Repair method and steps of plate heat exchanger_
754 No matter what type of equipment is used for a long time, some problems will occur more or less, and brand plate heat exchangers are no exception. If the problem is not too big, users only need to master some simple maintenance methods. Troubleshoot as soon as possible and restore normal operation of the equipment. The following editor will tell you about the maintenance methods and steps of brand plate heat exchangers, so as to provide reference for users in need. Preparation before disassembly: The maintenance period of the plate heat exchanger is generally about 2 years. Before overhauling, check the heat exchanger as a whole, the aging degree of gaskets, the surface of the equipment, and the adhesive used, etc., and all bolts should be derusted and coated with anti-rust oil, and the entire equipment surface should be cleaned and inspected. Whether the equipment accessories are normal, and record its size for reference when reinstalling. The process of disassembly: When disassembling, wait for the various parameters of the equipment to meet the maintenance requirements and start disassembly. First remove the connecting pipe, and then loosen the bolts in the diagonal direction as when installing. During the disassembly, the width direction deviation of the pressure plate shall not exceed 10 mm, and the vertical direction shall not exceed 25 mm, so that the movable pressure plate is basically kept parallel. When removing the board, as long as the side of the board is offset by an angle of 10-20 degrees, it can be removed, and it must not be removed forcibly to avoid damage to the board. Replace the rubber pad and clean the plate: After disassembling the equipment, remove the old rubber pad first. Be careful when removing it. You can use a hair dryer to heat the bottom of the sealed groove to soften it, and then peel it off slowly. It is forbidden to use acetylene flame for heating. After the gasket is removed, there will be some residual glue, and the residual glue must be removed to keep the seal groove smooth. The cleaning of the plates generally uses manual or chemical cleaning. Steel balls or other sharp objects should not be used to prevent scratches on the plates. The scale on the plate can be cleaned with a soft brush in a special sink, but the water must not contain sulfur, alkali, chlorine and other ingredients to prevent corrosion. Check the defects of the plates: check the plates carefully to see if they are damaged. If found, replace them in time to avoid accidents during use. Plate assembly requirements: After the entire equipment is cleaned, when installing the plates, according to the process, place a side without rubber pads against the fixed pressure plate, and then separate the plates according to the interval. Tighten the long bolts when all are hung up. During the installation process, the balance of the movable pressing plate shall be maintained, and the length of the plate stack shall not exceed the deviation after the installation. Water pressure test: Perform a water pressure test after the installation is completed, first slowly increase the pressure to the design pressure and then maintain the pressure for about 30 minutes. During the period, there is no problem and it is qualified. After being qualified, it can be installed and used. The above is an introduction to the maintenance methods and steps of the brand plate heat exchanger, I hope it will be helpful to you! If you want to learn more about the maintenance of plate heat exchangers, please visit the official website of Diguang!