At present, the open-loop cooling water treatment mainly by dosing method, that is, adding cooling water to the circulating dispersant, corrosion inhibitors, sterilization and algae in order to achieve the prevention of scaling, metal corrosion and microbial breeding purposes. This method has a certain effect, but a large amount of long-term dosage, resulting in environmental pollution and a waste, and sterilization after microbial dead bodies and slime clogging will increase. Pure dosing will inevitably lead to increase the concentration of circulating cooling water, is bound to increase the amount of sewage system and the amount of fresh water added. Dosing is only temporary shielding of the hazards of circulating water, but not a thorough treatment solution.
In recent years, a new process and concepts into a comprehensive introduction to the treatment of circulating cooling water, the use of circulating water next to the stream flow + softening + dosing process, in fact, this method in some foreign and domestic Petrochemical enterprises have already been applied, but not enough attention. Using this method, a fundamental solution to the system to improve the rate of enrichment of the problem, to remove suspended solids in the cooling water, hardness, to solve the problems of scaling and metal corrosion, and then through the dosing to prevent microbial growth, and microbial Of the body and sticky mud filter out. This method, to achieve the system zero emissions, that is, no sewage, thus saving a lot of water; the same time as the system water quality improvement, significantly reduce the dosage, which will have a significant economic benefits; heat exchanger replacement Less, system maintenance, maintenance is reduced, so the more important is the system to run more secure and economic.
If the cooling water system is not high hardness, you can use bypass flow + dosing process, so that both the system’s operating results, but also save investment. By-pass filtration system turbidity can be reduced to 20mg / l or less, so the system will be little or even zero emissions; also can reduce the dosage, saving drugs.