已被广泛应用于食物、机械、冶金、石油化工和船只等领域，但使用时间过长在运用中就会呈现一些毛病，对其毛病进行修补后需要检修，那具体是怎么操作的，下面一起了解下： Plate heat exchangers
have been widely used in food, machinery, metallurgy, petrochemicals and ships. However, if they are used for a long time, there will be some problems in use. After repairing the defects, they need to be repaired. Yes, let ’s understand together:
1. Bare cold (1) Bare cold experiments should be performed after the plate heat exchanger is overhauled, and it should be carried out according to the rules of equipment technical documents or bare cold plans.
(2) Check the low-temperature deformation and compensation functions of equipment, piping, valves, etc. during bare-cold experiments, and distinguish whether there are leaks according to the condition of frost, and mark the leaked parts with symbols.
2. Check the plate heat exchanger (1) After the heat exchanger is repaired, make a full inspection. After the application is completed, all repair projects must be completed, and the repair quality must meet the requirements. There should be no repair records for all repair projects. When the project is handed over for inspection, the construction unit shall provide the complete handover data according to the repair content.
(2) The site should be cleaned and cleaned so that the work is completed, the materials are exhausted and the place is clean.
(3) Clean the entire equipment system to ensure that the plate heat exchanger pipeline valves are unobstructed. Each accessory of the equipment should be complete and flawless, the appearance switching control system works flawlessly, the switching valve is active, reliable, and meets technical requirements.
(4) Load test and inspection, the policies should reach the technical requirements. During the inspection, the plate heat exchanger should be checked for leaks and abnormal noises. If no leaks, medium series, temperature and pressure are within the allowable value, the inspection is qualified. If there are no abnormalities in 24 hours of continuous operation, the product can be delivered.
After repairing, there is not necessarily no problem. This requires maintenance before use. We can only run the plate heat exchanger if it is determined that there is no problem. In this way, we can maximize the benefits.