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本文从工艺平面布局、设备选择、空调除尘系统设置等方面对药厂固体制剂车间的粉尘控制进行探讨,提出了在工艺设计过程中,有效控制粉尘的方法。 相似文献
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本文阐述了目前国内成品油长输管道中,混油处理装置生产工艺、设备等方面存在的安全生产隐患,对隐患产生的原因进行分析,建议混油处理装置主要工艺设备设计选型和选材应该满足工艺条件和生产要求。 相似文献
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对用于石墨电极生产的两种混捏系统的设备组成、主要工艺参数、工作原理、混捏质量进行对比分析,探讨了两种混捏系统对石墨电极质量的影响,为提高石墨电极的质量品质和新在建电极生产线中混捏系统的设备选型提供参考。 相似文献
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This is an experimental study of the tensile strength of solid bridges between primary particles comprising granules of lactose or mannitol. We report on two systems: granules prepared with ethanol granulating solutions, in which the base powders were at most sparingly soluble, and aqueous granulating solutions, in which the base powder solubility was large. Both systems were studied with and without hydroxypropylcellulose (HPC) or polyvinylpyrrolidone (PVP) or surfactants (Triton-X100, sodium lauryl sulfate or polysorbate 80) added to the granulating solution. The interparticle bridge strength was determined from the granule crush strength with a simple model that assumes that solid bridges form by evaporation of solvent from liquid bridges that maintain their shape during drying.Lactose granules prepared with pure ethanol are very weak, with crush strength comparable to that predicted by JKR theory, consistent with its negligible solubility. Mannitol, which is sparingly soluble, forms granules with bridge strength similar to the theoretical (Griffith) strength of a pure mannitol. Addition of HPC or PVP to the granulating solution produces bridges with strength comparable to that of pure polymer films. In comparison, the behavior of granules prepared with aqueous granulating solutions was much more complex due to the high saturation concentration of base powder. Granules produced with pure water had bridge strength approximately 20% of the theoretical strength. Addition of HPC or PVP to lactose granules increased the bridge strength modestly, but the strength was much smaller than that of the corresponding pure polymer films. Addition of HPC to mannitol granules had little effect on bridge strength, while PVP reduced bridge strength by approximately 30%. Addition of surfactants to the granulating solution also reduced dry bridge strength. These results reflect the complex microstructure and resulting mechanical properties of dry bridges produced by coprecipitation of the sugars and polymers (or surfactants). 相似文献
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文章以剩余污泥作为研究对象,研究了调理压榨后污泥制备污泥衍生燃料及其成型、燃烧特性和热值情况。结果表明:调理段添加的复合调理剂配方能实现有效调理,干基处理效率达0.008 kg/h/m2。添加木屑的污泥衍生燃料成型效果最佳,燃料成型率为88.33%,轴向抗压强度为2.06 MPa,跌落强度为57.10%。污泥衍生燃料的燃烧性能明显优于污泥单独燃烧,添加木屑和稻杆比添加甘蔗渣的燃烧过程更为稳定、均匀。添加木屑、稻杆、甘蔗渣的污泥衍生燃料低位热值分别为16513 kJ/kg、13911 kJ/kg、8840 kJ/kg,说明该工艺制得的污泥衍生燃料可作为燃料使用或焚烧处置。 相似文献
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Disign of granulating plates and granulating drums. Equations relating mechanical and geometrical parameters have been derived for use in calculating the power requirements of granulating plates and granulating drums. An attempt is made to maintain the same product properties, especially the porosity and size of the agglomerates, on scale-up of the granulating equipment. This condition considerably limits the possible operational parameters. In order to define the operating conditions on scaling-up from model experiments, their influences are described in terms of theoretical models and empirical results. The utility of the expressions derived is illustrated using the design of a granulation plate as example. 相似文献
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采用夹套对造粒塔内的气粒两相流体进行冷却是一个既有多相流对流换热、单相流对流换热,又有固体导热不同流体之间相互作用的复杂过程.采用分区耦合的计算方法对该过程进行模拟,获得了造粒塔和夹套内详细的温度分布.考察了冷却水入口 温度、冷却水总量和3段夹套的冷却水比例对造粒塔内温度的影响.结果表明,冷却水入口温度显著影响造粒塔内... 相似文献
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