Multi-spiral-path chasing

Abstract

A spiral plate heat exchanger with multiple spiral channel consists of shell, spiral body, sealing, outlet and inlet . The said spiral body is prepared by applying star central division plate and multiple concentric spiral plates in equal number to branching ends of star central division plate , setting multiple distance columns or distance blocks arranged in interval on one side surface of each spiral plate for forming multiple spiral channels to let heat exchanging fluid flow through .

Description

Technical field [0001] The invention relates to a spiral plate heat exchanger, in particular to a multi-spiral channel spiral plate heat exchanger with at least three spiral channels. Background technique [0002] The well-known spiral plate heat exchanger in the prior art is mainly composed of four parts: shell, spiral body, seal and inlet and outlet. The specific structure varies with different types, but in various types of spiral plate heat The spiral body of the heating element is composed of two rolled concentric spiral metal plates, that is, the spiral plate and the central partition. The inner ends of the two spiral plates are respectively welded to the two ends of the central partition. One side surface of the spiral plate is provided with a plurality of spaced spaced columns or spaced bubbles to ensure the channel spacing between the spiral plates. Cold and hot fluids flow on both sides of the spiral plate and exchange heat through the spiral plate. , the end face...

AI Technical Summary

Problems solved by technology

[0006] As a pressure vessel, since the known spiral plate heat exchanger adopts a metal plate rolling structure with one channel for fluid, the fluid pressure of the innermost ring and the outermost ring of the channel is not much different, and the circumferential stress generated by the fluid pressure The maximum value occurs at the outermost end of the spiral plate. This is because the circumferential stress is proportional to the diameter of the location. Therefore, for strength considerations, the outer diameter of the spiral plate heat exchanger is usually limited. In the geometry of the spiral body Among the dimensions, the width of the spiral channel is related to the fluid capacity, and the length of the spiral plate is related to the heat exchange area. Increasing the width of the spiral channel can increase the fluid flow cross-section, increase the flow rate of the heat exchange fluid, and further improve the fluid capacity and handling capacity of the heat exchanger. Capacity, while increasing the length of the spiral plate can increase the heat transfer area of ​​the heat exchanger and improve the heat exchange capacity of the heat exchanger. In the case of limiting the outer diameter of the spiral plate heat exchanger equipment, the width of the spiral channel and the length of the spiral plate It is a pair of contradictory two aspects, increasing the width of the spiral channel will inevitably reduce the length of the spiral plate, and increasing the length of the spiral plate will also reduce the width of the spiral channel, so for the known 2-spiral channel spiral plate heat exchange However, the method of increasing the fluid flow by increasing the width of the spiral channel is limited. The flow rate of the heat exchange fluid cannot be greatly increased, the processing capacity of the heat exchanger cannot be greatly improved, and the operation under large flow cannot be realized. , and, for the known 2-spiral channel spiral plate heat exchanger, at most two fluids can only exchange heat at the same time

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