Desulfurizing technology and system with regenerable metal oxide as desulfurizing agent

Abstract

The present invention relates to regenerable metallic oxide sulfur removal technology and system, said system includes desulfurization part, regeneration part and by product treatment part. The desulfurizing agent is prepared by using regenerable metallic oxide active component as absorbent and assisted by catalyst, to remove SO2 in smoke in desulfurization reactor, the SO2 saturated desulfurizing agent is regenerated in regenerator to produce mixed gas containing high concentration SO2, SO3, which is then catalyzed, transferred and absorbed to obtain concentrated sulfuric acid by product with concentration higher than 92%. The sulfur removal efficiency can be higher than 88%, the sulfurizing agent can be cyclically reused, it is low in cost and has no secondary pollution.

Description

technical field [0001] The invention relates to a method for removing SO in flue gas 2 Gas renewable metal oxide desulfurization technology and system. Background technique [0002] SO contained in flue gas (gas) released by burning fossil fuels (coal, oil, natural gas, etc.) in energy, chemical, metallurgy, electronics and other industries 2 Cause serious pollution to the atmosphere, my country has become the world's largest SO 2 As the country with the largest emission and the third largest acid rain area, environmental issues have become a key issue for the sustainable development of my country's national economy. In recent years, the Chinese government has paid great attention to environmental issues. For example, my country's Environmental Protection Law has clearly stipulated that power plant boilers that burn coal with a sulfur content greater than 1% must be equipped with desulfurization facilities. [0003] In recent years, the practi...

AI Technical Summary

Problems solved by technology

traditional control SO 2 Emission methods mainly include wet flue gas desulfurization, rotary spray dry desulfurization, and furnace calcium spray desulfurization, etc. These methods have been successfully applied. For example, the commonly used desulfurization method is wet desulfurization, such as "Control method of gas wet method and desulfurization process" (patent No. 87102943) and "exhaust gas desulfurization method" (patent No. 87106325), etc., are wet desulfurization technologies, using quicklime and limestone as desulfurizers, and reacting with SO2 to form gypsum , because the quality of the gypsum produced is not high, and my country is a country rich in gypsum, so the by-products of desulfurization are difficult to reuse, and are generally used for landfill, resulting in secondary pollution. In addition, wet desulfurization technology also produces A large amount of waste water, leading to water pollution

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