The core structure of a through-type spiral plate heat exchanger is based on a flow channel formed by a spiral plate. Its main difference from conventional spiral plate heat exchangers lies in the fluid flow pattern. Specific structural features include
Core component:
It consists of two parallel metal plates (usually carbon steel, stainless steel, or titanium) rolled into a spiral shape, forming two separated spiral channels (the channels are maintained apart by spacers).
Flow Path:
- One fluid flows along the spiral channel (called "spiral flow"), where the curved surface of the spiral plate forces turbulence, enhancing heat transfer.
- The other fluid flows axially through the channel (called "axial flow"), entering the heat exchanger axially at one end, passing directly through the center or periphery of the spiral channel, and exiting axially at the other end, avoiding detours along the spiral path.
Seals and Piping:
Both ends are sealed with end caps. Inlet and outlet pipes for spiral and axial flow are located on the sides and ends of the heat exchanger, respectively, to ensure complete isolation and prevent mixing of the two fluids.
Main Applications
Industrial heating/cooling
For example, preheating reactor feeds and cooling overhead fractions in chemical production; heating/cooling crude oil or light oil in the petroleum industry.
Heat exchange for fluids containing small amounts of impurities
Due to the lack of dead zones and high turbulence intensity of the spiral channel, they can handle fluids containing small amounts of particles, fibers, or low viscosity (such as heating fruit juice in the food industry and cooling liquid medicine in the pharmaceutical industry).
Condensation/evaporation
Suitable for condensing low-viscosity media (such as condensing organic solvent vapor) or evaporating them (such as concentrating dilute solutions).
Waste heat recovery
Suitable for recovering waste heat from industrial wastewater and exhaust gases (such as heat exchange between boiler flue gas and circulating water).
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