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Device and method for preparing petroleum coke from raw oil with high metal content

A raw material oil and high metal technology, applied in the petroleum industry, coking carbonaceous materials, coke ovens, etc., can solve the problems of poor metal removal effect, corrosion of production equipment, and increased processing difficulty, so as to improve the yield of petroleum coke, The effect of low equipment cost and improved utilization

Inactive Publication Date: 2020-07-14
CHINA NAT OFFSHORE OIL CORP +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] For the treatment of raw oil with high metal content, there are currently two main processes, one is the electric desalination operation, but based on the existence of metals in the oil, the metal removal effect is poor, and it will cause corrosion and other problems to the production equipment. The second is to increase the residual oil hydrogenation process before the delayed coking process to remove the metal impurities in the raw material, but it will cause a sharp increase in processing costs and an increase in the difficulty of subsequent treatment. Therefore, for raw oil with high metal content It is also necessary to find new methods to reduce the difficulty of removing metal components in order to obtain high-quality petroleum coke

Method used

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  • Device and method for preparing petroleum coke from raw oil with high metal content
  • Device and method for preparing petroleum coke from raw oil with high metal content
  • Device and method for preparing petroleum coke from raw oil with high metal content

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Experimental program
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Effect test

Embodiment 1

[0069] This embodiment provides a device for preparing petroleum coke from raw material oil with high metal content, the structural diagram of the device is as follows figure 1 As shown, it includes a primary coking unit, a secondary coking unit and a fractionation unit, the top outlet of the primary coking unit is connected to the inlet of the secondary coking unit, and the top outlet of the secondary coking unit is connected to the inlet of the fractionation unit , the bottom outlet of the fractionation unit is connected to the inlet of the secondary coking unit;

[0070] Each coking unit includes a preheating device and a coke tower, and the outlet of the preheating device is connected with the inlet of the coke tower.

[0071] The primary coking unit includes a first preheating device 1 and a first coke drum 2, the secondary coking unit includes a second preheating device 3 and a second coke drum 4, and the top outlet of the first coke drum 2 It is connected with the inle...

Embodiment 2

[0075] The present embodiment provides a kind of method for preparing petroleum coke by high metal content stock oil, described method adopts the device among the embodiment 1 to carry out, comprises the following steps:

[0076] (1) Preheat the atmospheric residual oil raw material with a metal content of 513.4ppm to 420°C, enter the first coke tower 2 for mild thermal cracking, the reaction pressure in the first coke tower 2 is 0.5MPa, and the residence time is 12h, to obtain Coke and primary coke oil and gas, the metal components are enriched in the coke;

[0077] (2) The first-stage coking oil gas obtained in step (1) is heated to 490°C in the second heating furnace, and enters the second coke tower 4 for cracking coke generation reaction. The reaction pressure in the second coke tower 4 is 0.1MPa, and the residence time 24h, the circulation ratio is 0.1, high-quality petroleum coke and secondary coking oil and gas are obtained;

[0078] (3) Fractionate the secondary coke...

Embodiment 3

[0080] The present embodiment provides a kind of method for preparing petroleum coke by high metal content stock oil, described method adopts the device among the embodiment 1 to carry out, comprises the following steps:

[0081] (1) Preheat the vacuum residue raw material with a metal content of 745.1ppm to 450°C, enter the first coke tower 2 for mild thermal cracking, the reaction pressure in the first coke tower 2 is 0.2MPa, and the residence time is 3h, note The amount of water accounts for 5wt% of the mass of the raw oil to obtain coke and primary coked oil gas, and the metal components are enriched in the coke;

[0082] (2) The first-stage coking oil gas obtained in step (1) is heated to 505°C in the second heating furnace, and enters the second coke tower 4 for cracking coke generation reaction. The reaction pressure in the second coke tower 4 is 0.15MPa, and the residence time 18h, the circulation ratio is 0.5, and the water injection amount accounts for 10wt% of the f...

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Abstract

The invention provides a device and a method for preparing petroleum coke from raw oil with high metal content. The device comprises a first-stage coking unit, a second-stage coking unit and a fractionation unit, the top outlet of the first-stage coking unit is connected with the inlet of the second-stage coking unit, the top outlet of the second-stage coking unit is connected with the inlet of the fractionation unit, and the bottom outlet of the fractionation unit is connected with the inlet of the second-stage coking unit; each stage of coking unit comprises a preheating device and a coke tower, and the outlet of the preheating device is connected with the inlet of the coke tower. Raw oil with high metal content is used as a raw material, two stages of coking units are arranged, decomposition and removal are carried out by utilizing the chemical characteristics of metal components in the raw oil according to the existence form of the metal components in the raw oil, and high-qualitypetroleum coke meeting the technical requirements is prepared; and the device is simple in structure and low in equipment cost, the method is easy and convenient to operate and good in adaptability toraw materials, the operation flexibility of production enterprises is expanded, economic benefits are improved, and the device is suitable for large-scale application.

Description

technical field [0001] The invention belongs to the technical field of petroleum coking, and relates to a device and a method for preparing petroleum coke from raw oil with high metal content. Background technique [0002] Petroleum is an important fossil energy, and various products prepared from it are widely used in many fields. Petroleum coke, as a petroleum product, includes ordinary petroleum coke, needle-shaped petroleum coke, etc., and is commonly used in steelmaking It is the main raw material for power graphite electrodes or prebaked anodes for electrolytic aluminum. However, there are not many enterprises that can produce petroleum coke at present, which leads to its high cost and limits its application in steelmaking and electrolytic aluminum industries. [0003] At present, the main factor affecting the quality of petroleum coke is the high metal content in the raw materials of the delayed coking unit, which leads to the fact that the metal content in the petrol...

Claims

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Application Information

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IPC IPC(8): C10B55/00C10B57/02C10G7/00
CPCC10B55/00C10B57/02C10G7/00
Inventor 王志超蔡烈奎裴晓光王伟王衍法
Owner CHINA NAT OFFSHORE OIL CORP