KR200289109Y1 - Apparatus for extraction of Precious metals from Plating Wastewater - Google Patents

Abstract

The present invention relates to an apparatus capable of recovering valuable metals in plating wastewater using ion exchange fibers and electrolytic devices.

In particular, it selectively supplies the plating wastewater to the first and second ion exchange fiber chambers through a supply pump installed to the lower side of the plating wastewater collection tank into which the plating wastewater flows, and the fibers of the first and second ion exchange fiber chambers. The plating wastewater supplied to the support is selectively supplied to the cylindrical fiber support through opening and closing of the solenoid valve installed in the supply pipe, and then collects valuable metals in the plating wastewater introduced through the ion exchange fiber, and the plating wastewater flows in. In the non-chambered chamber, the cleaning solution of the fiber cleaning solution collection tank is supplied to the cleaning solution supply pipe at the center of the fiber support part to backwash the ion exchange fibers, and the backwashed valuable metal anion solution is introduced into the electrolyte tank, and the valuable metal in the solution is removed by electrolysis. Waste water from which valuable metals are removed through the chamber is recovered through a supply pipe. Burrow flows would be to completely remove the trace amounts of valuable metals recovered in the washing water through an activated carbon filter and micro-filter water tank.

Description

Apparatus for extraction of Precious metals from Plating Wastewater}

The present invention can easily recover the valuable metals in the plating wastewater by using ion exchange fibers such as strongly acidic cationic fibers in which the valuable metals in the plating wastewater are collected, and an electrolytic device into which the cleaning liquid backwashed with the ion exchange fibers flows. The present invention relates to a recovery method and a device for recovering valuable metals, and in particular, plating wastewater flowing into a plating wastewater collection tank selectively passes through first and second anion exchange fiber chambers in which ion exchange fibers are installed through supply pipes. The ions are collected, and the ion exchange fibers in the first and second anion exchange fiber chambers are backwashed through a cleaning liquid and supplied to the electrolytic cell, and then, valuable metal ions introduced with the washing water into the electrolytic cell are recovered by electrolysis. By recycling the plating wastewater, the valuable metal in the plating wastewater can be recovered easily and easily. The present invention relates to an apparatus for recovering valuable metals in a plating wastewater using ion exchange fibers that can contribute to cost reduction while preventing environmental pollution.

In general, in the process of performing a plating on a substrate during the manufacture of a semiconductor and a semiconductor component or a printed circuit board, the surface of the plating is washed with a non-ionic water after the plating operation, which occurs during the washing of the plating site. Whereas the plating metal is present in the plating wastewater to be discharged, in most cases, the plating metal is discharged after the wastewater treatment without proper recovery.

That is, conventional methods for treating wastewater containing heavy metals include methods using reverse osmosis membranes and evaporation concentration methods. However, these methods have a high initial investment cost and excessive operating costs compared to chemical treatments. Is there.

In the method of treating the wastewater containing heavy metals by using the reverse osmosis membrane, the heavy metal wastewater is treated in parallel with other wastewater treatments, and the operation of the wastewater is relatively less affected by the characteristics of the wastewater and the automation of operation is possible. And, there is an advantage that the amount of sludge generated is small, but before and after treatment process and secondary concentration, drying facility is required, there is a problem that even the effective component in the cleaning solution is removed and the replacement of consumables such as microfilters is frequent.

In addition, in the case of the method for treating heavy metal-containing wastewater by the evaporation and concentration of the water, a separate heater for evaporation of the wastewater is required, resulting in excessive facility costs, particularly high energy costs and inefficient There is a disadvantage.

In particular, when manufacturing the lead frame, the plating wastewater generated in the cleaning process of the lead frame contains about 50 ppm or more of silver, but because it is processed without a separate recovery process, the recovery rate of the high-purity valuable metal is very low. There were many problems.

The present invention has been devised to improve the above-described conventional problems, the purpose of which is to fundamentally block the soil pollution and water pollution due to the metal contained in the plating waste water generated in the plating process, Ion that can easily recover valuable metals contained in the plating wastewater and reuse them, thereby increasing the efficiency of resources and recycling the plating wastewater into washing water, thereby saving resources and preventing the generation of wastewater. It is to provide a valuable metal recovery device in the plating wastewater using the exchange fiber.

1 is a schematic configuration diagram of a valuable metal recovery device for explaining the valuable metal recovery process in the plating wastewater using the ion exchange fiber according to the present invention.

2 is a view showing the internal structure of the first and second ion exchange fiber chamber of the present invention.

