Solid materials handling and pneumatic conveying system packaged machinery and its equipment and valves are mainly used for conveying , material unloading , dedusting , metering , mixing , packing units in the processing units of the solid materials including powder , particles , powder mixtures and flakes of abs , ps , pe , pp , pom , san , pet , pc , pta , pvc , bpa , sap , as and pmma in the trades of petroleum , chemical industries , chemical fiber , dye , pharmacy , food , electronic , paper making , natural gas , power , environmental protection , metallurgy and etc . . it is applicable for various pneumatic conveying systems and gravity flow conveying systems under the conditions of diluted - phase , densed - phase , high pressure , low pressure and vacuum pressure 固体物料处理和输送系统成套机械及其专用设备、阀门主要应用于石油、化工、电力、化纤、染料、医药、食品、电子、造纸、天然气、环保、冶金等领域中固体物料(含abs 、 ps 、 pe 、 pp 、 pom 、 san 、 pet 、 pc 、 pta 、 pvc 、 bpa 、 sap等粉沫、颗粒物料、粉粒混合物、片状)生产加工过程中输送、卸料、除尘、计量、混合、包装等工段使用，能适用于稀相、密相、高压、低压、负压各种气力输送系统和重力流输送系统。
Finally , the thesis employed the new combined model to simulate the dense gas - solid two - phase vertical flows , to simulate the dilute or dense gas - solid two - phase jet flows , and both of them got a satisfied numerical solution . after comparing the numerical results to experimental data , we found that they were quite agreement . it proves that the new combined model is right , accurate and reliable , and it may be suitable to simulate various dense gas - solid multiphase flows 最后，本文利用所提出的新的组合模型，对高浓度气固两相立管流动进行了数值模拟；对稀相和密相气固两相射流进行了数值模拟；两者均得到了满意的数值解；将所得数值结果与相关实验数据进行了比较，两者十分吻合，证明了本组合法在模拟高浓度气固两相流动时的准确性和可靠性，并具有一定的普适性。
The wavelet multi - analysis is adopted to further understand the microstructure of solids holdup fluctuation , the vivid fingermark images show that it is a fractal and dissipative structure . the low and frequency signals reflect the dilute phase fluctuation behavior and dense phase ( cluster ) fluctuation behavior , respectively . to deep understand the multi - scales characteristic of gas - solids circulating fluidization , the wp decompose methods for obtaining the eigenvalue of gas - solid fluidized bed has been developed . the results show that eigenvalues of different scales are effective for identification of non - uniform and dynamic structure of gas - solid fluidized bed 小波多分辨分析法得到指纹图形象地揭示了颗粒浓度脉动的自相似、分叉等具有混沌特征的微观结构；小波分解后信号中的低频和高频成分分别代表了稀相和密相的脉动行为，小波包分解提取能量特征值的方法能够揭示气固的多尺度特性，不同尺度上的能量特征值四川大学硕十论文反映了气固循环流化系统中存在的非均匀动态时空结构。
