What should I pay attention to when cleaning and replacing the gasket of the plate heat exchanger? _
What should I pay attention to when cleaning and replacing the gasket of the plate heat exchanger?
467 plate heat exchanger gasket, as the core component of the heat exchanger, has a great impact on its operation and use. After long-term use of the gasket, dirt and impurities will inevitably appear on the surface. If not in time Cleaning and replacement will directly affect the efficiency and effectiveness of the equipment, and even cause damage to the equipment. So what should we pay attention to when cleaning and replacing the gasket of the plate heat exchanger? 1. Cleaning the plate heat exchanger should be overhauled according to a predetermined period. If the heat exchange efficiency is significantly reduced and the pressure drop changes significantly, it should be cleaned. When the cleaning workload is small, it can be carried out one by one while the plates are suspended. If the scaling is serious, remove the plate and lay it flat for cleaning. If a chemical cleaning agent is used, it can be circulated in the equipment. If it is mechanically cleaned, the equipment needs to be opened. To clean the plates, use a soft brush or titanium plates. It is forbidden to use steel brushes to avoid scratching the plates. After rinsing with clean water, dry it with a cloth. No foreign particles or fibers are allowed on the board. After cleaning, check the plates and gaskets carefully, and deal with any problems in time. Plate inspection method: coloring method: inspect with coloring agent. (Four steps of penetration, cleaning, imaging and inspection) Transparency method: place the light source on one side and check on the other side. One-sided pressure test method: One-sided water pressure test to 0.35MPa (gauge pressure), if there is water in the lower part of the other side, quickly disassemble and check the wetness of the sheet. Note: The chloride ion content of the cleaning water is not more than 25ppm. 2. To replace the gasket, the plate of the gasket needs to be replaced. Place it flat on a horizontal surface, pry the gasket with a screwdriver, and gently remove it (or lightly bake it on the back of the plate with fire. But to avoid discoloration of the metal) and then tear it off. There are also liquid nitrogen rapid cooling methods. Use acetone methyl liquid or other ketone organic solvents to clean the sealed tank. Recommended adhesive: J03A 401 403 glue. It is recommended that the rubber pad be heated at 70～80℃ (or not heated). Apply a layer of adhesive evenly on the bottom of the sealing groove (not too much), gently pull the heated gasket to remove the stolen goods of the gasket, and place it in the sealing groove, fit evenly, and lay it horizontally and flatly. Press appropriate heavy objects, try to prevent dry and ventilated places, and let them dry for 2-6 hours. Check one by one to see if the fit is even, and remove excess adhesive. Reinstall it on the frame and press it to the required L size. Follow the start-up procedure. Grease the clamping bolts, and put on a protective tube when possible to avoid rust and damage to the threads. The above are some of the issues that need to be paid attention to when cleaning and replacing the gasket of the plate heat exchanger. I hope it will be helpful to you. If you want to know more about the price, brand and model of plate heat exchanger gaskets, please go to the official website of Diguang Heat Transfer to learn more.