臭氧在中水回用于循环冷却水系统中的缓蚀性能

将臭氧应用在中水回用于工业循环冷却水系统的处理中,研究在不同臭氧投加量下模拟循环冷却水系统中的腐蚀情况,并对中水主要存在的COD、NH3-N较高问题加以研究。结果表明:当臭氧投加质量浓度为3.5mg/L时,臭氧缓蚀能力最佳,碳钢挂片腐蚀率最低为0.303 5 mm/a,缓蚀率为51.67%,臭氧与DJNP01共同作用时腐蚀率为0.189 3 mm/a,具有较好协同作用。CODCr和NH3-N的去除率分别为70.2%、65%,达到工业水补水水质要求。

Research on the corrosion inhibition performance of ozone applied to the reuse of reclaimed water for circulating cooling water systems

Applying ozone to the reuse of reclaimed water in circulating cooling water treatment systems ,the corro-sion situation in a simulated circulating cooling water system under different ozone dosage conditions has been in-vestigated,and the problems that COD and NH3-N in the reclaimed water are relatively high have been researched. The results show that the corrosion inhibition capability is the best,when ozone optimum dosage is 3.5 mg/L,the lowest carbon steel coupon corrosion rate is 0.3035 mm/a,and corrosion inhibition rate 51.67%. When ozone and DJNP01 work co-efficiently,the corrosion rate is 0.1893 mm/a,having relatively good synergistic effect. The remov-ing rates of CODCr and NH3-N are 70.2%and 65%,respectively,meeting the requirements for the water quality of industrial water make-up water.