A PCB production process waste liquid treatment device and treatment method

Abstract

The application discloses a waste liquid treatment device and treatment method in a PCB production process, which comprises a sedimentation bin, a transition bin, a stirring bin and an inlet and outlet bin, a partition is arranged at the middle position in the interior of the inlet and outlet bin, a drainage funnel is arranged at one side of the bottom of the interior of the inlet and outlet bin, a mounting frame is arranged at the top of the inlet and outlet bin, and a filter assembly is arranged at the bottom of the mounting frame. The third servo motor drives the screw rod to rotate clockwise, the piston is separated from the interior of the blowdown pipe, and the accumulated sediments in the interior of the blowdown funnel gradually enter the interior of the waste discharge pipe. If the blowdown pipe is blocked, the third servo motor drives the screw rod to rotate counterclockwise, the piston is re-inserted into the interior of the blowdown pipe, and the blocked sediments in the interior of the blowdown pipe are pushed into the interior of the waste discharge pipe. Therefore, the sediments in the interior of the blowdown funnel can enter the waste discharge pipe, and the blocked position does not need to be manually cleaned.

Description

Technical Field

[0001] This invention relates to the field of electronic technology, specifically to a waste liquid treatment device and method in PCB manufacturing. Background Technology

[0002] During PCB manufacturing, etching and other operations generate a large amount of waste liquid. If this waste liquid is not treated, and it contains a large amount of heavy metals and other substances, it will cause great damage to the environment. Therefore, it is necessary to use appropriate waste liquid treatment equipment to treat this waste liquid in a reasonable manner.

[0003] Currently, the waste liquid generated during PCB production often fails to ensure thorough mixing with the corresponding oxidizing or reducing agents. This results in some harmful substances in the waste liquid not being completely converted into harmless substances or easily precipitated substances, thus failing to remove most of the harmful substances from the waste liquid. Furthermore, the current waste liquid sedimentation process requires operators to regularly clean the sediment at the bottom of the sedimentation tank, which affects the overall efficiency of the waste liquid treatment equipment and increases the labor intensity of the operators. At the same time, when cleaning sediment in the current waste liquid treatment equipment, excessive sediment may cause blockage of the drain outlet at the bottom of the sedimentation tank, which greatly affects the effect of the equipment in discharging sediment. Summary of the Invention

[0004] The purpose of this invention is to provide a waste liquid treatment device and method in the PCB manufacturing process to solve the related problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a waste liquid treatment device for PCB manufacturing, comprising a sedimentation tank, a transition tank, a stirring tank, and an inlet / outlet tank. A partition is installed in the middle of the inlet / outlet tank. A drainage funnel is provided on one side of the bottom of the inlet / outlet tank. A mounting frame is installed on the top of the inlet / outlet tank, and a filter assembly is provided at the bottom of the mounting frame. A feed funnel is installed on the side of the mounting frame closest to the stirring tank. Mounting plates are symmetrically installed at both ends inside the stirring tank, and a rotating shaft is provided on both sets of mounting plates close to each other at one end. A spiral stirring paddle is installed on the outside. The bottom of the two sets of mounting plates are symmetrically provided with strip-shaped through holes. A first servo motor is installed at one end of the sedimentation tank and the stirring tank that are close to each other. A connecting shaft is installed at the output end of the first servo motor. A transmission device is provided at the same end of the connecting shaft and the rotating shaft. A sewage discharge component is provided at the bottom of the sedimentation tank. A waste discharge component is provided at the top of the sedimentation tank. A water outlet is provided at the end of the sedimentation tank that is close to the drainage funnel. Support legs are symmetrically installed on both sides of the bottom of the transition tank and the inlet and outlet tank. A control panel is installed at the end of the stirring tank that is away from the sedimentation tank.

