Thermal coupling rectification system for dichloromethane-trichloromethane production

• Main Authors: MA GUOJUN, ZHANG JINGQUN, LU GUOWEI, DONG XIN, RONG QINGJIN
• Format: Patent
• Language: Chinese; English
• Published: 15.08.2023
• Subjects: PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; SEPARATION; TRANSPORTING

The utility model relates to the technical field of methane chloride production, in particular to a thermal coupling rectification system for dichloromethane-trichloromethane production, which comprises a dichloromethane tower and a trichloromethane tower, the dichloromethane tower is a high-pressure tower, the trichloromethane tower is a low-pressure tower, a first reboiler is arranged at the bottom of the dichloromethane tower, and a second reboiler is arranged at the bottom of the trichloromethane tower. A second reboiler is arranged at the tower bottom of the trichloromethane tower; a heat source inlet and a heat source outlet of the second reboiler are respectively connected to a tower top gas phase outlet and a reflux inlet of the dichloromethane tower. By adjusting the tower top pressure of the dichloromethane tower and the trichloromethane tower, the tower top pressure of the dichloromethane tower is higher than that of the trichloromethane tower, a material discharged from a tower top outlet of the d