Multifunctional rare earth sulfur-fixing denitration energy-conservation additive

Abstract

The invention discloses a multifunctional rare earth sulfur-fixing denitration energy-conservation additive, which solves the problems that the conventional sulfur-fixing agent has relatively low sulfur-fixing rate and does not have the function of reducing NOx emission. The additive is characterized by consisting of the following raw materials in percentage by mass: 8 to 10 percent of rare earth compound, 12 to 15 percent of inorganic salt, 51 to 65 percent of alkaline earth metal compound, 5 to 8 percent of aluminum compound, 5 to 8 percent of zinc compound and 5 to 8 percent of silicon compound. The additive is prepared by the following steps of: grinding the raw materials into fine particles with the particle size of 100 to 300 meshes; proportioning the particles according to the mass percentage at normal temperature; uniformly stirring and mixing; preparing powder from the mixture; and compounding. The additive has the advantages of capability of being popularized in a large area, high sulfur-fixing rate and denitration function and is suitable for coal-smoke type heavily-polluted production links.

Description

technical field [0001] The invention relates to a multifunctional rare earth sulfur-fixing and denitration energy-saving additive, which belongs to the technical field of energy conservation and emission reduction. technical background [0002] Coal is the main energy source in China. Due to the large amount of coal burned, SO 2 , CO, NOx, smoke and other emissions have caused serious soot-type air pollution in many areas of China. SO from coal combustion in China 2 Emissions account for 90% of total emissions, and NOx emissions from coal combustion account for 60-80% of total emissions. With the rapid development of the national economy, the consumption of coal is increasing year by year, which will make the soot pollution more severe. The Air Pollution Prevention and Control Law enacted by the Chinese government requires to speed up the research and development of advanced emission reduction technologies to reduce SO 2 , NOx and other pollutant emissions. In the prior...

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Problems solved by technology

[0003] The present invention is to overcome the problem that the current sulfur fixation agent has a low sulfur fixation rate and does not have the function of reducing NOx emissions, and provides a coal that is suitable for various coals and different sulfur contents, various layer-fired industrial boilers and industrial kilns Multifunctional rare earth sulfur-fixing, denitrification and energy-saving additives for various fluidized fluidized furnaces, pulverized coal furnaces, various industrial briquettes, various power coal blends, etc.

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