共查询到19条相似文献,搜索用时 46 毫秒
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介绍了季戊四醇后序工艺流程存在的问题,并将斗提升机改造为翻斗式提升机,节约经费1万元,保证了季戊四醇安全生产及产量,减轻了劳动强度。 相似文献
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叙述了将BM切片干燥系统的结晶部分由连续式工作改为间歇式工作的技改方法,通过电器控制改造及工艺参数的调整,既保证了正常生产,又达到节电的目的,而且生产品种的终结虎小,节约电能越多。 相似文献
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针对原有的季戊四醇生产中缩合工艺和设备存在的不足提出了改进 ,介绍了一种改进的季戊四醇缩合工艺。该工艺可增加物料的混合程度和分散效果 ,提高缩合釜的生产能力 ,节约能源 ,降低原料消耗 ,产品生产成本可降低 52 7.4元 /t。 相似文献
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对气流干燥的原理、装置、特点以及广泛应用进行了概括论述。通过对干燥器设计计算的论证,证明了具有广泛的现实意义及推广价值。 相似文献
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1前言我厂季成四醇设计能力为1000t加,脱醇塔塔径400,填料高11m,填料为cy型金属丝网波纹填料。该填料分离效率极高,但其通量偏低,生产中进料量仅能达到0.5m3/h,稍有提高就会造成液泛不下料、塔顶严重带料、脱醛塔无法控制等现象。我们用高通量的填料更换了部分cy型填料,并相应调整了缩合液进口位置,同时增加了回流装置,严格控制进料量和出料量,整个改造工作于1994年8月完成,运行至今情况良好,脱醒塔实际处理量达到并超过了原设计能力。2脱醛塔的改造2.1填料选择填料选用250X型板波纹及cy型丝网波纹填料,材质均为ICrl8NigTi… 相似文献
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ABSTRACT In a batch experimental equipment, the behavior of a sawdust dryer in a vibrating fluidized bed is analyzed. Empirical data concerning fluidization velocities, pressure drops and drying kinetics was obtained, and advantages of using vibration in the drying chamber, relative to a conventional fluidized bed, are shown. This technique is presented as an alternative to solve problems of solid agglomeration and bed defluidization. Results show that it is possible to dry sawdust with more than 2 kg/kg moisture, in a vibrating bed keeping a high degree of bed homogeneity and high quality of fluidized state. 相似文献
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介绍了PVC干燥的3种常用工艺并进行了比较,认为流化床干燥工艺在装置规模、蒸汽消耗及产品质量等方面具有优势,是当前新建项目的首选工艺. 相似文献
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分析了变性淀粉工业生产所用的气流干燥装置不能用在中试或者高校实验的原因,同时叙述了变性淀粉干燥设备应具备的条件及选择卧式振动流化床干燥作为中试用变性淀粉干燥装置的原因。设计了变性淀粉中试用小型化卧式振动流化床干燥系统的工艺设计方案,通过纯胶这种新型的变性淀粉进行干燥,从而验证了小型化卧式振动流化床干燥系统可行性及实用性。 相似文献
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A parametric analysis of four fluidized bed dryer operating parameters—initial moisture content, material loading, heating air temperature, and air flux—was carried out using two factorial experimental designs. Two different dryer scales, the Glatt GPCG-1 and MiniGlatt, with chamber volumes of 23 and 3?L, respectively, were used to dry dibasic calcium phosphate powders. According to a Pareto analysis, initial moisture content and air flux were the most significant variables. For the larger GPCG-1, the four variables used in the factorial tests were found to be independent. For the smaller MiniGlatt, the interaction of the initial moisture content and the air flow rate was also significant. From the parametric analysis, it was observed that drying is dominated by the constant drying stage, and zero-order kinetics, for the mild drying conditions (appropriate for many pharmaceutical products) we considered in this work. A comparison of the two dryers and an evaluation of energy efficiency were also carried out. It was found that drying should be carried out with relatively low temperatures and high air fluxes for both the large- and small-scale dryers in order to maximize the energy efficiency. 相似文献