<Explanation of symbols for the main parts of the drawings>

10 ... plating waste water collection tank 20 ... plating waste water

30.Supply line 31,31 ... 1st and 2nd supply line

40 ... supply pump 50,60 ... first and second ion exchange fiber chamber

70 Solenoid chamber 80 Ion exchange fiber

90.Solution supply pipe

100.Textile recycling solution sump 110.Pressure pump

120 Electrolytic tank 130 Electrolyte

140 Power 150,150 'electrode terminals

160 ... heater 170 ... Cation Exchange Fiber Chamber

180 ... Activated Carbon Filter 180 '... Micro Filter

190 ... Wash water catcher 200 ... Fiber support

210.Cleaning supply pipe

L1, L2 ... level control sensor

As a technical means for achieving the above object, the present invention, the plating wastewater is introduced into the supply pump is installed on the lower side to be transported through the supply pipe, plating wastewater collection tank is installed on one side wall level control sensor;

Cylindrical fiber support part is installed to the plating water collection tank and supply pipe and is filled with ion exchange fiber composed of strongly acidic cationic fiber, and a spray nozzle for spraying a cleaning liquid for cleaning the ion exchange fiber in the center of the fiber support part. The provided cleaning liquid supply pipe is vertically installed, and a supply pipe connected to the plating wastewater collection tank is selectively provided with solenoid valves in the first and second supply pipes so as to supply plating wastewater to the chamber, thereby ion-exchanging valuable metal anions of the plating wastewater. First and second ion exchange fiber chambers installed to adsorb fibers;

A pressure cleaning pump installed on one side of the bottom of the first and second ion exchange fiber chambers, wherein the fiber cleaning solution is filled in the fiber cleaning solution to selectively backwash the ion exchange fibers in the cylindrical fiber support. ;

The solution supply pipe is delivered to supply the valuable metal anion solution backwashed with ion exchange fibers in the chamber, and an electrode terminal plate is installed inside the electrolyte and the power supply to both sides, and a heater is installed at the upper side to be cleaned by electrolysis. An electrolytic tank installed to recover valuable metals in the solution; And

A cation exchange fiber chamber is introduced into the first and second ion exchange fiber chambers and a supply pipe, and a cylindrical fiber support part in which the cation exchange fiber chamber is filled with ion exchange fibers to adsorb a small amount of valuable metal cations is installed therein. On one side of the cation exchange fiber chamber, the washing water collecting tank installed with the activated water filter and the micro filter through the cleaning pipe and the cleaning water is cleaned to collect the wastewater in the plating wastewater using the ion exchange fiber, characterized in that it comprises a By providing a valuable metal recovery device.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a schematic configuration diagram of a valuable metal recovery device for explaining the valuable metal recovery process in the plating wastewater using the ion exchange fiber according to the present invention, Figure 2 is an internal structure of the first and second ion exchange fiber chamber As shown in the drawing, the plating wastewater 20 is introduced into the plating wastewater collection tank 10 so that the supply pump 40 is installed at one lower side of the plating wastewater collection tank 10 so as to be transferred through the supply pipe 30. Water level control sensors (L1) (L2) are respectively installed on the wall.

In addition, the first and second cylindrical fiber support portion 200 is installed to be filled with the ion exchange fiber 80 composed of a strongly acidic cationic fiber inside the speaker to the plated water collection tank 10 and the supply pipe 30 therein 2 The ion exchange fiber chambers 50 and 60 are fibers of the first and second ion exchange fiber chambers 50 and 60 through the first and second supply pipes 31 and 32 extending upward. Solenoid valves 70 are respectively installed in the first and second supply pipes 31 and 32 in which the fiber support part 200 is installed so as to selectively supply plating wastewater to any one of the support parts 200. And a second ion exchange fiber chamber (50) (60) is communicated with the fiber cleaning solution collection tank (100) installed to one side through the solution supply pipe (90), and the first and second ion exchanges as the pressure pump (110). Any one of the fiber chambers 50 and 60 is selectively installed to backwash, wherein the first and second ion exchange fiber chambers 50 In the fiber support part 200 installed inside the) 60, the cleaning solution supply pipe 210 is vertically installed at the center thereof, and the cleaning solution is turned back to the ion exchange fiber 80 through the injection nozzle of the cleaning solution supply pipe 210. Is installed.

Subsequently, above the first and second ion exchange fiber chambers 50 and 60, the solution supply pipe 90 supplies the valuable metal anion solution backed by the ion exchange fiber 80 to the electrolytic tank 120. On both sides of the electrolytic tank 120 to which the electrolyte is filled, the electrolyte 130 is provided with the power supply 140 and the electrode terminal plates 150 and 150 ', which are installed to recover valuable metals, and the electrolytic tank 120. The heater 160 is installed on the upper side.

In addition, the first and second ion exchange fiber chambers 50 and 60 have a cation in which a cylindrical fiber support part 200 is installed so as to fill the ion exchange fiber 80 therein through the supply pipe 30. The exchange fiber chamber 170 is spoken, and on one side of the cation exchange fiber chamber 170, a washing water collection tank 190 through which an activated carbon filter 180 and a micro filter 180 ′ are collected is supplied to the supply pipe 30. ) Through the composition that is addressed.

Referring to the embodiment of the present invention made of such a configuration as follows.

