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

Abstract

The invention discloses equipment for preparing high-purity copper powder and polyaluminum chloride from acid etching waste liquid and an energy-saving co-production process of the equipment, and relates to the technical field of acid etching waste liquid recycling, the equipment comprises a supporting base, a reaction assembly is arranged at the top of the supporting base, and the reaction assembly comprises a preparation tank body, a sealing cover and a telescopic rod. According to the aluminum sheet extrusion device, the top of the pressing ring can be connected through the telescopic rod and the guide piece, the top of the guide piece is in lap joint with the adjusting block through the contact head, when the cam rotates, the guide rod can be driven to reciprocate on the top of the supporting plate, the guide piece can be driven to ascend and descend through the adjusting block, and therefore the use height of the pressing ring and the use height of the guide disc are adjusted, and aluminum sheets are extruded; the flow of the waste liquid inside and outside the mixing tank can be accelerated, and then the aluminum sheets are stirred through the stirring blades, so that the aluminum sheets fully contact and react with the waste liquid; and the filter screen is arranged in the filter box, copper powder in the waste liquid can be rapidly separated, copper powder residues in the waste liquid are reduced, and follow-up concentrated recovery of the copper powder is facilitated.

Description

Technical Field

[0001] The present invention relates to the technical field of recycling of acidic etching waste liquid, and specifically to an apparatus for preparing high-purity copper powder and polyaluminum chloride from acidic etching waste liquid and an energy-saving co-production process thereof. Background Art

[0002] An etching solution is a liquid used for engraving by eroding the characteristics of a material. There are various 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 the waste liquid and reduce resource waste.

[0003] When preparing copper powder from acidic etching waste liquid, aluminum sheets need to be put in to displace the copper powder. Since the volume of the waste liquid in the container is large, the aluminum sheets need to be put in batches. After the aluminum sheets are put into the container, they are in a stacked state, and some copper powder will adhere to the surface of the aluminum sheets, blocking the contact between the aluminum sheets and the waste liquid, thereby affecting the subsequent reaction of the aluminum sheets and reducing the displacement speed of the aluminum sheets. Summary of the Invention

[0004] The purpose of the present invention is to provide an apparatus for preparing high-purity copper powder and polyaluminum chloride from acidic etching waste liquid and an energy-saving co-production process thereof, so as to solve the problem that after the aluminum sheets are put into the container, they are in a stacked state, and some copper powder will adhere to the surface of the aluminum sheets, blocking the contact between the aluminum sheets and the waste liquid, thereby affecting the subsequent reaction of the aluminum sheets and reducing the displacement speed of the aluminum sheets as proposed in the above background art.

[0005] To achieve the above purpose, the present invention provides the following technical solution: An apparatus for preparing high-purity copper powder and polyaluminum chloride from acidic etching waste liquid, including a support base. A reaction assembly is arranged on the top of the support base. The reaction assembly includes a preparation tank body, a sealing cover, and a telescopic rod. One end of the liquid inlet pipe is fixedly communicated with the preparation tank body. The sealing cover is fixedly connected to the top of the preparation tank body. One side of the inner wall of the preparation tank body is fixedly connected with a mixing tank. A pressure ring is slidably connected to the inner wall of the mixing tank. A guiding disk is fixedly connected to the inner circumferential surface of the pressure ring. A pressing member is fixedly connected to the bottom of the pressure ring, and the top of the pressure ring is fixedly connected to the bottom end of the telescopic rod. The telescopic rod is a telescopic structure with an inner rod and an outer rod sleeved. A cross bar is 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 reduction motor, a stirring shaft, and a support plate. One side of the reduction motor is fixedly connected to the sealing cover. One end of the output shaft of the reduction 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 guiding disk. A reciprocating mechanism is provided on the top of the guiding disk. The reciprocating mechanism includes a cam, a guiding member, and a guiding rod. The stirring shaft is inserted through the inside of the cam. One end of the guiding rod is fixedly connected to an adjusting block. A contact head is lapped at the bottom of the adjusting block. The bottom of the contact head is fixedly connected to the guiding member.

