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Alkane dehydrogenation catalyst regeneration method and alkane dehydrogenation catalyst regeneration apparatus

A regeneration device, a technology for alkane dehydrogenation, applied in catalyst regeneration/reactivation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of difficult disposal of waste catalysts, environmental pollution, etc. Safety and the effect of strengthening internal circulation

Active Publication Date: 2019-01-01
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The supported Cr-based catalyst has excellent dehydrogenation performance, but the hexavalent chromium generated by catalyst regeneration has a strong carcinogenic effect, and the production and use of the catalyst may cause environmental pollution, and the disposal of the spent catalyst is also a problem

Method used

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  • Alkane dehydrogenation catalyst regeneration method and alkane dehydrogenation catalyst regeneration apparatus
  • Alkane dehydrogenation catalyst regeneration method and alkane dehydrogenation catalyst regeneration apparatus

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Effect test

Embodiment 1

[0060] Using the inverted table regenerator of the present invention (that is, the cross-sectional diameter of the regenerator gradually increases from the bottom to the top), the height of the dense bed is 8m, the apparent gas velocity at the bottom is 0.8m / s, and the top of the dense bed is apparent The gas velocity is 0.1m / s, and there is no sleeve at the bottom of the bed. The ratio of air to natural gas is calculated based on the complete combustion of natural gas, and the excess oxygen is 2vol%. The bottom temperature of the dense catalyst bed was 680°C, the top temperature was 705°C, and the dilute phase temperature of the regenerator was 713°C. The CO content in the flue gas is 0.35 vol%.

Embodiment 2

[0062] Using the inverted table regenerator of the present invention (that is, the cross-sectional diameter of the regenerator gradually increases from the bottom to the top), the height of the dense bed is 8m, the apparent gas velocity at the bottom is 0.8m / s, and the top of the dense bed is apparent The gas velocity is 0.1m / s. A sleeve is set at the bottom of the bed, the average apparent gas velocity in the sleeve is 4m / s, and the height of the sleeve is 2m. The ratio of air to natural gas is calculated based on the complete combustion of natural gas, and the excess oxygen is 2vol%. Under these conditions, the bottom temperature of the dense catalyst bed was 693°C, the top temperature was 701°C, and the dilute phase temperature of the regenerator was 707°C. The CO content in the flue gas is 0.12vol%.

[0063] It can be seen that the sleeve is more conducive to the full combustion of the fuel, and has the effect of promoting the internal circulation of the catalyst and furthe...

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Abstract

The invention relates to an alkane dehydrogenation catalyst regeneration apparatus, which comprises a regenerator for accommodating a catalyst and a regeneration settler, wherein the diameter of the cross section of the regenerator is gradually reduced from top to bottom, the cross section of the regenerator is circular, preferably the shape of the regenerator is an inverted round table, and the cross section of the round table is gradually reduced from top to bottom. According to the present invention, the regeneration apparatus can easily achieve the free radical transfer and the rapid and complete full combustion so as to ensure the safe operation of the apparatus; and the temperature distribution in the bed layer is uniform, such that the catalyst sintering caused by the excessive local temperature can be avoided, and the structure of the device is simplified.

Description

Technical field [0001] The invention relates to a catalyst regeneration device, in particular, to a catalyst regeneration device for the dehydrogenation of alkanes to olefins. Background technique [0002] Olefins and diolefins (ethylene, propylene, butene, isobutylene, isoprene and butadiene, etc.) are used in synthetic resins, plastics, high-octane gasoline blending components (methyl tert-butyl ether, methyl tert-amyl Base ether and alkylated oil) and other high value-added products are widely used. These olefins in addition to steam cracking of hydrocarbons (such as steam cracking of ethane, steam cracking of naphtha), catalytic cracking of olefins (such as Superflex technology), heavy oil catalytic cracking (such as TMP, DCC technology) and heavy oil catalytic pyrolysis (such as In addition to CPP technology) and other process production, the catalytic dehydrogenation of alkanes is also an important technical route for the production of olefins and diolefins. [0003] Alkane...

Claims

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Application Information

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IPC IPC(8): B01J38/36
CPCB01J38/36
Inventor 李春义王国玮
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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