Reaction-regeneration device for preparing low-carbon olefin from methanol

Abstract

The invention provides a reaction-regeneration device for preparing low-carbon olefin from methanol. The device mainly solves the problems of high catalyst loss and long driving cycle of the device in the prior art. The reaction-regeneration device for preparing the low-carbon olefin from the methanol comprises a reactor 18, a regenerator 23, a reactor auxiliary combustion chamber 5, a regenerator auxiliary combustion chamber 30, a reactor tertiary cyclone separator 36, a regenerator tertiary cyclone separator 33, a reactor external heater 14, a regenerator external heater 27 and a degassing tank 21; the reactor 18 is connected with the regenerator 23 through a regenerating oblique pipe 10; the degassing tank 21 is connected with the reactor external heater 14 through a regenerated catalyst delivery pipe 8; the lower part of the reactor external heater 14 is provided with a catalyst outlet connected with the reactor 18; a product gas outlet 19 is connected with the reactor tertiary cyclone separator 36; and a flue gas outlet 24 is connected with the regenerator tertiary cyclone separator 33. According to the technical scheme, the problems are well solved; and the device can be used for industrial production of the low-carbon olefin.

Description

technical field [0001] The invention relates to a methanol-to-low-carbon olefin reaction-regeneration device. technical background [0002] Low-carbon olefins, namely ethylene and propylene, are two important basic chemical raw materials, and their demand is increasing. Generally, ethylene and propylene are produced through petroleum routes, but due to the limited supply and high price of petroleum resources, the cost of producing ethylene and propylene from petroleum resources continues to increase. In recent years, people have begun to vigorously develop the technology of converting alternative raw materials into ethylene and propylene. Among them, an important class of alternative raw materials for the production of light olefins are oxygenates, such as alcohols (methanol, ethanol), ethers (dimethyl ether, methyl ethyl ether), esters (dimethyl carbonate, methyl formate Esters), etc., these oxygenated compounds can be converted from coal, natural gas, biomass and other e...

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is the problem of relatively large catalyst loss and long device start-up period in the prior art

Images