Composite denitration agent and preparation method thereof

Abstract

The invention belongs to the technical field of denitration, and discloses a composite denitration agent which is mainly prepared from talcum powder, phyllosilicate, ferric oxide, lanthanum oxide, barium oxide, urea, an oxidizing agent, an organic binder, an inorganic binder, carboxymethyl cellulose, a surfactant, a dispersing agent, polyhydric alcohol and other raw materials. The talcum powder and the phyllosilicate are used as carriers of the denitration agent, so that the thermal stability of the denitration agent is higher than that of a denitration agent with TiO2 as a carrier at a high temperature; the potassium oxide is loaded on the carrier, so that the denitration efficiency of the denitration agent can be effectively improved; the ferric oxide, lanthanum oxide, barium oxide and urea are used as denitration active components, so that the compounding effect of the denitration active components is efficiently achieved, and a complex with stable performance is favorably formed; in addition, the organic binder and the inorganic binder are added at the same time, so that the active centers of the active components can be highly dispersed, structural collapse caused by calcination of the denitration agent is prevented, and the high activity and high thermal stability of the denitration agent are further guaranteed. The invention also provides a preparation method of the denitration agent.

Description

technical field [0001] The invention belongs to the technical field of denitrification, and in particular relates to a composite denitrification agent and a preparation method thereof. Background technique [0002] Soot, sulfur dioxide, nitrogen oxides (NO X ) and other harmful substances are the main causes of environmental problems such as air pollution, acid rain, and greenhouse effect. How to effectively remove SO in flue gas 2 and NO X It has attracted the attention of researchers all over the world. Among them, nitrogen oxides are currently one of the most important air pollutants, which mainly come from the waste gas produced by the combustion of coal, oil, and natural gas used in production and life, of which about 70% come from the direct combustion of coal, which is It is the main cause of acid rain, photochemical smog and the hole in the ozone layer, which has caused great harm to the ecological environment, industrial and agricultural production, and human hea...

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Problems solved by technology

[0003] The use of denitration agents to denitrify flue gas is expected to fundamentally control the emission of nitrogen oxides, but the existing denitrification agents are mainly V 2 o 5 -WO 3 (MoO 3 ) / TiO 2 series, where TiO 2 As a carrier, it accounts for a large proportion of denitration agent components, and the cost of titanium dioxide is relatively high, resulting in high production costs of denitration agents, and this type of denitration agent has high denitration activity, but its thermal stability is poor, and the denitration effect is not enough. Ideal, so it cannot meet actual needs

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