A combined heat exchanger for high-temperature gas heat recovery

CN224455515UActive Publication Date: 2026-07-03SUZHOU CITY JINXIANG PRESSURE CONTAINER MFG CO LTD

Patent Information

Authority / Receiving Office: CN · China
Patent Type: Utility models(China)
Current Assignee / Owner: SUZHOU CITY JINXIANG PRESSURE CONTAINER MFG CO LTD
Filing Date: 2025-07-24
Publication Date: 2026-07-03

AI Technical Summary

Technical Problem

Existing high-temperature gas heat exchange equipment is inefficient in recovering heat from high-temperature gases, especially for gases with high flow rates and large volumes, where the heat recovery rate is low.

Method used

The system employs a central plate and spiral plate heat exchangers arranged vertically within the cylinder, and designs a first channel and a second channel. Sealing structures are installed at the upper and lower ends of the channels. High-temperature gas flows radially, and the heat exchange time is extended by multiple sets of spiral plate heat exchangers. The system absorbs heat in stages by combining the sealing structure and the density difference of the heat-absorbing medium.

Benefits of technology

It significantly improves the heat recovery rate of high-temperature gases, and is particularly suitable for high-temperature gases with fast flow rates and large flow volumes, extending the heat exchange time and improving heat recovery efficiency.

✦ Generated by Eureka AI based on patent content.

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Figure CN224455515U_ABST

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Abstract

This utility model provides a combined heat exchange device for high-temperature gas heat recovery, comprising a cylinder, a central plate, and a spiral plate heat exchanger. The spiral plate heat exchanger has a first channel and a second channel. By setting sealing structures at the upper and lower ends of the first and second channels and the central plate, the outermost part of the first channel is connected to the first pipe, the part of the first channel that is in contact with the central plate is connected to the second pipe, the part of the second channel that is in contact with the central plate penetrates downward through the sealing structure to form a second inlet, and the upper outermost part of the second channel penetrates through the sealing structure to form a second outlet. This device forces high-temperature gas to enter radially from the second inlet, pass through the second channel, and exit from the second outlet, exchanging heat with the heat-absorbing medium flowing through the first channel to achieve heat recovery. Furthermore, by using multiple sets of spiral plate heat exchangers spaced apart along the axial direction of the cylinder, the total length of the second channel is increased, thereby improving the heat recovery rate. It is particularly suitable for heat recovery of high-temperature gases with high flow rates and large volumes.

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