Compound cooling device for flue gas at outlet of denitration reactor

By adopting a rotary spiral coarse cooling structure, a Venturi flue gas guide pipe and liquid spray ring temperature equalization structure, and a pressure stabilizing structure combining phase change heat storage and heat exchange in the flue gas cooling device at the outlet of the denitrification reactor, the problems of low cooling efficiency and inaccurate temperature control were solved, achieving rapid reduction and stable control of flue gas temperature and avoiding dust removal system failure.

CN122352005APending Publication Date: 2026-07-10QINSHUISIHE GAS POWER GENERATION CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
QINSHUISIHE GAS POWER GENERATION CO LTD
Filing Date
2026-06-03
Publication Date
2026-07-10

AI Technical Summary

Technical Problem

In existing technologies, the cooling efficiency of the flue gas cooling device at the outlet of the denitrification reactor is low and the temperature control accuracy is poor, which leads to a high risk of filter bag clogging and dust collection system failure.

Method used

The composite cooling rack, including a rotating spiral coarse cooling structure, a venturi flue and liquid injection ring temperature equalization structure, and a pressure stabilizing structure combining phase change heat storage and heat exchange, achieves staged cooling and precise temperature control.

Benefits of technology

The staged cooling structure rapidly reduces the flue gas temperature, eliminates local hot spots, ensures stable outlet temperature, avoids insufficient or excessive cooling, improves cooling efficiency and temperature control accuracy, and reduces the risk of dust removal system failure.

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Abstract

This invention relates to the field of flue gas treatment technology, specifically to a composite cooling device for flue gas at the outlet of a denitrification reactor. The device includes a composite cooling rack with contraction sections on both sides. An inlet pipe and an outlet pipe are fixed to one end of each contraction section. The inlet pipe houses a flue gas coarse cooling assembly, which includes a rotating rod and a spiral coarse cooling rack. This invention employs a staged cooling structure of coarse cooling followed by fine-tuning within the cooling device. First, a rotary atomizing coarse cooling structure rapidly reduces the overall temperature of the flue gas. Then, a venturi flue gas guide combined with a liquid spray ring temperature equalization structure eliminates localized hot spots in the flue gas. Finally, a pressure-stabilizing structure combining phase change heat storage and heat exchange achieves precise control of the outlet temperature. The coarse cooling structure quickly removes most of the heat from the flue gas, while the fine-tuning structure precisely adjusts the flue gas temperature, effectively solving the problems of low cooling efficiency and poor temperature control accuracy in existing technologies.
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