Commonly used spiral plate heat exchangers are classified into four types

Date:2019-10-24

The spiral plate heat exchanger is made up of two parallel thin metal plates with a certain interval. Two thin metal plates form two concentric spiral channels, and a distance column is welded between the two plates to maintain the channel spacing, and a cover plate is welded on both sides of the spiral plate. The cold and hot fluids pass through the two channels and exchange heat through the thin plates.

Commonly used spiral plate heat exchangers are classified into four types according to different flow modes:

(1) The two spiral channels of the I-type spiral plate heat exchanger are completely welded and sealed on both sides, which is an unremovable structure, as shown in Figure (a). In the heat exchanger, both fluids flow in a spiral, usually the cold fluid flows from the periphery to the center, and the hot fluid flows from the center to the periphery, and flows completely countercurrently. Such heat exchangers are primarily used for heat transfer between liquids and liquids.

(2) Type II spiral plate heat exchanger One side of the spiral passage is welded and sealed, and the other side is open on both sides, as shown in the picture (b). In a heat exchanger, one fluid flows along a spiral passage and the other fluid flows in the axial direction of the heat exchanger. Such heat exchangers are suitable for applications where the flow rates of the two fluids are very different, and are often used as condensers, gas coolers, and the like.

(3) The structure of the III type spiral plate heat exchanger of the type III spiral plate heat exchanger is shown in the picture (c). In a heat exchanger, one fluid makes a spiral flow, and the other fluid has a flow that combines both axial and spiral directions. This structure is suitable for vapor condensation.

(4) The structure of the G-type spiral plate heat exchanger of the G-type spiral plate heat exchanger is shown in the picture (d). The structure, also known as the tower type, is often installed at the top of the tower as a condenser, with a vertical installation and a flange at the bottom connected to the top flange. The vapor body rises from the lower portion into the central tube and is folded back to the top cover, and then condenses in the axial direction from top to bottom through the spiral passage.

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