A kind of sulfur dioxide desulfurization method

Abstract

A sulfur dioxide desulfurization method, the desulfurization raw materials used include calcium powder, barium powder, transition metal catalyst; calcium powder, barium powder, transition metal catalyst include two kinds of solid and liquid, solid calcium powder and barium powder, transition metal catalyst are respectively located in powder In the chamber and the transition metal catalyst chamber, the calcium powder and barium powder liquid aqua, and the transition metal catalyst aqua liquid are located in the desulfurization aqua tank; the calcium powder includes Ca(OH) 2 , CaO, barium powder including Ba(OH) 2 and BaCO 3 , the catalyst includes V2O5, TiO2, MnO2, Fe2O3 mixture; the desulfurization process includes SO 2 Residual SO after sulfur fixation and calcination of cement raw materials 2 , Fuel waste gas SO in cement calcination 2 Desulfurization. The present invention can treat the SO produced in the calcination of cement raw materials 2 Carry out sulfur fixation treatment, and the residual SO discharged into the flue after calcination of cement raw materials 2 , SO in exhaust gas produced by calcining fuel 2 The desulfurization treatment has simple process, low cost and thorough desulfurization effect, which overcomes the disadvantages of high treatment cost and incomplete desulfurization in the prior art.

Description

technical field [0001] The invention relates to the technical field of waste gas treatment in cement plants, in particular to a sulfur dioxide desulfurization method. Background technique [0002] With the continuous development of the cement industry, many cement enterprises have sulfur dioxide (SO 2 ) The problem of excessive emissions. SO 2 Sources include raw meal and fuel in cement production. Sulfur dioxide (SO 2 ) emissions are mainly from low-valence sulfides (such as FeS ferrous sulfide, FeS 2 Ferrous disulfide, etc.) are oxidized, such as pyrite and marcasite (both FeS 2 ), and some monosulfide compounds (such as FeS), etc. Sulfur dioxide (SO in fuel) 2 ) The sulfur-containing substances discharged mainly include sulfide, sulfate and organic sulfur in flue gas. [0003] SO 2 It is a colorless gas with a strong pungent smell, easily soluble in human blood and other viscous fluids. SO in the atmosphere 2 It can cause human inflammation, bronchitis, emphyse...

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Problems solved by technology

[0004] In order to overcome the disadvantages of cumbersome process, high processing cost and incomplete desulfurization effect in the desulfurization device used in the existing cement plant, the present invention provides a kind of SO 2 Sulfur fixation treatment, and residual SO after calcination of cement raw materials 2 , SO in exhaust gas produced by calcining fuel 2 For desulfurization treatment, the prepared sulfur-fixing agent includes a variety of transition metal catalysts and mineralizers, which integrate catalytic reaction, multi-phase solid solution of substances, and multi-component mineralization to reduce the activation energy of the reaction. The stage of calcination of cement raw materials , effectively improving the efficiency of calcining sulfur fixation and the stability of the sulfate solid solution of the calcined product, and the solid solution formed becomes the component of the calcined cement clinker, which has an important role in promoting the growth of alite and belite in the calcined cement raw material into clinker The effect is to reduce the cost of desulfurization and improve the quality of cement. After the cement raw material is calcined, the residual SO discharged into the flue 2 , SO in exhaust gas produced by calcining fuel 2 , after processing to generate CaSO 4 Become a component of calcined cement clinker, make waste utilization and reduce SO 2 Emissions of solid solution and CaSO 4 It can also improve the early strength of cement products, thereby achieving a sulfur dioxide desulfurization method with simple process, low desulfurization cost and thorough desulfurization effect

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