Plate heat exchanger is an ideal equipment for liquid liquid and liquid steam heat exchange.

In general, we mainly distinguish plate heat exchangers according to their structures, that is, according to their shapes, they can be divided into four categories: ① removable plate heat exchangers (also called plate heat exchangers with sealing gaskets), ② welded plate heat exchangers, ③ spiral plate heat exchangers, ④ plate roll heat exchangers (also called honeycomb heat exchangers).

Among them, welded plate heat exchanger is divided into semi welded plate heat exchanger, all welded plate heat exchanger, plate shell heat exchanger and brazed plate heat exchanger.

The following classifications are often used:

1 According to the heat exchange area in the unit space, the plate heat exchanger is a compact heat exchanger, which is mainly compared with the shell and tube heat exchanger. The traditional shell and tube heat exchanger occupies a large area.

2 According to the process use, there are different names: plate heater, plate cooler, plate condenser, plate preheater;

3 According to the process combination, it can be divided into single pass plate heat exchanger and multi pass plate heat exchanger;

4 According to the flow direction of the two media, it can be divided into parallel flow plate heat exchanger, counter flow plate heat exchanger and cross flow plate heat exchanger;

5 According to the gap size of the flow channel, it can be divided into conventional gap plate heat exchanger and wide gap plate heat exchanger;

6 According to the corrugation, there are more detailed differences between plate heat exchangers, which will not be described again. Please refer to the corrugation form of plate heat exchangers.

7 According to whether it is a complete product, it can be divided into single plate heat exchanger and plate heat exchanger unit.