving the baffle to move.

[0008] Furthermore, the second driving mechanism includes a second hydraulic cylinder, a first fixing plate and a second fixing plate are respectively fixed to the bottom surface of one end of the baffle and the bottom plate away from each other, and both ends of the second hydraulic cylinder are respectively fixedly connected to the first fixing plate and the second fixing plate.

[0009] Furthermore, it also includes a filter residue transport conveyor belt mechanism, which is arranged below the slag outlet, and the conveying direction of the filter residue transport conveyor belt mechanism is perpendicular to the flow direction of the sewage in the filter box.

[0010] Furthermore, the bottom surface of the scraper is tilted, and a side of the scraper close to the filter is higher than a side of the scraper away from the filter.

[0011] Furthermore, a connecting pipe is provided between the reaction device and the filtering device, and a mud pump is provided on the connecting pipe.

[0012] Furthermore, the reaction device includes a chemical reaction tank and a sedimentation concentration tank that are interconnected. A reaction water inlet and a dosing port are provided on the top of the chemical reaction tank. A stirring assembly is provided in the chemical reaction tank, and a motor for driving the stirring assembly to rotate is provided on the top of the chemical reaction tank. The sedimentation concentration tank is arranged at the bottom of one side of the chemical reaction tank close to the filter box and is integrated with the chemical reaction tank. The bottom of the sedimentation concentration tank is arranged at an angle and the side close to the chemical reaction tank is higher. The connecting pipe is connected to the bottom of the sedimentation concentration tank.

[0013] Furthermore, the stirring assembly includes a stirring shaft and a stirring blade arranged on the stirring shaft, and the output shaft of the motor rotates through the top of the chemical reaction tank and is connected to the upper end of the stirring shaft.

[0014] Furthermore, the stirring blades include a flat paddle and an inclined paddle, the flat paddle is arranged at the top and bottom of the stirring shaft, and the inclined paddle is arranged at the middle of the stirring shaft.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] The heavy metal wastewater purification and recovery equipment of the utility model has a slag outlet provided at the bottom of the filter box and below the filter screen, a baffle which can move horizontally is provided at the slag outlet, and a scraper is provided on the side of the filter screen close to the filter water inlet. When the filter screen needs to be cleaned, the baffle is moved in the direction away from the filter water inlet, the slag outlet is in an open state, and the scraper is driven downward by the first driving mechanism to clean the filter screen. The filter residue is discharged from the filter box through the slag outlet under the action of the scraper and gravity, so there is no need to manually clean the filter screen, and the filter residue is also convenient for recovery. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0018] Figure 1 It is a schematic diagram of the overall structure of the heavy metal wastewater purification and recovery equipment in the embodiment of the present utility model.

[0019] Figure 2 It is a cross-sectional view of the filter device in the embodiment of the present utility model.

[0020] Figure 3 yes Figure 2 Front view of the filter device in.

[0021] Figure 4 yes Figure 2 Enlarged view of point A in the middle.

[0022] Figure 5 yes Figure 3 Enlarged view of point B in the middle.

[0023] Figure 6 It is a cross-sectional view of the reaction device in the embodiment of the present invention.

[0024] In the figure: 1. Filter box; 101. Bottom plate; 102. Top plate; 2. Filter screen; 3. Filter water inlet; 4. Filter water outlet; 5. Baffle; 6. Scraper; 7. First hydraulic cylinder; 8. Second hydraulic cylinder; 9. First fixed plate; 10. Second fixed plate; 11. Filter residue transport conveyor belt mechanism; 12. Connecting pipe; 13. Mud pump; 14. Chemical reaction tank; 15. Sedimentation concentration tank; 16. Reaction water inlet; 17. Dosing port; 18. Motor; 19. Agitator shaft; 20. Flat paddle; 21. Inclined paddle; 22. Chute; 23. Slider; 24. Sealing strip. DETAILED DESCRIPTION

[0025] 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 embodiments described 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 making creative efforts are within the scope of protection of the present invention.

[0026] like Figure 1 As shown, the heavy metal wastewater purification and recovery equipment in this embodiment includes a reaction device and a filtering device that are interconnected. The heavy metal wastewater is first added with drugs in the reaction device for chemical reaction, and then enters the filtering device for filtration.

[0027] In this embodiment, if Figure 2 and Figure 3 As shown, the filtration device includes a filter box 1 and two filter screens 2 vertically arranged in the filter box 1. The filter box 1 is provided with a filter water inlet 3 on the upper part of one end close to the reaction device, and a filter water outlet 4 on the bottom of the other end. The filter screens 2 are arranged close to the filter water inlet 3, and the pore size of the filter screen 2 closer to the filter water outlet 4 is larger than the pore size of the other filter screen. A slag outlet is provided at the bottom of the filter box 1 and below the two filter screens 2. A baffle 5 that moves in the horizontal direction is horizontally provided at the slag outlet. The baffle 5 is slidably connected to the bottom plate 101 of the filter box 1. A scraper 6 is provided on the side of the filter screen 2 close to the filter water inlet 3. The filtration device also includes a first driving mechanism that drives the scraper 6 to move up and down.

