Raw material pretreatment solvent extraction system and method for needle coke industrial production

A needle coke and pretreatment technology, which is applied in the process of selective solvent extraction tar processing and multi-stage series refining process treatment, etc., can solve the problem of complex actual operation of the process, high content of quinoline insolubles, and short service life of equipment. and other problems, to achieve the effect of simple operation process, reduction of quinoline insoluble content, and stable operation of equipment

Active Publication Date: 2018-08-14
山西宏特煤化工有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problems of the existing needle coke industrial production raw material pretreatment solvent extraction system, the relatively high content of quinoline insolubles in the needle coke raw material obtained, the actual operation of the process is complicated, the operation is not stable, and the equipment is not easy to use. Short life, low and unstable product quality and other technical problems, provide a raw material pretreatment solvent extraction system and method for industrial production of needle coke

Method used

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  • Raw material pretreatment solvent extraction system and method for needle coke industrial production
  • Raw material pretreatment solvent extraction system and method for needle coke industrial production
  • Raw material pretreatment solvent extraction system and method for needle coke industrial production

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Embodiment 1

[0029] Such as figure 1 As shown, the raw material pretreatment solvent extraction system for needle coke industrial production in this embodiment includes a raw material buffer tank 1, a raw material oil pump 2, a first extractor 3A, a second extractor 3B, and a first asphalt solution pump 4 , primary mixer 5, secondary mixer 6, tertiary mixer 7, deasphalted oil solution pump 8, deasphalted oil stripper 9, deasphalted oil solution heating furnace 10, deoiled asphalt stripper Tower 11, deasphalted oil pump 12, deasphalted oil solution-deasphalted oil heat exchanger 13, deasphalted oil cooler 14, second asphalt solution pump 17, deoiled asphalt solution heating furnace 18, deoiled asphalt pump 19, deasphalted oil Oil asphalt solution-deoiled asphalt heat exchanger 20, deoiled asphalt cooler 21, first solvent tank 22, second solvent tank 23, deasphalted oil solution-solvent heat exchanger 24, first solvent aftercooler 25, Mixed solvent tank 26, mixed solvent pump 27, deoiled as...

Embodiment 2

[0059] The principle of this embodiment is the same as that of Embodiment 1, and the following content only introduces the differences between this embodiment and Embodiment 1.

[0060] In this embodiment, in step 1, the temperature of the soft asphalt entering the raw material buffer tank 1 from the raw material tank of the oil depot is 130°C, and the ratio of the mixed solvent entering from the mixed solvent tank 26 to the soft asphalt is 1:0.5;

[0061] In step 2, the deasphalted oil solution from the deasphalted oil solution outlet on the top of the second extractor 3B enters the deasphalted oil solution-solvent heat exchanger 24 through the deasphalted oil solution pump 8, and the deasphalted oil solution-solvent In the heat exchanger 24, the deasphalted oil solvent coming out of the deasphalted oil solvent outlet at the top of the deasphalted oil stripper 9 is heat-exchanged to 130° C. and then enters the deasphalted oil solution-deasphalted oil heat exchanger 13, and Th...

Embodiment 3

[0067] The principle of this embodiment is the same as that of Embodiment 1, and the following content only introduces the differences between this embodiment and Embodiment 1.

[0068] In this embodiment, in step 1, the temperature of the soft asphalt entering the raw material buffer tank 1 from the raw material tank of the oil depot is 160°C, and the ratio of the mixed solvent entering from the mixed solvent tank 26 to the soft asphalt is 1:2;

[0069] In step 2, the deasphalted oil solution from the deasphalted oil solution outlet on the top of the second extractor 3B enters the deasphalted oil solution-solvent heat exchanger 24 through the deasphalted oil solution pump 8, and the deasphalted oil solution-solvent In the heat exchanger 24, the deasphalted oil solvent that comes out of the deasphalted oil solvent outlet at the top of the deasphalted oil stripping tower 9 is heat-exchanged to 180° C. and then enters the deasphalted oil solution-deasphalted oil heat exchanger 13...

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Abstract

The invention provides a raw material pretreatment solvent extraction system and method for needle coke industrial production, and belongs to the field of needle coke production. The extraction systemcomprises a first extracter, a second extracter, a deasphalted oil stripping tower, a deasphalted oil solution heating furnace, a deoiled asphalt stripping tower, a deoiled asphalt solution heating furnace and the like. Needle coke raw materials needing to be pretreated are continuously extracted by a two-furnace two-tower way and two extracters as main devices; an aromatic hydrocarbon and aliphatic hydrocarbon mixed solvent is selected to be continuously extracted together with maltha in the two extracters, the maltha is divided into light phase oil and heavy phase oil by the mixed solvent,and settling separation in the two extracters are conducted by using proportion difference between the light phase and the heavy phase, so that impurities such as quinoline insolubles in maltha are separated from the heavy phase oil; and by using a distillation and stripping principle, the solvents in the light phase oil and the heavy phase oil are recovered and recycled by a one-furnace and one-tower process, high-quality deasphalted oil is obtained in the light phase oil, and deoiled asphalt byproducts are obtained in the heavy phase oil.

Description

technical field [0001] The invention relates to the technical field of needle coke production, in particular to a raw material pretreatment solvent extraction system and method for industrial production of needle coke. Background technique [0002] At present, domestic needle coke is the main raw material for the production of ultra-high power (UHP) graphite electrodes for steelmaking, and battery anode materials for electric vehicles. Because needle coke has good graphitization properties and its uses are increasing day by day, the consumption of needle coke is also increasing, and there are often shortages in the international and domestic markets. Needle coke production includes three stages: raw material pretreatment, delayed coking and calcination. Raw material pretreatment is a key stage of needle coke production. Under the condition of certain delayed coking conditions, the better the quality of the needle coke raw material (deasphalted oil) produced in the raw mater...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G53/06C10C1/18
CPCC10C1/18C10G53/06
Inventor 吴连生刘光武
Owner 山西宏特煤化工有限公司
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