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Method and system for processing coal tar

A processing method, coal tar technology, applied in the petroleum industry, hydrogenation treatment process, hydrocarbon oil treatment, etc., can solve problems such as restricting the operation cycle of hydrogenation units, achieve improved production efficiency and economic benefits, low price, and remove high rate effect

Active Publication Date: 2015-06-03
GUANGHAN TIANZHOU AERO ENGINE FUEL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The high ash content will seriously restrict the operation cycle of the hydrogenation unit

Method used

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  • Method and system for processing coal tar
  • Method and system for processing coal tar
  • Method and system for processing coal tar

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] A kind of processing method of coal tar, comprises the following steps:

[0049] The first step: filter with a filter press to remove impurities with a diameter of 20-50 μm in the whole fraction of coal tar to obtain the first effluent;

[0050] The second step: mixing the first effluent with the diesel fraction at room temperature at a volume ratio of 1:0.1 to obtain a mixed oil;

[0051] Step 3: Use a filter press to filter and remove particles wrapped with impurities with a diameter of 1-20 μm in the mixed oil to obtain the second effluent.

[0052] The fourth step: hydrocracking the second effluent, the reaction conditions are: temperature 300°C, pressure 8MPa, space velocity 0.5, hydrogen oil volume ratio 500:1.

[0053] The diesel fraction in the second stage has an aromatics content of 6% and a paraffinic content of 45%.

Embodiment 2

[0056]A kind of processing method of coal tar, comprises the following steps:

[0057] The first step: filter with a filter press to remove impurities with a diameter of 20-50 μm in the whole fraction of coal tar to obtain the first effluent;

[0058] The second step: mixing the first effluent with the diesel fraction at room temperature at a volume ratio of 1:0.2 to obtain a mixed oil;

[0059] Step 3: Use a filter press to filter and remove particles wrapped with impurities with a diameter of 1-20 μm in the mixed oil to obtain the second effluent.

[0060] The fourth step: hydrocracking the second effluent, the reaction conditions are: temperature 350°C, pressure 10MPa, space velocity 1, hydrogen to oil volume ratio 800:1.

Embodiment 3

[0062] A kind of processing method of coal tar, comprises the following steps:

[0063] The first step: filter with a filter press to remove impurities with a diameter of 20-50 μm in the whole fraction of coal tar to obtain the first effluent;

[0064] The second step: mixing the first effluent with the diesel fraction at room temperature at a volume ratio of 1:1 to obtain a mixed oil;

[0065] Step 3: Use a filter press to filter and remove particles wrapped with impurities with a diameter of 1-20 μm in the mixed oil to obtain the second effluent.

[0066] The fourth step: hydrocracking the second effluent, the reaction conditions are: temperature 400°C, pressure 15MPa, space velocity 2, hydrogen to oil volume ratio 1100:1.

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Abstract

The invention provides a method and a system for processing coal tar. The method for processing the coal tar comprises the following steps: step A, filtering to remove impurities of which the diameter is 20 to 50 micrometers in total fractions of the coal tar by using a press filter to obtain a first flow-out substance; step B, mixing the first flow-out substance with diesel fractions at a volume ratio of 1 to (0.1-5) to obtain mixed oil; step C, filtering to remove particles of impurities which are 1 to 20 micrometers in diameter and are coated inside the mixed oil by using a press filter to obtain a second flow-out substance; step D, hydrocracking the second flow-out substance. The system for processing the coal tar comprises a first press filter, first mixing equipment, a second press filter and hydrogenation equipment which are connected in sequence. The method disclosed by the invention has the advantages of reducing the removal difficulty of small-particle mechanical impurities and dust, realizing high removal rate, prolonging the operation period of the hydrogenating device, and causing no blocking of the removing equipment; meanwhile, the processing system has the advantages of being simple and easy to operate, small in floor area, low in cost, energy-saving, environment-friendly and the like.

Description

technical field [0001] The invention relates to the field of deep processing of coal tar, in particular to a method and system for processing coal tar. Background technique [0002] Coal tar is an organic mixture dominated by aromatic hydrocarbons, which can be processed into various chemicals and high-quality fuel oil. Coal tar is an important by-product of coking industry and coal gasification industry. With the continuous in-depth development of my country's economic construction, especially the iron and steel industry, the coking industry has also developed rapidly, and now my country has developed into the world's largest producer of coke and coal tar. By the end of 2012, the national coal tar production has exceeded 25 million tons per year, but the actual deep processing of coal tar is less than 8 million tons per year, which is a serious waste of resources. With the development of coal coking industry, the output of coal tar is increasing, so the clean processing o...

Claims

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Application Information

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IPC IPC(8): C10G67/14
Inventor 吴建明
Owner GUANGHAN TIANZHOU AERO ENGINE FUEL TECH CO LTD
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