CN114990645B - Copper sulfate crystal recovery device and method - Google Patents
Copper sulfate crystal recovery device and method Download PDFInfo
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- CN114990645B CN114990645B CN202210771737.8A CN202210771737A CN114990645B CN 114990645 B CN114990645 B CN 114990645B CN 202210771737 A CN202210771737 A CN 202210771737A CN 114990645 B CN114990645 B CN 114990645B
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- copper sulfate
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- tank body
- filtering
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- ARUVKPQLZAKDPS-UHFFFAOYSA-L copper(II) sulfate Chemical compound [Cu+2].[O-][S+2]([O-])([O-])[O-] ARUVKPQLZAKDPS-UHFFFAOYSA-L 0.000 title claims abstract description 141
- 229910000365 copper sulfate Inorganic materials 0.000 title claims abstract description 139
- 239000013078 crystal Substances 0.000 title claims abstract description 110
- 238000011084 recovery Methods 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000001914 filtration Methods 0.000 claims abstract description 75
- 239000011888 foil Substances 0.000 claims abstract description 49
- 239000003792 electrolyte Substances 0.000 claims abstract description 31
- 238000004064 recycling Methods 0.000 claims abstract description 13
- 238000010438 heat treatment Methods 0.000 claims abstract description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 51
- 239000012535 impurity Substances 0.000 claims description 19
- 239000002245 particle Substances 0.000 claims description 16
- 238000004891 communication Methods 0.000 claims description 11
- 238000005303 weighing Methods 0.000 claims description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 abstract description 11
- 239000011889 copper foil Substances 0.000 abstract description 6
- 239000000243 solution Substances 0.000 description 85
- 239000007788 liquid Substances 0.000 description 10
- 238000010586 diagram Methods 0.000 description 9
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 6
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 6
- 229910052802 copper Inorganic materials 0.000 description 5
- 239000010949 copper Substances 0.000 description 5
- 238000004090 dissolution Methods 0.000 description 5
- 230000009471 action Effects 0.000 description 3
- 230000005684 electric field Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000004381 surface treatment Methods 0.000 description 3
- JPVYNHNXODAKFH-UHFFFAOYSA-N Cu2+ Chemical compound [Cu+2] JPVYNHNXODAKFH-UHFFFAOYSA-N 0.000 description 2
- 230000005587 bubbling Effects 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 229910001431 copper ion Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000012938 design process Methods 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000004659 sterilization and disinfection Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 238000004448 titration Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D1/00—Electroforming
- C25D1/04—Wires; Strips; Foils
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D21/00—Processes for servicing or operating cells for electrolytic coating
- C25D21/06—Filtering particles other than ions
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D21/00—Processes for servicing or operating cells for electrolytic coating
- C25D21/16—Regeneration of process solutions
- C25D21/18—Regeneration of process solutions of electrolytes
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Abstract
The application relates to the technical field of electrolytic copper foil, in particular to a copper sulfate crystal recovery device and a copper sulfate crystal recovery method, wherein the copper sulfate crystal recovery device is used for being connected with a raw foil machine set and comprises a first groove body, the first groove body is communicated with the raw foil machine set, the first groove body is used for containing a solution, the solution comprises copper sulfate crystals and copper sulfate electrolyte discharged by the raw foil machine set, and a solution for dissolving the copper sulfate crystals and the copper sulfate electrolyte, wherein the copper sulfate crystals do not contain organic matters; the pump body is communicated with the first groove body and is used for leading out the solution; the heat exchange device is communicated with the pump body and is used for heating and dissolving the solution; the filtering device is communicated with the heat exchange device and is used for filtering the dissolved solution and is selectively communicated with the first tank body; and the second groove body is communicated with the foil generating set, and the second groove body is selectively communicated with the filtering device. The application realizes the recycling and utilization of the copper sulfate crystal with oil stains.
Description
Technical Field
The application relates to the technical field of electrolytic copper foil, in particular to a copper sulfate crystal recycling device and method.
