Method and system to prepare asphalt with coal liquefaction residue

A technology for preparing system and asphalt, which is applied in the processing of tar pitch/petroleum pitch/natural pitch, processing tar pitch/petroleum pitch/natural pitch by distillation, and processing tar pitch/petroleum pitch/natural pitch by selective extraction, etc. Solve the problems of loss of extractant, frequent filter cake removal, inability to seal operation, etc., to achieve high concentration of solid matter, improve extraction efficiency, and solve the effect of easy blockage

Inactive Publication Date: 2018-08-17
CCTEG CHINA COAL RES INST +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

All these factors lead to great difficulty in solid-liquid separation of coal liquefaction residue, poor separation effect, and difficulty in continuous operation
[0006] The prior art discloses a separation method and separation system for coal liquefaction residues, which adopts a method of one-time filtration and alternate use of two filters, which initially realizes continuous operation. The defect is that the extraction mixture has a high solid content, resulting in a The cake is relatively frequent, and the filter cake is unloaded manually, and the speed of unloading seriously affects the continuous operation process; the unloading process cannot be sealed, and the extraction agent is easy to volatilize and pollute the environment, affecting the health of the operator; and the filter cake contains The residual extractant cannot be recycled, which not only pollutes the environment, but also causes the loss of the extractant and increases the operating cost of the enterprise

Method used

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  • Method and system to prepare asphalt with coal liquefaction residue
  • Method and system to prepare asphalt with coal liquefaction residue
  • Method and system to prepare asphalt with coal liquefaction residue

Examples

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Effect test

Embodiment 1

[0060] Crush 200kg of coal liquefaction residue into residue powder with a particle diameter of less than 1cm, fully mix and stir with 500kg of tetrahydrofuran solvent in a mixed extraction tank at room temperature, and obtain a uniform mixture after stirring for 30 minutes, then perform primary coarse filtration, filter The temperature is normal temperature, the pore size of the filter cloth is 10um, and the filtration pressure is 0.2MPa. 2 Backflushing is carried out, and the powdered filter cake after backflushing is sent to a disk drying system with a drying temperature of 150° C. to obtain a dry raffinate without extractant.

[0061] The filtrate obtained from the first-level coarse filtration system enters the second-level precision filtration system. The filter mesh has a pore size of 1um and a filtration pressure of 0.4MPa. The small-sized solids on the filter are recoiled with an extractant, and the recoil pressure is 0.9MPa. The backwash liquid is sent to the primary...

Embodiment 2

[0065] Crush 100kg of coal liquefaction residue into residue powder with a particle diameter of less than 5mm, fully mix and stir with 600kg of coal liquefaction medium oil (distillation range 200-260°C) in a mixing extraction tank, and stir at 80°C for 100 minutes Finally, a uniform mixture is obtained, and then a primary coarse filtration is carried out. The filtration temperature is normal temperature, the filter cloth pore size is 5um, and the filtration pressure is 0.3MPa. Recoil with air, and the pulverized filter cake is sent to the disc drying system , the drying temperature of the disc drying device is 300°C, and the dry raffinate without extractant is obtained.

[0066] The filtrate obtained from the first-level coarse filtration system enters the second-level precision filtration system. The filter screen has a pore size of 1um and a filtration pressure of 0.5MPa. The small-sized solids on the filter screen are recoiled with an extractant, and the recoil pressure is ...

Embodiment 3

[0070] Crush 100kg of coal liquefaction residue into a residue powder with a particle diameter of less than 1cm, and mix it with 400kg of a mixed solvent. The types of mixed solvents are toluene, tetrahydrofuran, and petroleum ether. The liquefaction residue is fully mixed and stirred in the mixed extraction tank under normal temperature conditions, and a uniform mixture is obtained after stirring for 60 minutes, and then subjected to a primary coarse filtration, the filtration temperature is normal temperature, the filter cloth pore size is 5um, and the filtration pressure is 0.3MPa. 2 Backflushing is carried out, and the pulverized filter cake is sent to the disc drying system. The drying temperature of the disc drying device is 250° C. to obtain a dry raffinate without extractant.

[0071] The filtrate obtained from the first-level coarse filtration system enters the second-level precision filtration system. The filter mesh has a pore size of 0.5um and a filtration pressure ...

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Abstract

The invention relates to a method and system to prepare asphalt with coal liquefaction residue. The system comprises a mixing extracting device, a first filter unit, a second filter unit, a drying device and a distilling device; the mixing extracting device is communicated with the first filter unit; the first filter unit is communicated with the drying device; the first filter unit is communicated with the second filter unit, and the second filter unit is communicated with the distilling device, wherein the first filter unit at least includes a first filter and a second filter; the second filter unit at least includes a third filter and a fourth filter. Each of the two filter units in the system includes two filters arranged in alternate manner, so that continuous production of asphalt isachieved.

Description

technical field [0001] The invention belongs to the field of coal deep processing, and in particular relates to a treatment method for coal direct liquefaction residue, in particular to a method and system for solid-liquid separation of fully extracted coal direct liquefaction residue to obtain refined pitch. Background technique [0002] my country is rich in coal and poor in oil, and the energy security situation is serious. Coal direct liquefaction is an advanced clean coal technology that converts coal into liquid fuel or chemical raw materials by using hydrogen-donating solvents and catalysts to allow hydrogen to enter the molecular structure of coal and its derivatives under high temperature and high pressure. The development of coal liquefaction technology is one of the important ways to alleviate the shortage of petroleum resources and the tight supply and demand of petroleum products in my country. It is also an important measure to improve the utilization rate of c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10C3/00C10C3/08C10C3/06
CPCC10C3/00C10C3/06C10C3/08
Inventor 胡发亭李培霖赵鹏高明秦国东陈来夫石智杰毛学锋赵渊李军芳谷小会吴艳杜淑凤朱肖曼颜丙峰常秋连
Owner CCTEG CHINA COAL RES INST
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