A heavy metal sewage treatment device

Abstract

The present invention discloses a heavy metal sewage treatment device, belonging to the field of sewage treatment devices, which includes a sedimentation tank. There are several purification tanks arranged outside the sedimentation tank. An inlet pipe, a feed pipe and a slag discharge pipe are arranged on the sedimentation tank. The side wall of the sedimentation tank is equally divided into several parts, including adjacent and equal-numbered solid side walls and filter screen side walls. A number of movable covers equal to the number of filter screen side walls are movably arranged outside the side wall of the sedimentation tank. The movable cover can move between the solid side wall and the filter screen side wall. A stirring rod is arranged inside the sedimentation tank, and a scraper is fixedly arranged at the bottom end of the stirring rod; the purification tank is divided into a filtration area and a disinfection area by a partition board. Filter nets are arranged on the top of the filtration area and on the partition board, and sterilizing lamps are arranged inside the disinfection area. First, sedimentation is carried out, and then filtration and sterilization are carried out, so that the wastewater treatment is more thorough. Moreover, one sedimentation tank can be adapted to several purification tanks, making the wastewater treatment more efficient. The scraper can accelerate the cleaning and discharge of sediment during rotation.

Description

Technical Field

[0001] The present invention relates to the field of sewage treatment equipment, and particularly to a heavy metal sewage treatment equipment. Background Art

[0002] In the production processes of industries such as electroplating, metallurgy, chemical engineering, and mining, a large amount of wastewater containing heavy metal ions is generated. If it is directly discharged into the environment without treatment, it will cause serious harm to the ecological environment and human health. Heavy metal sewage contains heavy metal elements such as cadmium, lead, mercury, and zinc. These elements are highly toxic to the environment and human health. Therefore, the treatment and discharge standards of heavy metal sewage have always been the focus of environmental protection.

[0003] In order to specifically treat wastewater containing heavy metal ions, heavy metal sewage treatment equipment is usually required. The chemical precipitation method is one of the most traditional methods for treating wastewater containing heavy metal ions. By adding chemical reagents, heavy metal ions are formed into insoluble precipitates, which are then separated from the wastewater.

[0004] Generally, after adding chemical reagents, a stirring rod is used to stir and mix the chemical reagents and sewage to accelerate the precipitation. The sewage after separating the precipitate is further treated deeply, including deep treatment methods such as filtration and disinfection and sterilization, to ensure that the water quality meets the discharge standards or utilization requirements.

[0005] On the one hand, the stirring rod accelerates the precipitation rate. On the other hand, the filtration speed of the filter screen for deep treatment is slow. Often, one deep treatment filtration tank cannot meet the precipitation speed of the precipitation tank for sewage, which will affect the overall sewage treatment efficiency, and it is impossible to fully mix the chemical reagents and wastewater before separating the precipitate from the wastewater.

[0006] For the traditional separation of the precipitate from the wastewater, most use the bottom filter screen to isolate the precipitate on the filter screen, and only allow the wastewater to pass through. However, this will cause the heavy metal ion precipitate generated in the precipitation tank to accumulate on the filter screen, and it is impossible to clean the precipitate in time, affecting the overall treatment efficiency. Summary of the Invention

[0007] In order to solve the above technical problems that often one deep treatment filtration tank cannot meet the precipitation speed of the precipitation tank for sewage, which will affect the overall sewage treatment efficiency, and it is impossible to fully mix the chemical reagents and wastewater before separating the precipitate from the wastewater, and the heavy metal ion precipitate generated in the precipitation tank accumulates on the filter screen, and it is impossible to clean the precipitate in time, affecting the overall treatment efficiency, the present invention provides a heavy metal sewage treatment equipment.

[0008] A heavy metal sewage treatment device includes a sedimentation tank, and several purification tanks are arranged outside the sedimentation tank. An inlet pipe, a feed pipe and a slag discharge pipe are arranged on the sedimentation tank. The side wall of the sedimentation tank is equally divided into several parts, including adjacent and equal-numbered solid side walls and filter screen side walls. Several movable covers with the same number as the filter screen side walls are movably arranged on the outer side of the side wall of the sedimentation tank. The movable covers can move between the solid side walls and the filter screen side walls. A stirring rod is arranged inside the sedimentation tank, and a scraping plate is fixedly arranged at the bottom end of the stirring rod; the purification tank is divided into a filtration area and a disinfection area by a partition board. Filter nets are arranged on the top of the filtration area and on the partition board, and sterilization lamps are arranged inside the disinfection area.

