Etching solution recovery and regeneration treatment device

Abstract

The utility model relates to etching liquid recovery technical field especially discloses etching liquid recovery and regeneration treatment device, including filter box and material collecting groove, and filter box is provided with filter groove, and the inside of filter groove is equipped with conveyer belt, and the top of conveyer belt is equipped with liquid inlet pipe and water inlet pipe in proper order, and the conveyer belt is provided with drain hole, and the surface of conveyer belt is covered with the filter membrane that crystal cannot pass, and the filter membrane filters out the crystal in liquid inlet pipe and by conveyer belt and is washed to water inlet pipe, and the discharge port is equipped on the filter groove and is close to material collecting groove, and the conveyer belt washes after the crystal of outputting to material collecting groove through discharge port, compares with traditional technology, and the technical scheme has realized the filtration of phosphorus crystal, and also has washed the waste liquid impurity that the phosphorus crystal surface remains, effectively guaranteed the purity of phosphorus crystal, and the subsequent circulation of etching liquid is convenient.

Description

Technical Field

[0001] This utility model relates to the field of etching solution recycling technology, and in particular to an etching solution recycling and regeneration device. Background Technology

[0002] Phosphoric acid etching solution is mainly used for surface pretreatment of anti-corrosion pipes (such as rust removal and phosphating) and precision etching of specific materials (such as aluminum and stainless steel). Due to its strong acidity and potential environmental hazards, this type of waste liquid needs to be treated through efficient recycling and regeneration technologies in order to achieve resource recycling and reduce environmental pollution.

[0003] Existing methods for recovering phosphoric acid etching solutions mostly involve adding seed crystals to the waste etching solution to generate phosphorus-containing crystals and then filtering them to achieve phosphorus recovery. However, the phosphorus-containing crystals collected by this method have residual waste etching solution on their surface, causing the phosphorus-containing crystals to be contaminated with a lot of waste solution impurities, which affects the purity of the phosphoric acid etching solution converted from the phosphorus-containing crystals and affects the recycling of the phosphoric acid etching solution.

[0004] Therefore, it is necessary to propose an etching solution recycling and regeneration device to remove waste liquid impurities from phosphorus-containing crystals and facilitate the recycling of phosphoric acid etching solution. Utility Model Content

[0005] The purpose of this invention is to solve the problem that existing phosphoric acid etching solutions are easily contaminated with a lot of waste liquid impurities during recycling, which affects the recycling of phosphoric acid etching solutions. The invention provides an etching solution recycling and regeneration treatment device.

[0006] The technical solution of this utility model is: The etching solution recycling and regeneration device includes a filter box and a collection tank. The filter box has a filter tank with a conveyor belt inside. The top of the conveyor belt has a liquid inlet pipe and a water inlet pipe in sequence. The conveyor belt has a drain hole. The surface of the conveyor belt is covered with a filter membrane that prevents crystals from passing through. The filter membrane filters out the crystals in the liquid inlet pipe and the conveyor belt transports the crystals to the water inlet pipe for rinsing. The filter tank has a discharge port near the collection tank. The conveyor belt outputs the rinsed crystals through the discharge port into the collection tank.

[0007] Furthermore, a first partition is provided inside the filter tank, which divides the filter tank into a filter chamber and a cleaning chamber. The liquid inlet pipe is located in the filter chamber, and the water inlet pipe is located in the cleaning chamber. The first partition can effectively separate the liquid splashes generated by the liquid inlet pipe and the water inlet pipe during liquid spraying and water spraying.

[0008] Furthermore, a second partition is provided inside the liquid collection tank, which divides the liquid collection tank into a liquid collection chamber and a water collection chamber. The liquid collection chamber is connected to a liquid outlet pipe, and the water collection chamber is connected to a water outlet pipe. The second partition can effectively separate the waste liquid filtered by the filter membrane and the wastewater generated after rinsing the crystals, preventing the two from mixing and facilitating the subsequent separate processing and reuse of the waste liquid and wastewater.

[0009] Furthermore, the conveyor belt has a drive shaft and a driven shaft at each end. The drive shaft is rotatably connected to the filter box. Both sides of the conveyor belt are equipped with a transmission chain for support and fixation. Both ends of the drive shaft and the driven shaft are fixedly connected with sprockets. The drive shaft drives the transmission chain to move through the sprockets, thereby driving the conveyor belt to move. The transmission chain is used to press and fix the filter membrane on the conveyor belt, and at the same time, it can fix and traction the conveyor belt. The drive shaft drives the sprockets to rotate, thereby driving the conveyor belt to move.

