CN114890490A - Electroplating waste liquid recycling system and recycling method thereof - Google Patents
Electroplating waste liquid recycling system and recycling method thereof Download PDFInfo
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- CN114890490A CN114890490A CN202210234963.2A CN202210234963A CN114890490A CN 114890490 A CN114890490 A CN 114890490A CN 202210234963 A CN202210234963 A CN 202210234963A CN 114890490 A CN114890490 A CN 114890490A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/10—Treatment of water, waste water, or sewage by heating by distillation or evaporation by direct contact with a particulate solid or with a fluid, as a heat transfer medium
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
- C02F2101/22—Chromium or chromium compounds, e.g. chromates
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/16—Nature of the water, waste water, sewage or sludge to be treated from metallurgical processes, i.e. from the production, refining or treatment of metals, e.g. galvanic wastes
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- 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
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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Abstract
The invention discloses an electroplating waste liquid recovery processing system and a recovery processing method thereof, wherein electroplating equipment is provided with an electroplating bath and a recovery tank, a circulating tank connected with the electroplating bath, a collecting tank connected with the recovery tank and the circulating tank, an atmospheric concentration tower connected with the collecting tank, a cold simulation device connected with the atmospheric concentration tower and a fan connected with the cold simulation device; an independent circulating heater is arranged in the collecting tank, and a second heater is arranged between the atmospheric concentration tower and the collecting tank; by means of the set recovery processing method, waste liquid containing hexavalent chromium metal ions can be collected from the recovery tank, is evaporated and concentrated in the atmosphere concentration tower after being heated to obtain concentrated stock solution, and is recovered into the electroplating tank for utilization, and in addition, the water vapor is recovered through the cooling simulation device to generate recovered water which can flow back to the recovery tank or the cleaning tank for reuse, so that the recovery processing efficiency can be improved.
Description
Technical Field
The invention relates to the technical field of electroplating waste liquid recovery treatment, in particular to an electroplating waste liquid recovery treatment system and a recovery treatment method thereof, which can separate waste liquid flowing out of a recovery tank of electroplating equipment into concentrated stock solution and recovered water of hexavalent chromium metal ions, and then recover the concentrated stock solution and the recovered water into an electroplating tank and the recovery tank respectively for recycling.
Background
Chromium electroplating baths represent a large proportion of the electroplating industry, but the waste solutions from the electroplating baths and recovery baths contain highly toxic hexavalent chromium metal ions, which can cause damage to the skin, eyes, ears, respiratory tract and gastrointestinal tract when exposed to hexavalent chromium, which is also a carcinogen, and thus the waste solutions from the electroplating industry can be a significant hazard to the human body, environment and ecology if not properly treated. The existing hexavalent chromium metal ion treatment and recovery method in the electroplating industrial waste liquid comprises an ion exchange method, an evaporation concentration method, a dialysis method, an electrolytic deposition method and the like, each treatment and recovery method comprises the technical means, equipment and different implementation steps, and due to the poor electric effect of the high-price chromium metal ions, 70-90% of chromic acid is taken out of a recovery tank and a cleaning tank in the electroplating process, the proper recovery treatment can be reused, and the harm to the environment can be reduced.
The existing recovery processing system applied to the chromium plating bath and the recovery tank is an evaporation concentration method, which is the simplest and most effective recovery processing technology, and a heater and an atmospheric evaporator or a vacuum evaporator are arranged in a closed system communicating the plating bath and the recovery tank, so that waste liquid containing hexavalent chromium metal ions can be concentrated and then recovered into the plating bath in a proper amount to supplement the concentration of the plating bath; in the case of an open system, the treated water is almost free of pollution and can be discharged to the natural world. The disclosed technologies include, for example, a waste liquid treatment system of M557747 electroplating process, I655325 electroplating equipment, CN1807266 electroplating wastewater treatment method, etc.; however, how to increase the recovery rate of hexavalent chromium metal ions and improve the recycling of water resources is a problem that needs to be overcome in the art.
