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A suspension bed hydroconversion method for low-quality residual oil

A hydrogenation conversion and suspension bed technology, applied in the chemical industry, can solve the problems that affect the application of the technology and the start-up period, low desulfurization and demetallization, coking in the reactor, etc., and achieve the goal of improving the conversion rate of residual oil, reducing coking, and improving the conversion rate Effect

Active Publication Date: 2019-07-09
CHINA NAT OFFSHORE OIL CORP +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the suspended bed hydrogenation technologies developed at home and abroad have their own advantages and disadvantages. Most of the suspended bed hydrogenation technologies are in the development stage, with low conversion rate, low desulfurization and metal removal, low space velocity, and serious coking in the reactor. and other issues, which directly affect the technology application and start-up cycle

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  • A suspension bed hydroconversion method for low-quality residual oil
  • A suspension bed hydroconversion method for low-quality residual oil
  • A suspension bed hydroconversion method for low-quality residual oil

Examples

Experimental program
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Effect test

Embodiment 1

[0045] Embodiment 1, suspension bed hydroconversion of vacuum residue

[0046] Using CNOOC Huizhou Refinery vacuum residue as raw material (the properties of the raw material are shown in Table 1), the vacuum residue was subjected to suspension bed hydroconversion according to the following steps:

[0047] Table 1. Raw material property data

[0048]

[0049] Use the raw material pump according to 0.5h -1 The volumetric space velocity contains 300ppm catalyst residue oil raw material and hydrogen mixed according to the volume ratio of 1:1000 and then enters the preheating furnace, heated to 180°C by the preheating furnace and enters the radial and axial secondary distributor, after efficient distribution Entering the air-lift loop reactor, in the air-lift loop reactor, the residual oil raw material containing the catalyst and the hydrogen gas go up the axial rotation of the reactor, and the inferior residual oil undergoes a chemical reaction in the reactor, the reactor pre...

Embodiment 2

[0051] Example 2, Suspension bed hydroconversion of vacuum residue

[0052] Using CNOOC Huizhou Refinery vacuum residue as raw material (the properties of the raw material are shown in Table 1), the vacuum residue was subjected to suspension bed hydroconversion according to the following steps:

[0053] Use the raw material pump according to 1.0h -1 The volume space velocity contains 300ppm of catalyst raw material and hydrogen mixed according to the volume ratio of 1:1000, then enters the preheating furnace, is heated to 180 ° C by the preheating furnace, enters the radial and axial secondary distributor, and enters the gas lift after efficient distribution Type loop reactor, in the air-lift loop reactor, the residual oil raw material containing the catalyst and the hydrogen gas go up the axial rotation of the reactor, and the low-quality residual oil undergoes a chemical reaction in the reactor. The reactor pressure is 14Mpa and the temperature is 440°C. The gas and hydroge...

Embodiment 3

[0055] Example 3, Suspension bed hydroconversion of vacuum residue

[0056] Using CNOOC Huizhou Refinery vacuum residue as raw material (the properties of the raw material are shown in Table 1), the vacuum residue was subjected to suspension bed hydroconversion according to the following steps:

[0057] Use the raw material pump according to 0.5h -1 The volumetric space velocity contains 300ppm of catalyst, the residual oil raw material and hydrogen are mixed according to 1:1000 and enter the preheating furnace. After being heated to 180°C in the preheating furnace, it enters the radial and axial secondary distributor, and enters the gas lift after efficient distribution. Type loop reactor, in the air-lift loop reactor, the residual oil raw material containing the catalyst and the hydrogen gas go up the axial rotation of the reactor, and the inferior residual oil undergoes a chemical reaction in the reactor, the reactor pressure is 16Mpa, and the temperature is 460°C. The gas...

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Abstract

The invention discloses an inferior residual oil suspension bed hydrogenation conversion method, which comprises the following steps of (1) mixing hydrogen gas and a residual oil raw material containing a catalyst, then preheating, passing through a radial-axial secondary distributor to enter an air-lift loop reactor, and axially rotary lifting a reaction material in the air-lift loop reactor forcarrying out chemical reaction; (2) feeding the reaction material subjected to chemical reaction into a high-pressure separator and a low-pressure separator, and accomplishing residual oil conversionafter separation. According to the method provided by the invention, after the raw material is secondarily distributed efficiently, the raw material and the hydrogen gas are fully and efficiently mixed to enter the air-lift loop reactor, and a gas-liquid mixture rotatably lifts along an axial direction, so that the material and the temperature are uniformly distributed radially; the material rotatably lifts along an axial direction, so that the standing time of the material in the reactor is increased by 4 times, and the conversion rate is improved; with a rotary type special design of the reactor, the coking of the material in the reactor is greatly reduced, high-efficient conversion of inferior residual oil in a suspension bed reactor is realized, and coking is reduced.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, and in particular relates to a suspension-bed hydrogenation conversion method for low-quality residual oil. Background technique [0002] With the intensification of the trend of crude oil becoming heavier and the exploitation of heavy and extra-heavy crude oil and the increasing market demand for petroleum products, especially various fuels, heavy oil will be an important energy source in the 21st century; heavy oil, especially high The conversion of sulfur, high asphaltene, high metal and high residual carbon heavy oil will still be an important technology of petroleum refining in the 21st century because of its high economic benefits. The processing of heavy oil may bring about problems such as product quality degradation and environmental protection, which should be solved by adopting corresponding processing technology measures. For the vacuum residue of inferior crude oil, becaus...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G67/02C10G45/16
CPCC10G45/16C10G67/02C10G2300/202C10G2300/205
Inventor 张树广吴青赵德智侯章贵刘永民宋官龙王栋张海洪
Owner CHINA NAT OFFSHORE OIL CORP
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