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Process for delayed coking of whole crude oil

一种延迟焦化方法、延迟焦化的技术，应用在延迟焦化全馏分原油领域，能够解决基建成本运行成本增加等问题

Inactive Publication Date: 2014-03-19
SAUDI ARABIAN OIL CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] There is a problem in utilizing the coking unit in the refining process because of the need to use the feed stream as a product of atmospheric and / or vacuum distillation, which would require the construction of new distillation facilities for this purpose, or the need to increase the capacity of existing facilities. capacity, both options will result in increased capital and / or operating costs

Method used

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  • Process for delayed coking of whole crude oil
  • Process for delayed coking of whole crude oil
  • Process for delayed coking of whole crude oil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0061] The coking method model commonly used in industry is improved to reflect the presence of light components and the corresponding yield based on the middle boiling temperature of the respective fractions. The model also includes experimental data on feed flow characteristics.

[0062] Table 1 lists Arabian heavy crude oil feed streams, their properties and composition, where CRR is the Conradson carbon residue value as a weight percentage of the starting material, and IBP and FBP are the initial and final boiling points, respectively.

[0063] Table 1

[0064] Performance

[0065] The feed stream was subjected to delayed coking at a temperature of 496°C at the furnace outlet and atmospheric pressure. The structure of the delayed coking unit is as follows image 3 Shown. The yield of the coking unit is summarized in Table 2.

[0066] Table 2

[0067] Yield

[0068] As shown in the data in Table 2, the full-distilled crude oil feed stream can be processed in the coking unit...

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Abstract

An improved delayed coking process utilizing a coking unit and a coking unit product fractionating column which includes the steps of: heating a mixture of a fresh whole crude oil feedstream and the bottoms from the coking unit product fractionator in a furnace to a coking temperature in the range of 480 DEG C to 530 DEG C / 896 DEG F to 986 DEG F; introducing the heated mixed whole crude oil and bottoms feedstream directly into the delayed coking unit; optionally passing the vaporized liquid and gaseous coking unit product stream into a flash unit; recovering a light product gas stream that includes H2S, NH3 and CI to C4 hydrocarbons from the flash unit; transferring the bottoms from the flash unit to the coking unit product fractionating column; recovering as separate side streams from the fractionating column naphtha, light gas oil and heavy gas oil; recycling a portion of the heavy gas oil by introducing it into the fractionating column optionally with the bottoms from the flash unit; mixing the fractionating column bottoms with the whole crude oil feedstream to form the mixed feedstream; and introducing the mixed whole crude oil and fractionating column bottoms feedstream into the furnace.

Description

Invention field [0001] The invention relates to a method for delaying coking of full-fraction crude oil. Background of the invention [0002] Delayed coking is a thermal cracking method that is used in oil refineries to upgrade and convert petroleum residues (which are typically the bottom product of atmospheric and vacuum distillation from crude oil) into liquid and gaseous product streams, leaving behind Petroleum coke as a solid concentrated carbon material. A flame heater or furnace (such as a horizontal tube furnace) is used in the method to reach a thermal cracking temperature of 485°C-505°C / 905°F-941°F. Due to the short residence time in the furnace tube, the coking of the feed material is "delayed" until it is discharged into the large coking tank downstream of the heater. [0003] In the practice of the delayed coking process, the hydrocarbon oil is heated to the coking temperature in a furnace or other heating device, and the heated oil is introduced into the coking tan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10B55/00C10B57/04C10B57/06C10G9/00
CPCC10G2300/1033C10G9/005C10B57/045C10G2300/4081C10G31/08C10G2400/06C10G2400/02C10G11/02C10B57/06C10B55/00C10G2300/301C10G55/06C10G2300/4006C10G55/04C10B57/04C10G9/00
Inventor O·R·克塞奥格卢
Owner SAUDI ARABIAN OIL CO
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