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Control method of tail oxygen content in oxygen-enriched oxidation process of cyclohexane

A technology of medium tail oxygen content and oxidation process, applied in chemical instruments and methods, chemical/physical processes, chemical/physical/physical chemical processes, etc., can solve problems such as no research on tail oxygen content control, and achieve the effect of ensuring safety

Inactive Publication Date: 2011-04-27
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The literature "Study on the Hazards of Gas Phase Space in Cyclohexane Oxygen-enriched Oxidation Reactor" (Yin Huaqing et al., "Journal of Hunan University (Natural Science Edition)", Volume 36, Issue 5) studies the "cyclohexane-oxygen-nitrogen" The explosion ternary diagram under the conditions of 160°C and 1MPa shows that the critical oxygen content in the gas phase of the cyclohexanone plant reactor is 9.4%, but there is no specific plan for controlling the tail oxygen content.
There is no report on the technology of the control method of tail oxygen content in the cyclohexane oxygen-enriched oxidation process

Method used

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Examples

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Effect test

Embodiment 1

[0011] The cyclohexanone plant contains 6 reactors, which are set up as 1# to 6# reactors from upstream to downstream according to the process flow, and each of the tail gas pipelines and total tail oxygen pipelines of 1#, 2#, and 3# reactors is equipped with an online Oxygen Analyzer. When the oxygen content analyzed by any online oxygen analyzer exceeds 3.5%, it will alarm. When alarming, the worker should quickly diagnose the cause of the oxygen content exceeding the standard, and take corresponding treatment measures. When it exceeds 5%, it will be interlocked. Flush into nitrogen and treat as an emergency shutdown.

Embodiment 2

[0013] The cyclohexanone plant contains 6 reactors, which are set up as 1# to 6# reactors from upstream to downstream according to the process flow, and each of the tail gas pipelines and total tail oxygen pipelines of 1#, 2#, and 3# reactors is equipped with an online Oxygen Analyzer. When the oxygen content analyzed by any online oxygen analyzer exceeds 4%, it will give an alarm. When the alarm is issued, the worker should quickly diagnose the cause of the oxygen content exceeding the standard, and take corresponding treatment measures. When it exceeds 6%, it will be interlocked, and the gas feed will be cut off when it is interlocked. Flush into nitrogen and treat as an emergency shutdown.

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PUM

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Abstract

The invention relates to a control method of tail oxygen content in an oxygen-enriched oxidation process of cyclohexane. The control method is used for controlling the tail oxygen content through online monitoring of gas phase tail oxygen content and in-time treatment when the oxygen content is super-high by using reaction kettles. The control method is characterized in that: in a cyclohexanone device, tail gas pipelines and a total tail oxygen pipeline of the first three reaction kettles from an upper position to a lower position according to a procedure are respectively provided with an online oxygen analyzer; when the numerical value of any one of the online analyzers exceeds a standard, an alarm or interlocking is started to emergently inject nitrogen into the reaction kettles. Through the perfect control method of the tail oxygen content, the invention ensures that the gas phase oxygen content of the reaction kettles in the oxygen-enriched oxidation process of the cyclohexane cannot exceed the standard, thereby controlling explosion hazards.

Description

technical field [0001] The invention relates to a method for controlling the tail oxygen content of a reaction system in a cyclohexane oxygen-enriched oxidation process. method of oxygen content. Background technique [0002] At present, it is reported that Baling Petrochemical has realized the industrialization of cyclohexane oxygen-enriched oxidation process. The literature "Study on the Hazards of Gas Phase Space in Cyclohexane Oxygen-enriched Oxidation Reactor" (Yin Huaqing et al., "Journal of Hunan University (Natural Science Edition)", Volume 36, Issue 5) studies the "cyclohexane-oxygen-nitrogen" The explosion ternary diagram under the conditions of 160°C and 1MPa shows that the critical oxygen content in the gas phase of the cyclohexanone plant reactor is 9.4%, but no specific scheme for controlling the tail oxygen content has been studied. There is no report on the technology of the tail oxygen content control method of cyclohexane oxygen-enriched oxidation process...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J19/00
Inventor 孙峰谢传欣李楚新石宁
Owner CHINA PETROLEUM & CHEM CORP
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