The spiral plate heat exchanger is composed of two parallel steel plates, rolled into mutually spaced spiral flow channels. Cover plates are welded on both ends of the spiral plate. The hot and cold fluids flow in the two flow channels respectively. Its performance characteristics are as follows:
(1) Spiral plate heat exchanger has high heat transfer efficiency (good performance)
It is generally believed that the heat transfer efficiency of the spiral plate heat exchanger is 1 to 3 times that of the tubular heat exchanger. There is no flow dead zone in a single channel with constant cross section. The perturbation of the spaced column and the spiral channel to the flow reduces the critical Reynolds number of the fluid. When water-water heat exchange, the heat transfer coefficient of the spiral plate heat exchanger can reach up to 3000W/(㎡·K).
(2) Effective recovery of low temperature heat energy
The spiral plate heat exchanger is made of two rolls, which recover waste heat and make full use of low-temperature heat energy.
(3) Spiral plate heat exchanger has strong operating reliability
The end surface of the spiral channel of the non-detachable spiral plate heat exchanger is sealed by welding, so it has a high sealing performance and ensures that the two working media are not mixed.
(4) Spiral plate heat exchanger has low resistance
The connection pipe on the shell adopts a tangential structure. It has relatively low pressure loss. It can handle large-volume steam or gas and has the ability to clean itself. Because the medium flows in a spiral pattern, dirt is not easy to deposit and easy to clean. It can be rinsed with steam or lye, which is simple and easy to use, and is suitable for installing cleaning devices. The medium goes through a single channel, allowing the flow rate to be higher than other heat exchangers.
(5) Multiple units can be used in combination
When a single device cannot meet the requirements for use, multiple devices can be used in combination. But the combination must meet the following requirements: parallel combination, series combination, the same distance between equipment and channels. Mixed combination: One channel is connected in parallel and one channel is connected in series.