Metal surface passivation wastewater treatment device

Abstract

The utility model discloses a metal surface passivation wastewater treatment device which comprises a bottom plate, a multi-stage reactor and a filter tower which are supported by a support frame are arranged on the outer wall of the top of the bottom plate, the multi-stage reactor comprises a plurality of conical barrels and feed pipes which are arranged in parallel, and the feed pipes are communicated with the conical barrels. The feeding pipe is arranged on one side of the top end of the conical barrel along the tangent line of the conical barrel, an overflow pipe is arranged on the top of the conical barrel, the feeding pipe and the overflow pipe of every two adjacent conical barrels are connected with each other, a dosing port is formed in the top of the connecting end of the feeding pipe and the conical barrel, and the dosing port is communicated with an external dosing pump. The top of the filtering tower is connected with the overflow pipe of the adjacent conical barrel through a communicating pipe; according to the utility model, the multi-stage reactor is arranged, the medicament is quickly diffused by utilizing the vortex shearing force formed by tangential water inlet, so that the medicament is fully mixed with the wastewater, and iron ions in the wastewater are separated from the wastewater through centrifugal sedimentation.

Description

Technical Field

[0001] This utility model relates to the technical field of wastewater treatment devices, and in particular to a wastewater treatment device for metal surface passivation. Background Technology

[0002] Wastewater from metal surface passivation typically contains heavy metal ions (such as chromium, nickel, and zinc), acidic or alkaline substances, surfactants, and other chemical additives. Direct discharge of this wastewater can pollute the environment, thus requiring treatment. Existing treatment systems generally include equalization tanks, chemical reaction tanks, sedimentation tanks, and filters. The equalization tank adjusts the pH of the wastewater, the chemical reaction tank reacts chromium in the wastewater with hydroxides to form chromium hydroxide precipitate, the sedimentation tank precipitates chromium hydroxide, and the filter removes suspended solids from the wastewater.

[0003] A search revealed a Chinese patent publication number CN213171839U, which discloses a stainless steel passivation wastewater treatment device. The device includes a support frame body, an inlet, a feed inlet, a second tank, and a third tank. The first, second, and third tanks are installed inside the support frame body. The upper right side of the first tank is connected to the second tank via a conveying mechanism, and the lower right side of the second tank is connected to the third tank via the same conveying mechanism. An inlet is screwed onto the upper left side of the first tank. A feed inlet is installed through the top of the first tank. A vertical rod is connected to the internal bearing of the first tank, with its top end penetrating the upper surface of the first tank. A connecting sleeve is threaded onto the lower outer side of the vertical rod.

[0004] This patented design incorporates a cover with a mesh-like structure on all sides to effectively shield the sediment at the bottom, allowing for good separation of the sediment from the upper clear liquid. However, the neutralization, reduction, and coagulation reactions are all completed within a single tank, resulting in low mixing efficiency and the potential for sedimentation dead zones. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a wastewater treatment device for metal surface passivation.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A wastewater treatment device for metal surface passivation includes a base plate. A multi-stage reactor and a filter tower supported by a support frame are arranged on the top outer wall of the base plate. The multi-stage reactor includes multiple parallel conical cylinders and a feed pipe. The feed pipe is arranged along the tangent of the conical cylinder on one side of the top of the conical cylinder. An overflow pipe is provided at the top of the conical cylinder. The feed pipes and overflow pipes of two adjacent conical cylinders are connected to each other. A dosing port is provided at the top of the connection end between the feed pipe and the conical cylinder. The dosing port is connected to an external dosing pump. The top of the filter tower is connected to the overflow pipe of the adjacent conical cylinder through a connecting pipe.

[0008] As a further improvement of this utility model: detection sensors are installed on the inner wall of the connection end between the overflow pipe and the conical cylinder and on the inner wall of the conical cylinder. The detection sensors are PH / ORP sensors.

[0009] As a further improvement of this utility model: the bottom ends of the plurality of conical cylinders are all connected to sewage outlet pipes, and the other end of the sewage outlet pipes are connected to a sludge box disposed on the top outer wall of the base plate.

[0010] As a further improvement of this utility model: the inner wall of the filter tower is provided with multiple filter plates, the aperture of the multiple filter plates decreasing from top to bottom, and the bottom inner wall of the filter tower is provided with a guide cone hopper, the bottom end of the guide cone hopper being connected to a drain pipe.