[0009] Furthermore, the sedimentation tank is of a cylindrical structure as a whole, and its bottom is a conical bottom. The slag discharge pipe is fixedly arranged at the conical bottom, and an electromagnetic valve is arranged inside it. A slag collection tank is arranged below the sedimentation tank, and the bottom end of the slag discharge pipe is communicated with the slag collection tank. The inlet pipe and the feed pipe both penetrate through the top wall of the sedimentation tank and can be used to connect to a sewage pool and add a precipitant respectively.

[0010] Furthermore, the number of equal divisions of the side wall of the sedimentation tank is an even number, and a circle of limit blocks is fixedly arranged at the bottom end of the side wall of the sedimentation tank. A plurality of sliding grooves are correspondingly arranged on the top wall of the limit block and the top end of the side wall of the sedimentation tank. The number of the plurality of sliding grooves is the same as the number of the movable covers. Sliding blocks are fixedly arranged on the bottom wall and the inner wall of the movable cover, and the sliding blocks can move along the sliding grooves.

[0011] Furthermore, a rotating motor is arranged on the top wall of the sedimentation tank through a motor base. A support frame is arranged above the rotating motor. A servo motor is arranged on the top wall of the support frame through a motor base. L-shaped rods are fixedly arranged on the top walls of several movable covers, and the several L-shaped rods are fixedly connected to each other, and the fixed connection part is arranged at the output end of the servo motor, which can drive the several movable covers to rotate synchronously.

[0012] Furthermore, the stirring rod includes a rotating shaft arranged at the output end of the rotating motor. Stirring paddles are fixedly arranged on the outer wall of the rotating shaft. A fixing rod is arranged between the inner walls of the solid side walls, and a limiting ring is fixedly arranged at the center of the fixing rod. The rotating shaft penetrates through the center of the limiting ring and is rotatably connected.

[0013] Furthermore, the scraping plates are symmetrically and fixedly arranged at the bottom end of the rotating shaft and include a horizontal plate and a vertical plate. The horizontal plate and the vertical plate are respectively adapted to the conical bottom wall and the cylindrical side wall of the sedimentation tank, and soft brushes are fixedly arranged on their opposite faces.

[0014] Furthermore, the number of purification tanks is the same as the number of filter screen side walls, and the filtration area therein is located below the corresponding filter screen side walls and can catch the water filtered by the filter screen side walls. The filtration area is a top-opening structure, and the filter net detachably arranged at the top end of the filtration area is an ion exchange resin net.

[0015] Furthermore, the filter screen detachably arranged on the partition board is an activated carbon adsorption layer, the sterilization lamp is an ultraviolet sterilization lamp, which is fixedly arranged in a row on the top wall of the disinfection area, and a drain pipe is arranged through the bottom end of the side wall of the disinfection area.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: First, use the movable cover to cover the side wall of the filter screen, let the stirring rod fully mix the wastewater and chemical reagents, then precipitate and separate out. Move the movable cover to the solid side wall to expose the side wall of the filter screen, so that the precipitate is isolated in the precipitation tank and discharged along the slag discharge pipe. The wastewater then falls into the purification tank after being filtered through the side wall of the filter screen, and is successively filtered through the ion exchange resin mesh and the activated carbon adsorption layer, sterilized by the ultraviolet sterilization lamp, and then discharged to the outside, making the wastewater treatment more thorough. Moreover, one precipitation tank can be adapted to several purification tanks, making the wastewater treatment more efficient. During the rotation process, the scraper can accelerate the cleaning and discharge of the precipitate. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a front view sectional view of the structure of the present invention;

[0018] Figure 2 It is a side view of the precipitation tank 1 of the present invention;

[0019] Figure 3 It is a top view of the structure of the present invention;

[0020] Figure 4 It is a top view sectional view of the precipitation tank 1 of the present invention;

[0021] Figure 5 It is a schematic view of part of the structure A of the present invention;

[0022] Figure 6 It is a schematic view of part of the structure B of the present invention.

[0023] Figure 7 It is a schematic view of part of the structure C of the present invention.

[0024] Figure 8 It is a schematic view of part of the structure D of the present invention.

[0025] Figure 9 It is a schematic view of part of the structure E of the present invention.

[0026] Figure 10 It is a schematic view of part of the structure F of the present invention.

