Forming destructive distillation method for crushed low metamorphic coal powder, asphalt and tar residues

A low-metamorphism pulverized coal and tar residue technology, applied in the field of coal chemical industry, can solve problems affecting low-metamorphism pulverized coal mid-low temperature pyrolysis upgrading, product quality and performance, and coke product cracking, etc., to alleviate coal resources The effects of shortage, enhanced mechanical strength, and improved oil yield

Active Publication Date: 2017-05-24
YULIN UNIV
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  • 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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  • Forming destructive distillation method for crushed low metamorphic coal powder, asphalt and tar residues
  • Forming destructive distillation method for crushed low metamorphic coal powder, asphalt and tar residues
  • Forming destructive distillation method for crushed low metamorphic coal powder, asphalt and tar residues

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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 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, 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 forming m...

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Abstract

The invention discloses a method of preparing formed semi-coke by using low metamorphic coal powder, asphalt and tar residues as raw materials and belongs to the technical field of coal chemical engineering. The method comprises the following steps: mixing and crushing low metamorphic coal, asphalt and tar residues to obtain raw material powder; pressurizing and forming the raw material powder in a forming mould to obtain molded coal; and pyrolyzing the molded coal in a destructive distillation device to obtain molded semi-coke, coal tar and gas. By taking the coal ash as the raw material, the utilization efficiency is improved, so that the problem that the semi-coke producing raw material is insufficient is solved, and meanwhile, the situation that the coal resource is short is also alleviated; by using asphalt and tar residues as an adhesive, not only is the problem that waste residues generated in the chemical engineering production process cannot be effectively treated and the utilization value is low to realize recycle of the abandoned resource, but also remarkably improves the oil yield of the coal tar. The stability and mechanical strength of the molded coal and the molded semi-coke are remarkably enhanced, and the economical benefit of an enterprise is extremely improved, thereby developing a novel path 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 Applications(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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