Heat exchangers are important equipment that are indispensable in many industrial productions and are widely used in chemical, pharmaceutical, food processing and other fields. However, as time goes by, scaling in the heat exchanger will seriously affect its heat exchange efficiency and even cause equipment failure. Therefore, regular cleaning of the heat exchanger is an important measure to maintain equipment performance and extend its service life. This article will introduce an efficient heat exchanger scaling cleaning method to help you easily solve this problem.
Before cleaning the heat exchanger, we must first understand the causes and hazards of heat exchanger scaling. During the use of the heat exchanger, impurities, minerals and chemical components in the fluid will be deposited on the heat exchange surface to form a scale layer. These scale layers have the following effects on the heat exchanger:
1. Reduce heat transfer efficiency: scaling increases the heat transfer path, resulting in increased energy consumption and decreased heat exchange efficiency.
2. Increase pressure loss: The scale layer will hinder the flow of the fluid and increase the pressure loss of the system.
3. Shorten the service life of the equipment: Continuous high temperature, high pressure and corrosive environment will accelerate the aging and damage of the heat exchanger.
High-pressure water cleaning is an efficient, economical and environmentally friendly method for cleaning heat exchangers, which is suitable for many types of heat exchangers. And only manual hand-held spray guns are needed for cleaning, which is simple to operate, efficient and environmentally friendly. High-pressure water flow can effectively impact and peel off the scale layer in the heat exchanger, especially stubborn scale and dirt. Compared with chemical cleaning methods, high-pressure water cleaning does not use chemical cleaning agents, avoiding corrosion and pollution of equipment.
Before high-pressure water cleaning of the heat exchanger, it is necessary to ensure that the heat exchanger is in a shutdown state to avoid accidents during the cleaning process. Let the heat exchanger cool completely to prevent safety hazards caused by high temperature. Close the inlet and outlet valves to ensure that there will be no water leakage during the cleaning process. If the shell and tube heat exchanger is being cleaned, the shell and tube bundle need to be disassembled for easy cleaning.
Using a high-pressure cleaner to clean the heat exchanger, the water pressure of 50-150MPa can generally meet the requirements of dredging and cleaning. When the scale is not too tight, the pressure can be selected to be around 70MPa. When the structure is hard and tight, if there is a serious blockage problem, a higher pressure range of 100-150Mpa can be selected.
During cleaning, the high-pressure water gun is manually held and the high-pressure water jet is sprayed from the nozzle. During cleaning, the high-pressure water jet is evenly sprayed on each heat exchange surface that needs to be cleaned. During cleaning, the cleaning pressure can be adjusted according to the actual scaling situation until the blockage and scaling problems of the heat exchange equipment are completely solved. For the cleaning of shell and tube heat exchangers, the high-alloy nozzle can be inserted into the tube for high-pressure water cleaning, and the scale layer in the heat exchanger tube bundle can be flushed out by the huge impact force of the high-pressure water jet until the flushed water is clean.
After confirming that the heat exchanger has been cleaned and not damaged, reassemble the components in the order of disassembly. Reconnect the inlet and outlet pipes, open the valve, test the equipment operation, and ensure the normal operation of the heat exchanger.
It can be seen that when using a high-pressure cleaner to clean the heat exchanger, you only need to choose a high-pressure cleaner with a suitable pressure to easily solve the scaling problem of the heat exchanger, ensure the normal operation of the equipment and extend its service life. Regular cleaning and maintenance will help improve the heat exchange efficiency of the heat exchanger, reduce energy consumption and improve production efficiency.
