Method for recovering chromic acid and water from chromeplating rinse water
A technology for rinsing water and water resources, applied in chromium oxide/hydrate, heating water/sewage treatment, chromium trioxide, etc., can solve the problems of wasting chromic acid and water resources, heavy cost pressure, poor effluent quality, etc. The effect of reducing final emissions, saving chemical costs, and saving energy
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[0021] The present invention will be further described below in conjunction with specific examples.
[0022] The present invention reclaims the method for chromic acid and water resources from chrome-plated rinsing water and comprises the following steps:
[0023] Step 1, the plated parts in the chromium plating tank enter the water washing recovery tank at the first stage, the next water washing recovery tank until the final water washing recovery tank, and use pure water to perform countercurrent rinsing on the same plated parts step by step. The rinsing water in the washing recovery tank returns to the upper level washing recovery tank, and flows back step by step, and finally returns to the washing recovery tank located at the first stage;
[0024] Step 2, the chrome-plated rinsing water in the washing recovery tank at the first stage overflows to the circulation recovery tank, and a heating device is installed in the circulation recovery tank to heat the chrome-plating ri...
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