PCB (Printed Circuit Board) production wastewater heavy metal removal system based on multi-stage electrolysis

Abstract

The invention discloses a PCB production wastewater heavy metal removal system based on multi-stage electrolysis, and relates to the field of wastewater multi-stage treatment.The PCB production wastewater heavy metal removal system comprises a multi-stage electrolysis mechanism, the multi-stage electrolysis mechanism is provided with an auxiliary mechanism, and the auxiliary mechanism comprises two rectangular blocks, a three-way pipe, a detector and an electric push rod; a conveying pipe is installed at the water inlet end of the treatment box, electric adjusting valves are installed at the two water outlet ends of a three-way pipe, a connecting plate is installed at the top of the telescopic end of an electric push rod, an L-shaped rod is fixed to the bottom of the connecting plate, and a probe is fixed to the interior of a round hole in the upper side of the L-shaped rod. According to the multi-stage electrolysis-based PCB production wastewater heavy metal removal system, whether the wastewater subjected to multi-stage electrolysis treatment contains heavy metal or not can be detected, and the treated wastewater containing heavy metal can be treated again, so that the discharged wastewater reaches the discharge standard, and meanwhile, the use efficiency of the multi-stage electrolysis-based PCB production wastewater heavy metal removal system is also improved.

Description

Technical Field

[0001] The invention relates to the field of multi-stage wastewater treatment, and in particular to a system for removing heavy metals from PCB production wastewater based on multi-stage electrolysis. Background Art

[0002] PCB circuit boards, also known as printed circuit boards, are key components of electronic devices. During the production process of PCB circuit boards, a large amount of wastewater is often generated, and these wastewaters contain a variety of heavy metals, such as copper, nickel, lead, zinc, etc., and the concentration is relatively high. At this time, in order to ensure that the discharged wastewater meets the discharge standards, the staff generally use a multi-stage electrolytic removal system to remove heavy metals from the wastewater.

[0003] In the existing technology, the existing PCB circuit board production wastewater heavy metal removal system based on multi-stage electrolysis can perform multi-stage electrolysis treatment on the wastewater during actual use to effectively remove heavy metals in the wastewater, but it does not have the functions of detection and auxiliary treatment. When the multi-stage electrolysis treatment system treats wastewater for a long time, the anode and cathode plates in the multi-stage electrolysis treatment system will undergo different degrees of oxidation and corrosion. At this time, the multi-stage electrolysis treatment system that continues to treat the wastewater and does not have a detection function will not be able to know whether the treated wastewater contains heavy metals, and cannot treat the treated wastewater again when it contains heavy metals, which will cause the discharged wastewater to pollute the environment.

[0004] Therefore, we proposed a new heavy metal removal system for PCB circuit board production wastewater based on multi-stage electrolysis to solve the problems raised in the above background technology. Summary of the invention

[0005] The purpose of the present invention is to provide a PCB circuit board production wastewater heavy metal removal system based on multi-stage electrolysis, so as to solve the problem that the existing PCB circuit board production wastewater heavy metal removal system based on multi-stage electrolysis does not have the detection and auxiliary treatment functions. When the multi-stage electrolysis treatment system performs wastewater treatment for a long time, the positive and negative plates in the multi-stage electrolysis treatment system will undergo oxidation and corrosion to varying degrees. At this time, the multi-stage electrolysis treatment system that continues to treat the wastewater and does not have a detection function will not be able to know whether the treated wastewater contains heavy metals, and cannot process the treated wastewater again when it contains heavy metals, which will cause the discharged wastewater to pollute the environment, that is, it will reduce the use efficiency of the PCB circuit board production wastewater heavy metal removal system based on multi-stage electrolysis.

[0006] To achieve the above object, the present invention provides the following technical solution: a system for removing heavy metals from PCB production wastewater based on multi-stage electrolysis, comprising a multi-stage electrolysis mechanism, wherein an auxiliary mechanism is arranged on the multi-stage electrolysis mechanism;

[0007] The auxiliary mechanism includes two rectangular blocks, a tee, a detector and an electric push rod, connecting blocks are installed on opposite sides of the two rectangular blocks, a processing box is fixed between opposite sides of the two connecting blocks, a box cover is installed on the top of the processing box, a sealing gasket is bonded and connected to the bottom of the box cover, a mesh is fixed to one side of the inner wall of the processing box, a porous plate is fixed inside the processing box, a delivery pipe is installed at the water inlet end of the processing box, electric regulating valves are installed at both water outlet ends of the tee, a connecting plate is installed on the top of the telescopic end of the electric push rod, an L-shaped rod is fixed to the bottom of the connecting plate, and a probe is fixed inside the upper circular hole of the L-shaped rod.

[0008] Preferably, the sealing gasket is movably sleeved inside the top opening of the treatment box, the mesh is located at the water inlet at the water outlet end on one side of the inner wall of the treatment box, the top of the porous plate is in contact with the bottom of the sealing gasket, and the water outlet end of one of the electric regulating valves is installed with the water inlet end of the delivery pipe.