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

[0007] Preferably, the guiding seat is slidably connected to the guiding member. The top of the guiding seat is fixedly connected to the support plate. 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 guiding rod. A sliding rod is inserted through the inside of the guiding rod. One end of the sliding rod is fixedly connected to the inner wall of the support plate. And a second spring is sleeved on the outside of the sliding rod.

[0009] Preferably, one end of the guiding rod is lapped with the cam. The bottom of the cam is rotatably connected to the support plate.

[0010] Preferably, a collecting hopper is fixedly connected to the inner wall of the preparation tank. A drainage pipe is fixedly connected to the bottom of the collecting hopper. One end of the drainage pipe is fixedly connected to a guiding pipe.

[0011] Preferably, a filtering component is installed on the top of the support base. The filtering component includes a filtering box, a filter screen, and a liquid discharge pipe. The inner wall of the filtering box is engaged with the filter screen. One end of the liquid discharge pipe passes through the side wall of the filtering box. The top side wall of the filtering box is penetrated by the guiding pipe.

[0012] The energy-saving co-production process of the equipment for preparing high-purity copper powder and polyaluminum chloride from acidic etching waste liquid includes the following steps: S1. Pretreat the waste liquid: Mix the collected acidic copper chloride-containing etching waste liquid with aluminum hydroxide, send it into the reaction tank, add hydrogen peroxide and a flocculant to the reaction tank, use a stirring device to stir, so that the flocculant is fully mixed with the waste liquid, then let it stand, quickly filter the generated precipitate, and discharge the separated waste liquid to complete solid-liquid separation; S2. Preparation of high-purity copper powder: The pretreated waste liquid is fed into the preparation tank through the liquid inlet pipe. Aluminum sheets are placed inside the mixing tank. Through the stirring of the stirring blades and the treatment of the aluminum sheets by the pressing parts, the reaction between the aluminum sheets and the waste liquid can be accelerated. 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 the guiding pipe. After being filtered 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 crystal aluminum chloride: The remaining solution in S2 is fed into the washing centrifuge through the drain pipe. The washing time and the centrifugation rate are set. After the solution is washed and centrifuged, it is stored in the buffer cylinder. The solution in the buffer cylinder is pumped 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 to generate crystal aluminum chloride; S4. Preparation of high-purity polyaluminum chloride: Set the crushing time of the crusher. Use the crusher to crush the crystal aluminum chloride generated in S3. Then, the crystal aluminum chloride powder is subjected to fluidized bed pyrolysis and cyclone separation. After treatment, aluminum chloride powder is formed. Then, the aluminum chloride powder is hydrolyzed and activated by an activator. After the powder is activated, it is separated by a solid-liquid separation through a filtering device, and the excess liquid is discharged. The remaining solid is high-purity polyaluminum chloride.

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

[0014] Preferably, in the step S4, the crystal aluminum chloride is crushed by a crusher. The diameter of the crushed crystal aluminum chloride is 65 - 800 μm, and the pyrolysis activation time of the crystal 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 the present invention, the top of the pressing ring can be connected by using the telescopic rod and the guiding member. The top of the guiding member is lapped with the adjusting block through the contact head. When the cam rotates, it can drive the reciprocating movement of the guiding rod on the top of the support plate. The adjusting block can be used to drive the lifting of the guiding member, so as to adjust the use height of the pressing ring and the guiding disc, realize the extrusion of the aluminum sheet, and also accelerate the flow of the waste liquid inside and outside the mixing tank. Then, the aluminum sheet is stirred by the stirring blade to make the aluminum sheet fully contact and react with the waste liquid, so as to ensure the reaction of the aluminum sheet later, improve the replacement speed of the aluminum sheet, and improve the use efficiency of the whole device.

