Method of decontaminating sulfur dioxide in smoke using honeycomb ceramic

Abstract

A process for removing SO2 from the fume in sinterting plane is characterized by use of the porous honeycomb ceramics as absorbing carrier whose pore surface adsorbing the lime milk as desulfurizing agent and the lime milk are dropped in for continuously supplement fresh lime milk. Its advantages are high desulfurizing rate up to more than 80%, and low cost.

Description

Technical field: [0001] The invention belongs to the field of metallurgy and environmental protection, and in particular relates to a sulfur dioxide desulfurization technology suitable for waste gas of sintering plants. Background technique: [0002] The sintering plant in the iron and steel enterprise is a source of air pollution, and the sulfur dioxide it emits is extremely harmful to the earth's ecosystem. According to relevant literature reports, a joint enterprise with an annual output of 3 million tons of steel in foreign countries will emit 2.2 kg of sulfur dioxide for every ton of crude steel produced, of which 1.5 kg of sulfur dioxide will be emitted from the production of one ton of screened sinter. Therefore, how to eliminate and reduce the emission of sulfur dioxide in the waste gas of the sintering plant is a major issue that domestic and foreign iron and steel enterprises and environmental protection departments have been concerned about for a long time and are...

AI Technical Summary

Problems solved by technology

These methods are effective in treating high concentrations of sulfur dioxide, so they have been widely used at home and abroad, but the effect is not ideal for treating waste gas from sintering plants with large flue gas volume and low concentration of sulfur dioxide

Moreover, the used equipment of these methods is huge, the investment is high, the floor area is large, and the technology is complicated.

The second is to adopt a clean production process, that is, to desulfurize fuel and other materials before combustion to reduce the sulfur content entering the combustion process. This will inevitably impose various restrictions on fuel, etc., which not only increases production costs, but also reduces the adaptability of raw materials. ability, and it is difficult to achieve the ideal purification effect

However, if this method is used in the sintering plant, even if the problem of secondary release of SO2 is overcome, sulfur will inevitably remain in the sintering ore. As a result, the desulfurization burden of the subsequent steel production process will be increased, and the production of high-purity steel will be affected. is difficult and therefore not advisable

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