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Suspension bed heavy oil hydrogenation process start-up method

A suspended bed and process technology, applied in the field of start-up of the suspended bed hydroprocessing process, can solve problems such as not emphasizing the start-up process and complex process, and achieve the effects of simplifying the start-up steps, simplifying the operation process, and wide adaptability

Active Publication Date: 2012-01-11
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this patent, it is only introduced that under certain operating conditions, molybdenum and nickel active metals are used to carry out hydrogenation conversion of suspended bed heavy oil. Diesel oil and wax oil preheat the reactor, and then switch the raw material residue to start the operation of the device. This process is relatively complicated, and the technical advantages of the suspended bed are not fully utilized according to the characteristics of the suspended bed hydrogenation reaction device.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] This embodiment is the start-up method of the suspended bed heavy oil hydrogenation unit. The specific operation process is: after the airtightness of the device is qualified, the hydrogen gas is heated and passed into the reactor to preheat the reactor. The heating rate of the reactor is 20°C / h. The heavy oil raw material of the molybdenum naphthenate oil-soluble dispersion-type catalyst of / g (calculated as metal), further promotes reactor temperature, and the heating rate is 15 ℃ / h, and stream after reaction obtains gas phase stream and liquid phase stream through separating device, two After being preheated by their respective heating furnaces, they can be recycled. When the temperature of the reactor rises to the specified reaction temperature of 430°C, the circulation of the material after the reaction is stopped, and the device operates normally.

Embodiment 2

[0023] According to the method described in Example 1, after the airtightness of the device is qualified, the nitrogen gas is heated and passed into the reactor to preheat the reactor. When the reactor is preheated to 320°C, replace the nitrogen with hydrogen heated to 320°C, and then switch Catalyst-containing heavy oil feedstock, others are the same as in Example 1. The device starts normally and runs smoothly.

Embodiment 3

[0025] According to the method described in Example 1, after the airtightness of the device is qualified, the water vapor is heated and passed into the reactor to preheat the reactor. When the reactor is preheated to 320°C, first replace the water vapor with nitrogen heated to 320°C , and then replace the nitrogen in the device with hydrogen heated to 320° C., switch the heavy oil feedstock containing the catalyst, and the others are the same as in Example 1. The device starts normally and runs smoothly.

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PUM

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Abstract

The invention discloses a suspension bed heavy oil hydrogenation process start-up method, which comprises the following steps: a reactor is firstly pre-heated by hot gas after a device is qualified in gas seal, after the reactor is pre-heated to 200-360 DEG C, raw oil containing a dispersive type catalyst and pre-heated to the same temperature and hydrogen are mixed and sent into a suspension bed reactor, the temperature of the reactor is further raised, and the material flow after reaction is fully cycled; and after the temperature of the reactor is raised to the reaction temperature, cycling operation is stopped, and device start-up is ended. In the method disclosed by the invention, light distillate and frequent switching operation used in the conventional heavy oil hydrogenation device are omitted, the start-up process is simplified, and the operation cost is reduced; and because the suspension bed hydrogenation start-up method is closely combined with the characteristics of suspension bed hydrogenation technology, the advantages of the technology are fully exerted, and the start-up method disclosed by the invention has wide adaptability.

Description

technical field [0001] The invention relates to a start-up method of a suspended bed hydrogenation treatment process. Especially for the start-up method of the suspended bed hydrogenation process for processing heavy oil raw materials. Background technique [0002] With the vigorous development of heavy crude oil and the changes in the demand structure of petroleum products worldwide, the market demand for light fuel oil continues to grow rapidly and the demand for heavy fuel oil decreases rapidly. The deep processing technology of heavy oil has become the development of the refining industry. the key of. Suspension bed heavy oil hydrogenation technology has the characteristics of wide adaptability of raw materials and flexible operation, and is one of the important means of processing inferior heavy oil raw materials. The structure of the suspended bed hydrogenation reactor is simple, and usually an empty cylinder or a reactor with simple internal components (such as a th...

Claims

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Application Information

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IPC IPC(8): C10G47/00C10G49/24C10G45/00
Inventor 贾丽胡长禄杨涛
Owner CHINA PETROLEUM & CHEM CORP
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