Desulphurization and denitrification agent and preparation method thereof

Abstract

The invention discloses a desulfurization and denitrification agent and a preparation method thereof, and belongs to the technical fields of tailing recycling and industrial smoke gas treatment. The desulfurization and denitrification agent includes 5-45% of phosphate rocks or phosphate tailings, 5-25% of iron slag, 5-30% of manganese slag, 5-35% of zinc slag, 1-10% of copper slag, 5-15% of red mud, 10-35% of rare earth tailings and 1-10% of coal gangue. The preparation method of the desulfurization and denitrification agent comprises the following steps: respectively grinding above solid byproducts to about 200-300 meshes, mixing the crushed powders according to a certain ratio, calcining the obtained powder mixture in a muffle furnace at 800-1200 DEG C for 1-3 h to make a porous material, and crushing the porous material to form 80-100 mesh powder which is the novel desulfurization and denitrification agent. The method has the advantages of simple process, high desulfuration and denitrification efficiency, realization of slag recycling while achieving industrial smoke purification, and significant economic and environmental benefits.

Description

technical field [0001] The invention relates to a desulfurization and denitrification agent and a preparation method thereof. Specifically, an industrial flue gas desulfurization and denitrification agent is prepared by using solid by-products in the production processes of phosphorus chemical industry, non-ferrous metal smelting and coal mining, and belongs to the utilization of tailings resources and industrial flue gas. Governance technology field. Background technique [0002] Industrial flue gas is the main source of air pollution. Flue gas contains a large amount of sulfide and nitrogen oxides, which are toxic to human body and ecosystem, and are also the main cause of acid rain. Existing desulfurization and denitrification technologies have large investment and high operating costs. , the pipeline is easy to corrode, the process flow is complicated, and the operation is complicated. The study of desulfurization and denitrification technology is of great significance to...

AI Technical Summary

Problems solved by technology

There are many problems in the existing desulfurization and denitrification technology, such as: the limestone-gypsum method requires a large investment in equipment, high desulfurization costs, and the large amount of gypsum produced is difficult to handle; SCR technology has a large catalyst investment, a large impact on flue gas components, and high operating costs. Problems, SNCR technology has a series of problems such as high reaction temperature, poor mixing degree of reducing agent and flue gas, low denitrification efficiency, and large amount of ammonia gas escape.

Therefore, the joint desulfurization and denitrification technology has problems such as high fixed investment, high operation and maintenance costs, and complicated operation.