A combined type catalyst stripper

Abstract

The invention discloses a combined-typed catalyst stripper, suitable for the oil refining field. The invention consists of a retaining plate section and a circumfluence section. The retaining plate section includes an internal ring retaining plate, an external ring retaining plate and a section of steam distributor; the bottoms of the internal ring retaining plate and the external ring retaining plate are respectively provided with a skirt plate; the internal ring retaining plate and the external ring retaining plate are provided with passages (holes or narrow seams, etc.) for the circulation of the stripping steam; the skirt plates are staggered with a plurality of holes and nozzles; the circumfluence section is provided with a taper screen plate, a flow guide cylinder, an internal ring and an external ring steam distributor which can bear the retaining plate section; the bottom part of the taper screen plate is connected with a central blanking pipe with the lower end extended into the flow guide cylinder. The invention adopts the organic combination of two stripping types of cone disc and circumfluence; therefore, the equipment can implement the high-efficiency contact between the two phases of gas and solid, and ensure the catalyst and the steam to have enough contact time. The stripper is suitable for the stripping of the spent catalyst with oil gas of all catalytic transformation processes and the solid grains with impurity gases.

Description

technical field [0001] The invention relates to a combined catalyst stripping equipment, which belongs to the field of petrochemical industry. Background technique [0002] In the field of petrochemical industry, it is often necessary to strip solid particles to remove impurity gases adsorbed and entrained by solid particles. For example, in the fluidized catalytic cracking (FCC) settler, the catalyst particles and the interior of the particle pores are filled with oil and gas, accounting for about 2wt% to 4wt% of the total product. Most of it is carried by the catalyst to the regenerator for burning, which not only increases the heat load of the regenerator but also reduces the yield of light oil. Usually this part of oil and gas is removed by steam stripping. The stripping effect directly affects the product yield and energy consumption of the device. For heavy oil catalytic cracking, it even affects the processing capacity of the device. [0003] The oil and gas entrain...

AI Technical Summary

Problems solved by technology

However, this stripper also has some disadvantages, such as: relatively large pressure drop, cannot be applied to a stripping section with a large height, etc., and is limited in industrial applications

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