CN216639610U - Waste copper recovery system - Google Patents
Waste copper recovery system Download PDFInfo
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- CN216639610U CN216639610U CN202122827763.1U CN202122827763U CN216639610U CN 216639610 U CN216639610 U CN 216639610U CN 202122827763 U CN202122827763 U CN 202122827763U CN 216639610 U CN216639610 U CN 216639610U
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Abstract
The application belongs to the technical field of recovery systems, and particularly relates to a waste copper recovery system which comprises a neutralization device, a copper recovery device and a copper recovery device, wherein the neutralization device is used for precipitating copper in copper-containing waste liquid to obtain a solid-liquid mixture; the first solid-liquid separation device is connected with the neutralization device and is used for separating copper-containing precipitates from a solid-liquid mixture; the dissolving device is connected with the solid-liquid separation device and is used for dissolving the copper-containing precipitate to obtain a copper sulfate solution; the evaporation device is connected with the dissolving device and is used for distilling water in the copper sulfate solution to obtain a copper sulfate pentahydrate crude product and condensed water; and the recrystallization device is connected with the evaporation device and is used for dissolving the crude product of the blue copperas and recrystallizing to separate out the blue copperas.
Description
Technical Field
The application belongs to the technical field of recovery systems, especially, relate to a copper scrap recovery system.
Background
Electrolytic copper foil is an important base material for the electronic information industry. The copper foil is prepared by dissolving high-purity copper into copper sulfate electrolyte, and electrodepositing the copper sulfate electrolyte into a raw foil under the action of direct current in special electrolytic equipment; then, the original foil is subjected to a series of surface treatments such as roughening, heat resistance, oxidation resistance and the like according to requirements to prepare the electrolytic copper foil.
In each step of processes of raw foil production and surface treatment, a water washing process is required to remove electrolyte attached to the surface, so that a large amount of acidic low-copper-containing waste liquid is generated in the whole production process, the treatment difficulty of the acidic low-copper-containing waste liquid is high, and the traditional scheme mainly comprises the following steps: 1. the copper is directly discharged to a waste liquid treatment facility for treatment, and the copper resource in the acidic low-copper-containing waste liquid cannot be recovered, so that waste is caused; 2. the process has high equipment investment, operation and maintenance cost due to high quality requirement (containing more than 50g/L of copper and no other impurity ions) of the copper sulfate solution recycled to the production line.
SUMMERY OF THE UTILITY MODEL
An object of the application is to provide a copper scrap recovery system, aim at solving copper-containing waste liquid treatment cost to a certain extent high, easily cause the problem of wasting of resources.
In order to achieve the purpose of the application, the technical scheme adopted by the application is as follows:
the application provides a copper scrap recovery system, include
The neutralizing device is used for precipitating copper in the copper-containing waste liquid to obtain a solid-liquid mixture;
the first solid-liquid separation device is connected with the neutralization device and is used for separating copper-containing precipitates from a solid-liquid mixture;
the dissolving device is connected with the first solid-liquid separation device and is used for dissolving the copper-containing precipitate to obtain a copper sulfate solution;
the evaporation device is connected with the dissolving device and is used for distilling water in the copper sulfate solution to obtain a copper sulfate pentahydrate crude product and condensed water;
and the recrystallization device is connected with the evaporation device and is used for dissolving the crude product of the blue copperas and recrystallizing to separate out the blue copperas.
Further, the evaporation device comprises an evaporator;
and/or the recrystallization device comprises a recrystallization container and a refrigerating piece for cooling the solution in the recrystallization container.
Further, the evaporator is connected with the recrystallization vessel through a solid conveying channel and a liquid conveying channel.
Further, a second solid-liquid separation device is connected between the dissolving device and the evaporation device.
Further, the second solid-liquid separation device comprises a cloth bag filter.
Further, the copper recovery system also comprises a liquid storage device, and the liquid storage device is arranged between the dissolving device and the evaporation device;
or the liquid storage device is arranged between the second solid-liquid separation device and the evaporation device.
Further, the dissolving device comprises a dissolving tank, and a pH monitoring piece and a sulfate radical monitoring piece which are arranged inside the dissolving tank.
Further, the neutralization device comprises a neutralization tank, and a stirring piece is arranged in the neutralization tank;
and/or, the first solid-liquid separation device comprises a filter press;
the dissolving device comprises a dissolving tank, and a stirring piece or an internal circulating pump is arranged in the dissolving tank.
