Purifying agent for complex pellet flue gas

Abstract

The invention discloses a purifying agent for complex pellet flue gas, and belongs to the technical field of complex pellet flue gas purification in the iron and steel industry. The purifying agent comprises 70-80 wt% of pulverized coal, 5-8 wt% of a suspending agent, 10-13 wt% of tar, 3-6 wt% of high-temperature asphalt and 2-3 wt% of titanium dioxide nanotubes. Preparation, mixing, profiling, carbonization, spraying and standing, activation and the like are carried out to obtain the efficient purifying agent. The efficient purifying agent is high in micropore rate and large in specific surface area, the problems of complex pellet flue gas desulfurization, denitration and heavy metal removal are solved, the problems of dioxin removal, F<-> removal and Cl<-> removal are solved, multi-pollution synergistic purification is achieved, valuable sulfur resources are recycled, and the efficient purifying agent can adapt to fluctuation of flue gas flow and pollutant concentration. The efficient purifying agent is adopted to replace the existing test case for treating the complex pellet flue gas with the active carbon, such that the efficient purifying agent has characteristics of high micropore volume, high desulfurization and denitration efficiency, and high F<-> and Cl<-> removal efficiency.

Description

technical field [0001] The invention belongs to the technical field of complex pellet flue gas purification in the iron and steel industry, and in particular provides a purification agent for complex pellet flue gas, which is an efficient and reliable complex pellet flue gas efficient adsorption and multi-polluting synergistic integration Removal, desulfurization, denitrification, dioxin removal, heavy metal removal and F removal for complex pellet flue gas - , Cl - It can adapt to fluctuating flue gas flow and pollutant concentration. Background technique [0002] As national environmental protection gradually develops flue gas from dust removal to desulfurization and denitrification in the iron and steel industry, and the emission standards are further stringent, the removal of dioxins and heavy metals will be proposed in the near future, and even the F - , Cl - removal of ions. Iron and steel is a pillar industry of the country. In 2018, my country's crude steel outpu...

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Problems solved by technology

[0006] The purpose of the present invention is to provide a high-efficiency purification agent for complex pellet flue gas, which not only solves the complex problems of pellet flue gas desulfurization, denitrification, and heavy metal removal, but also solves the increasingly stringent emission standards and complex flue gas characteristics. To remove dioxin and remove F - , Cl - difficult problems; the purification agent has achieved desulfurization, denitrification, heavy metal removal, dioxin removal and F removal for pellet flue gas - , Cl - Efficient and synergistic removal, the purified agent after removal can be regenerated and release high-concentration SO 2 Recycled, regenerated decontaminants are reused

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