Disclosure of Invention
The main object of the present invention is to provide a recycling system and a recycling method for electroplating waste liquid, which can be constructed as a closed recycling system, and can recycle the leaching solution (waste liquid) from the recycling tank through a collecting tank, a recycling tank, an atmospheric concentration tower and a cooling device for heating and evaporative concentration, thereby obtaining a recyclable concentrated stock solution and recycled water, and achieving the purpose of increasing the recovery rate of hexavalent chromium ions and the recovery rate of recycled water.
In order to achieve the above object, the electroplating waste liquid recycling system of the present invention includes an electroplating apparatus, a circulation tank, a collecting tank, an atmospheric concentration tower, a cooling device and a fan, wherein the system is configured to evaporate and concentrate a liquid of the electroplating apparatus into a concentrated solution through the atmospheric concentration tower, and the cooling device condenses the concentrated solution into a recycling water, and then recycles the recycling water to the electroplating apparatus through the collecting tank and the circulation tank, and the preferred technical scheme of the system includes:
the electroplating equipment is provided with an electroplating bath and a plurality of recovery tanks, wherein the electroplating bath is used for accommodating electroplating solution containing metal ions; the recovery tank is adjacent to the electroplating bath and is used for containing immersion cleaning liquid for immersing workpieces;
the circulating groove is used for accommodating the concentrated stock solution recovered from the collecting groove and is connected with the electroplating groove through a first circulating flow passage, and the first circulating flow passage is used for enabling the concentrated stock solution of the circulating groove to perform circulating flow exchange with electroplating solution of the electroplating groove so as to improve the metal ion concentration of the electroplating solution;
the collecting tank is used for accommodating the concentrated stock solution recovered from the atmospheric concentration tower and is connected with the circulating tank through a second circulating flow passage, and the second circulating flow passage is used for enabling the concentrated stock solution of the collecting tank and the concentrated stock solution of the circulating tank to perform circulating flow exchange so as to improve the metal ion concentration of the concentrated stock solution of the circulating tank and reduce the temperature of the concentrated stock solution of the circulating tank; the collecting tank is connected with the recovery tank through a liquid outlet flow passage and is used for leading the immersion liquid of the recovery tank to flow to the collecting tank and be mixed with the concentrated stock solution; a circulating heater is arranged in the collecting tank and is used for circularly heating the concentrated stock solution flowing into the collecting tank to reach a first temperature;
the atmospheric concentration tower is connected with the collecting tank through a third circulating pipeline, the third circulating pipeline is provided with a third pump and a second heater, and the second heater heats the concentrated stock solution in the third circulating pipeline to reach a second temperature and then sprays the concentrated stock solution into the atmospheric concentration tower; the atmosphere concentration tower is internally provided with a collecting device which is used for separating the concentrated stock solution into concentrated stock solution and water vapor and then recycling the concentrated stock solution to the collecting tank through the third circulating pipeline;
the cooling device is connected with the atmospheric concentration tower through a first air pipe and is used for guiding the water vapor into the cooling device so as to cool the water vapor into the recovered water; the cooling device is communicated with the electroplating equipment through a water recovery pipeline and is used for making the recovered water flow back to the electroplating equipment; and the fan is connected with the cooling device through a second air pipe and used for driving the water vapor to pass through the cooling device.
