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Method and system for producing ethylene unit raw material from residual oil

A technology for ethylene plant and raw material, which is applied in the field of raw material for producing ethylene plant from residual oil, can solve problems such as unmentioned properties of naphtha, and achieve the effects of low olefin content, moderate operating conditions, and reduced energy consumption

Active Publication Date: 2021-12-17
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The method is silent on the nature of the resulting naphtha and requires hydrogenated bio-oil to blend the residuum

Method used

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  • Method and system for producing ethylene unit raw material from residual oil

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Comparison scheme
Effect test

Embodiment 1

[0049] according to figure 1 The fixed-bed residual oil hydrogenation process is adopted, and the residual oil raw material A is used as the raw material oil (see Table 2 for properties). Among them, the operating conditions of the first separator are as follows: operating pressure 15.6MPa, operating temperature 380°C; operating conditions of the second separator are as follows: operating pressure 3.0MPa, operating temperature 370°C; operating conditions of the third separator are as follows: operating The pressure is 15.4MPa, the operating temperature is 42°C; the operating conditions of the fourth separator are as follows: the operating pressure is 2.8MPa, and the operating temperature is 40°C.

[0050] After the liquid phase IV of the fourth separator is mixed with the gas phase II material of the second separator, the temperature is 268°C, and it enters the hydrofining reactor. The reaction conditions are: reaction pressure 2.8MPa, liquid phase volume space velocity 3.5h ...

Embodiment 2

[0052] according to figure 1 The fluidized bed residual oil hydrogenation process is adopted, and the residual oil raw material B (see Table 2 for properties) is used as the raw material oil. Among them, the operating conditions of the first separator are as follows: operating pressure 17.5MPa, operating temperature 370°C; operating conditions of the second separator are as follows: operating pressure 3.2MPa, operating temperature 360°C; operating conditions of the third separator are as follows: operating The pressure is 17.0MPa, the operating temperature is 48°C; the operating conditions of the fourth separator are as follows: the operating pressure is 3.0MPa, and the operating temperature is 40°C.

[0053] After the liquid phase IV of the fourth separator is mixed with the gas phase II of the second separator, the temperature is 272°C, and it enters the hydrofining reactor. The reaction conditions are: reaction pressure 3.0MPa, liquid hourly volume space velocity 3.2h -1 ,...

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Abstract

The invention discloses a method and a system for producing an ethylene unit raw material from residual oil. The method comprises the following steps that: a residual oil raw material and hydrogen are mixed and heated and then enter a residual oil hydrogenation reactor for hydrogenation reaction; residual oil hydrogenation generated oil enters a first separator to obtain a gas phase I and a liquid phase I; the gas phase I enters a third separator to obtain a gas phase III and a liquid phase III; the liquid phase III enters a fourth separator to obtain a gas phase IV and a liquid phase IV; the liquid phase I enters a second separator to obtain a gas phase II and a liquid phase II; the gas phase II and the liquid phase IV enter a hydrofining reactor for hydrogenation reaction; and a hydrogenation product and the liquid phase II enter a fractionating tower, and gas, naphtha, diesel oil, wax oil and unconverted oil are obtained through fractionation, wherein the naphtha is directly used as an ethylene unit raw material. According to the method, a wide naphtha fraction can be obtained, the requirements of the ethylene device raw material can be met, subsequent processing is not needed, the technological process is simple, the operation and control are easy and convenient, the cost is low, and the energy consumption is low.

Description

technical field [0001] The invention belongs to the field of petroleum refining, and in particular relates to a method and a system for producing raw materials of ethylene equipment from residual oil. Background technique [0002] Residual oil hydrogenation technology, as one of the important means of heavy oil processing at present, is favored by more and more refining and chemical enterprises. At present, in order to improve the yield and quality of light oil, residual oil hydrogenation technology has been widely used. The residual oil hydrogenation process mainly includes: fixed bed residual oil hydrogenation process, ebullating bed hydrogenation process, suspension bed hydrogenation process and moving bed hydrogenation process, among which the fixed bed residue oil hydrogenation technology is the most widely used. The conversion rate of raw materials is generally between 10% and 40%, and the hydrogenation products are mainly used as raw materials for catalytic cracking ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G67/00
CPCC10G67/00C10G2300/4006C10G2300/4012C10G2300/4018C10G2300/70Y02P20/52
Inventor 徐大海李扬丁贺陈光代萌
Owner CHINA PETROLEUM & CHEM CORP