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Production method of needle coke

A production method and needle coke technology, which are applied in coke ovens, coking carbonaceous materials, petroleum industry, etc., can solve the problems of high cost and large investment, and achieve the effects of low cost, expansion of sources and simple process.

Active Publication Date: 2010-06-09
CHINA PETROLEUM & CHEM CORP +1
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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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  • Production method of needle coke
  • Production method of needle coke
  • Production method of needle coke

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-5

[0034] In the embodiment, all experiments use the same raw material oil, aiming to compare the effects under different operating conditions. The properties of conventional coking feedstock oil and FCC slurry used in the experiment are shown in Table 1, and the experimental conditions and results are shown in Table 2.

[0035] The raw material oil property that the embodiment of table 1 adopts

[0036] raw material

FCC slurry

Conventional Coker Raw Oil

Density(20℃) / kg·m -3

1.0058

0.998

Viscosity(100℃) / mm 2 ·s 1

10.00

700

Freezing point / ℃

34

50

Carbon residue, % (mass fraction)

7.10

16.2

Ash content, % (mass fraction)

0.372

0.06

S, % (mass fraction)

0.53

0.55

N / μg·g -1

4678

8841

C，％

88.44

87.36

H, % (mass fraction)

8.90

11.21

Four components, % (mass fraction)

Saturation

32.1 ...

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Abstract

The invention discloses a method for producing needle coke by adopting the technique combining delay coking and kettle-type coking. The method comprises: when treating the conventional coking raw material by using the delay coking technique, introducing FCC slurry oil into a delay coking tower from the upper part inside the tower at the low temperature, and obtaining needle coke raw material by fractionating high temperature oil gas obtained by the reaction; and then, treating the needle coke raw material by using the kettle-type coking technique, and obtaining high quality needle coke. In the method, as the FCC slurry oil is injected into the coking tower at the lower temperature, the decomposition temperature of the conventional coking raw material is lowered, the high temperature decomposition time of the raw material is shortened, the occurrence of secondary reaction is reduced, green coke rate is reduced, the stable operation cycle of a signal tower is prolonged, and light components which have high reaction activity and are not beneficial to producing the needle coke, heavy components with high polymerization activity, and a great deal of impurities such as catalyst powder, heavy metal and the like can be removed. The obtained needle coke has high yield and good quality.

Description

technical field [0001] The invention belongs to a process method for producing needle coke. Specifically, it is a method of producing needle coke and light distillate oil and coke at the same time by coking combined 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 content of linearly connected tricyclic and tetracyclic short side chain aromatic hydrocarbons is mostly, and generally requires that the content of aromatic hydrocarbons reach 30-50%; colloids and colloids The content of asphaltene is low. Colloids and asphaltenes are hydrocarbon compounds with macromolecule condensed rings or long side chains...

Claims

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Application Information

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IPC IPC(8): C10B55/00
Inventor 张学萍任翠霞初人庆勾连忠郑庆华石岩高翔朱文权
Owner CHINA PETROLEUM & CHEM CORP
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