초록 ▼

A process for the removal of acidic gases from carrier gases employing a finely divided alkaline sorbent material is disclosed. The process includes, optionally, the step of conditioning the carrier gas to lower its temperature. The process comprises introducing a stream containing the alkaline sorb

A process for the removal of acidic gases from carrier gases employing a finely divided alkaline sorbent material is disclosed. The process includes, optionally, the step of conditioning the carrier gas to lower its temperature. The process comprises introducing a stream containing the alkaline sorbent material and mixing the alkaline sorbent material and the carrier gas, introducing a stream of vapor and liquid droplets and mixing the stream of vapor and liquid droplets with the stream of carrier gas containing the alkaline sorbent material. Thereafter a portion of the vapor is condensed and the alkaline sorbent material reacted with the acid gases to form products of reaction. Finally, the products of reaction and the remaining alkaline sorbent material are separated from the carrier gas stream. Preferably, the alkaline sorbent material is calcium based, e.g., calcium hydroxide or calcium carbonate and the vapor and liquid droplets comprise low pressure steam and water, respectively. The mixing process is facilitated by a free jet nozzle operated with a low pressure drop across the nozzle. The separation step may be formed in a fabric filter (baghouse) or an electrostatic precipitator.

대표청구항 ▼

A process for removal of acidic gases comprising gaseous sulfur dioxide, hydrogen sulfide, sulfurous acid, sulfuric acid, hydrogen chloride or nitrogen oxides from a first stream of carrier gas comprising providing a finely divided alkaline sorbent material, introducing said finely divided alkaline

A process for removal of acidic gases comprising gaseous sulfur dioxide, hydrogen sulfide, sulfurous acid, sulfuric acid, hydrogen chloride or nitrogen oxides from a first stream of carrier gas comprising providing a finely divided alkaline sorbent material, introducing said finely divided alkaline sorbent material into said first stream to form a second stream, passing said second stream through a first free jet nozzle to initiate mixing thereof, regulating the flow of said second stream through a mixing duct to provide further mixing, forming a third stream of vapor and liquid droplets, introducing said third stream into said second stream to form a fourth stream, regulating the flow of said fourth stream through a second free jet nozzle to mix said fourth stream and to condense at least a portion of said vapor, reacting at least a portion of said acidic gases with at least a portion of said finely divided alkaline sorbent material in a first reaction duct to form products of reaction and separating the remaining portion of said finely divided alkaline sorbent material and said products of reaction from said fourth stream.