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Mesophase pitch, and continuous production method and system thereof

A technology of mesophase pitch and production system, which is applied in chemical instruments and methods, processing of tar pitch/petroleum pitch/natural pitch, melting and processing of tar pitch/petroleum pitch/natural pitch, etc., can solve the problem of high level of automation and achieve The effect of improved automation level, high labor efficiency, and reduced equipment investment

Active Publication Date: 2018-06-29
CHNA ENERGY INVESTMENT CORP LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a continuous production system and method for mesophase pitch in order to overcome the existing problems in the prior art. The composition of the continuous production system for mesophase pitch provided by the present invention is simplified, and the production of mesophase pitch can be carried out continuously. Coking is not easy to occur in the production process, and the automation level is high

Method used

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  • Mesophase pitch, and continuous production method and system thereof
  • Mesophase pitch, and continuous production method and system thereof

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Embodiment approach

[0035] In the prior art, the asphalt is usually transported to the reaction kettle through high standard deviation for reaction, but the inventors of the present invention found that the method with high standard deviation easily leads to the pressure imbalance of the reactor parts at all levels, and the asphalt The degree of evaporation in the reactors at all levels is different. When the amount of evaporation is small, the gas phase pressure is small, and vice versa, and it changes continuously with the progress of the production process. Therefore, it will lead to the evacuation of some reactors and the occurrence of asphalt clogging. Phenomenon. The inventors of the present invention have found through research that by disposing the power supply unit 16 between the discharge port of the asphalt heating unit 72 and the feed port of the asphalt polymerization reaction system 8, the asphalt that reaches a predetermined reaction temperature can be transported. To the feed port...

Embodiment 1

[0068] This embodiment is used to illustrate the continuous production system and process of mesophase pitch provided by the present invention.

[0069] Mesophase pitch continuous production system: such as figure 1 As shown, the asphalt polymerization reaction system includes four-stage reactors set in series (the height of the reactor is 3m, the diameter of ф1m, and a built-in blade stirrer) and the first-stage spare reactor.

[0070]The continuous production method of mesophase asphalt: after the aforementioned asphalt raw material is screened by the screening device 1, it enters the asphalt raw material warehouse 4 through the belt conveyor 2 and the bucket elevator 31, and then the raw materials located in the asphalt raw material warehouse are weighed. After the device 5 is weighed, it enters the crushing device for crushing (crushed to a particle size below 200 mesh), and the crushed raw materials are sequentially added to the first melting kettle 711 and the second mel...

Embodiment 2

[0074] This example is used to illustrate the continuous production system and process of mesophase pitch provided by the present invention.

[0075] The production of mesophase pitch was carried out using the mesophase pitch continuous production system of Example 1 and according to the mesophase pitch continuous production method, except that the above gear pump was not used to feed the pitch melt into a four-stage reaction including a series arrangement In the asphalt polymerization reaction system 8 of the tank, the asphalt melt is fed into the asphalt polymerization reaction system 8 including four-stage reaction tanks arranged in series through a high standard deviation, and the high standard deviation is 5m.

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Abstract

The invention relates to the field of mesophase pitch production, and discloses mesophase pitch, and a continuous production method and a continuous production system thereof. The system comprises a continuous heating feeding system (7) and a pitch polymerization reaction system (8) at downstream of the continuous heating feeding system (7); a discharging port of the continuous heating feeding system is connected with a feeding port of the pitch polymerization reaction system; the continuous heating feeding system comprises a pitch melting unit (71) and a pitch heating unit (72); the pitch polymerization reaction system comprises two to eight stages of reaction kettles which are connected in series and at least one stage of standby reaction kettle; the pitch heating unit comprises spaces for holding pitch and molten salt respectively. The method comprises the following steps: melting pitch; heating to a preset temperature to form pitch melt; adding the pitch melt into the pitch polymerization reaction system to perform contact reaction; heating the molten pitch through the molten salt, wherein the polymerization reaction system comprises two to eight stages of reaction kettles which are connected in series and at least one stage of standby reaction kettle. The produced mesophase pitch is high in quality controllability, uniform in softening point and high in stability; continuous production can be realized.

Description

technical field [0001] The present invention relates to the production field of mesophase pitch, in particular to a continuous production system of mesophase pitch, and the mesophase pitch produced by the method. Background technique [0002] Mesophase pitch is a pitch that contains a considerable amount of mesophase after heat treatment, and the mesophase pitch is a black amorphous solid at room temperature. The mesophase composition of mesophase pitch has the characteristics of optical anisotropy, and the mesophase is spherical in the early stage of formation, which is called mesophase spheroid. The density of mesophase pitch is 1.4-1.5g / cm 3 . Mesophase pitch is mainly used to prepare mesophase pitch carbon fibers, and can also be used to prepare needle coke, as well as the matrix material of carbon-carbon composite materials and the extraction of mesophase carbon microspheres. As a new material, mesophase pitch has broad development prospects, but the high cost of mes...

Claims

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Application Information

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IPC IPC(8): C10C3/00C10C3/10C10C3/02C10C3/14B01J19/18B01J4/00
CPCB01J4/001B01J19/1862B01J2204/002B01J2204/007C10C3/00C10C3/002C10C3/02C10C3/10C10C3/14
Inventor 闫学良刘均庆罗峰王珂梁文斌常彬杰矫卫东
Owner CHNA ENERGY INVESTMENT CORP LTD
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