[0009] Preferably, the multi-stage electrolysis mechanism includes a placement rack, three shells are arranged inside the placement rack, the lower side of each shell is in contact with the top of the placement rack, a group of mounting grooves are opened on the top of each shell, and the number of mounting grooves in each group is two, and an insulating block is installed at the bottom of the inner wall of each mounting groove.

[0010] Preferably, a conductive sheet is installed on the top of each insulating block, and a cathode plate is installed on the bottom of one of the conductive sheets in each group, and the top of each cathode plate is movable through the bottom of the corresponding insulating block, and two partitions are fixed inside the placement rack, and the top of the two partitions is in the same horizontal plane with the top of the placement rack, and each partition is located between two adjacent shells.

[0011] Preferably, a placement plate is fixed inside the placement rack, the top of the placement plate and the top of the placement rack are in the same horizontal plane, the placement plate is between one side of the inner wall of the placement rack and the outer wall of one of the shells, and an anode plate is installed at the bottom of each group of another conductive sheet.

[0012] Preferably, the top of each anode plate is movable through the bottom of the corresponding insulating block, each cathode plate and each anode plate are respectively located inside each shell, a controller is installed on the top of the placement plate, an electric valve is installed at the bottom water outlet of each shell, and a filter is installed at the water outlet of each electric valve.

[0013] Preferably, a water inlet pipe is installed at the water outlet end of each filter, three brackets are fixed on the placement rack, a high-frequency switching power supply is installed at the bottom of each bracket, a first water pump is installed at the bottom of the inner wall of each bracket, and the water inlet end of each of the first water pumps is respectively installed with the water outlet end of each water inlet pipe.

[0014] Preferably, the water outlet ends of the two first water pumps are both equipped with water outlet pipes, an intermediate relay is installed on one side of each bracket, an L-shaped pipe is fixedly passed through one side of the inner wall of each shell near the top, and a second water pump is installed on the lower side of the placement plate.

[0015] Preferably, a connecting pipe is installed at the water outlet end of the second water pump, the water outlet end of the connecting pipe is installed with the water inlet end of one of the L-shaped tubes, the water outlet ends of the two water outlet pipes are installed with the water inlet ends of the other two L-shaped tubes respectively, and the two rectangular blocks are fixed on the placement rack.

[0016] Preferably, the water inlet end of the three-way pipe is installed with the water outlet end of another second water pump, the detector is placed on the top of the placement plate, the electric push rod is installed on the top of the placement frame, the probe is located at the top opening of another shell, and a baffle is fixed on the top of the placement plate near the edge.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. The present invention can detect whether the wastewater after multi-stage electrolysis treatment contains heavy metals by setting an auxiliary mechanism, and can re-treat the heavy metals still contained in the treated wastewater, which not only ensures that the discharged wastewater meets the discharge standard, but also improves the use efficiency of the PCB circuit board production wastewater heavy metal removal system based on multi-stage electrolysis. When the wastewater inside the third shell completes the electrolysis operation, the controller, the electric push rod, the connecting plate and the L-shaped rod are directly used to move the probe downward, and then the probe and the detector are used to detect whether the wastewater after electrolysis treatment inside the third shell still contains heavy metal ions.

[0019] 2. When the screen of the detector of the present invention shows that the treated wastewater contains heavy metal ions, the controller, the corresponding electric valve, the first water pump, one of the electric regulating valves, the corresponding water inlet pipe, the delivery pipe and the corresponding filter are used in combination to pump out the wastewater inside the third shell, and in the process of delivery, the small impurities in the wastewater are first filtered and removed, and then transported to the small space composed of the treatment box and the porous plate, and then the porous plate is used in combination to evenly transport the wastewater entering the small space to the large space composed of the treatment box and the porous plate, and then the ion exchange resin particles in the large space are used in combination to adsorb and remove the heavy metal ions still contained in the wastewater, and then the treatment box and the third water pipe are used in combination to transport the treated wastewater away.

[0020] 3. The present invention can perform multi-stage electrolysis treatment on wastewater by setting a multi-stage electrolysis mechanism, that is, ensure that the discharged wastewater meets the discharge standard. When it is necessary to perform multi-stage electrolysis treatment on the wastewater, the second water pump, the controller, the connecting pipe and the corresponding L-shaped pipe are first used to transport the wastewater to the inside of the first shell. Then, the controller, the corresponding high-frequency switching power supply, the corresponding first wire, the corresponding second wire, the corresponding third wire and the corresponding two conductive sheets are used to connect the circuit between the high-frequency switching power supply and the corresponding cathode plate and the corresponding anode plate, so as to electrolyze the wastewater inside the first shell. When the closing time of the high-frequency switching power supply is reached, the controller, the corresponding electric valve, the corresponding filter, the corresponding water inlet pipe, the corresponding first water pump and the corresponding L-shaped pipe are directly used to first extract the wastewater that has been preliminarily treated inside the first shell, filter it, and then transport it to the inside of the second shell.

