What is the working principle of spiral plate heat exchanger?

The hot and cold process media enter their respective dedicated spiral flow channels from the tangential pipes at both ends of the equipment, ensuring that they do not come into contact with or mix with each other throughout the process, thus preventing cross-contamination.The channel spacing can be customized according to the medium's flow rate, viscosity, and pressure. It can be designed with equal spacing or adapted to non-equal spacing according to the working conditions, taking into account the flow requirements of different media and meeting the diverse process parameter requirements of overseas customers.

The equipment adopts a full counter-current flow design, in which the hot and cold media flow in opposite directions along the spiral flow channel, which is the core key to its high heat exchange efficiency.Compared to co-current and cross-current modes, counter-current flow allows the two media to maintain a uniform and large logarithmic mean temperature difference throughout the entire heat exchange process.By maximizing the use of heat transfer driving force, ideal heat exchange effect can be achieved even when dealing with heat exchange media with small temperature differences, greatly improving the thermal energy utilization rate and helping overseas enterprises save energy and reduce consumption.

Following Fourier's law of heat conduction, the heat carried by the high-temperature medium is rapidly transferred to the low-temperature medium through the walls of the highly thermally conductive metal heat exchange plate, thus completing the heat exchange.The heat exchange plate wall, as the sole heat transfer medium, is made of materials such as carbon steel, stainless steel, and titanium alloy, which are suitable for different corrosive media conditions. It has stable thermal conductivity, extremely low heat transfer loss, and ensures that the heat exchange efficiency consistently meets the standards.

The combined effect of the spiral flow channel's arc-shaped structure and the spaced columns between the plates forces the medium to form a strong turbulent state during flow, effectively disrupting the laminar boundary layer formed when the medium is close to the plate wall (the boundary layer is the main source of thermal resistance in heat transfer).