How to clean the evaporator

The circulating cooling water of the evaporator contains a large amount of salts, corrosion products and various microorganisms. Due to the lack of water treatment, a large amount of calcium and magnesium carbonate scale, algae and microorganisms will form on the water side of the evaporator after a period of operation. Sludge, sticky mud, etc., these dirt are firmly attached to the inner surface of the copper tube, which leads to the deterioration of heat transfer, the increase of circulating pressure, and the reduction of the vacuum degree of the unit, which affects the operation efficiency of the unit and causes great economic losses.

Disconnect other systems not related to the evaporator before cleaning the evaporator. Open the high-point vent valve on the water side of the evaporator and the low-point guide valve on the steam side to ensure that a large amount of gas generated during the cleaning process can be discharged in time and the fullness of the cleaning solution; at the same time, the guide valve is used to monitor the heat exchanger during the cleaning process. Leakage of copper pipes.

The traditional cleaning method usually adopts chemical cleaning-pickling, which is effective for various depositions and saves time compared to mechanical methods. However, chemical cleaning is corrosive to systems and other metal components, prone to corrosion of equipment pipelines, and pollutes the environment when discharged.