[0021] 4. In the present invention, when the start-up time of the high-frequency switching power supply corresponding to the second shell is reached, the controller, the corresponding high-frequency switching power supply, the corresponding first wire, the corresponding second wire, the corresponding third wire and the corresponding two conductive sheets are first used to cooperate so as to connect the circuit between the high-frequency switching power supply and the corresponding cathode plate and the corresponding anode plate, so as to further process the wastewater inside the second shell. When the shutdown time of the high-frequency switching power supply is reached, the controller, the corresponding electric valve, the corresponding filter, the corresponding water inlet pipe, the corresponding first water pump and the corresponding L-shaped pipe are directly used to extract the further processed wastewater inside the first shell, filter it and then transport it to the inside of the third shell.

[0022] 5. In the present invention, when the start-up time of the high-frequency switching power supply corresponding to the third shell is reached, the controller, the corresponding high-frequency switching power supply, the corresponding first wire, the corresponding second wire, the corresponding third wire and the corresponding two conductive sheets are first used in cooperation to connect the circuit between the high-frequency switching power supply and the corresponding cathode plate and the corresponding anode plate, so that the waste water inside the third shell can be processed again. When the waste water inside the third shell is not detected to be mixed with heavy metal ions, the controller, the corresponding electric valve, the corresponding first water pump, the corresponding other electric regulating valve, the three-way pipe, the corresponding filter, the corresponding water inlet pipe and the second water pipe are directly used in cooperation to first extract, filter and then transport the waste water inside the third shell. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A three-dimensional diagram of a system for removing heavy metals from PCB production wastewater based on multi-stage electrolysis according to the present invention;

[0024] Figure 2 A three-dimensional diagram from another angle of a system for removing heavy metals from PCB production wastewater based on multi-stage electrolysis according to the present invention;

[0025] Figure 3 A partial three-dimensional diagram of a multi-stage electrolysis mechanism of a system for removing heavy metals from PCB production wastewater based on multi-stage electrolysis according to the present invention;

[0026] Figure 4 A bottom-up perspective view of a system for removing heavy metals from PCB production wastewater based on multi-stage electrolysis according to the present invention;

[0027] Figure 5 This is a schematic diagram of the structure from a top view of a system for removing heavy metals from PCB production wastewater based on multi-stage electrolysis according to the present invention;

[0028] Figure 6 The present invention is a PCB circuit board production wastewater heavy metal removal system based on multi-stage electrolysis Figure 4 The enlarged stereogram at A in the middle;

[0029] Figure 7 A three-dimensional diagram of the auxiliary mechanism of a system for removing heavy metals from PCB production wastewater based on multi-stage electrolysis according to the present invention;

[0030] Figure 8 A partially cutaway stereoscopic diagram of an auxiliary mechanism of a system for removing heavy metals from PCB production wastewater based on multi-stage electrolysis according to the present invention;

[0031] Fig. 9 This is a stereoscopic diagram of an L-shaped rod of a system for removing heavy metals from PCB production wastewater based on multi-stage electrolysis according to the present invention.

[0032] In the figure: 1, multi-stage electrolysis mechanism; 101, placement rack; 102, housing; 103, mounting groove; 104, insulating block; 105, conductive sheet; 106, cathode plate; 107, partition; 108, placement plate; 109, anode plate; 110, controller; 111, electric valve; 112, filter; 113, water inlet pipe; 114, bracket; 115, high-frequency switching power supply; 116, first water pump; 117, water outlet pipe; 118, intermediate relay ; 119, L-shaped tube; 120, second water pump; 121, connecting tube; 2, baffle; 3, auxiliary mechanism; 301, rectangular block; 302, connecting block; 303, processing box; 304, box cover; 305, sealing gasket; 306, mesh; 307, porous plate; 308, delivery pipe; 309, three-way pipe; 310, electric regulating valve; 311, detector; 312, electric push rod; 313, connecting plate; 314, L-shaped rod; 315, probe. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the implementation regulations described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] Example 1: Please refer to Figure 1-Figure 9 As shown, the present invention provides a technical solution: a system for removing heavy metals from PCB production wastewater based on multi-stage electrolysis, comprising a multi-stage electrolysis mechanism 1, on which an auxiliary mechanism 3 is arranged;

