Correct Cleaning Method and Steps for Chiller Condenser
Today a customer asked me why he set the outlet temp lower（20Degrees to 17Degrees）, there is high pressure alarming, how to set?Our eng asked him whether he cleaned the condenser these 3year since he use, he said no.So here we see how to clean the chiller condenser?
Condenser cleaning is divided into physical cleaning and chemical cleaning. The physical cleaning generally uses high-pressure water jets to remove the dirt on the condenser copper pipe; if the scale is hard scale, it should be chemically cleaned. The physical method cannot remove the scale. In order to make the condenser operate in the optimal state, it is necessary to carry out special chemical treatment on the condenser, and the correct steps are as follows.
Method/Step
1. Close the valve of the cooling water in and out of the condenser tightly, and use the thermometer tube, pressure gauge tube or sewage pipe to connect the anticorrosive pump and the liquid distribution tank to make a small circulation system for circulating cleaning.
2. Add pickling corrosion inhibitor first. This agent is a special copper corrosion inhibitor, which is attached to the metal inner wall of the condenser to prevent acid and metal from reacting.
3. Then add solid pickling cleaning agent, used to clean the calcium carbonate scale as the main component of the scale. The cleaning agent is a composite solid organic acid, white crystals, non-corrosive to metals, and a weak acid. Depends on the amount.
4. Add mud scale stripper (optional). If the condenser equipment is thicker, you need to add mud scale stripper to promote the product after the scale reaction to quickly dissolve in water and accelerate the deep scale reaction.
5. Add a neutralizing passivator, and after the condenser is chemically cleaned, it will neutralize the residual acid to prevent the oxidation of the metal surface and the formation of secondary floating rust.
In short, the condenser of the chiller is very easy to scale. Normally, daily water treatment should be done during the cooling period in summer. Otherwise, the inorganic salt dissolved in the water in the circulating water system will rise with the temperature when running in a high-hardness water environment. High crystal precipitation and scale formation on the tube wall of the condenser heat exchange surface will reduce the heat exchange efficiency, so it must be cleaned in time.
