Comprehensive treatment system for copper-containing waste liquid

Abstract

The utility model relates to the technical field of waste liquid treatment, and particularly discloses a comprehensive treatment system for copper-containing waste liquid, which comprises an acidic copper-containing waste liquid tank, an alkaline copper-containing waste liquid tank, a synthetic reaction tank, a filter press, a copper recovery system, a neutralization tank, an intermediate tank, an ion exchange device, a heat exchange device, a second evaporator and a crystallization device, the acidic copper-containing waste liquid tank and the alkaline copper-containing waste liquid tank are both connected with the synthetic reaction tank, the output end of the synthetic reaction tank is connected with the filter press, and the residue output end of the filter press is connected with the copper recovery system, so that residues containing basic copper chloride are conveyed to the copper recovery system. The copper recovery system is used for recovering copper elements in basic copper chloride; the filtrate output end of the filter press, the neutralization tank, the intermediate tank, the ion exchange device, the heat exchange device, the second evaporator and the crystallization device are connected in sequence. According to the device, copper resources can be recycled, solid ammonium salt can be prepared, and the reutilization rate of the resources is improved.

Description

Technical Field

[0001] This utility model relates to the field of waste liquid treatment technology, and in particular to a comprehensive treatment system for copper-containing waste liquid. Background Technology

[0002] With the rise of the electronics industry, the amount of copper-containing industrial waste liquid generated has been increasing year by year. If this waste liquid is discharged directly, it will not only lead to the waste of copper resources, but also cause serious pollution to the environment.

[0003] Therefore, some copper-containing waste liquid treatment devices have emerged in the existing technology. These devices can recover copper resources from copper-containing waste liquid, but other useful substances such as ammonium salts are not effectively utilized during the treatment process, which reduces the resource reuse rate. Utility Model Content

[0004] This invention provides a comprehensive treatment system for copper-containing waste liquid, which can not only recover copper resources, but also prepare solid ammonium salts, thereby improving the resource reuse rate.

[0005] To solve the above problems, the present invention adopts the following technical solution:

[0006] An embodiment of this utility model provides a comprehensive treatment system for copper-containing waste liquid, including an acidic copper-containing waste liquid tank, an alkaline copper-containing waste liquid tank, a synthesis reaction tank, a filter press, a copper recovery system, a neutralization tank, an intermediate tank, an ion exchange device, a heat exchange device, a second evaporator, and a crystallization device;

[0007] Both the acidic copper-containing waste liquid tank and the alkaline copper-containing waste liquid tank are connected to the synthesis reaction tank. The output end of the synthesis reaction tank is connected to the filter press, and the residue output end of the filter press is connected to the copper recovery system to transport the residue containing basic copper chloride to the copper recovery system. The copper recovery system is used to recover the copper element in basic copper chloride.

[0008] The filter press is sequentially connected to a filtrate output end, a neutralization tank, an intermediate tank, an ion exchange device, a heat exchange device, a second evaporator, and a crystallization device. The filter press outputs the filtered filtrate to the neutralization tank, which is used to adjust the pH of the filtrate. The intermediate tank is used to temporarily store the filtrate. The ion exchange device is used to adsorb metal ions in the filtrate. The heat exchange device is used to heat the filtrate after ion exchange. The second evaporator is used to evaporate the water in the filtrate. The crystallization device is used to crystallize ammonium salts to prepare ammonium salts.

[0009] In some embodiments, the heat exchange device includes a heat exchanger, a hot water inlet pipe, a cold water outlet pipe, a circulating pump, and a condenser. The heat exchanger includes two heat exchange channels capable of heat exchange. One heat exchange channel is connected at both ends to an ion exchange device and a second evaporator, respectively. One end of the other heat exchange channel, the cold water outlet pipe, the condenser, the hot water inlet pipe, and the other end of the other heat exchange channel are sequentially connected. A circulating pump is provided in the cold water outlet pipe.

[0010] In some embodiments, the steam output end of the second evaporator is connected to the condenser to heat the water in the hot water inlet pipe.

