High-temperature flue gas dechlorination system suitable for waste incineration power plant

By designing a high-temperature flue gas dechlorination system including a cooling and dust removal device, a dechlorination reaction device and a dechlorination agent regeneration device, the problems of poor dechlorination and low thermal efficiency of flue gas in the prior art have been solved, and efficient and stable flue gas dechlorination and the improvement of thermal efficiency of power plants have been achieved.

CN119701623APending Publication Date: 2025-03-28HUNAN JUNXIN ENVIRONMENTAL PROTECTION CO LTD
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Patent Information

Application Number
CN202411781340.2
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-05
Publication Date
2025-03-28

AI Technical Summary

Technical Problem

The flue gas dechlorination technology of existing domestic waste incineration power plants has problems such as poor dechlorination effect, severe corrosion of the heated surface of waste heat boiler, low thermal efficiency, low utilization rate of dehydration agents, and discontinuous regeneration of dehydration agents.

Method used

A high-temperature flue gas dechlorination system including a cooling and dust removal device, a dechlorination reaction device and a dechlorination agent regeneration device is designed. The system improves the flue gas cooling effect by setting two-stage cooling mechanisms outside the cooling and dust removal device, and connects the dechlorination agent regeneration device with the dechlorination reaction device to realize the continuous supply of dechlorination agent and the continuous discharge of waste dechlorination agent.

Benefits of technology

This system effectively reduces the chlorine-containing gas in the flue gas, reduces corrosion on the heated surface of the waste heat boiler, improves the thermal efficiency of the power plant, and improves the utilization rate of dechlorination agents, ensuring the stability and purification effect of the system.

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Abstract

The invention discloses a high-temperature flue gas dechlorination system suitable for a waste incineration power plant. The high-temperature flue gas dechlorination system comprises a cooling dust removal device, a dechlorination reaction device and a dechlorination agent regeneration device, the input end of the cooling dust removal device is connected to the garbage incinerator, the output end of the cooling dust removal device is connected to the dechlorination reaction device, and the dechlorination agent regeneration device is connected with the dechlorination reaction device and used for collecting a waste dechlorination agent generated after flue gas dechlorination and feeding the regenerated dechlorination agent into the dechlorination reaction device again; a two-stage cooling mechanism is arranged on the outer side of the cooling and dust removing device, and high-temperature flue gas discharged by the garbage incinerator enters the cooling and dust removing device for cooling and gas-solid separation and then enters the dechlorination reaction device for dechlorination. The device has the characteristics of compact structure, high stability, good purification effect and the like, and the dechlorination treatment efficiency of high-temperature flue gas and the utilization rate of a dechlorination agent are improved.
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