Further, the device also comprises a waste liquid treatment tank, wherein the waste liquid treatment tank is connected with the first solid-liquid separation device.
Further, the device also comprises a collecting device, and the collecting device is connected with the neutralizing device.
Adopt the copper recovery system that this application provided to handle the copper-containing waste liquid, make the waste liquid of emission up to standard completely, accord with the environmental protection requirement, can also separate out the high blue vitriol of purity, have higher economic value, in addition, the blue vitriol purity of retrieving is high, can directly be used back in the copper foil production line, not only environmental protection can reduce copper foil manufacturing cost again.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic diagram showing the connection relationship between devices in a waste copper recovery system according to an embodiment of the present application;
fig. 2 is a schematic connection diagram of devices in a waste copper recovery system according to another embodiment of the present application.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present application more clearly apparent, the present application is further described in detail below with reference to the embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
In this application, the term "and/or" describes an association relationship of associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a is present alone, A and B are present simultaneously, and B is present alone. Wherein A and B can be singular or plural. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship.
In the present application, "at least one" means one or more, "a plurality" means two or more. "at least one of the following" or similar expressions refer to any combination of these items, including any combination of the singular or plural items. For example, "at least one (one) of a, b, or c," or "at least one (one) of a, b, and c," may each represent: a, b, c, a-b (i.e., a and b), a-c, b-c, or a-b-c, wherein a, b, and c may be single or plural, respectively.
It should be understood that, in various embodiments of the present application, the sequence numbers of the above-mentioned processes do not mean the execution sequence, some or all of the steps may be executed in parallel or executed sequentially, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.
The terminology used in the embodiments of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in the examples of this application and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
The weight of the related components mentioned in the description of the embodiments of the present application may not only refer to the specific content of each component, but also represent the proportional relationship of the weight among the components, and therefore, the content of the related components is scaled up or down within the scope disclosed in the description of the embodiments of the present application as long as it is scaled up or down according to the description of the embodiments of the present application. Specifically, the mass in the description of the embodiments of the present application may be in units of mass known in the chemical industry, such as μ g, mg, g, and kg.
The terms "first" and "second" are used for descriptive purposes only and are used for distinguishing purposes such as substances from one another and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. For example, a first XX may also be referred to as a second XX, and similarly, a second XX may also be referred to as a first XX, without departing from the scope of embodiments of the present application. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.
In each step of processes of raw foil production and surface treatment, a water washing process is required to remove electrolyte attached to the surface, so that a large amount of acidic low-copper-containing waste liquid is generated in the whole production process, the treatment difficulty of the acidic low-copper-containing waste liquid is high, and the traditional scheme mainly comprises the following steps: 1. the copper is directly discharged to a waste liquid treatment facility for treatment, and the copper resource in the acidic low-copper-containing waste liquid cannot be recovered, so that waste is caused; 2. the process has high equipment investment, operation and maintenance cost due to high quality requirement (containing more than 50g/L of copper and no other impurity ions) of the copper sulfate solution recycled to the production line. The problem of copper-containing waste liquid treatment cost is high, easily cause the wasting of resources is solved, this application provides a copper scrap recovery system, as shown in figure 1, include:
the neutralizing device is used for precipitating copper in the copper-containing waste liquid to obtain a solid-liquid mixture;
the first solid-liquid separation device is connected with the neutralization device and is used for separating copper-containing precipitates from a solid-liquid mixture;
the dissolving device is connected with the first solid-liquid separation device and is used for dissolving the copper-containing precipitate to obtain a copper sulfate solution;
the evaporation device is connected with the dissolving device and is used for distilling water in the copper sulfate solution to obtain a copper sulfate pentahydrate crude product and condensed water;
and the recrystallization device is connected with the evaporation device and is used for dissolving the crude product of the blue copperas and recrystallizing to separate out the blue copperas.
The copper-containing waste liquid is treated by the copper recovery system, the high copper-containing waste liquid (such as copper-containing concentration can reach 0.5-5 g/L) which is generated in copper foil production and subjected to membrane concentration enters the neutralization device of the embodiment of the application to react completely, after the precipitate is generated, the copper-containing precipitate is obtained through separation by the first solid-liquid separation device and dissolved by the dissolving device, a copper sulfate solution is obtained, the copper sulfate solution is subjected to evaporation crystallization treatment by the evaporation device to obtain a crude copper sulfate pentahydrate product, and the crude copper sulfate pentahydrate product is subjected to recrystallization treatment by the recrystallization device to obtain the copper sulfate pentahydrate with higher purity and better quality.