[0035] The auxiliary mechanism 3 includes two rectangular blocks 301, a three-way pipe 309, a detector 311 and an electric push rod 312. The two rectangular blocks 301 are each installed with a connecting block 302 on the opposite side. A treatment box 303 is fixed between the two connecting blocks 302 on the opposite sides. A box cover 304 is installed on the top of the treatment box 303. A sealing gasket 305 is bonded and connected to the bottom of the box cover 304. A mesh 306 is fixed to one side of the inner wall of the treatment box 303. A porous plate 307 is fixed inside the treatment box 303. A delivery pipe 308 is installed at the water inlet end of the treatment box 303. Electric regulating valves 310 are installed at both water outlet ends of the three-way pipe 309. A connecting plate 313 is installed on the top of the telescopic end of the electric push rod 312. An L-shaped rod 314 is fixed to the bottom of the connecting plate 313. The inner circular hole of the upper side of the L-shaped rod 314 is A probe 315 is fixed, and the sealing gasket 305 is movably sleeved inside the top opening of the processing box 303. The mesh 306 is located at the water inlet of the water outlet end on one side of the inner wall of the processing box 303. The top of the porous plate 307 is in contact with the bottom of the sealing gasket 305. The water outlet end of one electric regulating valve 310 is installed with the water inlet end of the delivery pipe 308. The multi-stage electrolysis mechanism 1 includes a placement rack 101, and two rectangular blocks 301 are fixed on the placement rack 101. The water inlet end of the three-way pipe 309 is installed with the water outlet end of another second water pump 120. The detector 311 is placed on the top of the placement plate 108, and the electric push rod 312 is installed on the top of the placement rack 101. The probe 315 is located at the top opening of another shell 102, and the controller 110 is installed on the top of the placement plate 108.

[0036] In this embodiment, when the electrolysis operation of the wastewater inside the third shell 102 is completed, the controller 110 will start the electric push rod 312, and the started electric push rod 312 will drive the connecting plate 313 connected thereto to move, and then the moving connecting plate 313 will drive the probe 315 to move with the cooperation of the L-shaped rod 314. At the same time, the detector 311 is turned on. When the detection end of the probe 315 contacts the wastewater inside the third shell 102, the controller 110 will pause the electric push rod 312. At this time, the probe 315 that contacts the wastewater will detect whether the wastewater in the third shell 102 contains heavy metal ions through the cooperation of the detector 311. When the detector 31 1 shows that the treated wastewater contains heavy metal ions, the controller 110 will open the electric valve 111, the first water pump 116 and one of the electric regulating valves 310 directly below the third shell 102. The first water pump 116, which is started at this time, will pump out the wastewater that has been treated again in the third shell 102 in cooperation with the water inlet pipe 113 connected thereto, the corresponding filter 112 and the opened electric valve 111, and filter out small impurities in the wastewater during the transportation process, and then transport it to the space composed of the treatment box 303 and the porous plate 307 (such as Figure 8 As shown, the space here is the small space on the left), and then the wastewater entering the space will pass through the through holes on the porous plate 307 and enter the space composed of the porous plate 307 and the treatment box 303 (as shown in FIG. Figure 8 As shown, the space here is the large space on the right), and then the heavy metal ions in the wastewater will be adsorbed and removed by the ion exchange resin particles (pre-loaded) inside the space, and then the wastewater that has been treated again will be discharged from the water outlet of the treatment box 303, enter the interior of the third water pipe, and then be transported away. That is, before the treated wastewater is discharged, the wastewater that is detected to still contain heavy metal ions can be treated again.

[0037] Embodiment 2: According to Figure 1-Figure 8As shown, the multi-stage electrolysis mechanism 1 includes a placement rack 101, and three shells 102 are arranged inside the placement rack 101. The lower side of each shell 102 is in contact with the top of the placement rack 101. A group of mounting grooves 103 are opened on the top of each shell 102, and the number of mounting grooves 103 in each group is two. An insulating block 104 is installed at the bottom of the inner wall of each mounting groove 103, and a conductive sheet 105 is installed on the top of each insulating block 104. A cathode plate 106 is installed at the bottom of one of the conductive sheets 105 in each group, and the top of each cathode plate 106 is movably penetrated through the bottom of the corresponding insulating block 104. Two partitions 107 are fixed inside the placement rack 101. The tops of the two partitions 107 are in the same horizontal plane as the tops of the placement racks 101, and each partition 107 is located between two adjacent shells 102. A placement plate 108 is fixed inside the placement rack 101, and the top of the placement plate 108 is in the same horizontal plane as the top of the placement rack 101. The placement plate 108 is located between one side of the inner wall of the placement rack 101 and the outer wall of one of the shells 102. An anode plate 109 is installed at the bottom of each group of another conductive sheet 105, and the top of each anode plate 109 is respectively movable through the bottom of the corresponding insulating block 104. Each cathode plate 106 and each anode plate 109 are respectively located inside each shell 102, and the placement plate 109 is located between one side of the inner wall of the placement rack 101 and the outer wall of one of the shells 102. A controller 110 is installed on the top of the housing 101, an electric valve 111 is installed at the bottom water outlet of each housing 102, a filter 112 is installed at the water outlet of each electric valve 111, and a water inlet pipe 113 is installed at the water outlet of each filter 112. Three brackets 114 are fixed on the placement rack 101, and a high-frequency switching power supply 115 is installed at the bottom of each bracket 114. A first water pump 116 is installed at the bottom of the inner wall of each bracket 114, and the water inlet end of each first water pump 116 is installed with the water outlet end of each water inlet pipe 113, wherein the water outlet ends of two first water pumps 116 are installed with water outlet pipes 117, and one side of each bracket 114 is installed with a middle Relay 118, an L-shaped tube 119 is fixedly passed through one side of the inner wall of each shell 102 near the top, a second water pump 120 is installed on the lower side of the placement plate 108, a connecting tube 121 is installed at the water outlet end of the second water pump 120, the water outlet end of the connecting tube 121 is installed with the water inlet end of one of the L-shaped tubes 119, the water outlet ends of the two water outlet pipes 117 are respectively installed with the water inlet ends of the other two L-shaped tubes 119, a baffle 2 is fixed near the edge of the top of the placement plate 108, the auxiliary mechanism 3 includes two rectangular blocks 301, a three-way pipe 309, a detector 311 and an electric push rod 312, and electric regulating valves 310 are installed at both water outlet ends of the three-way pipe 309.

