The chemical cleaning of Evaporator Coil is mainly to restore its heat exchange capacity. When the heat exchange performance of the heat exchanger is attenuated, you should be aware of the heat transfer resistance that may be caused by fouling. At this time, open the heat exchanger connecting flange and visually inspect it. If it is confirmed that it is due to dirt, it is necessary to chemically clean the inner wall of the air heat exchanger.
The evaporator coil is an important equipment for the air to exchange heat and cold. Pass in hot and cold media to cool or heat the air. High temperature water, steam, and heat transfer oil can be used to heat the air. With cooling water, chilled water can cool or condense air. Therefore, evaporator coils are widely used in various industries such as textiles, machinery, electronics, painting, medicine, and food. Where air temperature needs to be adjusted and air cold and heat exchange is required, an air heat exchanger is generally required.
First of all, we should understand the evaporator coil. It is a heat exchange device that heats or cools air through a heat exchange medium. If low-temperature water is introduced, the air can be cooled; if high-temperature heat sources such as steam, high-temperature water or heat transfer oil are introduced, the air can be heated. Therefore, it is widely used in light industry, construction, machinery, textile, printing and dyeing, electronics, food, metallurgical coating and other industries. It can be used for hot air heating, cooling, condensation, dehumidification, and drying operations.
After long-term use of the evaporator coil, due to various factors such as precipitation, chemical reaction, etc., the evaporator coil will produce dirt. It is necessary to use chemical cleaning to clean the dirt in the tube and restore the heat transfer effect of the evaporator coil.
The cleaning steps of the evaporator coil are as follows:
1. Isolate the equipment system, and then drain the accumulated water in the heat exchanger.
2. The closed system uses high-pressure water to clean the pipeline.
3. Ball valves must be installed on the isolation valve and the exchanger, and then connected to the delivery pump and connecting pipe, so that the cleaning agent can enter from the bottom of the heat exchanger and flow out from the top.
4. Carry out repeated cycle cleaning with cleaning agent. During this process, gas will be generated. At this time, the bleed valve should be opened to discharge the excess gas so as to leave more space. At this time, you can add an appropriate amount of water, but not too much to prevent overflow.
If you want to know more, please contact us: Hot Water Coils.