Device for preparing high-purity copper powder and polyaluminum chloride from acid etching waste liquid and energy-saving co-production process thereof

Abstract

The application discloses a device for preparing high-purity copper powder and polyaluminum chloride from acid etching waste liquid and an energy-saving co-production process thereof, relates to the technical field of recycling of acid etching waste liquid, and comprises a supporting base, a reaction assembly is arranged on the top of the supporting base, and the reaction assembly comprises a preparation tank body, a sealing cover and an extension rod. In the application, the top of the compression ring is connected with the extension rod and the guide piece, the top of the guide piece is overlapped with the adjusting block through the contact head, the reciprocating movement of the guide rod on the top of the supporting plate can be driven when the cam rotates, the lifting of the guide piece can be driven through the adjusting block, the use height of the compression ring and the guide disc is adjusted, the extrusion of the aluminum sheet is realized, the flow of the waste liquid in and out of the mixing tank is accelerated, the aluminum sheet is stirred through the stirring blade, and the aluminum sheet is fully contacted and reacted with the waste liquid; the filter screen is arranged in the filter box, copper powder in the waste liquid can be quickly separated, copper powder residues in the waste liquid are reduced, and the subsequent centralized recovery of the copper powder is facilitated.

Description

Technical Field

[0001] This invention relates to the field of acid etching waste liquid recycling technology, specifically to equipment and energy-saving co-production process for preparing high-purity copper powder and polyaluminum chloride from acid etching waste liquid. Background Technology

[0002] Etching solutions are liquids that carve materials by eroding them. There are many types of etching solutions, including: acidic copper chloride, alkaline copper chloride, ferric chloride, ammonium persulfate, sulfuric acid / chromic acid, and sulfuric acid / hydrogen peroxide etching solutions. High-purity copper powder and polyaluminum chloride can be prepared from acidic etching waste liquid, which can realize the reuse of waste liquid and reduce resource waste.

[0003] When preparing copper powder from acidic etching waste liquid, aluminum sheets need to be placed in the container to replace the copper powder. Since the volume of the waste liquid inside the container is large, aluminum sheets need to be placed in batches. After the aluminum sheets are placed in the container, they are stacked together. Some copper powder will adhere to the surface of the aluminum sheets, preventing the aluminum sheets from contacting the waste liquid, thus affecting the subsequent reaction of the aluminum sheets and reducing the replacement speed of the aluminum sheets. Summary of the Invention

[0004] The purpose of this invention is to provide equipment and energy-saving co-production process for preparing high-purity copper powder and polyaluminum chloride from acidic etching waste liquid, so as to solve the problem mentioned in the background art that when aluminum sheets are placed in a container, they are stacked together, and some copper powder adheres to the surface of the aluminum sheets, which prevents the aluminum sheets from contacting the waste liquid, thereby affecting the subsequent reaction of the aluminum sheets and reducing the replacement rate of the aluminum sheets.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an apparatus for preparing high-purity copper powder and polyaluminum chloride from acidic etching waste liquid, comprising a support base, a reaction assembly being provided on the top of the support base, the reaction assembly comprising a preparation tank, a sealing cap, and a telescopic rod, one end of the liquid inlet pipe being fixedly connected to the preparation tank, a sealing cap being fixedly connected to the top of the preparation tank, a mixing tank being fixedly connected to one side of the inner wall of the preparation tank, a pressure ring being slidably connected to the inner wall of the mixing tank, a guide plate being fixedly connected to the inner ring surface of the pressure ring, a pressing component being fixedly connected to the bottom of the pressure ring, and the top of the pressure ring being fixedly connected to the bottom end of the telescopic rod, the telescopic rod being a telescopic structure with an inner rod and an outer rod sleeved together, and a crossbar being fixedly connected to one side of the inner rod of the telescopic rod; An auxiliary mechanism is provided on the top of the support base. The auxiliary mechanism includes a geared motor, a stirring shaft, and a support plate. One side of the geared motor is fixedly connected to a sealing cover. One end of the output shaft of the geared motor is fixedly connected to the stirring shaft. A stirring blade is fixedly connected to the bottom of the stirring shaft. The stirring shaft passes through the support plate and the guide plate. A reciprocating mechanism is provided on the top of the guide plate. The reciprocating mechanism includes a cam, a guide member, and a guide rod. The stirring shaft is inserted through the cam. An adjusting block is fixedly connected to one end of the guide rod. A contact head overlaps the bottom of the adjusting block. The bottom of the contact head is fixedly connected to the guide member.

