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Process technology for non-caking coal or weak caking coal

A technology of weakly caking coal and processing technology, which is applied in the field of coal chemical industry to achieve the effects of improving the utilization rate of raw materials, protecting equipment and improving utilization rate

Inactive Publication Date: 2012-10-03
CHINA COAL ENERGY HEILONGJIANG COAL CHEM +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] At present, for non-caking or weakly caking coals such as lignite, long-flame coal, and gas coal, there is still a lack of a processing technology that can make good use of non-caking or weakly caking coals.

Method used

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  • Process technology for non-caking coal or weak caking coal
  • Process technology for non-caking coal or weak caking coal
  • Process technology for non-caking coal or weak caking coal

Examples

Experimental program
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Effect test

Embodiment 1

[0069] Nanning lignite is sent to a fluidized bed carbonization reactor for carbonization reaction at a pressure of 0.1MPa and an operating temperature of 500°C to generate gas, coal tar and semi-coke. The properties of coal tar are shown in Table 1. After the gas is purified, it enters the pressure swing adsorption device, passes through the adsorption bed layer composed of zeolite molecular sieve, etc., and the operating pressure is 2MPa, and the hydrogen gas in it is extracted, and the carbon monoxide component in it is also reacted with water to generate Hydrogen is obtained, together with the hydrogen produced by coal dry distillation, the pressure swing adsorption technology is used to propose the feed for the coal tar hydrocracking unit. The semi-coke is sent to the fluidized bed gas generator, where it reacts with oxygen and water vapor to produce synthesis gas and coal ash. When the semi-coke is gasified, the semi-coke reacts with oxygen and water vapor (the volume rat...

Embodiment 2

[0073] The Yilan coal is sent to a medium fluidized bed carbonization reactor for carbonization reaction, the pressure is 0.12MPa, and the operating temperature is 600°C to generate gas, coal tar and semi-coke. The properties of coal tar are shown in Table 2. After the gas is purified by dry distillation, it enters the pressure swing adsorption device, passes through the adsorption bed composed of silica gel, etc., and the operating pressure is 2.45MPa, and the hydrogen gas in it is extracted, and the carbon monoxide component in it is also reacted with water by medium-range technology Hydrogen is generated, and together with the hydrogen from coal dry distillation, the pressure swing adsorption technology is used to propose the feed for the coal tar hydrogenation unit. The semi-coke is sent to the fluidized bed gas generator, where it reacts with oxygen and water vapor to produce synthesis gas and coal ash. When the semi-coke is gasified, the semi-coke reacts with oxygen and...

Embodiment 3

[0077] Send the Yilan lignite into the fluidized bed carbonization reactor for carbonization reaction, the pressure is 0.18MPa, and the operating temperature is 650°C to generate carbonization gas, coal tar and semi-coke. The properties of carbonized coal tar are shown in Table 3. After the dry distillation gas is purified, it enters the pressure swing adsorption device, and passes through the adsorption bed composed of carbon monoxide adsorbent, etc., with an operating pressure of 1.2MPa, and the hydrogen in it is extracted for the feed of the coal tar hydrogenation device. The semi-coke is sent to the fluidized bed gas generator, where it reacts with oxygen and water vapor to produce synthesis gas and coal ash. When the semi-coke is gasified, the semi-coke reacts with oxygen and water vapor (the volume ratio of water vapor and oxygen is 5:1) to produce synthesis gas (carbon monoxide and hydrogen) and coal ash; the reaction pressure of the gas generator is 1.6 MPa, and the re...

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Abstract

The invention discloses a process technology for non-caking coal or weak caking coal, which comprises the following steps: firstly non-caking coal or weak caking coal is carbonized at low-and-medium temperature to generate semicoke, coal gas and coal tar; then the three carbonization products are respectively processed: first, the semicoke is gasified into synthesis gas which is then subjected toFischer-Tropsch synthesis to prepare paraffin hydrocarbons; second, the hydrogen in the coal gas is extracted by using the pressure varying adsorption technology; and third, the coal tar is fractionated to obtain phenolated oil, tower top oil and tower bottom oil, the phenolated oil is extracted to obtain phenols and dephenolized oil, the tower bottom heavy oil and the dephenolized oil are subjected to delayed coking to obtain coking gas, coking naphtha, coking diesel fuel, coking wax oil and coke; and then the extracted hydrogen is used to conduct hydrotreatment on the paraffin hydrocarbons,coking naphtha, coking diesel fuel and coking wax oil; finally the hydrogenation products respectively obtained are mixed.

Description

technical field [0001] The invention relates to a coal processing technology, in particular to a processing technology of non-caking coal or weakly caking coal, and belongs to the field of coal chemical industry. Background technique [0002] Non-caking coal or weakly caking coal includes lignite, long-flame coal and gas coal. Lignite is the coal with the lowest degree of coalification. It has high moisture, low specific gravity, high volatile content, non-caking, strong chemical reactivity, poor thermal stability, low calorific value, and contains different amounts of humic acid. It is mostly used as fuel , The raw material of gasification can also be used to extract montan wax and humic acid to make sulfonated coal or activated carbon. Long-flame coal also has a high volatile content, has no or only a small amount of cohesion, is easy to burn, and has a long flame when burned, so it is named long-flame coal. Long-flame coal can be used as raw material for gasification, a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10B53/04C10J3/66C10K1/32C10G2/00C10G7/00C10G69/06C10G67/02
CPCY02E20/18
Inventor 姜殿臣秦利彬沈和平赵长林韩雪冬杨承强李增文
Owner CHINA COAL ENERGY HEILONGJIANG COAL CHEM