Issue 21/2013 - Sodium hypochlorite waste liquid becomes treasure

Sodium hypochlorite waste liquid becomes treasure

The production process of PVC resin requires the use of sodium hypochlorite as a detergent to remove impurities such as sulfur and phosphorus in calcium carbide, but the waste liquid generated has always been a headache for many chlor-alkali companies
.
Direct discharge will bring great problems of sewage discharge and environmental pollution, and the process technology of recycling waste sodium hypochlorite is high, difficult and difficult to master.

With the good basic conditions of the new park, through scientific design and fine control, Dezhou Shihua Co.
, Ltd.
has recently achieved full recycling of waste sodium hypochlorite, and the annual income generated by this is as high as more than
3 million yuan.

Dezhou Shihua first recovers acetylene gas contained in waste sodium hypochlorite through the stripping exhaust gas recovery device, which can greatly reduce the calcium carbide consumption of PVC resin products, according to the annual production of 300,000 tons of PVC, it can reduce calcium carbide consumption by more than 900 tons per year, with a value of more than 3 million yuan; Secondly, they compound waste sodium hypochlorite to increase its concentration and achieve reuse, which can save 500,000 cubic meters of industrial water per year while reducing waste liquid discharge, and save hundreds of thousands of yuan in water withdrawal fees and sewage treatment fees
for enterprises.
(Peak)