Vacuum distillation unit schematics

A schematic of the EDS process is shown in Fig. 17.27. The coal is ground and mixed with a hydrogenated distillate recycle solvent before entering the liquefaction reactor. Hydrogen is added to the slurry in a tubular thermal reactor, which operated at 800 to 880"F (425-470"C) and 1500 to 2000 psig (10-14 MPa). The total reactor product is set to a distillation unit, where it is separated into gas, naphtha, distillates, and a vacuum... 

Figure 17.28 shows a schematic of the SRC-I process. The feed coal is crushed and mixed with a recycle solvent and hydrogen prior to entering the preheater. The preheater effluent, at 700 to 750°F (370-400°C), then is fed to the dissolver unit, or thermal liquefaction unit (TLU), which operates at 840 to 870°F (450-465°C). There is no upgrading step, as the desired product is a solid at room temperature and not a distillate. The solids removal from the liquid slurry is accomplished by critical solvent de-ashing (CSD). The solids-free resid from the CSD was separated by vacuum distillation into a recycle solvent (the light fraction) and a solvent refined coal product (the bottoms). 

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