Chemical water treatment scheme of circulating cooling water

The manufacturer of high-voltage electrostatic circulating water will explain to you that the chemical water treatment of circulating cooling water is to solve or alleviate the three problems of sediment adhesion, metal equipment corrosion and microbial breeding by adding various chemical water treatment agents in the water. The complete technical process should be to select corrosion inhibitor and scale inhibitor according to the water quality, equipment material and working conditions of the circulating water system The main content of the cooling water treatment technology is to make up the water treatment formula by correctly matching dispersant and biocide, proposing the process control conditions, providing the corresponding cleaning and pre filming schemes, etc., among which, the main content of cooling water treatment technology is to make up the formulation of corrosion inhibitor, scale inhibitor and dispersant, determine the appropriate process control conditions, guide the start-up and provide technical services.

The sediments in the circulating water system are mainly scale and dirt (sludge, corrosion products and biological sediments). Various salts dissolved in natural water precipitate from the water due to heating and other reasons. We call them scale, such as carbonate, sulfate, phosphate, chloride, silicate, etc., and calcium salt is the most common. When scale inhibitors are used in chemical water treatment, the effects of different chemicals on different scales are quite different; and different water sources (rivers and lakes water, groundwater, municipal water supply, etc.), the water quality will also vary greatly (the same water source, different seasons, water quality will also have differences). Therefore, it is necessary to determine the main components of salt in water, that is, the main scaling substances, through comprehensive analysis Then select the appropriate scale inhibitor.

The corrosion of metal in water is mainly electrochemical corrosion with oxygen, and the chemical water treatment method is to add corrosion inhibitor (in the form of passive film, precipitation film and adsorption film) to cover the metal surface to slow down the corrosion. Therefore, we must first understand the type of metal in the system, combined with water quality conditions and operating parameters, select corrosion inhibitor, and determine the treatment scheme.

Bacteria, fungi and algae, such as iron bacteria, sulfate reducing bacteria, nitrifying bacteria and thiobacilli, can cause failures in cooling water. Some of them will directly corrode various metals or nonmetals, and some will adhere to other impurities and deposit, causing great harm. It is necessary to determine the species and quantity of the main microorganisms in the system, select the targeted bactericide and algicide according to the water quality and operation conditions, and formulate an effective implementation scheme of sterilization and algae killing.