[0038] In this embodiment, when it is necessary to treat the wastewater generated in the production process of the PCB circuit board, the controller 110 is first used to start the second water pump 120. At this time, starting the second water pump 120 will cooperate with the first water pipe connected thereto to transport the wastewater to the inside of the connecting pipe 121, then transport it to the inside of the corresponding L-shaped pipe 119, and then transport it to the inside of the first shell 102. When an appropriate amount of wastewater is injected into the inside of the first shell 102, the controller 110 is used to turn off the second water pump 120, stop injecting wastewater into the inside of the first shell 102, and then use the controller 110 to start the corresponding intermediate relay 118 (corresponding to the first shell 102) and the corresponding high-frequency switching power supply 115 (corresponding to the first shell 102). Shell 102), when the intermediate relay 118 is energized, the normally open contact of the intermediate relay 118 is closed, and the corresponding high-frequency switching power supply 115 cooperates with the corresponding first wire, the corresponding second wire, the corresponding third wire and the corresponding two conductive sheets 105, and the circuit between the corresponding cathode plate 106 and the corresponding anode plate 109 is connected. At this time, the wastewater in the first shell 102 can be electrolyzed. When the shutdown time of the high-frequency switching power supply 115 is reached, the controller 110 will turn off the high-frequency switching power supply 115 and the intermediate relay 118, and then open the electric valve 111 and the first water pump 116 directly below the first shell 102. At this time, the started first water pump 116 will be connected to it. With the cooperation of the connected water inlet pipe 113, the corresponding filter 112 and the opened electric valve 111, the wastewater that has been preliminarily treated in the first shell 102 is pumped out, and small impurities in the wastewater are filtered out during the transportation process, and then the wastewater is transported to the inside of the second shell 102 through the cooperation of the corresponding water outlet pipe 117 and the corresponding L-shaped tube 119. When there is no wastewater discharged from the water outlet end of the corresponding L-shaped tube 119 on the second shell 102, the controller 110 will turn off the first water pump 116 and the electric valve 111 (the first water pump 116 and the electric valve 111 directly below the first shell 102). When the start-up time of the high-frequency switching power supply 115 corresponding to the second shell 102 arrives, the controller 110 will start the The corresponding high-frequency switching power supply 115 and the corresponding intermediate relay 118, when the intermediate relay 118 is energized, the normally open contact of the intermediate relay 118 is closed, and the corresponding high-frequency switching power supply 115 cooperates with the corresponding first wire, the corresponding second wire, the corresponding third wire and the corresponding two conductive sheets 105, and the circuit between the corresponding cathode plate 106 and the corresponding anode plate 109 is connected. At this time, the wastewater inside the second shell 102 can be electrolyzed. When the shutdown time of the high-frequency switching power supply 115 is reached, the controller 110 will turn off the high-frequency switching power supply 115 and the intermediate relay 118, and then open the electric valve 111 and the first water pump 116 directly below the second shell 102.At this time, the started first water pump 116 will, with the cooperation of the connected water inlet pipe 113, the corresponding filter 112 and the opened electric valve 111, pump out the further treated wastewater in the second shell 102, and filter out small impurities in the wastewater during the transportation process, and then transport it to the inside of the third shell 102 through the cooperation of the corresponding water outlet pipe 117 and the corresponding L-shaped tube 119. When there is no wastewater discharged from the outlet end of the corresponding L-shaped tube 119 on the third shell 102, the controller 110 will turn off the first water pump 116 and the electric valve 111 (the first water pump 116 and the electric valve 111 directly below the second shell 102). When the start time of the high-frequency switching power supply 115 corresponding to the third shell 102 arrives, the controller 110 will start the corresponding high-frequency switching power supply 115 and the corresponding intermediate relay 118. When the intermediate relay 118 is energized, the normally open contact of the intermediate relay 118 is closed, and the corresponding high-frequency switching power supply 115 will pass through the corresponding first wire, the corresponding second wire, and the corresponding third wire. The wire cooperates with the corresponding two conductive sheets 105, and the circuit between the corresponding cathode plate 106 and the corresponding anode plate 109 is connected. At this time, the wastewater in the third shell 102 can be electrolyzed. When the shutdown time of the high-frequency switching power supply 115 arrives, the controller 110 will turn off the high-frequency switching power supply 115 and the intermediate relay 118. When the wastewater in the third shell 102 is not detected to be mixed with heavy metal ions, the controller 110 will open the electric valve 111, the first water pump 116 and the other electric regulating valve 310 directly below the third shell 102. At this time, the started first water pump 116 will, in cooperation with the connected water inlet pipe 113, the corresponding filter 112 and the opened electric valve 111, pump out the wastewater that has been treated again in the third shell 102, and filter out small impurities in the wastewater during the transportation process, and then transport it away through the cooperation of the three-way pipe 309, the opened another electric regulating valve 310 and the second water pipe. That is, through the multi-stage electrolysis operation, the discharged wastewater can meet the discharge standard. ,

