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在不通气的情况下,对新型多相搅拌槽进行实验,得出了其固相含量ω、颗粒密度ρ、搅拌槽内径D与临界悬浮转速Nc的关系,在相同条件下,与给定结构尺寸的标准搅拌槽对比了临界悬浮转速.结果表明,Nc随固相分率增加和粒径dp增大而增大,不利于达到良好的悬浮效果;固相颗粒密度越大,临界悬浮转速随之增大;槽径增大使达到悬浮状态的临界转速降低.该新型搅拌槽临界悬浮转速的关联式是N0.21c=6.3dp(gΔρ/ρL)0.45ω0.19/D0.55;同一固相分率下,新型多相搅拌槽的临界悬浮转速比标准搅拌槽降低了30%,在较低转速下就能使颗粒悬浮.
In the case of no aeration, the new multi-phase stirred tank experiments were obtained, the solid phase content ω, particle density ρ, stirring tank inner diameter D and the critical suspension speed Nc relationship under the same conditions, with a given structure Size of the standard stirred tank contrast critical suspension speed.The results show that Nc increases with the solid fraction increases and the particle size dp increases and is not conducive to achieving good suspension effect; solid phase particle density, the critical suspension speed The critical speed of the new stirred tank is: N0.21c = 6.3dp (gΔρ / ρL) 0.45ω0.19 / D0.55; the same solid At phase fraction, the critical hovering speed of the new multiphase stirred tank is reduced by 30% compared to the standard stirred tank, allowing particles to be suspended at lower speeds.