Background
Electrolytic copper foil is an important material for manufacturing Copper Clad Laminate (CCL), printed Circuit Board (PCB) and lithium ion battery, and is produced by a foil generating set. The foil generating set consists of a cathode roller and an anode groove. The anode groove is connected with the positive electrode of the power supply, the cathode roller is connected with the negative electrode of the power supply, an electric field is formed between the positive electrode and the negative electrode after the copper sulfate electrolyte enters the anode groove, copper ions migrate to the surface of the cathode roller and deposit under the action of the electric field, deposited copper is very thin and is stripped from the cathode roller and wound on the other roller, so that the copper sulfate electrolyte is continuously circulated, copper ions are continuously deposited to the cathode roller under the action of the electric field, and are continuously stripped and wound on the winding shaft.
In the process of electrolyzing the copper sulfate electrolyte, the copper sulfate solution is easily separated out copper sulfate crystals due to the influence of the problems of shutdown or too low temperature and the like, and the copper sulfate crystals generated by the pollution of the foil generating set are run, overflow, dripping and leakage, but the copper sulfate crystals are polluted and then contain organic matters such as greasy dirt and the like, so that the copper sulfate crystals cannot be recycled.
Disclosure of Invention
The application provides a copper sulfate crystal recycling device and method, and aims to recycle copper sulfate crystals.
In a first aspect, an embodiment of the present application provides a copper sulfate crystal recovery device, configured to be connected to a foil generating set, including; the first tank body is communicated with the foil generating set and is used for containing a solution, wherein the solution comprises copper sulfate crystals and copper sulfate electrolyte discharged by the foil generating set and a dissolving solution used for dissolving the copper sulfate crystals and the copper sulfate electrolyte, and the copper sulfate crystals do not contain organic matters; the pump body is communicated with the first groove body and is used for leading out the solution; the heat exchange device is communicated with the pump body and is used for heating and dissolving the solution; the filtering device is communicated with the heat exchange device and is used for filtering the dissolved solution, and the filtering device is selectively communicated with the first tank body; and a second tank in communication with the foil generating set, and in selective communication with the filter device.
In one embodiment of the application, the filtering device is communicated with the first tank body through a first pipeline, and the filtering device is communicated with the second tank body through a second pipeline; the first pipeline is provided with a first valve body, and the second pipeline is provided with a second valve body.
In one embodiment of the present application, the filtering apparatus includes: the first filter is communicated with the heat exchange device and is used for filtering impurities with the particle size of D 1 in the solution; and a second filter in communication with the first filter, the second filter for filtering impurities in the solution having a particle size D 2; wherein, D1 and D2 are required to satisfy the following conditions: d 1＞3D2.
In one embodiment of the present application, the first filter is a pocket filter, and the second filter is a precision filter.
In one embodiment of the present application, the first filter has a filtration accuracy of 5 μm and the second filter has a filtration accuracy of 1 μm.
In one embodiment of the present application, the second filter includes at least two, at least two of the second filters are disposed in parallel, and at least two of the second filters are each in communication with the first filter.
In one embodiment of the present application, the heat exchange device includes: a water heater; and the water inlet and the water outlet of the heat exchanger are communicated with the water heater, the water heater conveys hot water into the heat exchanger through the water inlet, so as to heat the solution, and cooled cold water is discharged back into the water heater through the water outlet.
In one embodiment of the application, the water heater is further communicated with the first tank body, so that hot water is introduced into the first tank body.
In a second aspect, a copper sulfate crystal recovery method, using the copper sulfate crystal recovery apparatus according to any one of the first aspects, comprises:
adding a solution into the first tank body through a foil generating unit, wherein the solution comprises copper sulfate crystals and copper sulfate electrolyte discharged by the foil generating unit after organic matters are removed, and a dissolving solution for dissolving the copper sulfate crystals and the copper sulfate electrolyte;
Opening a pump body and a heat exchange device, and heating the solution until copper sulfate crystals in the solution are dissolved;
Filtering the dissolved solution by a filtering device, and introducing the filtered solution into the first tank body or the second tank body;
Repeating the steps until the filtered solution is introduced into the second tank body, and introducing the solution in the second tank body into the foil generating set.
The step of filtering the dissolved solution by a filtering device and introducing the filtered solution into the first tank body or the second tank body comprises the following steps:
Acquiring a threshold value of the content of copper sulfate crystals;
Measuring the real-time copper sulfate crystal content in the solution;
when the real-time copper sulfate crystal content is lower than a threshold value, introducing the solution into the second tank body;
When the real-time copper sulfate crystal content is above a threshold, introducing the solution into the first tank.