[0011] In some embodiments, a denitrification device and a temporary storage device are also included. The condenser, the denitrification device and the temporary storage device are connected in sequence. The condenser delivers condensate to the denitrification device, which is used to remove ammonia nitrogen from the condensate. The temporary storage device is used to store the denitrified water that has undergone ammonia nitrogen removal treatment.

[0012] In some embodiments, the copper recovery system includes a pulping tank, an intermediate reaction tank, a sulfuric acid tank, a centrifuge, and a first evaporator. The residue output end of the filter press is connected to the pulping tank to convey residue containing basic copper chloride to the pulping tank. Both the pulping tank and the sulfuric acid tank are connected to the intermediate reaction tank. The output end of the intermediate reaction tank is connected to the centrifuge. The centrifuge is used to separate wet copper sulfate pentahydrate and convey the wet copper sulfate pentahydrate to the first evaporator. The first evaporator outputs dry copper sulfate pentahydrate.

[0013] In some embodiments, the filter press, intermediate reaction vessel, and first evaporator are all connected to the waste gas treatment device.

[0014] This invention has at least the following beneficial effects: Both the acidic and alkaline copper-containing waste liquid tanks are connected to a synthesis reaction tank. After neutralization, the acidic and alkaline copper-containing waste liquids are output to a filter press. The filter press filters the reacted substances, and the filtered residue contains basic copper chloride. The copper element in the basic copper chloride is recovered by a copper recovery system. The filter press's filtrate output end, neutralization tank, intermediate tank, ion exchange device, heat exchange device, second evaporator, and crystallization device are sequentially connected. After processing by the neutralization tank, intermediate tank, ion exchange device, heat exchange device, second evaporator, and crystallization device, ammonium salt is obtained. Therefore, this invention can not only recover copper resources but also prepare solid ammonium salt, improving the resource reuse rate. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of a comprehensive treatment system for copper-containing waste liquid according to an embodiment of the present invention.

[0016] The attached figures are labeled as follows:

[0017] Acidic copper-containing waste liquid tank 110, alkaline copper-containing waste liquid tank 120, synthesis reaction tank 130, filter press 140;

[0018] Copper recovery system 200, pulping tank 210, intermediate reaction tank 220, sulfuric acid tank 230, centrifuge 240, first evaporator 250;

[0019] Neutralization tank 310, intermediate tank 320, ion exchange device 330, second evaporator 340, crystallization device 350;

[0020] Heat exchange device 400, heat exchanger 410, hot water inlet pipe 420, cold water outlet pipe 430, circulating pump 440, condenser 450, denitrification device 460, temporary storage device 470;

[0021] 500 waste gas treatment device. Detailed Implementation

[0022] This invention provides the following description with reference to the accompanying drawings to aid in a comprehensive understanding of the various embodiments of the invention as defined by the claims and their equivalents. The description includes various specific details to aid understanding, but these details should be considered exemplary only. Therefore, those skilled in the art will recognize that various changes and modifications can be made to the various embodiments described herein without departing from the scope and spirit of the invention.

[0023] In the description of this utility model, the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0024] It should be understood that when one element (e.g., the first element) is “connected” to another element (e.g., the second element), the element may be directly connected to the other element, or there may be an intervening element (e.g., the third element) between the element and the other element.

[0025] Embodiments of this utility model provide a comprehensive treatment system for copper-containing wastewater, such as... Figure 1 As shown, it includes an acidic copper-containing waste liquid tank 110, an alkaline copper-containing waste liquid tank 120, a synthesis reaction tank 130, a filter press 140, a copper recovery system 200, a neutralization tank 310, an intermediate tank 320, an ion exchange device 330, a heat exchange device 400, a second evaporator 340, and a crystallization device 350.

[0026] Acidic copper-containing waste liquid tank 110 contains acidic copper-containing waste liquid, mainly consisting of copper ammonia, while alkaline copper-containing waste liquid tank 120 contains alkaline copper-containing waste liquid, mainly consisting of copper chloride. Both acidic and alkaline copper-containing waste liquid tanks 110 and 120 are connected to a synthesis reaction tank 130, allowing the acidic and alkaline copper-containing waste liquids to undergo a neutralization reaction within the synthesis reaction tank 130. The output end of the synthesis reaction tank 130 is connected to a filter press 140 to transport the reacted material to the filter press 140, which filters the material in the synthesis reaction tank 130, separating the solution and residue. The residue output end of the filter press 140 is connected to a copper recovery system 200 to transport the residue containing basic copper chloride to the copper recovery system 200. The copper recovery system 200 can be an existing recovery system to recover copper from the basic copper chloride, ultimately producing copper sulfate or other copper-containing substances.

