Rotary countercurrent reactor

By designing a rotary countercurrent reactor, using the rotary distributor and pallet to achieve uniform distribution and reverse contact of the catalyst, the problems of uneven reactions and low yields in the existing small molecule olefin production technology are solved, and the yield and production efficiency of olefins are significantly improved.

CN119633693APending Publication Date: 2025-03-18QINGDAO HUICHENG PETROCHEM TECH
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Patent Information

Application Number
CN202411922900.1
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-25
Publication Date
2025-03-18

AI Technical Summary

Technical Problem

In the existing small molecule olefin production technology, the reaction is uneven, the yield is low, the production efficiency is low, and the high-temperature cracking furnace is easy to coke, and it is only suitable for light raw oils.

Method used

A rotary countercurrent reactor is designed. By setting a rotary distributor, pallet and conveyor belt in the reactor, uniform distribution and reverse contact of the catalyst are achieved, combined with a preheater to convert the raw material into a gas phase, and the pressure is balanced by the air conduit and holes to achieve gas-solid countercurrent fluidization.

Benefits of technology

It significantly improves the yield and production efficiency of small molecule olefins, solves the problem of uneven configuration of traditional lift tube reactors, and is suitable for the cracking of hydrocarbon derivatives.

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Abstract

The invention provides a rotary countercurrent reactor, which is characterized in that a catalyst enters the reactor from a catalyst inlet to form a dense-phase bed layer on a tray of a rotary distributor, and the dense-phase bed layer moves downwards along with the tray after being uniformly distributed by the rotary distributor, so that an endothermic reaction mainly including cracking occurs at a raw material inlet and a dilute-phase region at the bottom of the rotary distributor; an oil-gas intermediate product is generated, and the oil-gas intermediate product continuously moves upwards to continuously generate cracking reaction with the catalyst on the tray of the rotary distributor, so that the gas-phase hydrocarbon and / or hydrocarbon derivative raw material and the oil-gas intermediate product are reversely contacted with the catalyst particles on the tray; and the contact and reaction of hydrocarbons which are easy to generate cracking reaction with a low-temperature and low-activity catalyst are realized, and the contact and reaction of hydrocarbons which are difficult to generate cracking reaction and oil gas intermediate products with a high-temperature and high-activity catalyst are realized, so that the problem of non-uniform configuration of a traditional riser reactor is solved, and the yield and production efficiency of small molecular olefins are improved.
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