[0027] In the figure: 1. sedimentation tank; 2. purification tank; 3. solid side wall; 4. filter screen side wall; 5. movable cover; 6. stirring rod; 7. scraper; 8. water inlet pipe; 9. feed pipe; 10. slag discharge pipe; 11. partition board; 12. filtration area; 13. disinfection area; 14. filter screen; 15. germicidal lamp; 16. solenoid valve; 17. slag collection tank; 18. limit block; 19. sliding groove; 20. slider; 21. rotating motor; 22. servo motor; 23. L-shaped rod; 24. rotating shaft; 25. stirring paddle; 26. fixed rod; 27. limit ring; 28. cross plate; 29. vertical plate; 30. soft brush; 31. drain pipe. Detailed implementation manner

[0028] In order to enable those skilled in the art to better understand the solution of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0029] It should be noted that the terms "first", "second", etc. in the description and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and do not necessarily need to be used to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances, so as to implement the embodiments of the present invention described here. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0030] In the present invention, the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", etc. is based on the orientation or positional relationship shown in the drawings. These terms are mainly used to better describe the present invention and its embodiments, and are not used to limit that the indicated devices, elements or components must have a specific orientation, or be constructed and operated in a specific orientation.

[0031] Moreover, in addition to being used to indicate orientation or positional relationship, some of the above terms may also be used to indicate other meanings. For example, the term "upper" may also be used to indicate a certain attachment relationship or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in the present invention can be understood according to the specific circumstances. In addition, the meaning of the term "plurality" should be two or more.

[0032] It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other. The following will refer to the accompanying drawings Figures 1 - 10 and describe the present invention in detail in conjunction with the embodiments.

[0033] A heavy metal sewage treatment device includes a sedimentation tank 1. There are several purification tanks 2 arranged outside the sedimentation tank 1. One sedimentation tank 1 can be adapted to several purification tanks 2 to accelerate the efficiency of wastewater sedimentation and purification. An inlet pipe 8, a feed pipe 9 and a slag discharge pipe 10 are arranged on the sedimentation tank 1. The sedimentation tank 1 is integrally in a cylindrical structure, and its bottom is a conical bottom. The slag discharge pipe 10 is fixedly arranged at the conical bottom to facilitate the discharge of heavy metal precipitates. An electromagnetic valve 16 is arranged inside the slag discharge pipe 10. By opening and closing the electromagnetic valve 16, the precipitates can be conveniently discharged or the sedimentation tank 1 can be closed.

[0034] A slag collection tank 17 is arranged below the sedimentation tank 1. The bottom end of the slag discharge pipe 10 is communicated with the slag collection tank 17. The precipitates can be discharged from the slag discharge pipe 10 and enter the inside of the slag collection tank 17 for unified collection, which is convenient for subsequent unified treatment. The inlet pipe 8 and the feed pipe 9 both penetrate through the top wall of the sedimentation tank 1, and can respectively connect the sedimentation tank 1 to a sewage pool and add a chemical precipitant into it.

[0035] The side wall of the sedimentation tank 1 is equally divided into several parts. The number of equal divisions of the side wall of the sedimentation tank 1 is an even number, including adjacent and equal-numbered solid side walls 3 and filter screen side walls 4. The solid side walls 3 and the filter screen side walls 4 are adjacent to each other, which is convenient for the movable cover 5 to move between the solid side walls 3 and the filter screen side walls 4.

[0036] Several movable covers 5 with the same number as the filter screen side walls 4 are movably arranged outside the side wall of the sedimentation tank 1. One movable cover 5 and a group of adjacent solid side walls 3 and filter screen side walls 4 form a group and are paired with one purification tank 2. One movable cover 5 can move between the solid side walls 3 and the filter screen side walls 4. A circle of limit blocks 18 is fixedly arranged at the bottom end of the side wall of the sedimentation tank 1. A plurality of sliding grooves 19 are correspondingly arranged on the top wall of the limit block 18 and the top end of the side wall of the sedimentation tank 1. The number of the plurality of sliding grooves 19 is the same as the number of the movable covers 5. Sliders 20 are fixedly arranged on the bottom wall and the inner wall of the movable cover 5, and the sliders 20 can move along the sliding grooves 19.

[0037] A rotary motor 21 is provided on the top wall of the precipitation tank 1 through a motor base. A support frame is provided above the rotary motor 21. A servo motor 22 is provided on the top wall of the support frame through a motor base. L-shaped rods 23 are fixedly provided on the top walls of a number of movable covers 5. The L-shaped rods 23 are fixedly connected to each other, and the fixed connection is provided at the output end of the servo motor 22, which can drive the number of movable covers 5 to rotate synchronously.