[0016] 2. In the present invention, a cross bar is installed on the inner wall of the support plate. The cross bar can be used to guide the movement of the guide rod, thereby improving the stability of the guide rod during movement. The compression and stretching of the second spring can drive the subsequent reset of the guide rod and the contact head, 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 communicated with the drainage pipe. The waste liquid after the reaction can be collected and sent into the guide pipe through the drainage pipe to achieve the diversion of the waste liquid. The filter screen is arranged inside the filter box, which can quickly separate the copper powder in the waste liquid and reduce the copper powder residue in the waste liquid. The filter screen is detachable, facilitating the subsequent centralized recovery of the copper powder.

[0017] 3. In the present invention, the treated solution can be discharged through the drain pipe. After washing and centrifuging, the solution can be separated and processed again. The solution is sent into the reaction tank, and then hydrogen chloride gas is introduced, which can improve the crystallization rate of aluminum chloride in the reaction tank, thereby obtaining crystalline aluminum chloride. Through the pyrolysis activation method, 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 entire operation process has a simple process, low energy consumption, and good energy conservation and environmental protection effects. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0019] In the figure: 1. Reaction component; 11. Liquid inlet pipe; 12. Preparation tank body; 13. Collection hopper; 131. Drainage pipe; 14. Sealing cover; 15. Mixing tank; 151. Pressing ring; 152. Pressing component; 153. Guide plate; 154. Telescopic rod; 2. Support base; 3. Filtering component; 31. Filter box; 32. Filter screen; 33. Drainage pipe; 4. Guide pipe; 5. Auxiliary mechanism; 51. Reduction motor; 52. Stirring shaft; 53. Support plate; 54. Stirring blade; 6. Reciprocating mechanism; 61. Cam; 62. Adjusting block; 63. Guide piece; 64. Guide rod; 65. Contact head; 66. First spring; 67. Second spring; 68. Slide bar; 69. Guide seat. Specific implementation mode

[0020] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0021] Embodiment 1: Refer to Figure 1-8 As shown in the figure: The 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 arranged on the top of the support base 2. The reaction component 1 includes a preparation tank body 12, a sealing cover 14 and a telescopic rod 154. One end of the liquid inlet pipe 11 is fixedly communicated with the preparation tank body 12. A sealing cover 14 is fixedly connected to the top of the preparation tank body 12. One side of the inner wall of the preparation tank body 12 is fixedly connected with a mixing tank 15. A pressing 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 pressing ring 151. A pressing component 152 is fixedly connected to the bottom of the pressing ring 151. And the top of the pressing 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. A cross bar is fixedly connected to one side of the inner rod of the telescopic rod 154; An auxiliary mechanism 5 is arranged on the top of the support base 2. The auxiliary mechanism 5 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. One end of the output shaft of the reduction 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 arranged on the top of the guide plate 153. The reciprocating mechanism 6 includes a cam 61, a guide piece 63 and a guide rod 64. The cam 61 is internally penetrated and inserted with the stirring shaft 52. One end of the guide rod 64 is fixedly connected to an adjusting block 62. A contact head 65 is lapped at the bottom of the adjusting block 62. The bottom of the contact head 65 is fixedly connected to the guide piece 63.

[0022] A guide seat 69 is inserted through the outside of the guide member 63. A first spring 66 is fixedly connected to the top of the guide seat 69. The other end of the first spring 66 is fixedly connected to the bottom of the contact head 65. The guide seat 69 is slidably connected to the guide member 63. 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 body 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 second spring 67 is sleeved on the outside of the slide rod 68. One end of the guide rod 64 abuts against the cam 61. The bottom of the cam 61 is rotatably connected to the support plate 53.

