Sodium hypochlorite waste liquid becomes treasure

In the production of PVC resin, sodium hypochlorite is used as a detergent to remove impurities such as *, phosphorus, etc. from the calcium carbide, but the resulting waste liquid has always been a headache for many chlor-alkali enterprises. Direct discharge will bring a lot of sewage discharge and environmental pollution problems. The process technology for recycling waste sodium hypochlorite has high requirements, is difficult, and difficult to grasp. Based on the good foundation conditions of the new park, Texas Real Estate Co., Ltd., through scientific design, fine management and control, has enabled the entire waste sodium hypochlorite to be recycled and used, resulting in an annual income of more than 3 million yuan.

Texas Shihua first recovered the acetylene gas contained in the waste sodium hypochlorite through a stripping exhaust gas recovery device. This action can significantly reduce the consumption of calcium carbide in the production of PVC resin products. According to the annual production of 300,000 tons of PVC production, it can reduce the consumption of calcium carbide by more than 900 annually. Tons, valued at more than 3 million yuan; secondly, by reusing the waste sodium hypochlorite to increase its concentration and achieve reuse, it can save 500,000 cubic meters of industrial water annually while reducing waste liquid emissions. The company saves hundreds of thousands of yuan in water and sewage treatment fees.

Up to now, the company’s waste sodium hypochlorite recycling rate has basically reached 100%.