The copper recovery system that this embodiment provided can make the waste liquid of emission reach standard completely, accords with the environmental protection requirement, can also obtain the blue vitriol of high purity, has higher economic value, and in addition, the blue vitriol purity of retrieving is high, can directly be used back in the copper foil production line, and not only environmental protection can reduce copper foil manufacturing cost again.
In some embodiments of the present application, the neutralization device comprises a neutralization tank, wherein an agitation member is arranged in the neutralization tank, the agitation member is used for agitating the copper-containing waste liquid in the neutralization tank, so that the copper-containing waste liquid can react with the alkaline solution in the neutralization tank more fully, the copper can be precipitated more fully, the shape of an agitation blade of the agitation member includes but is not limited to one or more of an oblong shape, a straight shape and an oblique blade shape, and the agitation blade is preferably an oblong shape, has small volume and occupies less space, and is suitable for solid-liquid mixtures with lower viscosity;
in some embodiments of the present application, the neutralization device further comprises a PH monitoring unit disposed in the neutralization tank for detecting whether the PH of the solution in the neutralization tank is 7 to 10, and in this PH range, the copper ions in the copper-containing waste solution can undergo a precipitation reaction to generate a copper-containing precipitate.
In some embodiments of the present application, the waste copper recovery system further comprises a collecting device, as shown in fig. 2, connected to the neutralizing device, for collecting the copper-containing waste liquid after membrane concentration and delivering the copper-containing waste liquid to the neutralizing device, wherein the collecting device comprises a collecting container, the shape of the collecting container includes but is not limited to one of a barrel shape, a square barrel shape, a circular groove shape and a square groove shape, and the collecting device, the neutralizing device and the first solid-liquid separating device are connected through a pipeline and a pump, so as to facilitate directional quantitative delivery of the liquid.
In some embodiments of the present application, the first solid-liquid separation device includes a filter press for separating a copper-containing precipitate from a copper-containing solid-liquid mixture neutralized by the neutralization device, the filter press may be, but is not limited to, a vertical filter press, a belt filter press, a plate-and-frame filter press, or a box filter press, and is preferably a membrane filter press, the membrane filter press is a filter press in which an elastic membrane is additionally disposed between a filter plate and a filter cloth, during use, when the material feeding is finished, a high-pressure fluid or a gas medium may be injected into the membrane plate, and the whole membrane is bulged to press the filter cake, thereby further dewatering the filter cake, and the membrane filter press exhibits good effects in terms of unit area treatment capacity, reduction of water content of the filter cake, adaptability to the properties of the treated material, and the like.
In some embodiments of the present application, the waste copper recovery system further includes a waste liquid treatment tank, and the waste liquid treatment tank is connected to the first solid-liquid separation device and is configured to receive waste liquid obtained after the solids are separated by the first solid-liquid separation device.
In some embodiments of the present application, the dissolving device comprises a dissolving tank, and a stirring member or an internal circulation pump is arranged in the dissolving tank, and the shape of the stirring blade of the stirring member includes but is not limited to one or more of an oblong shape, a straight shape and a diagonal blade shape, and is used for uniformly mixing the solid and the liquid in the dissolving tank, so that the copper-containing precipitate is fully dissolved to obtain a uniform copper sulfate solution; further, the dissolving device also comprises a pH monitoring part and a sulfate radical monitoring part which are arranged inside the dissolving tank, and the pH value and the sulfate radical ion concentration of the solution in the dissolving tank are detected, so that the copper in the copper-containing precipitate can be fully dissolved to obtain a copper sulfate solution.
In some embodiments of the present application, the dissolution tank of the dissolution device is movably disposed below the membrane filter press, and the copper-containing precipitate formed after the membrane filter press removes water directly falls from the discharge port of the membrane filter press to the dissolution tank of the dissolution device for subsequent dissolution reaction.
In other embodiments of this application, be connected through transmission between the discharge gate of membrane filter press and the dissolving tank of dissolving device, adopt transmission to connect like belt, conveyer belt etc. and realize that copper-containing deposits accurate transport, avoided copper-containing deposit to produce the loss because of the spill in the whereabouts in-process.