[0011] As a further improvement of this utility model: the filter plate is fixed to the inner wall of the filter tower by a fixing frame, and the fixing frame is provided with multiple through holes near the outer side of the filter tower, and the inner wall of the through holes is sealed with a sealing block.

[0012] As a further improvement of this utility model: a telescopic rod is fixed to the top of the filter tower, and a linkage shaft is connected to the telescopic end of the telescopic rod. The side wall of the linkage shaft is connected to the enclosed block through a connecting frame.

[0013] As a further embodiment of this utility model: the inner wall of the filter tower is provided with a plurality of water spray pipes located below the filter plate, the water spray pipes are connected to an external water supply system, the side wall of the water spray pipes is provided with nozzles facing the filter plate, one end of the drain pipe is connected to an electric three-way valve, and the two outlets of the electric three-way valve are respectively connected to an external sludge treatment system and a water discharge system.

[0014] Compared with the prior art, this utility model provides a metal surface passivation wastewater treatment device, which has the following beneficial effects:

[0015] 1. This utility model, by setting up a multi-stage reactor, utilizes the vortex shear force formed by tangential water inflow to rapidly diffuse the reagent, so that the reagent is fully mixed with the wastewater, and separates the iron ions in the wastewater from the wastewater through centrifugal sedimentation.

[0016] 2. This utility model, by setting up a detection sensor, detects the pH / ORP values ​​of wastewater and reagent at the initial stage and after complete mixing, and controls the subsequent dosage based on the detection data, thereby achieving dynamic adjustment of the dosage.

[0017] 3. This utility model, by comprising a fixed frame, a sealing block, a connecting frame, a linkage shaft, a telescopic rod, and an electric three-way valve, backwashes the filter plates after the device has been running for a period of time, thereby cleaning the filter plates.

[0018] The parts of this device not covered herein are the same as or can be implemented using existing technologies. This utility model has a simple structure and is easy to operate. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of a metal surface passivation wastewater treatment device proposed in this utility model;

[0020] Figure 2 This is a schematic diagram of the internal structure of a metal surface passivation wastewater treatment device proposed in this utility model;

[0021] Figure 3 This is an enlarged view of the overflow pipe of the metal surface passivation wastewater treatment device proposed in this utility model;

[0022] Figure 4 This is a partial structural schematic diagram of a metal surface passivation wastewater treatment device proposed in this utility model.

[0023] In the diagram: 1. Base plate; 2. Filter tower; 3. Conical cylinder; 4. Feed pipe; 5. Chemical dosing port; 6. Sludge outlet pipe; 7. Sludge tank; 8. Connecting pipe; 9. Drain pipe; 10. Overflow pipe; 11. Detection sensor; 12. Filter plate; 13. Fixing frame; 14. Sealing block; 15. Connecting frame; 16. Linkage shaft; 17. Telescopic rod; 18. Electric three-way valve; 19. Guide cone bucket; 20. Water spray pipe. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0025] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0026] Example 1

[0027] A metal surface passivation wastewater treatment device, such as Figures 1 to 3 As shown, the system includes a base plate 1. A multi-stage reactor and a filter tower 2, supported by a support frame, are mounted on the top outer wall of the base plate 1. The multi-stage reactor includes multiple parallel conical cylinders 3 and feed pipes 4. The feed pipes 4 are positioned along the tangent of the conical cylinders 3 on one side of the top of the conical cylinders 3. An overflow pipe 10 is located at the top of the conical cylinders 3. The feed pipes 4 and overflow pipes 10 of adjacent conical cylinders 3 are interconnected. A dosing port 5 is located at the top of the connection end between the feed pipe 4 and the conical cylinder 3, and the dosing port 5 is connected to an external dosing pump. The top of the filter tower 2 is connected to the overflow pipe 10 of the adjacent conical cylinder 3 via a connecting pipe 8. Detection sensors 11 are installed on the inner wall of the connection end between the overflow pipe 10 and the conical cylinder 3, and on the inner wall of the conical cylinder 3. The detection sensors 11 are pH / ORP sensors. Sensors for detecting the pH / ORP value of liquids are existing mature technologies, and their working principles and basic structures are well known to those skilled in the art; therefore, they will not be described in detail here.

[0028] The bottom ends of the multiple conical cylinders 3 are connected to sewage outlet pipes 6, and the other end of the sewage outlet pipes 6 are connected to sludge boxes 7 located on the top outer wall of the bottom plate 1. The inner wall of the filter tower 2 is provided with multiple filter plates 12, and the aperture of the multiple filter plates 12 decreases from top to bottom. The bottom inner wall of the filter tower 2 is provided with guide conical buckets 19, and the bottom end of the guide conical buckets 19 is connected to drain pipes 9.