According to the copper sulfate crystal recovery device and the copper sulfate crystal recovery method provided by the embodiment of the application, the first tank body, the pump body, the heat exchange device and the filtering device are sequentially communicated, the filtering device is selectively communicated with the first tank body or the second tank body, the foil generating set is respectively and selectively communicated with the first tank body and the second tank body, the polluted copper sulfate crystal discharged by the foil generating set is sent into the first tank body after being manually collected, the leaked liquid (namely copper sulfate electrolyte) generated by the running, bubbling, dripping and leaking of the foil generating set is discharged into the first tank body and is removed by organic matters, and then the dissolving liquid is added into the first tank body.
Drawings
Features, advantages, and technical effects of exemplary embodiments of the present application will be described below with reference to the accompanying drawings. In the drawings, like parts are designated with like reference numerals. The drawings are not drawn to scale, but are merely for illustrating relative positional relationships, and the layer thicknesses of certain portions are exaggerated in order to facilitate understanding, and the layer thicknesses in the drawings do not represent the actual layer thickness relationships.
FIG. 1 is a partial block diagram of a copper sulfate crystal recycling apparatus according to a first embodiment of the present application;
FIG. 2 is a block diagram of a filtering apparatus;
FIG. 3 is a block diagram of a heat exchange device;
FIG. 4 is an overall block diagram of a copper sulfate crystal recovery process according to a second embodiment of the present application;
Fig. 5 is a flow chart of a method for recovering copper sulfate crystals according to a second embodiment of the present application.
Reference numerals illustrate:
1. A first tank body; 2. a pump body; 3. a heat exchange device; 31. a water heater; 32. a heat exchanger; 4. a filtering device; 41. a first filter; 42. a second filter; 5. a second tank body; 6. a first pipeline; 61. a first valve body; 7. a second pipeline; 71. a second valve body; 8. and a foil generating unit.
Detailed Description
Features and exemplary embodiments of various aspects of the application are described in detail below. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the application. It will be apparent, however, to one skilled in the art that the present application may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the application by showing examples of the application. In the drawings and the following description, at least some well-known structures and techniques have not been shown in detail in order not to unnecessarily obscure the present application; also, the size of the region structures may be exaggerated for clarity. Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.
The directional terms appearing in the following description are those directions shown in the drawings and do not limit the specific structure of the application. In the description of the present application, it should also be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be directly connected or indirectly connected. The specific meaning of the above terms in the present application can be understood as appropriate by those of ordinary skill in the art.
First embodiment
FIG. 1 is a partial block diagram of a copper sulfate crystal recycling apparatus according to a first embodiment of the present application; FIG. 2 is a block diagram of a filtering apparatus; FIG. 3 is a block diagram of a heat exchange device; fig. 4 is an overall block diagram of a copper sulfate crystal recovery method according to a second embodiment of the present application.
As shown in fig. 1-4, an embodiment of the present application proposes a copper sulfate crystal recovery device for connecting with a foil generating set 8, including; a first tank body 1, wherein the first tank body 1 is communicated with the foil generating set 8, the first tank body 1 is used for containing a solution, the solution comprises copper sulfate crystals and copper sulfate electrolyte discharged by the foil generating set 8, and a dissolving solution for dissolving the copper sulfate crystals and the copper sulfate electrolyte, and the copper sulfate crystals do not contain organic matters; the pump body 2 is communicated with the first groove body 1, and the pump body 2 is used for leading out the solution; the heat exchange device 3 is communicated with the pump body 2, and the heat exchange device 3 is used for heating and dissolving the solution; a filtering device 4, wherein the filtering device 4 is communicated with the heat exchange device 3, the filtering device 4 is used for filtering the dissolved solution, and the filtering device 4 is selectively communicated with the first tank body 1; and a second tank 5, the second tank 5 is communicated with the foil generating set 8, and the second tank 5 is selectively communicated with the filtering device 4.
