Low rank pulverized coal pyrolysis oil extraction process
A pulverized coal and pyrolysis technology, applied in the petroleum industry, special forms of dry distillation, coke ovens, etc., can solve the problem of excessive tar residue, reduce the loss of tar, reduce the generation of dust, and improve the total yield. Effect
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Embodiment 1
[0018] First, to 100 parts of low-rank coal powder crushed to a particle size of less than 3mm, add 10 parts of 2% aqueous solution of sage powder and 15 parts of strong caking coal powder, which can be gas-fertilized coal, fat coal, coking coal or 1 / 3 coking coal powdered coal, and mix well.
[0019] Then, the aforementioned mixture is pressed into blocks on a briquetting device. After many tests, it can be seen that 15 parts of fat coal pulverized coal has the best effect on ensuring the thermal strength of low-rank pulverized coal compared with other strong caking coal pulverized coal, and the integrity of lump coal is the best, which can reduce the lumpiness to the greatest extent. Dust from coal heating.
[0020] Next, after the above-mentioned lump coal is dried, enter the pyrolysis furnace to isolate the air and raise the temperature to 550°C for 15 minutes, and condense and cool the generated volatiles to obtain gas phase gas, tar, water, oil residue mixture and soli...
Embodiment 2
[0024] Firstly, add 100 parts of low-rank coal powder, 12 parts of 1.2% aqueous solution of safflower powder, 11 parts of coking coal powder, and mix well.
[0025] Then, the aforementioned mixture is pressed into blocks on a briquetting device.
[0026] Next, after the above-mentioned lump coal is dried, enter the pyrolysis furnace to isolate the air and raise the temperature to 600°C for 10 minutes, and condense and cool the generated volatiles to obtain the gas phase gas, tar, water, oil residue mixture and solid semi coke, and after separation, tar, water and tar residue are obtained. After several tests, it is concluded that 600°C is the best pyrolysis temperature. If the temperature is too low, the pyrolysis and tar extraction will be insufficient. If the temperature is too high, energy will be wasted and dust will easily be generated.
[0027] Finally, the recovered tar residue is used as the binder component for the next briquetting, and is added to 100 parts of low-r...
Embodiment 3
[0029] First, add 100 parts of low-rank coal powder, 15 parts of 0.5% aqueous solution of sage powder, and 8 parts of gas fertilizer coal, and mix them evenly.
[0030] Then, the aforementioned mixture is pressed into blocks on a briquetting device.
[0031] Next, after the above lump coal is dried, it enters the pyrolysis furnace and heats up to 650°C for 5 minutes in isolation from the air, and condenses and cools the generated volatiles to obtain gas phase gas, tar, water, oil residue mixture and solid semi-coke . The mixture of tar, water and oil residue can be separated to obtain tar, tar residue and pyrolysis water.
[0032] Finally, tar slag is recovered as the binder component for the next briquetting, and added to the low-rank coal powder, the quantity is not limited, together with the water solution of safflower powder to ensure the cold strength of the lump coal, and at the same time, it enters with the lump coal In the pyrolysis link, the tar is refined and recov...
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