Coal tar extracting and coal pyrolyzing method
A technology of coal tar and low-temperature coal tar, which is applied in the field of coal tar extraction-pyrolysis coal, and coal extraction pyrolysis solvent, can solve the problems of liquid product yield to be improved, scale to be expanded, and practical application, etc., to achieve utilization Extensive, cheap solvent sources, excellent properties
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Embodiment 1
[0049] 1) Raw coal pretreatment
[0050] The Shenfu long-flame coal was crushed and sieved by a pulverizer, and the particle size of the coal sample was less than 75 μm. Dry in a vacuum oven at 100±5°C for 6 hours, keep in a vacuum state and cool to room temperature, take it out and store it in a desiccator for later use.
[0051] 2) Solvent preparation
[0052] Distill the low-temperature coal tar in the distillation kettle, firstly remove the moisture in the coal tar, and collect the light distillate oil at 100-300°C as a solvent for later use;
[0053] 3) Extraction
[0054] Weigh 75g of coal sample and 227g of solvent, mix the two raw materials into the extraction tank, and use microwave to heat the mixture from room temperature to 200°C under normal pressure, and extract at constant temperature for about 30min; Cool and immediately drain the extraction mixture.
[0055] 4) Pyrolysis process
[0056] The extracted mixed product was pyrolyzed on an aluminum retort with...
Embodiment 2
[0058]The coal sample is the same as in Example 1, and the solvent is middle distillate oil at 180-360°C. Weigh 45g of coal sample and 180g of solvent into an extraction tank. Under normal pressure, use microwaves to heat the mixture from room temperature to 200°C, and extract at a constant temperature for about 30 minutes. After the extraction is completed, pour the extraction mixture into a centrifuge tube while it is hot. Carry out centrifugation to above-mentioned extraction mixture in centrifuge, centrifuge speed is 3800rps, and centrifugation time is 15min; 550°C, residence time 20min. The conversion rate of pulverized coal is 29.4%. After pyrolysis, the coke is powdery, non-caking, dark gray and dull.
Embodiment 3
[0060] The coal sample is the same as in Example 1, and the solvent is middle distillate oil. Weigh 45g of coal sample and 136g of solvent into a round-bottomed flask, heat the mixture electrically, and when the temperature reaches 200°C, transfer the material into an extraction tank, and keep microwave radiation at this temperature for 20 minutes; tank, and pour the material into an aluminum retort for pyrolysis, with a pyrolysis temperature of 510°C and a residence time of 20 minutes. The conversion rate of pulverized coal is 38.8%. After pyrolysis, the coke is powdery, non-caking, dark gray and dull.
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