Efficient treatment device for industrial wastewater containing heavy metals

Abstract

The utility model discloses an efficient treatment device for industrial wastewater containing heavy metals, and relates to the technical field of wastewater treatment.The efficient treatment device comprises a chelating tank, a water inlet pipe is arranged on the upper portion of the chelating tank, a water outlet pipe is arranged at the bottom of the chelating tank, and a thin-wall inner container is arranged on the inner side of the chelating tank and comprises a peripheral wall and a groove-shaped bottom wall; the outer peripheral surface of the peripheral wall is attached to the inner peripheral surface of the chelating tank, and the peripheral wall is detachably connected with the groove-shaped bottom wall in a sealed mode; a water outlet avoiding opening used for being communicated with the water outlet pipe is formed in the groove-shaped bottom wall, a sealing sleeve is inserted into the end, close to the chelating tank, of the water outlet pipe, a water retaining flange is arranged at one end of the sealing sleeve, and the water retaining flange abuts against the groove-shaped bottom wall. When stubborn and difficult-to-remove attachments are formed on the inner side of the chelating tank after long-term use, the thin-wall inner container can be taken out for cleaning, and the peripheral wall of the thin-wall inner container is detached from the groove-shaped bottom wall, so that the chelating tank is convenient to clean.

Description

Technical Field

[0001] The present application relates to the field of wastewater treatment technology, and in particular to a highly efficient treatment device for industrial wastewater containing heavy metals. Background Art

[0002] Heavy metal wastewater mainly comes from electroplating, chemical, PCB, metallurgical and other enterprises. It contains metal ions such as copper, nickel, lead, and thiourea and their complexes. It is difficult to treat and highly toxic. The main treatment methods are: ion exchange, electrodialysis, chemical precipitation, etc.

[0003] In industry, chelating flocculants are mainly used to adsorb heavy metal ions. The chelating group of the chelating flocculant can react with a variety of heavy metal ions to form stable chelates. The flocculated precipitates are then separated using solid-liquid separation equipment to achieve the recovery and deep removal of metal ions.

[0004] Since the flocculated sediment will adhere to and settle on the inner wall of the container, the container needs to be cleaned regularly. After the container has been used for a long time, the flocculated sediment will adhere stubbornly, making it difficult and time-consuming to clean, which can easily affect the treatment of industrial wastewater. Utility Model Content

[0005] In order to make it easier to clean the flocculated sediments attached to the inner wall of the container during the treatment of heavy metal wastewater, the present application provides a high-efficiency treatment device for heavy metal-containing industrial wastewater.

[0006] The present application provides a high-efficiency treatment device for heavy metal-containing industrial wastewater using the following technical solution:

[0007] A high-efficiency treatment device for industrial wastewater containing heavy metals comprises a chelating tank, wherein a water inlet pipe is arranged on the upper part of the chelating tank, a water outlet pipe is arranged on the bottom of the chelating tank, a thin-walled liner is arranged on the inner side of the chelating tank, and the thin-walled liner comprises a peripheral wall and a groove-shaped bottom wall, the outer peripheral surface of the peripheral wall is in contact with the inner peripheral surface of the chelating tank, and a detachable sealed connection is formed between the peripheral wall and the groove-shaped bottom wall; the groove-shaped bottom wall is provided with a water outlet avoidance port for connecting with the water outlet pipe, a sealing sleeve is inserted at one end of the water outlet pipe close to the chelating tank, a water retaining flange is arranged at one end of the sealing sleeve, and the water retaining flange is pressed against the groove-shaped bottom wall.

[0008] By adopting the above technical scheme, the sewage containing heavy metals is discharged into the chelating tank through the water inlet pipe for flocculation and chelation reaction, and then transported to the solid-liquid separation equipment through the water outlet pipe for solid-liquid separation. After the wastewater enters the chelating tank, it is stored in the thin-walled liner, and the peripheral wall of the thin-walled liner is supported by the inner peripheral surface of the chelating tank; the sealing sleeve is plugged into the water outlet pipe, and the water retaining flange shields the matching gap between the water outlet avoidance port and the sealing sleeve. The wastewater in the thin-walled liner can press the water retaining flange against the groove-shaped bottom wall, reducing the wastewater from seeping through the water outlet avoidance port to the chelating tank and the thin-walled liner. When stubborn and difficult-to-remove attachments are formed on the inner side of the chelating tank after long-term use, the thin-walled liner can be taken out of the chelating tank, and then the peripheral wall of the thin-walled liner and the groove-shaped bottom wall can be disassembled, so that the thin-walled liner is easier to clean. In addition, the thin-walled liner uses less material, and the thin-walled liner can be directly discarded and replaced with a new one when necessary. Moreover, the thin-walled liner can be directly replaced. When the old thin-walled liner is cleaned, a new thin-walled liner is placed in the chelating tank, so that the wastewater treatment can be restored as soon as possible, which is beneficial to ensuring the efficiency of the wastewater treatment and is more efficient than conventional wastewater treatment devices.