[0006] Preferably, the filter assembly includes a drive device, a second cylindrical frame, a first cylindrical frame, a rotating rod, a first filter screen, and a second filter screen. Rotating rods are symmetrically arranged on both sides of the bottom of the mounting frame. A first cylindrical frame is mounted on the bottom end of one set of rotating rods, and a second cylindrical frame that cooperates with the drainage funnel is mounted on the bottom end of the other set of rotating rods. The second cylindrical frame has a second filter screen mounted on its outer side and bottom. The second cylindrical frame is located at the top inside the drainage funnel. The first cylindrical frame has a first filter screen mounted on its outer side and bottom. A drive device is provided at the top of the mounting frame and is pulsatorically connected to the top ends of the two sets of rotating rods.

[0007] Preferably, the waste discharge assembly includes a U-shaped bin, a third servo motor, a U-shaped frame, a connecting plate, a lead screw, movable rods, and a piston. The top of the sedimentation bin is equipped with a U-shaped bin, and a U-shaped frame is installed at the middle position of the top of the U-shaped bin. The third servo motor is installed at the middle position of the top of the U-shaped frame. A lead screw is installed at the output end of the third servo motor, and a connecting plate is provided on the outer thread of the lead screw. Four sets of movable rods are evenly installed at the bottom of the connecting plate, and the bottom ends of the four sets of movable rods extend into the interior of the sedimentation bin and are equipped with pistons.

[0008] Preferably, the sewage discharge assembly includes a sewage discharge funnel, a sewage discharge pipe, a second servo motor, a waste discharge pipe, and a spiral conveyor. Four sets of sewage discharge funnels are evenly arranged at the bottom of the sedimentation chamber. A sewage discharge pipe is installed at the bottom of each sewage discharge funnel. A waste discharge pipe is installed on the inner side of two sets of support legs on the same side. A spiral conveyor is installed inside the waste discharge pipe. A second servo motor that is connected to the spiral conveyor is installed at the end of the waste discharge pipe away from the transition chamber. A sewage discharge port is installed at the bottom of the waste discharge pipe away from the inlet and outlet chambers.

[0009] Preferably, the driving device includes a drive motor, a first pulley and a first transmission belt. The top ends of the two sets of rotating rods extend to the top of the mounting frame and are equipped with first pulleys. The outer sides of the two sets of first pulleys are jointly provided with a first transmission belt. A drive motor that is connected to a set of rotating rods is installed on one side of the top of the mounting frame.

[0010] Preferably, four sets of auxiliary plates are evenly installed at the bottom of the U-shaped compartment, and the four sets of movable rods pass through the middle position of the corresponding set of auxiliary plates. Sliding rods are symmetrically installed at the middle positions of both ends of the top of the U-shaped compartment, and the tops of the two sets of sliding rods pass through the connecting plate and extend to the top of the connecting plate.

[0011] Preferably, six sets of stirring blades are evenly installed on the outer side of the connecting shaft, and stirring rods are evenly installed on the outer side of the rotating shaft.

[0012] Preferably, the transmission device includes a second pulley and a second transmission belt. The ends of the connecting shaft and the rotating shaft away from the inlet and outlet hoppers extend to the outside of the transition hopper and are both equipped with second pulleys. The outer sides of the two sets of second pulleys are jointly provided with a second transmission belt.

[0013] Preferably, a three-way connector connected to the bottom of the drainage funnel is installed on one side of the bottom of the inlet and outlet hopper. Both output ends of the three-way connector are equipped with valves, and the output end of one set of valves is connected to the top of the waste discharge pipe near the inlet and outlet hopper.

[0014] Preferably, a method for treating waste liquid during PCB manufacturing includes the following steps:

[0015] First, while continuously pouring the waste liquid into the feed funnel, the corresponding amount of chemical reagent is also continuously poured into the first cylindrical frame. The control panel controls the drive device to drive the rotating rod and the first cylindrical frame to rotate at a uniform speed, so that the waste liquid and chemical reagent mix with each other and gradually form precipitate.

[0016] Second, control the first servo motor to drive the connecting shaft to rotate. The connecting shaft drives the spiral stirring paddle and the rotating shaft to rotate through the transmission device, thereby stirring the mixture inside the stirring chamber. The stirred mixture then enters the transition chamber.

