Method and system for removing mechanical impurities and ash contents in coal tar whole fraction

A technology of mechanical impurities and coal tar, which is applied in the field of removing mechanical impurities and ash in the whole fraction of coal tar, can solve problems such as restricting the operation cycle of hydrogenation units, and achieve improved production efficiency and economic benefits, low price, and high removal rate high 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

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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 removing mechanical impurities and ash contents in coal tar whole fraction

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Effect test

Embodiment 1

[0044] A method for removing mechanical impurities and ash in the full fraction of coal tar, comprising the following steps:

[0045] 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;

[0046] 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;

[0047] Step 3: Use a filter press to filter out the large particles wrapped with impurities of 1-20 μm in the mixed oil, and the effluent is the whole fraction of coal tar from which mechanical impurities and ash have been removed.

[0048] The diesel fraction in the second stage has an aromatics content of 6% and a paraffinic content of 45%.

Embodiment 2

[0051] A method for removing mechanical impurities and ash in the full fraction of coal tar, comprising the following steps:

[0052] 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;

[0053] 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;

[0054] Step 3: Use a filter press to filter out the large particles wrapped with impurities of 1-20 μm in the mixed oil, and the effluent is the whole fraction of coal tar from which mechanical impurities and ash have been removed.

Embodiment 3

[0056] A method for removing mechanical impurities and ash in the full fraction of coal tar, comprising 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] Step 2: Mix the first effluent with the diesel fraction at 80°C at a volume ratio of 1:1 to obtain a blended oil;

[0059] Step 3: Use a filter press to filter out the large particles wrapped with impurities of 1-20 μm in the mixed oil, and the effluent is the whole fraction of coal tar from which mechanical impurities and ash have been removed.

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Abstract

The invention discloses a method and a system for removing the mechanical impurities and ash contents in the coal tar whole fraction. The removing method comprises the following steps: step A, filtering to remove the impurities with the diameter of 20-50mu m in the coal tar whole fraction by a pressure filter to obtain a first effluent; step B, mixing the first effluent with the diesel fraction at a volume ratio of 1: (0.1-5) to obtain a mixed oil; and step C: filtering to remove the granules wrapped with the impurities with the diameter of 1-20mu m in the mixed oil by a pressure filter, wherein the effluent is a coal tar whole fraction free of mechanical impurities and ash contents. The removing system comprises a first pressure filter, a first mixing device and a second pressure filter which are in turn connected. By adopting the method, the removing difficulty of the small granular mechanical impurities and ash contents can be reduced, the removing rate is high and the device cannot be blocked; and simultaneously the removing system has the advantages of simple and easy operation, small occupying area, low cost, energy conservation and environmental protection.

Description

technical field [0001] The invention relates to the field of deep processing of coal tar, in particular to a method and system for removing mechanical impurities and ash in the whole fraction of 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...

Claims

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Application Information

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IPC IPC(8): C10G53/02C10C1/00
CPCC10C1/00C10G53/02C10G2300/201
Inventor 吴建明
Owner GUANGHAN TIANZHOU AERO ENGINE FUEL TECH CO LTD
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