A zero-discharge recycling treatment device for electroplating heavy metal wastewater

Abstract

The invention discloses a zero-discharge reuse treatment device for electroplating heavy metal wastewater, which relates to the technical field of electroplating heavy metal wastewater treatment, including a flocculation unit; the flocculation unit includes a treatment tank, a filter assembly and a power assembly; the filter assembly is connected with a discharge main pipe and a liquid inlet main pipe; the filter assembly includes a filter cartridge, a liquid inlet branch pipe, and a cleaning assembly; a plurality of filter cartridges are arranged in an array; the filter cartridge includes a solid pipe section and a mesh section; the liquid inlet branch pipe includes a first branch pipe, a rotating branch pipe, a second branch pipe, a third branch pipe and a solid shaft connected in a straight line; the liquid inlet branch pipe can flow into a liquid prepared by a flocculant to improve the mixing effect of the flocculant and the wastewater, and can also spray the filter cartridge to avoid clogging of the filter cartridge; a discharge branch pipe is provided at the end of the filter cartridge extending out of the filter tank, and the apertures of the plurality of filter cartridges are different. By discharging materials from the discharge branches at different heights, different filtering effects can be guaranteed, the device has strong applicability, simple structure and convenient operation.

Description

Technical Field

[0001] The invention relates to the technical field of electroplating heavy metal wastewater treatment, and in particular to a zero-discharge recycling treatment device for electroplating heavy metal wastewater. Background Art

[0002] Electroplating is the process of plating a thin layer of other metals or alloys on certain metal surfaces using the principle of electrolysis. It is a process that uses electrolysis to adhere a layer of metal film to the surface of metal or other material parts, thereby preventing metal oxidation (such as rust), improving wear resistance, conductivity, reflectivity, corrosion resistance (copper sulfate, etc.) and enhancing aesthetics.

[0003] In the prior art, when flocculants are used to react and remove metal ions in wastewater, the flocculants are used in a relatively concentrated manner, and cannot be fully mixed and contacted with the wastewater, and the contact area between the flocculants and the wastewater cannot be increased, and the removal efficiency of heavy metals in wastewater is not very high.

[0004] A Chinese patent with application number CN202111386258.6 discloses a zero-discharge reuse treatment device and process for electroplating heavy metal wastewater, which relates to the technical field of zero-discharge reuse treatment of electroplating heavy metal wastewater, including a collecting unit, a treatment unit is arranged on the top of the collecting unit, an aqueous agent mixing unit is arranged on the outer upper end of the treatment unit, a conveying unit is arranged on the top of the treatment unit, a filter unit is arranged on the side of the treatment unit, and the filter unit is connected to the conveying unit. However, if the filter unit is blocked during use, it cannot be cleaned online and must be shut down, which affects the treatment efficiency. Summary of the invention

[0005] The main technical problem to be solved by the present invention is to provide a zero-discharge and reuse treatment device for electroplating heavy metal wastewater, which can solve the problems mentioned in the above background technology.

[0006] In order to solve the above-mentioned main technical problems, the following technical solutions are adopted:

[0007] A zero-discharge recycling treatment device for electroplating heavy metal wastewater, comprising a flocculation unit; the flocculation unit comprises a treatment tank, a filter assembly and a power assembly; the filter assembly is connected with a discharge main pipe of a clear liquid and a liquid inlet main pipe of a flocculated liquid; the filter assembly comprises a filter cartridge, a liquid inlet branch pipe, and a cleaning assembly; a plurality of filter cartridges are arranged in an array; the filter cartridge comprises a solid pipe section and a mesh section; the solid pipe section is horizontally inserted into the treatment tank and one end extends out of the treatment tank; the mesh section is located in the treatment tank; the end of the solid pipe section extending out of the treatment tank is provided with a discharge branch pipe connected to the discharge main pipe; the liquid inlet branch pipe corresponds to the filter cartridge one by one, and The two are coaxially sleeved; the liquid inlet branch pipe includes a first branch pipe, a rotating branch pipe, a second branch pipe, a third branch pipe and a solid shaft which are connected in a straight line; the first branch pipe is connected to the liquid inlet main pipe; the second branch pipe is horizontally inserted into the end face of the solid pipe section; the circumferential surface of the second branch pipe located outside the filter cylinder is connected to the power component, and can drive the third branch pipe and the solid shaft to rotate under the action of the power component; a plurality of liquid injection holes are opened on the third branch pipe; the solid shaft is rotatably connected to the end of the mesh section; the cleaning component is connected to the end of the solid shaft passing through the mesh section; when the third branch pipe rotates, the cleaning component automatically cleans the mesh section.