According to the copper sulfate crystal recycling device provided by the embodiment of the application, the first tank body 1, the pump body 2, the heat exchange device 3 and the filtering device 4 are sequentially communicated, the filtering device 4 is selectively communicated with the first tank body 1 or the second tank body 5, the foil generating set 8 is selectively communicated with the first tank body 1 and the second tank body 5 respectively, and polluted copper sulfate crystals discharged by the foil generating set 8 are manually collected and then sent into the first tank body 1. The raw foil machine set 8 comprises a raw foil machine and a surface treatment machine, leakage liquid (namely copper sulfate electrolyte) generated by running, bubbling, dripping and leaking of the raw foil machine set 8 is discharged into the first tank body 1 and is subjected to organic matter removal, then, dissolved liquid is added, as the copper sulfate electrolyte has a certain temperature, the copper sulfate electrolyte is mixed with copper sulfate crystals and the dissolved liquid to form solution in the first tank body 1, the solution enters the heat exchange device 3 under the action of the pump body 2 to be further heated and fully dissolved, and then is filtered by the filtering device 4, and the filtered solution enters the second tank body 5 to be continuously utilized by the raw foil machine set 8 or enters the first tank body 1 to be continuously circulated and continuously dissolved and filtered, so that the direct recycling of the copper sulfate crystals with greasy dirt is realized, and the raw material cost is saved. The embodiment is based on the transformation of the existing bio-foil oxidation-preventing liquid supply system, and by utilizing the copper sulfate crystal recovery device, the month recovery amount of the copper sulfate crystal is more than 500Kg, so that waste materials can be fully recovered and utilized, and the cost is saved.
Wherein, the organic matters can be removed by hydrogen peroxide (hydrogen peroxide), which is an aqueous solution of hydrogen peroxide, is commonly used for sterilization and disinfection, and can eliminate the organic matters such as greasy dirt on the copper sulfate crystal.
It is known that the foil generating set 8 includes a foil generating machine and a surface treating machine, and copper sulfate crystals are polluted precipitated crystals and are collected manually. Because the concentration of the high-concentration leakage liquid of the copper sulfate electrolyte for the foil production machine and the surface treatment machine is close to saturation, the solution can be dissolved by introducing the solution into the first tank body 1, wherein the solution can be pure water, and the introducing mode can be a pure water pipe.
In a preferred embodiment, the first tank 1 is used for better containing the copper sulfate crystal and the copper sulfate electrolyte to be recycled, and the size of the first tank 1 is phi 1500mm (diameter) ×2000mm (height) =3.5 m 3; the pump body 2 has a lift of 30m and a delivery rate q=30m 3/h, so that the solution in the first tank 1 can be delivered to the heat exchange device 3.
For the on-off mode of the filtering device 4 and the first tank body 1 and the second tank body 5, the filtering device 4 is communicated with the first pipeline 6, and the filtering device 4 is communicated with the second tank body 5 through a second pipeline 7; the first valve body 61 is disposed on the first pipeline 6, and the second valve body 71 is disposed on the second pipeline 7. The first valve body 61 is an internal circulation valve, the second valve body 71 is a liquid supply valve, and specifically, the real-time copper sulfate crystal content in the solution can be measured, and when the real-time copper sulfate crystal content is lower than a threshold value, the solution is introduced into the second tank body 5 and then recycled by a foil producing machine; when the real-time copper sulfate crystal content is higher than a threshold value, introducing the solution into the first tank body 1 for circulating dissolution and filtration.
The method for detecting the content of the copper sulfate crystals in real time comprises the following steps: and filtering the solution in the pipeline passing through the filtering device 4, weighing the residual copper sulfate crystals on the filter paper after filtering, comparing the weight with a threshold value, introducing the solution into the first tank body 1 for continuous circulation if the weight is larger than the threshold value, and directly using the solution for preparing electrolytic copper foil by the foil generating unit 8 if the weight is smaller than the threshold value. Through the on-off mode and the judgment mode thereof, the copper sulfate crystal and the copper sulfate electrolyte after the organic matters are removed can be continuously heated for dissolution and filtration until the impurity content is lower than the threshold value, the low impurity rate of the recycled solution is ensured, the high-quality copper sulfate crystal is recycled, and the recycled solution can be directly used for preparing electrolytic copper foil by a foil generating unit 8.
