A waste incineration boiler flue gas waste heat utilization and flue gas ultra-clean emission system and method

By combining the waste heat recovery tower and dechlorination spray system with the heat pump unit, the problems of insufficient heat recovery, flue gas whitening, and high wastewater treatment costs in the flue gas treatment of waste incineration boilers are solved. This achieves efficient ultra-clean flue gas emissions and heat recovery, adapts to flue gas fluctuations, and reduces energy consumption and equipment corrosion risks.

CN122129702APending Publication Date: 2026-06-02SHANDONG QINGDAHUIZHONG CLEAN ENERGY TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SHANDONG QINGDAHUIZHONG CLEAN ENERGY TECH CO LTD
Filing Date
2026-03-13
Publication Date
2026-06-02

AI Technical Summary

Technical Problem

Existing flue gas treatment technologies for waste incineration boilers are unable to adapt to fluctuations in pollutant emissions, have insufficient heat recovery, address the issue of flue gas whitening, and have high wastewater treatment costs. In particular, existing facilities cannot simultaneously optimize whitening, heat exchange, and acid removal in the flue gas from waste incineration boilers, resulting in energy waste, equipment corrosion, and high wastewater treatment costs.

Method used

The system design adopts a waste heat recovery tower combined with dechlorination spray, structured packing zone and heat pump unit. Through isenthalpic humidification, countercurrent heat exchange and circulating water treatment, it realizes three-stage heat exchange of sensible heat and latent heat of flue gas. Combined with weakly alkaline dechlorination water to treat acidic gases in flue gas, it achieves efficient heat recovery and pollutant removal.

Benefits of technology

It significantly improves heat recovery efficiency, reduces flue gas moisture content, reduces pollutant emissions, lowers wastewater treatment costs, has strong system adaptability, low equipment corrosion risk, and meets environmental protection standards.

✦ Generated by Eureka AI based on patent content.

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Abstract

This invention discloses a system and method for utilizing waste heat from waste incineration boiler flue gas and achieving ultra-clean emissions. The system includes a waste heat recovery tower, a heat exchanger and heat pump unit, a dechlorination water regulating unit, and a water treatment unit. In the waste heat recovery tower, after initial heat exchange between the flue gas and spray water, the hot water enters the heat exchanger and heat pump unit for primary and secondary heat exchange with the heat network water. After heat exchange, the heat network water is utilized within the heat network. Low-temperature water circulates back into the waste heat recovery tower for counter-current heat exchange with the flue gas, significantly reducing the moisture content in the low-temperature flue gas. This invention is applicable to scenarios such as waste incineration power plants and waste treatment plants that generate waste incineration boiler flue gas, effectively solving problems such as large fluctuations in pollutant emissions, heat waste, "white smoke" phenomenon in flue gas, and high wastewater treatment costs in existing flue gas treatment methods.
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