[0009] Optionally, the thin-walled inner liner is flexible, the peripheral wall is a cylindrical structure joined at both ends, a longitudinal sealing layer is provided at the joint of the peripheral wall, and a circumferential sealing layer is provided at the joint between the peripheral wall and the groove-shaped bottom wall.

[0010] By adopting the above technical solution, each joint of the thin-walled inner liner is bonded with a sealant to form a sealant layer. When the sealant layer is torn off, the peripheral wall and the groove-shaped bottom wall can be disassembled and separated, making the thin-walled inner liner easier to clean. The peripheral wall is set as a cylindrical structure with two ends connected, so that the peripheral wall can be unfolded and cleaned, thereby further reducing the difficulty of cleaning the peripheral wall.

[0011] Optionally, a clamping piece is provided on the top of the chelating tank, and the clamping piece includes an inner hoop ring and a limiting flange located at one end of the inner hoop ring, the inner hoop ring is provided with a deformation slit, and the deformation slit is along the axial direction of the inner hoop ring, and the inner hoop ring and the chelating tank clamp the surrounding wall with an interference fit clamping force; the limiting flange abuts the upper edge of the chelating tank.

[0012] By adopting the above technical solution, the inner hoop of the clamping member can press the peripheral wall of the thin-walled liner against the inner wall of the chelating tank, so that the upper end of the thin-walled liner is positioned and the deformation of the thin-walled liner caused by the flow of wastewater is reduced.

[0013] Optionally, the flange blind plate is fixedly provided with a filling plunger, and the filling plunger is located on the inner side of the three-way joint and occupies the inner cavity of the three-way joint close to the end of the flange blind plate.

[0014] By adopting the above technical solution, the filling plunger occupies the inner cavity of the end of the tee joint close to the flange blind plate, so that the sediment in the outlet pipe cannot block the inner cavity of the end of the tee joint close to the flange blind plate, making the inner space of the tee joint easier to clean and helping to reduce leakage at the connection between the flange blind plate and the fixed flange.

[0015] Optionally, the water outlet pipe includes a pipe body and multiple three-way joints, and the water outlet pipe has multiple bending parts; the three-way joint is located at the bending part of the water outlet pipe, and the three-way joint is connected to the pipe body of the water outlet pipe through two mutually perpendicular ports, and the other port of the three-way joint is detachably connected with a seal.

[0016] By adopting the above technical solution, the water outlet pipe realizes the bending and reversing of the pipeline path through the three-way joint, and the port of the three-way joint that is not connected to the pipe body is sealed with a seal. When the water outlet pipe is blocked, the seal can be removed and then the blockage can be cleared out with tools to facilitate the treatment of the blockage problem of the water outlet pipe.

[0017] Optionally, a fixed flange is provided at the port of the tee joint corresponding to the sealing member, the sealing member comprises a flange blind plate and a sealing gasket, the fixed flange is connected to the flange blind plate via a threaded fastener, and the sealing gasket is located between the fixed flange and the flange blind plate.

[0018] By adopting the above technical scheme, the port of the three-way joint is sealed by using a fixed flange, a flange blind plate, a sealing gasket and a threaded fastener. When the threaded fastener is stripped, the threaded fastener can be replaced in time. When the sealing gasket is aged and leaking, the sealing gasket can be replaced in time, making the maintenance of the seal more convenient.

[0019] Optionally, a support ring is provided at the bottom of the thin-walled liner, the support ring circumferentially blocks the joint between the peripheral wall and the grooved bottom wall, and the support ring is provided with a longitudinal cutting seam.

[0020] By adopting the above technical solution, the support ring can cover the joint between the peripheral wall and the groove-shaped bottom wall, which is conducive to reducing the scouring and penetration of wastewater on the connection between the peripheral wall and the groove-shaped bottom wall. By arranging a longitudinal cut seam on the support ring, the support ring can be stretched and deformed in the radial direction to fit the thin-walled liner as much as possible.