As shown in fig. 2 and 4, for the specific structure of the filtering device 4, the filtering device 4 includes: a first filter 41, wherein the first filter 41 is communicated with the heat exchange device 3, and the first filter 41 is used for filtering impurities with the particle size D1 in the solution; and a second filter 42, the second filter 42 being in communication with the first filter 41, the second filter 42 being for filtering impurities of particle size D2 in the solution; wherein, D1 and D2 are required to satisfy the following conditions: d1 > 3D2. The solution is further heated and melted and then needs to be filtered to be recovered, the solution can be filtered in two steps in the filtering process, the first step of filtering is performed through a first filter 41, the first filter 41 is a coarse filter, specifically, the first filter 41 is a filter bag type filter, the inside of the filter bag type filter is supported by a metal basket to form a filter bag, liquid flows in from an inlet, flows out from an outlet after being filtered by the filter bag, impurities are intercepted in activated carbon of the filter bag, the filter bag can be continuously used after being replaced, and the filter bag type filter is mainly used for filtering large-particle impurities; the second step is that the second filter 42 is a fine filter, the second filter 42 is a precision filter, the precision filter (also called as security filter), the shell of the cylinder is generally made of stainless steel, tubular filter elements such as PP melt-blown, wire-burned, folded, titanium filter element, active carbon filter element and the like are adopted as filter elements, and different filter elements are selected according to different filter media and design processes so as to meet the requirements of effluent quality, and the filter is mainly used for filtering small-particle impurities, wherein the particle size of the large-particle impurities is D1, the particle size of the small-particle impurities is D2, and the two requirements are as follows: d1 > 3D2, specifically, the filtering precision of the first filter 41 is 5 μm, and the filtering precision of the second filter 42 is 1 μm, that is, the particle size of the large particle impurities is far greater than that of the small particle impurities, and the two-step filtration is performed to filter the impurities with different particle sizes respectively, so as to achieve better filtering effect.
For the first filter 41, a valve body is connected in parallel to the first filter 41 and is used for controlling whether the solution passes through the first filter 41, when the content of copper sulfate crystals in the solution is measured to be lower than a threshold value, the solution can be directly filtered through the second filter 42, and when the content of copper sulfate crystals in the solution is measured to be higher than the threshold value, the solution can be subjected to coarse filtration through the first filter 41 and then subjected to fine filtration through the second filter 42.
For the second filter 42, the second filter 42 includes at least two, at least two second filters 42 are arranged in parallel, and the water inlet portions of the at least two second filters 42 are connected in parallel and then are connected to the first filter 41 for communication, and the water outlet portions are connected in parallel and then are connected to the first pipeline 6 and the second pipeline 7. Here, valve bodies may be respectively connected to the pipes through which the plurality of second filters 42 communicate, for controlling the on-off of the individual filters, and controlling the plurality of second filters 42 to operate simultaneously or several or one of them according to the throughput of the solution.
By the control method of the first filter 41 and the second filter 42, whether the solution passes through the first filter 41 or not can be controlled according to the content of the copper sulfate crystal of the solution, and the solution passes through a plurality of second filters 42 can be controlled, so that the on-off can be controlled according to reasonable requirements, and the applicability is stronger.
As shown in fig. 3 and 4, for a specific structure of the heat exchange device 3, the heat exchange device 3 includes: a water heater 31; and a heat exchanger 32, wherein a water inlet and a water outlet of the heat exchanger 32 are communicated with the water heater 31, the water heater 31 conveys hot water into the heat exchanger 32 through the water inlet, so as to heat the solution, and cooled cold water is discharged back into the water heater 31 through the water outlet. Wherein the hot water temperature is 55 ℃, the cold water temperature is 50 ℃, and the heat exchanger 32 is a plate heat exchanger 32. The solution is introduced into the heat exchanger 32, hot water is introduced into the heat exchanger 32 to heat the solution, and the cooled water is introduced into the hot water heater 31 to be continuously heated. Further, the water heater 31 is also communicated with the first tank 1, so that hot water is introduced into the first tank 1. The water heater 31 may be connected to the first tank 1, and hot water may be added to the first tank 1 to raise the temperature, so that the copper sulfate crystal is better and faster dissolved in the copper sulfate electrolyte.
Second embodiment
FIG. 4 is an overall block diagram of a copper sulfate crystal recovery process according to a second embodiment of the present application; fig. 5 is a flow chart of a method for recovering copper sulfate crystals according to a second embodiment of the present application.