In order to achieve the above object, the recycling method of electroplating waste liquid according to the present invention comprises the above electroplating waste liquid recycling system, and comprises the following steps:
(S1) recovering the leaching solution by flowing the leaching solution of the recovery tank to the collecting tank through the outlet flow path to be mixed with the concentrated source solution of the collecting tank;
(S2) circulating heating the collection tank by the circulating heater to a first temperature for the concentrated stock solution in the collection tank;
(S3) heating for the second time, wherein the concentrated stock solution at the first temperature in the collecting tank is communicated to the third circulating pipeline, and the concentrated stock solution in the third circulating pipeline is heated by the second heater to reach a second temperature and then is sprayed into the atmospheric concentration tower;
(S4) concentrating to obtain concentrated solution, wherein the concentrated solution with higher metal ion concentration and water vapor are separated by a collecting device in the atmospheric concentration tower;
(S5) returning the concentrated stock solution to the collecting tank, wherein the concentrated stock solution which falls to the collecting tray and is higher in metal ion concentration is recycled to the collecting tank through the third circulating pipeline, so that the concentration of the concentrated stock solution in the collecting tank is increased;
(S6) returning the concentrated raw solution to the circulation tank, wherein the concentrated raw solution in the collection tank and the concentrated raw solution in the circulation tank perform circulation flow exchange to increase the metal ion concentration of the concentrated raw solution in the circulation tank and decrease the concentrated raw solution in the circulation tank to a third temperature;
(S7) recycling the concentrated solution to the plating tank by circulating the concentrated solution in the circulation tank and the plating solution in the plating tank so that the concentrated solution in the circulation tank is recycled to the plating tank to increase the metal ion concentration of the plating solution.
The electroplating waste liquid recycling system and the recycling method thereof can achieve the following effects:
and (I) circularly heating the concentrated stock solution in the tank to a first temperature by a circulating heater of the collecting tank, and instantly heating the concentrated stock solution to a second temperature by a second heater again before spraying the concentrated stock solution into the atmospheric concentration tower, so that the yield of water vapor can be increased, and the atmospheric concentration tower can perform evaporation concentration more efficiently.
And (II) the collecting tank and the atmospheric concentration tower can perform circulating evaporation concentration so as to improve the concentration of the collecting tank and enable the recovery rate of hexavalent chromium metal ions to be nearly 99%.
Thirdly, the circulating tank and the collecting tank are in circulating flow exchange, and the temperature (25-40 ℃) for recovering the concentrated stock solution of the electroplating tank is reduced; and then, when the circulating groove is in circulating flow exchange with the electroplating groove, the working temperature of the electroplating solution of the electroplating groove is not increased, and the working temperature in the electroplating groove is stably maintained between 25 and 40 ℃.
And (IV) condensing the rest water-containing vapor by the atmosphere through a high-efficiency cooling device to obtain recovered water, and then returning the recovered water to a recovery tank of the electroplating equipment.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic block diagram of a recycling system for electroplating effluent according to a preferred embodiment of the present invention.
FIG. 2 is a schematic diagram of an atmospheric concentrating tower and cooling device according to a preferred embodiment of the present invention.
FIG. 3 is a schematic view of a preferred embodiment of the circulation heater of the collection tank of the present invention.
FIG. 4 is a schematic flow chart of the method for recycling and treating electroplating waste liquid according to the present invention.
Reference numerals:
A circulation tank 20, a first circulation flow path 21, a first overflow structure 211, a first circulation pipe 212, a first pump 213
A collecting tank 30, a second circulation flow passage 31, a second overflow structure 311, a second circulation pipe 312, a second pump 313, a liquid outlet flow passage 32, a circulation heater 33
An atmospheric concentration tower 40, a third circulation pipeline 41, a third liquid outlet pipe 411, a third liquid return pipe 412, a third pump 42, a second heater 43, a collecting device 44 and a collecting tray 45
A cooling device 50, a first air duct 51, a water recovery pipeline 52
A fan 60 and a second air duct 61.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.
