Why should we Clean the Central Air Conditioning Water Treatment System?

Central air-conditioning water is recycled repeatedly in the circulation system. Due to the increase in water temperature and evaporation, the soluble substances in the water are continuously concentrated. The water collection pool of the cooling tower is exposed to wind, sun, rain and various external environmental factors. Pollution will cause sediment adhesion, equipment corrosion and a large number of microorganisms that are more serious than once-through cooling water and closed cooling water systems. This will cause mud and dirt to block the pipelines, leading to scaling and corrosion tendencies in the cooling system. increase, causing hidden dangers to production safety.

Therefore, it is necessary to discharge water that has been in operation for a long time, add some fresh water and water treatment chemicals, maintain water balance and stable water quality, ensure long-term safe and energy-saving operation of equipment, and effectively control corrosion, scaling, and biological slime hazards in the water system. Carry out central air conditioning water treatment.

Physical cleaning:

Physical cleaning mainly uses the scouring effect of water flow or the brushing, wiping and scraping effect of instruments to remove sediments in equipment and pipelines. The main methods of physical cleaning are: high-pressure water cleaning and appliance cleaning.

① High-pressure water cleaning: High-pressure water cleaning is a method that uses powerful jets of high-speed water to act on the surface to be cleaned at a certain angle. It is usually used for internal and external cleaning of heat exchanger tube bundles and cooling tower packing cleaning.

② Instrument cleaning: Use cleaning tools such as brushes or blasters to clean system pipelines. Usually used for cleaning the heat exchange tubes of heat exchangers.

Chemical cleaning:

Chemical cleaning method is a cleaning method that uses the chemical action of chemicals to dissolve, loosen, fall off or peel off the sediments in the equipment and pipelines being cleaned. Generally speaking, chemical cleaning methods can not only remove dirt in the system, but also remove various scales, metal corrosion and biological slime.

The main steps and methods are as follows:

①Sterilization and algae removal: By adding a cleaning agent that has a good sterilization effect and can strip microorganisms from the pipeline into the circulation system, various bacteria and algae in the circulating water are removed, and at the same time, the biological slime in the pipeline is peeled off, and the slime is removed through circulation. Clean out the mud.

② Pickling: The purpose of removing scale is achieved through a chemical reaction between weak acid and scale in the system.

③ Neutralization: After pickling, add water to the system, and at the same time discharge the pickling waste liquid from the sewage outlet. You can also add a small amount of sodium carbonate to neutralize the residual acid, so that the pH value of the water becomes 7.0.

④ Pre-filming: Add pre-filming agent to form a dense polymeric polymer protective film on the metal surface to prevent corrosion.