[0029] Wastewater enters the first-stage conical reactor 3 tangentially from the feed pipe 4 through the first feed pipe 4. A dosing pump adds chemicals to the wastewater through the dosing port 5 to adjust the pH value. The wastewater, mixed with chemicals, enters the conical reactor 3 tangentially, forming a vortex. Utilizing the shear force of the vortex created by the tangential water inflow, the chemicals are rapidly diffused, ensuring thorough mixing between the chemicals and the wastewater. Iron ions in the wastewater are centrifugally settled and enter the sludge tank 7 through the effluent pipe 6. The liquid in the wastewater flows from the overflow pipe 10 into the next stage conical reactor 3. A sensor 11 in the conical reactor 3 detects the wastewater level. The pH value at the initial stage and after complete mixing with the reagent is used to control the subsequent dosage based on the test data. Multiple conical cylinders 3 in the multi-stage reactor sequentially treat the wastewater for neutralization, reduction and flocculation. These treatment operations are all mature technologies in the field, and those skilled in the art are familiar with the principles and operations of these treatments, so they will not be described in detail here. The wastewater treated by the multi-stage reactor enters the filter tower 2 through the connecting pipe 8. Multiple filter plates 12 filter and purify the wastewater. After filtration, the water is collected through the guide conical bucket 19 and discharged from the drain pipe 9.

[0030] By setting up a multi-stage reactor, the reagent is rapidly diffused using the vortex shear force formed by tangential water inflow, so that the reagent is fully mixed with the wastewater, and the iron ions in the wastewater are separated from the wastewater by centrifugal sedimentation.

[0031] By setting up a detection sensor 11, the pH / ORP values ​​of wastewater and reagent are detected at the initial stage and after complete mixing. The subsequent dosage is controlled based on the detection data, thereby realizing dynamic adjustment of the dosage.

[0032] Example 2

[0033] A wastewater treatment device for metal surface passivation is provided in this embodiment, which is based on embodiment 1 and makes the following improvements, such as... Figure 2 and Figure 4 As shown, the filter plate 12 is fixed to the inner wall of the filter tower 2 by a fixing frame 13. The fixing frame 13 is provided with multiple through holes near the outer side of the filter tower 2. The inner wall of the through holes is sealed with a sealing block 14. A telescopic rod 17 is fixed to the top of the filter tower 2. The telescopic end of the telescopic rod 17 is connected to a linkage shaft 16. The side wall of the linkage shaft 16 is connected to the sealing block 14 through a connecting frame 15. Multiple water spray pipes 20 located below the filter plate 12 are provided on the inner wall of the filter tower 2. The water spray pipes 20 are connected to an external water supply system. The side wall of the water spray pipes 20 is provided with nozzles facing the filter plate 12. One end of the drain pipe 9 is connected to an electric three-way valve 18. The two outlets of the electric three-way valve 18 are connected to an external sludge treatment system and a water discharge system, respectively.

[0034] After the device has been running for a period of time, the nozzles on the spray pipe 20 spray water from below the filter plate 12 to backwash the filter plate 12. The water flow can separate the sludge from the filter plate 12. At the same time, the telescopic rod 17 pushes the linkage shaft 16 to move down, which drives the sealing block 14 to move down through the connecting frame 15, so that the sealing block 14 is separated from the through hole. The flushing water carrying the sludge gathers from the through hole to the bottom of the filter tower 2. The electric three-way valve 18 switches the connection path, so that the drain pipe 9 is connected to the sludge treatment system, and the flushing water and sludge enter the sludge treatment system.

[0035] The filter plate 12 is backwashed after the device has been running for a period of time, thanks to the installation of a fixed frame 13, a sealing block 14, a connecting frame 15, a linkage shaft 16, a telescopic rod 17, and an electric three-way valve 18. This process cleans the filter plate 12.

