Method and system to prepare asphalt with coal liquefaction residue
A technology for preparing system and asphalt, which is applied in the processing of tar pitch/petroleum pitch/natural pitch, processing tar pitch/petroleum pitch/natural pitch by distillation, and processing tar pitch/petroleum pitch/natural pitch by selective extraction, etc. Solve the problems of loss of extractant, frequent filter cake removal, inability to seal operation, etc., to achieve high concentration of solid matter, improve extraction efficiency, and solve the effect of easy blockage
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Embodiment 1
[0060] Crush 200kg of coal liquefaction residue into residue powder with a particle diameter of less than 1cm, fully mix and stir with 500kg of tetrahydrofuran solvent in a mixed extraction tank at room temperature, and obtain a uniform mixture after stirring for 30 minutes, then perform primary coarse filtration, filter The temperature is normal temperature, the pore size of the filter cloth is 10um, and the filtration pressure is 0.2MPa. 2 Backflushing is carried out, and the powdered filter cake after backflushing is sent to a disk drying system with a drying temperature of 150° C. to obtain a dry raffinate without extractant.
[0061] The filtrate obtained from the first-level coarse filtration system enters the second-level precision filtration system. The filter mesh has a pore size of 1um and a filtration pressure of 0.4MPa. The small-sized solids on the filter are recoiled with an extractant, and the recoil pressure is 0.9MPa. The backwash liquid is sent to the primary...
Embodiment 2
[0065] Crush 100kg of coal liquefaction residue into residue powder with a particle diameter of less than 5mm, fully mix and stir with 600kg of coal liquefaction medium oil (distillation range 200-260°C) in a mixing extraction tank, and stir at 80°C for 100 minutes Finally, a uniform mixture is obtained, and then a primary coarse filtration is carried out. The filtration temperature is normal temperature, the filter cloth pore size is 5um, and the filtration pressure is 0.3MPa. Recoil with air, and the pulverized filter cake is sent to the disc drying system , the drying temperature of the disc drying device is 300°C, and the dry raffinate without extractant is obtained.
[0066] The filtrate obtained from the first-level coarse filtration system enters the second-level precision filtration system. The filter screen has a pore size of 1um and a filtration pressure of 0.5MPa. The small-sized solids on the filter screen are recoiled with an extractant, and the recoil pressure is ...
Embodiment 3
[0070] Crush 100kg of coal liquefaction residue into a residue powder with a particle diameter of less than 1cm, and mix it with 400kg of a mixed solvent. The types of mixed solvents are toluene, tetrahydrofuran, and petroleum ether. The liquefaction residue is fully mixed and stirred in the mixed extraction tank under normal temperature conditions, and a uniform mixture is obtained after stirring for 60 minutes, and then subjected to a primary coarse filtration, the filtration temperature is normal temperature, the filter cloth pore size is 5um, and the filtration pressure is 0.3MPa. 2 Backflushing is carried out, and the pulverized filter cake is sent to the disc drying system. The drying temperature of the disc drying device is 250° C. to obtain a dry raffinate without extractant.
[0071] The filtrate obtained from the first-level coarse filtration system enters the second-level precision filtration system. The filter mesh has a pore size of 0.5um and a filtration pressure ...
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