[0021] Optionally, one end of the water inlet pipe close to the chelating tank extends into the inner side of the chelating tank, and the peripheral wall is provided with a water inlet avoidance opening for avoiding the water inlet pipe.

[0022] By adopting the above technical solution, when the water level in the chelating tank is lower than the water inlet pipe, one end of the water inlet pipe extends into the inner wall of the chelating tank. When the water inlet pipe injects wastewater into the chelating tank, the wastewater flows out along a parabolic path, making it difficult for the wastewater to enter between the thin-walled liner and the inner wall of the chelating tank through the water inlet avoidance port.

[0023] In summary, the present application includes at least one of the following beneficial technical effects:

[0024] 1. When stubborn and difficult-to-remove attachments form on the inside of the chelating tank after long-term use, the thin-walled liner can be removed from the chelating tank, and then the peripheral wall and the grooved bottom wall of the thin-walled liner can be disassembled. This makes the thin-walled liner easier to clean. In addition, the thin-walled liner uses less material, and the thin-walled liner can be directly discarded and replaced with a new one when necessary. The thin-walled liner can be directly replaced, which is beneficial to ensure the efficiency of wastewater treatment.

[0025] 2. The outlet pipe uses a three-way joint to achieve the bending and reversing of the pipeline path. The port of the three-way joint that is not connected to the pipe body is sealed with a seal. When the outlet pipe is blocked, the seal can be removed and then the blockage can be cleared out with tools to facilitate the treatment of the blockage problem of the outlet pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of this embodiment.

[0027] Figure 2 yes Figure 1 A magnified partial view of point A in the middle.

[0028] Figure 3 It is a schematic structural diagram of the thin-walled liner of this embodiment.

[0029] Description of reference numerals:

[0030] 1. Chelating tank; 2. Stirring mechanism; 3. Water inlet pipe; 4. Water outlet pipe; 40. Pipe body; 41. Tee joint; 411. Fixed flange; 42. Seal; 421. Flange blind plate; 422. Sealing gasket; 423. Threaded fastener; 424. Filling plunger; 5. Thin-walled liner; 51. Peripheral wall; 511. Longitudinal sealant layer; 52. Grooved bottom wall; 521. Peripheral sealing layer; 53. Water outlet avoidance port; 54. Water inlet avoidance port; 6. Sealing sleeve; 61. Water retaining flange; 7. Support ring; 71. Longitudinal section seam; 8. Clamping piece; 81. Inner hoop ring; 82. Limiting flange; 83. Deformation slit. DETAILED DESCRIPTION

[0031] The following is combined with Figure 1-3 This application is described in further detail.

[0032] The present application discloses a highly efficient treatment device for industrial wastewater containing heavy metals. Figure 1 The high-efficiency treatment device for industrial wastewater containing heavy metals comprises a chelating tank 1 and a stirring mechanism 2. A water inlet pipe 3 is provided at the top of the chelating tank 1, and a water outlet pipe 4 is provided at the bottom of the chelating tank 1. The water outlet pipe 4 is used to connect the solid-liquid separation device. The stirring mechanism 2 is used to stir the wastewater in the chelating tank 1. The wastewater is input into the chelating tank 1 from the water inlet pipe 3, and is fully chelated and flocculated under the stirring and mixing of the stirring mechanism 2. The treated wastewater is then transported to the solid-liquid separation device through the water outlet pipe 4 for solid-liquid separation.

[0033] Reference Figure 2 and Figure 3 A thin-walled liner 5 is provided on the inner side of the chelating tank 1. The material of the thin-walled liner 5 is a flexible material such as plastic or rubber. The thin-walled liner 5 includes a peripheral wall 51 and a groove-shaped bottom wall 52. The peripheral wall 51 is a cylindrical structure with two ends joined by sealant. The sealant at the joint of the peripheral wall 51 forms a longitudinal sealant layer 511. The outer peripheral surface of the peripheral wall 51 fits the inner peripheral surface of the chelating tank 1. The peripheral wall 51 and the groove-shaped bottom wall 52 are joined by sealant to form a circumferential sealing layer 521. A detachable sealing connection is formed between the peripheral wall 51 and the groove-shaped bottom wall 52; the groove-shaped bottom wall 52 is provided with a water outlet avoidance port 53 for connecting to the water outlet pipe 4. A sealing sleeve 6 made of rubber is inserted at one end of the water outlet pipe 4 close to the chelating tank 1. A water retaining flange 61 is provided at one end of the sealing sleeve 6. The water retaining flange 61 is pressed against the groove-shaped bottom wall 52, and the water retaining flange 61 and the groove-shaped bottom wall 52 are sealed by sealant.