In the manufacture of semiconductors and semiconductor components or printed circuit boards, plating wastewater 20 containing valuable metals such as silver or gold generated in the process of washing the plated portion on the surface may flow into the plating wastewater collection tank 10. In this case, the plating wastewater 20 is transferred through the supply pipe 30 by the operation of the supply pump 40 installed to one side of the plating wastewater collection tank 10, and then fine particles are removed from the intermediate filter. It is supplied to the first and second ion exchange fiber chambers 50 and 60.

The plating wastewater 20 supplied to the first and second ion exchange fiber chambers 50 and 60 is a solenoid installed in the first and second supply pipes 31 and 32 extending from the supply pipe 30. By the opening and closing action of the valve 70, the plating wastewater 20 is selectively supplied into the first and second ion exchange fiber chambers 50 and 60.

At this time, the first and the second ion exchange fiber chamber (50) 60, the inner side as shown in Figure 2, the ion exchange fiber 80 is provided with a cylindrical fiber support 200 to fill the, After the plating wastewater flows into the fiber support 200, the valuable metal in the plating wastewater introduced through the strongly acidic cation exchange fiber 80 is collected.

At this time, in the chambers in which the plating wastewater does not flow in the first and second ion exchange fiber chambers 50 and 60, the cleaning solution of the fiber cleaning solution collection tank 100 is supplied to the solution supply pipe 90 by the operation of the pressure pump 110. It is introduced from the lower portion of the cleaning liquid supply pipe 210 is placed in the center of the fiber support 200 of the chamber through), the ion exchange fibers 80 adsorbed valuable metals through the injection nozzle is backwashed for a predetermined time.

The anion exchange fiber 80, ion exchange fibers as shown in Table 1 may be selected.

As described above, the anion exchange fiber 80 is filled in the fiber support 200 of the first and second ion exchange fiber chambers 50 and 60 to collect valuable metals charged with the charge of the wastewater for plating cleaning. When the saturation is made in accordance with the anion exchange capacity of the ion exchange fiber 80 inside the fiber support 200, the plating waste water 20 is introduced into the other chamber by the action of a sensor (not shown). The anion exchange fiber 80 in the chamber in which the valuable metal ions are collected is injected through the cleaning solution supply pipe 210 which is introduced into the center of the fiber support 200 by the cleaning solution of the fiber cleaning solution collection tank 100. After backwashing the ion exchange fiber 80 through (not shown), the electrolyte is introduced into the electrolyte tank 120 through which the electrolyte is filled through the solution supply pipe 90 above the chamber.

The electrolyte tank 120 is capable of recovering the valuable metal in the valuable metal ion solution introduced by energization of the + − electrode terminal plates 150 and 150 ′ installed on both sides by electrolysis, wherein the electrolyte solution Heater 160 is installed in the tank 120 to heat the electrolyte to 30 ~ 70 ℃, the heating temperature through the heater 160 is less than 30 ℃ and more than 70 ℃ smooth electrolysis is difficult.

Subsequently, the wastewater from which valuable metals have been removed through the first and second ion exchange fiber chambers 50 and 60 is introduced into the cation exchange fiber chamber 170 through the supply pipe 30 and then remains in the waste water flow. After removing a trace amount of valuable metal to the ion exchange fiber 80 of the fiber support 200, impurities in the activated carbon filter 180 and the micro filter 180 'installed at one side of the cation exchange fiber chamber 170 are completely removed. After being removed and reduced to the washing water, it is recovered to the washing water collecting tank 190 and can be reused as the washing water of the plating process.

According to the valuable metal recovery device in the plating wastewater of the present invention as described above, it is possible to fundamentally block the soil pollution and water pollution due to the metal contained in the plating wastewater generated in the plating process, the plating wastewater It is possible to easily recover valuable metals contained in them and to reuse them, thereby increasing the efficiency of the resources, recycling the plating wastewater to the washing water, and consequently, saving the resources and preventing the generation of wastewater. .

Although the present invention has been illustrated and described in connection with specific embodiments, it should be understood that the present invention may be variously modified and changed without departing from the spirit or the scope of the present invention provided by the following claims for utility model registration. Those skilled in the art will want to know easily.

Claims (1)

Plating wastewater is introduced into the inside of the feed pump is installed on the lower side to be transported through the supply pipe, one side wall plating wastewater collection tank is installed water level control sensor; Cylindrical fiber support part installed in the plating wastewater collecting tank and the supply pipe and filled with ion exchange fiber composed of strongly acidic cation fiber is installed therein, the fiber is delayed, and a small amount of valuable metal cation is adsorbed inside the cation exchange fiber chamber. Cylindrical fiber support that is filled with ion-exchange fiber is installed, one side of the cation exchange fiber chamber is a washing water collection tank is installed to collect the washing water is delivered to the supply pipe via the activated carbon filter and micro filter to collect the washing water; Valuable metal recovery apparatus in the plating wastewater using ion exchange fibers, characterized in that configured.