Referring to fig. 1, a preferred embodiment of the recycling system for electroplating effluent according to the present invention comprises an electroplating apparatus 10, a circulation tank 20, a collection tank 30, an atmospheric concentration tower 40, a cooling device 50 and a blower 60, wherein the atmospheric concentration tower 40 is used to evaporate and concentrate the liquid of the electroplating apparatus 10 into a concentrated solution with a higher concentration of chromium metal ions (hexavalent chromium, particularly chromic acid), and the cooling device 50 is condensed into recycled water, and the concentrated solution is recycled to the electroplating apparatus 10 through the collection tank 30 and the circulation tank 20, and the cooling device 50 is used to recycle the recycled water to the electroplating apparatus 10, wherein:
the electroplating equipment 10 is provided with an electroplating bath 11, a plurality of adjacent recovery tanks 12 and a plurality of adjacent cleaning tanks 13; the plating bath 11 is preferably a chromium plating bath for accommodating an electroplating solution required for chromium plating on the surface of the workpiece, and the workpiece is subjected to chromium plating operation in the plating bath 11; the recycling tank 12 is adjacent to the plating tank 11, and preferably has a plurality of recycling tanks 12, each of which is used for containing an immersion liquid (water), and when the workpiece is taken out from the plating tank 11 (chrome plating tank), the workpiece is sequentially placed into the recycling tanks 12 to be immersed in the immersion liquid, so that chromic acid brought out by the workpiece falls into the immersion liquid in the recycling tanks 12; the cleaning tank 13 is disposed at the rear end of the recycling tank 12, and contains a cleaning liquid for cleaning the workpiece.
The circulation tank 20 is used for accommodating the concentrated solution recovered from the collection tank 30, and is connected to the plating tank 11 through a first circulation flow passage 21, and the first circulation flow passage 21 is used for circulating and flowing exchange between the concentrated solution in the circulation tank 20 and the plating solution in the plating tank 11, so that the recovered concentrated solution is recovered to the plating tank 11 for use, thereby increasing the metal ion concentration of the plating solution, and supplementing the consumption amount of the metal ions in the plating solution by the workpiece to achieve a concentration suitable for performing the chromium plating operation. Wherein the first circulation flow path 21 includes a first overflow structure 211, a first circulation pipe 212 and a first pump 213; the first overflow structure 211 is a flow guiding channel that is guided to the circulation tank 20 after the plating tank 11 is filled up (or guided to the plating tank 11 after the circulation tank 20 is filled up), so that the plating tank 11 and the circulation tank 20 can flow by themselves; the first circulation pipe 212 connects the plating tank 11 and the circulation tank 20, and the first pump 213 is disposed on the first circulation pipe 212 for forcing the concentrated solution of the circulation tank 20 to circulate and exchange with the plating solution of the plating tank 11, such as the plating solution of the plating tank 11 flows into the circulation tank 20 through the first overflow structure 211, and the concentrated solution of the circulation tank 20 flows into the plating tank 11 through the first circulation pipe 212 and the first pump 213.
The collecting tank 30 is used for accommodating the concentrated raw solution recovered from the atmospheric concentration tower 40, and is connected to the circulation tank 20 through a second circulation flow passage 31, the second circulation flow passage 31 is used for circulating and flow-exchanging the concentrated raw solution of the collecting tank 30 with the concentrated raw solution of the circulation tank 20, so as to increase the metal ion concentration of the concentrated raw solution of the circulation tank 20 and reduce the temperature of the concentrated raw solution of the circulation tank 20; the collecting tank 30 is further connected to the recovering tank 12 through a liquid outlet channel 32, for making the immersion liquid of the recovering tank 12 flow to the collecting tank 30 and mix with the concentrated stock solution for evaporation concentration; the collecting tank 30 is provided with a circulating heater 33 for circularly heating the concentrated solution flowing into the collecting tank 30 to a first temperature (50-60 ℃). Wherein the second circulation flow path 31 preferably includes a second overflow structure 311, a second circulation pipe 312 and a second pump 313; the second overflow structure 311 can be a diversion flow path for diversion to the collecting tank 30 after the circulation tank 20 is full (or diversion to the circulation tank 20 after the collecting tank 30 is full), so that the circulation tank 20 and the collecting tank 30 can self-circulate; the second circulation pipe 312 connects the circulation tank 20 and the collection tank 30, and the second pump 313 is disposed on the second circulation pipe 312 for forcing the concentrated solution of the collection tank 30 to perform a circulation flow exchange with the concentrated solution of the circulation tank 20, for example, the concentrated solution of the circulation tank 20 flows into the collection tank 30 through the second overflow structure 311, and the concentrated solution of the collection tank 30 flows into the circulation tank 20 through the second circulation pipe 312 and the second pump 313, so as to perform a circulation flow exchange.
