A flue gas purification system coupled with desulfurization, denitrification and carbon capture driven by waste heat of flue gas and flue gas treatment method

Abstract

The invention provides a smoke gas afterheat driving desulfurization, denitration and carbon capture coupling smoke gas purification system and a smoke gas treatment method, and relates to a smoke gaspurification system and a smoke gas treatment method. In order to solve the problems that the cost of the existing desulfurization, denitration and carbon dioxide capture aiming at an industrial boiler is high, and the smoke gas utilization difficulty of the industrial boiler is great, the smoke gas afterheat energy is used for partially driving the desulfurization, denitration and carbon capturecoupling smoke gas purification process; then, the desulfurization, denitration and carbon capture are integrated; the smoke gas afterheat resources are effectively utilized; the fuel utilization efficiency is integrally improved; the comprehensive cost of the smoke gas desulfurization, denitration and carbon capture is reduced; the desulfurization rate reaches 98 percent; the denitration rate reaches 85 percent; the carbon capture rate reaches 98 percent. The system provided by the invention is applicable to desulfurization, denitration and carbon capture.

Description

technical field [0001] The invention relates to a flue gas purification system and a flue gas treatment method. Background technique [0002] For industrial boilers, waste heat loss of flue gas accounts for 10% or more of the total energy. However, because this part of the flue gas is concentrated in the range of 100-150 °C, it is a low-grade waste heat resource, which has not been effectively utilized due to the difficulty of utilization and the high cost of utilization. Sulfur dioxide and nitrogen oxides are the main gas pollutants in flue gas, and they are also the main factors causing acid rain. In order to improve the atmospheric environment, boiler air pollution emission standards are becoming more and more stringent; the existing mainstream desulfurization and denitrification technologies are limestone / gypsum wet desulfurization technology and selective catalytic reduction denitrification technology; the burden on the flue gas purification system is also becoming hea...

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Problems solved by technology

[0003] In order to solve the existing problems of high cost of desulfurization, denitrification and carbon dioxide capture for industrial boilers and the difficulty of utilizing industrial boiler flue gas, the present invention proposes a coupled desulfurization, denitrification and carbon capture driven by waste heat of flue gas Flue gas purification system

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