[0008] Preferably, the mesh sections of the plurality of filter cartridges have the same pore size or gradually decrease from bottom to top.

[0009] Preferably, a first liquid inlet valve is provided on the liquid inlet branch pipe, and a second liquid inlet valve is connected to the liquid inlet main pipe; a first discharge valve is provided on the discharge branch pipe, and a second discharge valve is connected to the discharge main pipe; the first liquid inlet valve, the second liquid inlet valve, the first discharge valve and the second discharge valve are all coupled to the control system and can be automatically opened and closed under the action of the control system.

[0010] Preferably, the cleaning assembly includes a first gear, a second gear, a brush shaft, and a rotating head; bristles are attached to the circumferential surface of the brush shaft, and the length of the bristles along the axis of the brush shaft is greater than or equal to the length of the mesh segment in this direction; the first gear sleeve is mounted on a solid shaft; the second gear sleeve is mounted on one end of the brush shaft; the first gear and the second gear are meshed with each other; a circular track is provided on the inner wall of the treatment tank which surrounds the filter cartridge; the other end of the brush shaft is slidably connected to the circular track through a rotating head.

[0011] Preferably, one end of the solid shaft is mounted on the inner wall of the treatment tank via a rotating base; a rotating ring is sleeved on the solid shaft; a connecting rod is provided on the circumference of the rotating ring; and the connecting rod is mounted on the brush shaft.

[0012] Preferably, the treatment pool is provided with a wastewater inlet, a sedimentation outlet, and a pressure-stabilizing gas outlet; the liquid inlet main pipe is connected to the mixing unit; the discharge main pipe is connected to the clear liquid sterilization unit through a first branch or through a second branch; the second branch is connected to the first branch; the second branch is connected to a liquid pump and a third valve.

[0013] Preferably, a blowing pipe is provided on the outer side of some of the blowing liquid inlet holes; the blowing pipe forms an included angle of a certain preset angle with the circumference of the third branch pipe.

[0014] Preferably, the power assembly includes a third gear, a fourth gear, a power motor and a three-axis linear module; multiple third gears correspond one-to-one to multiple liquid inlet branches; the third gear is sleeved on the end of the second branch located outside the filter cylinder; the fourth gear is installed on the rotating shaft of the power motor; the three-axis linear module is adjacent to the side of the treatment tank; the power motor is installed on the three-axis linear module so as to drive the fourth gear to engage with one of the third gears.

[0015] Compared with the prior art, the present invention has the following advantages when applied to electroplating heavy metal wastewater treatment:

[0016] (1) The flocculation unit includes a filter assembly, which includes a filter cartridge, a liquid inlet branch, and a cleaning assembly. The liquid inlet branch can flow into a solution prepared with a flocculant to improve the mixing effect of the flocculant and wastewater, and can also flush the filter cartridge to avoid clogging of the filter cartridge. A discharge branch is provided at the end of the filter cartridge extending out of the filter tank. The pore sizes of the multiple filter cartridges are different. By discharging from the discharge branches at different heights, different filtering effects can be ensured. The system has strong applicability, simple structure, and convenient operation.

[0017] (2) The liquid inlet branch pipe can rotate under the action of the power component, further improving the mixing effect of the flocculant and the wastewater, and at the same time, the filter cartridge can be cleaned during the rotation of the liquid inlet branch pipe; the use of the spraying of the flocculant during the liquid inlet process and the friction cleaning of the cleaning component can ensure a good cleaning effect; at the same time, the cleaning process of the cleaning component does not require shutdown, thereby improving the treatment efficiency of heavy metal wastewater.

[0018] (3) The power assembly includes a fourth gear and a plurality of third gears. The fourth gear meshes with any third gear under the action of the three-axis module, so that a filter cartridge can be cleaned separately as needed to solve the problem that the filter cartridge near the bottom of the treatment tank is more prone to clogging.

