초록 ▼

A catalytic polyvalent metal redox solution can be recovered and re-used in a catalytic polyvalent metal redox solution H2S-removal, sulfur production process by interposing a closed loop evaporator/condenser process and apparatus in the sulfur washing/filtering/recovery process and apparatus so tha

A catalytic polyvalent metal redox solution can be recovered and re-used in a catalytic polyvalent metal redox solution H2S-removal, sulfur production process by interposing a closed loop evaporator/condenser process and apparatus in the sulfur washing/filtering/recovery process and apparatus so that wash water used to purify the sulfur, and any polyvalent metal redox solution recovered from the sulfur melter are fed to an evaporator to concentrate the redox solution to a concentration capable of effective absorption of H2S, and the water evaporated in the evaporator is condensed as pure water for use in washing and/or filtering the recovered sulfur.

대표청구항 ▼

In a process for removing H2S and recovering sulfur from an H2S-containing process gas wherein the sulfur is melting in a sulfur melting device for separation of sulfur from water including: intimately contacting the process gas with an aqueous polyvalent metal redox solution to absorb the H2S into

In a process for removing H2S and recovering sulfur from an H2S-containing process gas wherein the sulfur is melting in a sulfur melting device for separation of sulfur from water including: intimately contacting the process gas with an aqueous polyvalent metal redox solution to absorb the H2S into the polyvalent metal redox solution, while simultaneously forming a reduced polyvalent metal redox solution, and subsequently oxidizing the reduced polyvalent metal redox solution sufficiently to regenerate the polyvalent metal redox solution, to form an oxygenated polyvalent metal redox solution capable of again absorbing H2S from said process gas, and to convert dissolved H2S to elemental sulfur, including the steps of: separating the elemental sulfur from a majority of the polyvalent metal redox solution; and washing the polyvalent metal redox solution from the sulfur with wash water; the improvement comprising: recovering the wash water and polyvalent metal redox solution removed from the sulfur for recycle to the process; introducing the recovered wash water and the polyvalent metal redox solution removed from the sulfur to an evaporator, to evaporate sufficient wash water therefrom such that the polyvalent metal redox solution remaining in the evaporator is sufficiently concentrated for further absorption of H2S from the process gas, and removing the evaporated water from the evaporator; condensing the evaporated water removed from the evaporator as pure condensed water; using the pure condensed water as said wash water for washing the elemental sulfur; recovering the polyvalent metal redox solution from the evaporator; and recycling the recovered polyvalent metal redox solution for further absorption of H2S from the process gas.