[0006] Preferably, a guide seat is inserted through the outside of the guide member, and a spring is fixedly connected to the top of the guide seat. The other end of the spring is fixedly connected to the bottom of the contact head.

[0007] Preferably, the guide seat and the guide member are slidably connected, the top of the guide seat is fixedly connected to the support plate, and one side of the support plate is fixedly connected to the inner wall of the preparation tank.

[0008] Preferably, the top of the support plate is slidably connected to the guide rod, a slide rod is inserted through the guide rod, one end of the slide rod is fixedly connected to the inner wall of the support plate, and a spring is sleeved on the outside of the slide rod.

[0009] Preferably, one end of the guide rod is connected to the cam, and the bottom of the cam is rotatably connected to the support plate.

[0010] Preferably, a collection hopper is fixedly connected to the inner wall of the preparation tank, a drainage pipe is fixedly connected to the bottom of the collection hopper, and a guide pipe is fixedly connected to one end of the drainage pipe.

[0011] Preferably, a filter assembly is installed on the top of the support base. The filter assembly includes a filter box, a filter screen, and a drain pipe. The inner wall of the filter box is snapped together with the filter screen. One end of the drain pipe passes through the side wall of the filter box, and the top side wall of the filter box is penetrated by a guide pipe.

[0012] An energy-saving co-production process for preparing high-purity copper powder and polyaluminum chloride from acidic etching waste liquid includes the following steps: S1. Pretreatment of waste liquid: The collected acidic copper chloride-containing waste etching liquid is mixed with aluminum hydroxide and sent into the reaction tank. Hydrogen peroxide and flocculant are added to the reaction tank and stirred with a stirring device to make the flocculant and waste liquid fully mixed. Then, it is allowed to stand, and the resulting precipitate is quickly filtered. The separated waste liquid is discharged to complete the solid-liquid separation. S2. Preparation of high-purity copper powder: The pretreated waste liquid is sent into the preparation tank through the inlet pipe. The mixing tank contains aluminum sheets. The reaction between the aluminum sheets and the waste liquid is accelerated by stirring with the stirring blades and processing with the pressing parts. The waste liquid containing mixed copper powder is obtained in the preparation tank. The waste liquid enters the filter box through the drainage pipe and guide pipe. After filtration by the filter screen, the copper powder can be separated from the remaining solution. The collected copper powder is taken out, dried and cooled to complete the preparation of copper powder. S3, Preparation of crystalline aluminum chloride: The remaining solution in S2 is sent into a washing centrifuge through a drain pipe. The washing time and centrifugation rate are set. After washing and centrifuging, the solution is stored in a buffer tank. The solution in the buffer tank is sent into the reaction tank by a water pump. The top of the reaction tank is sealed and hydrogen chloride gas is introduced into the reaction tank to react with the solution and generate crystalline aluminum chloride. S4. Preparation of high-purity polyaluminum chloride: Set the crushing time of the pulverizer and use the pulverizer to crush the crystalline aluminum chloride generated in S3. Then, the crystalline aluminum chloride powder is subjected to fluidized bed pyrolysis and cyclone separation. After processing, aluminum chloride powder is formed. Then, the aluminum chloride powder is hydrolyzed and activated by an activator. After the powder is activated, it is filtered to separate solid and liquid, and the excess liquid is discharged. The remaining solid is high-purity polyaluminum chloride.

[0013] Preferably, in step S3, the temperature of the reaction tank is 20-25°C, and the amount of hydrogen chloride gas introduced is 230-280L.

[0014] Preferably, in step S4, crystalline aluminum chloride is pulverized using a pulverizer, and the diameter of the pulverized crystalline aluminum chloride is 65-800 μm. The pyrolysis activation time of the crystalline aluminum chloride powder in the fluidized bed is 0.4-4.5 h.

