Processing technology of non-caked coal or weakly caking coal

A technology of weakly caking coal and processing technology, applied in the field of coal chemical industry, can solve the problems of short service life of catalysts, and achieve the effects of thorough reaction, prolonging service life and improving utilization rate

Inactive Publication Date: 2013-03-06
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] The inventors have found that at present, for non-caking or weakly caking coals such as lignite, long-flame coal, and gas coal, the service life of the catalyst is short during the hydrogenation reaction.

Method used

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  • Processing technology of non-caked coal or weakly caking coal
  • Processing technology of non-caked coal or weakly caking coal
  • Processing technology of non-caked coal or weakly caking coal

Examples

Experimental program
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Effect test

Embodiment 1

[0059] figure 1 It is the process flow chart of embodiment 1~3.

[0060] Nanning lignite is sent to a medium-low temperature fluidized bed carbonization reactor for carbonization reaction, the pressure is 0.1MPa, and the operating temperature is 500°C to generate carbonization gas, coal tar and semi-coke. The properties of carbonized coal tar are shown in Table 1. After the dry distillation gas is purified, it enters the PSA (Pressure Swing Adsorption) device, and passes through the adsorption bed layer made of zeolite molecular sieve. The reaction generates hydrogen, which together with the hydrogen produced by coal dry distillation, is used as feedstock for coal tar hydrocracking unit by using PSA technology. Dry distillation of semi-coke is sent to a 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 vapo...

Embodiment 2

[0062] The Yilan coal is sent to a medium-low temperature fluidized bed dry distillation reactor for dry distillation reaction, the pressure is 0.12MPa, and the operating temperature is 600°C to generate dry distillation gas, coal tar and semi-coke. The properties of carbonized coal tar are shown in Table 2. After the dry distillation gas is purified, it enters the PSA device, and the hydrogen gas is extracted through the adsorption bed layer composed of silica gel at an operating pressure of 2.45MPa, and the carbon monoxide component is also reacted with water to generate hydrogen gas by using medium-variation technology. , together with the hydrogen produced by coal dry distillation, the feedstock for the coal tar hydrogenation unit is proposed using PSA technology. The semi-coke is dry-distilled and sent to the CFB unit for power generation. The dry distillation coal tar enters the atmospheric fractionation tower after the pretreatment unit, and fractionates the tower top ...

Embodiment 3

[0064] The Yilan lignite is sent to a medium-low temperature 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 PSA (Pressure Swing Adsorption) device 4, and passes through the adsorption bed layer composed of CO special adsorbent, with an operating pressure of 1.2 MPa, to extract the hydrogen therein for the feed of the coal tar hydrogenation device. Dry distillation of semi-coke is sent to a 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 ...

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Abstract

The invention discloses a processing technology of non-caked coal or weakly caking coal, comprising the following steps: a) performing low medium temperature dry distillation reaction to non-caked coal or weakly caking coal to generate coal gas, semicoke and coal tar; b1) extracting hydrogen from the coal gas by pressure swing adsorption; b2) sending the semicoke into a gas generator, ensuring that semicoke, oxygen and water vapour react to generate synthesis gas and coal ash in the gas generator, wherein, the synthesis gas comprises carbon monoxide and hydrogen, or sending the semicoke into acirculating fluidized bed boiler for generating electricity; b3) performing constant pressure fractionation to the coal tar to obtain light fraction, carbolic oil and tower bottom heavy oil, wherein,the tower bottom heavy oil removes trailing asphalt via vacuum distillation to obtain heavy fraction; obtaining phenols and dephenollized phenol oil by extracting phenol oil; and c) performing hydrogenation to light fraction, dephenollized phenol oil, heavy fraction and hydrogen. The technology can prolong the service life of hydrogenation catalyst, can improve the yield of the final product andbrings more products with excellent quality.

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): C10B53/04C01B3/56C10J3/66C10C3/06C10G65/12F01K11/00
CPCY02P20/52
Inventor 姜殿臣秦利彬沈和平赵长林韩雪冬李增文于寿龙杨承强
Owner CHINA COAL ENERGY HEILONGJIANG COAL CHEM
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