[0017] 3. During the process of the mixed liquid entering the sedimentation tank, the sediment in the mixed liquid gradually sinks into the four sets of sewage discharge funnels. Then, the waste liquid that separates the sediment gradually flows into the drainage funnel through the outlet. The rotating second filter screen filters the waste liquid again. Finally, the treated waste liquid enters the three-way connector from the bottom of the drainage funnel.

[0018] Fourth, open a set of valves away from the second servo motor to discharge the treated waste liquid. Clean the first and second filters regularly.

[0019] Compared with the prior art, the present invention provides a waste liquid treatment device and method in PCB manufacturing process, which has the following beneficial effects:

[0020] 1. In this invention, while continuously pouring waste liquid into the feed funnel, corresponding chemical agents are also continuously poured into the first cylindrical frame. The drive device is controlled to drive the rotating rod and the first cylindrical frame to rotate at a uniform speed, allowing the waste liquid and chemical agents to mix. The mixture then flows into the mixing chamber through a set of strip-shaped through holes. The first filter screen on the first cylindrical frame can filter out larger impurities in the waste liquid. Then, the first servo motor is controlled to drive the connecting shaft to rotate. The connecting shaft drives the spiral stirring paddle and the rotating shaft to rotate through the transmission device, thereby stirring the mixture inside the mixing chamber, improving the mixing effect of the waste liquid and chemical agents, and allowing most of the harmful substances in the waste liquid to quickly form precipitates, which can greatly improve the overall treatment effect of the waste liquid of the device.

[0021] 2. In this invention, after the mixture is stirred, it flows through the transition chamber and then into the sedimentation chamber. The sediment gradually settles to the bottom of the sedimentation chamber and then falls into four sets of discharge funnels. When the sediment in the discharge funnels reaches a certain thickness, the second servo motor drives the screw conveyor to rotate. The sediment at the bottom of the discharge funnel enters the waste discharge pipe through the discharge pipe and is gradually pushed by the screw conveyor to the discharge port of the waste discharge pipe, thus being discharged into the external environment. The appropriate collection bins are placed in the container, and the collected sediment is periodically processed centrally. The mixed liquid after the sediment is separated enters one side of the inlet and outlet bins through the outlet and then enters the rotating second cylindrical frame. The liquid is filtered again by the second filter screen, and the finally treated waste liquid is discharged from the bottom of the drain funnel. The whole process does not require operators to manually clean the sediment at the bottom of the sedimentation bins, nor does it require the entire device to stop treating the waste liquid. This reduces the labor intensity of the operators and ensures that the device can continuously treat the waste liquid.

[0022] 3. When a large amount of sediment accumulates inside the sewage funnel, this invention controls the third servo motor to drive the lead screw to rotate clockwise. The screw thread forces the connecting plate, along with four sets of movable rods, to rise together. The piston moves away from the inside of the sewage pipe, opening the bottom of the sewage funnel. This allows the sediment accumulated inside the funnel to gradually pass through the sewage pipe and enter the waste discharge pipe. If the sewage pipe becomes blocked, the third servo motor can be controlled to drive the lead screw to rotate counterclockwise, causing the piston to re-engage inside the sewage pipe and push the sediment blocking the sewage pipe into the waste discharge pipe. Then, the piston is controlled to rise again. This ensures that all the sediment inside the sewage funnel can enter the waste discharge pipe, eliminating the need for manual cleaning of blocked areas, reducing labor intensity, and guaranteeing that all sediment in the device can be discharged. Attached Figure Description

[0023] Figure 1This is a top view of the present invention;

[0024] Figure 2 This is a top sectional view of the present invention;

[0025] Figure 3 This is a top view of the sedimentation tank, transition tank, mixing tank, and inlet / outlet tank of the present invention.

[0026] Figure 4 This is a partial front sectional view of the sedimentation tank of the present invention;

[0027] Figure 5 This is a partial front sectional view of the waste discharge assembly of the present invention;

[0028] Figure 6 This is a three-dimensional schematic diagram of the mounting plate of the present invention;

[0029] Figure 7 This is a three-dimensional schematic diagram of the first cylindrical frame and the second cylindrical frame of the present invention.