[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. In this invention, the top of the pressure ring can be connected by a telescopic rod and a guide. The top of the guide is connected to the adjusting block through a contact head. When the cam rotates, it can drive the guide rod to move back and forth on the top of the support plate. The adjusting block can drive the lifting and lowering of the guide, thereby adjusting the working height of the pressure ring and the guide plate, realizing the extrusion of aluminum sheets, and also accelerating the flow of waste liquid inside and outside the mixing tank. Then, the aluminum sheets are stirred by the stirring blades, so that the aluminum sheets and waste liquid can fully contact and react, thereby ensuring the reaction of the aluminum sheets, improving the replacement speed of aluminum sheets, and improving the overall efficiency of the equipment.

[0016] 2. In this invention, a crossbar is installed on the inner wall of the support plate. The crossbar guides the movement of the guide rod, thereby improving the stability of the guide rod's movement. The compression and tension of the second spring drive the guide rod and the contact head to reset, facilitating the reciprocating movement of the guide rod. The collection hopper is fixedly connected to the inner wall of the preparation tank, and the bottom of the collection hopper is fixedly connected to the drainage pipe. The waste liquid after the reaction can be collected and sent into the guide pipe through the drainage pipe to guide the waste liquid. The filter screen is set inside the filter box, which can quickly separate copper powder in the waste liquid and reduce copper powder residue in the waste liquid. The filter screen is detachable, which facilitates the subsequent centralized recovery of copper powder.

[0017] 3. In this invention, the treated solution can be discharged through the drain pipe. After washing and centrifugation, the solution can be separated again and sent into the reaction tank. Then, hydrogen chloride gas is introduced to increase the crystallization rate of aluminum chloride in the reaction tank, thereby obtaining crystalline aluminum chloride. Through pyrolysis activation, the crystalline aluminum chloride can be processed into aluminum chloride powder, and then activated to generate high-purity polyaluminum chloride, thereby improving the purity of the generated polyaluminum chloride. The whole operation process is simple, has low energy consumption, and has good energy-saving and environmental protection effects. Attached Figure Description

[0018] Figure 1 A schematic diagram of the overall structure of the equipment for preparing high-purity copper powder and polyaluminum chloride from acidic etching waste liquid of the present invention and its energy-saving co-production process; Figure 2 A schematic diagram of the mixing tank structure installation for the equipment and energy-saving co-production process for preparing high-purity copper powder and polyaluminum chloride from acidic etching waste liquid of the present invention. Figure 3 A schematic diagram of the filter structure installation for the equipment and energy-saving co-production process for preparing high-purity copper powder and polyaluminum chloride from acidic etching waste liquid of the present invention. Figure 4 A schematic diagram of the drainage pipe structure of the equipment for preparing high-purity copper powder and polyaluminum chloride from acidic etching waste liquid of the present invention and its energy-saving co-production process; Figure 5 A schematic diagram of the connection structure between the pressure ring and the pressing component in the equipment for preparing high-purity copper powder and polyaluminum chloride from the acidic etching waste liquid of this invention and its energy-saving co-production process. Figure 6 A schematic diagram of the cam structure installation for the equipment and energy-saving co-production process for preparing high-purity copper powder and polyaluminum chloride from acidic etching waste liquid of the present invention. Figure 7 A schematic diagram of the connection between the guide component and the support plate structure of the equipment for preparing high-purity copper powder and polyaluminum chloride from acidic etching waste liquid of the present invention and its energy-saving co-production process. Figure 8 This is a schematic diagram of the contact head structure installation for the equipment and energy-saving co-production process used in the preparation of high-purity copper powder and polyaluminum chloride from acidic etching waste liquid of the present invention.

[0019] In the picture: 1. Reaction assembly; 11. Inlet pipe; 12. Preparation tank; 13. Collection hopper; 131. Drain pipe; 14. Sealing cap; 15. Mixing tank; 151. Pressure ring; 152. Pressing component; 153. Guide plate; 154. Telescopic rod; 2. Support base; 3. Filter assembly; 31. Filter box; 32. Filter screen; 33. Drain pipe; 4. Guide pipe; 5. Auxiliary mechanism; 51. Gear motor; 52. Stirring shaft; 53. Support plate; 54. Stirring blade; 6. Reciprocating mechanism; 61. Cam; 62. Adjusting block; 63. Guide component; 64. Guide rod; 65. Contact head; 66. Spring 1; 67. Spring 2; 68. Slide rod; 69. Guide seat. Detailed Implementation

[0020] 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.