[0039] The effect and working principle of the whole mechanism are as follows: when it is necessary to treat the wastewater generated in the production process of PCB circuit boards, all high-frequency switching power supplies 115 and controllers 110 are first connected to the external power supply, and then the outlet end of the prepared first water pipe is connected to the inlet end of the second water pump 120, and the inlet end of the prepared second water pipe is connected to the outlet end of another electric regulating valve 310, and the inlet end of the prepared third water pipe is connected to the outlet end of the treatment box 303, and then the controller 110 is turned on, and the voltage, current and start-up and closing time of each high-frequency switching power supply 115 are set. When everything is ready, the second water pump 120 is started by the controller 110. At this time, the second water pump 120 is started to cooperate with the first water pipe connected thereto to transport the wastewater to the inside of the connecting pipe 121, and then to the inside of the corresponding L-shaped pipe 119, and then to the inside of the first shell 102. When an appropriate amount of wastewater is injected into the inside of the first shell 102, the second water pump 120 is turned off by the controller 110 to stop injecting wastewater into the inside of the first shell 102. Then, the corresponding intermediate relay 118 (corresponding to the first shell 102) and the corresponding high-frequency switching power supply 115 (corresponding to the first shell 102) are started by the controller 110. When the intermediate relay 118 is energized, the normally open contact of the intermediate relay 118 is closed, and the corresponding high-frequency switching power supply 115 is turned on. Through the cooperation of the corresponding first wire, the corresponding second wire, the corresponding third wire and the corresponding two conductive sheets 105, the circuit between the corresponding cathode plate 106 and the corresponding anode plate 109 is connected, and the wastewater in the first shell 102 can be electrolyzed. When the shutdown time of the high-frequency switching power supply 115 is reached, the controller 110 will turn off the high-frequency switching power supply 115 and the intermediate relay 118, and then open the electric valve 111 and the first water pump 116 directly below the first shell 102. At this time, the started first water pump 116 will pump out the preliminarily treated wastewater in the first shell 102 with the cooperation of the water inlet pipe 113 connected thereto, the corresponding filter 112 and the opened electric valve 111. , and in the process of transportation, small impurities in the wastewater are filtered out, and then transported to the inside of the second shell 102 through the cooperation of the corresponding outlet pipe 117 and the corresponding L-shaped pipe 119. When there is no wastewater discharged from the outlet end of the corresponding L-shaped pipe 119 on the second shell 102, the controller 110 will turn off the first water pump 116 and the electric valve 111 (the first water pump 116 and the electric valve 111 directly below the first shell 102). When the start time of the high-frequency switching power supply 115 corresponding to the second shell 102 arrives, the controller 110 will start the corresponding high-frequency switching power supply 115 and the corresponding intermediate relay 118. When the intermediate relay 118 is energized, the normally open contact of the intermediate relay 118 is closed.At this time, the corresponding high-frequency switching power supply 115 will cooperate with the corresponding first wire, the corresponding second wire, the corresponding third wire and the corresponding two conductive sheets 105, and the circuit between the corresponding cathode plate 106 and the corresponding anode plate 109 will be connected. At this time, the wastewater inside the second shell 102 can be electrolyzed. When the shutdown time of the high-frequency switching power supply 115 is reached, the controller 110 will turn off the high-frequency switching power supply 115 and the intermediate relay 118, and then open the electric valve 111 and the first water pump 116 directly below the second shell 102. At this time, the started first water pump 116 will, in cooperation with the water inlet pipe 113 connected thereto, the corresponding filter 112 and the opened electric valve 111, pump the wastewater into the second shell 102. The further treated wastewater in 102 is pumped away, and small impurities in the wastewater are filtered out during the transportation process, and then transported to the inside of the third shell 102 through the cooperation of the corresponding outlet pipe 117 and the corresponding L-shaped pipe 119. When there is no wastewater discharged from the outlet end of the corresponding L-shaped pipe 119 on the third shell 102, the controller 110 will turn off the first water pump 116 and the electric valve 111 (the first water pump 116 and the electric valve 111 directly below the second shell 102). When the start time of the high-frequency switching power supply 115 corresponding to the third shell 102 arrives, the controller 110 will start the corresponding high-frequency switching power supply 115 and the corresponding intermediate relay 118. When the intermediate relay 118 is energized, the intermediate relay 118 will start. The normally open contact of the intermediate relay 118 is closed, and the corresponding high-frequency switching power supply 115 cooperates with the corresponding first wire, the corresponding second wire, the corresponding third wire and the corresponding two conductive sheets 105, and the circuit between the corresponding cathode plate 106 and the corresponding anode plate 109 is connected. At this time, the wastewater in the third shell 102 can be electrolyzed. When the closing time of the high-frequency switching power supply 115 is reached, the controller 110 will turn off the high-frequency switching power supply 115 and the intermediate relay 118, and then start the electric push rod 312. At this time, the started electric push rod 312 will drive the connecting plate 313 connected thereto to move, and then the moving connecting plate 313 will drive the probe 315 with the cooperation of the L-shaped rod 314. Move, at the same time, turn on the detector 311, when the detection end of the probe 315 contacts the wastewater inside the third shell 102, the controller 110 will pause the electric push rod 312, and the probe 315 contacting the wastewater will detect whether the wastewater in the third shell 102 contains heavy metal ions through the cooperation of the detector 311. When the screen of the detector 311 does not show that the treated wastewater contains heavy metal ions, the controller 110 will open the electric valve 111 and the first water pump 116 and another electric regulating valve 310 directly below the third shell 102. At this time, the started first water pump 116 will cooperate with the water inlet pipe 113 connected thereto, the corresponding filter 112 and the opened electric valve 111.The wastewater treated again in the third shell 102 is pumped out, and small impurities in the wastewater are filtered out during the transportation process, and then it is transported away through the cooperation of the three-way pipe 309, another opened electric regulating valve 310 and the second water pipe. When the screen of the detector 311 shows that the treated wastewater contains heavy metal ions, the controller 110 will open the electric valve 111, the first water pump 116 and one of the electric regulating valves 310 directly below the third shell 102. At this time, the started first water pump 116 will, in cooperation with the connected water inlet pipe 113, the corresponding filter 112 and the opened electric valve 111, pump out the wastewater treated again in the third shell 102, and small impurities in the wastewater are filtered out during the transportation process, and then it is transported to the space composed of the treatment box 303 and the porous plate 307 (such as, Figure 8 As shown, the space here is the small space on the left), and then the wastewater entering the space will pass through the through holes on the porous plate 307 and enter the space composed of the porous plate 307 and the treatment box 303 (as shown in FIG. Figure 8 As shown, the space here is the large space on the right), and then the heavy metal ions in the wastewater will be adsorbed and removed by the ion exchange resin particles (pre-loaded) inside the space, and then the wastewater that has been treated again will be discharged from the water outlet of the treatment box 303, enter the interior of the third water pipe, and then be transported away.

