Comprehensive utilization process for synthesizing methanol from coke oven gas and co-producing liquefied natural gas

• Main Authors: MA GUOQIANG, FAN HUI, CUI XIAOXI, WU MAIGUI, DUAN XING, LIU HANG, LIU JIANWEI
• Format: Patent
• Language: Chinese; English
• Published: 13.06.2017
• Subjects: ACYCLIC OR CARBOCYCLIC COMPOUNDS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE ORUNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; CHEMISTRY; CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS; FIRELIGHTERS; FUELS; FUELS NOT OTHERWISE PROVIDED FOR; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; LIQUEFIED PETROLEUM GAS; LUBRICANTS; METALLURGY; NATURAL GAS; ORGANIC CHEMISTRY; PEAT; PETROLEUM, GAS OR COKE INDUSTRIES; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BYSUBCLASSES C10G, C10K; TECHNICAL GASES CONTAINING CARBON MONOXIDE; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE

The invention relates to a comprehensive utilization process for synthesizing methanol from coke oven gas and co-producing liquefied natural gas. The comprehensive utilization process comprises the following steps: performing dust removal, oil removal, desulphurization, decarbonization and dewatering for the coke oven gas, then separating methane by virtue of a deep cooling methane separation system, and adding carbon dioxide from a carbon trapping system into the coke oven gas separated from the deep cooling methane to perform primary methanol synthetic reaction and secondary methanol synthetic reaction. By virtue of the process, not only can the overall conversion and utilization efficiency of the coke oven gas be further improved, but also the emission reduction of the carbon dioxide can be actually realized, and a more feasible novel way can be provided for the comprehensive utilization of the coke oven gas. 本发明对焦炉煤气先经除尘、除油、脱硫、脱碳和脱水，然后经过深冷甲烷分离系统首先将甲烷分离出来，然后将来自碳捕集系统的二氧化碳添加至经深冷甲烷分离的焦炉煤气中进行第级甲醇合成反应和第二级甲醇合成反应