Fast fluidized-bed reactor, device, and method using oxygen-containing compound for manufacturing propene or C4 hydrocarbon

A fast fluidized-bed reactor for preparing propylene and C4 hydrocarbons from oxygen-containing compounds, comprising:

• a reactor shell, one or more reactor feed distributors, a first reactor gas-solid separator, a second reactor gas-solid separator, a reactor heat extractor, a product gas outlet and a reactor stripper, wherein the lower part of the fast fluidized-bed reactor is a dense phase zone, the upper part of the fast fluidized-bed reactor is a dilute phase zone, one and more reactor feed distributors are disposed in the dense phase zone, the reactor heat extractor is disposed inside or outside the reactor shell, the first reactor gas-solid separator and the second reactor gas-solid separator are placed outside the reactor shell, the first reactor gas-solid separator is equipped with a regenerated catalyst inlet, the catalyst outlet of the first reactor gas-solid separator is located at the bottom of the dense phase zone, the gas outlet of the first reactor gas-solid separator is located in the dilute phase zone, the inlet of the second reactor gas-solid separator is located in the dilute phase zone, the catalyst outlet of the second reactor gas-solid separator is placed in the dense phase zone, the gas outlet of the second reactor gas-solid separator is connected to the product gas outlet, and the reactor stripper passes through the reactor shell from outside to inside at the bottom of the fast fluidized-bed reactor and is opened in the dense phase zone of the fast fluidized-bed reactor, a reactor stripping gas inlet is arranged at the bottom of the reactor stripper, and a spent catalyst outlet is arranged at the bottom of the reactor stripper.