What Should be Paid Attention to When Cleaning the Plate Heat Exchanger
As we all know, the plate heat exchanger needs to be cleaned after a long time of use. The purpose of this is to prevent it from blocking. However, when cleaning the heat exchanger, it is not OK to wash it casually, and there are many precautions. Now let’s introduce what we should pay attention to when cleaning the heat exchanger.
1. Avoid splashing oil substances such as cleaning oil or paint on the heat transfer body of the equipment to prevent swelling and fracture of the exposed gasket. For stainless steel plate heat exchangers, it is strictly forbidden to use hydrochloric acid (HCl) or hydrochloric acid cleaning agents and cleaning powders (even if a certain amount of corrosion inhibitor is added) for chemical descaling and cleaning, especially for the whole machine cleaning without dismantling. This is because the scale residue (containing residual chlorine) that is not fully dissolved is difficult to clean in the multi crevice structure, and alkali neutralization cannot be fully carried out. Nitric acid plus corrosion inhibitor or nitric acid detergent and cleaning powder can be used for cleaning. Proper heating can improve the cleaning efficiency.
2. Due to the poor oil resistance of the sealing material of the plate heat exchanger with ethylene propylene gasket, avoid undue leakage accidents when maintaining and painting and cleaning equipment.
3. When installing the equipment piping, the welding wire should not be lapped on the equipment, but should be lapped on the pipe of the piping, so as to prevent the contact in the plate from being punctured by the welding current. This phenomenon has often occurred during the installation of equipment.