A flue gas reheating device after wet flue gas purification

By employing a multi-layer heating and cooling structure in the flue gas reheating equipment, combined with a mixing device and gas pipe valve control, the problem of flue gas temperature regulation was solved, achieving stable emission of purified flue gas and reducing the risk of white smoke formation.

CN115899744BActive Publication Date: 2026-03-06JILIN TONGXIN THERMAL POWER GRP CO LTD
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Patent Information

Application Number
CN202211639803.2
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2022-12-20
Publication Date
2026-03-06
Estimated Expiration
2042-12-20

AI Technical Summary

Technical Problem

Existing flue gas reheating equipment cannot transfer the heat energy of unpurified flue gas to purified flue gas in different temperature segments, making it difficult to control the temperature of purified flue gas and making it difficult to eliminate white spots in flue gas.

Method used

Design a flue gas reheating device after wet flue gas purification. It adopts multiple cylindrical cavities and curved duct structures, combined with heating and cooling devices. The device mixes and regulates the purified flue gas at different temperatures through a mixing device, and controls the flue gas flow rate using gas pipe valves to achieve segmented heating and cooling, ensuring that the flue gas temperature is stable at 80℃ during emission.

Benefits of technology

It achieves stable temperature control of purified flue gas, reduces the relative moisture content of white smoke, avoids white smoke formation, and improves the efficiency and stability of flue gas reheating.

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Abstract

This invention relates to the field of flue gas reheating technology, and more particularly to a flue gas reheating device after wet flue gas purification. The device includes a base, an inlet pipe, a purification rod, an unpurified gas pipe, a first curved gas pipe, a second curved gas pipe, a third curved gas pipe, a fourth curved gas pipe, a first cylindrical cavity, a second cylindrical cavity, a third cylindrical cavity, a fourth cylindrical cavity, a first curved guide tube, a second curved guide tube, a third curved guide tube, a fourth curved guide tube, a mixing device, a heating device, and a cooling device. The first cylindrical cavity, the second cylindrical cavity, the third cylindrical cavity, and the fourth cylindrical cavity are sequentially installed from bottom to top on the upper end of the base. This invention uses multiple cylindrical cavities to heat the flue gas in layers and stages. The mixing device mixes the flue gas heated to different temperatures, and the flue gas flow rate in each curved guide tube can be adjusted via gas pipe valves to regulate the temperature of the flue gas to be emitted, ensuring the purified gas is emitted at a stable temperature of 80°C and preventing the formation of white smoke.
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