Method for the retarded coking of petroleum residues

A delayed coking method and residual oil technology, applied in coking carbonaceous materials, cracking, coking ovens, etc., can solve the problems of uncontrollable light oil quantity and quality, carburization, shortening the interval time of delayed coking units, etc.

Inactive Publication Date: 2014-05-21
普诺米泰克股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] This method has the disadvantage that in the case of foam transfer from the coking chamber, the liquid at the bottom of the rectification column may contain coke particles deposited on the mass exchange equipment of the evaporator, impairing the operation of the unit, coke particles in the furnace and the two Mixing of secondary raw materials leads to carburization, thereby reducing the time between required overhauls of the delayed coker
This method cannot control the quantity and quality of light oil obtained from the unit

Method used

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  • Method for the retarded coking of petroleum residues
  • Method for the retarded coking of petroleum residues
  • Method for the retarded coking of petroleum residues

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Example 1 (prototype based)

[0025] In industrial units, the coking feedstock, whose characteristics are listed in Table 1. The raw material is heated to 270°C in the heat exchanger and then sent to the bottom of the evaporator. In the upper part of the evaporator, the bottom liquid from the main rectification column is used as a recycle, and its amount is 10% of the raw material amount. The secondary raw material formed in this way in the evaporator is heated to 500°C in the furnace and sent to the carbonization chamber for coking. Coking products in the carbonization chamber enter the lower part of the main rectification tower through the top gas pipeline of the rectification tower. The coking product with the highest boiling point is condensed in the top mass exchange device in the lower part of the rectification tower, and the cold heavy coking gas oil is used as the reflux medium in the lower part, and the dosage is 10% of the raw material. All concentrated hig...

Embodiment 2

[0027] Embodiment 2 (according to the method proposed by the present invention).

[0028]According to the accompanying drawings, the characteristics of coker oil raw materials are shown in Table 1. The feedstock is heated to 270°C in heat exchange and then sent to the evaporator where heavy coker gas oil is provided as recycle in the top tray of the evaporator, which is used in an amount of 10% of the feedstock. The secondary raw material obtained at the bottom of the evaporator is heated to 500°C in the furnace, and then transported to the carbonization chamber for coking. The coked product is sent to the bottom of the rectification column through the upper pipeline. In order to adjust the final boiling point of the heavy coker gas oil separated from the device, the cooled heavy gas oil is provided as the lower reflux medium, and its consumption is 10% of the raw material, which is transported into the first mass exchange device at the bottom of the rectification tower. In ...

Embodiment 3

[0033] Embodiment 3 (method proposed according to the present invention)

[0034] Under this example, the aim is to increase the yield of heavy gas oil relative to Example 2, wherein the quality of this heavy gas oil can be used as a feedstock for hydrocracking.

[0035] To achieve this purpose, similar to Example 2, coking the raw material, but reducing the amount of heavy gas oil entering the mass exchange device at the bottom of the rectification tower as reflux to 5% volume content, and supplying the mass exchange device at the top of the rectification tower The amount of light gas oil is the same as in Example 2.

[0036] The coking results are shown in Table 2.

[0037] It can be seen from Example 3 that, compared with Example 2, the reduction in the amount of the lower reflux medium (i.e., the reflux medium supplied to the first mass exchange device at the bottom of the rectification column) results in the supplied heavy coking gas being formed from the fraction in We...

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Abstract

The invention relates to the oil-refining industry, in particular to the process of delayed coking with the purpose of obtaining oil coke and gas oil fractions. The exploitation of many delayed coking installations, particularly in the reprocessing of oil residues, from which coke with high sulfur content is obtained in the process of coking, is oriented to obtaining the maximum possible quantity of distillated fractions: gasoline, light and heavy coking gas oil. Further on, high quality motor fuels are produced from the obtained distillates by using hydro-catalytic processes - hydraulic cleaning, catalytic cracking, and hydrocracking.

Description

technical field [0001] The invention relates to petroleum refining, in particular to obtaining petroleum coke and gas oil fractions through a delayed coking process. Background technique [0002] Development of a variety of delayed coking units, especially for the aftertreatment of residual oil, in which coke with a high sulfur content is obtained, obtaining as many fractions as possible: gasoline, light gas oil and heavy gas oil. In addition, the resulting fractions are subjected to hydrocatalytic processes, namely hydraulic cleaning, catalytic cracking, and hydrocracking to produce high-quality fuels. The coking product thus obtained must meet certain quality requirements. Coked gasoline (the initial boiling point of the fraction is 180°C) is hydraulically cleaned, and then modified to obtain high-octane commercial gasoline. Light coking gas oil (initial boiling point at 180-350°C) is hydraulically washed to obtain diesel oil. This is why it is necessary to take into ac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10B55/00
CPCC10B55/00C10B57/045C10G9/005C10G2400/02C10B23/00
Inventor 杰那迪·乔基维奇·瓦亚维维克托·派洛维奇·赞坡林塞奇·维特维奇·苏科夫米哈伊尔·弗拉基米尔维奇·玛梅夫伊戈尔·维克托诺维奇·彼迪洛康斯坦汀·基纳德维奇·维尔亚文
Owner 普诺米泰克股份有限公司
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