Coal and oil coprocessing method and device

A technology of co-refining and kerosene, applied in the petroleum industry, processing hydrocarbon oil, hydrotreating process, etc., can solve the problems of reducing coal processing capacity, reducing equipment utilization, affecting the properties of oil-coal slurry, etc., to avoid Effect of secondary cracking and improvement of hydrogen supply capacity

Active Publication Date: 2017-02-22
CCTEG CHINA COAL RES INST
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Problems solved by technology

[0004] Although the above-mentioned kerosene co-refining technology realizes the co-processing of coal and heavy oil, the properties of heavy oil have a great influence on the co-processing results of kerosene: First, the properties of heavy oil directly affect the properties of the oil-coal slurry
In the direct liquefaction of coal alone, the viscosity of the oil-coal slurry is generally required to be 50-500mPa.s (80°C), while the viscosity of the residual oil itself is already very high (refer to the typical data in Table 1). When preparing oil-coal slurry, on the one hand, the proportion of coal powder in the oil-coal slurry will be greatly reduced. Usually, the content of coal powder in the oil-coal slurry can only be controlled at 30%-40%, thereby reducing the coal liquefaction equipment. The ability to process coal reduces the utilization rate of equipment; on the other hand, it will greatly increase the viscosity of oil-coal slurry. This high-viscosity oil-coal slurry is not conducive to pump transportation, and the heat and mass transfer effects are poor.
Second, the hydrogen supply capacity of heavy oil will directly affect the liquefaction effect of coal
In the prior art, the viscosity of heavy oil is mainly reduced by thermal cracking, but the thermal cracking temperature is relatively high, generally at 450-480°C, heavy oil is prone to coking, which reduces the overall oil yield, and does not involve How to Improve the Hydrogen Supply Capacity of Heavy Oil

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Examples

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Embodiment 1

[0049] This embodiment provides a kerosene co-refining device and a co-refining method thereof.

[0050] The oil component in this example is vacuum residue, and its properties are shown in Table 1; the coal component in this example is low-priced bituminous coal in Xinjiang, and its properties are shown in Table 2.

[0051] Bituminous coal pretreatment: The coal is crushed to below 200 mesh, and then dried to reduce its moisture content to <1%.

[0052] Slurry pretreatment: first, carry out separate autoclave hydrogenation of the vacuum residue, the addition of vacuum residue is 45g, the addition of Fe-based catalyst is 0.7%, hydrogenation is carried out at an initial hydrogen pressure of 7Mpa and a reaction temperature of 420°C. Hydrogen reaction, reaction time 1h, 43.2g of liquid phase product was obtained, the liquid phase product was subjected to distillation and cutting, and 37.3g of >350°C fraction product was obtained.

[0053] Co-refining of kerosene: make a 40% oil-...

Embodiment 2

[0056] This embodiment provides a kerosene co-refining device and a co-refining method thereof. The kerosene co-refining device provided in this embodiment is as figure 1 shown.

[0057] The oil component in this example is vacuum residue, and its properties are shown in Table 1; the coal component in this example is low-priced bituminous coal in Xinjiang, and its properties are shown in Table 2.

[0058] The coal is crushed to less than 3mm by a crusher, then dried to reduce its moisture content to less than 3%, and then ground to less than 100 mesh by a ball mill for use. In the heavy oil pretreatment process, the reaction temperature is 410°C, the reaction pressure is 16MPa, the gas-liquid ratio is 1000, the feed rate of atmospheric residual oil is 8kg / h, and the catalyst addition amount is 1%. After hydrotreating, it is obtained The light distillate oil is 2.8kg / h, and the heavy distillate oil is 5.6kg / h. Heavy distillate oil and coal powder were prepared into oil-coal ...

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Abstract

The invention relates to a coal and oil coprocessing method and device. The coprocessing method comprises steps as follows: step one, oil slurry pretreatment: heavy oil, a non-hydrogenated cycling solvent and a first catalyst are mixed, oil slurry is prepared and subjected to first hydrocracking reaction, a first product is obtained and separated, and first light distillate oil and first heavy distillate oil are obtained; step two, coal and oil coprocessing, solvent oil circulation and finished product separation. The coprocessing device comprises an oil slurry pretreatment device, a coal and oil coprocessing device body, a solvent oil circulating device and an oil product quality improving device. According to the coal and oil coprocessing method and device, selectivity for the heavy oil during coal and oil coprocessing is reduced, the percentage amount of pulverized coal in a coal and oil coprocessing process is increased, and the coal and oil coprocessing method and device are more suitable for practical application.

Description

technical field [0001] The present invention relates to a co-processing method of coal and heavy oil, specifically, the present invention combines the direct liquefaction process of coal with the hydrocracking process of heavy oil, so as to realize the production of coal and heavy oil in the same set of equipment Clean oil. Background technique [0002] In 2015, China's crude oil processing volume reached 522 million tons, and the net import volume was 334 million tons. The dependence on foreign crude oil was as high as 64%. . China has abundant low-metamorphic coal resources, these low-metamorphic coals have high reactivity, and coal can be converted into clean vehicle fuel through direct coal liquefaction technology, which is an important way to effectively alleviate the contradiction between my country's oil supply and demand. At present, except China , the United States, Germany, Japan, etc. have developed their own direct coal liquefaction technology. However, the dir...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G67/00
CPCC10G67/00
Inventor 颜丙峰张晓静钟金龙王光耀王学云王勇杜淑凤李培霖毛学锋黄澎赵鹏
Owner CCTEG CHINA COAL RES INST
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