Patent ID: 11872549
Assignee: DALIAN INSTITUTE OF CHEMICAL PHYSICS, CHINESE ACADEMY OF SCIENCES
Field: Chemical engineering (Chemistry)
Classification: CPC B  C  Y | IPC B  C

Claim 12:
13. The method according to claim 9, wherein the catalyst flows in the annular direction along the catalyst circulation hole on each of n−1 of the n baffles; and the coke control raw material enters the n coke control zone subzones from the coke control zone distributor to react with the catalyst;
wherein the coke controlled catalyst prepared enters the reaction zone through the coke controlled catalyst delivery pipe, and then contacts and reacts with a raw material comprising the oxygen-containing compound fed through a reaction zone distributor to generate a second stream with low-carbon olefins and a spent catalyst; and the product further comprises a coke control product gas, and the coke control product gas enters the first gas-solid separation zone through a coke control zone gas delivery pipe;
wherein the second stream is mixed with the coke control product gas entering the first gas-solid separation zone to produce a third stream; the third stream enters a second gas-solid separation unit to undergo gas-solid separation to obtain a gas-phase stream and a solid-phase stream; the gas-phase stream is a low-carbon olefin-containing product gas; and the solid-phase stream comprises the spent catalyst;
wherein the gas-phase stream enters a first gas collection chamber, and then enters a downstream working section through a product gas delivery pipe; the solid-phase stream is returned to the reaction zone of the fluidized bed reactor; and the catalyst in the reaction zone enters a first stripper through an open end of a first stripper inlet pipe to undergo stripping, and then enters a downstream zone.