Plate heat exchanger is an important part of heat exchange technology in process industry equipment. The plate heat exchanger gasket that seals between the plates of each heat exchanger is a vulnerable part, and it is also a part that is prone to aging under natural conditions. Its service life has an important influence on the service life of the plate heat exchanger. If these gaskets are thermally hardened and lose their original elasticity, the heat exchanger may not work properly.
The general procedure of plate heat exchanger sealing gasket replacement. (1) Check the wall thickness of the heat exchanger and pipes when rust is suspected, and remove the aging seals. (2) According to different dirt, use acid-alkali cleaning tank for chemical cleaning. The surface of the cleaned parts will not be corroded by chemical media (such as gasoline). (3) After chemical cleaning, use a high-pressure blowing device to thoroughly remove the chemical medium remaining on the surface of the plate heat exchanger. (4) Each heat exchanger plate is coated with a fluorescent test agent, under the irradiation of ultraviolet light, check whether there are small cracks and corrosion holes, and clean it again. (5) Check the sealing groove of the plate and trim if necessary. Adhesive gaskets should be thoroughly cleaned of residual materials, re-bonded with a blended adhesive, and the re-assembled heat exchanger sheet set is clamped in a special fixture to cure the adhesive. The non-adhesive gasket uses different devices to fix the gasket in the heat sink.