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A method of coal processing to prepare fuel oil raw materials

A technology of raw materials and fuel oil, which is applied in the field of coal pyrolysis technology, can solve the problems of limited protective agent effect, and achieve the effects of good thermal stability and high coal tar yield

Active Publication Date: 2017-03-15
宁夏地理标志产业发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Patent CN1147575C invented a method for producing diesel oil from coal tar. Through the catalyst loading scheme of two-stage gradation or three-stage gradation, protective agent, hydrofining catalyst and dearomatization catalyst are added to the reaction system, and a certain effect is achieved. However, the protective agent has a limited effect and cannot maximize the efficiency of the hydrogenation reaction

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Select Inner Mongolia lignite and put it into an externally heated rotary furnace until the amount of raw coal accounts for 1 / 5 of the total volume of the furnace body. The furnace body of the rotary furnace includes two layers of outer wall and inner wall, and then the Circulating gas is fed into the space between them to pyrolyze the coal in the furnace body; the temperature is controlled by controlling the amount of circulating gas; firstly, the raw coal and composite catalyst are selected and put into a continuous external heating rotary furnace. The furnace body of the above-mentioned rotary furnace includes two layers of outer wall and inner wall, and then the circulating gas is introduced into the space between the outer wall and the inner wall, and the temperature is controlled by controlling the amount of the circulating gas, so that the temperature rises to 330°C , the coal seam was reacted for 6 minutes, and the temperature was adjusted to 780°C for 6 minutes;...

Embodiment 2

[0034] Select lignite and put it into an externally heated rotary furnace until the amount of raw coal accounts for 1 / 5 of the total volume of the furnace body. The furnace body of the rotary furnace includes two layers of outer wall and inner wall, and then the The circulating gas is fed into the space to pyrolyze the coal in the furnace body; the temperature is controlled by controlling the amount of the circulating gas; firstly, the raw coal and the composite catalyst are selected and put into a continuous external heating rotary furnace. The furnace body of the rotary furnace includes two layers of outer wall and inner wall, and then circulating gas is introduced into the space between the outer wall and the inner wall, and the temperature is controlled by controlling the amount of circulating gas, so that the temperature rises to 340°C. The coal seam was reacted for 8 minutes, and the temperature was adjusted to 850°C for 8 minutes; the temperature was adjusted to 560°C; a...

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Abstract

The invention discloses a method of preparing fuel oil material by coal processing. The method includes the steps of charging raw coal and a composite catalyst into a continuous externally heated rotary kiln a body of which comprises an outer wall and an inner wall, introducing circulating coal gas into space between the outer wall and the inner wall, controlling and setting the temperature to 300 to 360 DEG C by controlling introduction of the circulating coal gas, allowing reaction with a coal seam under normal pressure for 5 to 8 min, adjusting the temperature to 700 to 850 DEG C, and holding the temperature for 3 to 8 min; adjusting the temperature to 480 to 560 DEG C, and in this phase, adding pretreated carbon nanotubes accounting for 0.1% to 2% of the weight of the raw coal; allowing the coal seam to pyrolytic reaction at such temperature, collecting a pyrolysis product after the reaction, and separating coal tar and hydrogen. The method has the advantages the variable heating speed is used and the yield of coal tar is high.

Description

technical field [0001] The invention relates to a coal processing technology, in particular to a coal pyrolysis technology. Background technique [0002] The pyrolysis of coal is a complex process in which coal is heated under the condition of isolation of air, and a series of physical changes and chemical reactions occur in coal at different temperatures. The main products are gas, tar, crude benzene and coke or semi-coke. According to the difference of the final heating temperature, it can be divided into: low temperature (500-700 ℃), medium temperature (700-1000 ℃) and high temperature (1000-1200 ℃) pyrolysis. [0003] Compared with the coal liquefaction and gasification process, its processing conditions are mild, the investment is small, and the production cost is low. Coals suitable for low-temperature pyrolysis are generally low-rank coals, including lignite, long-flame coal, and non-caking coal with high volatile content. my country's low-rank coal reserves are rel...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G1/00C10C1/00
Inventor 李建树
Owner 宁夏地理标志产业发展有限公司