[0030] In the diagram: 1. Filter assembly; 101. Drive unit; 102. Second cylindrical frame; 103. First cylindrical frame; 104. Rotating rod; 105. First filter screen; 106. Second filter screen; 2. Waste discharge assembly; 201. U-shaped bin; 202. Third servo motor; 203. U-shaped frame; 204. Connecting plate; 205. Lead screw; 206. Movable rod; 207. Piston; 3. Sedimentation bin; 4. Stirring blade; 5. Connecting shaft; 6. Transmission device; 7. Transition bin; 8. First servo motor 9. Motor; 10. Spiral agitator; 11. Rotating shaft; 12. Mixing chamber; 13. Mounting plate; 14. Feed hopper; 15. Sewage discharge hopper; 16. Auxiliary plate; 17. Mixing rod; 18. Control panel; 19. Partition plate; 20. Mounting bracket; 21. Drainage funnel; 22. Sewage discharge pipe; 23. Strip-shaped through hole; 24. Inlet and outlet hoppers; 25. Water outlet; 26. T-joint; 27. Valve; 28. Second servo motor; 29. ​​Waste discharge pipe; 30. Spiral conveyor; 31. Support leg. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] Please see Figure 1-7This invention provides a technical solution: a waste liquid treatment device for PCB manufacturing, comprising a sedimentation tank 3, a transition tank 7, a stirring tank 11, and an inlet / outlet tank 23. A partition 18 is installed in the middle of the inlet / outlet tank 23. A drainage funnel 20 is provided on one side of the bottom of the inlet / outlet tank 23. A mounting frame 19 is installed on the top of the inlet / outlet tank 23, and a filter assembly 1 is provided at the bottom of the mounting frame 19. A feed funnel 13 is installed on the side of the mounting frame 19 closest to the stirring tank 11. Mounting plates 12 are symmetrically installed at both ends inside the stirring tank 11, and a rotating shaft 10 is provided on both sets of mounting plates 12 close to each other at one end. Spiral agitators 9 are installed on the outside of the sedimentation tank 3. The bottom of the two sets of mounting plates 12 are symmetrically provided with strip-shaped through holes 22. The sedimentation tank 3 and the agitation tank 11 are respectively installed at one end close to each other. The output end of the first servo motor 8 is provided with a connecting shaft 5. The connecting shaft 5 and the rotating shaft 10 are provided with a transmission device 6 at the same end. The bottom of the sedimentation tank 3 is provided with a sewage discharge component. The top of the sedimentation tank 3 is provided with a waste discharge component 2. The end of the sedimentation tank 3 near the drainage funnel 20 is provided with a water outlet 24. The bottom sides of the transition tank 7 and the inlet / outlet tank 23 are symmetrically provided with support legs 30. The agitation tank 11 is provided with a control panel 17 at the end away from the sedimentation tank 3.

[0033] Furthermore, the filter assembly 1 includes a drive device 101, a second cylindrical frame 102, a first cylindrical frame 103, a rotating rod 104, a first filter screen 105, and a second filter screen 106. The rotating rods 104 are symmetrically arranged on both sides of the bottom of the mounting frame 19. The bottom end of one set of rotating rods 104 is equipped with the first cylindrical frame 103, and the bottom end of the other set of rotating rods 104 is equipped with the second cylindrical frame 102 that cooperates with the drainage funnel 20. The second cylindrical frame 102 is equipped with the second filter screen 106 on both the outer side and the bottom. The second cylindrical frame 102 is located at the top inside the drainage funnel 20. The first cylindrical frame 103 is equipped with the first filter screen 105 on both the outer side and the bottom. The top of the mounting frame 19 is provided with a drive device 101 that is connected to the top of the two sets of rotating rods 104.

[0034] Furthermore, the waste discharge assembly 2 includes a U-shaped bin 201, a third servo motor 202, a U-shaped frame 203, a connecting plate 204, a lead screw 205, movable rods 206, and a piston 207. The top of the sedimentation bin 3 is equipped with the U-shaped bin 201, and the U-shaped frame 203 is installed at the middle position of the top of the U-shaped bin 201. The third servo motor 202 is installed at the middle position of the top of the U-shaped frame 203. The output end of the third servo motor 202 is equipped with a lead screw 205, and the outer thread of the lead screw 205 is provided with a connecting plate 204. Four sets of movable rods 206 are evenly installed at the bottom of the connecting plate 204. The bottom ends of the four sets of movable rods 206 extend into the interior of the sedimentation bin 3 and are equipped with pistons 207.

