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Spent catalytic cracking catalyst stripping method

A kind of waiting catalyst, catalytic cracking technology, applied in catalytic cracking, physical/chemical process catalysts, chemical instruments and methods, etc., can solve problems such as oil and gas coking, prevent oil and gas coking, large processing capacity, and no fluidization death. zone effect

Active Publication Date: 2006-04-26
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this stripping packing structure also has a local fluidized dead zone, which is prone to oil and gas coking when it is used for the stripping of the spent agent.

Method used

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  • Spent catalytic cracking catalyst stripping method
  • Spent catalytic cracking catalyst stripping method
  • Spent catalytic cracking catalyst stripping method

Examples

Experimental program
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Embodiment

[0039] This example illustrates that the stripping effect is significantly improved after adopting the stripping method provided by the present invention.

[0040] Figure 7 It is a schematic structural diagram of the cold-state experimental device adopted in this embodiment. The device is a circulating fluidized device, as shown in the figure, the catalyst is lifted to the settler 32 in the riser 37, and after the two-stage separation of the swirl head 38 and the cyclone separator 31, it enters the stripping section 33 and is stripped. After completion, it enters the storage bin 34, quantitatively feeds the pre-lifter 36 through the screw feeder 35, and then enters the riser 37 for the next round of circulation. The diameter of the stripping section used in the experiment is 200mm, the total height is 1.5m, and the stripping section is in accordance with Figure 5 The internal components of the present invention are set as shown; the diameter of the riser is 80mm, and the h...

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Abstract

The stripping process of catalytically cracking catalyst to be regenerated includes the following steps: making the reacted catalyst to be regenerated enter the stripping plant, contacting with stripping medium in reverse flow to eliminate entrained petroleum hydrocarbon, and discharging regenerated catalyst after being stripped from the stripping plant. Inside the stripping plant, one or several layers of stuffing are set, and the stuffing layer is constituted with inner members, each of which includes two or more auxiliary guide blades and two main guide blades connected to the auxiliary guide blades in splay configuration. The present invention has obvious raised stripping efficiency.

Description

technical field [0001] The invention relates to a spent catalyst stripping method used in a catalytic cracking process. Background technique [0002] Fluid Catalytic Cracking (FCC) is an important secondary processing process in the petroleum refining industry, which uses heavy feedstock oil to produce light oil products such as gasoline, diesel, and liquefied petroleum gas. The main steps are as follows, the hydrocarbon raw material is contacted with the hot regenerated catalyst in the riser, and the catalytic cracking reaction is carried out at 450 ° C ~ 550 ° C; after the reaction, the mixture of oil gas and the catalyst to be regenerated enters the settler, and is cyclone separated in the settler The unproductive catalyst is separated by the device and enters the stripper, while the oil and gas enters the subsequent product separation system. The raw catalyst is in countercurrent contact with water vapor in the stripper, and after removing the entrained hydrocarbons, it...

Claims

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Application Information

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IPC IPC(8): C10G11/18B01J38/30
Inventor 张永民龙军侯栓弟张占柱张久顺鲁维民何峻
Owner CHINA PETROLEUM & CHEM CORP