[0010] Furthermore, a first motor is connected to one end of the drive shaft, and the first motor is fixedly mounted on the filter box.

[0011] Furthermore, the liquid inlet pipe is connected to a mixing tank, the top of the mixing tank is equipped with a feed inlet, the mixing tank is equipped with a stirrer, and a second motor is fixedly installed at the bottom of the mixing tank. The second motor drives the stirrer to rotate to accelerate the formation of crystals.

[0012] Furthermore, the inlet pipe is connected to a water storage tank, and a water pump is installed inside the water storage tank. The water pump discharges the water in the water storage tank into the inlet pipe.

[0013] Furthermore, the liquid outlet pipe is connected to a waste liquid recovery tank, and the water outlet pipe is connected to a wastewater recovery tank. The waste liquid recovery tank is used to recover the etching solution waste liquid remaining after crystal filtration, and the wastewater recovery tank is used to recover the low-concentration etching solution waste liquid remaining after rinsing the crystal, so that they can be stored and collected independently.

[0014] Furthermore, a scraper is provided near the discharge port in the collection trough for scraping material from the conveyor belt. The scraper can help scrape off the phosphorus-containing crystals adhering to the filter membrane, effectively improving the crystal recovery efficiency.

[0015] Furthermore, a dustproof plate is installed at the opening of the filter tank. The dustproof plate can seal and protect the filter tank, preventing external dust from entering the filter tank and polluting the internal environment.

[0016] The etching solution recycling and regeneration device of this utility model has the following beneficial effects: 1. A conveyor belt is installed in the filter tank. The filter membrane covered on the conveyor belt can effectively filter phosphorus-containing crystals in the etching solution. At the same time, the conveyor belt can also provide support for the filter membrane, preventing the filter membrane from being deformed by the impact of the etching solution discharged from the inlet pipe, thus ensuring the filtration effect of the filter membrane. 2. The drainage holes on the conveyor belt can effectively discharge the etching solution waste liquid filtered out by the filter membrane and the wastewater generated from rinsing the crystal, avoiding the problem of poor drainage caused by the presence of the conveyor belt. 3. The top liquid inlet pipe and water inlet pipe of the conveyor belt are set in sequence so that the etching solution waste liquid is filtered through the filter membrane first. After filtration, the phosphorus-containing crystals remain on the filter membrane and are transported by the conveyor belt to the water inlet pipe, thereby rinsing off the waste liquid impurities remaining on the surface of the phosphorus-containing crystals, effectively ensuring the purity of the phosphorus-containing crystals and facilitating the subsequent recycling of the etching solution. Attached Figure Description

[0017] Figure 1 This is a perspective view of the structure of this utility model; Figure 2 This is a reference diagram showing the usage state of this utility model; Figure 3 This is a cross-sectional view of the present invention.

[0018] Reference numerals: 1. Filter box; 2. Collection trough; 3. Filter tank; 4. Conveyor belt; 5. Liquid inlet pipe; 6. Water inlet pipe; 7. Drain hole; 8. Filter membrane; 9. First partition; 10. Filter chamber; 11. Cleaning chamber; 12. Second partition; 13. Liquid collection chamber; 14. Water collection chamber; 15. Liquid outlet pipe; 16. Water outlet pipe; 17. Drive shaft; 18. Driven shaft; 19. Transmission chain; 20. Sprocket; 21. First motor; 22. Mixing tank; 23. Feed inlet; 24. Agitator; 25. Second motor; 26. Water storage tank; 27. Waste liquid recovery tank; 28. Wastewater recovery tank; 29. ​​Scraper; 30. Discharge port; 31. Dustproof plate. Detailed Implementation

[0019] To make the technical means, technical features, utility model purpose and technical effects of this utility model easier to understand, the present utility model will be further described below with reference to specific illustrations.

