The aging treatment method and precautions of the gasket of plate heat exchanger_
The softening of the elastic gasket of the 435 plate heat exchanger is related to pressure and temperature. When the gasket loses its elasticity, the plate heat exchanger will leak. In some products, in order to solve the dripping phenomenon caused by the aging of the sealing gasket, it is allowed to adjust the sealing performance of the heat exchanger, that is, tighten the bolts of the combined plate heat exchanger again to adjust the elastic sealing gasket between each heat exchanger The pressing force solves the problem of dripping and leakage. In addition, when we find that the plate heat exchanger gasket is aging, what treatment methods can be taken? What issues should be paid attention to? On the nameplate of the plate heat exchanger with this function, the allowable large and small stresses are generally given. For new plate heat exchanger fins, small allowable stress should be used for connection and fixation. Depending on the number of plates in each group of plate heat exchangers, the tightening force of the plate heat exchanger can be adjusted one or more times. When tightening, the nut can be screwed in by 3mm, and always pay attention to the stress of the adjusting plate during the tightening process And, it is only allowed to adjust the tightening force at room temperature for heat exchangers without working pressure to prevent dripping. For plate heat exchangers that do not give the stress adjustment range on the nameplate, the stress value is generally given in the parts drawing. When tightening this type of plate heat exchanger, the tightening torque should not be lower than the value specified in the drawing in any case. Because it is related to the assembly quality and assembly deformation of the plate heat exchanger. When the tightening torque reaches the required value, the elastic gasket can be replaced in a planned way. For plate heat exchangers used in important production equipment and corrosive media, it is recommended to have a set of spare seals. When the warehouse temperature is 18℃, the seals of the plate heat exchanger can be stored for about 3 years in the transparent plastic packaging. It is not a simple matter to replace the gasket of the plate heat exchanger. If the operation method is not appropriate, problems such as equipment leakage and liquid leakage will occur. Therefore, we should pay attention to the following issues when replacing the gasket of the plate heat exchanger : Each heat exchanger plate is coated with fluorescent test agent. Check for small cracks and corrosion holes under the irradiation of ultraviolet light, and clean it again. In addition, check the condition of the seal groove and repair it if necessary. The bonding position and bonding quality of each plate type heat sink are inspected, and the classification is carried out according to the installation order; then the plate type heat sink group is carefully assembled. After the plate heat exchanger is chemically cleaned, a high-pressure blowing device is used to remove the chemical medium remaining on the surface of the plate heat exchanger. Recycling performance inspection and testing, in the case of suspected rust, the wall thickness of the heat exchanger and pipeline is checked. Remove the aging seals on the plate heat exchanger. According to different dirt, the acid-alkali cleaning tank is used for chemical cleaning; the surface of the cleaned parts will not be corroded by chemical media. Therefore, when we find that the plate heat exchanger gasket is aging, failure, etc., we can take the above methods to deal with it. If you want to know more about the key points of knowledge of plate heat exchanger gasket models, please pay attention to the official website of Diguang Heat Transfer.