Referring to fig. 1 and 2, the atmospheric concentration tower 40 is connected to the collecting tank 30 through a third circulation pipeline 41, the third circulation pipeline 41 is provided with a third pump 42 and a second heater 43, and the second heater 43 is used for heating the concentrated stock solution in the third circulation pipeline 41 to a second temperature (80-90 ℃) and then spraying the concentrated stock solution into the atmospheric concentration tower 40; a collecting device 44 and a collecting tray 45 are arranged in the atmospheric concentration tower 40, the collecting device 44 comprises two stoppers 441, a plurality of raschig rings (Packing) are arranged in the stoppers for concentrating into a concentrated stock solution with higher metal ion concentration, and the rest of water vapor is discharged to the cooling device 50; the collection tray 45 is disposed below the collection device 44, and is used for collecting the concentrated raw liquid to further return to the collection tank 30 through the third circulation line 41. The third circulation pipeline 41 includes a third liquid outlet pipe 411 and a third liquid return pipe 412, the third liquid outlet pipe 411 and the third liquid return pipe 412 are connected between the collecting tank 30 and the atmospheric concentration tower 40, and the second pump 42 and the second heater 43 are disposed in the third liquid outlet pipe 411.
Referring to fig. 1 and 2, the cooling device 50 is connected to the atmospheric concentration tower 40 through a first air duct 51, and is configured to introduce the water vapor passing through the collecting device 44 inside the atmospheric concentration tower 40 into the cooling device 50, and the cooling device 50 is connected to an external refrigerator (not shown) to receive a refrigerating fluid, so that the water vapor is cooled in the cooling device 50 into recovered water; the cooling device 50 is connected to the recovery tank 12 or the cleaning tank 13 of the electroplating apparatus 10 through a water recovery pipeline 52, for example, the immersion cleaning solution filling the recovery tank 12 or the rinse solution of the cleaning tank 13, so as to recycle the recovered water. The fan 60 is connected to the cooling device 50 through a second air duct 61, and is used for driving the water vapor to be cooled into recycled water through the cooling device 50, and discharging the cooled dry air.
Referring to fig. 3, the above-mentioned preferred embodiment of the circulation heater 33 of the collecting tank 30 includes a circulation heating pipe 331, a fourth pump 332 and a first heater 333, two ends of the circulation heating pipe 331 are connected to the collecting tank 30, the fourth pump 332 and the first heater 333 are disposed on the circulation heating pipe 331, so that the concentrated raw liquid in the collecting tank 30 is driven to flow through the first heater 333 by the fourth pump 332, and the concentrated raw liquid in the collecting tank 30 is heated to the first temperature in a circulation manner.