[0020] Example 1: like Figure 1 and Figure 3 As shown, this embodiment provides an etching solution recycling and regeneration device, including a filter box 1 and a collection tank 2. The filter box 1 and the collection tank 2 are fixedly connected by screws. The filter box 1 has a filter tank 3, and a conveyor belt 4 is provided in the filter tank 3. The top of the conveyor belt 4 is provided with an inlet pipe 5 and a water inlet pipe 6 in sequence. The conveyor belt 4 has a drain hole 7. The surface of the conveyor belt 4 is covered with a filter membrane 8 that prevents crystals from passing through. The filter membrane 8 filters out the crystals in the inlet pipe 5 and the conveyor belt 4 transports the crystals to the water inlet pipe 6 for rinsing. The filter tank 3 has an outlet 30 near the collection tank 2. The conveyor belt 4 outputs the rinsed crystals through the outlet 30 into the collection tank 2. The crystals are phosphorus-containing crystals.

[0021] Preferred, such as Figure 3 As shown, a first partition 9 is provided in the filter tank 3. The first partition 9 is fixedly connected to the filter box 1 with screws. The first partition 9 divides the filter tank 3 into a filter chamber 10 and a cleaning chamber 11. The liquid inlet pipe 5 is located in the filter chamber 10, and the water inlet pipe 6 is located in the cleaning chamber 11. The first partition 9 can effectively separate the liquid splashes generated by the liquid inlet pipe 5 and the water inlet pipe 6 when spraying liquid and water. Both the liquid inlet pipe 5 and the water inlet pipe 6 are fixed to the filter box 1 with screws. Preferably, a flow valve can be installed on both the liquid inlet pipe 5 and the water inlet pipe 6 to adjust the flow rate in real time according to the filtration speed in the filter tank 3.

[0022] Preferred, such as Figure 3 As shown, a second partition 12 is provided in the liquid collection tank. The second partition 12 is fixed to the filter box 1 by screws or welding. The second partition 12 divides the liquid collection tank into a liquid collection chamber 13 and a water collection chamber 14. The liquid collection chamber 13 is connected to a liquid outlet pipe 15, and the water collection chamber 14 is connected to a water outlet pipe 16. The second partition 12 can effectively separate the waste liquid filtered by the filter membrane 8 and the wastewater generated after rinsing the crystals, preventing the two from mixing and facilitating the subsequent separate processing and reuse of the waste liquid and wastewater.

[0023] Preferred, such as Figure 1 and Figure 3 As shown, the conveyor belt 4 adopts a multi-segment chain structure. The two ends of the conveyor belt 4 are respectively provided with a drive shaft 17 and a driven shaft 18. The drive shaft 17 is rotatably connected to the filter box 1 through bearings. Both sides of the conveyor belt 4 are fixedly connected with a transmission chain 19 for support and fixation by screws. Both ends of the drive shaft 17 and the driven shaft 18 are fixedly connected with sprockets 20 by screws. The drive shaft 17 drives the transmission chain 19 to move through the sprockets 20, thereby driving the conveyor belt 4 to move. The driven shaft 18 rotates synchronously with the drive shaft 17. The transmission chain 19 is used to press and fix the filter membrane 8 on the conveyor belt 4. The specific pressing method can be screw locking, or it can be glued or snapped. At the same time, the transmission chain 19 can fix and pull the conveyor belt 4. The drive shaft 17 drives the sprockets 20 to rotate, thereby driving the conveyor belt 4 to move.

[0024] Preferred, such as Figure 1 As shown, a first motor 21 is fixedly connected to one end of the drive shaft 17 with screws, and the first motor 21 is fixedly installed on the filter box 1 with screws.

[0025] Preferred, such as Figure 1 and Figure 2As shown, the liquid inlet pipe 5 is fixedly connected to the mixing tank 22 by flange screws. The top of the mixing tank 22 is provided with a feed port 23. The mixing tank 22 is provided with a stirrer 24. The stirrer 24 is rotatably connected to the bottom of the mixing tank 22 by a bearing. The bottom of the mixing tank 22 is fixedly installed with a second motor 25 by screws. The second motor 25 drives the stirrer 24 to rotate to accelerate the formation of crystals. Preferably, the liquid inlet pipe 5 can be equipped with a scattering nozzle to increase the range of etching waste liquid discharge, so that each position of the filter membrane 8 in the filter chamber 10 is in contact with the etching waste liquid, thereby improving the filtration efficiency. Similarly, the water inlet pipe 6 can be equipped with a scattering nozzle to expand the heat dissipation range of the water and improve the cleaning efficiency.

