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A kind of alkane dehydrogenation catalyst regeneration method and regeneration device

A regeneration device and alkane dehydrogenation technology, applied in the direction of catalyst regeneration/reactivation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of difficult disposal of spent catalysts, environmental pollution, etc., and achieve safe combustion and benefit heat. The effect of exchanging and improving the uniformity

Active Publication Date: 2021-07-09
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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  • A kind of alkane dehydrogenation catalyst regeneration method and regeneration device
  • A kind of alkane dehydrogenation catalyst regeneration method and regeneration device

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Experimental program
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Effect test

Embodiment 1

[0060] Adopt the round 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 apparent gas velocity at the top of the dense bed is The gas velocity is 0.1m / s, and there is no sleeve at the bottom of the bed. The proportion of air and natural gas is calculated based on the complete combustion of natural gas, and the excess oxygen is 2vol%. The bottom temperature of the catalyst dense-phase bed is 680°C, the top temperature is 705°C, and the dilute phase temperature of the regenerator is 713°C. The CO content in the flue gas is 0.35vol%.

Embodiment 2

[0062] Adopt the round 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 apparent gas velocity at the top of the dense bed is The gas velocity is 0.1m / s. A sleeve is arranged at the bottom of the bed, the average superficial gas velocity in the sleeve is 4m / s, and the height of the sleeve is 2m. The proportion of air and natural gas is calculated based on the complete combustion of natural gas, and the excess oxygen is 2vol%. Under such conditions, the bottom temperature of the catalyst dense-phase bed is 693°C, the top temperature is 701°C, and the dilute-phase temperature of the regenerator is 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 complete combustion of fuel, and has the function of promoting the internal ...

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Abstract

A regeneration device for an alkane dehydrogenation catalyst, comprising a regenerator containing the catalyst and a regeneration settler, the diameter of the cross section of the regenerator gradually decreases from top to bottom, and the cross section of the regenerator is circular; preferably, the regenerator The shape of the round table is inverted, and the cross section of the table decreases gradually from top to bottom. The regeneration device of the alkane dehydrogenation catalyst provided by the invention is beneficial to the transfer of free radicals, facilitates the rapid and sufficient combustion of fuel, and thus ensures the safe operation of the device. Moreover, the temperature in the bed layer is evenly distributed, which avoids catalyst sintering caused by excessive local temperature, and simplifies the structure of the equipment.

Description

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

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J38/36
CPCB01J38/36
Inventor 李春义王国玮
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)