Plate heat exchangers are prone to leakage during operation. There are many reasons for the leakage. According to different reasons, the method of dealing with the leakage of the plate heat exchanger is also different. Below we will discuss the leakage of the plate heat exchanger. The reasons are briefly analyzed and summarized, and corresponding solutions are proposed.
Causes of leakage:
1. The clamping size is not in place, the size is uneven everywhere (the size deviation should not be greater than 3mm) or the clamping bolts of the plate heat exchanger are loose.
2. Part of the gasket is out of the sealing groove, there is dirt on the main sealing surface of the gasket, the gasket is damaged or the gasket is aging.
3. The plate is deformed and the assembly misalignment causes the running pad.
4. There are cracks in the sealing groove of the plate or the second sealing area.
How to deal with leakage:
1. In the no-pressure state, re-clamp the equipment according to the clamping size provided by the manufacturer, the size should be uniform, and the deviation of the compaction size should not be greater than ±0.2N (mm) (N. is the total number of plates), two The parallelism between the compression plates should be kept within 2mm.
2. Make a mark on the leaking part, and then the plate heat exchanger will be disassembled and solved one by one, and then reassemble or replace the gaskets and plates.
3. Disassemble the heat exchanger, repair the deformed parts of the plate or replace the plate. When there is no spare part for the plate, the plate at the deformed part can be temporarily removed and then reassembled for use.
4. When reassembling the disassembled plates, the plate surface should be cleaned, and the plate heat exchanger should prevent dirt from adhering to the gasket sealing surface.