[0026] Preferred, such as Figure 1 and Figure 2 As shown, the water inlet pipe 6 is fixedly connected to the water storage tank 26 via a flange. A water pump is installed inside the water storage tank 26, and the water pump discharges the water in the water storage tank 26 into the water inlet pipe 6.

[0027] Preferred, such as Figure 2 As shown, the liquid outlet pipe 15 is fixedly connected to the waste liquid recovery tank 27 via a flange, and the water outlet pipe 16 is fixedly connected to the waste water recovery tank 28 via a flange. The waste liquid recovery tank 27 is used to recover the etching solution waste liquid remaining after crystal filtration, and the waste water recovery tank 28 is used to recover the phosphoric acid-water mixture remaining after rinsing the crystal, so that they can be stored and collected independently. Since the main difference between the waste water recovery tank 28 and the waste liquid recovery tank 27 is the water content, it is convenient to use different treatment processes to treat the two etching solution waste liquids of different concentrations, thereby improving the waste liquid recovery efficiency.

[0028] Preferred, such as Figure 3 As shown, a scraper 29 for scraping material from the conveyor belt 4 is provided in the collection trough 2 near the discharge port 30. The scraper 29 is fixed to the collection trough 2 by welding. The scraper 29 can assist in scraping the phosphorus-containing crystals adhering to the filter membrane 8, effectively improving the crystal recovery efficiency. In order to avoid the scraper 29 scraping the phosphorus-containing crystals, brush bristles can be installed on the scraper 29. The high friction of the brush bristles can be used to scrape the phosphorus-containing crystals off the filter membrane 8 and collect them.

[0029] Preferred, such as Figure 2 As shown, a dustproof plate 31 is provided at the opening of the filter tank 3. The dustproof plate 31 can seal and protect the filter tank 3, preventing external dust from entering the filter tank 3 and polluting the internal environment.

[0030] The working principle of this technical solution is as follows: Figures 1-3As shown, the feed inlet 23 is opened, and etching waste liquid is injected into the mixing tank 22 through the feed inlet 23. Then, seed crystals are added. Under preset temperature and pressure conditions, the second motor 25 is turned on, driving the stirrer 24 to rotate, thereby accelerating the mixing speed of the seed crystals in the etching waste liquid, thus accelerating the condensation speed of the phosphorus-containing crystals. Then, the liquid inlet pipe 5 is opened, and the etching waste liquid is discharged into the conveyor belt 4 in the filter chamber 10. The filter membrane 8 filters out the phosphorus-containing crystals and leaves them on the conveyor belt 4, while the remaining etching waste liquid passes through the filter membrane 8 and enters the collection chamber 13 through the drain hole 7, realizing the collection of etching waste liquid. After filtration is completed, the first motor 21 is started, and the drive shaft 17 drives the sprocket 20 to rotate. The sprocket 20 rotates, driving the transmission chain 19 to move. The transmission chain 19 drives the conveyor belt 4 to transport the phosphorus-containing crystals to the water inlet pipe 6. The water inlet pipe 6 discharges water to rinse the surface of the phosphorus-containing crystals, removing residual etching solution and other impurities. The wastewater generated passes through the filter membrane 8, drains through the drain hole 7, and enters the water collection chamber 14 for collection. The rinsed phosphorus-containing crystals continue to be transported by the conveyor belt 4 to the discharge port 30. As the conveyor belt 4 rotates downward with the drive shaft 17, most of the phosphorus-containing crystals are poured into the collection tank 2, and a small amount of phosphorus-containing crystals are scraped off by the scraper 29 and collected in the collection tank 2. At this point, the recovery of phosphorus-containing crystals is completed, facilitating the subsequent regeneration and recycling of phosphoric acid.