[0023] In this embodiment, the pre-treated acidic etching waste liquid can be sent into the preparation tank body 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 body 12, so that the stable installation and use of the mixing tank 15 inside the preparation tank body 12 can be realized. The pressing ring 151 is fixedly connected to the pressing member 152, so that the synchronous lifting of the pressing ring 151 and the pressing member 152 can be realized. The inner rod and the outer rod of the telescopic rod 154 are slidably connected, and the overall length of the telescopic rod 154 can be adjusted to adapt to the height change of the pressing ring 151. Since one side of the inner rod of the telescopic rod 154 is fixedly connected to the guide member 63 through a cross bar, the synchronous lifting of the guide member 63 and the inner rod can be realized, ensuring the synchronous lifting of both sides of the pressing ring 151, thereby improving the stability of the lifting of the pressing ring 151; The reduction motor 51 can be used to drive the stirring shaft 52 to rotate, and then drive the stirring blades 54 to rotate through the stirring shaft 52 to realize the stirring of the aluminum sheets, change the positions of the aluminum sheets inside the mixing tank 15, accelerate the movement of the aluminum sheets, thereby reducing the adhesion of copper powder on the surface of the aluminum sheets, and further reducing the shielding of the surface of the aluminum sheets by the copper powder. Since the stirring shaft 52 passes through the cam 61, the cam 61 can rotate with the cam 61 when the stirring shaft 52 rotates. The diameters of both ends of the cam 61 are different. Therefore, when the larger diameter end contacts the guide rod 64, the guide rod 64 can be driven to move to one side. When the guide rod 64 moves, the bottom of the guide rod 64 is engaged in the card slot on the top of the support plate 53. The card slot and the slide rod 68 can guide the movement of the guide rod 64, so as to drive 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, one side of the second spring 67 can be driven to be compressed. Therefore, when the cam 61 no longer contacts the guide rod 64, the compressed second spring 67 tends to reset, and then the reset movement of the guide rod 64 can be realized, so that the guide rod 64 returns to the initial position, facilitating the subsequent repeated use of the guide rod 64 and realizing the reciprocating drive of the adjusting block 62; An arc-shaped groove is provided at the bottom of the adjusting block 62, and the top of the contact head 65 is hemispherical. Therefore, when the adjusting block 62 moves, a downward force can be exerted on the contact head 65, driving the contact head 65 and the guide member 63 to move downward, realizing the adjustment of the use height of the guide member 63. When the guide member 63 moves up and down, the guide seat 69 can guide the guide member 63. The first spring 66 is installed between the contact head 65 and the guide seat 69. When the contact head 65 moves downward, the first spring 66 is compressed, so as to drive the guide member 63 and the contact head 65 to move upward and reset by the elasticity of the first spring 66, realizing the reciprocating up and down movement of the guide member 63. When the guide member 63 moves downward, the pressing ring 151, the pressing member 152 and the guide disk 153 move up and down synchronously. The pressing member 152 is L-shaped, which can increase the contact area between the bottom of the pressing ring 151 and the aluminum sheet, thereby improving the extrusion effect on the aluminum sheet, and can also adjust the hydraulic pressure inside the mixing tank 15. Through the pressure difference generated by moving up and down, the movement of the waste liquid on both sides inside and outside the mixing tank 15 can be accelerated, so that the exchange of the waste liquid can be realized, enabling the waste liquid at different positions to come into full contact with the aluminum sheet and making the aluminum sheet react fully.

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

[0025] At the same time, the collecting hopper 13 can wrap and protect the bottom of the mixing tank 15, collecting the waste liquid and copper powder discharged through the side wall and bottom through holes of the mixing tank 15. The bottom of the collecting hopper 13 is communicated with the drain pipe 131, and the drain pipe 131 can assist in discharging the waste liquid collected inside the collecting hopper 13. Since the height of the guide pipe 4 is lower than that of the collecting hopper 13, after the valve on the drain pipe 131 is opened, the waste liquid can smoothly enter the guide pipe 4. The support base 2 can stably support the installation and use of the filtering box 31. The bottom of the guide pipe 4 penetrates through the top side wall of the filtering box 31, facilitating the feeding of the waste liquid into the filtering box 31. The filter screen 32 can filter the waste liquid, thereby realizing the rapid separation of the copper powder from the waste liquid and reducing the residue of the copper powder in the waste liquid. The filtered waste liquid enters the bottom cavity of the filtering box 31 and then is discharged through the drain pipe 33, facilitating the next treatment step of the waste liquid, thereby improving the utilization rate of the waste liquid and reducing the environmental pollution and resource waste caused by the random discharge of the waste liquid.

