Type:

a、 Non detachable. The spiral plate heat exchanger after rolling is welded at both ends and cannot be disassembled to form a fixed structure, and the inside of the flow channel cannot be touched. It is suitable for fluid heat exchange that is not easily clogged. Non detachable structures are divided into horizontal and vertical types.

b、 Detachable. After rolling, the spiral plate heat exchanger is welded with only one channel at each end, while the other channel is open. Then, an end cap is added to the end face for sealing, and the end cap can be removed to clean the inside of the channel. It is suitable for fluid heat exchange that is prone to clogging.

c、 Special form. Some spiral plate heat exchangers used in the chemical industry require special structures according to the requirements of the processing technology, with heads, end caps, or two heat exchangers connected in series at both ends, with different structures.

For both heat exchange media, if they are liquids, they should flow in a countercurrent manner in the flow channel of the spiral plate heat exchanger. The so-called counterflow refers to the flow of two liquids in opposite directions along a spiral channel in two adjacent channels for heat exchange, which can maintain a certain temperature difference between the two fluid media and achieve the best heat transfer effect. For the two media used for heat exchange, one is liquid and the other is gas, they flow in a cross flow manner in a spiral plate heat exchanger. That is, the liquid flows in the spiral direction in the heat exchanger, while the gas passes directly in the axial direction of the heat exchanger. This is mainly due to the characteristics of the gas, which generally requires a large flow rate and low resistance, or is used for steam condensation. Therefore, the gas is generally not allowed to flow in the spiral direction.