Shandong Zhilin Environmental Protection Technology Co., Ltd.

Disassembled plate heat exchanger cleaning and maintenance methods

Release time:

2022-10-10 15:18

Source:

Cleaning and Maintenance of Detachable Plate Heat Exchangers Regular inspections should be carried out on detachable plate heat exchangers. Because plate heat exchangers are easy to disassemble and maintain, and generally do not require special tools or equipment. Different methods can be selected according to different situations. If the equipment does not leak, and only the heat transfer system is reduced, and the heat transfer effect is poor, the heat exchanger does not need to be disassembled, so a closed-circuit television can be used to circulate the automatic descaling cleaning solution in the facility for several hours. If this standard is not available on site, and the disassembly of the equipment and the discovery of scaling are not serious, the plates do not need to be removed, and tap water can be used directly.

　　Cleaning and maintenance methods for dismountable plate heat exchangers

　　Regular maintenance should be carried out on dismountable plate heat exchangers. Because plate heat exchangers are easy to disassemble and repair, and generally do not require special tools or equipment. Different methods can be chosen for different situations. If the equipment does not leak, but only the heat transfer system is reduced, and the heat transfer effect is poor, then the heat exchanger does not need to be disassembled, so a closed-circuit television can be used to circulate the automatic descaling solution in the facility for several hours. If this standard is not available on site, and if the equipment is not disassembled and the fouling is not serious, the plates do not need to be removed, and the cleaning can be done directly with tap water and a soft brush.

Dismountable plate heat exchanger

　　I. Normal operation inspection

　　1. When repairing equipment, the heat exchanger should be disassembled in reverse order of assembly.

　　2. Machines used in the petroleum and chemical industries should be inspected regularly according to the maintenance cycle.

　　3. If the substances in the equipment are flammable, explosive, or highly corrosive, they should be inspected at least once a year.

　　4. For dismountable plate heat exchangers commonly used in other industries, if there is no leakage, inspection can be carried out every three years at least.

　　II. Plate cleaning and protection

　　Maintaining plate cleanliness is one of the main conditions for maintaining high thermal conductivity. Between the plates, the substance moves along narrow and tortuous flow channels. Even a not very thick fouling layer will cause a change in the flow profile, significantly affecting the fluid flow, increasing the loss, and reducing the thermal conductivity. For example, a sugar factory used a plate heat exchanger in heating, and because the secondary water was not well treated, the flow channels were blocked in only two months of use, making it impossible to continue operation.

　　1. Chemical water treatment method

　　This method involves circulating a chemical solution through the heat exchanger to dissolve and remove the fouling on the plate surface. This method does not require disassembly of the heat exchanger, optimizing the cleaning process and reducing the workload. Because the corrugated plates promote strong penetration of the cleaning solution, which is beneficial to the dissolution of the fouling layer, the chemical water treatment method is still a relatively ideal method.

　　2. Mechanical (physical) cleaning method

　　This method involves manually brushing the plates with a cloth to remove fouling from the plate surface. Although this method is direct, it is not easy to clean hard and thick fouling layers.

　　3. Comprehensive cleaning method

　　For fouling layers that are very hard and thick, it is difficult to clean them thoroughly using only one of the above methods. The analytical method first uses a chemical water treatment method to dissolve the fouling layer, and then uses a mechanical (physical) cleaning method to remove the fouling layer to keep the plates clean.

Design advantages and ventilation methods of a detachable plate heat exchanger

Advantages of plate heat exchangers