[0026] Example Three: The energy-saving co-production process of the equipment for preparing high-purity copper powder and polyaluminum chloride from acidic etching waste liquid includes the following steps: Step 1. Pretreat the waste liquid: Mix the collected acidic copper chloride-containing waste etching solution with aluminum hydroxide, send it into the reaction tank, add hydrogen peroxide and flocculant into the reaction tank, use the stirring equipment to stir, make the flocculant fully mix with the waste liquid, then let it stand, quickly filter the generated precipitate, discharge the separated waste liquid, and complete the solid-liquid separation; Step 2. Prepare high-purity copper powder: Send the pretreated waste liquid into the preparation tank body 12 through the liquid inlet pipe 11. Aluminum sheets are placed inside the mixing tank 15. Through the stirring of the stirring blade 54 and the treatment of the aluminum sheets by the pressing member 152, the reaction between the aluminum sheets and the waste liquid can be accelerated. Obtain the waste liquid of mixed copper powder in the preparation tank body 12. The waste liquid enters the filter box 31 through the drainage pipe 131 and the guiding pipe 4. After being filtered by the filter screen 32, the copper powder can be separated from the remaining solution. Take out the collected copper powder, dry and cool the copper powder, and complete the preparation of copper powder; Step 3. Prepare crystal aluminum chloride: Send the remaining solution in Step 2 into the washing centrifuge through the drain pipe 33, set the washing time and centrifugation rate. After the solution is washed and centrifuged, it is stored in the buffer cylinder. Use a water pump to send the solution in the buffer cylinder into the reaction tank, seal the top of the reaction tank, and introduce hydrogen chloride gas into the reaction tank to make the hydrogen chloride gas react with the solution to generate crystal aluminum chloride. The temperature of the reaction tank is 25 °C, and the amount of hydrogen chloride gas introduced is 260 L; Step 4. Prepare high-purity polyaluminum chloride: Set the crushing duration of the crusher, use the crusher to crush the crystal aluminum chloride generated in Step 3, then perform fluidized bed pyrolysis and cyclone separation on the crystal aluminum chloride powder. After treatment, it forms aluminum chloride powder. Then use an activator to hydrolyze and activate the aluminum chloride powder. After the powder is activated, it is separated by solid-liquid separation through a filtering device, and the excess liquid is discharged. The remaining solid is high-purity polyaluminum chloride. Use the crusher to crush the crystal aluminum chloride. The diameter of the crushed crystal aluminum chloride is 350 μm, and the pyrolysis activation time of the crystal aluminum chloride powder in the fluidized bed is 3 h.

