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Stripping method for reclaimable catalyst

A technology of standby catalyst and standby agent, which is applied in chemical instruments and methods, catalyst regeneration/reactivation, physical/chemical process catalysts, etc., can solve problems such as limiting the stripping effect, achieve improved stripping effect, and be easy to implement , the effect of suppressing the generation of large bubbles

Inactive Publication Date: 2004-03-31
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But its baffle stripper limits the further improvement of its stripping effect

Method used

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  • Stripping method for reclaimable catalyst
  • Stripping method for reclaimable catalyst
  • Stripping method for reclaimable catalyst

Examples

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Effect test

Embodiment

[0038] This example illustrates that the stripping efficiency can be significantly improved by adopting the stripping method of the spent catalyst provided by the present invention.

[0039] Transform the stripper of the medium-sized riser catalytic cracking unit, adopt the internal member of the present invention, the structure of the internal member is as follows figure 1 shown. The inner diameter of the stripper is 500mm, and there are 4 internal components in the stripper. The height of the inner member is 100mm, and each inner member is divided into 4 areas. The baffle sheet in each area is 45° to the horizontal direction. The inner members are placed horizontally from top to bottom along the axial direction, and make the axial adjacent The inclination directions of the upper and lower corresponding baffle pieces in the inner member are different. If the upper layer is inclined clockwise, the lower layer is inclined counterclockwise, and vice versa. The interval betwee...

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Abstract

A method of catalytically cracking regenerative catalysts with gas stripping. It comprises: a regenerative catalyst after reaction entering a gas stripping machine, contacting refluently with medium for gas stripping, removing petroleum hydrocarbon, then the regenerative catalyst leaving the gas stripping machine. The gas stripping machine has inner members with configuration of four-storey column trays or more. the regenerative catalyst and gas stripping medium all change their flowing directions when passing every storey of inner member.

Description

technical field [0001] The invention belongs to the catalytic cracking method of petroleum hydrocarbons in the absence of hydrogen, more specifically, it is a stripping method of catalytic cracking spent catalyst. Background technique [0002] In the conventional catalytic cracking process, the raw oil is atomized with water vapor and sprayed into the riser, where it contacts the high-temperature catalyst (600-700°C) from the regenerator, and then vaporizes and reacts. The residence time of oil and gas in the riser is very short, generally only a few seconds. The reaction product is separated from the entrained catalyst by the cyclone separator and then leaves the reactor to the fractionation tower. The catalyst with coke (called spent catalyst) falls into the stripping section below from the settler. The stripping section is equipped with multi-layer herringbone baffles and superheated steam is introduced at the bottom, and the oil gas adsorbed on the catalyst to be used ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J8/12B01J38/06C10G11/00
Inventor 朱丙田侯拴弟龙军许克家李松年钟孝湘赵俊鹏汪燮卿
Owner CHINA PETROLEUM & CHEM CORP
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