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Method for quick pyrolysis of coal direct liquefaction residues by utilizing microwaves

A technology for direct liquefaction of coal and residues, which is used in the preparation of liquid hydrocarbon mixtures, special forms of dry distillation, and petroleum industry.

Inactive Publication Date: 2011-09-28
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the use of liquefied residue gasification hydrogen production process is an effective way to solve the comprehensive utilization of residues, people's understanding of liquefied residues is still in its infancy, the formation conditions of liquefied residues, the enrichment of catalysts and the content of inorganic minerals have great The impact of the process still needs further research and exploration
In my country, although Shenhua Group Coal Liquefaction Company has completed the preliminary research work of residue gasification hydrogen production, and selected Texaco and Shell gasification processes to carry out liquefaction residue gasification respectively, it has not yet found a completely feasible industrial production route.

Method used

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  • Method for quick pyrolysis of coal direct liquefaction residues by utilizing microwaves
  • Method for quick pyrolysis of coal direct liquefaction residues by utilizing microwaves
  • Method for quick pyrolysis of coal direct liquefaction residues by utilizing microwaves

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] As shown in Figure 1, the method for utilizing microwave fast pyrolysis coal to directly liquefy residue is characterized in that it comprises the following steps:

[0023] The first step is to use the grinding equipment to crush the coal direct liquefaction residue to a particle size of 30mm;

[0024] In the second step, the pulverized coal direct liquefaction residue is dried in a drying device at 100°C for 20 minutes;

[0025] The third step is to place the dried coal direct liquefaction residue in a microwave pyrolysis reactor, turn on the power, set the microwave frequency for heating to 2450MHz, heat to 900°C, and stay for 15 minutes to obtain solid coke and pyrolysis gas;

[0026] In the fourth step, the solid coke is collected after being cooled to normal temperature by the water cooling system, and the pyrolysis gas is collected through the primary air cooling system and the secondary liquid phase condensation system to separate liquid oil and gas.

Embodiment 2

[0028] As shown in Figure 1, the method for utilizing microwave fast pyrolysis coal to directly liquefy residue is characterized in that it comprises the following steps:

[0029] The first step is to use the grinding equipment to crush the coal direct liquefaction residue to a particle size of 10mm;

[0030] In the second step, the pulverized coal direct liquefaction residue is dried in a drying device at 100°C for 30 minutes;

[0031] The third step is to place the dried coal direct liquefaction residue in a microwave pyrolysis reactor, turn on the power, set the microwave frequency for heating to 2450MHz, heat to 800°C, and stay for 10 minutes to obtain solid coke and pyrolysis gas;

[0032] In the fourth step, the solid coke is collected after being cooled to normal temperature by the water cooling system, and the pyrolysis gas passes through the primary air cooling system and the secondary liquid phase condensation system to separate liquid oil and gas and collect them se...

Embodiment 3

[0034] As shown in Figure 1, the method for utilizing microwave fast pyrolysis coal to directly liquefy residue is characterized in that it comprises the following steps:

[0035] The first step is to use the grinding equipment to crush the coal direct liquefaction residue to a particle size of 5mm;

[0036] In the second step, the pulverized coal direct liquefaction residue is dried in a drying device at 100°C for 40 minutes;

[0037] The third step is to place the dried coal direct liquefaction residue in a microwave pyrolysis reactor, turn on the power, set the microwave frequency for heating to 915MHz, heat to 500°C, and stay for 5 minutes to obtain solid coke and pyrolysis gas;

[0038] In the fourth step, the solid coke is collected after being cooled to normal temperature by the water cooling system, and the pyrolysis gas passes through the primary air cooling system and the secondary liquid phase condensation system to separate liquid oil and gas and collect them separ...

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Abstract

The invention relates to a method for the quick pyrolysis of coal direct liquefaction residues by utilizing microwaves, which comprises the following steps of: heating the coal direct liquefaction residues to the temperature of between 500 and 900 DEG C by utilizing the microwaves as a heating heat source; crushing the coal direct liquefaction residues to less than 30 millimeters, and putting into drying equipment for drying; and putting the dried coal direct liquefaction residues into a microwave pyrolysis reactor, heating to the temperature of between 500 and 900 DEG C to obtain solid coke and pyrolysis gas, and cooling to separate liquid oil from gas. The method is mainly used for recycling the coal direct liquefaction residues comprehensively, and hydrogen-rich gas is obtained while the liquid oil is separated quickly and efficiently, so the method has characteristics of high pyrolysis speed, production efficiency, yield of the liquid oil and hydrogen content in the gas.

Description

technical field [0001] The invention belongs to the technical field of coal pyrolysis, and relates to a method for pyrolyzing coal direct liquefaction residue, in particular to a method for utilizing microwave rapid pyrolysis coal direct liquefaction residue. Background technique [0002] my country's energy structure is characterized by "more coal, less oil, and less gas". With the rapid development of the economy and the improvement of people's living standards, the demand for energy, especially oil, has entered a period of rapid growth. Due to a large amount of imported oil, it not only increases the dependence on foreign energy, but also the fluctuation and change of the international oil market will directly affect the security of our country's economy and energy supply. my country has abundant coal resources, making full use of my country's abundant coal resources and vigorously developing direct liquefaction technology is one of the effective ways to solve the oil sho...

Claims

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Application Information

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IPC IPC(8): C10B53/00C10B57/00C10B57/10C10G1/00
Inventor 宋永辉兰新哲付建平赵西成周军张秋利
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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