Study on emergency treatment of minor oil leakage of closed circulation cooling water system

Abstract

With the increasing shortage of water resources and the requirements of environmental protection, the closed circulation cooling water system will inevitably usher in a larger application space. However, when the leakage of the system, especially minor oil leakage, occurs, which is common and inevitable, the water quality of closed circulation cooling water will be deteriorated, and the cooling efficiency of the system will be affected due to the limited drainage and water refill. In view of such situations, this paper focuses on the slight oil leakage in the closed circulation cooling water system of Shaanxi Natural Gas General Plant, through the analysis of the water quality of the closed circulation cooling water system and the system basket filter intercepts in the case of slight oil leakage, with the experimental device of rotary hanging piece method and the inoculation of fresh intercepts to simulate the field conditions of slight oil leakage, the treatment effects of different treating agents are studied. The results show that: In the case of slight oil leakage in the closed circulation cooling water system, the corrosion of carbon steel and stainless steel increases and the corrosion of carbon steel is more serious than that of stainless steel. The metal material attached to the system is mainly corrosion products, and the bactericidal stripping agent SW-01 has almost no effect on the stripping effect of corrosion products, with excellent bactericidal effect. After 6 days of , 3.0g/L of the corrosion inhibition stripping agent HS-01 was added, the peeling effect of corrosion products was obvious, and the peeling effect of 0.3g/L biological dispersant was improved to a certain extent, but not particularly obvious. The peeling effect of the fixtures could be completed on the 9th day. This treatment method can make the corrosion rate of carbon steel and stainless steel fully meet the requirements of circulating cooling water under the condition of little drainage and large water refill, and the peeling effect of the fixtures is obvious. The effect can meet emergency handling requirements.