[0019] (4) By controlling the opening and closing of the first discharge valve, the second discharge valve, and the third valve, the clear liquid can be discharged from different heights, thereby ensuring different treatment effects of the clear liquid. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 It is a schematic diagram of the overall structure;

[0022] Figure 2 It is a schematic diagram of the enlarged structure of the flocculation unit;

[0023] Figure 3 It is a schematic diagram of the enlarged structure of the filter assembly;

[0024] Figure 4 This is an enlarged structural schematic diagram of the third branch pipe in Example 1;

[0025] Figure 5 This is a schematic diagram of the enlarged structure of the third branch pipe in Example 4.

[0026] In the figure: 100 is a flocculation unit, 200 is a mixing unit, 300 is a clear liquid sterilization unit, 301 is a first branch, 302 is a second branch, 303 is a third valve, 304 is a liquid pump, 1 is a treatment tank, 11 is a wastewater inlet, 12 is a sedimentation outlet, 13 is a pressure-stabilizing gas port, 14 is a circular track, 2 is a filter assembly, 21 is a filter cartridge, 211 is a solid pipe section, 212 is a mesh section, 22 is a liquid inlet branch, 221 is a first branch, 222 is a rotating branch, 223 is a second branch, 224 is a third branch, 225 is a solid shaft, 226 is a blowing liquid inlet hole, 227 is a blowing pipe, 23 is a cleaning component, 231 is a first gear, 232 is a second gear, 233 is a brush shaft, 234 is a rotating head, 235 is a connecting rod, 236 is a rotating ring, 3 is a power component, 31 is a third gear, 32 is a fourth gear, 33 is a power motor, 34 is a three-axis linear module, 4 is a liquid inlet main pipe, 5 is a discharge main pipe, 51 is a discharge branch pipe, 61 is a first liquid inlet valve, 62 is a second liquid inlet valve, 63 is a first discharge valve, and 64 is a second discharge valve. DETAILED DESCRIPTION

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. In addition, all the connection relationships mentioned in the text do not refer to the direct connection of components, but refer to the fact that a better connection structure can be formed by adding or reducing connection accessories according to the specific implementation situation.

[0028] Embodiment 1

[0029] See also Figure 1 As shown, a zero-discharge reuse treatment device for electroplating heavy metal wastewater includes a mixing unit 200, a flocculation unit 100, and a clear liquid sterilization unit 300; the mixing unit 200 is used to compound the flocculant into a flocculation liquid, and the flocculation unit 100 is used to mix the wastewater with the flocculation liquid and perform a flocculation process; the clear liquid sterilization unit 300 is used to receive the clear liquid at the top of the flocculation unit 100 and perform a sterilization treatment for recycling; the mixing unit 200 is connected to the flocculation unit 100 through a liquid inlet main pipe 4; the flocculation unit 100 is connected to the clear liquid sterilization unit 300 through a discharge main pipe 5.

[0030] See also Figure 2 As shown, the flocculation unit 100 includes a treatment tank 1, a filtering component 2 and a power component 3; the treatment tank 1 is connected with a wastewater inlet 11, a sedimentation outlet 12 and a pressure-stabilizing air port 13; the wastewater inlet 11 is connected to the wastewater pipeline, the sedimentation outlet 12 is mainly used to discharge the sediment after flocculation, and is located at the bottom of the treatment tank 1. The pressure-stabilizing air port 13 is used to stabilize the pressure with other equipment or atmospheric pressure when the treatment tank 1 is in a closed state; the discharge main pipe 5 is connected to the clear liquid sterilization unit 300 through the first branch 301 or through the second branch 302; the second branch 302 is connected to the first branch 301; the second branch 302 is connected with a liquid pump 304 and a third valve 303, that is, the discharge main pipe 5 can use the height difference to realize the discharge of clear liquid, and can also use the liquid pump 304 to transport and extract, and can be switched as needed, and the liquid pump 304 and the third valve 303 can be controlled to open and close using a control system.