[0040] Among them, each intermediate relay 118 is connected to each conductive plate 105 (corresponding to the anode plate 109) through a first wire, each intermediate relay 118 is connected to each high-frequency switching power supply 115 through a second wire, each high-frequency switching power supply 115 is connected to each conductive plate 105 (corresponding to the cathode plate 106) through a third wire, and each intermediate relay 118, each high-frequency switching power supply 115, each electric valve 111, each first water pump 116, the second water pump 120, each electric regulating valve 310 and the electric push rod 312 are electrically connected to the controller 110.

[0041] Among them, Figure 8 As shown, the steps for filling the large space on the right with ion exchange resin particles are as follows: first, remove the box cover 304, then use the box cover 304 to pull out the sealing gasket 305 from the top opening of the processing box 303, and then directly inject an appropriate amount of ion exchange resin particles into the large space through the top opening of the processing box 303, and then restore the box cover 304 and the sealing gasket 305 to their original positions.

[0042] Among them, Figure 1 As shown, the three shells 102 are respectively one of the shells 102 , a middle shell 102 and another shell 102 .

[0043] Among them, the conductive sheet 105, the cathode plate 106, the anode plate 109, the controller 110 (PLC controller), the electric valve 111, the filter 112 (composed of a processing shell, a shell cover and a filter screen), the high-frequency switching power supply 115, the first water pump 116, the intermediate relay 118, the second water pump 120, the electric regulating valve 310, the detector 311, the electric push rod 312 and the probe 315 are all existing technologies, and their models can be selected according to actual conditions, and no excessive explanation is given here.