[0036] Working Principle: Wastewater enters the first-stage conical cylinder 3 tangentially from the feed pipe 4 along the conical cylinder 3. A dosing pump adds chemicals to the wastewater through the dosing port 5 to adjust the pH value. The wastewater mixed with chemicals enters the conical cylinder 3 tangentially, forming a vortex. Utilizing the shear force of the vortex created by the tangential water inflow, the chemicals are rapidly diffused, ensuring thorough mixing between the chemicals and wastewater. Iron ions in the wastewater are centrifugally settled and enter the sludge tank 7 through the effluent pipe 6. The liquid in the wastewater flows through the overflow pipe 10 into the next stage conical cylinder 3. A sensor 11 in the conical cylinder 3 detects the pH value of the wastewater and chemicals at the initial stage of mixing and after complete mixing. Based on the detection data, the subsequent chemical dosing is controlled. Multiple conical cylinders 3 in the multi-stage reactor sequentially treat the wastewater through neutralization, reduction, and flocculation. These treatment operations are all mature technologies in this field. Those skilled in the art are familiar with the principles and operations of these treatments, so they will not be described in detail here. Wastewater treated by the multi-stage reactor enters the filter tower 2 through the connecting pipe 8. Multiple filter plates 12 filter and purify the wastewater. After filtration, the water is collected through the guide cone hopper 19 and discharged from the drain pipe 9. After the device has been running for a period of time, the nozzles on the spray pipe 20 spray water from below the filter plates 12 to backwash the filter plates 12. The water flow can separate the sludge from the filter plates 12. At the same time, the telescopic rod 17 pushes the linkage shaft 16 to move down, which drives the sealing block 14 to move down through the connecting frame 15, so that the sealing block 14 is separated from the through hole. The flushing water carrying the sludge gathers from the through hole to the bottom of the filter tower 2. The electric three-way valve 18 switches the connection path, so that the drain pipe 9 is connected to the sludge treatment system, and the flushing water and sludge enter the sludge treatment system.

[0037] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A metal surface passivation wastewater treatment device comprising a base plate (1), characterized in that, The outer wall of the top of the bottom plate (1) is provided with a multi-stage reactor and a filter tower (2) supported by a support frame, the multi-stage reactor comprises a plurality of parallelly arranged conical cylinders (3) and a feed pipe (4), the feed pipe (4) is arranged at one side of the top end of the conical cylinder (3) along the tangent of the conical cylinder (3), the top of the conical cylinder (3) is provided with an overflow pipe (10), the feed pipe (4) and the overflow pipe (10) of the adjacent two conical cylinders (3) are connected with each other, the top of the connecting end of the feed pipe (4) and the conical cylinder (3) is provided with a dosing port (5), the dosing port (5) is communicated with an external dosing pump, and the top of the filter tower (2) is connected with the overflow pipe (10) of the conical cylinder (3) adjacent thereto through a communication pipe (8).

2. A metal surface passivation wastewater treatment device according to claim 1, characterized in that, The inner wall of the connecting end of the overflow pipe (10) and the inner wall of the conical cylinder (3) are both provided with a detection sensor (11), and the detection sensor (11) is a PH / ORP sensor.

3. The metal surface passivation wastewater treatment device according to claim 1, characterized in that, The bottom end of each of the plurality of conical cylinders (3) is connected with a sewage outlet pipe (6), and the other end of the sewage outlet pipe (6) is communicated with a sludge tank (7) arranged on the outer wall of the top of the bottom plate (1).

4. The metal surface passivation wastewater treatment device according to claim 1, characterized in that, The inner wall of the filter tower (2) is provided with a plurality of filter plates (12), the pore diameters of the plurality of filter plates (12) from top to bottom gradually decrease, and the bottom inner wall of the filter tower (2) is provided with a guide conical hopper (19), and the bottom end of the guide conical hopper (19) is connected with a drain pipe (9).

5. A metal surface passivation wastewater treatment device according to claim 4, wherein The filter plates (12) are fixed to the inner wall of the filter tower (2) through fixing frames (13), and the fixing frames (13) are provided with a plurality of through holes close to the outer side of the filter tower (2), and the inner wall of the through hole is sealingly matched with a sealing block (14).

6. A metal surface passivation wastewater treatment device according to claim 4, characterized in that, The top of the filter tower (2) is fixed with a telescopic rod (17), the telescopic end of the telescopic rod (17) is connected with a linkage shaft (16), and the side wall of the linkage shaft (16) is connected with the sealing block (14) through a connecting frame (15).

7. A metal surface passivation wastewater treatment apparatus according to claim 6, wherein The inner wall of the filter tower (2) is provided with a plurality of water spray pipes (20) below the filter plates (12), the water spray pipes (20) are connected with an external water supply system, the side wall of the water spray pipe (20) is provided with a spray port facing the filter plate (12), and one end of the drain pipe (9) is connected with an electric three-way valve (18), and the two water outlets of the electric three-way valve (18) are respectively connected with an external sludge treatment system and a water discharge system.

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