[0031] See also Figure 1-4As shown, the filter assembly 2 includes a filter cartridge 21 and a liquid inlet branch 22; a plurality of the filter cartridges 21 are arranged in an array, that is, the plurality of filter cartridges 21 can be distributed in a straight line, a rectangular distribution, a circular distribution or other conventional graphic distributions, the filter cartridge 21 includes a solid pipe section 211 and a mesh section 212, the solid pipe section 211 is laterally inserted into the treatment tank 1 and one end extends out of the treatment tank 1; the mesh section 212 is located in the treatment tank 1; the solid pipe section 211 and the mesh section 212 can be integrally formed or welded into a whole, the solid pipe section 211 has no holes on the circumference, and the mesh section 212 has holes on the circumference, so as to have a filtering effect. The mesh section 212 can also be a skeleton, and then the filter net is wound on the skeleton. The specific structure can refer to the prior art; the mesh sections 212 of the multiple filter cartridges 21 have the same or different apertures. When the apertures of the mesh sections 212 are different, in the height direction of the treatment tank 1, the apertures of the multiple filter cartridges 21 gradually decrease from bottom to top, that is, the higher the height of the filter cartridge 21, the more meshes it has; the end of the solid pipe section 211 extending out of the treatment tank 1 is provided with a discharge branch pipe 51, the discharge branch pipe 51 is connected to the discharge main pipe 5, and the number of the discharge branch pipes 51 corresponds to the number of the filter cartridges 21; the liquid inlet branch pipe 22 is connected to the process tank 1, and the liquid inlet branch pipe 22 is connected to the process tank 1. The filter cartridges 21 correspond one to one, and the liquid inlet branch pipe 22 is coaxially sleeved inside the filter cartridge 21, and the axis of the filter cartridge 21 is horizontal; the liquid inlet branch pipe 22 includes a first branch pipe 221, a rotating branch pipe 222, a second branch pipe 223, a third branch pipe 224 and a solid shaft 225 which are linearly connected in sequence; the first branch pipe 221 is connected to the liquid inlet main pipe 4; under the action of the rotating branch pipe 222, the second branch pipe 223 can rotate relative to the first branch pipe 221, and the structure of the rotating branch pipe 222 refers to the prior art; the second branch pipe 223 is horizontally inserted into the end face of the solid pipe section 211, that is, the second branch pipe 223 is inserted into the filter cartridge 21; The circumferential surface of the second branch pipe 223 located outside the filter cartridge 21 is connected to the power assembly 3, and can drive the third branch pipe 224 and the solid shaft 225 to rotate under the action of the power assembly 3, that is, the action of the power assembly 3 drives the second branch pipe 223, the third branch pipe 224, and the solid shaft 225 to rotate; a plurality of blowing liquid inlet holes 226 are opened on the third branch pipe 224; the blowing liquid inlet holes 226 can not only ensure the feeding of the flocculation liquid, but also spray the filter cartridge 21 to avoid clogging; the solid shaft 225 is rotatably connected to the end of the mesh section 212; the third branch pipe 224 rotates on its own, which can enhance the mixing effect of the flocculation liquid and the wastewater.

[0032] A first liquid inlet valve 61 is provided on the liquid inlet branch pipe 22, and a second liquid inlet valve 62 is connected to the liquid inlet main pipe 4; a first discharge valve 63 is provided on the discharge branch pipe 51, and a second discharge valve 64 is connected to the discharge main pipe 5; the first liquid inlet valve 61, the second liquid inlet valve 62, the first discharge valve 63, and the second discharge valve 64 are all coupled to the control system and can be automatically opened and closed under the action of the control system. The control system is not shown in the figure, and reference can be made to the prior art; different first liquid inlet valves 61 can control the operation of different liquid inlet branches 22, and by controlling the switch of the third control valve, different discharge branches 51 can be controlled to operate, that is, the discharge of clear liquid from different heights can be controlled, and the degree of clarification of the clear liquid can also be controlled. Reasonable selection can be made according to the types of wastewater and flocculants, with high applicability, simple structure and convenient operation.