Referring to fig. 4, when the electroplating waste liquid recovery processing system of the present invention is used for performing a waste liquid recovery processing method, the following steps are sequentially performed:
(S1) recovering the leaching solution, wherein the leaching solution can flow to the collecting tank 30 to be mixed with the concentrated source solution in the collecting tank 30 when the leaching solution in the collecting tank 12 overflows (the overflowed leaching solution is waste liquid) through the structure of the liquid outlet channel 32 communicated with the collecting tank 30;
(S2) circularly heating the collecting tank, namely, when the concentration of the concentrated source liquid in the collecting tank 30 is reduced due to the mixing with the immersion liquid and evaporation and condensation are started, starting the circulating heater 33 to circularly heat the concentrated raw liquid in the collecting tank 30 to a first temperature (50-60 ℃) so as to keep the concentrated source liquid in the collecting tank 30 at the first temperature;
(S3) heating for the second time, wherein the concentrated stock solution at the first temperature in the collecting tank 30 is circulated to the third liquid outlet pipe 411 of the third circulating pipeline 41, so that the concentrated stock solution in the third liquid outlet pipe 411 is instantly heated by the second heater 43 to reach a second temperature (80-90 ℃), and then sprayed into the atmospheric concentration tower 40 along the third liquid outlet pipe 411;
(S4) concentrating again to obtain concentrated solution, wherein the collecting device 44 in the atmospheric concentration tower 40 can separate the concentrated solution with higher metal ion concentration and water vapor, and the concentrated solution with higher metal ion concentration falls to the collecting tray 45 for concentration;
(S5) returning the concentrated raw solution to the collection tank, wherein the concentrated raw solution which falls on the collection tray 45 and is higher in concentration of metal ions is recovered to the collection tank 30 through the third liquid return pipe 412 of the third circulation pipeline 41, so that the concentration of the concentrated raw solution in the collection tank 30 is increased; in the above, if the concentration of the collecting tank 30 is not enough, the steps (S2) to (S5) are repeated a plurality of times to increase the concentration of the concentrated stock solution in the collecting tank 30 to the set concentration;
(S6) returning the concentrated solution to the circulation tank, wherein when the concentration of the collection tank 30 reaches a predetermined value, the concentrated solution of the collection tank 30 is subjected to a circulating flow exchange with the concentrated solution of the circulation tank 20 to increase the metal ion concentration of the concentrated solution of the circulation tank 20 and lower the concentrated solution to a third temperature (25 to 40 ℃) in the circulation tank 20; that is, the step (S6) may be repeated a plurality of times to increase the concentration of the concentrated solution in the circulation tank 20 to a predetermined concentration;
(S7) recycling the concentrated solution to the plating tank, wherein when the concentration and temperature of the concentrated solution in the circulation tank 20 reach set values, the circulation tank 20 and the plating solution in the plating tank 11 are subjected to circulation flow exchange, so that the concentrated solution in the circulation tank 20 is recycled to the plating tank 11, and the concentration of metal ions in the plating solution is increased to reach the standard of the concentration of the plating operation; the above (S7) step is repeatedly performed a plurality of times to increase the plating liquid in the plating vessel 11 to a set concentration;
(S8) generating recycled water, wherein the water vapor in the atmospheric concentration tower 40 flows to the cooling device 50 through the first air duct 51, the cooling device 50 inputs 0-5 ℃ refrigerating fluid from an external refrigerator to exchange heat with the water vapor to condense and generate recycled water, and the recycled water is returned to the recycling tank 12 or the cleaning tank 13 of the electroplating equipment 10 through the water recycling pipeline 52, thereby achieving the effect of recycling the waste water.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. The utility model provides an electroplating effluent recovery processing system which characterized in that: the device comprises an electroplating device, a circulating tank, a collecting tank, an atmospheric concentration tower, a cooling device and a fan, wherein the liquid of the electroplating device is evaporated and concentrated into concentrated stock solution through the atmospheric concentration tower, the cooling device is condensed into recovered water, and the concentrated stock solution is recovered to the electroplating device through the collecting tank and the circulating tank, wherein:
the electroplating equipment is provided with an electroplating bath and a plurality of recovery tanks, wherein the electroplating bath is used for accommodating electroplating solution containing metal ions; the recovery tank is adjacent to the electroplating bath and is used for containing immersion cleaning liquid for immersing workpieces;
