Structural principle of spiral plate heat exchanger: the detachable plate heat exchanger is composed of many corrugated thin plates at a certain distance, which are sealed with gaskets and overlapped by frames and compression screws. The four corner holes of the plate and gasket form a fluid distribution pipe and a collection pipe, and at the same time, the cold and hot fluids are reasonably separated, so that they flow in the flow channels on both sides of each plate and exchange heat through the plates. Structure and performance of spiral plate heat exchanger: The equipment consists of two coils, forming two uniform spiral channels. The two heat transfer media can flow in full countercurrent, which greatly enhances the heat transfer effect. Even two media with small temperature difference can achieve ideal heat transfer effect. The nozzle on the shell adopts tangential structure, and the local resistance is small. Because the curvature of the spiral channel is uniform, there is no big turn in the liquid flow in the equipment, and the total resistance is small, so the design flow can be improved and it has high heat transfer capacity.
The end face of spiral channel of I-type non-detachable spiral plate heat exchanger is sealed by welding, which has good sealing performance. The structural principle of Type II detachable spiral plate heat exchanger is basically the same as that of non-detachable heat exchanger, but it can be disassembled and cleaned in one channel, which is especially suitable for heat exchange with viscous and precipitated liquids. The structural principle of type ⅲ detachable spiral plate heat exchanger is basically the same as that of non-detachable heat exchanger, but its two channels can be disassembled and cleaned, and its application range is wide. When a single device cannot meet the use requirements, multiple devices can be combined, but the following requirements must be met when combining: parallel combination, series combination, and the same distance between devices and channels. Mixed combination: one in parallel and one in series.