[0033] Embodiment 2

[0034] See also Figure 3 The difference between the second embodiment and the first embodiment is that on the basis of retaining the first embodiment, the cleaning component 23 is connected to the end of the solid shaft 225 passing through the mesh section 212; when the third branch pipe 224 rotates, the cleaning component 23 automatically cleans the mesh section 212; the cleaning component 23 includes a first gear 231, a second gear 232, a brush shaft 233, and a rotating head 234; bristles are attached to the circumferential surface of the brush shaft 233, and the length of the bristles along the axis of the brush shaft 233 is greater than or equal to the length of the mesh section 212 in this direction; the first gear 231 is sleeved and installed on the solid shaft 225; the second gear 232 is sleeved and installed on one end of the brush shaft 233; the first gear 231 and the second gear 232 are meshed with each other; a filter cartridge 21 is provided on the inner wall of the treatment pool 1. The other end of the brush shaft 233 is slidably connected in the circular track 14 through a swivel 234. A swivel 234 is installed at one end of the brush shaft 233, and a second gear 232 is installed at the other end. After the first gear 231 rotates, the second gear 232 rotates around the first gear 231. After the liquid inlet branch pipe 22 rotates, the first gear 231 rotates. The first gear 231 rotates, driving the brush shaft 233 to rotate around the filter cartridge 21. During the rotation, the filter cartridge 21 is cleaned. In order to further ensure the smoothness of the cleaning process, one end of the solid shaft 225 is installed on the inner wall of the treatment tank 1 through a rotating base; a rotating ring 236 is sleeved on the solid shaft 225; a connecting rod 235 is provided on the circumferential surface of the rotating ring 236; the connecting rod 235 is installed on the brush shaft 233.

[0035] Embodiment 3

[0036] See also Figure 3The difference between the third embodiment and the second embodiment is that on the basis of retaining the second embodiment, the power assembly 3 includes a third gear 31, a fourth gear 32, a power motor 33 and a three-axis linear module 34; multiple third gears 31 correspond one by one to multiple liquid inlet branches 22; the third gear 31 is sleeved on the circumferential surface of the second branch 223 located outside the filter cylinder 21; the fourth gear 32 is installed on the rotating shaft of the power motor 33; the three-axis linear module 34 is adjacent to the side of the treatment tank 1; the power motor 33 is installed on the three-axis linear module 34 so as to drive the fourth gear 32 to engage with one of the third gears 31, and the three-axis linear module 34 can be set with reference to the existing technology.

[0037] A zero-discharge recycling process for electroplating heavy metal wastewater, comprising the following steps:

[0038] S1: A certain amount of wastewater enters treatment tank 1 after preliminary filtration of particulate impurities. The amount of wastewater can be adjusted according to the volume of treatment tank 1;

[0039] S2: The liquid prepared by the flocculant is sent from the liquid inlet main pipe 4 to the liquid inlet branch pipe 22, and then blown to the filter cartridge 21 through the spraying liquid inlet hole 226 of the liquid inlet branch pipe 22. When the filter cartridge 21 is sprayed, the filter cartridge 21 is cleared and the flocculant and the wastewater are fully mixed; the multiple liquid inlet branches 22 can be opened in full or in part, and can also be opened at the same time or in sequence according to needs;

[0040] S3: During step S2, the power assembly 3 drives the plurality of third branch pipes 224 to rotate in sequence. When the third branch pipe 224 rotates, the cleaning assembly 23 is driven to operate, so as to strengthen the cleaning of the outer surface of the filter cartridge 21 and increase the disturbance around the filter cartridge 21, thereby ensuring the effect of the flocculation process. When a filter cartridge 21 needs to be cleaned, liquid can be injected and sprayed separately or the corresponding cleaning assembly 23 can be operated separately.

[0041] S4: After the flocculation process is completed, the discharge branch pipe 51 connected to the filter cartridge 21 of required height or required pore size is opened to discharge the clear liquid.

[0042] Embodiment 4:

[0043] See also Figure 5The difference between the fourth embodiment and the first embodiment is that a blowing pipe 227 is installed on the outer side of some of the blowing liquid inlet holes 226; the blowing pipe 227 forms an angle of a certain preset angle with the circumferential surface of the third branch pipe 224, that is, the third branch pipe 224 can have a blowing pipe 227 or a blowing liquid inlet hole 226; when there is a blowing pipe 227, the inclination angle of the blowing pipe 227 can be adjusted as needed, and the inclination angles of multiple blowing pipes 227 can be different or the same. The blowing pipe 227 can increase the disturbance stirring effect, thereby increasing the contact area between the flocculant and the wastewater and improving the flocculation effect.

[0044] It should be noted that the "up, down, left, right, inside, and outside" in the present invention are defined based on the relative positions of the components in the figure. This is only for the clarity and convenience of describing the technical solution. It should be understood that the use of these directional words does not constitute a limitation on the scope of protection of this application.

[0045] The embodiments described above are only preferred embodiments and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to 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 should be included in the protection scope of the present invention.