[0021] Example 1: Refer to Figure 1-8 As shown: Equipment for preparing high-purity copper powder and polyaluminum chloride from acidic etching waste liquid includes a support base 2, a reaction component 1 is set on the top of the support base 2, the reaction component 1 includes a preparation tank 12, a sealing cover 14 and a telescopic rod 154, one end of the liquid inlet pipe 11 is fixedly connected to the preparation tank 12, the sealing cover 14 is fixedly connected to the top of the preparation tank 12, a mixing tank 15 is fixedly connected to one side of the inner wall of the preparation tank 12, a pressure ring 151 is slidably connected to the inner wall of the mixing tank 15, a guide plate 153 is fixedly connected to the inner ring surface of the pressure ring 151, a pressing part 152 is fixedly connected to the bottom of the pressure ring 151, and the top of the pressure ring 151 is fixedly connected to the bottom end of the telescopic rod 154. The telescopic rod 154 is a telescopic structure with an inner rod and an outer rod sleeved together, and a crossbar is fixedly connected to one side of the inner rod of the telescopic rod 154. The top of the support base 2 is provided with an auxiliary mechanism 5, which includes a reduction motor 51, a stirring shaft 52 and a support plate 53. One side of the reduction motor 51 is fixedly connected to the sealing cover 14, and one end of the output shaft of the reduction motor 51 is fixedly connected to the stirring shaft 52. The bottom of the stirring shaft 52 is fixedly connected with a stirring blade 54. The stirring shaft 52 passes through the support plate 53 and the guide plate 153. The top of the guide plate 153 is provided with a reciprocating mechanism 6, which includes a cam 61, a guide member 63 and a guide rod 64. The stirring shaft 52 is inserted through the cam 61. One end of the guide rod 64 is fixedly connected to an adjusting block 62. The bottom of the adjusting block 62 is connected to a contact head 65, and the bottom of the contact head 65 is fixedly connected to the guide member 63.

[0022] A guide seat 69 is inserted through the outside of the guide member 63. A spring 66 is fixedly connected to the top of the guide seat 69. The other end of the spring 66 is fixedly connected to the bottom of the contact head 65. The guide seat 69 and the guide member 63 are slidably connected. The top of the guide seat 69 is fixedly connected to the support plate 53. One side of the support plate 53 is fixedly connected to the inner wall of the preparation tank 12. The top of the support plate 53 is slidably connected to the guide rod 64. A slide rod 68 is inserted through the inside of the guide rod 64. One end of the slide rod 68 is fixedly connected to the inner wall of the support plate 53, and a spring 67 is sleeved on the outside of the slide rod 68. One end of the guide rod 64 overlaps with the cam 61. The bottom of the cam 61 is rotatably connected to the support plate 53.

