Low rank pulverized coal pyrolysis oil extraction process

A pulverized coal and pyrolysis technology, applied in the petroleum industry, special forms of dry distillation, coke ovens, etc., can solve the problem of excessive tar residue, reduce the loss of tar, reduce the generation of dust, and improve the total yield. Effect

Inactive Publication Date: 2016-01-27
CHINA UNIV OF MINING & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of the above existing technical problems, the present invention provides a low-rank pulverized coal pyrolysis oil extraction process to solve the problem of excessive tar residue in the oil produced in the low-rank coal low-temperature carbonization pyrolysis process, and can also separate the The reuse of tar residue not only improves the yield of oil, but also utilizes the difficult-to-handle oil residue, so that a large amount of low-rank coal powder can be efficiently utilized through pyrolysis to extract oil

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] First, to 100 parts of low-rank coal powder crushed to a particle size of less than 3mm, add 10 parts of 2% aqueous solution of sage powder and 15 parts of strong caking coal powder, which can be gas-fertilized coal, fat coal, coking coal or 1 / 3 coking coal powdered coal, and mix well.

[0019] Then, the aforementioned mixture is pressed into blocks on a briquetting device. After many tests, it can be seen that 15 parts of fat coal pulverized coal has the best effect on ensuring the thermal strength of low-rank pulverized coal compared with other strong caking coal pulverized coal, and the integrity of lump coal is the best, which can reduce the lumpiness to the greatest extent. Dust from coal heating.

[0020] Next, after the above-mentioned lump coal is dried, enter the pyrolysis furnace to isolate the air and raise the temperature to 550°C for 15 minutes, and condense and cool the generated volatiles to obtain gas phase gas, tar, water, oil residue mixture and soli...

Embodiment 2

[0024] Firstly, add 100 parts of low-rank coal powder, 12 parts of 1.2% aqueous solution of safflower powder, 11 parts of coking coal powder, and mix well.

[0025] Then, the aforementioned mixture is pressed into blocks on a briquetting device.

[0026] Next, after the above-mentioned lump coal is dried, enter the pyrolysis furnace to isolate the air and raise the temperature to 600°C for 10 minutes, and condense and cool the generated volatiles to obtain the gas phase gas, tar, water, oil residue mixture and solid semi coke, and after separation, tar, water and tar residue are obtained. After several tests, it is concluded that 600°C is the best pyrolysis temperature. If the temperature is too low, the pyrolysis and tar extraction will be insufficient. If the temperature is too high, energy will be wasted and dust will easily be generated.

[0027] Finally, the recovered tar residue is used as the binder component for the next briquetting, and is added to 100 parts of low-r...

Embodiment 3

[0029] First, add 100 parts of low-rank coal powder, 15 parts of 0.5% aqueous solution of sage powder, and 8 parts of gas fertilizer coal, and mix them evenly.

[0030] Then, the aforementioned mixture is pressed into blocks on a briquetting device.

[0031] Next, after the above lump coal is dried, it enters the pyrolysis furnace and heats up to 650°C for 5 minutes in isolation from the air, and condenses and cools the generated volatiles to obtain gas phase gas, tar, water, oil residue mixture and solid semi-coke . The mixture of tar, water and oil residue can be separated to obtain tar, tar residue and pyrolysis water.

[0032] Finally, tar slag is recovered as the binder component for the next briquetting, and added to the low-rank coal powder, the quantity is not limited, together with the water solution of safflower powder to ensure the cold strength of the lump coal, and at the same time, it enters with the lump coal In the pyrolysis link, the tar is refined and recov...

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PUM

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Abstract

The invention discloses a low rank pulverized coal pyrolysis oil extraction process. The process includes: taking 100 parts of low rank pulverized coal, 10-15 parts of a 0.5%-2% organic binder, and 8-15 parts of strong adhesive pulverized coal as the raw materials, and mixing the material evenly, and extruding the mixture into block coal on briquetting equipment; drying the block coal, then putting it into a pyrolysis furnace, conducting air isolation heating at 550-650DEG C, recovering the volatile and performing condensation and cooling so as to obtain gas phase coal gas, a tar, water and tar residue mixture, and solid semicoke, separating the tar, water and tar residue to obtain tar, tar residue and water; and adding the each time separated tar residue into the raw material of follow-up oil extraction process to be used as an auxiliary adhesive for briquetting of low rank pulverized coal. Therefore, the a lot of powder of low rank coal can be utilized efficiently, and the tar yield is significantly increased.

Description

technical field [0001] The invention relates to a pyrolysis oil extraction process, which is especially suitable for low-rank pulverized coal. Background technique [0002] In recent years, the mining and use of low-rank coals such as lignite, long-flame coal, and non-caking coal in my country has gradually increased. However, low-rank coal often brings inconvenience to transportation and use due to its high moisture content and low calorific value. The utilization value of low-rank pulverized coal is greatly reduced, and many places even give up the pulverized coal of low-rank coal, resulting in a huge waste of resources. [0003] An important utilization method of low-rank coal is low-temperature pyrolysis to extract oil, but the current technology can only use lump coal, and it is difficult to use pulverized coal below 6 mm, or the utilization effect is poor, and the economic benefits are not good. The biggest problem with the pyrolysis utilization of pulverized coal is t...

Claims

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Application Information

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IPC IPC(8): C10B53/04C10B53/08C10B57/12C10B57/14
Inventor 张双全马苏卿涛
Owner CHINA UNIV OF MINING & TECH
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