Claims

1. A zero-discharge recycling treatment device for electroplating heavy metal wastewater, characterized in that: It comprises a flocculation unit; the flocculation unit comprises a treatment tank, a filter assembly and a power assembly; the filter assembly is connected with a discharge main pipe of clear liquid and a liquid inlet main pipe of flocculation liquid; the filter assembly comprises a filter cartridge, a liquid inlet branch pipe and a cleaning assembly; a plurality of the filter cartridges are arranged in an array; the filter cartridge comprises a solid pipe section and a mesh section; the solid pipe section is horizontally inserted into the treatment tank and one end extends out of the treatment tank; the mesh section is located in the treatment tank; the end of the solid pipe section extending out of the treatment tank is provided with a discharge branch pipe connected to the discharge main pipe; the liquid inlet branch pipe corresponds to the filter cartridge one by one, and the two are coaxially sleeved; the liquid inlet branch pipe comprises a first branch pipe, a rotating branch pipe, a second branch pipe, a third branch pipe and a solid shaft connected in a straight line; the first branch pipe is connected to the liquid inlet main pipe; the second branch pipe is horizontally inserted into the end face of the solid pipe section; the second branch pipe The circumferential surface located outside the filter cartridge is connected to the power component, and can drive the third branch pipe and the solid shaft to rotate under the action of the power component; a plurality of spray liquid inlet holes are opened on the third branch pipe; the solid shaft is rotatably connected to the end of the mesh section; the cleaning component is connected to the end of the solid shaft passing through the mesh section; when the third branch pipe rotates, the cleaning component automatically cleans the mesh section; the apertures of the mesh sections of the plurality of filter cartridges are the same or gradually decrease from bottom to top; a first liquid inlet valve is provided on the liquid inlet branch pipe, and a second liquid inlet valve is connected to the liquid inlet main pipe; a first discharge valve is provided on the discharge branch pipe, and a second discharge valve is connected to the discharge main pipe; the first liquid inlet valve, the second liquid inlet valve, the first discharge valve, and the second discharge valve are all coupled to the control system, and can be automatically opened and closed under the action of the control system.

2. The zero-discharge and reuse treatment device for electroplating heavy metal wastewater according to claim 1 is characterized in that: The cleaning assembly includes a first gear, a second gear, a brush shaft, and a rotating head; bristles are attached to the circumferential surface of the brush shaft, and the length of the bristles along the axis of the brush shaft is greater than or equal to the length of the mesh section in this direction; the first gear sleeve is installed on a solid shaft; the second gear sleeve is installed at one end of the brush shaft; the first gear and the second gear are meshed with each other; a circular track is provided on the inner wall of the treatment tank and surrounds the filter cartridge; the other end of the brush shaft is slidably connected to the circular track through a rotating head.

3. The zero-discharge and reuse treatment device for electroplating heavy metal wastewater according to claim 2 is characterized in that: One end of the solid shaft is installed on the inner wall of the treatment pool through a rotating base; a rotating ring is sleeved on the solid shaft; a connecting rod is provided on the circumference of the rotating ring; and the connecting rod is installed on the brush shaft.

4. The zero-discharge and reuse treatment device for electroplating heavy metal wastewater according to claim 1 is characterized in that: The treatment pool is provided with a wastewater inlet, a sedimentation outlet, and a pressure-stabilizing gas outlet; the liquid inlet main pipe is connected to the mixing unit; the discharge main pipe is connected to the clear liquid sterilization unit through a first branch or through a second branch; the second branch is connected to the first branch; the second branch is connected to a liquid pump and a third valve.

5. The zero-discharge and reuse treatment device for electroplating heavy metal wastewater according to claim 1 is characterized in that: A blowing pipe is arranged on the outer side of some of the blowing liquid inlet holes; the blowing pipe forms an included angle of a certain preset angle with the circumference of the third branch pipe.

6. The zero-discharge and reuse treatment device for electroplating heavy metal wastewater according to claim 1 is characterized in that: The power assembly includes a third gear, a fourth gear, a power motor and a three-axis linear module; the multiple third gears correspond one-to-one to the multiple liquid inlet branch pipes; the third gear is sleeved on the end of the second branch pipe located outside the filter cylinder; the fourth gear is installed on the rotating shaft of the power motor; the three-axis linear module is adjacent to the side of the treatment tank; the power motor is installed on the three-axis linear module so as to drive the fourth gear to engage with one of the third gears.

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