the circulating groove is used for accommodating the concentrated stock solution recovered from the collecting groove and is connected with the electroplating groove through a first circulating flow passage, and the first circulating flow passage is used for enabling the concentrated stock solution of the circulating groove to perform circulating flow exchange with electroplating solution of the electroplating groove so as to improve the metal ion concentration of the electroplating solution;
the collecting tank is used for accommodating the concentrated stock solution recovered from the atmospheric concentration tower and is connected with the circulating tank through a second circulating flow passage, and the second circulating flow passage is used for enabling the concentrated stock solution of the collecting tank and the concentrated stock solution of the circulating tank to perform circulating flow exchange so as to improve the metal ion concentration of the concentrated stock solution of the circulating tank and reduce the temperature of the concentrated stock solution of the circulating tank; the collecting tank is connected with the recovery tank through a liquid outlet flow passage and is used for leading the immersion liquid of the recovery tank to flow to the collecting tank and be mixed with the concentrated stock solution; a circulating heater is arranged in the collecting tank and is used for circularly heating the concentrated stock solution flowing into the collecting tank to reach a first temperature;
the atmospheric concentration tower is connected with the collecting tank through a third circulating pipeline, the third circulating pipeline is provided with a third pump and a second heater, and the second heater heats the concentrated stock solution in the third circulating pipeline to reach a second temperature and then sprays the concentrated stock solution into the atmospheric concentration tower; the atmosphere concentration tower is internally provided with a collecting device which is used for separating the concentrated stock solution into concentrated stock solution and water vapor and then recycling the concentrated stock solution to the collecting tank through the third circulating pipeline;
the cooling device is connected with the atmospheric concentration tower through a first air pipe and is used for guiding the water vapor into the cooling device so as to cool the water vapor into the recovered water; the cooling device is communicated with the electroplating equipment through a water recovery pipeline and is used for making the recovered water flow back to the electroplating equipment; and the fan is connected with the cooling device through a second air pipe and used for driving the water vapor to pass through the cooling device.
2. The plating waste liquid recovery processing system according to claim 1, characterized in that: wherein the first circulation flow passage comprises a first overflow structure, a first circulation pipe and a first pump; the first overflow structure enables the electroplating bath to flow through the circulation tank by itself, and the first circulation pipe is connected with the electroplating bath and the circulation tank; the first pump is arranged on the first circulating pipe and is used for forcing the concentrated stock solution of the circulating groove to perform circulating flow exchange with the electroplating solution of the electroplating groove.
3. The plating waste liquid recovery processing system according to claim 1 or 2, characterized in that: the second circulating flow passage comprises a second overflow structure, a second circulating pipe and a second pump, the second overflow structure enables the circulating tank and the collecting tank to automatically circulate, the second circulating pipe is connected with the circulating tank and the collecting tank, and the second pump is arranged on the second circulating pipe and used for forcing the concentrated stock solution of the collecting tank and the concentrated stock solution of the circulating tank to circularly flow and exchange.
4. The plating waste liquid recovery processing system according to claim 1, characterized in that: the circulating heater comprises a circulating heating pipe, a fourth pump and a first heater, two ends of the circulating heating pipe are communicated with the collecting tank, and the fourth pump and the first heater are arranged on the circulating heating pipe.
5. The plating waste liquid recovery processing system according to claim 1, characterized in that: wherein the electroplating equipment comprises a plurality of cleaning tanks, and the cleaning tanks are adjacent to the recovery tank; and the water recycling pipeline is communicated with the recycling tank or the cleaning tank and is used for recycling the recycling water to the recycling tank or the cleaning tank for reuse.
6. The plating waste liquid recovery processing system according to claim 1, characterized in that: wherein the collecting device in the atmospheric concentration tower comprises two interceptors for separating into the concentrated stock solution; and a collecting tray for collecting the concentrated stock solution to return to the collecting tank.