[0028] In the heavy metal wastewater purification and recovery equipment of this embodiment, a slag outlet is provided at the bottom of the filter box 1 and below the filter screen 2, a baffle 5 that can move horizontally is provided at the slag outlet, and a scraper 6 is provided on the side of the filter screen 2 close to the filter water inlet 3. When the filter screen 2 needs to be cleaned, the baffle 5 is moved away from the filter water inlet 3, the slag outlet is in an open state, and the scraper 6 is driven downward by the first driving mechanism to clean the filter screen 2. The filter residue is discharged from the filter box 1 through the slag outlet under the action of the scraper 6 and gravity. There is no need to manually clean the filter screen 2, and it is also convenient to recover the filter residue.

[0029] In this embodiment, the first drive mechanism includes a first hydraulic cylinder 7, which is fixed to the top plate 102 of the filter box 1. The output shaft of the first hydraulic cylinder 7 slides through the top plate 102 and is fixedly connected to the scraper 6. The extension and contraction of the first hydraulic cylinder 7 drives the scraper 6 to rise and fall, thereby cleaning the filter screen 2. Preferably, two first hydraulic cylinders 7 are provided for each scraper 6, and the two first hydraulic cylinders 7 are arranged symmetrically, thereby making the scraper 6 more stable when rising and falling. The bottom surface of the scraper 6 is arranged at an angle, and the side of the scraper 6 closer to the filter screen 2 is higher than the side of the scraper 6 farther from the filter screen 2.

[0030] In this embodiment, the filtering device also includes a second driving mechanism that drives the baffle 5 to move. The second driving mechanism includes a second hydraulic cylinder 8. A first fixing plate 9 and a second fixing plate 10 are respectively fixed to the bottom surface of the end of the baffle 5 that is away from the bottom plate 101. The two ends of the second hydraulic cylinder 8 are respectively fixedly connected to the first fixing plate 9 and the second fixing plate 10. The extension and contraction of the second hydraulic cylinder 8 drives the baffle 5 to move in a direction away from or close to the bottom plate 101, thereby closing or opening the slag outlet. Specifically, in this embodiment, the baffle 5 is located above the bottom plate 101, as shown in FIG. Figure 4As shown, a slide groove 22 is provided on the top surface of the bottom plate 101, and a slider 23 adapted to the slide groove 22 is fixed to one end of the baffle 5 close to the filtered water outlet 4. The slider 23 slides in the slide groove 22 to prevent the baffle 5 from shifting when moving.

[0031] In this embodiment, if Figure 5 As shown, a sealing strip 24 is provided between the bottom surface of the baffle 5, which is close to the filtered water outlet 4, and the top surface of the bottom plate 101. A sealing strip 24 is also provided at the edge of the baffle 5 that contacts the filter box 1, thereby closing the slag outlet. When the filter box 1 is filtering sewage, the baffle 5 is in a sealed connection with the filter box 1 and the bottom plate 101. Support legs are provided on the outer side of the side wall of the filter box 1.

[0032] The heavy metal wastewater purification and recovery equipment in this embodiment includes a filter residue transport conveyor belt mechanism 11, which is arranged below the slag outlet, and the conveying direction of the filter residue transport conveyor belt mechanism 11 is perpendicular to the flow direction of the sewage in the filter box 1, so that the filter residue scraped off by the scraper 6 falls onto the conveyor belt of the conveyor belt mechanism, which is convenient for recovering the filter residue.

[0033] In this embodiment, a connecting pipe 12 is provided between the reaction device and the filtering device, and a mud pump 13 is provided on the connecting pipe 12. Figure 6 As shown, the reaction device includes a chemical reaction tank 14 and a sedimentation and concentration tank 15, which are interconnected. Support legs are provided at the bottom of the chemical reaction tank 14 and the sedimentation and concentration tank 15. A reaction water inlet 16 and a dosing port 17 are provided at the top of the chemical reaction tank 14. A stirring assembly is provided within the chemical reaction tank 14, and a motor 18 is provided at the top of the chemical reaction tank 14 to drive the stirring assembly. The sedimentation and concentration tank 15 is arranged at the bottom of the chemical reaction tank 14 on the side close to the filter box 1 and is integrally arranged with the chemical reaction tank 14. The bottom of the sedimentation and concentration tank 15 is inclined, with the side close to the chemical reaction tank 14 being higher, thereby facilitating the precipitation and accumulation of flocculants in the wastewater after the chemical reaction. One end of the connecting pipe 12 is connected to the bottom of the sedimentation and concentration tank 15, and the other end is connected to the filter water inlet 3 of the filter box 1.

