Delayed coking production method utilizing ethylene cracking tar as raw material

A technology of ethylene cracking and delayed coking, which is applied in cracking, non-catalytic thermal cracking, petroleum industry, etc., to achieve the effect of increasing coke yield and comprehensive utilization rate

Inactive Publication Date: 2009-12-23
PETROCHINA CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to develop a delayed coking production method using ethylene cracking tar mixed with other raw materials as raw materials for delayed coking production, to solve the problem of comprehensive utilization of ethylene cracking tar and to increase the added value of products

Method used

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  • Delayed coking production method utilizing ethylene cracking tar as raw material
  • Delayed coking production method utilizing ethylene cracking tar as raw material
  • Delayed coking production method utilizing ethylene cracking tar as raw material

Examples

Experimental program
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Effect test

Embodiment 1

[0016] Mixed raw material plan for blending 5% ethylene pyrolysis tar: the delayed coking mixed raw material is composed of Daqing ethylene pyrolysis tar, Daqing vacuum residue and Daqing catalytic oil slurry, and the weight ratio is 1:17:2, that is, ethylene pyrolysis tar accounts for 5%. , Vacuum residual oil accounts for 85%, and catalytic oil slurry accounts for 10%. During the experiment, 15ppm (accounting for feed) YJ-01 defoamer was injected into the top of the coke tower.

[0017] Through the analysis of the mixed raw materials of ethylene cracking tar, vacuum residue and catalytic oil slurry, the evaluation of mixed raw materials with different blending ratios was carried out in the delayed coking experimental device. The feed rate of the delayed coking device was 3kg / h, and the reaction pressure 0.16MPa (table), reaction temperature 500°C, circulation ratio 0.35, raw material properties of different raw material mixing schemes are shown in Table 1, main product gasol...

Embodiment 2

[0019] Mixed raw material plan for blending 10% ethylene cracking tar: the delayed coking mixed raw material is composed of Daqing ethylene cracking tar, Daqing vacuum residue and Daqing catalytic oil slurry, and the weight ratio is 1:8:1, that is, ethylene cracking tar accounts for 10%. , Vacuum residual oil accounts for 80%, and catalytic oil slurry accounts for 10%. During the experiment, 15ppm (accounting for feed) YJ-01 defoamer was injected into the top of the coke tower

[0020] Through the analysis of the mixed raw materials of ethylene cracking tar, vacuum residue and catalytic oil slurry, the evaluation of mixed raw materials with different blending ratios was carried out in the delayed coking experimental device. The feed rate of the delayed coking device was 3kg / h, and the reaction pressure 0.16MPa (table), reaction temperature 500°C, circulation ratio 0.35, raw material properties of different raw material mixing schemes are shown in Table 1, main product gasoline...

Embodiment 3

[0022] Mixed raw material plan for blending 15% ethylene cracking tar: the delayed coking mixed raw material is composed of Daqing ethylene cracking tar, Daqing vacuum residue and Daqing catalytic oil slurry, with a weight ratio of 1:5:0.67, that is, ethylene cracking tar accounts for 15% , Vacuum residual oil accounted for 75%, catalytic oil slurry accounted for 10%. During the experiment, 15ppm (accounting for feed) YJ-01 defoamer was injected into the top of the coke tower

[0023] Through the analysis of the mixed raw materials of ethylene cracking tar, vacuum residue and catalytic oil slurry, the evaluation of mixed raw materials with different blending ratios was carried out in the delayed coking experimental device. The feed rate of the delayed coking device was 3kg / h, and the reaction pressure 0.16MPa (table), reaction temperature 500°C, circulation ratio 0.35, raw material properties of different raw material mixing schemes are shown in Table 1, main product gasoline ...

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Abstract

The invention relates to a delayed coking production method utilizing ethylene cracking tar as a raw material. A delayed coking mixed raw material is formed by the ethylene cracking tar, vacuum residue and catalytic oil slurry according to the weight proportion of 1:1-100:0-10; a defoaming agent which accounts for 10 to 100 ppm of feeding weight is injected into the top of a coking tower; the feeding rate of a delayed coking device is between 1 and 10 kg / h; the temperature of a preheating section is between 360 and 380 DEG C; the reaction pressure of the top of the coking tower is between 0.1 and 0.3 MPa (meter); the reaction temperature is between 490 and 510 DEG C; and the recycle ratio is between 0.15 and 0.55. The method extends the source and variety of raw materials of delayed coking, ensures that the sulfur content and the nitrogen content of gasoline and kerosene produced by the delayed coking device are reduced, the sulfur content and the metal content of wax oil and coke are reduced, the yield is not affected, the yield of the coke is increased, and any adverse effect on the process operation of the delayed coking device cannot be produced.

Description

technical field [0001] The invention relates to a delayed coking production method using ethylene cracking tar as raw material. Background technique [0002] Ethylene pyrolysis tar (called ethylene pyrolysis fuel oil in some countries and regions) is a by-product in the ethylene production process, and its output accounts for about one-fifth of the raw material. The composition of ethylene pyrolysis tar is very complex, mainly including alkanes, C 8 ~C 15 aromatic hydrocarbons, aromatic olefins and heterocyclic compounds, etc. Fractions of pyrolysis tar before 350°C are various hydrocarbons, accounting for about 30-40% of the raw material, also known as light fuel oil; fractions after 350°C are tar pitch, which are mainly black solids at room temperature, accounting for about 30% of the raw material. 60-70% of raw materials. Tar pitch is an extremely complex mixture composed of polymer hydrocarbons. It is mainly composed of polycyclic aromatic hydrocarbons with more than...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G9/00
Inventor 张浩齐泮仑西晓丽何玉莲王熺于宏伟缪春祥李维斌郭立艳赵光辉关旭董平宋国玉李洪涛王巍张德英王路海田然
Owner PETROCHINA CO LTD
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