[0023] In this embodiment, the pretreated acidic etching waste liquid can be sent into the preparation tank 12 through the liquid inlet pipe 11. One side of the mixing tank 15 is fixedly connected to the inner wall of the preparation tank 12, so that the mixing tank 15 can be stably installed and used inside the preparation tank 12. The pressure ring 151 is fixedly connected to the pressing part 152, so that the pressure ring 151 and the pressing part 152 can be raised and lowered synchronously. The inner rod and the outer rod of the telescopic rod 154 are slidably connected, so that the overall length of the telescopic rod 154 can be adjusted to adapt to the height change of the pressure ring 151. Since one side of the inner rod of the telescopic rod 154 is fixedly connected to the guide part 63 through the crossbar, the guide part 63 and the inner rod can be raised and lowered synchronously, ensuring the synchronicity of the raising and lowering of both sides of the pressure ring 151, thereby improving the stability of the raising and lowering of the pressure ring 151. The geared motor 51 drives the stirring shaft 52 to rotate, which in turn drives the stirring blades 54 to rotate, thus stirring the aluminum sheets. This changes the position of the aluminum sheets inside the mixing tank 15, accelerates the movement of the aluminum sheets, and reduces the adhesion of copper powder to the surface of the aluminum sheets, thereby reducing the obstruction of the aluminum sheet surface by copper powder. Since the stirring shaft 52 passes through the cam 61, the cam 61 can rotate with the stirring shaft 52. The two ends of the cam 61 have different diameters, so when the larger diameter end contacts the guide rod 64, it can drive the guide rod 64 to move to one side. When the guide rod 64 moves, The bottom of the guide rod 64 is engaged in the slot at the top of the support plate 53. The slot and the slide rod 68 can guide the movement of the guide rod 64, thereby driving the guide rod 64 to move smoothly on the top of the support plate 53. A second spring 67 is sleeved on the outside of the slide rod 68. When the guide rod 64 moves, it can drive the second spring 67 on one side to compress. Therefore, when the cam 61 is no longer in contact with the guide rod 64, the compressed second spring 67 tends to reset, thereby realizing the reset movement of the guide rod 64 and returning the guide rod 64 to the initial position. This facilitates the repeated use of the guide rod 64 and realizes the reciprocating drive of the adjusting block 62. The adjusting block 62 has an arc-shaped groove at its bottom, and the contact head 65 has a hemispherical top. Therefore, when the adjusting block 62 moves, it can apply a downward force to the contact head 65, driving the contact head 65 and the guide member 63 to move downward, thereby adjusting the height of the guide member 63. When the guide member 63 rises or falls, the guide seat 69 can guide the guide member 63. A spring 66 is installed between the contact head 65 and the guide seat 69. When the contact head 65 moves downward, the spring 66 is compressed, thereby using the elasticity of the spring 66 to drive the guide member 63 and the contact head 65 upward. The guide 63 moves up and down, and when the guide 63 moves down, the pressure ring 151, the pressing part 152 and the guide plate 153 move up and down synchronously. The pressing part 152 is L-shaped, which can increase the contact area between the bottom of the pressure ring 151 and the aluminum sheet, thereby improving the squeezing effect on the aluminum sheet. It can also adjust the hydraulic pressure inside the mixing tank 15. The pressure difference generated by the up and down movement can accelerate the movement of waste liquid on both sides of the mixing tank 15, thereby realizing the exchange of waste liquid and making the waste liquid at different positions fully contact the aluminum sheet, so that the aluminum sheet can fully react.

[0024] Example 2: According to Figures 1-3 As shown, a collection hopper 13 is fixedly connected to the inner wall of the preparation tank 12. A drainage pipe 131 is fixedly connected to the bottom of the collection hopper 13. A guide pipe 4 is fixedly connected to one end of the drainage pipe 131. A filter assembly 3 is installed on the top of the support base 2. The filter assembly 3 includes a filter box 31, a filter screen 32, and a drain pipe 33. The inner wall of the filter box 31 is engaged with the filter screen 32. One end of the drain pipe 33 penetrates the side wall of the filter box 31. The top side wall of the filter box 31 is penetrated by the guide pipe 4.

[0025] Meanwhile, the collection hopper 13 can be used to protect the bottom of the mixing tank 15, collecting the waste liquid and copper powder discharged through the side wall and bottom through-hole of the mixing tank 15. The bottom of the collection hopper 13 is connected to the drainage pipe 131, which can assist in the discharge of the waste liquid collected inside the collection hopper 13. Since the height of the guide pipe 4 is lower than that of the collection hopper 13, the waste liquid can smoothly enter the guide pipe 4 after the valve on the drainage pipe 131 is opened. The support base 2 can provide stable support for the installation and use of the filter box 31. The bottom of the guide pipe 4 penetrates the top side wall of the filter box 31, making it easy to send the waste liquid into the filter box 31. The filter screen 32 can filter the waste liquid, thereby achieving rapid separation of copper powder and waste liquid, reducing the residue of copper powder in the waste liquid. The filtered waste liquid enters the bottom of the inner cavity of the filter box 31 and is then discharged through the drain pipe 33, which facilitates the next treatment step of the waste liquid, thereby improving the utilization rate of waste liquid and reducing environmental pollution and resource waste caused by random discharge of waste liquid.

