Powdery denitration catalyst and preparation method thereof

Abstract

The invention relate to a novel powdery denitration catalyst and a preparation method thereof. The novel powdery denitration catalyst is characterized by being prepared from the components in percentage by weight: 5-30% of active components, 15-50% of an assistant and 20-80% of an additive, wherein the active components are an oxide of Fe and an oxide of Mn, the assistant is one or more of oxidesof Ce, La, Er, Si, Al, Ca and Ti, and Au or Pt, and the additive is a mixture of one or two of active carbon or urea and one or two of melamine or glucose. The roasted active components, assistant andadditive are fully mixed and ball-milled, and the novel powdery denitration catalyst is prepared. The novel powdery denitration catalyst is environmental friendly in component, NO<x> removal activitytemperature is high, the window is wide, and denitration can be effectively achieved within the temperature range of 700-1200 DEG C.

Description

technical field [0001] The invention relates to a novel powdery denitrification catalyst and a preparation method thereof, belonging to the fields of environmental protection catalytic materials and air pollution control. Background technique [0002] Nitrogen oxides are one of the important causes of smog and acid rain, and the cement industry is the main NOx x Stationary sources of emissions are also the focus of air pollution control. Due to the lack of efficient and practical denitrification technology, the cement industry currently emits NO x Emission in general area is 400mg / m 3 , 320mg / m in key areas 3 standard. And the power industry has implemented NO x Emission in general area is 50mg / m 3 , 25mg / m in key areas 3 standard. With the increasing pressure of environmental protection, the cement industry NO x The emission standard will be implemented at 100mg / m 3 , ultra-low emissions have been implemented in some areas, requiring less than 50mg / m 3 . However...

AI Technical Summary

Problems solved by technology

Kong Xuebiao and others improved the denitrification efficiency by improving the low-nitrogen burner, but the denitrification efficiency can only reach about 50%. Some people can only meet 100mg / m through low-nitrogen combustion plus SNCR denitrification technology 3 However, it is still unable to achieve ultra-low emissions, and there is serious ammonia escape, causing secondary environmental pollution and equipment corrosion

SCR denitrification technology, the denitrification efficiency can be greater than 90%. Although it is widely used in the power industry for ultra-low emissions, the high-alkali dust in the cement industry will easily poison and deactivate the catalyst, and the high dust will easily block the catalyst, so it is difficult to be applied.