Water treatment technology of vehicle body welding process circulating cooling water system

Abstract

The invention discloses water treatment technology for a circulating cooling water system of vehicle body welding technology, which comprises: agent-feeding treatment of circulating cooling water; arrangement and maintenance of a bypass filter; pollution discharge in workshops; and control of the water quality of the circulating cooling water. The method comprehensively solves the problems of corrosion of pipelines, sedimentation and microorganism reproduction, blockage and damage of welding equipment and so on caused by various defects in the prior circulating water treatment, guarantees long-term stable operation of the system, and maintains the heat exchange efficiency of a heat exchanger, so as to prevent unintended shut-down and prolong the service life of the equipment.

Description

technical field [0001] The invention relates to a comprehensive treatment plan for circulating water, in particular to a water treatment process plan for process water used in automobile manufacturing. Background technique [0002] Body welding refers to a welding system that uses an electric current to fuse metal parts together. The welding equipment will accumulate huge heat during the welding process, and the cooling water flows through the welding equipment to achieve the purpose of cooling. [0003] From the perspective of water treatment, the characteristics of the welding process cooling water system and the shortcomings of the corresponding existing water treatment solutions are listed as follows: [0004] serial number features Inadequacies of existing water treatment solutions 1 Welding torch head water—the interface temperature of the heat exchanger is extremely high, and the welding torch head The parts reach above 1000℃ Corrosion inhibit...

AI Technical Summary

Problems solved by technology

[0004] serial number features Inadequacies of existing water treatment solutions 1 Welding torch head water—the interface temperature of the heat exchanger is extremely high, and the welding torch head The parts reach above 1000℃ Corrosion inhibitors have poor high temperature resistance and are prone to failure 2 The cooling water flowing through the welding equipment is energized, requiring cooling water Maintain low conductivity to prevent breakdown The conductivity of the corrosion inhibitor has a high contribution, which cannot meet the demand beg 3 The piping materials of the system equipment are extremely complex, including carbon steel, yellow Copper, copper, aluminum, zinc, stainless steel, etc., easy to produce widely Galvanic corrosion Corrosion inhibitors have a high contribution to conductivity and are easy to promote galvanic Corrosion, causing leakage and fracture of pipeline equipment 4 Because it contains a lot of amphoteric metals such as aluminum and zinc, the pH needs to be strictly controlled in the neutral range Lack of pH control means, or the drugs used Body contributes to alkalinity, raising pH 5 Copper equipment has a lot of parts and has a large contact area with water. High corrosion inhibition requirements for copper Despise the corrosion inhibition treatment of copper, copper and copper alloy corrosion Corrosion is fast, especially speeding up the costly water-soaked copper The stress fracture corrosion of the cable greatly increases the production cost 6 The water temperature is 26-30°C all year round, which is especially suitable for microbial reproduction single fungicide, causing microbial resistance, The bactericidal effect is not good; the corrosion inhibitor used contains NO 2 - Or a large amount of phosphorus, which promotes the reproduction of microorganisms

[0005] 7 The pipeline is complicated, the equipment is precise, and there are many narrow water flow channels. Easy to clog extract sinigrin

Therefore, the requirement for SS is high. The system is not equipped with bypass filter equipment, even if there is, Also neglected to maintain, so can not give full play to its filter effect 8 Each welding equipment is a part of the whole cooling water system At the terminal point, it is easy to form deposits and cause blockage Lack of a reasonable terminal sewage maintenance plan, long-term After a long time, due to poor water flow, it leads to false welding, and even to clog and burn out the torch