Determining the drop point of residue at the bottom of decompression tower after coal liquefaction by automatic drop point determination technology (CAT#: STEM-PPA-0185-LJX)

Introduction

In the process of coal liquefaction production, solid and liquid are separated in the decompression tower, and the residue composed of unextracted residual oil, ash, unreacted pulverized coal and catalyst is discharged from the bottom of the decompression tower. The residue at the bottom of the decompression tower is similar to the asphalt produced in the petroleum refining process but is different from asphalt. Compared with asphalt, it increases unreacted pulverized coal, catalysts, minerals and gangue in coal, so the drop point is significantly higher than asphalt. The drop point data of residue is one of the important physical property data of direct coal liquefaction production, which is closely related to the process control of direct coal liquefaction.