[0026] Example 3: An energy-saving co-production process for preparing high-purity copper powder and polyaluminum chloride from acidic etching waste liquid, comprising the following steps: Step 1: Pretreatment of waste liquid: Mix the collected acidic copper chloride-containing waste etching liquid with aluminum hydroxide and send it into the reaction tank. Add hydrogen peroxide and flocculant to the reaction tank and stir with a stirring device to fully mix the flocculant with the waste liquid. Then let it stand, quickly filter the resulting precipitate, and discharge the separated waste liquid to complete the solid-liquid separation. Step 2, Preparation of high-purity copper powder: The pretreated waste liquid is sent into the preparation tank 12 through the inlet pipe 11. The mixing tank 15 contains aluminum sheets. The reaction between the aluminum sheets and the waste liquid is accelerated by the stirring of the stirring blade 54 and the processing of the pressing part 152. The waste liquid containing mixed copper powder is obtained in the preparation tank 12. The waste liquid enters the filter box 31 through the diversion pipe 131 and the guide pipe 4. After being filtered by the filter screen 32, the copper powder can be separated from the remaining solution. The collected copper powder is taken out, dried and cooled to complete the preparation of copper powder. Step 3, Preparation of crystalline aluminum chloride: The remaining solution from Step 2 is sent into a washing centrifuge through drain pipe 33. The washing time and centrifugation rate are set. After washing and centrifugation, the solution is stored in a buffer tank. The solution in the buffer tank is sent into the reaction tank using a water pump. The top of the reaction tank is sealed. Hydrogen chloride gas is introduced into the reaction tank to react with the solution and generate crystalline aluminum chloride. The temperature of the reaction tank is 25°C and the amount of hydrogen chloride gas introduced is 260L. Step 4: Preparation of high-purity polyaluminum chloride: Set the pulverizing time of the pulverizer and use the pulverizer to pulverize the crystalline aluminum chloride generated in Step 3. Then, the crystalline aluminum chloride powder is subjected to fluidized bed pyrolysis and cyclone separation to form aluminum chloride powder. Then, the aluminum chloride powder is hydrolyzed and activated using an activator. After activation, the powder is filtered to separate solids and liquids, and excess liquid is discharged. The remaining solid is high-purity polyaluminum chloride. The crystalline aluminum chloride is pulverized using a pulverizer. The diameter of the pulverized crystalline aluminum chloride is 350μm. The pyrolysis and activation time of the crystalline aluminum chloride powder in the fluidized bed is 3 hours.

[0027] The method of use and working principle of this device: First, a cover plate is installed on one side of the sealing cover 14 via a hinge. The inner wall of the cover plate is engaged with the top of the preparation tank 12. When the device is in use, the required weight of aluminum sheets is calculated based on the volume of waste liquid processed in one operation. The cover plate on one side of the sealing cover 14 is opened, and the corresponding weight of aluminum sheets can be placed into the preparation tank 12. The aluminum sheets enter the mixing tank 15 through the gap between the pressure ring 151 and the guide plate 153. Acidic copper chloride-containing waste etching liquid is added to the preparation tank 12 through the liquid inlet pipe 11. The height of the waste liquid is lower than the top of the mixing tank 15. At this time, the lowest point of the waste liquid level is located at the bottom of the inner cavity of the collection hopper 13. Since the bottom and side walls of the mixing tank 15 are provided with through holes, the waste liquid can enter the mixing tank 15 through the through holes and come into contact with the aluminum sheets. The pressure ring 151 and the guide plate 153 can shield the top of the mixing tank 15 to prevent the aluminum sheets from overflowing from the mixing tank 15. As the reaction proceeds, the liquid level gradually decreases, thus ensuring that the aluminum sheets are always inside the mixing tank 15. The stirring shaft 52 is driven to rotate by the geared motor 51. The stirring blades 54 rotate with the stirring shaft 52 to stir the aluminum sheets, changing the distribution position of the aluminum sheets inside the mixing tank 15. Since the stirring shaft 52 and the cam 61 are coaxially connected, the cam 61 can rotate synchronously when the stirring shaft 52 rotates. When the larger diameter part of the cam 61 contacts one side of the guide rod 64, it can drive the guide rod 64 to move away from the stirring shaft 52. At this time, the bottom of the guide rod 64 moves along the support plate 53. The slide rod 68 guides the movement of the guide rod 64. When the guide rod 64 moves, one spring 67 is compressed and the other spring 67 is stretched. The adjusting block 62 moves synchronously with the guide rod 64, and the top of the contact head 65... The adjustment block 62 is hemispherical, and the arc groove at the bottom of the adjustment block 62 will not interfere with the movement of the contact head 65. When the adjustment block 62 is used to press the contact head 65, a downward force can be applied to the contact head 65, thereby driving the contact head 65 and the guide member 63 to move down. The guide member 63 slides inside the guide seat 69, and the spring 66 is compressed until the bottom of the contact head 65 overlaps with the top of the support plate 53. At this time, the guide member 63 moves down to the lowest point, completing the entire descent process. Since a crossbar is installed on one side of the guide member 63 and the inner rod of the telescopic rod 154, when the guide member 63 moves down, the inner rod can be driven to move down synchronously, thereby driving the pressure ring 151 and the guide plate 153 to move down, and the aluminum sheet is pressed by the pressing member 152. During the rotation of cam 61 to the smaller diameter end, the side wall of cam 61 separates from guide rod 64. At this time, the compressed spring 66 and spring 67 are stretched, the adjusting block 62 and contact head 65 are reset, and the guide 63 and pressure ring 151 move up to the initial position, realizing the reset of pressure ring 151, pressing part 152 and guide plate 153. Through stirring and squeezing, the copper powder residue on the aluminum sheet surface can be reduced, and the waste liquid can fully contact and react with the aluminum sheet. After the reaction, the liquid with copper powder is collected in collection hopper 13. Open the valve on the drainage pipe 131, and the liquid can be sent into filter box 31 through drainage pipe 131 and guide pipe 4. Then the mixed solution is filtered by filter screen 32, and the copper powder remains on filter screen 32. The remaining liquid is discharged through drain pipe 33. Open the sealing plate on one side of filter box 31, and the filter screen 32 can be removed from filter box 31, which facilitates the rapid collection of copper powder.