[0034] Preferably, the stirring assembly includes a stirring shaft 19 and stirring blades mounted on the stirring shaft 19. The output shaft of the motor 18 rotates, passes through the top of the chemical reaction tank 14, and is connected to the upper end of the stirring shaft 19. The stirring blades include a flat paddle 20 and an inclined paddle 21. The flat paddle 20 is mounted at the top and bottom of the stirring shaft 19, while the inclined paddle 21 is mounted in the middle of the stirring shaft 19. When the stirring shaft 19 rotates, the flat paddle 20 stirs the sewage at the corresponding height, while the inclined paddle 21 tilts the sewage in the middle upward, initially concentrating flocs in the upper middle portion. As the flocs accumulate, they settle to the bottom of the chemical reaction tank 14. As the flat paddle 20 at the bottom rotates, the centrifugal force causes the flocs to accumulate in the sedimentation and concentration tank 15.

[0035] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A heavy metal wastewater purification and recovery equipment, characterized in that: The invention comprises a reaction device and a filtering device which are interconnected; the filtering device comprises a filtering box (1) and two filtering screens (2) vertically arranged in the filtering box (1); a filtering water inlet (3) is arranged at the upper part of one end of the filtering box (1) close to the reaction device, and a filtering water outlet (4) is arranged at the bottom of the other end; the filtering screens (2) are arranged close to the filtering water inlet (3); a slag outlet is provided at the bottom of the filtering box (1) and below the two filtering screens (2); a baffle (5) which moves in a horizontal direction is horizontally arranged at the slag outlet, the baffle (5) is slidably connected to the bottom plate (101) of the filtering box (1); a scraper (6) is provided on one side of the filtering screen (2) close to the filtering water inlet (3); and the filtering device further comprises a first driving mechanism for driving the scraper (6) to move up and down.

2. The heavy metal wastewater purification and recovery equipment according to claim 1, characterized in that: The first driving mechanism comprises a first hydraulic cylinder (7), the first hydraulic cylinder (7) being fixed on a top plate (102) of the filter box (1), and an output shaft of the first hydraulic cylinder (7) slidingly passing through the top plate (102) and being fixedly connected to the scraper (6).

3. The heavy metal wastewater purification and recovery equipment according to claim 2, characterized in that: The filtering device further comprises a second driving mechanism for driving the baffle (5) to move.

4. The heavy metal wastewater purification and recovery equipment according to claim 3, characterized in that: The second driving mechanism comprises a second hydraulic cylinder (8); a first fixing plate (9) and a second fixing plate (10) are respectively fixed to the bottom surface of one end of the baffle (5) and the bottom plate (101) away from each other; and both ends of the second hydraulic cylinder (8) are respectively fixedly connected to the first fixing plate (9) and the second fixing plate (10).

5. The heavy metal wastewater purification and recovery equipment according to claim 4, characterized in that: It also includes a filter residue transport conveyor belt mechanism (11), which is arranged below the slag outlet, and the transport direction of the filter residue transport conveyor belt mechanism (11) is perpendicular to the flow direction of the sewage in the filter box (1).

6. The heavy metal wastewater purification and recovery equipment according to claim 1, characterized in that: The bottom surface of the scraper (6) is arranged at an angle, and the side of the scraper (6) close to the filter screen (2) is higher than the side of the scraper (6) away from the filter screen (2).

7. The heavy metal wastewater purification and recovery equipment according to claim 1, characterized in that: A connecting pipe (12) is provided between the reaction device and the filtering device, and a mud pump (13) is provided on the connecting pipe (12).

8. The heavy metal wastewater purification and recovery equipment according to claim 7, characterized in that: The reaction device comprises a chemical reaction tank (14) and a sedimentation concentration tank (15) which are interconnected. A reaction water inlet (16) and a dosing port (17) are provided on the top of the chemical reaction tank (14). A stirring assembly is provided in the chemical reaction tank (14), and a motor (18) for driving the stirring assembly to rotate is provided on the top of the chemical reaction tank (14). The sedimentation concentration tank (15) is arranged at the bottom of one side of the chemical reaction tank (14) close to the filter box (1) and is integrally arranged with the chemical reaction tank (14). The bottom of the sedimentation concentration tank (15) is arranged obliquely and the side close to the chemical reaction tank (14) is higher. The connecting pipe (12) is connected to the bottom of the sedimentation concentration tank (15).

9. The heavy metal wastewater purification and recovery equipment according to claim 8, characterized in that: The stirring assembly includes a stirring shaft (19) and a stirring blade arranged on the stirring shaft (19); the output shaft of the motor (18) rotates through the top of the chemical reaction tank (14) and is connected to the upper end of the stirring shaft (19).

10. The heavy metal wastewater purification and recovery equipment according to claim 9, characterized in that: The stirring blade includes a flat paddle (20) and an inclined paddle (21), wherein the flat paddle (20) is arranged at the upper part and the bottom part of the stirring shaft (19), and the inclined paddle (21) is arranged at the middle part of the stirring shaft (19).

Images