Coal tar pretreatment method

A coal tar and pretreatment technology, which is applied in the direction of tar extraction and processing through chemical methods, can solve the problems of large amount of chemical agents, aggravating the difficulty of coal tar pretreatment, and high power consumption

Inactive Publication Date: 2016-06-01
HUNAN CHANGLING PETROCHEM SCI & TECH DEV CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method consumes a large amount of demulsifier and demetallizer, and the cost of coal tar pretreatment is high
[0007] It can be seen that the pretreatment process of coal tar is relatively difficult, the existing technology has high power consumption, large amount of chemical agents, high processing cost, and due to the characteristics of coal tar itself, the emulsification problem also increases the difficulty of coal tar pretreatment. Therefore it is necessary to provide a method for realizing coal tar pretreatment with simple technique and low cost

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0036] This embodiment is used to illustrate the method for coal tar pretreatment of the present invention.

[0037] Preheating coal tar (coal dry distillation coal tar produced in Xundian, Yunnan Province) to 130°C, and preheating an aqueous solution (concentration of 0.15% by weight) of demetallization agent YX-F-101 (commercially available) to 80°C;

[0038] The fiber filaments in the mass transfer space cylinder of the fiber liquid film contactor are 316 series stainless steel wires (commercially available), the aspect ratio of the mass transfer space cylinder is 60:1, and the volume of the fiber liquid film contactor is 0.3L ;

[0039] The preheated coal tar is 6kg / h according to the feed rate, and the liquid hourly space velocity is 20h -1 Add fiber liquid membrane contactor, the aqueous solution of the demetallizing agent YX-F-101 after the preheating is 1.2kg / h (wherein with respect to coal tar, the water injection rate is 20% by weight, the demetallizing agent's Con...

Embodiment 2

[0045] This embodiment is used to illustrate the method for coal tar pretreatment of the present invention.

[0046] Coal tar (coal dry distillation coal tar produced in the Hami area of ​​Xinjiang) and diluent oil (the liquid phase hydrogenation of the coal tar produces oil with a density of 920.1kg / m 3 ) is mixed according to the mass ratio of 1:2, and the density of the obtained pretreatment mixture-1 is 955.5kg / m 3 . Preheat the pretreatment mixture-1 to 80°C, and preheat the aqueous solution (concentration of 0.15% by weight) of the demetallizing agent YX-F-101 (commercially available) to 60°C;

[0047] The fiber filaments in the mass transfer space cylinder of the fiber liquid film contactor are 316 series stainless steel wires (commercially available), the aspect ratio of the mass transfer space cylinder is 60:1, and the volume of the fiber liquid film contactor is 0.3L ;

[0048] The preheated pretreatment mixture-1 is 12kg / h according to the feed rate, and the liqu...

Embodiment 3

[0055] This embodiment is used to illustrate the method for coal tar pretreatment of the present invention.

[0056] Coal tar (produced from the by-product coal tar of the semi-coke dry distillation process in Yulin, Shaanxi) and diluent oil (coal tar hydrogenated to produce oil greater than 170 ° C distillate, density 875.8kg / m 3 ) is mixed according to the mass ratio of 1:1.5, and the density of the obtained pretreatment mixture-2 is 946.3kg / m 3 . Preheat the pretreatment mixture-2 to 120°C, and preheat the aqueous solution (concentration of 0.15% by weight) of demetallizing agent ST-99 (commercially available) to 60°C;

[0057] The fiber filaments in the mass transfer space cylinder of the fiber liquid film contactor are 5 mm glass fiber filaments (commercially available) from the glass fiber factory. The aspect ratio of the mass transfer space cylinder is 50:1, and the fiber liquid film contactor The volume is 0.3L;

[0058] The preheated pretreatment mixture-2 is 12kg / ...

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Abstract

The invention discloses a coal tar pretreatment method. The coal tar pretreatment method comprises that coal tar and a metal removal agent aqueous solution undergo a contact reaction in a fiber liquid film contactor and the reaction product is subjected to oil-water separation. The coal tar pretreatment method has simple processes, greatly saves power consumption, reduces a chemical agent use amount, reduces water pollution, reduces a pretreatment cost, realizes cut water recycle, saves resources and realizes the invention purpose.

Description

technical field [0001] The present invention relates to a method for pretreatment of coal tar, in particular to the deep processing of coal tar. Before the coal tar is hydrogenated, the coal tar is subjected to a pretreatment method such as desalination, demetallization and dehydration. Background technique [0002] Coal tar is a by-product of industries such as coal dry distillation or coal gasification. At present, coal tar is generally sold as a low-quality fuel after simple blending. The product quality is poor, and the combustion causes serious environmental pollution. With the continuous increase of coal tar production and the country's increasing emphasis on environmental protection, the clean processing and effective utilization of coal tar has become more and more important. [0003] Coal tar hydrotreating to produce high-quality fuel oil is an important way for comprehensive utilization of coal tar. This technology not only conforms to the national policy of deve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10C1/20
Inventor 李华佘喜春李庆华朱方明贺际春刘呈立曾志煜王衡亮黄华姚飞
Owner HUNAN CHANGLING PETROCHEM SCI & TECH DEV CO LTD
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