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AssigneesChina Petroleum & Chemical Corporation, Shanghai Research Institute of Petrochemical Technology, Sinopec
InventorsHongyuan Zong, Guozhen Qi, Jing Cao, Xiaohong Li, Zhinan Yu, Li Wang
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The invention relates to a method for regulating the gas velocity of the empty bed in a fluidized bed, wherein solid catalysts are used as fluidized particles or as a part of fluidized particles, characterized in that the gas velocity of the empty bed μ of the reaction zone of the fluidized bed is measured, compared with the bed average catalyst density ρ of the solid catalysts in the reaction zone of the fluidized bed, the gas velocity of the empty bed μ being adjusted as required such that the gas velocity of the empty bed μ and the bed average catalyst density ρ satisfy the formula (I) below: ρ=0.356μ3−4.319μ2−35.57μ+M; wherein M=250−; where μ is provided in m/s and ρ is provided in kg/m3. The method can be used for the industrial production of lower olefin.
A method for regulating the superficial gas velocity in a fluidized bed, wherein solid catalysts are used as fluidized particles or as a part of the fluidized particles, characterized in measuring the superficial gas velocity u of the reaction zone of the fluidized bed, comparing it with the bed average catalyst density p of the solid catalysts in the reaction zone of the fluidized bed, adjusting the superficial gas velocity u as needed so as to allow the superficial gas velocity u and the bed average catalyst density p satisfy the formula (I) below:
Dependencies are inferred from the claim text.