As shown in fig. 4 to 5, on the basis of the first embodiment, the present embodiment provides a copper sulfate crystal recovery method, which adopts the copper sulfate crystal recovery apparatus according to the first embodiment, and includes:
S1, adding a solution into the first tank body 1 through a foil generating unit 8, wherein the solution comprises copper sulfate crystals and copper sulfate electrolyte discharged by the foil generating unit 8 after organic matters are removed, and a dissolving solution for dissolving the copper sulfate crystals and the copper sulfate electrolyte;
S2, opening the pump body 2 and the heat exchange device 3, and heating the solution until copper sulfate crystals in the solution are dissolved;
S3, filtering the dissolved solution through a filtering device 4, and introducing the filtered solution into the first tank body 1 or the second tank body 5;
S4, repeating the steps until the filtered solution is introduced into the second tank body 5, and introducing the solution in the second tank body 5 into the foil generating set 8.
The method for recovering copper sulfate crystals provided in this embodiment is based on the copper sulfate crystal recovering apparatus of the first embodiment, so that the method has the same technical advantages as those of the first embodiment, and will not be described herein.
In the step S1, specifically, the method includes: copper dissolution, foil generation and surface treatment: under the condition that the copper sulfate crystals and the copper sulfate electrolyte collected by the foil generating set 8 are ensured to be free of foreign matters and oil dirt (oil dirt is removed after double oxidation water is added for reaction), the copper sulfate crystals and the copper sulfate electrolyte are introduced into the first tank body 1 for circulation, and the addition amount and the equipment operation condition are required to be confirmed before the copper sulfate crystals are added.
In the step S2, the solution may be heated until the copper sulfate crystals are completely dissolved.
In the step S3, that is, in the step of filtering the dissolved solution by the filtering device 4 and introducing the filtered solution into the first tank 1 or the second tank 5, it includes:
Acquiring a threshold value of the content of copper sulfate crystals;
Measuring the real-time copper sulfate crystal content in the solution;
introducing the solution into the second tank 5 when the real-time copper sulfate crystal content is below a threshold value;
when the real-time copper sulphate crystal content is above a threshold value, the solution is introduced into the first tank 1.
In the step of measuring the real-time copper sulfate crystal content in the solution, comprising: and taking a quantitative solution in the second tank body 5, filtering the quantitative solution, weighing the residual copper sulfate crystals on the filter paper after filtering, comparing the weight with a threshold value, introducing the solution into the first tank body 1 for continuous circulation if the weight is larger than the threshold value, and introducing the solution into the second tank body 5 for recycling if the weight is smaller than the threshold value. Through the on-off mode and the judging mode thereof, the disinfected copper sulfate crystal and the copper sulfate electrolyte can be continuously heated for dissolution and filtration until the impurity content is lower than a threshold value, the low impurity rate of the recycled solution is ensured, the high-quality recovery of the copper sulfate crystal is realized, and the recovered solution can be directly used for preparing electrolytic copper foil by a foil producing machine.
After the step S2-S4, further comprising: the test run was performed before first use, and the line was checked with hot water and cleaned. When in formal use, the active carbon (40 meshes) and the filter element (1 um) of the filter bag filter are replaced in advance, the temperature of hot water during dissolution is ensured, the operation control of the copper sulfate electrolyte circulation operation process is completed, the addition and the circulation highest liquid level of the first tank body 1 are formulated according to actual use conditions, dissolved copper is sampled, and the content (COD test method and acid titration method) and the impurity content of the copper sulfate electrolyte before and after circulation are respectively tested.
In all the steps, the on-site use condition, the replacement condition of the activated carbon and the filter bag, the copper dissolving and foil producing machine and the laboratory are used for jointly making a copper sulfate crystal recovery flow and a filter use period standardized operation, and the laboratory is used for jointly making the requirements of measurement and control of the recovered copper sulfate electrolyte.
In addition, the height of the polluted solution recovered in the first tank body 1 is not more than 100cm, circulation is started around 100cm, and the subsequent adjustment is carried out according to the actual situation; the safety is paid when the copper sulfate crystal is added, and the copper sulfate crystal is added in a small amount as much as possible, so that the splashing is prevented, and the sanitation condition of the peripheries of the first tank body 1 and the second tank body 5 is ensured.
It should be readily understood that the terms "on … …", "above … …" and "above … …" in this disclosure should be interpreted in the broadest sense so that "on … …" means not only "directly on something" but also includes "on something" with intermediate features or layers therebetween, and "above … …" or "above … …" includes not only the meaning "on something" or "above" but also the meaning "above something" or "above" without intermediate features or layers therebetween (i.e., directly on something).
