共查询到19条相似文献,搜索用时 125 毫秒
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介绍了磷铵喷浆造粒干造机的改造。为强化造粒、干燥、分级过程而采取的一系列设备结构的改进措施及采用全内返料造粒、干燥技术而产生的社会和经济效益的分析。 相似文献
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喷浆造粒干燥窑的返料陈应斌(安徽铜陵磷铵厂)在磷铵生产过程中,要得到合格的成品粒子,可采用喷雾造粒、滚筒造粒、圆盘造粒、挤压造粒、管式反应造粒(实际上也是一种喷雾造粒)等几种方法。影响成品粒子的因素很多。其中返料是一个重要因素。下面就铜陵磷铵厂的喷浆... 相似文献
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全内返料喷浆造粒干燥机是集喷浆、造粒、返料、分级、破碎于一体的高效设备,具有结构紧凑、单机生产能力大、单位能耗低、适应性强、工艺成熟等优点,在磷复肥等领域获得广泛应用。本文介绍了全内返料喷浆造粒干燥机研究进展及成果。 相似文献
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设计磷铵用全内返料喷浆造粒干燥机的关键是返料螺旋的确定,返料的前提是颗粒在回转圆筒内充分有效的分级。本文通过理论分析与简单的几何变换得到了返料螺旋口高度的计算公式,实验验证并得到修正系数。该公式为返料螺旋的确定提供依据 相似文献
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对我国10年来磷铵喷浆造粒干燥机实现内分级,内破碎,内返料的一体化,即“三内”技术的发展和应用情况进行了总,指出了“三内”技术目前的状况和已解决的主要问题。 相似文献
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内返料内分级喷浆造粒干燥机的返料分级机理研究 Ⅵ.悬浮式螺旋进… 总被引:1,自引:0,他引:1
本文研究内返料内分级喷浆造粒干燥机中悬浮式螺旋进料口的有效返料系数。推导出有效返料系数的计算式,讨论了螺旋进料口和悬浮高度、转筒半径和装载系数对有效返流系数的影响。 相似文献
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高浓度复合肥叶面喷施对棉花营养效应的研究 总被引:1,自引:0,他引:1
田间试验结果表明,棉花叶面喷施含硼磷酸钾铵、磷酸二氢钾和磷酸二氢钾铵均可增强植株抗病力,提高棉花产量2.47%~11.92%,改善棉花纤维整齐度、单纤强力和成熟系数。 相似文献
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介绍了几种静电喷粉快速换色方法,采用滤芯回收系统可解决喷粉快速换色,阐述滤芯分离粉尘的机理,以及滤芯的性能要求,讨论了集中滤芯回收系统和分体式滤芯侧回收系统的工作原理及其应用。 相似文献
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基于旋转编码器的喷涂线控制系统设计 总被引:1,自引:0,他引:1
根据喷涂流水线的工作流程及控制要求,设计了基于PLC的喷涂线喷枪控制系统,该系统是由光电传感器检测工件的位置、旋转编码器和PLC内部的高速计数器实现工件的位置控制,并通过PLC的运算和逻辑控制能力控制光电传感器和旋转编码器的信号,以实现对喷枪工作状态的控制. 相似文献
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The influence of potential heat exposure during spray drying on the oxidative stability of spray dried orange oil was studied. The design of some of the table top spray driers expose dried product to dryer exit air temperatures in the powder collection chamber or on the walls of the dryer if there is an accumulation of material on the drying chamber walls. This heat exposure may accelerate oxidation of the product in subsequent storage. To determine the potential for heat damage to affect oxidation of the powders produced, an orange oil infeed emulsion (carrier material - modified starch) was prepared and spray dried using the sample collection chamber supplied by the manufacturer as standard equipment. The spray dryer was then modified to extend the collection chamber inlet such that the product remained cooler than in the standard collection chamber. In this study, the spray dryer was operated for 1?h (inlet air temperature; 180°C and an exit air temperature; 100°C). Thus, the spray dry product could have been exposed to as much as 1?h of heating in the collection chamber (potentially at temperatures as high as the exit air temperature). In the case of spray drying with a collection chamber extension, the collected product was maintained at ca. room temperature. This would approximately mimic the heat exposure powders receive in an industrial spray dryer. Powders produced using both equipment designs were taken from both the collection and drying chambers, adjusted in water activity (0.33) under a nitrogen environment, and then put into storage in an incubator maintained at 35°C for 4 weeks (exposed to air). The ratio of limonene oxide to limonene was used to monitor oxidation using gas chromatography. This study showed a substantial increase in rate of oxidation of the spray dried powder from the table top spray dryer with the standard commercial collection chamber and much less in case of an extended collection chamber. The powder from the respective drying chamber also showed a higher rate of oxidation in comparison to its collection chamber. Thus, we urge researchers studying heat damage (e.g., oxidation) of powders produced on the table top dryers to be conscious of overestimating heat damage during drying. 相似文献