[0028] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An apparatus for preparing high-purity copper powder and polyaluminum chloride from acidic etching waste liquid, comprising a support base (2), wherein a reaction assembly (1) is disposed on the top of the support base (2), characterized in that: The reaction assembly (1) includes a preparation tank (12), a sealing cap (14), and a telescopic rod (154). A liquid inlet pipe (11) is fixedly connected to one side of the preparation tank (12). A sealing cap (14) is fixedly connected to the top of the preparation tank (12). A mixing tank (15) is fixedly connected to one side of the inner wall of the preparation tank (12). A pressure ring (151) is slidably connected to the inner wall of the mixing tank (15). A guide plate (153) is fixedly connected to the inner ring surface of the pressure ring (151). A pressing component (152) is fixedly connected to the bottom of the pressure ring (151). The top of the pressure ring (151) is fixedly connected to the bottom end of the telescopic rod (154). The telescopic rod (154) is a telescopic structure with an inner rod and an outer rod sleeved together. A crossbar is fixedly connected to one side of the inner rod of the telescopic rod (154). The support base (2) is provided with an auxiliary mechanism (5) on its top. The auxiliary mechanism (5) includes a geared motor (51), a stirring shaft (52), and a support plate (53). One side of the geared motor (51) is fixedly connected to the sealing cover (14). One end of the output shaft of the geared motor (51) is fixedly connected to the stirring shaft (52). A stirring blade (54) is fixedly connected to the bottom of the stirring shaft (52). The stirring shaft (52) passes through the support plate (53) and the guide plate (153). A reciprocating mechanism (6) is provided on the top of the guide plate (153). (6) Includes a cam (61), a guide (63) and a guide rod (64). A stirring shaft (52) is inserted through the cam (61). An adjusting block (62) is fixedly connected to one end of the guide rod (64). A contact head (65) overlaps the bottom of the adjusting block (62). The bottom of the contact head (65) is fixedly connected to the guide (63). One side of the support plate (53) is fixedly connected to the inner wall of the preparation tank (12). One end of the guide rod (64) overlaps with the cam (61). The bottom of the cam (61) is rotatably connected to the support plate (53).

2. The equipment for preparing high-purity copper powder and polyaluminum chloride from acidic etching waste liquid according to claim 1, characterized in that: The guide member (63) is externally inserted with a guide seat (69), and a spring (66) is fixedly connected to the top of the guide seat (69). The other end of the spring (66) is fixedly connected to the bottom of the contact head (65).

3. The equipment for preparing high-purity copper powder and polyaluminum chloride from acidic etching waste liquid according to claim 2, characterized in that: The guide seat (69) is slidably connected to the guide member (63), and the top of the guide seat (69) is fixedly connected to the support plate (53).

