共查询到20条相似文献,搜索用时 62 毫秒
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关于无机颜填料的超微气流粉碎 总被引:1,自引:0,他引:1
国产的无机颜料质量和档次与国外存在较大的差距。我国在加入世贸组织后,其产品会受到一定的冲击。为改进产品质量,缩小差距,本文综述了气流粉碎技术在制备超微无机颜、填料方面的应用。 相似文献
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为了解决易燃、易爆、易氧化物料的超细粉碎难题,根据可燃粉体爆炸特性,按惰化防爆原理,研发成功惰性气体保护气流粉碎系统。重点论述该系统的工艺、装置、结构特点,探讨其在化工、农药、医药、金属、稀有金属和新能源等行业中的应用,实现了安全、环保、节能、高品质的生产。 相似文献
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气流粉碎过程中的静电问题 总被引:18,自引:0,他引:18
本文报导典型氧化剂高氯酸铵和可燃物赤磷在超细粉碎过程中所产生的静电现象,分析了静电产生的原因,并提出了减少或消除静电的可行方法。这对于进一步研究气流粉碎过程中的静电产生机理、消除静电、防止灾难性事故及确保易燃易爆品或一般可燃物料在超细粉碎过程中的安全都具有一定促进作用。 相似文献
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超音速气流粉碎技术在化学反应中的应用研究 总被引:1,自引:0,他引:1
为了拓宽超音速气流粉碎技术的应用范围,研究了超音速气流粉碎技术在化学研究中的应用.采用超音速气流粉碎技术使碳酸钠与氯化钙/氯化钡混合粉体在反应腔中快速连续撞击反应,制备了超细碳酸钙/碳酸钡,讨论了超音速气流粉碎技术制备碳酸钙/碳酸钡可能的反应机理,发现反应经历了摩擦扩散-撞击断键反应-成核生长三个过程,并且推测超音速气流粉碎法的总反应特性应该表现为摩擦扩散这一决速步骤的特性,研究结果表明超音速气流粉碎技术能用于进行化学反应,方法原理可行. 相似文献
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本文介绍了AC发泡剂超微气流粉碎工艺,讨论了粉碎介质压力、分级轮转速度和产品粒径的关系,最后给出了产品性能参数。 相似文献
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从防燃、防爆、防氧化、环保及防热敏性多重性惰性气体保护气流粉碎系统的结构特点和技术要点出发,探讨了其在化工行业中的应用. 相似文献
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ABSTRACT Pressure drops through oat (Oat Sp.) beds were evaluated in the range of airflow rate from 0·0097 to 0·459 m3/s-m2 using two airflow directions to determine the effect of grain moisture and foreign material on the resistance to airflow. Horizontal airflow resistance was lesser than vertical airflow resistance (e.g., for oat with 9·0% moisture content the pressure drop in horizontal direction was 4–17% of corresponding in vertical direction). The resistance decreased with the increase of moisture content and increased when the fraction of foreign material. An increase in the moisture content from 9·0 to 24·9% produced a decrease on the bulk density from 583 to 513 kg/m3. Mattel's model (1969) fitted adequately the experimental data. The Haque et al.'s equation (1982) have an adequate representation of the data for both airflow directions. The Paterson et al. (1971) and Bern-Charity (1975)equations resulted applicable only for vertical airflow direction. A simplification planed of this model in function of the bulk density conduced to a good relation DP-Q. 相似文献
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合成气压缩机在投用以后,因振动原因达不到满负荷生产,通过对故障现象分析,确定振动由气流激振引发,通过对气封和轴承进行改进,达到了设备稳定运行的目的。 相似文献
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根据聚苯硫酸合成中反应液的颜色变和产物的得率,选择了合理的助剂配方,有效抑制了硫化钠的氧化。提高了反应物的活性,使产物得率提高至96.42%。 相似文献
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ABSTRACT Even drying of stacked timber boards in a kiln depends, amongst other things, on having a uniform airflow through the pile. A study of possible airflow maldistribution in existing kilns has been carried out using a Perspex model of a kiln, with water as the fluid, which has been designed to be geometrically similar to an actual kiln and have dynamically similar flows. Measurements of local velocities were possible by tracing the flow of fine gas bubbles. The standard kiln arrangements result in significant recirculation zones before and after the stack, with a non-uniform incident velocity profile. Different design alternatives for the geometry of the plenum spaces on either side of the stack have been investigated. 相似文献
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助磨剂在陶瓷粉体机械粉碎过程中的助磨作用 总被引:6,自引:0,他引:6
从机械力化学角度探讨了陶瓷粉体机械粉碎过程中助磨剂的助磨作用机理。分析了助磨剂的表面吸附及粉碎过程中影响其作用效果的因素 ,进而指出助磨剂开发研究的趋势 相似文献
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ABSTRACT This paper describes the use of a computational fluid dynamics code (Star-CD)in the food industry. We assessed the capability of CFD to predict airflow patterns in a modern sausage dryer by comparing numerical results with experimental air velocity data. Qualitative and quantitative comparisons showed that simulated values agreed closely with measurements although some discrepancies appeared for specific flow conditions. Using CFD, it was established that these differences couid be attributed to slow time-variations in the blower airflow rate. These comparisons also revealed errors in measurement. 相似文献
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