Method for extracting heavy liquefied oil from residue of coal direct liquefaction, extracted heavy liquefied oil, and application thereof
A technology for heavy liquefied oil and coal liquefaction residue, which is applied in the field of deep coal processing, can solve the problems of low sedimentation separation efficiency, harsh extraction conditions, and high energy consumption of the device, and achieves improvement of overall economic benefits, solvent recovery rate, separation Efficient effect
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[0063]The basic test procedure is as follows:
[0064] This test selects a coal direct liquefaction residue produced on a 0.1t / d coal direct liquefaction device, and the properties of the residue are shown in Attached Table 1. First, use a jaw crusher to crush the residue to less than 2mm. Such as figure 1 As shown, 150Kg of crushed coal direct liquefaction residue powder 1 and 300Kg of extraction solvent 2 are added to the residue extraction device 3, and the extraction operation is carried out under the extraction conditions shown in Attached Table 2, and the extraction is carried out under the conditions of stirring and forced circulation , and then pump the extracted solid-liquid mixture into the cyclone separator 4 for solid-liquid separation to obtain 259.5Kg of the clear liquid phase mixture overflowing from the upper layer, with a solid phase concentration of 1.9%, which flows into the first storage tank 5, and then pressed into the precision Filtration device 6, fil...
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