Solvent Refined Coal (SRC) Process. Flashing of SRC-II Slurry in the Vacuum Column on Process Development Unit P-99: Supplementary Experiments While Processing Ireland Mine Coal. Interim Report, September-December 1980

摘要

The results of twelve tests on the vacuum flash system of Process Development Unit P-99 performed during SRC-II processing of an 11% ash Ireland Mine Coal are discussed. The objective of this work was to obtain vacuum flash separation data at well-defined flash zone pressures on slurry produced from Ireland Mine coal in order to supplement 12 earlier experiments on this coal in which problems arose in the measurement of pressures in the vacuum column. The 900 exp 0 F distillate content of the vacuum bottoms and the percent of feed slurry flashed overhead correlated well with flash zone operating conditions. The data for the 11% ash Ireland Mine coal were very similar to those for the Powhatan No. 6 Mine coal. Data for the Powhatan No. 5 Mine (9% ash) and the previous shipment of Ireland Mine (16% ash) coals were quite different compared to results for the other coals due to different levels of ash in these coals and, hence, significantly different vacuum column feed slurry compositions. Polymerization and cracking appeared to be negligible. Specific gravity and melting point of the products correlated well with vacuum column operating conditions. Elemental, distillation, and solvent balances showed the data to be of reasonably good quality. (ERA citation 07:020649)