[0038] Determine the rotation angle of the servo motor 22 according to the number of solid side walls 3 and filter screen side walls 4. For example, in the Figure 3 embodiment shown in the figure, there are two solid side walls 3 and two filter screen side walls 4 each, so the paired purification tanks 2 are also two. Start the servo motor 22 to rotate 90 degrees, drive the L-shaped rod 23 to rotate 90 degrees, and then the slider 20 in the movable cover 5 can rotate 90 degrees along the chute 19. When the slider 20 slides to the leftmost side of the chute 19, the movable cover 5 slides to the outside of the solid side wall 3, exposing the filter screen side wall 4, and the wastewater can flow out through the filtration of the filter screen side wall 4. When the slider 20 slides to the rightmost side of the chute 19, the movable cover 5 slides to the outside of the filter screen side wall 4, blocking the filter screen side wall 4, which is convenient for the wastewater and chemical reagents to be fully stirred and mixed inside the precipitation tank 1. After being stirred and mixed evenly and the precipitate is separated out, then move the movable cover 5 away.

[0039] A stirring rod 6 is arranged inside the precipitation tank 1. The stirring rod 6 includes a rotating shaft 24 arranged at the output end of the rotary motor 21. Stirring paddles 25 are fixedly arranged on the outer wall of the rotating shaft 24. A fixing rod 26 is arranged between the inner walls of the solid side walls 3. A limiting ring 27 is fixedly arranged at the center of the fixing rod 26. The rotating shaft 24 passes through the center of the limiting ring 27 and is rotatably connected. The limiting ring 27 can play a role in limiting the rotation of the rotating shaft 24 and increase the stability.

[0040] Start the rotary motor 21 to drive the rotating shaft 24 to rotate, and then drive the stirring paddles 25 to fully stir and mix the wastewater and chemical reagents, so as to accelerate the precipitation of heavy metals.

[0041] A scraper 7 is fixedly arranged at the bottom end of the stirring rod 6. The scraper 7 is symmetrically and fixedly arranged at the bottom end of the rotating shaft 24 and includes a horizontal plate 28 and a vertical plate 29. The horizontal plate 28 and the vertical plate 29 are respectively adapted to the conical bottom wall and the cylindrical side wall of the precipitation tank 1, and soft brushes 30 are fixedly arranged on the opposite surfaces of the horizontal plate 28 and the vertical plate 29 and the conical bottom wall and the cylindrical side wall of the precipitation tank 1.

[0042] When the rotating shaft 24 rotates, it can drive the scraper 7 to rotate simultaneously. Since the soft brush 30 on the top wall of the cross plate 28 is in contact with and rubs against the conical bottom wall of the sedimentation tank 1, the soft brush 30 can rotate and clean the conical bottom wall of the sedimentation tank 1. The soft brush 30 on the side wall of the vertical plate 29 is in contact with and rubs against the cylindrical side wall of the sedimentation tank 1, and the soft brush 30 can rotate and clean the cylindrical side wall of the sedimentation tank 1, preventing heavy metal precipitates from adhering to the bottom wall and the side wall, and accelerating the speed of the heavy metal precipitates being discharged from the slag discharge pipe 10.

[0043] The purification tank 2 is divided into a filtration area 12 and a disinfection area 13 by a partition 11. The number of purification tanks 2 is the same as the number of filter screen side walls 4, and the filtration area 12 therein is located below the corresponding filter screen side walls 4 to catch the water filtered by the filter screen side walls 4. Filter meshes 14 are provided on the top of the filtration area 12 and on the partition 11. The filtration area 12 has an open-top structure, and the filter mesh 14 detachably provided at the top of the filtration area 12 is an ion exchange resin mesh.

[0044] After the stirring rod 6 mixes the chemical reagent and the wastewater evenly and precipitates, rotate the movable cover 5 so that it slides to the outside of the solid side wall 3, exposing the filter screen side wall 4. The wastewater can filter out from the filter screen side wall 4 and fall into the open top of the filtration area 12 in the purification tank 2 below. After passing through the ion exchange of the ion exchange resin mesh, the remaining heavy metals in the wastewater are further separated again. Then the wastewater after the second separation passes through the activated carbon adsorption layer on the partition 11 and flows into the disinfection area 13, where other impurities in the wastewater can be adsorbed and separated.

[0045] A germicidal lamp 15 is provided inside the disinfection area 13. The filter mesh 14 detachably provided on the partition 11 is an activated carbon adsorption layer. The germicidal lamp 15 is an ultraviolet germicidal lamp, fixedly arranged on the top wall of the disinfection area 13, and a drain pipe 31 is provided through the bottom end of the side wall of the disinfection area 13.