[0035] Furthermore, the sewage discharge assembly includes a sewage discharge funnel 14, a sewage discharge pipe 21, a second servo motor 27, a waste discharge pipe 28, and a spiral conveyor 29. Four sets of sewage discharge funnels 14 are evenly arranged at the bottom of the sedimentation chamber 3. A sewage discharge pipe 21 is installed at the bottom of the sewage discharge funnel 14. A waste discharge pipe 28 is installed on the inner side of two sets of support legs 30 on the same side. A spiral conveyor 29 is installed inside the waste discharge pipe 28. A second servo motor 27 connected to the spiral conveyor 29 is installed at the end of the waste discharge pipe 28 away from the transition chamber 7. A sewage discharge port is installed at the bottom of the waste discharge pipe 28 away from the inlet and outlet chambers 23.

[0036] Furthermore, the drive device 101 includes a drive motor, a first pulley, and a first transmission belt. The top ends of the two sets of rotating rods 104 extend above the mounting frame 19 and are equipped with first pulleys. The outer sides of the two sets of first pulleys are jointly provided with the first transmission belt. A drive motor that is connected to the rotating rods 104 is installed on one side of the top of the mounting frame 19, which helps to drive the two sets of rotating rods 104 to rotate synchronously, so that the second cylindrical frame 102 and the first cylindrical frame 103 can also rotate, thereby improving the filtration effect of the first filter screen 105 and the second filter screen 106.

[0037] Furthermore, four sets of auxiliary plates 15 are evenly installed at the bottom of the U-shaped compartment 201. Four sets of movable rods 206 pass through the middle position of the corresponding set of auxiliary plates 15. Slide rods are symmetrically installed at the middle positions of the two ends of the top of the U-shaped compartment 201. The tops of the two sets of slide rods pass through the connecting plate 204 and extend to the top of the connecting plate 204, which helps to improve the stability of the four sets of movable rods 206 during the lifting process.

[0038] Furthermore, six sets of stirring blades 4 are evenly installed on the outer side of the connecting shaft 5, and stirring rods 16 are evenly installed on the outer side of the rotating shaft 10, which helps to improve the mixing effect of chemical agents and waste liquid.

[0039] Furthermore, the transmission device 6 includes a second pulley and a second transmission belt. The ends of the connecting shaft 5 and the rotating shaft 10 away from the inlet / outlet hopper 23 extend to the outside of the transition hopper 7 and are both equipped with second pulleys. The outer sides of the two sets of second pulleys are jointly provided with a second transmission belt, which helps to drive the connecting shaft 5 and the rotating shaft 10 to rotate together.

[0040] Furthermore, a three-way connector 25 is installed on one side of the bottom of the inlet / outlet hopper 23, which is connected to the bottom of the drainage funnel 20. Both output ends of the three-way connector 25 are equipped with valves 26, and the output end of one set of valves 26 is connected to the top of the waste discharge pipe 28 near the inlet / outlet hopper 23, which helps to flush the inside of the waste discharge pipe 28 with the treated wastewater in the drainage funnel 20.

[0041] Furthermore, a method for treating waste liquid during PCB manufacturing includes the following steps:

[0042] First, while continuously pouring the waste liquid into the feed funnel 13, the corresponding amount of chemical agent is also continuously poured into the first cylindrical frame 103. The control panel 17 controls the drive device 101 to drive the rotating rod 104 and the first cylindrical frame 103 to rotate at a uniform speed, so that the waste liquid and chemical agent are mixed together and gradually precipitate is generated.

[0043] Second, the first servo motor 8 is controlled to drive the connecting shaft 5 to rotate. The connecting shaft 5 drives the spiral stirring paddle 9 and the rotating shaft 10 to rotate through the transmission device 6, thereby stirring the mixture inside the stirring chamber 11. The stirred mixture then enters the transition chamber 7.

