高压射流流道结构对纤维素微细化的影响

The influence on ultra micronization of cellulose from flow passage structure of high pressure jeton

采用计算流体动力学方法研究相同操作压力下不同阀体结构内的压降和速度分布差异,并结合不同阀体结构微细化膳食纤维单一组分纤维素的粒径变化,研究流道结构对纤维素微细化处理的影响。结果表明,纤维素水分散液质量浓度越小,单阀的微细化效果越好;而纤维素水分散液质量浓度(≤2%)对组阀处理的微细化效果无明显影响;阀体结构对微细化效果的影响取决于流道内是否形成大区域和大幅度的流速变化。

The computational fluid dynamics method was used to study the pressure drop and velocity distribution differences in different valve body structures under the same operating pressure,and the particle size changes of the single component cellulose of the micronized dietary fiber of different valve body structures were combined to study the influence of flow channel structure on cellulose miniaturization.The results showed that the smaller of the concentration of cellulose aqueous dispersion was,and the better the micronizing effects of single valve treatment were.The concentration of cellulose aqueous dispersion(≤2%)had no obvious influence on the micronizing effect of group valve treatment.The effects of the valve body structure on the miniaturization effects depended on whether a large area and a large flow rate change were formed in the flow channel.