A method for treating coal tar containing a large amount of solid components
A technology of solid composition and treatment method, applied in the field of coal tar sludge as a by-product, can solve the problem that coal tar cannot be used as a fuel, etc., and achieve the effect of improving the utilization rate
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Embodiment 1
[0056] At room temperature, 40 parts by weight of a 10% sulfuric acid solution was stirred and mixed to 100 parts by weight of a coal tar distillation fraction containing 28 weight percent of methylnaphthalene and 1.3 weight percent of quinoline to prepare a mixture. The prepared mixture was liquid-separated and separated into an upper neutral fraction layer and a lower water layer from which a tar salt component was removed. The quinoline content in the neutral fraction was 0.02% by weight.
[0057] Add caustic soda equivalent to the equivalent of sulfuric acid to the water layer in the lower layer, stir and mix, and then separate into a fraction layer containing a tar salt component and an aqueous layer in which sodium sulfate is dissolved.
[0058] To 100 parts by weight of raw material coal tar containing 25% solid content, 100 parts by weight of the neutral fraction was stirred and mixed for 30 minutes at a temperature of 80° C. to prepare a mixture. The prepared mixture...
Embodiment 2
[0062] To 100 parts by weight of raw coal tar containing 18% solid content, 100 parts by weight of the neutral fraction prepared in the same manner as in Example 1 was stirred and mixed for 30 minutes at a temperature of 150° C. to prepare a mixture.
[0063] Put the prepared mixture into the temperature of 150 ℃, 5kg / cm 2 Place the settler in a pressure nitrogen atmosphere and let stand for 2 hours. The supernatant was separated at a fraction of 70% by volume relative to the fraction charged to the static settler.
[0064] at 0.1kg / cm 2 Under the conditions of pressure and temperature of 240°C, the separated supernatant was distilled under reduced pressure to separate the neutral fraction and recover the coal tar.
[0065] The coal tar recovers 60% of the raw coal tar, and the solid content in the coal tar is 3%. At a temperature of 80° C., the viscosity of the coal tar sludge in the lower layer of the static settler is 310 cP, and the content of quinoline is 0.06 percent ...
Embodiment 3
[0067] To 100 parts by weight of raw coal tar containing 25% solid content, 50 parts by weight of the neutral fraction prepared in the same manner as in Example 1 was stirred and mixed for 30 minutes at a temperature of 80° C. to prepare a mixture.
[0068] The prepared mixture was put into the first centrifuge and maintained at a centrifugal force of 3000G-force for 10 minutes. At a temperature of 80° C., the viscosity of the coal tar sludge in the lower layer of the first centrifugal separator is 330 cP.
[0069] At a temperature of 80° C., into 100 parts by weight of the lower layer coal tar sludge of the first centrifuge, 50 parts by weight of the neutral fraction prepared in the same manner as in Example 1 were stirred and mixed for 30 minutes to prepare a mixture .
[0070] The prepared mixture was put into the second centrifuge and maintained at a centrifugal force of 3000G-force for 10 minutes. At a temperature of 80° C., the viscosity of the coal tar sludge in the l...
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