Method for producing needle-shaped coke raw material by delayed coking process

A needle coke raw material and delayed coking technology, which is applied in the coking of carbonaceous materials, coke ovens, petroleum industry, etc., can solve the problems of high cost and large investment, and achieve the effects of low cost, expanded sources and easy to master.

Inactive Publication Date: 2017-06-20
LIAONING UNIVERSITY OF PETROLEUM AND CHEMICAL TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method requires a separate vacuum distillation device, and the distilled fractions need to be further hydrotreated, and the hydrotreated oil needs to be further separated. The cost of hydrogenation itself is high and the investment is large.

Method used

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  • Method for producing needle-shaped coke raw material by delayed coking process
  • Method for producing needle-shaped coke raw material by delayed coking process
  • Method for producing needle-shaped coke raw material by delayed coking process

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Effect test

Embodiment 1

[0033] The following combination figure 1 and specific examples are explained in further detail, but the present invention is not limited by the examples.

[0034] like figure 1 Shown, a kind of method utilizing delayed coking technology to produce needle coke raw material, comprises the steps:

[0035](1) The conventional coking raw material is heated to 540°C by the heating furnace, and the furnace outlet temperature is controlled to 485°C, and enters the delayed coking tower from the bottom of the delayed coking tower; the FCC circulating oil enters the heating furnace through the coking raw material oil pipeline 12 from the bottom of the fractionating tower 1. After heating to 420°C, it enters the feed line 14 at the upper part of the coking tower, and enters the delayed coking tower 3 from the middle and upper part of the delayed coking tower 3; it contacts with the high-temperature oil and gas generated by the reaction of conventional coking raw materials entering from ...

Embodiment 2

[0048] The difference between this embodiment and embodiment 1 is:

[0049] (1) The conventional coking raw material is heated to 550°C by the heating furnace, and the furnace outlet temperature is controlled at 500°C, and enters the delayed coking tower from the bottom of the delayed coking tower; the FCC circulating oil enters the heating furnace through the coking raw material oil pipeline 12 from the bottom of the fractionating tower 1. Heating to 400°C, entering the feed line 14 at the upper part of the coking tower, and entering the delayed coking tower 3 from the middle and upper part of the delayed coking tower 3;

[0050] The initial boiling point of the needle coke raw material is 380°C, and the final boiling point is 460°C.

[0051] The outlet temperature of the FCC circulating oil heating furnace is 100°C lower than the outlet temperature of the conventional coking raw material heating furnace.

[0052] The feed weight ratio of the FCC cycle oil to conventional co...

Embodiment 3

[0054] The difference between this embodiment and embodiment 1 is:

[0055] (1) The conventional coking raw material is heated to 545°C by the heating furnace, and the furnace outlet temperature is controlled to 495°C, and enters the delayed coking tower from the bottom of the delayed coking tower; the FCC circulating oil enters the heating furnace through the coking raw material oil pipeline 12 from the bottom of the fractionating tower 1. After heating to 410°C, enter the delayed coking tower 3 from the middle and upper part of the delayed coking tower 3 through the feed line 14 at the upper part of the coking tower;

[0056] The initial boiling point of the needle coke raw material is 360°C, and the final boiling point is 450°C.

[0057] The feed weight ratio of the FCC cycle oil to conventional coking raw materials is 50:50.

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Abstract

The invention discloses a method for producing a needle-shaped coke raw material through treating FCC circulating oil and a conventional coked raw material by a delayed coking process. The method comprises the steps: low temperature FCC circulating oil is introduced to a medium-upper part of a delayed coking tower and makes contact with a high temperature oil gas phase produced from high temperature cracking of the conventional coked raw material introduced from the bottom of the delayed coking tower, a reaction is performed under delayed coking conditions, generated oil and gas enter a coking fractionating tower and are separated, and thus the needle-shaped coke raw material is obtained. An ultrasonic generator is mounted at the bottom of the coking fractionating tower, the ultrasonic wave cavitation principle is utilized, and the fractionation effect is improved, so the wax oil distilling-off rate is improved, and the high-quality high-yield needle-shaped coke raw material is obtained.

Description

technical field [0001] The invention belongs to a process method for producing needle coke raw materials. Specifically, it is a method of producing needle coke raw materials and simultaneously producing light distillate oil and coke by using a delayed coking process. Background technique [0002] Needle coke is the main raw material for producing high-power and ultra-high-power graphite electrodes. The most critical issues in the production of needle coke are the selection and pretreatment of raw materials. According to the coke formation mechanism of needle coke, the raw materials for producing needle coke must meet the requirements of high aromatic content, among which the three-ring and four-ring short side chain aromatics content of linear connection are mostly, and generally require the content of aromatics to reach 30%-50%; colloid Colloids and asphaltenes are low in content of asphaltenes. Colloids and asphaltenes are hydrocarbon compounds with macromolecular conden...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10B57/08C10B55/00
CPCC10B57/08C10B55/00
Inventor 王翀赵德智宋官龙戴咏川王德慧丁巍刘美
Owner LIAONING UNIVERSITY OF PETROLEUM AND CHEMICAL TECHNOLOGY
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