Electroplating wastewater treatment equipment In view of the large amount of comprehensive discharge water in the electroplating industry, the difficult problem of low concentration of harmful substances and the environmental pressure of the implementation of the new standard, the membrane integrated process independently developed by Tianchuang Company carries out hierarchical separation treatment for the comprehensive discharge water of electroplating, thus effectively improving the economy of traditional wastewater treatment technology, not only completely eliminating the low concentration of harmful substances in wastewater, Meet the latest industrial discharge standards, and further advanced treatment, so that wastewater can reach different production and reuse standards.
The passivation concentrate is pumped into the reduction tank by a lift pump. The sulfuric acid solution is added into the reduction tank by a metering pump to make the pH value of the reduction tank reach 2-3. Then the reducing agent sulfite is added into the reduction tank by a metering pump to reduce hexavalent chromium to trivalent chromium.
The passivation solution and pre-treatment after reduction treatment, the washing water for zinc plating and nickel plating enters the large regulating pool. After being fully homogenized in the regulating pool, various waste water is lifted to the reaction pool 1 by the lift pump, and then enters CaCl2 through the metering pump to destroy the complex of Zn2+. In the reaction pool 2, it enters NaOH through the metering pump, and the pH value is adjusted within the range of 9-11. Then the waste water flows into the reaction pool 3, After entering the coagulant aid PAM through the metering pump, it enters the inclined plate sedimentation tank. The metal hydroxide forms sludge and sinks into the sludge hopper. The supernatant flows into the neutralization tank automatically for acid-base regulation. The pH value is adjusted within the range of 6-9 and then discharged. The sludge in the inclined plate sedimentation tank is regularly discharged to the sludge tank, treated into sludge cake by the box filter press, and then transported out for deep burial, and the sludge water returns to the regulating tank