[0034] The waste water discharged from the water inlet pipe 3 into the chelating tank 1 is contained in the thin-walled inner liner 5. When the chelating tank 1 forms stubborn and difficult-to-remove attachments after long-term use, the thin-walled inner liner 5 can be taken out of the chelating tank 1, and then the peripheral wall 51 and the grooved bottom wall 52 of the thin-walled inner liner 5 can be disassembled, so that the thin-walled inner liner 5 can be easier to clean.

[0035] Reference Figure 2 The end of the water inlet pipe 3 near the chelating tank 1 extends into the inner side of the chelating tank 1, and the peripheral wall 51 is provided with a water inlet avoidance opening 54 for avoiding the water inlet pipe 3. After the wastewater enters the inner side of the chelating tank 1, it mainly contacts the thin-walled inner liner 5. When the water level in the chelating tank 1 is lower than the water inlet pipe 3, the water inlet pipe 3 is extended into the inner side of the chelating tank 1, which can minimize the wastewater from entering the gap between the thin-walled inner liner 5 and the chelating tank 1.

[0036] Reference Figure 2 A support ring 7 is provided at the bottom of the thin-walled liner 5. The support ring 7 shields the joint between the peripheral wall 51 and the groove-shaped bottom wall along the circumferential direction, and the support ring 7 is provided with a longitudinal cutting seam 71. The support ring 7 can shield the joint between the peripheral wall 51 and the groove-shaped bottom wall 52, so that the wastewater flow is not easy to scour and penetrate the circumferential sealing layer 521.

[0037] Reference Figure 1 The top of the chelating tank 1 is provided with a clamping member 8, which includes an inner hoop ring 81 and a limiting flange 82 located at one end of the inner hoop ring 81. The inner hoop ring 81 is provided with a deformation slit 83, and the deformation slit 83 is along the axial direction of the inner hoop ring 81. The inner hoop ring 81 and the chelating tank 1 clamp the peripheral wall 51 with a clamping force of interference fit; the limiting flange 82 abuts against the upper edge of the chelating tank 1. The inner hoop ring 81 of the clamping member can clamp the peripheral wall 51 together with the chelating tank 1, so that the upper end of the thin-walled liner 5 is positioned, which is conducive to keeping the position of the thin-walled liner 5 stable.

[0038] Reference Figure 1 The outlet pipe 4 includes a pipe body 40 and multiple three-way joints 41, and the outlet pipe 4 has multiple bending parts; the three-way joint 41 is located at the bending part of the outlet pipe 4, and the three-way joint 41 is connected to the pipe body 40 of the outlet pipe 4 through two mutually perpendicular ports, and the other port of the three-way joint 41 is detachably connected with a seal 42, and the three-way joint 41 is welded and fixed with a fixed flange 411 at the port corresponding to the seal 42, and the seal 42 includes a flange blind plate 421 and a sealing gasket 422, and the fixed flange 411 is connected with the flange blind plate 421 through a threaded fastener 423, and the threaded fastener 423 is a bolt and nut assembly, and the sealing gasket 422 is located between the fixed flange 411 and the flange blind plate 421.

[0039] The water outlet pipe 4 realizes the bending and reversing of the pipeline path through the three-way joint 41. The port of the three-way joint 41 that is not connected to the pipe body 40 is sealed by the seal 42. When the water outlet pipe 4 is blocked, the flange blind plate 421 and the sealing gasket 422 can be removed, and then the blockage can be cleared out with tools to facilitate the treatment of the blockage problem of the water outlet pipe 4.

[0040] Reference Figure 1 A filling plunger 424 is welded and fixed to the flange blind plate 421. The filling plunger 424 is located on the inner side of the tee joint 41 and occupies the inner cavity of the end of the tee joint 41 close to the flange blind plate 421, making it difficult for sediment in the wastewater to occupy the inner cavity of the end of the tee joint 41 close to the flange blind plate 421, making the outlet pipe 4 easier to clean.