[0027] The filter press 140 is sequentially connected to a filtrate output end, a neutralization tank 310, an intermediate tank 320, an ion exchange device 330, a heat exchange device 400, a second evaporator 340, and a crystallization device 350. The filter press 140 outputs the filtered filtrate to the neutralization tank 310, which is used to adjust the pH of the filtrate. Specifically, acid or alkali can be added depending on the pH value of the filtrate to bring the solution to a suitable pH range. The intermediate tank 320 is used to temporarily store the filtrate for later use. The ion exchange device 330 adsorbs metal ions in the filtrate using ion exchange resin, such as removing residual copper ions. The heat exchange device 400 heats the filtrate after ion exchange to facilitate evaporation. The second evaporator 340 evaporates the water in the filtrate, and the crystallization device 350 crystallizes ammonium salts to prepare solid ammonium salts. Therefore, this embodiment not only recovers copper resources but also prepares solid ammonium salts, improving the resource reuse rate.

[0028] In some embodiments, the heat exchange device 400 includes a heat exchanger 410, a hot water inlet pipe 420, a cold water outlet pipe 430, a circulation pump 440, and a condenser 450. The heat exchanger 410 includes two heat exchange channels capable of heat exchange. The two ends of one heat exchange channel are connected to the ion exchange device 330 and the second evaporator 340, respectively. One end of the other heat exchange channel, the cold water outlet pipe 430, the condenser 450, the hot water inlet pipe 420, and the other end of the other heat exchange channel are sequentially connected. The circulation pump 440 is provided in the cold water outlet pipe 430.

[0029] When the circulating pump 440 is working, the water circulates. The cold water in the cold water outlet pipe 430 enters the condenser 450 and is heated by the condenser 450. The heated hot water enters the heat exchanger 410 through the hot water inlet pipe 420, thereby heating the filtrate after ion exchange. The hot water itself cools down and then enters the condenser 450 through the cold water outlet pipe 430, thus circulating to heat the filtrate after ion exchange.

[0030] Furthermore, the steam output end of the second evaporator 340 is connected to the condenser 450. The steam generated in the second evaporator 340 is input into the condenser 450, thereby heating the water in the hot water inlet pipe 420. This makes reasonable use of the steam generated by the second evaporator 340, eliminating the need for an additional heating device for the condenser 450 and reducing energy consumption.

[0031] Furthermore, the comprehensive treatment system for copper-containing waste liquid also includes a denitrification device 460 and a temporary storage device 470. The condenser 450, the denitrification device 460, and the temporary storage device 470 are connected in sequence. During the process of heating the water in the hot water inlet pipe 420, the condenser 450 will produce condensate. The condenser 450 will transport the condensate to the denitrification device 460, which is used to remove ammonia nitrogen from the condensate. The temporary storage device 470 is used to store the treated water that has undergone ammonia nitrogen removal, which can be used for other water use in the workshop later.

[0032] In some embodiments, the copper recovery system 200 includes a pulping tank 210, an intermediate reaction tank 220, a sulfuric acid tank 230, a centrifuge 240, and a first evaporator 250. The residue output end of the filter press 140 is connected to the pulping tank 210 to transport residue containing basic copper chloride to the pulping tank 210 for pulping. The sulfuric acid tank 230 stores sulfuric acid. Both the pulping tank 210 and the sulfuric acid tank 230 are connected to the intermediate reaction tank 220 to transport the pulped material and sulfuric acid to the intermediate reaction tank 220, where a copper sulfate solution is prepared. The output end of the intermediate reaction tank 220 is connected to the centrifuge 240, which separates wet copper sulfate pentahydrate and mother liquor. The mother liquor can be returned to the intermediate reaction tank 220, while the wet copper sulfate pentahydrate is transported to the first evaporator 250. The first evaporator 250 evaporates the water in the copper sulfate pentahydrate, thereby outputting dry copper sulfate pentahydrate.

