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Preparation method of highly compatible oil-coal slurry

A preparation method and technology of oil-coal slurry, which are applied in the petroleum industry, liquid carbon-containing fuels, fuels, etc., can solve the problems of the synergistic effect of coal and heavy oil, coking and other problems, so as to reduce non-production load, slow down wear, and enhance solubility. Effect

Active Publication Date: 2021-08-13
CCTEG CHINA COAL RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, not all types of coal and heavy oil are suitable for kerosene co-refining technology, and there will be matching problems between coal and heavy oil
If the matching between coal and heavy oil is poor, stratification of coal and heavy oil will occur, and the oil-coal slurry will be deposited in the reactor, causing problems such as coking due to local overheating, and the synergistic effect of coal and heavy oil is also greatly affected

Method used

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  • Preparation method of highly compatible oil-coal slurry
  • Preparation method of highly compatible oil-coal slurry
  • Preparation method of highly compatible oil-coal slurry

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0076] Dry the washed 1# coal to a moisture content of 3.0%, then crush and grind it into coal powder below 0.074mm, mix the coal powder and 1# heavy oil at a mass ratio of 4:6, and add 1% (with coal and The total amount of heavy oil was used as the basis) Fe catalyst was stirred under a 120r / min stirring paddle for 45min, and part of the oil-coal slurry was taken out and left to stand at 90°C for 30min, and no coal dust particle sedimentation was found.

[0077] The oil-coal slurry prepared by the above method has a viscosity of 673mPa·s (90°C). The oil-coal slurry is subjected to hydrogenation reaction. The properties of the oil-coal slurry and the results of the hydrogenation reaction in this embodiment are shown in Table 3.

Embodiment 2

[0079] The washed 2# coal and 3# coal are mixed according to the mass ratio of 5:5 and dried until the water content is 2.1%, and then crushed and ground into coal powder below 0.15mm.

[0080] The 3# heavy oil is pre-hydrogenated at a hydrogen partial pressure of 17 MPa and a temperature of 430°C, and the pre-hydrogenated 3# heavy oil is distilled to obtain a heavy distillate oil greater than 350°C.

[0081] Then the coal powder and 3# heavy oil pre-hydrogenated heavy distillate oil greater than 350°C were mixed in a ratio of 3:7, and 1% (based on the total amount of coal and heavy oil) Fe catalyst was added. Stir for 60 minutes at the same time, accompanied by the circulating flow of the pump, take out part of the oil-coal slurry and let it stand for 30 minutes at 90°C, no coal dust particles are found to settle.

[0082] The oil-coal slurry prepared by the above method has a viscosity of 648 mPa·s (90° C.), and the oil-coal slurry is subjected to hydrogenation reaction. The...

Embodiment 3

[0084] Dry the washed 4# coal until the water content is 3.5%, crush it and grind it into coal powder below 0.15mm, mix the coal powder with 2# heavy oil and 5# heavy oil in a ratio of 4:3:3, add 200mg / kg of Mo catalyst was stirred for 120min under a stirring paddle of 70r / min, accompanied by the circulating flow of the pump, and part of the oil-coal slurry was taken out and left to stand at 90°C for 30min, and no settling of pulverized coal particles was found.

[0085] The oil-coal slurry prepared by the above method has a viscosity of 975 mPa·s (90° C.), and the oil-coal slurry is subjected to hydrogenation reaction. The properties of the oil-coal slurry and the results of the hydrogenation reaction in this embodiment are shown in Table 3.

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Abstract

The invention proposes a preparation method of highly compatible oil-coal slurry, which includes the following steps: coal washing, crushing and drying, and grinding the dried coal into coal powder; mixing coal powder and heavy oil in a certain proportion; adding a catalyst , stirred to make oil-coal slurry; the coal meets the following requirements: volatile matter ≥ 37%; hydrogen-carbon atomic ratio ≥ 0.75; inertinite content ≤ 20%; vitrinite reflectance ≤ 0.65; The following requirements: ash content ≤ 1.0%; dynamic viscosity ≤ 1500mPa.s at 100°C; hydrogen-carbon atomic ratio of 0.7-1.70; aromaticity greater than 0.20. The oil-coal slurry prepared by this method has a high matching property, which can avoid the problem that the coal and heavy oil in the oil-coal slurry are separated and cause the oil-coal slurry to deposit in the preheater or reactor and cause coking due to local overheating. It can give full play to the synergy between coal and heavy oil, improve the conversion rate and oil yield of coal and heavy oil, and thus be more practical.

Description

technical field [0001] The invention belongs to the technical fields of petrochemical industry and coal chemical industry, and in particular relates to a preparation method of highly compatible oil-coal slurry. Background technique [0002] Kerosene co-refining technology is a process technology for producing clean fuel oil by co-hydrogenating coal and heavy oil. Its overall goal is to improve the quality of heavy oil while coal is liquefied. It is a hot research topic at present. In the process of kerosene co-refining, coal, heavy oil, catalyst, etc. must first be prepared into oil-coal slurry, and then pumped into the reactor for co-hydrogenation reaction. However, not all types of coal and heavy oil are suitable for kerosene co-refining technology, and there will be compatibility problems between coal and heavy oil. If the matching between coal and heavy oil is poor, the phenomenon of stratification between coal and heavy oil will occur, and the oil-coal slurry will be d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10L1/32
CPCC10L1/322C10L2290/24C10L2290/28
Inventor 颜丙峰王光耀李伟林李培霖赵渊谷小会刘敏石智杰
Owner CCTEG CHINA COAL RES INST
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