New process for recycling electroplating wastewater through carrying out evaporation concentration at reduced pressure

• Main Authors: DAI DUIWU, ZHANG WANCAI, CHENG SHENGYUAN, DONG XIN
• Format: Patent
• Language: Chinese; English
• Published: 08.06.2016
• Subjects: CHEMISTRY; METALLURGY; TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE

The invention discloses a new process for recycling electroplating wastewater through carrying out evaporation concentration at reduced pressure. According to the new process, electroplating waste liquid and waste water are collected in a reclaiming tank through centralized collection, the reclaiming tank is connected with an evaporation concentration device through a pipeline, a vacuum state is formed in an evaporating tube by a vacuum system, the waste water in the reclaiming tank is sucked in glass vacuum evaporation concentrating equipment for evaporation concentration, the waste water is subjected to evaporative condensing in the vacuum state so as to produce concentrate and condensed water, the interior of the evaporation concentrating equipment has the vacuum degree of 2*10 Pa to 8*10 Pa and the vapor pressure of 0.02MPa to 0.10MPa, the condensed water flows into a condensed water tank, the condensed water in the condensed water tank flows into a multistage counterflow rinsing tank for washing along a