[0044] 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 make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, 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 system for removing heavy metals from PCB production wastewater based on multi-stage electrolysis, characterized in that: It comprises a multi-stage electrolysis mechanism (1), wherein an auxiliary mechanism (3) is arranged on the multi-stage electrolysis mechanism (1); The auxiliary mechanism (3) comprises two rectangular blocks (301), a three-way pipe (309), a detector (311) and an electric push rod (312); a connecting block (302) is installed on opposite sides of the two rectangular blocks (301); a processing box (303) is fixed between opposite sides of the two connecting blocks (302); a box cover (304) is installed on the top of the processing box (303); a sealing gasket (305) is bonded to the bottom of the box cover (304); and an inner wall of the processing box (303) is provided with a sealing gasket (305). A mesh sheet (306) is fixed on the side, a porous plate (307) is fixed inside the treatment box (303), a delivery pipe (308) is installed at the water inlet end of the treatment box (303), both water outlet ends of the three-way pipe (309) are installed with electric regulating valves (310), a connecting plate (313) is installed on the top of the telescopic end of the electric push rod (312), an L-shaped rod (314) is fixed at the bottom of the connecting plate (313), and a probe (315) is fixed inside the upper circular hole of the L-shaped rod (314).

2. The system for removing heavy metals from PCB production wastewater based on multi-stage electrolysis according to claim 1 is characterized in that: The sealing gasket (305) is movably sleeved inside the top opening of the treatment box (303), the mesh (306) is located at the water inlet at the water outlet end of the inner wall of the treatment box (303), the top of the porous plate (307) is in contact with the bottom of the sealing gasket (305), and the water outlet end of one of the electric regulating valves (310) is installed with the water inlet end of the delivery pipe (308).

3. The system for removing heavy metals from PCB production wastewater based on multi-stage electrolysis according to claim 2 is characterized in that: The multi-stage electrolysis mechanism (1) comprises a placement rack (101), three shells (102) are arranged inside the placement rack (101), the lower side of each shell (102) is in contact with the top of the placement rack (101), a group of installation grooves (103) are opened on the top of each shell (102), and the number of each group of installation grooves (103) is two, and an insulating block (104) is installed at the bottom of the inner wall of each installation groove (103).

4. The system for removing heavy metals from PCB production wastewater based on multi-stage electrolysis according to claim 3 is characterized by: A conductive sheet (105) is installed on the top of each insulating block (104), a cathode plate (106) is installed on the bottom of one of the conductive sheets (105) in each group, the top of each cathode plate (106) movably passes through the bottom of the corresponding insulating block (104), two partitions (107) are fixed inside the placement rack (101), and the tops of the two partitions (107) are on the same horizontal plane as the top of the placement rack (101), and each partition (107) is located between two adjacent shells (102).

5. The system for removing heavy metals from PCB production wastewater based on multi-stage electrolysis according to claim 4 is characterized in that: A placement plate (108) is fixed inside the placement rack (101), the top of the placement plate (108) and the top of the placement rack (101) are in the same horizontal plane, the placement plate (108) is between one side of the inner wall of the placement rack (101) and the outer wall of one of the shells (102), and an anode plate (109) is installed at the bottom of each group of another conductive sheet (105).

6. The system for removing heavy metals from PCB production wastewater based on multi-stage electrolysis according to claim 5 is characterized by: The top of each anode plate (109) is movable through the bottom of the corresponding insulating block (104), each cathode plate (106) and each anode plate (109) are respectively located inside each shell (102), a controller (110) is installed on the top of the placement plate (108), an electric valve (111) is installed at the bottom water outlet of each shell (102), and a filter (112) is installed at the water outlet of each electric valve (111).

7. The system for removing heavy metals from PCB production wastewater based on multi-stage electrolysis according to claim 6 is characterized by: A water inlet pipe (113) is installed at the water outlet end of each filter (112); three brackets (114) are fixed on the placement rack (101); a high-frequency switching power supply (115) is installed at the bottom of each bracket (114); a first water pump (116) is installed at the bottom of the inner wall of each bracket (114); and the water inlet end of each first water pump (116) is respectively installed with the water outlet end of each water inlet pipe (113).

8. The system for removing heavy metals from PCB production wastewater based on multi-stage electrolysis according to claim 7 is characterized in that: The water outlet ends of the two first water pumps (116) are both installed with water outlet pipes (117), one side of each bracket (114) is installed with an intermediate relay (118), one side of the inner wall of each housing (102) near the top is fixed with an L-shaped pipe (119) passing through, and the lower side of the placement plate (108) is installed with a second water pump (120).

9. The system for removing heavy metals from PCB production wastewater based on multi-stage electrolysis according to claim 8, characterized in that: A connecting pipe (121) is installed at the water outlet end of the second water pump (120), the water outlet end of the connecting pipe (121) is installed with the water inlet end of one of the L-shaped tubes (119), the water outlet ends of the two water outlet pipes (117) are installed with the water inlet ends of the other two L-shaped tubes (119) respectively, and the two rectangular blocks (301) are fixed on the placement frame (101).

10. The system for removing heavy metals from PCB production wastewater based on multi-stage electrolysis according to claim 8, characterized in that: The water inlet end of the three-way pipe (309) is installed with the water outlet end of another second water pump (120), the detector (311) is placed on the top of the placement plate (108), the electric push rod (312) is installed on the top of the placement frame (101), the probe (315) is located at the top opening of another shell (102), and a baffle (2) is fixed on the top of the placement plate (108) near the edge.

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