1, the spinnable coal tarp dryer - equipment overview

There are two main raw materials for the production of spinnable coal tar pitch. One is petroleum cracking, and the other is residual asphalt after coal tar processing. The processing method mainly comprises dissolving and diluting the crude asphalt with a solvent, performing hot filtration to remove solid impurities, and then performing hydrotreating and tempering modification, and then performing high temperature polymerization and vacuum distillation under vacuum to remove light bubbles which are easy to generate bubbles in the raw silk. The component, the steaming residue is the spinnable asphalt.

(I) pulverized coal preparation section: the raw coal is crushed to form a coal powder of 1 to 3 mm, and the crushed coal powder is dried to have a water content of < O. 1%;

(2) Spinning coal bitumen extraction section: pulverized coal is added from the upper part of the leaching extractor, and the organic solvent is introduced from the lower part of the leaching extractor, the weight ratio of the two is 3:4, and the temperature in the leaching extractor is 150. °C~200°C, pressure 2.0~2. 5MPa; the pulverized coal residue after extraction is discharged, and the extract enters the asphalt filtration section;

(3) Asphalt filter section: the extract is passed through a filtering device to filter out more than 98% of the solid particles having a diameter greater than 0.1 μm;

（4）The 5% of the solvent is less than O. 5%. The 5% of the solvent is less than O. 5%. The dried asphalt is followed by a bitumen; the solvent is recovered to the solvent tank;

(5) Hydrofining section: the fine pitch and the crude benzene are mixed at a weight ratio of 1:1 to form a suspension, and then hydrogen is introduced into the suspension, and the hydrogenation reaction is carried out by heating and pressurizing, wherein hydrogen and bituminous The weight ratio is I: 5, the reaction time is 6 to 8 hours, the reaction temperature is 330 to 340 ° C, and the pressure is 12. OMPa; the liquid asphalt after the reaction enters the high temperature separator to release the light component and the liquid in the liquid asphalt. The reacted hydrogen, the liquid asphalt separated at the bottom of the high-temperature separator, is thermally polymerized, and the polymerization time is about 4 hours. The polymerized asphalt enters the vacuum evaporation vessel, evaporates under vacuum, and the light component is quickly withdrawn from the top. From the bottom of the vacuum evaporating kettle is a spinnable coal pitch.