Method for preparing synthesis gas after pure oxygen catalytic partial oxidation of purge gas in methanol synthesis loop to increase yield of methanol and device

• Main Authors: LU HUANQING, YANG ZHENDONG, GONG TIANBAI, ZHANG HUAYONG, GU HEYAN
• Format: Patent
• Language: Chinese; English
• Published: 12.05.2010
• Subjects: ACYCLIC OR CARBOCYCLIC COMPOUNDS; BLASTING; CHEMISTRY; CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS; COMPOUNDS THEREOF; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; HEATING; INORGANIC CHEMISTRY; LIGHTING; MECHANICAL ENGINEERING; METALLURGY; NON-METALLIC ELEMENTS; ORGANIC CHEMISTRY; STEAM GENERATION; SUPERHEATING OF STEAM; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; WEAPONS

The invention discloses a method for preparing synthesis gas after pure oxygen catalytic partial oxidation of purge gas in the methanol synthesis loop to increase yield of methanol, which is characterized in that methane-containing gas is compressed by a synthesis gas compressor, is mixed with recycle gas which exits the methanol synthesis loop and separates the methanol and is compressed and preheated by a recycle compressor, and then the mixed gas enters the methanol synthesis loop to synthesize methanol; the methane-containing gas which exits the methanol synthesis loop is condensed into crude methanol liquid, thus being separated; the purge gas separating the methanol enters a hydrogen recovery device after being washed; and hydrogen rich gas and tail gas are obtained after recovery of the hydrogen recovery device, wherein the hydrogen rich gas returns to be mixed with the methane-containing gas and then enters the synthesis gas compressor or is output as a hydrogen product, and the tail gas is sent to a