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A low-modification pulverized coal, asphalt, and tar slag are pulverized and formed into dry distillation method

A technology for low-metamorphic pulverized coal and tar residues, which is applied in the coal chemical industry, can solve the problems affecting the low-temperature pyrolysis upgrading and classification of low-metamorphic pulverized coal, affecting product quality and performance, and breaking coke products, etc., so as to alleviate coal resources. The effect of shortage, enhanced mechanical strength, and improved oil yield

Active Publication Date: 2021-02-02
YULIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This technology makes full use of solid waste such as heavy oil and tar residue. However, during the carbonization process of the molded coal, the tar residue particles are large, and it is easy to cause expansion during the carbonization process, resulting in the cracking of the molded coke product, which affects product quality. and performance, which means that the particle size of tar residue, how to disperse into a uniform emulsion, and whether the pulverized coal, heavy oil, and tar residue are uniformly mixed before pressure molding seriously affect the medium and low temperature pyrolysis upgrading of low-modification pulverized coal grading

Method used

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  • A low-modification pulverized coal, asphalt, and tar slag are pulverized and formed into dry distillation method
  • A low-modification pulverized coal, asphalt, and tar slag are pulverized and formed into dry distillation method
  • A low-modification pulverized coal, asphalt, and tar slag are pulverized and formed into dry distillation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Such as figure 1 As shown, a method for preparing semi-coke with low metamorphic pulverized coal, asphalt, and tar residue as raw materials, specifically in the following order:

[0033] (1) According to the mass ratio of 85% of low metamorphic pulverized coal, 10% of asphalt, and 5% of tar residue, mixed and crushed to obtain raw material powder with particle size controlled at 0.1mm, wherein the low metamorphic pulverized coal is long-flame coal; The tar residue is the high oil-containing solid waste deposited in the tar pool after pyrolysis of low-modified coal; the pitch is the solid residue coal tar pitch or coal tar pitch coke obtained after distillation or delayed coking of medium and low temperature heavy coal tar;

[0034] (2) press molding the raw material powder of step (1) gained under the condition of 10MPa in the molding die, obtain briquette;

[0035] (3) After naturally drying the briquettes obtained in step (2) for 28 hours, carry out pyrolysis at 750°...

Embodiment 2

[0039] Such as figure 1 As shown, a method for preparing semi-coke with low metamorphic pulverized coal, asphalt, and tar residue as raw materials, specifically in the following order:

[0040] (1) According to the mass ratio of 82% of low metamorphic pulverized coal, 8% of asphalt, and 10% of tar residue, mixed and crushed to obtain raw material powder whose particle size is controlled at 0.1mm; wherein the low metamorphic pulverized coal is long-flame coal and A mixture of weakly caking coal with a mass ratio of 1:2; the tar residue is a high-oil solid waste deposited in a tar pool after pyrolysis of low-modified coal; the pitch is petroleum pitch obtained after petroleum fractionation;

[0041] (2) press molding the raw material powder of step (1) gained under the condition of 5MPa in the forming mold, obtain briquette;

[0042] (3) After naturally drying the briquettes obtained in step (2) for 24 hours, carry out pyrolysis at 650° C. for 4 hours in a retort device to obta...

Embodiment 3

[0046] Such as figure 1 As shown, a method for preparing semi-coke with low metamorphic pulverized coal, asphalt, and tar residue as raw materials, specifically in the following order:

[0047](1) According to the mass ratio of 75% of low metamorphic pulverized coal, 15% of asphalt, and 13% of tar slag, mixed and crushed to obtain raw material powder whose particle size is controlled at 0.1mm; wherein the low metamorphic pulverized coal is long-flame coal, A mixture of weakly caking coal and non-caking coal with a mass ratio of 2:2:1; the tar residue is a high-oil solid waste deposited in the tar pool after pyrolysis of low-modified coal; the pitch is a medium-low temperature heavy coal tar distilled Or the solid residue coal tar pitch or coal tar pitch coke obtained after delayed coking, or the petroleum pitch obtained after petroleum fractionation treatment;

[0048] (2) press molding the raw material powder of step (1) gained under the condition of 5MPa in the molding die,...

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Abstract

The invention discloses a method for preparing semi-coke by using low-modified pulverized coal, asphalt and tar residue as raw materials, which belongs to the technical field of coal chemical industry. The low-modified pulverized coal, pitch and tar residue are mixed and crushed to obtain raw material powder; The raw material powder is pressure-molded in a molding die to obtain briquettes; the briquettes are pyrolyzed in a retort device to obtain semi-coal, coal tar and gas. The invention uses pulverized coal as raw material, which improves utilization efficiency, solves the problem of insufficient raw materials for semi-coke production, and alleviates the situation of shortage of coal resources at the same time; uses pitch and tar residue as adhesives, which not only solves the problem in the chemical production process The generated waste slag can not be effectively treated and the use value is low, which realizes the reuse of waste resources, and also significantly improves the oil yield of coal tar, significantly enhances the stability and mechanical strength of shaped coal and shaped semi-coke, and greatly improves It has improved the economic benefits of the enterprise and opened up a new way for semi-coke production.

Description

technical field [0001] The invention belongs to the technical field of coal chemical industry, in particular to a method for forming dry distillation after pulverizing low-modified pulverized coal, asphalt and tar residue. Background technique [0002] The low-metamorphic coal resources in northern Shaanxi are long-flame coal, non-caking coal and weakly caking coal, which are oil-rich coals with low ash, low sulfur, low phosphorus, and high calorific value. Using the internal heating vertical furnace production process, not only can obtain and replace anthracite coal The clean fuel semi-coke can be extracted into coal tar and gas products at the same time, providing technical support for the realization of high-quality and efficient utilization of coal. However, the raw coal that can be processed by the existing technology is limited to 30-80mm lump coal, but in the process of mining and transportation, a large amount of pulverized coal will be produced, which is difficult t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10B55/02C10G1/00
CPCC10B55/02C10G1/00
Inventor 李健闫龙王玉飞张超
Owner YULIN UNIV
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