Dry desulfurization system for flue gas with high sulfur concentration

Abstract

The invention discloses a dry desulfurization system, particularly relates to a dry desulfurization system for high-sulfur concentration smoke, and belongs to the technical field of design and manufacture of chemical desulfurization equipment. The invention provides a dry desulfurization system for high-sulfur concentration smoke, which is low in production cost and capable of remarkably improving the desulfurization effect of the high-sulfur concentration smoke. The dry desulfurization system comprises at least three sets of desulfurization tower, and further comprises a desulfurized fly ash recycling device, wherein the smoke output end of the former set of desulfurization tower in all sets of desulfurization towers is connected with the smoke input end of the next adjacent set of desulfurization tower serially into a whole, the material input end of the desulfurized fly ash recycling device is connected with the desulfurized fly ash output ends of all sets of desulfurization towers, and the material output end of the desulfurized fly ash recycling device is connected with desulfurized fly ash input ends of all sets of desulfurization towers.

Description

technical field [0001] The invention relates to a dry desulfurization system, in particular to a dry desulfurization system for flue gas with high sulfur concentration, and belongs to the technical field of chemical desulfurization equipment design and manufacture. Background technique [0002] Reducing sulfur dioxide emissions is the focus of the "National Environmental Protection "Twelfth Five-Year" Plan", which requires the total amount of sulfur dioxide emissions to be reduced from 22.678 million tons in 2010 to 20.864 million tons in 2015. The reduction is 8%. It also clearly pointed out that "promote the total amount of sulfur dioxide emissions in the iron and steel industry, fully implement the flue gas desulfurization of sintering machines, and build desulfurization and denitrification facilities for new sintering machines." project". [0003] In recent years, with the development of the economy, good resources such as coal and ore have become less and less, and mo...

AI Technical Summary

Problems solved by technology

Aiming at the desulfurization of iron and steel sintering machines, various sintering flue gas desulfurization technologies have been developed successively. Among them, the wet desulfurization process represented by the limestone gypsum process is widely used, but this desulfurization method has low desulfurization efficiency and secondary generation of scrubbing flue gas. Polluted water leads to the problem of secondary pollution; dry semi-dry desulfurization technology represented by dense phase dry tower technology has high desulfurization efficiency for flue gas with low sulfur concentration, but it is basically not suitable for desulfurization of sintering flue gas with high sulfur concentration

For the desulfurization of flue gas with high sulfur concentration, several wet or dry desulfurization technologies currently used cannot meet the desulfurization effect requirements stipulated by the state

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