Regenerated catalyst steam-stripping device of flue gas

Abstract

he regenerated catalyst gas stripper comprises: arranging regenerated catalyst lead-in tube (1) and stripping medium lead-off tube (7) on top of the stripper and regenerated inclined tube (5) on bottom of the stripper; fixing and connecting the bottom separation plate (9) with medium distributor (4) on top and stripper cylinder and catalyst outlet pipe (10); arranging the inner sleeve (6b) on top of distributor (4) with the top end of inner sleeve (6a) in inner sleeve (6b) lower than inner sleeve (6b) and the bottom end passing distributor (4) and separation plate (9) to form outlet pipe (10); arranging stripping medium distributor (3) in catalyst outlet pipe (10 under the heat tube (8) with lead-in and lead-out ends for heat medium outside the stripper and other part in stripper. This product has dual-function both for stripping and cooling.

Description

technical field [0001] The invention belongs to petroleum hydrocarbon catalytic conversion equipment, more specifically, a stripper for removing flue gas entrained by a regenerated catalyst. Background technique [0002] In the catalytic cracking unit, as the catalyst circulates, part of the flue gas will be carried by the regenerated catalyst to the riser reactor. According to literature reports, this part of flue gas accounts for about 1-3% of the catalyst circulation. After passing through the riser and settler, this part of the flue gas enters the rich gas compressor with the dry gas, which increases the load of the rich gas compressor and affects the processing capacity and energy consumption of the device. Therefore, it should be reacted when the regenerated catalyst enters the riser This part of the flue gas is removed before the device. [0003] In the catalytic cracking unit (FCC) of the refinery, especially in the catalytic cracking of heavy oil (RFCC), in recent...

AI Technical Summary

Problems solved by technology

The disadvantage is that the heat transfer tube between the upper header and the lower header is prone to permanent distortion at high temperature and affects its service life

[0011] Although there are many patented technologies on flue gas stripping and catalyst cooling, there is no report on the catalytic cracking regenerant flue gas stripper with catalyst cooling function

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