Research on circulating water treatment technology in natural gas purification plant

Circulating water treatment is key technology for safe and smooth operation of natural gas purification plant circulating water system. The application effect of three kinds of water treatment technologies in natural gas purification plant were compared from field tests, the operation of cooling-heat transfer equipment, economic costs, safety and environmental protection. Experimental results showed that the water quality of circulating water from three branch factories are relatively stable, and the potential of scale or corrosion is not significant. From biofouling and scaling control in cooling-heat transfer equipment, industrial circulating water treatment technology provided by Kurita in Quxian branch factory was the best one, followed by electrolysis of water treatment technology (ECT) in Changshou branch factory, and copper-based catalyst was unsatisfied in Yinjin factory. In terms of cost control, the total cost of ECT is much lower than that of Kurita industrial circulating water treatment technology during service life of equipment. Considering safety and environmental protection, all chemicals used in Quxian branch Kurita industrial circulating water treatment technology are corrosive and toxic to aquatic organisms, posing security risks to the operating personnel adding chemicals or discharging sewage, increasing the yield of industrial wastewater and contaminating the environment. Comprehensive comparing the above three kinds of water treatment technologies, the lateral ECT is regarded as the optimal one in natural purification plant.