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Deep processing method of non-caking coal or feebly caking coal

A technology of weakly caking coal and caking coal, applied in the field of coal chemical industry, can solve the problems of short operation period and not involving the utilization rate of coking heavy distillate oil

Inactive Publication Date: 2014-08-13
中铝能源有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method also does not involve the improvement of the utilization rate of coking heavy distillate oil, and the short operation period of the hydrocracking catalyst due to coking

Method used

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  • Deep processing method of non-caking coal or feebly caking coal
  • Deep processing method of non-caking coal or feebly caking coal
  • Deep processing method of non-caking coal or feebly caking coal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] Nanning lignite is sent to a fluidized bed carbonization reactor for carbonization reaction at a pressure of 0.1MPa and an operating temperature of 500°C to generate gas, coal tar and semi-coke. The properties of coal tar are shown in Table 1. After the gas is purified, it enters the pressure swing adsorption device, passes through the adsorption bed layer composed of zeolite molecular sieve, etc., and the operating pressure is 2MPa, and the hydrogen gas in it is extracted, and the carbon monoxide component in it is also reacted with water to generate Hydrogen is obtained, together with the hydrogen produced by coal dry distillation, the pressure swing adsorption technology is used to propose the feed for the coal tar hydrogenation unit. The semi-coke is sent to the fluidized bed gas generator, where it reacts with oxygen and water vapor to produce synthesis gas and coal ash. When the semi-coke is gasified, the semi-coke reacts with oxygen and water vapor (the volume r...

Embodiment 2

[0073] The Yilan coal is sent to a medium fluidized bed carbonization reactor for carbonization reaction, the pressure is 0.12MPa, and the operating temperature is 600°C to generate gas, coal tar and semi-coke. The properties of coal tar are shown in Table 2. After the gas is purified by dry distillation, it enters the pressure swing adsorption device, passes through the adsorption bed composed of silica gel, etc., and the operating pressure is 2.45MPa, and the hydrogen gas in it is extracted, and the carbon monoxide component in it is also reacted with water by medium-range technology Hydrogen is generated, and together with the hydrogen from coal dry distillation, the pressure swing adsorption technology is used to propose the feed for the coal tar hydrogenation unit. The semi-coke is sent to the fluidized bed gas generator, where it reacts with oxygen and water vapor to produce synthesis gas and coal ash. When the semi-coke is gasified, the semi-coke reacts with oxygen and...

Embodiment 3

[0078] Same as in Example 2, the reaction temperature in the hydrotreating section is 350°C, and a hydrogenation protecting agent is used for pretreatment before the hydrotreating section. The hydrogenation protecting agent is a conventional hydrogenation protecting agent, with alumina as the carrier, containing molybdenum oxide %, cobalt oxide 1%, the pore volume is 0.82mL / g, and the specific surface area is 128M 2 / g. The treatment conditions of the hydrogenation protective agent are reaction temperature 310°C, pressure 15.1MPa, hydrogen oil volume ratio 1200:1 and liquid hourly volume space velocity 1.2h -1 . Others are identical with embodiment 2.

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Abstract

The invention discloses a deep processing method of non-caking coal or feebly caking coal, which comprises the following steps: performing medium-and-low-temperature carbonization reaction on non-caking coal or feebly caking coal to generate coal gas, semicoke and coal tar; treating the coal tar as follows: inputting the coal tar material, oil gas obtained through delayed coking reaction and a hydrocracking liquid-phase product into a distillation tower, and distilling out naphtha fractions, carbolic-oil-containing fractions, wax oil fractions and tower bottom oil; mixing the naphtha fractions with hydrogen, and inputting into a naphtha hydrofining reaction section; dephenolizing the carbolic-oil-containing fractions to obtain dephenolized oil, mixing with the wax oil fractions, and inputting into a hydrotreating reaction section; fractionating the hydrotreating reaction liquid phase into light fractions and heavy fractions, and performing hydrocracking on the heavy fractions; and inputting the tower bottom oil obtained through distillation into a delayed coker. Compared with the prior art, the method disclosed by the invention performs sufficient deep processing on coal, improves the yield of light fuel oil produced from coal tar, and simultaneously prolongs the service life of a catalyst in a hydrogenation device.

Description

technical field [0001] The invention relates to a coal chemical process, in particular to a deep processing method of non-caking coal or weakly caking coal, and belongs to the field of coal chemical industry. Background technique [0002] The shortage of crude oil resources in the world is imminent, and the distribution is extremely uneven, while the coal reserves are very abundant, so using coal to produce vehicle fuel oil is a necessary way. The main technologies of coal-to-oil include direct liquefaction of coal and indirect liquefaction of coal, etc., but these technologies are costly and complicated. The other is coke production technology, which can produce coal tar by-product while producing coke. This is a widely used method at present. [0003] Non-caking coal or weakly caking coal includes lignite, long-flame coal and gas coal. Lignite is the coal with the lowest degree of coalification. It has high moisture, low specific gravity, high volatile content, non-cakin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G69/00C10G2/00C10B57/14C01B3/56C10J3/60C10J3/66
CPCY02P20/52
Inventor 许波王琰袁鹏
Owner 中铝能源有限公司
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