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Enhanced reaction system and method for direct coal liquefaction
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A technology for direct coal liquefaction and reaction system, applied in chemical instruments and methods, preparation of liquid hydrocarbon mixtures, chemical/physical processes, etc. The effect of reducing the thickness of the liquid film, increasing the utilization efficiency, and increasing the mass transfer area
Inactive Publication Date: 2021-01-05
NANJING YANCHANG REACTION TECH RES INST CO LTD
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[0004] In view of this, the present invention proposes an enhanced reaction system and method for direct coal liquefaction, aiming to solve the problem that the existing emulsified bed reactor cannot fully react with the coal slurry in the direct coal liquefaction process, resulting in a decrease in the efficiency of the coal liquefaction reaction The problem
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Embodiment 1
[0056] Reactor type: the first reactor emulsified bed, the second reactor suspended bed.
[0057] Reactor temperature: 400°C for the first reactor and 330°C for the second reactor.
[0058] Reaction pressure: 2MPa for the first reactor and 4MPa for the second reactor.
[0059] Hydrogen oil ratio: 100 for the first emulsified bed reactor, 250 for the second emulsified bed reactor.
[0062] Sulfur addition amount: S / Fe=2 (molar ratio).
[0063] In this embodiment, the conversion rate of coal is 80.23%, the yield of oil contained in the product is 50.10%, and the hydrogen consumption is 9.18%.
Embodiment 2
[0065] Reactor type: first reactor suspension bed, second reactor ebullating bed.
[0066] Reactor temperature: 430°C for the first reactor and 290°C for the second reactor.
[0067] Reaction pressure: 8MPa for the first reactor and 7MPa for the second reactor.
[0068] Hydrogen oil ratio: 1000 for the first emulsified bed reactor and 500 for the second emulsified bed reactor.
[0071] Sulfur addition amount: S / Fe=2 (molar ratio).
[0072] In this example, the conversion rate of coal is 82.24%, the yield of oil contained in the product is 54.97%, and the hydrogen consumption is 8.03%.
Embodiment 3
[0074] Reactor type: first reactor ebullating bed, second reactor emulsified bed.
[0075] Reactor temperature: 460°C for the first reactor and 200°C for the second reactor.
[0076] Reaction pressure: 14MPa for the first reactor and 4MPa for the second reactor.
[0077] Hydrogen oil ratio: 2000 for the first emulsified bed reactor, 700 for the second emulsified bed reactor.
[0080] Sulfur addition amount: S / Fe=2 (molar ratio).
[0081] In this example, the conversion rate of coal is 87.36%, the yield of oil contained in the product is 60.56%, and the hydrogen consumption is 7.76%.
[0082] In view of this, the present invention proposes an enhanced reaction system and method for direct coal liquefaction, which solves the problem of low reaction efficiency in the process of direct coal liquefaction caused by the inabil...
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Abstract
The invention provides an enhanced reaction system and method for direct coalliquefaction. The system comprises a feeding unit which is used for preparing coalslurry and conveying the coalslurry and hydrogen; a liquefaction reaction unit which is connected with the feeding unit, is used as a place where the coal slurry and hydrogen are subjected to liquefaction reaction, and is used for separating and rectifying the liquefaction reaction product to obtain a light fraction and distillate oil; a hydrogenation reaction unit which is connected with the liquefaction reaction unit and is used forcarrying out catalytic hydrogenation reaction on the light fraction and the distillate oil to obtain a hydrogen-donating solvent and product oil; and micro-interface generators which are respectivelyarranged in the liquefaction reaction unit and between the liquefaction reaction unit and the hydrogenation reaction unit. According to the enhanced reaction system and method for direct coal liquefaction, the problem of low reaction efficiency in the direct coal liquefaction process due to the fact that hydrogen cannot fully react with coal slurry in the prior art is solved.
Description
technical field [0001] The invention relates to the technical field of direct coal liquefaction, in particular to an enhanced reaction system and method for direct coal liquefaction. Background technique [0002] Coal direct liquefaction technology refers to the process of direct conversion of coal to liquid products and a small amount of gas products through hydrogenation under the action of high temperature, high pressure, hydrogen, solvent and catalyst. The process of direct coal liquefaction usually includes four main parts: oil-coal slurry preparation, coal hydroliquefaction reaction, solid-liquid separation, and product upgrading, processing and utilization. Coal is crushed, dried, and ground into coal powder, and is prepared together with solvent and catalyst to make oil-coal slurry suitable for transportation and heat transfer. After boosting and preheating, the oil-coal slurry is transported to the coal hydrogenation liquefaction reactor. The lower coal undergoes p...
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