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System and method for continuously producing mesophase pitch

A mesophase pitch and asphalt technology, which is applied in the field of mesophase pitch production, can solve the problems of insufficient product uniformity and insufficient content of mesophase pitch, and achieve the effects of ensuring mass production, reducing the degree of coking, and good uniformity

Inactive Publication Date: 2020-11-17
CHNA ENERGY INVESTMENT CORP LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a system for continuous production of mesophase pitch and a method for continuously producing mesophase pitch using the system in order to overcome the problems of insufficient mesophase pitch and / or insufficient product uniformity in the prior art. method

Method used

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  • System and method for continuously producing mesophase pitch

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Pass the raw material medium temperature coal tar pitch into the figure 1 In the system shown, pass through the following devices in sequence and set the following parameters:

[0053] (1) Drying and crushing device 1: firstly, it is dried to a water content of 0.8% by weight through a drying device, and then crushed to a particle size of 3 mm or less using a crushing device;

[0054] (2) lifting metering device 2: the material is lifted to the top of the extruding feeding device 3 at the same level as the liquid material inlet of the reaction device 4, and the weight entering is controlled by a weight loss scale;

[0055] (3) Extrusion feeding device 3 (specifically a twin-screw extruder): the material is melted in the extrusion feeding device 3 and heated to 420°C, and enters the reaction device 4 through the liquid material inlet of the reaction device 4;

[0056] (4) Reaction device 4: The molten material at 420°C reacts spontaneously in the reaction device 4 while...

Embodiment 2

[0065] The same system and operation mode as in Example 1 were used, except that in the reaction device 4, the height was 7, the cross-sectional diameter was 0.5, and the aspect ratio was 14. The residence time of the material in the reaction device 4 is 9 hours by controlling the liquid level.

[0066] Obtain the solid product at the outlet of the output packaging device 6, denoted as A2.

Embodiment 3

[0068] The same system and operation mode as in Example 1 were adopted, except that in the reaction device 4, the height was 10, the cross-sectional diameter was 1.5, and the aspect ratio was 6.7. The residence time of the material in the reaction device 4 is 12 hours by controlling the liquid level.

[0069] Obtain the solid product at the outlet of the output packaging device 6, denoted as A3.

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Abstract

The invention relates to the field of production of mesophase pitch, in particular to a system and a method for continuously producing mesophase pitch. The system comprises a feeding device and a reaction device which are connected in sequence, wherein the feeding device is used for melting raw materials and heating the raw materials to a reaction temperature, and the reaction device is used for converting the materials from the feeding device into mesophase pitch in a free downward flowing mode under a non-stirring condition; the reaction device is a cylindrical container with a height-diameter ratio of greater than 3; the reaction device comprises a liquid material inlet located in the upper part of the reaction device, and a liquid material outlet is located in the bottom of the reaction device; and a stirring part and a filler are not arranged in the reaction device. The system and the method provided by the invention can further improve the uniformity of an obtained mesophase pitch product and the content of the mesophase pitch on the premise of ensuring good comprehensive performance of the obtained mesophase pitch product.

Description

technical field [0001] The invention relates to the production field of mesophase pitch, in particular to a system for continuously producing mesophase pitch and a method for continuously producing mesophase pitch using the system. Background technique [0002] The pitch mesophase is a mixture of a variety of flat disk-shaped condensed ring aromatic hydrocarbons with a relative molecular mass of 370-2000, also known as liquid crystal phase pitch. Generally, if a substance exists in a crystal state, it will show optical anisotropy, and if it exists in a liquid state, it will show optical isotropy; however, there is a class of substances that show a kind of The state of optically anisotropic turbid fluid is not only a liquid form but also has the characteristics of crystal optical anisotropy. It is called liquid crystal in crystallography and mesophase in phase science. [0003] CN108219813A discloses mesophase pitch and its continuous production method and system. The system...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10C3/00C10C3/10C10C3/14C10C3/18
CPCC10C3/00C10C3/002C10C3/10C10C3/14C10C3/18
Inventor 魏建明张胜振朱豫飞刘均庆王珂梁文斌
Owner CHNA ENERGY INVESTMENT CORP LTD
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