Analysis and research on the operation of circulating cooling water in automobile welding workshop

Abstract

Closed circulating water system is used in automobile welding workshop to cool the main equipment such as welding equipment. The process flow and problems of the closed circulating water system were researched and analyzed. In response to the problems, three measures such as improving the circulating water quality, setting up exhaust valves in the main pipes, exchanging the air control valves for the independently design and optimize ones and regularly inspecting them were implemented. The results showed that the adopted measures effectively reduced the amount of suspended solids in circulating water from the highest 720 g in a quarter to 32 g, reduced the influence of air-water mixture and the circulating water discharged to remove suspended solids and air, which led to reduce the average daily water recharge from the highest 15.8 t to the lowest 0.5 t, on more than 2 t, reduced the equipment damage rate caused by the circulating water system, ensured the equipment start-up rate with the cumulative shutdown time reducing from 2 514 min in 2019 to 73 min in 2022.

Keywords

• automobile welding workshop
• closed circulating water system
• air control valve
• air-water mixture