[0044] 3. During the process of the mixed liquid entering the sedimentation tank 3, the sediment in the mixed liquid gradually sinks into the four sets of sewage discharge funnels 14. Then, the waste liquid that separates the sediment gradually flows into the drainage funnel 20 through the outlet 24. The rotating second filter screen 106 filters the waste liquid again. Finally, the treated waste liquid enters the three-way connector 25 from the bottom of the drainage funnel 20.

[0045] Fourth, at this time, open a set of valves 26 that are far away from the second servo motor 27 to discharge the treated waste liquid, and clean the first filter screen 105 and the second filter screen 106 regularly.

[0046] Example 1, as Figure 1-4 and Figure 7 As shown, the mixed liquid flows through the transition chamber 7 and then enters the sedimentation chamber 3. The sediment in the mixed liquid gradually settles to the bottom of the sedimentation chamber 3 and then falls into the four sets of sludge funnels 14. When the sediment in the sludge funnels 14 reaches a certain thickness, the second servo motor 27 drives the spiral conveyor 29 to rotate. The sediment at the bottom of the sludge funnel 14 enters the waste discharge pipe 28 through the sludge discharge pipe 21 and is gradually pushed by the spiral conveyor 29 to the sludge discharge port of the waste discharge pipe 28, thus being discharged into the external environment. A corresponding collection chamber is placed below the sludge discharge port to periodically collect and process the sediment. The mixed liquid after the sediment is separated enters one side of the inlet and outlet chamber 23 through the outlet 24 and enters the rotating second cylindrical frame 102. The second filter screen 106 filters the liquid again, and the finally treated waste liquid is discharged from the bottom of the drain funnel 20.

[0047] Example 2, as Figure 1-5As shown, when a large amount of sediment accumulates inside the sewage funnel 14, the third servo motor 202 is controlled to drive the lead screw 205 to rotate clockwise. The screw force compels the connecting plate 204 to rise along with the four sets of movable rods 206. The piston 207 moves away from the inside of the sewage pipe 21, thereby opening the bottom of the sewage funnel 14. This allows the sediment accumulated inside the sewage funnel 14 to gradually enter the waste discharge pipe 28 through the sewage pipe 21. If the sewage pipe 21 becomes blocked, the third servo motor 202 can be controlled to drive the lead screw 205 to rotate counterclockwise, causing the piston 207 to re-engage inside the sewage pipe 21 and push the sediment blocking the sewage pipe 21 into the waste discharge pipe 28. Then, the piston 207 is controlled to rise. This ensures that all the sediment inside the sewage funnel 14 can enter the waste discharge pipe 28, preventing blockage inside the sewage pipe 21.

[0048] Example 3, as Figure 4 As shown, when it is necessary to clean the inside of the waste discharge pipe 28, first open the sealing cover on the sewage outlet of the waste discharge pipe 28 by screwing it open, and then open a set of valves 26 near the second servo motor 27 to allow the treated waste liquid in the drainage funnel 20 to automatically flow into the inside of the waste discharge pipe 28 near the second servo motor 27. Then control the second servo motor 27 to drive the screw conveyor 29 to rotate, so that all the small amount of sediment inside the waste discharge pipe 28 can be cleaned up, and there is no need to use clean water, which improves the water resource utilization efficiency of the device.

