Chiller Condenser and Evaporator Tube Chemical Cleaning

Basic Chillers are providing descaling of condenser tube, shell, and tube (evaporator) to make the chiller work efficiently and to maintain the chiller.

Many refrigeration units adpot water-cooled cooling system. The inner wall of the water-cooled condenser is easy to scale. These scales will affect the heat exchange effect, resulting in an increase the condensing temperature, which will badly lower cooling capacity and increased unit power consumption. Water-cooled condensers should be regularly descaled, at least once every six months depends on local water quality and scaling. There are many ways to descale. We will introduce two methods according to the condenser of the water-cooled compression condensing unit: chemical cleaning and physical cleaning

First, check the scaling & chemical cleaning method

Condenser scaling usually has the following performances:
1. The cleaning liquid can be added to the cooling water system in a certain proportion, and the cooling pump is turned on for 12 to 24 hours. The cleaning liquid is continuously circulated, and the sediment layer is continuously dissolved and detached by the chemical effect and the scouring effect of the cleaning liquid. However, this method requires a large amount of cleaning solution and is costly.

2. Cleaning a single condenser, a circulation pump and a pipe can be connected between the cleaning liquid storage tank and the condenser to form a closed circuit, so that the cleaning liquid is continuously circulated for 12 to 24 hours to dissolve and fall off the sediment.

Use immersion. The cleaning solution is exchanged according to a certain ratio, and is placed in a condenser for standing for 5 to 10 hours to soften and dissolve the scale, drain the cleaning liquid, and wash with water. When you can't see the original color of the copper tube, and the scaling is already very serious. It needs to be cleaned in time.

The main reason for the scaling is that calcium and magnesium ions in the cooling water crystallize out as salt in the form of salt and condense on the inner wall of the copper tube ; the metal oxidation product of the system pipeline; the slime produced by the bacteria algae, and so on.

Secondly, the physical cleaning method

The physical cleaning method is to use a soft shaft brush to clean. The soft shaft is driven by the motor of the cleaning machine. There is a nylon brush at the forefront of the flexible shaft. When using, the soft shaft and the brush are inserted into the copper tube of the condenser, and the scale in the copper tube is removed by high-speed rotation brush. The dirt is finally rinsed with water.

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