Method for comprehensively utilizing and recycling vented waste gas of carbon dioxide rectifying tower as instrument air

• Main Authors: CHEN BAIWEN, CHEN HONGMOU, TAN GUOYONG, HUANG FEIFAN, LI YONGSHENG, FAN YUANZHEN
• Format: Patent
• Language: Chinese; English
• Published: 04.04.2023
• Subjects: BLASTING; CHEMISTRY; COMPOUNDS THEREOF; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED,LIQUEFIED, OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; HEATING; INORGANIC CHEMISTRY; LIGHTING; MECHANICAL ENGINEERING; METALLURGY; NON-METALLIC ELEMENTS; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; SEPARATION; STORING OF DISTRIBUTING GASES OR LIQUIDS; TRANSPORTING; VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED ORSOLIDIFIED GASES; WEAPONS

The invention discloses a method for comprehensively utilizing and recycling exhaust gas discharged from a carbon dioxide rectifying tower as instrument air, an emptying pipeline at the top of the carbon dioxide rectifying tower is connected with a recycling pipeline which is communicated with an instrument air header pipe, a pressure reducing device and a valve are arranged on the recycling pipeline, and the discharged gas is fed into the instrument air header pipe after being subjected to pressure reduction. The carbon dioxide waste gas emptied by the carbon dioxide rectifying tower is dry and clean and meets the requirement of instrument air, so that the carbon dioxide waste gas emptied by the carbon dioxide rectifying tower is recycled to replace dry air to be used as the instrument air, the carbon dioxide waste gas is directly discharged into the atmosphere, and meanwhile, the energy consumption of the dry air instrument air can be reduced. 本发明公开了一种综合利用二氧化碳精馏塔放空废气回收做仪表风的方法，在二氧化碳精馏塔顶部的放空管道连接一回收管路，与仪表风总管连通