[0046] After being sterilized by the irradiation of the germicidal lamp 15, the purified water can be discharged to the outside through the drain pipe 31. After the whole process, the heavy metal separation of the wastewater can be more thorough, and at the same time, other impurities are cleaned, and the sterilization treatment is carried out, making the separated water quality meet the discharge standards.

[0047] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A heavy metal sewage treatment device, comprising a sedimentation tank (1), with several purification tanks (2) arranged outside the sedimentation tank (1), and a water inlet pipe (8), a feed pipe (9) and a slag discharge pipe (10) arranged on the sedimentation tank (1), characterized in that: The side wall of the sedimentation tank (1) is equally divided into several parts, including adjacent and equal-numbered solid side walls (3) and filter screen side walls (4). On the outer side of the side wall of the sedimentation tank (1), several movable covers (5) with the same number as the filter screen side walls (4) are movably arranged. The movable cover (5) can move between the solid side wall (3) and the filter screen side wall (4). Inside the sedimentation tank (1), there is a stirring rod (6), and a scraper (7) is fixedly arranged at the bottom end of the stirring rod (6). The purification tank (2) is divided into a filtration area (12) and a disinfection area (13) by a partition plate (11). Filter meshes (14) are arranged on the top of the filtration area (12) and the partition plate (11). Inside the disinfection area (13), there is a germicidal lamp (15). The number of equal divisions of the side wall of the sedimentation tank (1) is an even number, and a ring of limit blocks (18) is fixedly arranged at the bottom end of the side wall of the sedimentation tank (1). A number of sliding grooves (19) are correspondingly arranged on the top wall of the limit block (18) and the top end of the side wall of the sedimentation tank (1). The number of the several sliding grooves (19) is the same as the number of the movable covers (5). Sliders (20) are fixedly arranged on the bottom wall and the inner wall of the movable cover (5), and the sliders (20) can move along the sliding grooves (19). The scraper (7) is symmetrically and fixedly arranged at the bottom end of the rotating shaft (24), including a horizontal plate (28) and a vertical plate (29). The horizontal plate (28) and the vertical plate (29) are respectively adapted to the conical bottom wall and the cylindrical side wall of the sedimentation tank (1), and soft brushes (30) are fixedly arranged on their opposite faces. The number of purification tanks (2) is the same as the number of filter screen side walls (4), and the filtration area (12) therein is located below the corresponding filter screen side wall (4) to catch the water filtered by the filter screen side wall (4). The filtration area (12) is a top-open structure, and the filter mesh (14) detachably arranged at the top end of the filtration area (12) is an ion exchange resin mesh.

2. The heavy metal sewage treatment equipment according to claim 1, characterized in that: The sedimentation tank (1) is of a cylindrical structure as a whole, and its bottom is a conical bottom. A slag discharge pipe (10) is fixedly arranged at the conical bottom, and a solenoid valve (16) is arranged inside it. A slag collection tank (17) is arranged below the sedimentation tank (1). The bottom end of the slag discharge pipe (10) is communicated with the slag collection tank (17). The water inlet pipe (8) and the feed pipe (9) both penetrate through the top wall of the sedimentation tank (1) and are respectively used to connect to the sewage tank and add a precipitant.

3. A heavy metal sewage treatment device according to claim 2, characterized in that: A rotating motor (21) is arranged on the top wall of the sedimentation tank (1) through a motor base. A support frame is arranged above the rotating motor (21). A servo motor (22) is arranged on the top wall of the support frame through a motor base. L-shaped rods (23) are fixedly arranged on the top walls of several movable covers (5). The several L-shaped rods (23) are fixedly connected to each other, and the fixed connection is arranged at the output end of the servo motor (22) to drive the several movable covers (5) to rotate synchronously.

4. A heavy metal sewage treatment device according to claim 3, characterized in that: The stirring rod (6) includes a rotating shaft (24) arranged at the output end of the rotating motor (21). Stirring paddles (25) are fixedly arranged on the outer wall of the rotating shaft (24). A fixed rod (26) is arranged between the inner walls of the solid side walls (3). A limit ring (27) is fixedly arranged at the center of the fixed rod (26). The rotating shaft (24) passes through the center of the limit ring (27) and is rotatably connected.

5. A heavy metal sewage treatment device according to claim 4, characterized in that: The filter screen (14) detachably arranged on the partition board (11) is an activated carbon adsorption layer, and the germicidal lamp (15) is an ultraviolet germicidal lamp, fixedly arranged in a row on the top wall of the disinfection area (13). A drain pipe (31) is arranged through the bottom end of the side wall of the disinfection area (13).

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