高浓高盐化工废水的资源化综合处理工艺

Comprehensive Treatment of High Strength and High Salinity Chemical Wastewater

介绍了一种高浓高盐化工废水的资源化综合处理工艺,包括以下步骤:将废水集中,加入有机絮凝剂,沉降大颗粒杂质和大部分的悬浮物、漂浮物;加入活性炭吸附剂,吸附有机质;过滤,除去水中的颗粒状杂质、胶体物质和悬浮物,然后通过一级纳滤分离废水中的一二价离子;含一价离子水经过反渗透,制得纯水可作工业用水;浓水经过电渗析进行一价盐的提浓,得到NaCl副产物;含二价离子水进行冷冻结晶,离心后结晶体层经过双级膜电渗析,制得酸碱产物,水层进行纳滤处理;吸附了有机质的饱和吸附剂经过脱水干燥,进行回收利用。该工艺成本低,可同时去除废水中的有机质和无机盐,并加以利用,节能环保。

Introduces a comprehensive treatment technology of high concentration and high salt chemical wastewater,which includes the following steps :concentrating wastewater,adding organic flocculant,settling large particle impurity and most of suspended matter and floating substance;adding active carbon adsorbent,Adsorption of organic matter;filtration,removal of particulate impurities in the water,colloidal substances and suspended solids,and then through a nanofiltration separation of waste water in a divalent ion;containing a single ion water through reverse osmosis,the system can be made for industrial water Water,concentrated water by water dialysis for a concentration of salt to get Na Cl by-products;containing divalent ion water for frozen crystallization,centrifugal crystal layer after two-stage membrane electrodialysis,acid-base products,water layer And the saturated adsorbent which adsorbs the organic matter is dehydrated and dried for recycling.The process has low cost and can simultaneously remove the organic matter and inorganic salt in the waste water and make use of the energy and environmental protection.