In some embodiments of the present application, the waste copper recovery system further includes a second solid-liquid separation device, the second solid-liquid separation device is connected to the dissolving device and the evaporation device, and is configured to filter and remove insoluble impurities in the copper solution obtained by dissolving through the dissolving device, and convey the copper sulfate solution obtained after removing the insoluble impurities to the evaporation device, further, the second solid-liquid separation device employs a plate filter or a bag filter, in a specific embodiment of the present application, the second solid-liquid separation device employs a bag filter, the bag filter is made of non-woven fabric or glass fiber, the filtering efficiency is high, and the cleaning and replacement period is long.
In some embodiments of the present application, the waste copper recovery system further includes a storage device disposed between the dissolving device and the evaporation device, and configured to store the copper sulfate solution dissolved by the dissolving device and deliver the copper sulfate solution to the evaporation device as needed.
In some embodiments of the present application, the waste copper recycling system further includes a second solid-liquid separation device and a liquid storage device, as shown in fig. 2, the liquid storage device is disposed between the second solid-liquid separation device and the evaporation device, and the second solid-liquid separation device is connected to the dissolution device at the same time.
In some embodiments of the present application, the evaporation apparatus includes an evaporator, configured to perform an evaporation crystallization process on the copper sulfate solution, where the evaporation crystallization process is performed through an evaporation process, and as the solvent volatilizes, the original unsaturated solution gradually changes into a saturated solution, and the saturated solution gradually changes into a supersaturated solution, and then the solute starts to precipitate from the supersaturated solution to obtain a solid product.
In some specific embodiments of the present application, the evaporator may be a horizontal evaporator commonly used by those skilled in the art, or may be a vertical tube evaporator, or may be a spiral tube evaporator, and in other specific embodiments of the present application, the evaporator may also be a self-made evaporation container with a heating function and capable of receiving a copper-containing waste liquid, further, the shape of the evaporation container includes but is not limited to one of a drum shape, a square drum shape, a circular groove shape, and a square groove shape, and it should be noted that the evaporation container is hermetically connected to the collecting device and the condensed water recovering device, so as to facilitate rapid temperature rise during evaporation crystallization and improve evaporation efficiency; the evaporation container of the evaporation device is also provided with a detachable or movably sealed discharge opening, so that the crude product of blue vitriod obtained after evaporation and crystallization in the evaporator can be conveniently discharged out of the evaporator and conveyed to the recrystallization device.
In the embodiment of the application, the evaporator is connected with the recrystallization vessel through a solid conveying channel and a liquid conveying channel,
in a specific embodiment of the present application, the solid conveying channel is used for conveying the copper sulfate pentahydrate crude product obtained after evaporation and crystallization in the evaporator to the recrystallization device, in an alternative embodiment of the present application, the solid conveying channel includes, but is not limited to, a belt conveyor, a plate conveyor, a trolley conveyor, and a scraper conveyor, furthermore, in another embodiment of the present application, the recrystallization device may be movably arranged below the discharge port of the evaporator of the evaporation device, and the copper sulfate pentahydrate crude product obtained after evaporation and crystallization in the evaporation device falls from the discharge port and directly enters the recrystallization container of the recrystallization device;
in a specific embodiment of the present application, the liquid conveying channel is configured to circulate and return a waste liquid obtained after recrystallization processing by the recrystallization device to the evaporation device, so as to perform cyclic evaporation, and recover copper sulfate pentahydrate repeatedly, thereby increasing the yield of copper sulfate pentahydrate at maximum efficiency.
It should be noted that recrystallization is a method of separating and purifying a high-value crystalline product from unnecessary impurities dissolved in a mother liquor by a process of dissolving crystals in a solvent or melting and then recrystallizing from the solution or melt. Strictly speaking, recrystallization is a process in which an initially solidified crystalline material is redissolved and recrystallized to produce a final crystalline product of desired size, shape, purity and yield, and the dissolution and recrystallization also significantly reduce the internal energy of the crystal to achieve a more comprehensive energy balance required for the formation of stable polymorphs.
In one embodiment of the present application, the recrystallization may be a re-evaporative crystallization;
in another embodiment of the application, the recrystallization adopts cooling crystallization, the recrystallization device comprises a recrystallization container and a refrigeration piece for cooling solution in the recrystallization container, the refrigeration piece is used for dissolving the crude product of copper sulfate pentahydrate and then recrystallizing to obtain higher-quality copper sulfate pentahydrate, the refrigeration piece is an ice water cooling plate or an ice water cooling pipe, and the ice water cooling plate or the ice water cooling pipe is connected with the container wall of the recrystallization container.