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the application.
Claims (9)
1. A copper sulfate crystal recovery method, characterized in that the copper sulfate crystal recovery method comprises:
adding a solution into the first tank body through the foil generating unit, wherein the solution comprises copper sulfate crystals and copper sulfate electrolyte discharged by the foil generating unit after organic matters are removed, and a dissolving solution for dissolving the copper sulfate crystals and the copper sulfate electrolyte;
opening a pump body and a heat exchange device, and heating the solution until copper sulfate crystals in the solution are completely dissolved;
Filtering the dissolved solution by a filtering device, and introducing the filtered solution into the first tank body or the second tank body;
repeating the steps until the filtered solution is introduced into the second tank body, and introducing the solution in the second tank body into the foil generating set;
the step of filtering the dissolved solution by a filtering device and introducing the filtered solution into the first tank body or the second tank body comprises the following steps:
Acquiring a threshold value of the content of copper sulfate crystals;
Measuring the real-time copper sulfate crystal content in the solution;
when the real-time copper sulfate crystal content is lower than a threshold value, introducing the solution into the second tank body;
Introducing the solution into the first tank when the real-time copper sulfate crystal content is above a threshold;
In the step of measuring the real-time copper sulfate crystal content in the solution, comprising: and filtering the quantitative solution in the second tank body, weighing the residual copper sulfate crystals on the filter paper after filtering, comparing the weight with a threshold value, introducing the solution into the first tank body for continuous circulation if the weight is larger than the threshold value, and introducing the solution into the second tank body for recycling if the weight is smaller than the threshold value.
2. A copper sulfate crystal recycling apparatus, employing the copper sulfate crystal recycling method according to claim 1, said copper sulfate crystal recycling apparatus being adapted to be connected to a foil generating set, comprising;
The first tank body is communicated with the foil generating set and is used for containing a solution, wherein the solution comprises copper sulfate crystals and copper sulfate electrolyte discharged by the foil generating set and a dissolving solution for dissolving the copper sulfate crystals and the copper sulfate electrolyte, and the copper sulfate crystals do not contain organic matters;
the pump body is communicated with the first groove body and is used for leading out the solution;
the heat exchange device is communicated with the pump body and is used for heating and dissolving the solution;
The filtering device is communicated with the heat exchange device and is used for filtering the dissolved solution, and the filtering device is selectively communicated with the first tank body; and
The second groove body is communicated with the foil generating set, and the second groove body is selectively communicated with the filtering device.
3. The copper sulfate crystal recovery device according to claim 2, wherein the filter device is in communication with the first tank via a first conduit and the filter device is in communication with the second tank via a second conduit;
The first pipeline is provided with a first valve body, and the second pipeline is provided with a second valve body.
4. A copper sulphate crystal recycling apparatus according to claim 2 or 3 wherein the filtering means comprises:
The first filter is communicated with the heat exchange device and is used for filtering impurities with the particle size of D 1 in the solution; and
A second filter in communication with the first filter, the second filter for filtering impurities having a particle size D 2 from the solution;
Wherein, D1 and D2 are required to satisfy the following conditions: d 1＞3D2.
5. The copper sulfate crystal recovery device according to claim 4, wherein the first filter is a pocket filter and the second filter is a precision filter.
6. The copper sulfate crystal recovery device according to claim 4, wherein the first filter has a filtration accuracy of 5 μm and the second filter has a filtration accuracy of 1 μm.
7. The copper sulfate crystal recovery device according to claim 4, wherein the second filter comprises at least two, at least two of the second filters are arranged in parallel, and at least two of the second filters are each in communication with the first filter.
8. The copper sulfate crystal recovery device according to claim 2, wherein the heat exchange device comprises:
a water heater; and
The water inlet and the water outlet of the heat exchanger are communicated with the water heater, the water heater conveys hot water into the heat exchanger through the water inlet, so that the solution is heated, and cooled cold water is discharged back into the water heater through the water outlet.
9. The copper sulfate crystal recovery device according to claim 8, wherein the water heater is further in communication with the first tank to thereby introduce hot water into the first tank.
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| CN114990645A (en) | 2022-09-02 |
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