Purification device for recovering basic cupric carbonate from acid etching waste liquid and application method thereof

Abstract

The invention discloses a purification device for recovering basic cupric carbonate from acidic etching waste liquid and an application method thereof. The device comprises a centrifuge, a circulatingprecipitation tank, a membrane filtration system, a first pump and a second pump, wherein the centrifuge is provided with a feeding port, a liquid outlet and a liquid storage tank; the circulating precipitation tank is provided with a first liquid inlet, a filtering outlet, a filtering inlet and a precipitate outlet; the membrane filtration system is provided with a second liquid inlet, a concentrated liquid outlet and a clear liquid outlet; one end of the first pump communicates with the filtering outlet, and the other end of the first pump communicates with the first liquid inlet; the concentrated liquid outlet communicates with the filtering inlet; and one end of the second pump communicates with the precipitate outlet, and the other end of the second pump communicates with the feedingport. According to the invention, separation liquid is subjected to circulating concentration, so a centrifugal liquid amount is reduced, the content of basic cupric carbonate is increased, treatmenttime is shortened by 70%, and a single-day treatment amount of the acid etching waste liquid is increased.

Description

technical field [0001] The disclosure relates to the field of waste liquid treatment design, in particular to a purification device for recovering basic copper carbonate from acidic etching waste liquid and a method for using the same. Background technique [0002] The copper printed circuit board can corrode the exposed metal copper according to the pre-designed circuit diagram through the etching process, and the remaining copper after etching is the finished product of the same circuit board. During the etching process, the concentration of copper ions in the etching solution continues to increase, and the corrosion efficiency of the etching solution also decreases. When the concentration of copper ions in the etching solution reaches saturation, the etching solution can no longer be used for the preparation of copper printed circuit boards. , and discharged as waste. Acidic copper printed circuit board etching waste liquid has been included in the "National Hazardous Wa...

AI Technical Summary

Problems solved by technology

Acidic copper printed circuit board etching waste liquid has been included in the "National Hazardous Waste List" (hazardous waste number is HW22), if these containing a large amount of metal copper ions are put into the etching waste liquid and discharged without treatment, it will not only cause waste of resources , increasing the cost of subsequent sewage treatment

[0003] At present, the treatment of acidic etching waste liquid is mainly to convert the copper ions in the acidic etching waste liquid into basic copper carbonate. In the process of obtaining the finished product of basic copper carbonate, the basic carbonate needs to be centrifuged, but The separated liquid still contains more basic copper carbonate. If this part of the separated liquid is discharged directly, it will also cause pollution to the environment, and further separation treatment is required.

At present, precipitation separation is used to finely place the separation liquid and use gravity to precipitate the basic copper carbonate in it. It takes a long time, the processing capacity is limited, and the processing efficiency is slow, which seriously affects the recovery and processing efficiency of acidic etching waste liquid.

Patent No.: 201510815459.1, a method for recovering basic copper carbonate from circuit board acidic etching waste liquid, discloses a method for recovering basic copper carbonate from acidic etching waste liquid, but does not disclose Device and method for purifying separation liquid containing copper

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