Causes and removal methods of scale formation in the condenser of the chiller

Causes and removal methods of scale formation in the condenser of the chiller

In industrial production, it is easy for the condenser pipes to form scale in the chillers used. If not treated in time, these scales will affect the heat exchange effect and cause the condensing temperature of the unit to increase, which in turn leads to a decrease in the cooling capacity and the unit Increase in power consumption. The editor of okmarts.com tells you that the main reason for the formation of scale is that the calcium and magnesium ions in the cooling water crystallize and condense in the form of salt when heated and condense on the inner wall of the copper pipe; the metal oxidation product of the system pipeline; the slime that bacteria and algae breed Wait.

　　 Therefore, the condenser of the chiller should be cleaned frequently. The removal time can be determined according to the water quality and the scale, but at least once a year. The method of removing scale is mainly divided into chemical cleaning and physical cleaning. The following okmarts.com editor will give you a detailed introduction to these two cleaning methods.

　　Chemical cleaning method: Mainly use cleaning liquid to clean, first clean with acid solution, then neutralize and clean with alkali solution, and finally rinse with water to rinse off acid and alkali solution.

　　1. The cleaning liquid can be added to the cooling water system in a certain proportion, and the cooling pump is turned on for 12-24 hours. The sediment layer is continuously dissolved and peeled off by the chemical action and scouring action of the cleaning liquid. However, this method requires a lot of cleaning potions and is costly.

　　2. A circulating pump and pipeline can be connected between the cleaning liquid storage tank and the condenser to form a closed loop, so that the cleaning liquid can be continuously circulated for 12-24 hours to dissolve and fall off the sediment.

　　3. Mix the cleaning liquid in a certain proportion, add it to the condenser and let it stand for 5-10 hours to soften and dissolve the sediment, drain the cleaning liquid, and rinse with clean water.

　　 The advantage of chemical cleaning is thorough descaling, reducing the workload of workers, but the disadvantage is that the cleaning fluid may cause corrosion to the condenser copper pipe, the waste liquid discharge problem after cleaning, and the price of the cleaning fluid is more expensive. okmarts.com reminds you to pay attention to the solution ratio, circulation and soaking time when performing chemical cleaning to prevent the condenser from being corroded.

　　Physical cleaning method: mainly use soft shaft brush to clean. The flexible shaft is driven by the motor of the washing machine to rotate. There is a nylon brush at the front of the flexible shaft. When in use, the flexible shaft and brush are extended into the copper tube of the condenser, and the brush is rotated at high speed to remove the inside of the copper tube. The dirt is finally rinsed with clean water. This kind of machine is called a gun machine.

The advantage of physical cleaning is that it saves the cost of chemical cleaning liquid, avoids the disposal of waste liquid after chemical cleaning, and is not easy to cause corrosion of the condenser copper pipe. The disadvantage is that the cleaning effect is not good for hard scale and corrosion products with strong adhesion. Good, and the cleaning operation is time-consuming and laborious.

　　 If the condenser has excessively hard scale, the editor of okmarts.com recommends a combination of chemical cleaning and physical cleaning. Firstly, soak the condenser with cleaning fluid, and then use physical cleaning method to remove the scale after the scale is softened.