[0033] Furthermore, the filter press 140, intermediate reaction tank 220 and first evaporator 250 are all connected to the waste gas treatment device 500, which is used to collect and treat waste gas. For example, the waste gas treatment device 500 can be an alkaline spray tower.

[0034] The terms and words used in the foregoing description and claims are not limited to their literal meaning, but are merely used by the applicant to enable a clear and consistent understanding of the present invention. Therefore, those skilled in the art should understand that the foregoing description of various embodiments of the present invention is for illustrative purposes only, and not intended to limit the present invention as defined by the appended claims and their equivalents.

Claims

1. A comprehensive treatment system for copper-containing wastewater, characterized in that: It includes acidic copper-containing waste liquid tanks, alkaline copper-containing waste liquid tanks, synthesis reaction tanks, filter presses, copper recovery systems, neutralization tanks, intermediate tanks, ion exchange devices, heat exchange devices, second evaporators, and crystallization devices; Both the acidic copper-containing waste liquid tank and the alkaline copper-containing waste liquid tank are connected to the synthesis reaction tank. The output end of the synthesis reaction tank is connected to the filter press, and the residue output end of the filter press is connected to the copper recovery system to transport the residue containing basic copper chloride to the copper recovery system. The copper recovery system is used to recover the copper element in basic copper chloride. The filter press is sequentially connected to a filtrate output end, a neutralization tank, an intermediate tank, an ion exchange device, a heat exchange device, a second evaporator, and a crystallization device. The filter press outputs the filtered filtrate to the neutralization tank, which is used to adjust the pH of the filtrate. The intermediate tank is used to temporarily store the filtrate. The ion exchange device is used to adsorb metal ions in the filtrate. The heat exchange device is used to heat the filtrate after ion exchange. The second evaporator is used to evaporate the water in the filtrate. The crystallization device is used to crystallize ammonium salts to prepare ammonium salts.

2. The comprehensive treatment system for copper-containing wastewater according to claim 1, characterized in that: The heat exchange device includes a heat exchanger, a hot water inlet pipe, a cold water outlet pipe, a circulating pump, and a condenser. The heat exchanger includes two heat exchange channels for heat exchange. One heat exchange channel is connected to an ion exchange device and a second evaporator at both ends. The other heat exchange channel is connected in sequence to one end, the cold water outlet pipe, the condenser, the hot water inlet pipe, and the other end of the other heat exchange channel. A circulating pump is installed in the cold water outlet pipe.

3. The comprehensive treatment system for copper-containing wastewater according to claim 2, characterized in that: The steam output end of the second evaporator is connected to the condenser to heat the water in the hot water inlet pipe.

4. The comprehensive treatment system for copper-containing wastewater according to claim 2, characterized in that: It also includes a denitrification device and a temporary storage device. The condenser, the denitrification device and the temporary storage device are connected in sequence. The condenser delivers the condensate to the denitrification device, which is used to remove ammonia nitrogen from the condensate. The temporary storage device is used to store the treated wastewater that has undergone ammonia nitrogen removal.

5. The comprehensive treatment system for copper-containing wastewater according to any one of claims 1-4, characterized in that: The copper recovery system includes a pulping tank, an intermediate reaction tank, a sulfuric acid tank, a centrifuge, and a first evaporator. The residue output end of the filter press is connected to the pulping tank to transport residue containing basic copper chloride to the pulping tank. Both the pulping tank and the sulfuric acid tank are connected to the intermediate reaction tank. The output end of the intermediate reaction tank is connected to the centrifuge. The centrifuge is used to separate wet copper sulfate pentahydrate and transport the wet copper sulfate pentahydrate to the first evaporator. The first evaporator outputs dry copper sulfate pentahydrate.

6. The comprehensive treatment system for copper-containing wastewater according to claim 5, characterized in that: The filter press, intermediate reaction tank, and first evaporator are all connected to the waste gas treatment device.

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