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Incoherence or weak caking coal deep processing method

A weakly cohesive coal and cohesive technology, applied in the field of coal chemical industry, can solve the problems of high operating cost, immature technology and high investment, and achieve the effects of reducing pollution, reducing treatment costs and reducing environmental protection investment

Inactive Publication Date: 2009-09-23
胜帮科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current direct coal liquefaction technology is immature, and the investment is quite high, and the operating cost is also quite large

Method used

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  • Incoherence or weak caking coal deep processing method
  • Incoherence or weak caking coal deep processing method
  • Incoherence or weak caking coal deep processing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Nanning lignite is sent to medium-low temperature fluidized bed carbonization reactor 1 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 4, and passes through the adsorption bed layer made of zeolite molecular sieve. The operating pressure is 2MPa, and the hydrogen in it is extracted, and the carbon monoxide component in it is also combined with the medium change technology. The water reacts to generate hydrogen, which together with the hydrogen generated by coal dry distillation is used as feedstock for the coal tar hydrocracking unit 8 by using PSA technology. Dry distillation semi-coke is sent to the fluidized bed gas generator 2 to react with oxygen and water vapor to produce synthesis gas and coal ash. When the sem...

Embodiment 2

[0034] The Yilan coal is sent to medium-low temperature fluidized bed carbonization reactor 1 for carbonization reaction, the pressure is 0.12MPa, and the operating temperature is 600°C to generate carbonization 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 (Pressure Swing Adsorption) device 4, through the adsorption bed layer composed of silica gel, the operating pressure is 2.45MPa, and the hydrogen gas is extracted, and the carbon monoxide component is also recovered by using medium-range technology. The reaction with water produces hydrogen, which together with the hydrogen produced by coal dry distillation, is proposed as feedstock for the coal tar hydrogenation unit 8 by using PSA technology. The semi-coke is dry-distilled and sent to a CFB (circulating fluidized bed boiler) device 3 for power generation. The carbonized coal tar enters the atmospheric fractionation t...

Embodiment 3

[0036] The Ylang lignite is sent to medium-low temperature fluidized bed carbonization reactor 1 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) unit 4, and passes through the adsorption bed 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 unit 8. Dry distillation semi-coke is sent to the fluidized bed gas generator 2 to react 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 i...

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Abstract

The invention discloses an incoherence or weak caking coal deep processing method. Firstly, coking coal is fed into a carbonization reactor to carry out carbonization reaction, thus generating coal gas, carbocoal and coal tar; hydrogen in the coal gas is extracted out by pressure swing absorption; the carbocoal is fed into a coal gas generator and reacts with oxygen and water vapour to generate synthesis gas and coal ash; or the carbocoal is fed into a circulating fluid bed boiler to carry out generating; the coal tar enters a normal pressure fractionating tower to obtain creosoted oil, oil at the top of the tower and heavy oil at the bottom of the tower; wherein the creosoted oil is extracted to obtain crude phenol product and dephenolized oil, the dephenolized oil and heavy oil at the bottom of the tower enter a delayed coking device to carry out thermal cracking reaction. Through the optimization design of the flow, the invention realizes the deep processing of incoherence or weak caking coal such as ignite, long flame coal, gas coal and the like, and effectively improves the utilization factor of the materials.

Description

technical field [0001] The invention relates to the field of coal chemical industry, in particular to a coal deep processing technology, in particular to a non-caking or weak caking coal deep processing technology. Background technique [0002] Non-caking or weakly caking coals include: lignite, long-flame coal, gas coal, etc. Lignite is a non-caking or weakly caking coal, and it is the coal with the lowest degree of coalification. It is characterized by high moisture, low specific gravity, high volatile content, non-sticking, strong chemical reactivity, poor thermal stability, low calorific value, and contains different amounts of humic acid. It is mostly used as fuel and raw material for gasification, and 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 c...

Claims

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Application Information

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IPC IPC(8): C10B57/02C10B53/00C10J3/00C10G69/06C10G21/02
CPCY02E20/18
Inventor 沈和平杨承强
Owner 胜帮科技股份有限公司
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