METHOD FOR SIMULTANEOUS REMOVAL OF CO2, H2S AND HCN USING AMMONIA

• Main Authors: AHN, CHI KYU, KIM, JE YOUNG, HAN, KUN WOO
• Format: Patent
• Language: English; Korean
• Published: 08.07.2013
• Subjects: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; SEPARATION; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; TRANSPORTING

PURPOSE: A method of simultaneously removing carbon dioxide, hydrogen sulfide, and hydrogen cyanide is provided to prevent a pipe from being corroded due to hydrogen sulfide by removing the carbon dioxide, hydrogen sulfide, and hydrogen cyanide from an exhaust gas generated from an iron manufacturing process and a petrochemistry process. CONSTITUTION: A method of simultaneously removing carbon dioxide, hydrogen sulfide, and hydrogen cyanide includes the steps of: supplying an exhaust gas containing carbon dioxide, hydrogen sulfide, and hydrogen cyanide into the lower side of an absorbent tower (101); absorbing the carbon dioxide, hydrogen sulfide, and hydrogen cyanide from the exhaust gas by supplying ammonia water into the absorbent tower; collecting the carbon dioxide, hydrogen sulfide, and hydrogen cyanide in a vapor phase by supplying the ammonia water which absorbs the carbon dioxide, hydrogen sulfide, and hydrogen cyanide into a regenerating tower (201) and heating the ammonia water. The molar ratio of the ammonia water to the total mole number of the carbon dioxide, hydrogen sulfide, and hydrogen cyanide is 1:1-5.