Fluidized bed reactor and material treatment method thereof

Abstract

The invention provides a fluidized bed reactor which comprises a main circulation loop, wherein the main circulation loop comprises a lifting pipe, a pressure damping unit, a main gas-solid separation unit and a main material returning unit, the pressure damping unit is used for forming a sub-circulation loop with the lifting pipe so as to form a pressure balance closed loop through the sub-circulation loop, and the pressure damping unit comprises a gas-solid separation sub-unit and a material returning sub-unit; an inlet of the gas-solid separation sub-unit is communicated with a gas-solid phase outlet of the lifting pipe, and a gas phase outlet of the gas-solid separation sub-unit is communicated with an inlet of the main gas-solid separation unit; and an inlet of the material returning sub-unit is communicated with a solid phase outlet of the gas-solid separation sub-unit and an outlet of the main material returning unit, and an outlet of the material returning sub-unit is communicated with a material returning opening of the lifting pipe.

Description

technical field [0001] The invention belongs to the technical field of chemical reaction, and relates to a fluidized bed reactor and a material processing method thereof. Background technique [0002] The circulating fluidized bed is a common gas-solid two-phase reaction or gas-liquid-solid three-phase reaction reactor, which consists of a riser, a gas-solid separator and a return device, and a riser connecting the gas-solid separator and the return device composition. The main reaction zone of the circulating fluidized bed is in the riser. In order to strengthen the reaction and increase the product yield, the solid phase concentration in the riser is generally higher. Therefore, gas blow-by in the return device often occurs due to high riser bed pressure and bed fluctuations, resulting in a decrease in the separation efficiency of the gas-solid separator and affecting the normal and efficient operation of the circulating fluidized bed reactor. Especially with the increas...

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Problems solved by technology

Therefore, gas blow-by in the return device often occurs due to high riser bed pressure and bed fluctuations, resulting in a decrease in the separation efficiency of the gas-solid separator and affecting the normal and efficient operation of the circulating fluidized bed reactor.

Especially with the increase of operating pressure, the concentration of particles in the riser rises, and the resistance of the cyclone separator increases. The circulation pressure balance is destroyed, and the gas blowing in the circulation circuit is serious

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