Catalytic reforming and catalytic dehydrogenation centrifugal type fixed bed radial reactor

Abstract

The invention discloses a kind of fixed bed reactor for catalytic reforming and dehydrogenation, the reactor uses a round pressure container which has a catalytic bed. The inlet and the outlet is at one side of the container, the catalytic bed is made up of outer multi-hole wall and round inner multi-hole wall, catalyst is filled in them, there has a cover sealing structure on the catalyst, the round inner multi-hole wall can uses variable hole-rate or zone structure. The reacting gas in the device flows centrifugally, the gas in the centre inner barrel and multi-hole outer barrel flow reversely.

Description

technical field [0001] The invention belongs to the technical field of hydrocarbon processing, and relates to a fixed bed gas-solid phase catalytic reaction device suitable for medium, low or negative pressure, in particular to a fixed bed radial reaction device suitable for catalytic reforming and catalytic dehydrogenation . Background technique [0002] For catalytic reforming and catalytic dehydrogenation, the reaction medium contains a large amount of hydrogen, and its hydrogen-to-hydrocarbon molar ratio is as high as 6-10 times or higher. A large number of gas cycles make reducing the pressure drop of the reactor an important factor for improving catalyst utilization and saving energy. the key to. In the existing reaction methods of catalytic reforming and catalytic dehydrogenation, in order to improve the utilization rate of the catalyst, the catalyst with small particle size is usually used; in order to reduce the pressure drop of the reactor and reduce the power con...

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Problems solved by technology

[0005] 2. U.S. Patent No. 3,099,208 believes that there is a dead zone locally in the catalyst seal. In order to avoid coking and improve the utilization rate of the catalyst there, it is proposed to use a cone structure for the catalyst seal, but this leads to an increase in the height of the catalyst seal. Complex structure

[0006] 3. The reactor adopts centripetal flow, and the reaction gas flows downward in the shunt channel between the side wall of the cylindrical container and the outer cylinder of the porous wall. Due to heat loss, the difference in the axial temperature of the bed will be caused, which will affect the heat absorption. particularly unfavorable reaction

[0007] 4. The centripetal flow from the outside to the inside does not meet the requirements of volume-enhancing reaction catalytic reforming and catalytic dehydrogenation along the molecular weight growth in the reaction process. Therefore, US Patent No. 5,885,442 adopts the centrifugal flow mode of reaction gas, which is beneficial to obtain Higher octane number gasoline and increased operating load, but did not solve the defect of large pressure drop due to Z-type flow distributor control

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