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Large air separation unit circulating water system scheme selection

Large air separation unit circulating water system scheme selection
Apr 01, 2022
Author: DEAR AST

The water quality of the cooling circulating water system is related to the safe operation of the large air separation unit.

During the operation of the system, there are three major hazards commonly found in large air separation unit: scale, corrosion and biological slime, such as equipment scaling: corrosion perforation of water pipelines, scale and slime deposited on the packing that makes cooling towers work less efficiently. These hazards increase electricity consumption and also increase the workload of maintenance workers, reducing the efficiency of air separation equipment and shortening the service life of air separation equipment. Especially in the summer when the cooling load is high, the cooling system works in a very poor state, which can easily cause passive shutdown of large air separation unit, thus affecting production. Therefore, to ensure the safe, stable and economical operation of water treatment and cooling systems is an important task for large air separation unit managers.

Chemical treatment is now commonly used to address the three main hazards of cooling systems. Chemical water treatment technology is the development of a set of drug delivery program according to the circulating cooling water process parameters, operating conditions, water quality of the make-up water, large air separation unit materials and other circumstances, that is, the regular dumping of water treatment of special chemicals, and send a person to regularly take samples of laboratory tests, the whole control of concentration methods. The most direct advantage of this technology is the high input-output ratio, the annual fuel cost savings of this method is much higher than the cost of chemical water treatment, in addition, other comprehensive benefits are more significant, such as reducing the workload of maintenance workers, reduce maintenance costs, and extend the service life of large air separation unit.

The large air separation unit, small air separation unit and liquid air separation plant operation and maintenance system developed by Dear Air Separation can automatically analyse the data on site.

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