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Method for refining circulating hydrogen in hydrocracking process

A technology of hydrocracking and circulating hydrogen, which is applied in the fields of hydrocarbon oil cracking and petroleum industry, etc. It can solve the problem that it is difficult to increase the concentration of circulating hydrogen, and achieve the effect of improving the performance of hydrogenation reaction

Inactive Publication Date: 2007-05-30
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to solve the problem that it is difficult to increase the circulating hydrogen concentration in the existing hydrocracking process

Method used

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  • Method for refining circulating hydrogen in hydrocracking process
  • Method for refining circulating hydrogen in hydrocracking process
  • Method for refining circulating hydrogen in hydrocracking process

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Embodiment Construction

[0022] Referring to Fig. 6, let the gas coming out of the high-pressure separator 3, that is, the circulating hydrogen in the traditional process, after removing the entrained liquid droplets in the liquid separation tank 4, enter the hydrate method hydrogen purification unit 11, where methane, ethylene When light hydrocarbon components and water contact to form hydrates, hydrogen cannot form hydrates and still exist in the form of gas, so that they are separated from other gases that can form hydrates, and the hydrogen concentration is increased to above 95% (V); leaving hydrates The enriched hydrogen of separation unit 11 is used as circulating hydrogen 9 and pressurized by circulating compressor 6, and returns to hydrotreating reactor 1 and hydrocracking reactor 2 after being mixed with new hydrogen 8, so that the hydrogen concentration in the two reactors and Partial pressure remains high.

[0023] The operation process of hydration, separation and enrichment of hydrogen i...

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Abstract

The invention discloses an extracting method of dense circulating hydrogen in the hydrogenating cracking technique, which comprises the following steps: separating extracted dense circulating hydrogen from high-pressure separator; removing drip in the separatory tank; entering into hydrated-method purifying unit; removing light hydrocarbon component in the circulating hydrogen; blending purified circulating hydrogen and new hydrogen into hydrogenating reactor.

Description

technical field [0001] The invention relates to a method for enriching circulating hydrogen in a hydrocracking process, and belongs to the technical field of petroleum processing. Background technique [0002] Hydrogen is an indispensable raw material for the normal production of hydrocracking units. The purity of hydrogen has an important impact on the manufacturing cost and operating cost of hydrocracking units, as well as the reaction performance related to the target product yield and catalyst operation cycle. The traditional high-pressure hydrocracking system is shown in Figure 1, in which the main equipment includes hydrofinishing reactor 1, hydrocracking reactor 2, high-pressure separator 3, separatory tank 4, new hydrogen compressor 5, circulating hydrogen compressor machine 6, circulating hydrogen heating furnace 7, raw oil feed pump 12, etc. [0003] It can be seen from Figure 1 that the purity of the hydrogen entering the hydrofinishing reactor 1 and the hydrocra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G47/00
Inventor 陈光进马安郭绪强阎立军孙长宇
Owner CHINA UNIV OF PETROLEUM (BEIJING)