These points must not be ignored in the maintenance of plate heat exchangers! _
Compared with ordinary plate heat exchangers, 911 should pay attention to some problems in the maintenance of brand plate heat exchangers, so as to avoid maintenance errors and affect the normal use of heat exchangers. When repairing the brand plate heat exchanger, the maintenance personnel must not ignore the following special precautions. 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 equipment that needs to be repaired for normal operation and maintenance of plate heat exchangers, the heat exchangers 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. Precautions for the maintenance of plate heat exchanger ① Replace the cracked or perforated plate, and use the light transmission method to find the plate crack on the spot. ②Adjust the operating parameters to reach the design conditions. ③The clamping size should meet the requirements when repairing and assembling the heat exchanger, not as small as possible. ④The plate data of the plate heat exchanger are reasonably matched. 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. As a professional brand plate heat exchanger repair manufacturer, Diguang Heat Transfer Technology Co., Ltd. can provide you with a complete repair plan and professional repair advice, and strive to solve your troubles!