Problems and solutions in the daily operation of circulating water

During the operation of the circulating cooling water, the supplementary water continuously enters the cooling water system, some of which are evaporated during the circulation and the other part is concentrated in the cooling water and concentrated, and the following series of changes occur:

1. Reduction of carbon dioxide content

After the supplementary water enters the circulation system, it is in full contact with the atmosphere in the cooling tower, and the carbon dioxide is lost to the atmosphere, destroying the ion balance and causing the circulating water to scale.

2. Increase in hardness and alkalinity

The circulating cooling water is concentrated, and the hardness and alkalinity of the cooling water are increased, thereby increasing the tendency of water quality to scale.

3. Increase in PH value

During the aeration process, the carbon dioxide is lost to the atmosphere, causing the pH of the cooling water to gradually rise.

4. Increase in turbidity

The supplementary water is continuously concentrated during the circulation process, and is in contact with the industrial atmosphere in the cooling tower to inhale dust and form a suspended matter. About 4/5 of the suspended matter is deposited in the collecting tank, which can be taken away by the sewage, and 1/1 The suspended matter of 5 is left in the water to increase the turbidity of the water, and if it is deposited on the heat exchanger, the heat exchange effect is affected.

5. Increase in dissolved oxygen concentration

During the spraying and aeration of the circulating water in the cooling tower, the oxygen in the air will enter the water to form dissolved oxygen, thereby increasing the corrosion of the cooling water.

6, the increase in salt content

The make-up water is concentrated during continuous circulation, increasing the tendency of the circulating water to foul and the tendency to corrode.

7. Entry of harmful gases

In the atmosphere, sulfur dioxide, hydrogen sulfide and ammonia enter the water and increase corrosion of metals.

8, the entry of process leakage

The process medium leaks into the circulating water, which deteriorates the water quality and increases the tendency of the circulating water to scale, corrode or grow microorganisms.

9, the growth of microorganisms

The slime produced by the microorganisms covers the metal surface of the heat exchanger, which not only reduces the cooling effect of the heat exchanger, but also causes the corrosion under the scale and the microbial corrosion.

Pei Xin developed environmental SP-300 and SP -200 series corrosion inhibitors and fungicides, can effectively solve the cooling water circulating during routine operation on the generated scaling, corrosion and microbiological slime problems, if relevant Welcome to electrical problems or needs advice!

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