[0031] This invention relates to an etching solution recycling and regeneration device. A conveyor belt 4 is installed within a filter tank 3. A filter membrane 8 covering the conveyor belt 4 effectively filters phosphorus-containing crystals from the etching solution. Simultaneously, the conveyor belt 4 provides support for the filter membrane 8, preventing deformation caused by the impact of the etching solution discharged from the inlet pipe 5, thus ensuring the filtration effect of the filter membrane 8. Drainage holes 7 on the conveyor belt 4 effectively discharge the waste etching solution filtered by the filter membrane 8 and the wastewater generated from rinsing the crystals, avoiding drainage problems caused by the presence of the conveyor belt 4. The top inlet pipe 5 and water inlet pipe 6 of the conveyor belt 4 are sequentially arranged, allowing the waste etching solution to be filtered first through the filter membrane 8. After filtration, the phosphorus-containing crystals remain on the filter membrane 8 and are transported by the conveyor belt 4 to the water inlet pipe 6, where residual waste liquid impurities on the surface of the phosphorus-containing crystals are rinsed off, effectively ensuring the purity of the phosphorus-containing crystals and facilitating subsequent recycling of the etching solution.

[0032] The above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of this utility model. All equivalent changes and modifications made in accordance with the scope of the claims of this utility model should fall within the technical scope of this utility model.

Claims

1. An etching solution recycling and regeneration device, comprising a filter box (1) and a collection tank (2), characterized in that: The filter box (1) has a filter tank (3), and a conveyor belt (4) is provided inside the filter tank (3). The top of the conveyor belt (4) is provided with an inlet pipe (5) and a water inlet pipe (6) in sequence. A drain hole (7) is provided on the conveyor belt (4). The surface of the conveyor belt (4) is covered with a filter membrane (8) that crystals cannot pass through. The filter membrane (8) filters out the crystals in the inlet pipe (5) and the conveyor belt (4) transports the crystals to the water inlet pipe (6) for rinsing. A discharge port (30) is provided on the filter tank (3) near the collection tank (2). The conveyor belt (4) outputs the rinsed crystals to the collection tank (2) through the discharge port (30).

2. The etching solution recycling and regeneration device according to claim 1, characterized in that: The filter tank (3) is provided with a first partition (9), which divides the filter tank (3) into a filter chamber (10) and a cleaning chamber (11). The liquid inlet pipe (5) is located in the filter chamber (10), and the water inlet pipe (6) is located in the cleaning chamber (11).

3. The etching solution recycling and regeneration device according to claim 1, characterized in that: The liquid collection tank is provided with a second partition (12), which divides the liquid collection tank into a liquid collection chamber (13) and a water collection chamber (14). The liquid collection chamber (13) is connected to a liquid outlet pipe (15), and the water collection chamber (14) is connected to a water outlet pipe (16).

4. The etching solution recycling and regeneration device according to claim 1, characterized in that: The conveyor belt (4) is provided with a drive shaft (17) and a driven shaft (18) at both ends, and the drive shaft (17) is rotatably connected to the filter box (1); Both sides of the conveyor belt (4) are provided with transmission chains (19) that provide support and fixation. Both ends of the drive shaft (17) and both ends of the driven shaft (18) are fixedly connected with sprockets (20). The drive shaft (17) drives the transmission chain (19) to move through the sprockets (20), thereby driving the conveyor belt (4) to move.

5. The etching solution recycling and regeneration device according to claim 4, characterized in that: One end of the drive shaft (17) is connected to the first motor (21), which is fixedly installed on the filter box (1).

6. The etching solution recycling and regeneration device according to claim 1, characterized in that: The liquid inlet pipe (5) is connected to the stirring tank (22). The stirring tank (22) has a feed inlet (23) at the top and a stirrer (24) inside. A second motor (25) is fixedly installed at the bottom of the stirring tank (22). The second motor (25) drives the stirrer (24) to rotate to accelerate the formation of crystals.

7. The etching solution recycling and regeneration device according to claim 1, characterized in that: The inlet pipe (6) is connected to a water storage tank (26), and a water pump is installed inside the water storage tank (26). The water pump discharges the water in the water storage tank (26) into the inlet pipe (6).

8. The etching solution recycling and regeneration device according to claim 3, characterized in that: The liquid outlet pipe (15) is connected to the waste liquid recovery tank (27), and the water outlet pipe (16) is connected to the waste water recovery tank (28).

9. The etching solution recycling and regeneration device according to claim 1, characterized in that: The material collection trough (2) is equipped with a scraper (29) near the discharge port (30) for scraping material from the conveyor belt (4).

10. The etching solution recycling and regeneration device according to claim 1, characterized in that: A dustproof plate (31) is provided at the opening of the filter tank (3).

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