[0027] Usage method and working principle of the present device: First, a cover plate is installed on one side of the sealing cover 14 through a hinge, and the inner wall of the cover plate is clamped with the top of the preparation tank body 12. When the entire device is in use, calculate the weight of aluminum sheets required according to the volume of waste liquid to be processed at one time. Open the cover plate on one side of the sealing cover 14, and corresponding weight of aluminum sheets can be put into the preparation tank body 12. The aluminum sheets enter the mixing tank 15 through the gap between the pressing ring 151 and the guiding disc 153. Add acidic copper chloride-containing waste etching waste liquid into the interior of the preparation tank body 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 inner cavity bottom of the collecting hopper 13. Since through holes are provided at the bottom and side walls of the mixing tank 15, the waste liquid can enter the mixing tank 15 through the through holes to contact with the aluminum sheets. The pressing ring 151 and the guiding disc 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 progresses, the liquid level height gradually decreases, so it can be ensured that the aluminum sheets are always inside the mixing tank 15; Use the reduction motor 51 to drive the stirring shaft 52 to rotate. The stirring blades 54 rotate with the stirring shaft 52 to stir the aluminum sheets and change the distribution position of the aluminum sheets inside the mixing tank 15. Since the stirring shaft 52 and the cam 61 are coaxially connected, when the stirring shaft 52 rotates, the cam 61 can rotate synchronously. When the larger-diameter part of the cam 61 contacts one side of the guiding rod 64, it can drive the guiding rod 64 to move away from the stirring shaft 52. At this time, the bottom of the guiding rod 64 moves along the support plate 53, and the sliding rod 68 guides the movement of the guiding rod 64. When the guiding rod 64 moves, one of the second springs 67 is compressed and the other second spring 67 is stretched. The adjusting block 62 moves synchronously with the guiding rod 64. The top of the contact head 65 is hemispherical, and the arc-shaped groove opened at the bottom of the adjusting block 62 will not interfere with the movement of the contact head 65. When the adjusting block 62 squeezes the contact head 65, a downward force can be applied to the contact head 65, thereby driving the contact head 65 and the guiding member 63 to move downward. The guiding member 63 slides inside the guiding seat 69, and the first 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 guiding member 63 moves down to the lowest point, completing the entire downward movement process. Since a cross bar is installed on one side of the inner rod of the guiding member 63 and the telescopic rod 154, when the guiding member 63 moves downward, it can drive the synchronous downward movement of the inner rod, thereby driving the pressing ring 151 and the guiding disc 153 to move downward, and using the pressing member 152 to squeeze the aluminum sheets; During the rotation of the cam 61 to the end with a smaller diameter, the side wall of the cam 61 separates from the guide rod 64. At this time, the compressed first spring 66 and second spring 67 are stretched, the adjusting block 62 and the contact head 65 are reset, and the guide member 63 and the retaining ring 151 move up to the initial position, realizing the reset of the retaining ring 151, the pressing member 152, and the guide disc 153. By stirring and squeezing, the residue of copper powder on the aluminum sheet can be reduced, enabling the waste liquid to fully contact and react with the aluminum sheet. After the reaction, the liquid with copper powder is collected in the collection hopper 13. By opening the valve on the drainage pipe 131, the liquid can be sent into the filter box 31 through the drainage pipe 131 and the guide pipe 4. Then, the mixed solution is filtered by the filter screen 32, and the copper powder remains on the filter screen 32. The remaining liquid is discharged through the drain pipe 33. By opening the sealing plate on one side of the filter box 31, the filter screen 32 can be taken out from the filter box 31, thus facilitating 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 perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. Equipment for preparing high-purity copper powder and polyaluminum chloride from acidic etching waste liquid, including a support base (2), wherein a reaction assembly (1) is arranged on the top of the support base (2), and is characterized in that: The reaction component (1) includes a preparation tank body (12), a sealing cover (14) and a telescopic rod (154). One side of the preparation tank body (12) is fixedly communicated with a liquid inlet pipe (11). The top of the preparation tank body (12) is fixedly connected with a sealing cover (14). One side of the inner wall of the preparation tank body (12) is fixedly connected with a mixing tank (15). A pressure ring (151) is slidably connected to the inner wall of the mixing tank (15). A guide disc (153) is fixedly connected to the inner ring surface of the pressure ring (151). A pressing member (152) is fixedly connected to the bottom of the pressure ring (151). And the top of the pressure ring (151) is fixedly connected with 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. A cross bar is fixedly connected to one side of the inner rod of the telescopic rod (154). An auxiliary mechanism (5) is arranged on the top of the support base (2). The auxiliary mechanism (5) includes a reduction motor (51), a stirring shaft (52) and a support plate (53). One side of the reduction motor (51) is fixedly connected with the sealing cover (14). One end of the output shaft of the reduction motor (51) is fixedly connected with the stirring shaft (52). A stirring blade (54) is fixedly connected to the bottom of the stirring shaft (52). The stirring shaft (52) penetrates through the support plate (53) and the guide disc (153). A reciprocating mechanism (6) is arranged on the top of the guide disc (153). The reciprocating mechanism (6) includes a cam (61), a guide member (63) and a guide rod (64). The stirring shaft (52) is inserted through the inside of the cam (61). One end of the guide rod (64) is fixedly connected with an adjusting block (62). A contact head (65) is lapped at the bottom of the adjusting block (62). The bottom of the contact head (65) is fixedly connected with the guide member (63).