[0049] Working principle: Before use, connect the device to the power supply. First, continuously pour the waste liquid into the feed funnel 13, and simultaneously continuously pour the corresponding amount of chemical agent into the first cylindrical frame 103. The control panel 17 controls the drive device 101 to drive the rotating rod 104 and the first cylindrical frame 103 to rotate at a uniform speed, allowing the waste liquid and chemical agent to mix and gradually form precipitates. The mixture then flows into the mixing chamber 11 through a set of strip-shaped through-holes 22. The first filter screen 105 on the first cylindrical frame 103 can filter out larger impurities in the waste liquid. Next, the first servo motor 8 drives the connecting shaft 5 to rotate. The connecting shaft 5, through the transmission device 6, drives the spiral stirring paddle 9 and the rotating shaft 10 to rotate, thereby agitating the mixing chamber. The mixture inside 11 is stirred, and the stirred mixture enters the transition chamber 7. The rotating connecting shaft 5 drives the stirring blade 4 to push the mixture to continue flowing into the sedimentation chamber 3. During the process of the mixture entering the sedimentation chamber 3, the sediment in the mixture gradually sinks into the four sets of sewage discharge funnels 14. Then, the waste liquid that separates the sediment gradually flows into the drainage funnel 20 through the outlet 24. The rotating second filter screen 106 filters the waste liquid again. Finally, the treated waste liquid enters the three-way connector 25 from the bottom of the drainage funnel 20. At this time, the valve 26 away from the second servo motor 27 is opened to discharge the treated waste liquid. The first filter screen 105 and the second filter screen 106 are cleaned regularly.

[0050] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0051] All electrical components mentioned in this article are connected to an external main controller and 220V AC mains power, and the main controller can be a conventional known device such as a computer that can control it.

[0052] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A waste liquid treatment device for PCB manufacturing process, comprising a sedimentation tank (3), a transition tank (7), a stirring tank (11), and an inlet / outlet tank (23), characterized in that: A partition (18) is installed in the middle of the inlet / outlet hopper (23). A drainage funnel (20) is provided on one side of the bottom of the inlet / outlet hopper (23). A mounting frame (19) is installed on the top of the inlet / outlet hopper (23), and a filter assembly (1) is provided at the bottom of the mounting frame (19). A feed funnel (13) is installed on the side of the mounting frame (19) near the mixing chamber (11). Mounting plates (12) are symmetrically installed at both ends inside the mixing chamber (11), and a rotating shaft (10) is provided on both ends of the two sets of mounting plates (12). A spiral stirring paddle (9) is installed on the outside of the rotating shaft (10). A strip is symmetrically opened at the bottom of the two sets of mounting plates (12). A through hole (22) is provided. A first servo motor (8) is installed at one end of the sedimentation tank (3) and the stirring tank (11) close to each other. A connecting shaft (5) is installed at the output end of the first servo motor (8). A transmission device (6) is provided at the same end of the connecting shaft (5) and the rotating shaft (10). A sewage discharge component is provided at the bottom of the sedimentation tank (3). A waste discharge component (2) is provided at the top of the sedimentation tank (3). A water outlet (24) is provided at one end of the sedimentation tank (3) close to the drainage funnel (20). Support legs (30) are symmetrically installed on both sides of the bottom of the transition tank (7) and the inlet and outlet tank (23). A control panel (17) is installed at one end of the stirring tank (11) away from the sedimentation tank (3). The filter assembly (1) includes a drive device (101), a second cylindrical frame (102), a first cylindrical frame (103), a rotating rod (104), a first filter screen (105), and a second filter screen (106). The mounting frame (19) has rotating rods (104) symmetrically arranged on both sides of its bottom. The bottom of one set of rotating rods (104) is equipped with a first cylindrical frame (103), and the bottom of the other set of rotating rods (104) is equipped with a second cylindrical frame (102) that cooperates with the drainage funnel (20). The second cylindrical frame (102) is equipped with a second filter screen (106) on its outer side and bottom. The second cylindrical frame (102) is located at the top inside the drainage funnel (20). The first cylindrical frame (103) is equipped with a first filter screen (105) on its outer side and bottom. The top of the mounting frame (19) is equipped with a drive device (101) that is connected to the top of the two sets of rotating rods (104). The waste discharge assembly (2) includes a U-shaped bin (201), a third servo motor (202), a U-shaped frame (203), a connecting plate (204), a lead screw (205), a movable rod (206), and a piston (207). The top of the sedimentation bin (3) is equipped with a U-shaped bin (201), and a U-shaped frame (203) is installed at the middle position of the top of the U-shaped bin (201). The third servo motor (202) is installed at the middle position of the top of the U-shaped frame (203). A lead screw (205) is installed at the output end of the third servo motor (202), and a connecting plate (204) is provided on the outer thread of the lead screw (205). Four sets of movable rods (206) are evenly installed at the bottom of the connecting plate (204). The bottom ends of the four sets of movable rods (206) extend into the interior of the sedimentation bin (3) and are equipped with pistons (207). The sewage discharge assembly includes a sewage discharge funnel (14), a sewage discharge pipe (21), a second servo motor (27), a waste discharge pipe (28), and a spiral conveyor (29). Four sets of sewage discharge funnels (14) are evenly arranged at the bottom of the sedimentation tank (3). A sewage discharge pipe (21) is installed at the bottom of the sewage discharge funnel (14). A waste discharge pipe (28) is installed on the inner side of two sets of support legs (30) on the same side. A spiral conveyor (29) is installed inside the waste discharge pipe (28). A second servo motor (27) connected to the spiral conveyor (29) is installed at the end of the waste discharge pipe (28) away from the transition tank (7). A sewage outlet is installed at the bottom of the waste discharge pipe (28) away from the inlet and outlet tank (23). The drive device (101) includes a drive motor, a first pulley and a first transmission belt. The top ends of the two sets of rotating rods (104) extend to the top of the mounting frame (19) and are equipped with first pulleys. The outer sides of the two sets of first pulleys are jointly provided with a first transmission belt. A drive motor that is connected to a set of rotating rods (104) is installed on one side of the top of the mounting frame (19). Six sets of stirring blades (4) are evenly installed on the outer side of the connecting shaft (5), and stirring rods (16) are evenly installed on the outer side of the rotating shaft (10). The transmission device (6) includes a second pulley and a second transmission belt. The connecting shaft (5) and the rotating shaft (10) extend from the end away from the feed hopper (23) to the outside of the transition hopper (7) and are both equipped with second pulleys. The outer sides of the two sets of second pulleys are jointly provided with second transmission belts.