7. A method for recycling and treating electroplating waste liquid is characterized by comprising the following steps: which comprises the plating waste liquid recovery processing system according to any one of claims 1 to 6 and performs the steps of:
(S1) recovering the leachant by flowing the leachant of the recovery tank to the collection tank through the effluent passage to mix with the concentrated source liquid of the collection tank;
(S2) circulating heating the collection tank by the circulating heater to a first temperature for the concentrated stock solution in the collection tank;
(S3) heating for the second time, wherein the concentrated stock solution at the first temperature in the collecting tank flows to the third circulating pipeline, and the concentrated stock solution in the third circulating pipeline is heated by the second heater to reach a second temperature and then is sprayed into the atmospheric concentration tower;
(S4) concentrating to obtain concentrated solution, wherein the concentrated solution with higher metal ion concentration and water vapor are separated by a collecting device in the atmospheric concentration tower;
(S5) returning the concentrated stock solution to the collecting tank, wherein the concentrated stock solution which falls to the collecting tray and is higher in metal ion concentration is recycled to the collecting tank through the third circulating pipeline, so that the concentration of the concentrated stock solution in the collecting tank is increased;
(S6) returning the concentrated raw solution to the circulation tank, wherein the concentrated raw solution in the collection tank and the concentrated raw solution in the circulation tank are subjected to circulation flow exchange to increase the metal ion concentration of the concentrated raw solution in the circulation tank and reduce the concentrated raw solution in the circulation tank to a third temperature;
(S7) returning the concentrated raw solution to the plating tank by circulating the concentrated raw solution in the circulation tank and the plating solution in the plating tank so that the concentrated raw solution in the circulation tank is returned to the plating tank to increase the metal ion concentration of the plating solution.
8. The method for recovering and treating the plating waste liquid according to claim 7, characterized by comprising: wherein the steps (S2) to (S5) are repeated a plurality of times to increase the concentrated stock solution in the collecting tank to a set concentration; (S6) repeating the steps a plurality of times to increase the concentration of the concentrated solution in the circulation tank to a predetermined concentration; and (S7) repeating the steps a plurality of times to increase the concentration of the plating liquid in the plating tank to a predetermined concentration.
9. The method for recovering and treating the plating waste liquid according to claim 7 or 8, characterized by comprising: and (S8) generating recovered water, wherein the water vapor flows to the cooling device through the first air pipe, the cooling device applies 0-5 ℃ refrigerating fluid to exchange heat with the water vapor to condense and generate the recovered water, and the recovered water flows back to the electroplating equipment through the water recovery pipeline.
10. The method for recovering and treating the plating waste liquid according to claim 7 or 8, characterized by comprising: wherein the first temperature is 50-60 ℃, the second temperature is 80-90 ℃, and the third temperature is 25-40 ℃.
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| TW110114969A TWI756118B (en) | 2021-04-26 | 2021-04-26 | Electroplating waste liquid recycling system and recycling method |
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| CN103060884A (en) * | 2013-01-14 | 2013-04-24 | 无锡市星亿涂装环保设备有限公司 | Chromic acid recycling treatment system and process in hard chrome plating production line |
| CN111690976A (en) * | 2020-07-20 | 2020-09-22 | 无锡进帆环保科技有限公司 | Electroplating bath liquid management, concentration and reuse process |
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| CN101967014A (en) * | 2010-07-06 | 2011-02-09 | 无锡出新环保设备有限公司 | Electroplating effluent atmosphere concentration unit |
| TW201904876A (en) * | 2017-06-26 | 2019-02-01 | 達幸企業有限公司 | Nickel waste liquid and treatment method of Nickel washing water enabling nickel plating waste liquid and the Nickel washing water to be reused |
| CN111573942A (en) * | 2020-04-30 | 2020-08-25 | 杭州临安兴旺电镀有限公司 | Method for recycling copper-nickel electroplating waste liquid |
| TWM616448U (en) * | 2021-04-26 | 2021-09-01 | 玉蓮企業股份有限公司 | Electroplating waste liquid recycling and treatment system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103060884A (en) * | 2013-01-14 | 2013-04-24 | 无锡市星亿涂装环保设备有限公司 | Chromic acid recycling treatment system and process in hard chrome plating production line |
| CN111690976A (en) * | 2020-07-20 | 2020-09-22 | 无锡进帆环保科技有限公司 | Electroplating bath liquid management, concentration and reuse process |
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