Introduction to the method and steps of plate heat exchanger gasket replacement_
Introduction to the method and steps of plate heat exchanger gasket replacement
997 plate heat exchanger gasket replacement method and steps are introduced, the inspection and testing of reuse performance. In the case of suspected rust, check the wall thickness of the heat exchanger and pipeline; remove the aging plate heat exchanger seals, the plate heat exchanger gaskets are chemically cleaned with acid and alkali according to different dirt, and the cleaning is zero. The surface of the parts will not be corroded by the chemical medium; after the chemical cleaning, use a high-pressure blowing device to thoroughly remove the chemical medium remaining on the surface of the plate heat exchanger, and each heat exchanger plate is coated with a fluorescent test agent. Check for small cracks and corrosion holes under the irradiation of ultraviolet light, and clean it again. Also focus on checking the condition of the sealing groove, and trimming if necessary; Fifth, for the adhesive gasket, the residual material will be completely removed, re-bonded with a blended adhesive, and the recombined heat exchanger group Clamp in the clamp to solidify the adhesive, and heat and keep it in the holding furnace to achieve a good bonding effect. In the process industry equipment, the plate heat exchanger is a kind of equipment with high safety requirements. When the sealing gasket is damaged, the external leakage is visible. Heat exchangers, heat exchangers, etc. will have slight drips at the beginning. In process equipment with large pressure shocks, large leaks may occur due to the damage of the gasket. Under a strong pressure shock, the gasket can sometimes be removed from the correct installation position of the plate heat exchanger, or even out of the heat exchanger in severe cases. In this case, the equipment must be stopped immediately and the heat exchanger can be cooled to room temperature without pressure. If the gasket has been deformed under the action of the pressure shock, it can no longer return to its original shape and position, and a new gasket must be replaced. If there is no spare gasket, the heat sinks on both sides of the damaged gasket must be removed from the entire plate heat exchanger group, and then the gasket joint surfaces of the remaining heat sinks must be inspected. The remaining heat exchanger slices must be installed in strict accordance with the requirements in the instruction manual. In order to ensure that the remaining heat exchangers have enough stress to resist the load, the original allowable stress of each slice must be multiplied by the original number of heat exchanger slices. The obtained product is divided by the current number of remaining heat exchangers to obtain the current value of the assembly stress that each heat exchanger must withstand.