Evaluation of CSF Process Extractor Performance Improvement for Cresap Testing. Special Report.

摘要

The CSF extractor is a vertical pressure vessel 24inches in diameter and approximately 25feet tall. A shaft equipped with mixing turbines rotates inside the extractor vessel to provide an intimate contact between coal fines and solvent. The operating conditions within the vessel are 750exp 0 F,and 400psig. Among the numerous mechanical problems encountered in this unit,the following items represent the greatest obstacles to continuous operation:shaft packing failure;coke formation in the vapor zone of the extractor;and bearing failures. Methods for improving the operational life of the CSF Process extractor unit as installed in the Cresap Coal Liquefaction Pilot Plant have been evaluated. Both external bearings and internal bearings with improved wear characteristics were considered. The study resulted in the design of a preferred external bearing concept. A test program to evaluate and refine the external bearing concept was developed. (ERA citation 01:018484)