德国型结片机的结构特点及其改进措施

介绍了德国型结片机的结构特点,总结了该结片机在运行过程中存在的缺陷,并提出了相应的改进措施。     

邻苯二胺大型结片机结构改进与应用

针对邻苯二胺结片机存在单机产能小、密封性能差、刀片调节精度低、产品厚度及大小不均匀等问题,对现有结片机进行结构优化、改进,制造了1台大型结片机,并成功应用到2万t/a邻苯二胺装置。     

中国昊华化工(集团)总公司科技成果精选

转鼓结片机　　一、设备简介转鼓结片 (干燥 )机是硫化碱、铬酸酐、石油树脂、平平加、苯酐、顺酐等熔融物料结片及淀粉、磷酸盐、染料等浆液状物料干燥的关键设备。二、设备结构及工作原理转鼓结片 (干燥 )机由转鼓、刮刀系统、料盘、机架、机罩及传动系统等组成。转鼓是本设备的核心。转鼓结片是一个冷却结晶过程 ,料盘中熔融料液与冷却的转鼓接触 ,在转鼓表面形成料膜 ,通过料膜与鼓壁间的换热 ,使料膜冷却、结晶。结晶的料膜被刮刀刮下 ,成为片状产品。转鼓干燥是通过转动的转鼓 ,以热传导方式 ,将附在转鼓外壁的液相物料或带物料进行加…     

片碱生产过程中节能降耗的探索

在明火加热熬制片碱生产中采取措施延长熬碱锅使用寿命、改造结片机提高单机产能、回收碱尘,达到了节能降耗的目的。     

HDPE装置干燥机出料含结片的原因分析与对策

兰州石化HDPE装置滚筒回转式干燥机出料含有结片的情况给生产带来了很多问题,本文统计了从2007年10月起六个月内结片的出现情况;分析了出料含有结片的原因,提出了具体操作中减少结片的相关措施以及消除结片对挤压造粒工段影响的方法。     

片碱机使用总结

分析了片碱机使用中存在的问题,如驱动装置故障频繁,转鼓因采用碳钢材质而使用寿命短;针对刮刀更换频繁,碱槽易变形、腐蚀提出了运行注意事项。     

离子膜片碱装置的国产化

分析了5万t／a离子膜片碱装置关键设备——片碱机转鼓的破坏原因，对材质的选用进行了论证，自行设计并制作了转鼓，投入使用后，设备的换热效果及片碱质量均达到了预期的要求。     

UNIPOL聚乙烯反应器结片的原因及预防措施

针对UNIPOL聚乙烯装置反应器经常发生结片、结块而导致停车的问题,本文总结了反应器结片和结块的现象判断依据,并综合分析了反应器结片、结块产生的原因以及影响。根据装置开工以来的经验总结,提出了有效的预防措施,从而确保装置能够安全、稳定、长周期运行。     

滨化集团自行设计10万t／a国产化片碱装置运行稳定

滨化集团股份有限公司子公司山东滨化东瑞化工有限公司规划的10万t／a片碱项目已于2010年9月底一次开车成功,现已运行7个多月。该装置实现了关键设备国产化（比如最终浓缩器、预浓缩器、结片机、熔盐炉、燃烧器等关键设备）、技术自主化,     

三聚甲醛片状结晶体的开发与应用研究

针对三聚甲醛商品化以后，在运输和使用过程中普遍存在溶解不完全的问题，结合三聚甲醛自身的物理性质，利用冷凝结片机，开发了三聚甲醛片状结晶体，并对三聚甲醛片状结晶体生产过程中影响产品产量和质量的因素进行了研究。先后考察了冷凝结片机转鼓的冷却水温度、转速、刮刀等对三聚甲醛片状结晶体的影响，三聚甲醛溶液的pH值对三聚甲醛片状结晶体溶解性的影响，同时还考察了转鼓、料槽液位等因素对三聚甲醛片状结晶体生产的影响。结果表明：当冷却水温度为10℃、转鼓转速为12 Hz、三聚甲醛pH值为6～6.5时，得到的三聚甲醛片状结晶体产量、质量最优、溶解性较好，满足三聚甲醛行业及下游各种客户的使用要求，开发了冷凝结片机在加工三聚甲醛片状结晶体中的新用途。     

