Spiral Plate Heat Exchanger
A spiral plate heat exchanger consists of two parallel metal plates rolled together to form two concentric spiral channels. Two fluids flow in opposite directions within their respective channels, exchanging heat through the metal plates. Due to its unique structure, it excels at handling viscous, particulate, or fouling fluids.
- High Heat Transfer Coefficient:: When the fluid flows within the helical channel, it experiences continuous centrifugal force due to the channel's tortuous shape. This creates a secondary circulation within the fluid, with the two fluids flowing in a purely counter-current manner within the channel. This maintains a large average temperature difference, thereby improving heat transfer efficiency.
- Strong Self-Cleaning Ability::Due to the strong turbulence and secondary circulation, the fluid continuously scours the channel walls, making it difficult for suspended particles to deposit on the walls. The single-channel design ensures that solid particles in the fluid are continuously carried forward, reducing the likelihood of clogging. Even if a small amount of scale forms, it will be washed away by the high-velocity fluid.
- Low Pressure Loss: Although the internal flow is turbulent, the continuous, smooth helical shape of the flow channel eliminates the multiple turns and impacts associated with tube boxes and tube-side baffles found in shell-and-tube heat exchangers. Therefore, the overall pressure drop is relatively low, and the pump power required to transport the fluid is also smaller.
- High Pressure Bearing Capacity: The helical channel is a rolled-up integral structure. Compared to plate heat exchangers, it has no gaskets, and each channel is a pressure-bearing shell. By using spaced column support plates, it can withstand high pressure, is not easily deformed, and has high reliability.
