Novel dry-method cement kiln catalytic desulfurization agent and preparation and application methods thereof

Abstract

The invention discloses a novel dry-method cement kiln catalytic desulfurization agent and preparation and application methods thereof. The catalytic desulfurization agent capable of reducing the sulfur dioxide emission of a cement enterprise comprises a powder agent and an aqueous solution, wherein the powder agent is prepared from, by mass percent, 45-65% of calcium carbonate, 28-45% of calciumoxide, 0.1-1% of ferric oxide, 1-6.5% of magnesium oxide, 0.5-1.5% of barium carbonate, 1-5% of rare element compound, 3-5.5% of silicon dioxide and the balance dolomite and fluorite, and the total mass percentage of all the components is 100%. Experimental determination shows that when the additive weight ratio of the novel dry-method cement kiln desulfurization and denitrification composite agent is 0.10-1.50% of the mass of raw materials and the use amount of the aqueous solution is 1.0-3.0 m<3> / h, the emission of SO2 can be reduced by not less than 90%, and the emission quantity of the SO2is not more than 100mg / m<3>.

Description

technical field [0001] The invention relates to the field of environmental protection and energy saving, in particular to a dry-process cement kiln desulfurizer. Background technique [0002] With the steady and rapid development of my country's national economy, the cement industry has achieved unprecedented development, and my country has become a well-deserved cement power. Subsequently, the pollution problem of the cement industry has become the focus of national and social attention. In 2013, the Ministry of Environmental Protection and the General Administration of Quality Supervision, Inspection and Quarantine issued the revised "Emission Standard of Air Pollutants for the Cement Industry" (GB-4915-2013), which greatly reduced the emission limits of particulate matter, nitrogen oxides, sulfur dioxide and other pollutants in the cement production line value. The standard stipulates that the emission limit of sulfide in flue gas is 100mg / m³. The emission of sulfur di...

AI Technical Summary

Problems solved by technology

[0003] At present, there are many types of desulfurization agents and desulfurization technologies in the market. Whether it is wet desulfurization, dry desulfurization or ammonia desulfurization, it is not ideal in terms of investment cost, operating cost, and desulfurization efficiency. At the same time, there are many problems in the process of system operation.