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What problems will be encountered when the plate heat exchanger is repaired_

by:DIGUANG     2021-04-11
What problems will be encountered in the maintenance of plate heat exchangers

2019-07-05 16:17
In the process of repairing plate heat exchangers, maintenance personnel sometimes encounter some difficulties due to the interference of various uncertain factors. If they are not handled in time, they will inevitably affect the maintenance progress of the equipment, It may also cause secondary damage to the plate heat exchanger. What are the main problems encountered in the maintenance of plate heat exchangers? Let’s take a look! Due to the convenient disassembly and assembly of the plate heat exchanger and simple maintenance, special tools and equipment are generally not required. Different methods can be used according to different situations. If the equipment does not leak, but the heat transfer system K has dropped, you can use a closed circuit system to pump the descaling liquid into the equipment and circulate for several hours without disassembling the heat exchanger. That's it. If there is no such condition on site, and if the scale is found to be not too serious after disassembling the equipment, you can rinse directly with water without removing the plates, and scrub with a soft brush at the same time. For the normal operation and maintenance of the plate heat exchanger, the equipment that needs to be repaired should be disassembled in the reverse order of installation. Equipment used in the petroleum and chemical industries should be regularly maintained according to the maintenance cycle. If the medium in the equipment is flammable, explosive or corrosive, it should be repaired at least once a year. Plate heat exchangers used in other industries should be inspected and repaired once every three years if there is no leakage. The plate heat exchanger flow channel refers to the medium flow channel formed by two adjacent plates in the plate heat exchanger. Generally, several flow channels are connected in parallel or in series to form different combinations of cold and hot medium channels. The process combination form should be calculated based on heat exchange and fluid resistance, and determined under the requirements of process conditions. Try to make the convective heat transfer coefficients in the cold and hot water channels equal or close to each other to get a better heat transfer effect. Because the convective heat transfer coefficient on both sides of the heat transfer surface is equal or close to the heat transfer coefficient to obtain a larger value. Although the flow velocity between the plates of the plate heat exchanger is not equal, the average flow velocity is still used in the calculation of heat exchange and fluid resistance. Because the U-shaped single-flow pipes are fixed on the pressing plate, it is convenient to disassemble and assemble. Therefore, when we find the above problems in the process of repairing the plate heat exchanger, we must take corresponding measures to solve them, so as to ensure the smooth completion of the repair work of the plate heat exchanger. If you want to know more about the repair method steps of plate heat exchanger, please go to the official website of Diguang for more reading!
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