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Treatment method of heavy oil in coal tar

A treatment method, coal tar technology, applied in the treatment of hydrocarbon oil, hydrogenation treatment process, processing of tar pitch/petroleum pitch/natural pitch, etc., can solve the problems of heavy oil transportation pipeline blockage, low oil yield, etc., and achieve reduction Effect of pre-cooling time, high oil yield and low price

Active Publication Date: 2013-12-18
内蒙古庆华集团乌斯太精细化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

The purpose of this method is to solve the problems of low oil yield and heavy oil pipeline blockage in the current coal tar treatment process. Specifically, the heavy oil extracted from the light oil in coal tar is used as raw material, and after being heated to 360-380°C by a heater, Transported to the batch kneader reactor, under the condition of pressure of -20~-30mbar and temperature of 360~420°C, stay for 5~15min to carry out deep separation of light oil remaining in the heavy oil, batch kneader What remains in the reactor is high value-added modified asphalt with a particle size between 3 and 5mm, and the asphalt powder with a particle size of 0.063mm to 0.15mm is obtained after low-temperature crushing

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The raw material is heavy oil extracted from light oil in low-temperature coal tar. After being heated to 365°C by a heater, it is transported to a batch-type kneader reactor manufactured by Swiss List Company. The operating pressure is -28.5 mbar, at a temperature of 370°C, stay for 7.5 minutes for deep separation, and return the obtained light oil to the light oil hydrogenation unit, which can increase the yield of coal tar light oil by 16.2wt%. The remaining bitumen in the batch kneader reactor is a high value-added modified bitumen with a particle size of 3-5mm, which is sent to a liquid nitrogen cooling device to cool to -18.5°C, and then sent to a high-speed rotary with a speed of 900r / min. In the mill, it is crushed into high-quality asphalt powder with a particle size of 0.078-0.13mm through the gap between the rotor and the stator. After testing, the softening point of high-quality asphalt powder is 108°C, the content of β resin is 16.5% (mass fraction), and th...

Embodiment 2

[0028] The raw material is heavy oil extracted from light oil in medium and low temperature coal tar, heated to 368°C by a heater, and then transported to a batch kneader reactor manufactured by LIST Company of Switzerland. The operating pressure is -27mbar, temperature 390°C, stay for 9 minutes for deep separation, and the obtained light oil is returned to the light oil hydrogenation unit, which can increase the yield of coal tar light oil by 16.5wt%. The remaining bitumen in the batch kneader reactor is a high-value-added modified bitumen with a particle size of 3 to 5mm, which is sent to a liquid nitrogen cooling device to cool to -16.5°C, and then sent to a high-speed rotary at a speed of 1000r / min. In the mill, it is crushed into high-quality asphalt powder with a particle size of 0.072-0.12mm through the gap between the rotor and the stator. After testing, the softening point of high-quality asphalt powder is 110°C, the content of β resin is 17.5% (mass fraction), and th...

Embodiment 3

[0030] The heavy oil extracted from medium-temperature coal tar light oil is used as raw material, heated to 378°C by a heater, and then transported to a batch-type kneader reactor manufactured by the Swiss List company. The operating pressure is -24.5 mbar, at a temperature of 398°C, and stay for 14.2 minutes for deep separation. The obtained light oil is returned to the light oil hydrogenation unit, which can increase the yield of coal tar light oil by 13.5wt%. The remaining bitumen in the batch kneader reactor is a high-value-added modified bitumen with a particle size of 3 to 5mm, which is sent to a liquid nitrogen cooling device to cool to -16.5°C, and then sent to a high-speed rotary with a speed of 1100r / min. In the mill, it is crushed into high-quality asphalt powder with a particle size of 0.068mm to 0.10mm through the gap between the rotor and the stator. After testing, the softening point of high-quality asphalt powder is 113°C, the content of β resin is 18.5% (mass...

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Abstract

The invention provides a treatment method of heavy oil in coal tar. The treatment method comprises the following steps of heating heavy oil of light oil extracted in coal tar to 360-380 DEG C, then conveying the heavy oil into an intermittent kneading machine for carrying out negative pressure distillation and separation, returning the light oil obtained by separation to a light oil hydrogenation device, feeding the rest of asphalt, namely modified asphalt with the high additional value and the particle size in the range from 3mm to 5mm into a liquid nitrogen device, cooling to below -15 DEG C to -20 DEG C, then feeding into a high-speed rotary type mill with the rotating speed of 800-1200r / min, and grinding the cooled asphalt particles into 0.0063mm-0.15mm powder when the cooled asphalt particles pass through a gap between a rotor and a stator. The treatment method has the advantages of short technological process and high light oil yield, and is easy to operate.

Description

technical field [0001] The invention belongs to a method for processing coal tar, in particular to a method for processing coal tar heavy oil. Background technique [0002] In 2011, my country's crude oil imports accounted for 56% of the total consumption, making the technology of processing various unconventional petroleum resources to produce light fuel oil a hot topic. my country uses coal as the main energy source, so the development of coal chemical industry is inevitable, especially in the main coal production areas where the price of coal is relatively low, it is economically feasible to develop coal chemical industry. In addition, international oil prices will remain at a high level for a long time. Local governments and enterprises are vigorously developing coal chemical industry out of various considerations such as energy security, economic development, and increasing the diversification rate of raw materials. Therefore, from a strategic point of view, the health...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G67/00C10C3/00
Inventor 陈学伟李改英连作桦崔晓曦左永飞史郭晓
Owner 内蒙古庆华集团乌斯太精细化工有限公司
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