Spouted circulating fluidized bed and spouted circulating fluidized bed process

Abstract

The invention relates to the field of chemical equipment, particularly relates to a spouted circulating fluidized bed and a spouted circulating fluidized bed process. A spouted circulating fluidized bed system comprises a preheating system, a feeding system, a main reactor, a gas-solid separation system, a condensation system, a gas purifying system and a monitoring system. According to the spouted circulating fluidized bed process, non-condensable gas is used as circulating fluidization carrier gas and enters the main reactor through the feeding system; biomass is introduced into the main reactor and bed materials are heated to be pyrolyzed; generated pyrolysis gas, carbon and the carrier gas enter the gas-solid separation system to be subjected to gas-solid separation to remove the solid product carbon; pyrolysis gas generated after pyrolysis is processed in the condensation system to obtain biological oil and the non-condensable gas takes part in continuous circulation; and the non-condensable gas is recycled or discharged out of the system. The spouted circulating fluidized bed and the spouted circulating fluidized bed process have the advantages that equipment facilitates industrialized production and the operation cost is relatively low.

Description

technical field [0001] The invention relates to the field of chemical equipment, in particular to a fluidized bed reaction system and a spraying circulating fluidized bed process. Background technique [0002] The fluidized bed reactor is mainly used in the aromatization reaction. The traditional fluidized bed reactor includes the tower body, the gas inlet and outlet ports at the top and bottom of the tower body, and a gas distributor is set at the gas inlet at the bottom end. Inject into the reactor near the outlet position, mix evenly with the gas coming in from the sparger, and move upwards driven by the gas velocity. At the upper part of the reactor, the catalyst is separated from the gas under the action of gravity, and is exported out of the reactor through the outlet pipe. The disadvantage of this kind of fluidized bed reactor is that the gas is only distributed once, the gas distribution is uneven, and it is easy to generate large bubbles, large back-mixing, short ci...

AI Technical Summary

Problems solved by technology

The disadvantage of this fluidized bed reactor is that the gas is only distributed once, the gas distribution is uneven, and it is easy to generate large bubbles, large back-mixing, short circuit and channeling, which affect the effective contact time between the gas and the catalyst. and contact area, reducing the reaction efficiency

The depth of reaction cannot be flexibly controlled, and it is easy to cause the secondary reaction of the target product, thus reducing the yield of the target product