2. The waste liquid treatment device for PCB manufacturing process according to claim 1, characterized in that: Four sets of auxiliary plates (15) are evenly installed at the bottom of the U-shaped compartment (201). The four sets of movable rods (206) pass through the middle position of the corresponding set of auxiliary plates (15). Sliding rods are symmetrically installed at the middle positions of the two ends of the top of the U-shaped compartment (201), and the tops of the two sets of sliding rods pass through the connecting plate (204) and extend to the top of the connecting plate (204).

3. The waste liquid treatment device for PCB manufacturing process according to claim 1, characterized in that: A three-way connector (25) connected to the bottom of the drainage funnel (20) is installed on one side of the bottom of the inlet / outlet hopper (23). Both output ends of the three-way connector (25) are equipped with valves (26), and the output end of one set of valves (26) is connected to the top of the waste discharge pipe (28) near the inlet / outlet hopper (23).

4. A method for treating waste liquid in PCB manufacturing as described in any one of claims 1-3, comprising the following steps: First, while continuously pouring the waste liquid into the feed funnel (13), at the same time continuously pouring the corresponding amount of chemical agent into the first cylindrical frame (103), and controlling the drive device (101) through the control panel (17) to drive the rotating rod (104) and the first cylindrical frame (103) to rotate at a uniform speed, so that the waste liquid and chemical agent are mixed together and gradually precipitate is generated; Second, control the first servo motor (8) to drive the connecting shaft (5) to rotate. The connecting shaft (5) drives the spiral stirring paddle (9) and the rotating shaft (10) to rotate through the transmission device (6), thereby stirring the mixture inside the stirring chamber (11). The stirred mixture enters the transition chamber (7).

3. During the process of the mixed liquid entering the sedimentation tank (3), the sediment in the mixed liquid gradually sinks into the four sets of sewage discharge funnels (14), and then the waste liquid separated from the sediment gradually flows into the drainage funnel (20) through the outlet (24). The rotating second filter screen (106) filters the waste liquid again, and finally the treated waste liquid enters the three-way connector (25) from the bottom of the drainage funnel (20). Fourth, at this time, open a set of valves (26) away from the second servo motor (27) to discharge the treated waste liquid, and clean the first filter screen (105) and the second filter screen (106) regularly.

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