Plate heat exchanger in addition to the maintenance in special circumstances, but also should carry out regular maintenance. Because the plate heat exchanger is convenient to disassemble and assemble, the maintenance is simple, generally do not need special tools and equipment. Different methods can be used according to different situations. If there is no leakage in the equipment, but the heat transfer system K has decreased, the heat exchanger can not be opened, and a closed-circuit system can be used to inject the descaling liquid into the equipment for a few hours. There is no such condition on site, and when the equipment is disassembled or scaling is not found to be too serious, you can not remove the plate and wash it directly with water, and at the same time, you can scrub with a soft brush.