In one specific implementation of the application, the refrigerating element is an ice water cooling plate, the ice water cooling plate is arranged in contact with the wall of the container of the recrystallization container, the ice water cooling plate is arranged on the outer wall of the container of the recrystallization container, the ice water cooling plate is of a hollow structure, and an ice water mixture is circulated in the ice water cooling plate and used for cooling the solution in the recrystallization container to separate out high-quality blue vitriod;
in another embodiment of the application, the refrigeration member is an ice water cooling pipe, the ice water cooling pipe is arranged in contact with the wall of the recrystallization container, the ice water cooling pipe is arranged on the outer wall of the recrystallization container, the number of the ice water cooling pipes is one or more, when the number of the ice water cooling pipes is more than one, the ice water cooling pipes can be pasted or welded on the outer wall of the recrystallization container in parallel or alternatively, the ice water cooling pipes can be pasted or welded on the outer wall of the recrystallization container in a staggered manner, ice water mixture circulates in the plate of the ice water cooling pipes and is used for cooling the solution in the recrystallization container to separate out high-quality copper sulfate pentahydrate.
The present application is intended to cover various modifications, equivalent arrangements, and adaptations of the present application without departing from the spirit and scope of the present application.
Claims (10)
1. A waste copper recovery system is characterized by comprising
The neutralizing device is used for precipitating copper in the copper-containing waste liquid to obtain a solid-liquid mixture;
the first solid-liquid separation device is connected with the neutralization device and is used for separating copper-containing precipitates from a solid-liquid mixture;
the dissolving device is connected with the first solid-liquid separation device and is used for dissolving the copper-containing precipitate to obtain a copper sulfate solution;
the evaporation device is connected with the dissolving device and is used for distilling water in the copper sulfate solution to obtain a copper sulfate pentahydrate crude product and condensed water;
and the recrystallization device is connected with the evaporation device and is used for dissolving the crude product of the blue copperas and recrystallizing to separate out the blue copperas.
2. The scrap copper recovery system in accordance with claim 1 wherein the evaporation apparatus comprises an evaporator;
and/or the recrystallization device comprises a recrystallization container and a refrigerating piece for cooling the solution in the recrystallization container.
3. The scrap copper recovery system in accordance with claim 2 wherein the evaporator is connected to the recrystallization vessel by a solids transfer passage and a liquid transfer passage.
4. The waste copper recovery system according to claim 1, wherein a second solid-liquid separation device is further connected between the dissolution device and the evaporation device.
5. The waste copper recovery system of claim 4, wherein the second solid-liquid separation device comprises a cloth bag filter.
6. The waste copper recovery system according to claim 4, further comprising a liquid storage device provided between the dissolving device and the evaporation device;
or the liquid storage device is arranged between the second solid-liquid separation device and the evaporation device.
7. The scrap copper recovery system in accordance with claim 1, wherein the dissolving apparatus comprises a dissolving tank and a pH monitoring member and a sulfate radical monitoring member provided inside the dissolving tank.
8. The scrap copper recovery system in accordance with claim 1 wherein the neutralization apparatus comprises a neutralization tank, the neutralization tank having an agitation member disposed therein;
and/or, the first solid-liquid separation device comprises a filter press;
the dissolving device comprises a dissolving tank, and a stirring piece or an internal circulating pump is arranged in the dissolving tank.
9. The waste copper recovery system according to claim 1, further comprising a waste liquid treatment tank connected to the first solid-liquid separation device.
10. The scrap copper recovery system in accordance with claim 1 further including a collection apparatus connected to the neutralization apparatus.
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| CN202122827763.1U CN216639610U (en) | 2021-11-17 | 2021-11-17 | Waste copper recovery system |
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| CN202122827763.1U CN216639610U (en) | 2021-11-17 | 2021-11-17 | Waste copper recovery system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114990645A (en) * | 2022-06-30 | 2022-09-02 | 深圳惠科新材料有限公司 | Copper sulfate crystal recovery device and method |
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2021
- 2021-11-17 CN CN202122827763.1U patent/CN216639610U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114990645A (en) * | 2022-06-30 | 2022-09-02 | 深圳惠科新材料有限公司 | Copper sulfate crystal recovery device and method |
| CN114990645B (en) * | 2022-06-30 | 2024-04-16 | 深圳惠科新材料股份有限公司 | Copper sulfate crystal recovery device and method |
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