结片机刮刀机构的改进设计

分析了结片机刮刀机构刮料过程中存在的问题和产生的原因,结合引进装置刮刀机构的特点,进行了改进并取得良好效果。中     

变频调速型50 m2转鼓真空过滤机结构设计与应用

介绍了自行研制的变频调速型 50m2 转鼓真空过滤机工作原理、结构设计及应用情况。     

Kristallisation aus Schmelzen

Crystallization from melts . Equipment for crystallization from melts differs considerably from the solution crystallizer. The article discusses: Trough crystallizers, belt crystallizers, pastillators, flakers, screw crystallizers, and prilling towers. The kinetics of melt crystallization is simpler than that from solution, and the secondary nucleation becomes less important. Environmentally, crystallization from melts is more attractive because absence of solvent obviates waste products. Dust problems are avoidable by flaking, pastillizing, and prilling.     

污泥干燥焚烧一体化中热量计算的探讨

介绍了几种常用的污泥干燥焚烧一体化技术及其设备,分析了污泥在转筒干燥-循环流化床焚烧一体化设备中的热量输入、输出过程,对污泥干燥以及焚烧设备的设计有一定的参考价值。     

辊筒式采样器的设计及应用

介绍了辊筒式采样器的结构及特点，并详述了取样过程与应用效果。     

Optimization of Drum Drying Parameters for Low Amylose Rice (KDML105) Starch and Flour

An attempt was made to study and model the effects of drum drying process variables on the physico-chemical properties of low amylose rice (KDML105) flour and starch. Drum surface temperature, holding time and solid content of the slurry were varied at three levels: 115-135°C, 14-84 s and 20-40%, w/w, respectively. The dependent variables were moisture content (MC), degree of gelatinization (DG), water absorption index (WAI), water solubility index (WSI) and pasting property. High solid content led to a decrease in DG, WAI and initial peak viscosity (IPV) and increase in WSI of dried samples. Longer holding time resulted in increased DG while surface temperature had no significant effect on all characteristics. Predictive correlations were developed using stepwise multiple linear regression to predict MC, DG, WAI, WSI, and IPV of dried products from drum drying variables.     

Optimization of Drum Drying Parameters for Low Amylose Rice (KDML105) Starch and Flour

Abstract

An attempt was made to study and model the effects of drum drying process variables on the physico–chemical properties of low amylose rice (KDML105) flour and starch. Drum surface temperature, holding time and solid content of the slurry were varied at three levels: 115–135°C, 14–84 s and 20–40%, w/w, respectively. The dependent variables were moisture content (MC), degree of gelatinization (DG), water absorption index (WAI), water solubility index (WSI) and pasting property. High solid content led to a decrease in DG, WAI and initial peak viscosity (IPV) and increase in WSI of dried samples. Longer holding time resulted in increased DG while surface temperature had no significant effect on all characteristics. Predictive correlations were developed using stepwise multiple linear regression to predict MC, DG, WAI, WSI, and IPV of dried products from drum drying variables.     

1000t·d~(-1)回转窑设备的调试

随着活性石灰回转窑规模化、系列化、工业化的发展,越来越多的1 000t·d-1回转窑设备经过调试后已投入到使用中去。经过规范系统调试后的回转窑设备,不仅会发挥最高效用,还具备最佳的使用寿命。     

Experimental Apparatus for Studying Heat Transfer in Externally Heated Rotary Kilns

Rotary kilns are widely used in several branches of the chemical industry. In order to control the temperature of the solid and the gas flowing through the kiln, it is important to understand the heat exchange phenomena that occur. The design and construction of a novel experimental device to study heat exchange in rotary kilns is described. The device, which comprises a rotary kiln equipped with an external electrical heating system, enables the study of the influence of various parameters such as the solid flow rate, the kiln inclination angle, the rotational speed, or the presence of lifters on heat exchange and in particular on the heat exchange coefficient between the solid and the wall. Preliminary experimental results concerning the influence of the solid flow rate and the rotational speed on the solid‐to‐wall heat exchange coefficient are presented.