[0041] The implementation principle of the high-efficiency treatment device of heavy metal-containing industrial wastewater in the embodiment of the present application is as follows: the sewage containing heavy metals is discharged into the chelating tank 1 through the water inlet pipe 3 for flocculation and chelation reaction. After the wastewater enters the chelating tank 1, it is stored in the thin-walled inner liner 5. When the chelating tank 1 forms stubborn and difficult-to-remove attachments after long-term use, the thin-walled inner liner 5 can be taken out of the chelating tank 1, and then the peripheral wall 51 and the grooved bottom wall 52 of the thin-walled inner liner 5 can be disassembled. In this way, the thin-walled inner liner 5 can be easier to clean. In addition, the thin-walled inner liner 5 uses less material, and the thin-walled inner liner 5 can be directly discarded and replaced with a new one when necessary.

[0042] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A highly efficient treatment device for heavy metal-containing industrial wastewater, comprising a chelating tank (1), wherein the upper portion of the chelating tank (1) is provided with a water inlet pipe (3), and the bottom portion of the chelating tank (1) is provided with a water outlet pipe (4), characterized in that: A thin-walled inner liner (5) is provided on the inner side of the chelating tank (1), and the thin-walled inner liner (5) comprises a peripheral wall (51) and a groove-shaped bottom wall (52); the outer peripheral surface of the peripheral wall (51) fits the inner peripheral surface of the chelating tank (1), and a detachable sealed connection is formed between the peripheral wall (51) and the groove-shaped bottom wall (52); the groove-shaped bottom wall (52) is provided with a water outlet avoidance opening (53) for communicating with the water outlet pipe (4); a sealing sleeve (6) is inserted at one end of the water outlet pipe (4) close to the chelating tank (1); a water retaining flange (61) is provided at one end of the sealing sleeve (6), and the water retaining flange (61) is pressed against the groove-shaped bottom wall (52).

2. The high-efficiency treatment device for heavy metal-containing industrial wastewater according to claim 1, characterized in that: The thin-walled liner (5) is flexible, the peripheral wall (51) is a cylindrical structure with two ends joined, a longitudinal sealing rubber layer (511) is provided at the joint of the peripheral wall (51), and a circumferential sealing rubber layer is provided at the joint between the peripheral wall (51) and the groove-shaped bottom wall (52).

3. The high-efficiency treatment device for heavy metal-containing industrial wastewater according to claim 2 is characterized in that: A clamping member (8) is provided at the top of the chelating tank (1), the clamping member (8) comprising an inner hoop ring and a limiting flange (82) located at one end of the inner hoop ring, the inner hoop ring is provided with a deformation slit (83), the deformation slit (83) is along the axial direction of the inner hoop ring, the inner hoop ring and the chelating tank (1) clamp the peripheral wall (51) with an interference fit clamping force; the limiting flange (82) abuts against the upper edge of the chelating tank (1).

4. The high-efficiency treatment device for heavy metal-containing industrial wastewater according to claim 1 is characterized in that: The water outlet pipe (4) comprises a pipe body (40) and a plurality of three-way joints (41), the water outlet pipe (4) having a plurality of bending parts; the three-way joint (41) is located at the bending part of the water outlet pipe (4), the three-way joint (41) is connected to the pipe body (40) of the water outlet pipe (4) via two ports perpendicular to each other, and the other port of the three-way joint (41) is detachably connected to a sealing member (42).

5. The high-efficiency treatment device for heavy metal-containing industrial wastewater according to claim 4 is characterized in that: The three-way joint (41) is provided with a fixed flange (411) at a port corresponding to the sealing member (42); the sealing member (42) comprises a flange blind plate (421) and a sealing gasket (422); the fixed flange (411) is connected to the flange blind plate (421) via a threaded fastener (423); and the sealing gasket (422) is located between the fixed flange (411) and the flange blind plate (421).

6. The high-efficiency treatment device for heavy metal-containing industrial wastewater according to claim 5, characterized in that: The blind flange plate (421) is fixedly provided with a filling plunger (424), the filling plunger (424) being located inside the three-way joint (41) and occupying an inner cavity of the three-way joint (41) close to the end of the blind flange plate (421).

7. The high-efficiency treatment device for heavy metal-containing industrial wastewater according to claim 1, characterized in that: A support ring (7) is provided at the bottom of the thin-walled liner (5), the support ring (7) shielding the joint seam between the peripheral wall (51) and the groove-shaped bottom wall (52) along the circumferential direction, and the support ring (7) is provided with a longitudinal section seam (71).

8. The high-efficiency treatment device for heavy metal-containing industrial wastewater according to claim 1, characterized in that: One end of the water inlet pipe (3) close to the chelating tank (1) extends into the inner side of the chelating tank (1), and the peripheral wall (51) is provided with a water inlet avoidance opening (54) for avoiding the water inlet pipe (3).

Images