System for preparing semi-coke from low-rank coal and method for preparing semi-coke

A low-rank coal and semi-coke technology, which is applied in the field of coal resource optimization, can solve the problems of low pulverized coal forming rate, low pellet strength, and serious gas explosion, so as to increase pelleting rate and pellet strength, and increase pulverized coal Ball forming rate and effect of reducing ash content

Pending Publication Date: 2018-01-12
SHENWU TECH GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This system will solve the problems of low pulverized coal molding rate, severe gas explosion, and low ball strength, thereby improving the quality and yield of oil, gas and semi-coke in the subsequent pyrolysis process, and by using the waste heat generated in the pyrolysis process It is used for recycling, which can significantly reduce energy consumption; at the same time, pulverized coal and lump coal are treated separately to improve the utilization rate of raw materials

Method used

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  • System for preparing semi-coke from low-rank coal and method for preparing semi-coke
  • System for preparing semi-coke from low-rank coal and method for preparing semi-coke

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] Such as figure 2 As shown, the method for preparing semi-coke using the above-mentioned system comprises the following steps:

[0057] The low-rank coal is sent from the coal bunker 1 through the bucket elevator to the low-rank coal inlet and enters the screening device 2 for sieving and classification. The screening device 2 has an aperture of 5mm and is divided into lump coal on the screen and pulverized coal under the screen. ;The lump coal on the screen is discharged from the lump coal outlet on the screen, and the pulverized coal under the screen is discharged from the pulverized coal outlet under the screen;

[0058] The pulverized coal is transported to the airflow sorting device 3 through the pulverized coal inlet under the sieve for airflow separation, and the airflow velocity of the sorted airflow is 8m / s to obtain fine coal;

[0059] The pulverized clean coal and binding agent obtained above are carried out in kneading device 4 according to the mass ratio o...

Embodiment 2

[0068] Such as figure 2 As shown, the method for preparing semi-coke using the above-mentioned system comprises the following steps:

[0069] The low-rank coal is sent from the coal bunker 1 through the bucket elevator to the low-rank coal inlet and enters the screening device 2 for sieving and classification. The screening device 2 has an aperture of 5mm and is divided into lump coal on the screen and pulverized coal under the screen. ;The lump coal on the screen is discharged from the lump coal outlet on the screen, and the pulverized coal under the screen is discharged from the pulverized coal outlet under the screen;

[0070] The pulverized coal is transported to the airflow sorting device 3 through the pulverized coal inlet under the sieve for airflow separation, and the airflow velocity of the sorted airflow is 4m / s to obtain fine coal;

[0071] The pulverized clean coal and binding agent obtained above are carried out in the kneading device 4 according to the mass rat...

Embodiment 3

[0080] Such as figure 2 As shown, the method for preparing semi-coke using the above-mentioned system comprises the following steps:

[0081] The low-rank coal is sent from the coal bunker 1 through the bucket elevator to the low-rank coal inlet and enters the screening device 2 for sieving and classification. The screening device 2 has an aperture of 5mm and is divided into lump coal on the screen and pulverized coal under the screen. ;The lump coal on the screen is discharged from the lump coal outlet on the screen, and the pulverized coal under the screen is discharged from the pulverized coal outlet under the screen;

[0082] The pulverized coal is transported to the airflow separation device 3 through the pulverized coal inlet under the sieve for airflow separation, the airflow velocity of the sorted airflow is 11m / s, and the fine coal is obtained;

[0083] The pulverized clean coal and binder obtained above are carried out in the kneading device 4 according to the mass...

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Abstract

The invention relates to a system for preparing semi-coke from low-rank coal. The system comprises an air classification unit, a kneading unit, a tar oxidation unit, a screening unit, a shaping unit,a pyrolysis unit, a coal gas cooling unit, and a residual heat recovery unit. The invention further relates to a method for preparing semi-coke by using the system. The method and the system disclosedby the invention can solve the problems of low pulverized coal ball formation rate, low ball strength, severe gas explosion and a lot of half balls, and thus, the utilization rate of powder can be increased; and moreover, the yield and quality of pyrolytic tar and gas and semi-coke obtained by the method are high.

Description

technical field [0001] The invention relates to coal resource optimization, and more specifically, to a system for preparing semi-coke from low-rank coal and a method for preparing semi-coke. Background technique [0002] Coal is an important part of the world's primary energy, accounting for the first place in the world's energy. China is the world's largest coal producer and consumer. Coal production accounts for 37% of the world's total coal production, and the proportion of coal in my country's primary energy structure is about 70%. my country has a complete range of coal resources, among which low-rank coal reserves are the largest. Most of the lumpy low-rank coal in China is made into semi-coke through pyrolysis, which is widely used in submerged arc furnaces, ferroalloys, yellow phosphorus, calcium carbide smelting, coal-to-gas, and various kiln combustion. The property is not good, and the pyrolysis cannot be carried out smoothly. At the same time, from the perspe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10B53/08C10B57/00C10B57/08
Inventor 祁娟邓鑫赵飞翔高建刘涛吴道洪
Owner SHENWU TECH GRP CO LTD
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