2. The equipment for preparing high-purity copper powder and polyaluminum chloride from acidic etching waste liquid according to claim 1, characterized in that: A guide seat (69) is inserted through the outside of the guide member (63). A first spring (66) is fixedly connected to the top of the guide seat (69). The other end of the first spring (66) is fixedly connected with 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, wherein: The guide seat (69) is slidably connected with the guide member (63). The top of the guide seat (69) is fixedly connected with the support plate (53). One side of the support plate (53) is fixedly connected with the inner wall of the preparation tank body (12).

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

5. The equipment for preparing high-purity copper powder and polyaluminum chloride from acidic etching waste liquid according to claim 4, characterized in that: One end of the guide rod (64) is lapped with the cam (61). The bottom of the cam (61) is rotatably connected with the support plate (53).

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

7. The equipment for preparing high-purity copper powder and polyaluminum chloride from acidic etching waste liquid according to claim 1, characterized in that: A filter assembly (3) is mounted 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 snap-connected to the filter screen (32). One end of the drain pipe (33) penetrates through the side wall of the filter box (31), and the top side wall of the filter box (31) is penetrated by a guide pipe (4).

8. Energy-saving co-production process for equipment for preparing high-purity copper powder and polyaluminum chloride from acidic etching waste liquor, characterized in that: The equipment for preparing high-purity copper powder and polyaluminum chloride using the acidic etching waste liquid described in any one of claims 1-7 includes the following steps: S1. Pretreat the waste liquid: Mix the collected acidic copper chloride-containing waste etching solution with aluminum hydroxide, send it into a reaction tank, add hydrogen peroxide and a flocculant into the reaction tank, use a stirring device to stir, so that the flocculant is fully mixed with the waste liquid, then let it stand, quickly filter the generated precipitate, and discharge the separated waste liquid to complete solid-liquid separation; S2. Preparation of high-purity copper powder: Send the pretreated waste liquid into a preparation tank body (12) through a liquid inlet pipe (11). Aluminum sheets are placed inside a mixing tank (15). Through the stirring of a stirring blade (54) and the treatment of the aluminum sheets by a pressing member (152), the reaction between the aluminum sheets and the waste liquid can be accelerated. The waste liquid for obtaining mixed copper powder is in the preparation tank body (12). The waste liquid enters the filter box (31) through a drainage pipe (131) and a guide pipe (4). After being filtered by the filter screen (32), the copper powder can be separated from the remaining solution. Take out the collected copper powder, dry and cool the copper powder to complete the preparation of the copper powder; S3. Preparation of crystal aluminum chloride: Send the remaining solution in S2 into a washing centrifuge through a drain pipe (33), set the washing time and the centrifugation rate. After the solution is washed and centrifuged, it is stored in a buffer cylinder. Use a water pump to send the solution in the buffer cylinder into a reaction tank, seal the top of the reaction tank, and introduce hydrogen chloride gas into the reaction tank to make the hydrogen chloride gas react with the solution to generate crystal aluminum chloride; S4. Preparation of high-purity polyaluminum chloride: Set the crushing time of a crusher, use the crusher to crush the crystal aluminum chloride generated in S3, then perform fluidized bed pyrolysis and cyclone separation on the crystal aluminum chloride powder. After treatment, aluminum chloride powder is formed. Then use an activator to hydrolyze and activate the aluminum chloride powder. After the powder is activated, solid-liquid separation is performed through a filtering device, and the excess liquid is discharged. The remaining solid is high-purity polyaluminum chloride.

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

10. Energy-saving co-production process of equipment for preparing high-purity copper powder and polyaluminum chloride from acidic etching waste liquid, characterized in that: In the step S4, use a crusher to crush the crystal aluminum chloride. The diameter of the crystal aluminum chloride after crushing is 65-800 μm, and the pyrolysis activation time of the crystal aluminum chloride powder in the fluidized bed is 0.4-4.5 h.

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