4. The equipment for preparing high-purity copper powder and polyaluminum chloride from acidic etching waste liquid according to claim 1, characterized in that: The top of the support plate (53) is slidably connected to the guide rod (64). A slide rod (68) is inserted through the guide rod (64). One end of the slide rod (68) is fixedly connected to the inner wall of the support plate (53), and a spring (67) is sleeved on the outside of the slide rod (68).

5. The equipment for preparing high-purity copper powder and polyaluminum chloride from acidic etching waste liquid according to claim 1, characterized in that: The inner wall of the preparation tank (12) is fixedly connected to a collection hopper (13), the bottom of the collection hopper (13) is fixedly connected to a drainage pipe (131), and one end of the drainage pipe (131) is fixedly connected to a guide pipe (4).

6. The equipment for preparing high-purity copper powder and polyaluminum chloride from acidic etching waste liquid according to claim 1, characterized in that: The support base (2) is equipped with a filter assembly (3) on top. The filter assembly (3) includes a filter box (31), a filter screen (32) and a drain pipe (33). The inner wall of the filter box (31) is engaged with the filter screen (32). One end of the drain pipe (33) penetrates the side wall of the filter box (31). The top side wall of the filter box (31) is penetrated by a guide pipe (4).

7. An energy-saving co-production process for preparing high-purity copper powder and polyaluminum chloride from acidic etching waste liquid, characterized in that: An apparatus for preparing high-purity copper powder and polyaluminum chloride using the acidic etching waste liquid according to any one of claims 1-6, comprising the following steps: S1. Pretreatment of waste liquid: The collected acidic copper chloride-containing waste etching liquid is mixed with aluminum hydroxide and sent into the reaction tank. Hydrogen peroxide and flocculant are added to the reaction tank and stirred with a stirring device to make the flocculant and waste liquid fully mixed. Then, it is allowed to stand, and the resulting precipitate is quickly filtered. The separated waste liquid is discharged to complete the solid-liquid separation. S2, Preparation of high-purity copper powder: The pretreated waste liquid is sent into the preparation tank (12) through the inlet pipe (11). The mixing tank (15) contains aluminum sheets. The reaction between the aluminum sheets and the waste liquid is accelerated by stirring with the stirring blade (54) and processing with the pressing part (152). The waste liquid containing mixed copper powder is obtained in the preparation tank (12). The waste liquid enters the filter box (31) through the drainage pipe (131) and the guide pipe (4). After being filtered by the filter screen (32), the copper powder can be separated from the remaining solution. The collected copper powder is taken out, dried and cooled, and the preparation of copper powder is completed. S3, Preparation of crystalline aluminum chloride: The remaining solution in S2 is sent into the washing centrifuge through the drain pipe (33). The washing time and centrifugation rate are set. After the solution is washed and centrifuged, it is stored in the buffer tank. The solution in the buffer tank is sent into the reaction tank by the water pump. The top of the reaction tank is sealed and hydrogen chloride gas is introduced into the reaction tank so that the hydrogen chloride gas reacts with the solution to generate crystalline aluminum chloride. S4. Preparation of high-purity polyaluminum chloride: Set the crushing time of the pulverizer and use the pulverizer to crush the crystalline aluminum chloride generated in S3. Then, the crystalline aluminum chloride powder is subjected to fluidized bed pyrolysis and cyclone separation. After processing, aluminum chloride powder is formed. Then, the aluminum chloride powder is hydrolyzed and activated by an activator. After the powder is activated, it is filtered to separate solid and liquid, and the excess liquid is discharged. The remaining solid is high-purity polyaluminum chloride.

8. The energy-saving co-production process for preparing high-purity copper powder and polyaluminum chloride from acidic etching waste liquid according to claim 7, characterized in that: In step S3, the temperature of the reaction tank is 20-25°C, and the amount of hydrogen chloride gas introduced is 230-280L.

9. The energy-saving co-production process for preparing high-purity copper powder and polyaluminum chloride from acidic etching waste liquid according to claim 7, characterized in that: In step S4, crystalline aluminum chloride is pulverized using a pulverizer. The diameter of the pulverized crystalline aluminum chloride is 65-800 μm, and the crystalline aluminum chloride powder is pyrolyzed and activated in a fluidized bed for 0.4-4.5 h.

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