초록 ▼

A method for removing acid gases, particularly the sulfur oxides and hydrochloric acid from a hot flue gas without substantially cooling or humidifying the latter consists in withdrawing a small stream of the flue gas, preferably the purified gas, and introducing it into a stream of humid gas consis

A method for removing acid gases, particularly the sulfur oxides and hydrochloric acid from a hot flue gas without substantially cooling or humidifying the latter consists in withdrawing a small stream of the flue gas, preferably the purified gas, and introducing it into a stream of humid gas consisting of steam and/or humid air containing dispersed therein a finely-divided, porous, alkaline earth metal hydroxide upon which surface is adsorbed at least a monomolecular layer of water, and thereby reacting carbon dioxide in the withdrawn portion of the flue gas with the pore surfaces of the hydroxide to form an alkaline earth metal carbonate thereon. The so-formed reactant in the humid gas is then brought into contact with the main flow of hot flue gas, thereby removing acid gases from the flue gas, the solid reaction products and excess reactant thereafter being separated from the flue gas in a baghouse or electrostatic precipitator, and the so-treated flue gas being discharged to the atmosphere.

대표청구항 ▼

A method for the removal of sulfur oxide gases from a flue gas containing the same the said method comprising: dispersing finely-divided dry hydrated lime in a humid inert gas having a relative water vapor pressure higher than the fugacity of a least a monomolecular layer of water thereby adsorbed o

A method for the removal of sulfur oxide gases from a flue gas containing the same the said method comprising: dispersing finely-divided dry hydrated lime in a humid inert gas having a relative water vapor pressure higher than the fugacity of a least a monomolecular layer of water thereby adsorbed on the hydrated lime; bringing the dispersed hydrated lime and adsorbed water into contact with gaseous carbon dioxide thereby converting surfaces of the lime to calcium carbonate; flowing the dispersion of so-carbonated lime into admixture and reactive contact with the said flue gas to form calcium sulfite and sulfates from sulfur oxides in the flue gas; subsequently removing solids including reacted calcium sulfite and sulfate and excess reactants from the so-treated flue gas and discharging so-purified flue gas to the atmosphere.