Method for safely reusing and treating hydrogenated tail gas in hydrogenation reaction device

A technology of hydrogenation reaction and treatment method, applied in gas treatment, chemical instruments and methods, separation methods, etc., can solve problems such as poor safety, and achieve the effect of preventing explosion, ensuring overall safety, and achieving good technical effects

Active Publication Date: 2019-07-16
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0003] The technical problem to be solved by the present invention is the problem of poor safety caused by the direct discharge of hydrogenation tail gas in the prior art, and a new hydrogenation tail gas safe recycling and treatment method in a hydrogenation reaction device is provided, which has better safety advantage

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  • Method for safely reusing and treating hydrogenated tail gas in hydrogenation reaction device

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Embodiment 1

[0018] A method for safe reuse and treatment of hydrogenation tail gas in a hydrogenation reaction device, such as figure 1 As shown, after the purge gas of the aromatics hydrogenation system is separated by the gas-liquid separator, part of the gas phase enters the low-temperature catalytic oxidation reactor through the discharge pipeline, the gas at the outlet of the reactor is discharged after passing through the flame arrester, and the other part of the gas phase enters the hydrogen recovery pipeline; A gas component analyzer is installed at the gas phase outlet on the top of the liquid separator to analyze the composition changes in the tail gas online. When hydrogen reuse is selected, an upper limit index is set for the content of organic matter in the tail gas. When this index is exceeded, the reuse pipeline valve is automatically closed. , while opening the discharge pipeline valve; the low-temperature catalytic oxidation reactor is equipped with a catalyst and an adsor...

Embodiment 2

[0023] A method for safe reuse and treatment of hydrogenation tail gas in a hydrogenation reaction device, such as figure 1 As shown, after the purge gas of the aromatics hydrogenation system is separated by the gas-liquid separator, part of the gas phase enters the low-temperature catalytic oxidation reactor through the discharge pipeline, the gas at the outlet of the reactor is discharged after passing through the flame arrester, and the other part of the gas phase enters the hydrogen recovery pipeline; A gas component analyzer is installed at the gas phase outlet on the top of the liquid separator to analyze the composition changes in the tail gas online. When hydrogen reuse is selected, an upper limit index is set for the content of organic matter in the tail gas. When this index is exceeded, the reuse pipeline valve is automatically closed. , while opening the discharge pipeline valve; the low-temperature catalytic oxidation reactor is equipped with a catalyst and an adsor...

Embodiment 3

[0028] A method for safe reuse and treatment of hydrogenation tail gas in a hydrogenation reaction device, such as figure 1 As shown, after the purge gas of the aromatics hydrogenation system is separated by the gas-liquid separator, part of the gas phase enters the low-temperature catalytic oxidation reactor through the discharge pipeline, the gas at the outlet of the reactor is discharged after passing through the flame arrester, and the other part of the gas phase enters the hydrogen recovery pipeline; A gas component analyzer is installed at the gas phase outlet on the top of the liquid separator to analyze the composition changes in the tail gas online. When hydrogen reuse is selected, an upper limit index is set for the content of organic matter in the tail gas. When this index is exceeded, the reuse pipeline valve is automatically closed. , while opening the discharge pipeline valve; the low-temperature catalytic oxidation reactor is equipped with a catalyst and an adsor...

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Abstract

A method for safely reusing and treating hydrogenated tail gas in a hydrogenation reaction device mainly solves that problem of poor safety caused by direct discharge of hydrogenated tail gas in the prior art. The method for safely reusing and treating hydrogenated tail gas in the hydrogenation reaction device is adopted, purge gas of an aromatic hydrogenation system is separated by a gas-liquid separator, a part of a gas phase enters a low-temperature catalytic oxidation reactor through a discharge pipeline, the gas at the outlet of the reactor is discharged after passing through a fire arrester, and the other part of the gas phase enters a hydrogen reuse pipeline. A gas component analyzer is arranged on a gas phase outlet in the top of the gas-liquid separator, so as to analyze the composition change of the tail gas on line, an upper limit index is set for the organic content in the tail gas when hydrogen reuse is selected, and when the index is exceeded, a reuse pipeline valve is automatically closed and a discharge pipeline valve is opened at the same time. The technical scheme that a catalyst and an adsorbent are installed in the low-temperature catalytic oxidation reactor solves the above problems and can be used for treating hydrogen-containing purge gas.

Description

technical field [0001] The invention relates to a method for safely reusing and treating hydrogenation tail gas in a hydrogenation reaction device. Background technique [0002] The hydrogenation process is a commonly used process type in chemical production. Most of them use hydrogen to participate in the reaction, which has a high risk. At the same time, the tail gas treatment after the reaction often contains hydrogen, which is also dangerous. Tail hydrogen in hydrocracking and other refining and chemical processes adopts a recycling mode, while small-scale chemical plants often discharge directly. With the improvement of safety and environmental protection requirements, it is urgent to propose a safe hydrogenation tail gas treatment technology. For example, in the hydrogen peroxide production process of anthraquinone method, a large amount of aromatic hydrocarbons and anthraquinone organic substances are used as the production medium of hydrogen peroxide. The first step ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/86
CPCB01D53/86B01D53/0407B01D2253/112B01D2255/1023B01D2257/108
Inventor 张帆石宁徐伟贾学五费轶王振刚刘静如
Owner CHINA PETROLEUM & CHEM CORP
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