共查询到17条相似文献,搜索用时 78 毫秒
1.
2.
3.
4.
5.
6.
7.
对流化床干燥玉米的试验数据进行了理论分析,利用Page方程和扩散方程拟合试验数据,得到了流化床干燥玉米的数学模型,并将两种模型进行了分析比较。 相似文献
8.
聚丙烯流化床降温干燥数学模拟 总被引:3,自引:0,他引:3
分析了聚丙烯流化床干燥器(D502)的特点,根据其特点建立了降温干燥数学模型,确定了模型成立的条件,采用工业数据进行了计算分析,该模型具有实用价值。 相似文献
9.
10.
过热蒸汽流化床干燥装置 总被引:2,自引:0,他引:2
结合过热蒸汽干燥和流化床干燥的各自特性,开发出一种新型的过热蒸汽流化床干燥装置,阐述了工作原理。以卧式多室过热蒸汽流化床干燥装置干燥酒糟为例进行了工艺设计和计算,在保证稳定工作的条件下,干燥室内的绝对压力为0.3MPa,干燥室进出口的工作介质温度分别为180℃和140℃,最佳操作流化速度为2.6m/s。试验结果表明:该卧式多室过热蒸汽流化床干燥装置具有干燥速率大、热效率高、被干产品质量好和干燥操作成本低等优点,特别适宜于初始湿分高而加工附加值低的农产物料的干燥。 相似文献
11.
12.
13.
在目前己二酸生产中,用于固体物料干燥的代表性工艺是气流式及沸腾床式2种,对2种T艺在己二酸干燥中应用进行了综合性比较。 相似文献
14.
V. A. Silva-Moris 《Drying Technology》2013,31(3):303-313
ABSTRACT Adipic acid is a white crystalline solid and is the most industrially important of all aliphatic dicarboxylic acids. Drying is the principal unit operation after its crystallization. The acid has a tendency to agglomerate when moistened, due to its high cohesiveness. The fluidization regime does not occur and the particles cannot be adequately treated in a conventional fluidized bed. This article deals with the drying of adipic acid in a vibrofluidized bed. The equipment used in the drying tests was specially designed and constructed to maintain the fluidized regime of fine particles of moistened adipic acid. The drying curves presented the constant and the falling rate periods, yielding final moisture contents that depend mainly on the drying temperature. The quality of the dried acid was also verified by the crystals' granulometric analysis, which showed breakage of crystals for drying at higher air temperatures. Results showed to be satisfactory for drying adipic acid with moisture content up to 5.1% w.b. in the vibrofluidized bed, keeping a high degree of bed homogeneity and quality of the fluidized state. 相似文献
15.
Adipic acid is a white crystalline solid and is the most industrially important of all aliphatic dicarboxylic acids. Drying is the principal unit operation after its crystallization. The acid has a tendency to agglomerate when moistened, due to its high cohesiveness. The fluidization regime does not occur and the particles cannot be adequately treated in a conventional fluidized bed. This article deals with the drying of adipic acid in a vibrofluidized bed. The equipment used in the drying tests was specially designed and constructed to maintain the fluidized regime of fine particles of moistened adipic acid. The drying curves presented the constant and the falling rate periods, yielding final moisture contents that depend mainly on the drying temperature. The quality of the dried acid was also verified by the crystals' granulometric analysis, which showed breakage of crystals for drying at higher air temperatures. Results showed to be satisfactory for drying adipic acid with moisture content up to 5.1% w.b. in the vibrofluidized bed, keeping a high degree of bed homogeneity and quality of the fluidized state. 相似文献
16.
硝酸氧化环己酮是反应速度既快又复杂的氧化反应。为提高己二酸的收率及实验的安全性,本实验对反应的温度、硝酸的浓度、原料的配比及催化剂的用量等进行了实验分析。通过实验,确定了对提高己二酸的收率的反应条件。该实验操作方法简单、安全、产率高、可操作性强。 相似文献
17.
以分子氧、环己烯为原料,以乙酸为溶剂,开展了己二酸的合成研究.探讨了各步反应中的主要影响因素,如环己烯臭氧化中乙酸用量、臭氧化温度,以及氧化分解反应中的H2O2与环己烯物质的量比、氧化分解温度和时间对反应的影响.建立了由分子氧和环己烯合成己二酸的适宜反应条件,即:乙酸30 mL,臭氧化温度为5~10 ℃,n(H2O2)∶n(C6H10)约为2.4∶1(以2.8 mmol环己烯计),氧化分解温度为75 ℃,反应时间为3.5 h .在该条件下,三次平行试验合成己二酸的平均收率为80.4%. 相似文献