A direct coal liquefaction process using inferior oil

A technology for direct liquefaction of coal and low-quality oil, applied in the petroleum industry, hydrotreating process, processing of hydrocarbon oil, etc. The effect of reducing and increasing the conversion rate and increasing the cetane number

Active Publication Date: 2016-08-10
任相坤
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is that the production efficiency of the two-stage hydrogenated coal direct liquefaction process in the prior art is very low, and those skilled in the art have not been able to find the reason for the low production efficiency of the process; Coal direct liquefaction process using inferior oil

Method used

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  • A direct coal liquefaction process using inferior oil
  • A direct coal liquefaction process using inferior oil
  • A direct coal liquefaction process using inferior oil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Purify the naphthenic acid heavy oil by dehydrating and removing impurities in the purification treatment equipment. The water content of the dehydrated naphthenic acid heavy oil is less than 0.5wt%; the purified naphthenic acid heavy oil is subjected to atmospheric distillation , cut into light oil fractions 230°C;

[0029](2) Bituminous coal pulverized coal and heavy oil fraction > 230°C are mixed to form an oil-coal slurry with a coal powder content of 30wt%, and 0.03wt% iron sulfide catalyst is mixed into the oil-coal slurry, and then sent together with hydrogen into 10L of first-order reaction In-vessel reaction, the reaction pressure is 15MPa, the hydrogen partial pressure is 10MPa, the reaction temperature is 420°C, and the volume space velocity is 0.25h -1 , the reaction is completed to obtain a first-order reaction product;

[0030] (3) The primary reaction product is sent to the upper part of the 8L secondary reactor, the gas phase components in the prima...

Embodiment 2

[0032] (1) In the purification treatment equipment, the high heavy metal residue oil is dehydrated and purified, and the water content of the high heavy metal residue oil after dehydration is less than 0.5wt%; the high heavy metal residue oil after purification is subjected to atmospheric distillation , cut into light oil fractions 230°C;

[0033] (2) Bituminous coal powder and anthracite coal powder with a weight ratio of 1:1 are mixed with heavy oil fractions >230°C to form an oil-coal slurry with a total coal powder content of 50wt%, and 5wt% ZnCl is mixed into the oil-coal slurry 2 / S catalyst (where ZnCl 2 It is an active component, S is an auxiliary agent, and the atomic ratio of S and Zn is 0.5), and then sent together with hydrogen into a 10L primary reactor for reaction, the reaction pressure is 20MPa, the hydrogen partial pressure is 15MPa, and the reaction temperature is 460°C , the volume space velocity is 0.25h -1 , the reaction is completed to obtain a first-or...

Embodiment 3

[0037] (1) Purify the high heavy metal fuel oil by dehydration and impurity removal in the purification treatment equipment, the water content of the high heavy metal fuel oil after dehydration is less than 0.5wt%; the high heavy metal fuel oil after the purification treatment is subjected to atmospheric distillation , cut into light oil fractions 230°C;

[0038] (2) Mix sub-bituminous coal powder and heavy oil fraction >230°C to form an oil-coal slurry with a coal powder content of 40wt%, and mix 2wt% iron-molybdenum metal catalyst into the oil-coal slurry (the atomic ratio of iron and molybdenum is 50), hydrogen, heated to 100°C and mixed together from the bottom into a 10L primary reactor for reaction, the reaction pressure is 18MPa, the hydrogen partial pressure is 14MPa, the reaction temperature is 440°C, and the space velocity is 0.25h -1 , the reaction is completed to obtain a first-order reaction product;

[0039] (3) The primary reaction product is sent to the upper ...

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Abstract

The invention discloses a direct coal liquefaction process using inferior oil. The process comprises the following steps: carrying out purification treatment on inferior oil, carrying out vacuum distillation or atmospheric distillation on the inferior oil subjected to purification treatment, and cutting the factions into light oil fractions at a temperature lower than 230 DEG C and heavy oil fractions at a temperature higher than 230 DEG C; subjecting a coal oil mixture obtained by mixing pulverized coal with the heavy oil fractions at a temperature higher than 230 DEG C, hydrogen and a catalyst to reaction in a primary reactor at a reaction temperature of 420-460 DEG C, sending a primary reaction product to the upper part of a secondary reactor, enabling a gas phase component in the primary reaction product to flow out from the top of the secondary reactor, enabling solid and liquid components in the primary reaction product to flow down in the secondary reactor to carry out countercurrent contact reaction with hydrogen flowing up at a reaction temperature of 430-480 DEG C, and carrying out fractional distillation after the reaction ends. The process has the effects of obviously improving the production efficiency of direct coal liquefaction and improving the quality of naphtha and diesel products, and is suitable for the large-scale direct coal liquefaction industry.

Description

technical field [0001] The invention relates to a process for directly liquefying low-quality oil mixed with coal, and belongs to the technical field of direct coal liquefaction. Background technique [0002] Coal direct liquefaction is a technology that directly converts coal into liquid fuel through catalytic hydrogenation under high temperature and high pressure. At present, a variety of coal direct liquefaction processes have been successfully developed in the world, including the German IGOR process, the American H-Coal process, and the Japanese NEDOL process. and China Shenhua Craft. Among them, China Shenhua Technology built a 6,000-ton / day industrial demonstration device in 2008 and put it into use. [0003] Through long-term research, it has been found that in the direct liquefaction of coal, a large amount of pre-asphaltenes, asphaltenes and some small molecular hydrocarbons, CO 2 , CO and other gases, and then the pre-asphaltene and asphaltene will continue to b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G1/06C10G67/00C10G67/02
CPCC10G1/06C10G67/02
Inventor 井口宪二坂脇弘二
Owner 任相坤
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