How to clean the cooling water tower of a walk-in constant temperature and humidity Box (1)

Cooling tower exposed for a long time, the adsorption force of the fan is very strong, so that a large number of sediment, dirt into the tower, long time operation will make the cooling tower slowly reduce the cooling capacity, water distribution outlet hole is easy to plug, sediment and dirt is also easy to enter the cooling water system, will directly affect the normal cooling water system. In order to prevent the above situation, the cooling tower should be cleaned regularly.

Cooling water tower cleaning treatment program flow

Scheme one: Stop the machine for cleaning

That is, according to the cleaning process of sterilization and algae cleaning - cleaning detergent cleaning - pre-film - cleaning after cleaning. This scheme needs to be cleaned in shutdown state for about 8 days, and the descaling rate is above 95%.

Cleaning procedure: water flushing - sterilization and algae cleaning - cleaning agent descaling cleaning - cleaning after washing - pre film - cleaning after cleaning.

1, water rinse

The purpose of water flushing is to use a large flow of water to wash away as much as possible the dust, silt, algae and corrosion loose dirt in the system, while checking the leakage situation of the system. The flow rate of flushing water should be greater than 0.15m/s, and the flushing water in the system should be exhausted after qualified flushing.

2, sterilization and algal cleaning

The purpose of sterilization and algal cleaning is to kill the microorganisms in the system, and make the equipment surface attached to the biological mud off. After the flushing water is drained, the system is cleaned by adding bactericidal algaecide. When the turbidity of the system tends to balance, the cleaning is stopped.

3, cleaning fluid descaling cleaning

The purpose of cleaning with cleaning liquid is to use cleaning agent to dissolve scale and oxide in the system and then dissolve in water to wash away. The cleaning agent will be added to the central air conditioning system with circulation pump circulation cleaning and at the highest point of emptying and the lowest point of blowdown, to avoid the production of gas resistance and shower blockage, affecting the cleaning effect. When cleaning, the concentration of cleaning solution, concentration of metal ions (Fe2+, Fe3+, Cu2+), temperature, PH value, etc., should be regularly detected. When the concentration of metal ions tends to be gentle, the cleaning will be finished.

4. Rinse after cleaning

The water washing is to wash away the residual cleaning liquid and impurities when cleaning, washing is to constantly open the shower to make the impurities deposited in the short pipe, residual liquid wash away. Flushing is to constantly test PH value, turbidity, when the PH value, turbidity tends to flatten out when the flushing ends.

5. Prefilm

The purpose of the pre-film is to make the metal surface in the activated state after cleaning or the protective film damaged metal surface to form a complete corrosion resistant protective film.

6. Clean up after cleaning

Cooler evaporator cleaning, after the end of cleaning should be the main engine cooler, evaporator open cooler with a special tube through the tube pull through flushing, because the water circulation system of the cooler exposed to the atmosphere and high heat exchange temperature, so the scale of the cooler will be more serious than other places, the cooler should be a separate external open circulation system cleaning and descaling, if necessary, Make sure every copper pipe in the cooler is unblocked. Flush the evaporator with high pressure water to thoroughly wash away the precipitated impurities in the evaporator. If necessary, clean the evaporator's separate external circulation system.

Cooling tower cleaning, because the cooling tower is exposed to the atmosphere, in the process of operation there will be a large number of sediment, algae attached to the surface of the cooling tower packing, not clean up in the future operation will be the dirt washed to the cooler caused by the heat exchange copper tube blockage in the cooler, affecting the heat exchange effect, so the cooling tower must be thoroughly cleaned.