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Extraction system and extraction method of coal liquefaction residue

A coal liquefaction residue and extraction technology, which is applied in the field of extraction system of coal liquefaction residue, can solve problems such as complex extraction process, and achieve the effect of overcoming complex process, efficient extraction and separation, and simple process

Active Publication Date: 2017-06-30
CHNA ENERGY INVESTMENT CORP LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The main purpose of the present invention is to provide an extraction system and extraction method for coal liquefaction residue, so as to solve the problem that the extraction process of coal liquefaction residue is relatively complicated in the prior art

Method used

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  • Extraction system and extraction method of coal liquefaction residue
  • Extraction system and extraction method of coal liquefaction residue
  • Extraction system and extraction method of coal liquefaction residue

Examples

Experimental program
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Effect test

Embodiment 1

[0049] The specific process conditions of extraction are shown in Table 1. use figure 2 The extraction system shown extracts coal liquefaction residue, takes 500 kg of coal liquefaction residue particles with a particle size of 0.2-1.0 mm, puts them into the extraction unit 20 and seals them. Control the carbon dioxide in the carbon dioxide supply unit 01 to enter the heater 14 through the carbon dioxide condenser 11 and the first high-pressure pump 12 at a flow rate of 20 L / h, and the heater 14 heats the mixture from the above-mentioned mixer 13 to further ensure that the carbon dioxide is in a supercritical state.

[0050] Send the carbon dioxide in the heater 14 into the extraction unit 20, the pressure in the extraction unit 20 is 30MPa, and the temperature is 60°C, and the coal liquefaction residue is extracted in the extraction unit 20 to obtain an extract, which contains supercritical A mixture of carbon dioxide fluid and heavy liquefied oil.

[0051] The extract ent...

Embodiment 2

[0053] The specific process conditions of extraction are shown in Table 1. use figure 2 The shown extraction system extracts coal liquefaction residue, takes 500 kg of coal liquefaction residue particles with a particle size of 1.2-2.0 mm, puts them into the extraction unit 20 and seals them. Control the weight ratio of n-hexane and carbon dioxide to be 10:100, carbon dioxide enters the mixer 13 through the carbon dioxide condenser 11, the first high-pressure pump 12, and the n-hexane in the entrainer supply unit 03 enters the second high-pressure pump 15 for pressurization, Then the second high-pressure pump 15 feeds n-hexane as an entrainer into the mixer 13 . The heater 14 heats the mixture from the above-mentioned mixer 13 to further ensure that the carbon dioxide is in a supercritical state.

[0054] Send n-hexane and carbon dioxide in the heater 14 with a weight ratio of 10:100 to the extraction unit 20, the pressure in the extraction unit 20 is 30MPa, and the tempera...

Embodiment 3

[0057] The specific process conditions of extraction are shown in Table 1. use figure 2 The extraction system shown extracts the coal liquefaction residue, and the weight and extraction rate of the obtained heavy liquefied oil are shown in Table 2.

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Abstract

The invention provides an extraction system and an extraction method for coal liquefaction residue. The extraction system includes a supercritical carbon dioxide generating unit and an extraction unit communicated with the supercritical carbon dioxide generating unit. The extraction system first uses a supercritical carbon dioxide generating unit to generate a supercritical carbon dioxide fluid, and secondly uses the supercritical carbon dioxide fluid to extract the coal liquefaction residue in the extraction unit. The diffusion ability of supercritical carbon dioxide fluid is 100 times that of ordinary liquid, so it has good dissolving ability. It can quickly penetrate into the micropore substances, and then realize the rapid and efficient extraction and separation of heavy liquefied oil in coal liquefaction residue . The method can extract the heavy liquefied oil from the coal liquefaction residue only by using the supercritical carbon dioxide generation unit and the extraction unit, the process flow is simple, and the problem of the complex process flow of extracting the coal liquefaction residue in the prior art is overcome.

Description

technical field [0001] The invention relates to the field of coal chemical processing, in particular to an extraction system and an extraction method for coal liquefaction residue. Background technique [0002] Coal liquefaction residue is a by-product of the direct coal liquefaction process, mainly composed of heavy liquefied oil, bituminous substances, unconverted coal, minerals in coal and external catalysts. Heavy liquefied oil and bituminous substances account for about 50% of the total residue, unconverted coal accounts for about 30% of the total residue, and ash accounts for about 20%. Therefore, about 50% of the bituminous substances and heavy liquefied oil in the liquefaction residue can be separated for comprehensive development and utilization, and more valuable products can be extracted from it, especially the heavy liquefied oil in the coal liquefaction residue Used as a circulating solvent for direct coal liquefaction to increase the overall profitability of d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D11/02
Inventor 常鸿雁张传江李克健章序文张元新程时富舒成
Owner CHNA ENERGY INVESTMENT CORP LTD
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