Reaction device for preparing light olefins from methanol and/or dimethyl ether

A reaction device for preparing light olefins from methanol and/or dimethyl ether comprising a dense phase fluidized bed reactor, a cyclone separator, a stripper, a lift pipe, a dense phase fluidized bed regenerator, a cyclone separator, a stripper, and a lift pipe;

• wherein a feeding line for reactor is connected to the bottom of the dense phase fluidized bed reactor;
• a part of the stripper is in the dense phase fluidized bed reactor, and the remaining part thereof is below the dense phase fluidized bed reactor;
• the bottom of the lift pipe is connected to the bottom of the stripper, and the top of the lift pipe is connected to the dense phase fluidized bed regenerator;
• a feeding line for regenerator is connected to the bottom of the dense phase fluidized bed regenerator;
• a part of the stripper is in the dense phase fluidized bed regenerator, and the remaining part thereof is below the dense phase fluidized bed regenerator;
• the bottom of the lift pipe is connected to the bottom of the stripper, and the top of the lift pipe is connected to the dense phase fluidized bed reactor, wherein a material flow controller is provided in the dense phase fluidized bed reactor and/or the dense phase fluidized bed regenerator, and the dense phase fluidized bed reactor is separated into n secondary reaction zones by the material flow controller and the 1st to the nth secondary reaction zones are sequentially connected;
• the dense phase fluidized bed regenerator is separated into m secondary regeneration zones by the material flow controller and the 1st to the mth secondary regeneration zones are sequentially connected;
• and wherein n≧2, and m≧2.