乙烯裂解炉内传递和反应过程综合数值模拟Ⅱ.反应管内传递和反应过程的数值模拟

采用乙烯裂解炉传递反应过程综合数学模型中的反应管数学模型，对工业裂解炉反应管进行了系统的数值模拟，得到了反应管内流场、温度场和浓度场的详细信息，揭示了反应管内流动、传热、传质和裂解反应的基本特点。模拟结果表明，沿反应管轴向油气吸热升温，裂解反应加剧，产物产率逐渐发生变化；沿反应管径向存在明显的流体流速和温度的变化，而产物产率的变化不如流体流速和温度的变化明显。通过比较湍流粘度和分子粘度的大小，认为29．975～30mm的径向区域为层流层，层流层的存在使得临近管壁的区域内流体流速和温度变化显著。     

Adaptation of the microscopic properties of redox catalysts to the type of gas-solid reactor

Catalysts of selective oxidation usually work in a simultaneous redox mode in reactant/air cofed reactors. The solid must provide selective lattice oxygen according to a kinetic mechanism depending on operating conditions that differ from one reactor to another. Better catalytic performance can be obtained in a recirculating solids reactor because it allows separate optimization of the reduction and oxidation steps. Among the microscopic properties of the catalyst, the crystal morphology is to be taken into account because it influences its reactivity on stream. These considerations lead to a new approach of the catalyst-reaction-reactor trio.     

四坐标数控加工原理及算法研究

本文对四坐标数控加工原理和算法作了详细介绍，尤其对四坐标加工的刀轴矢量算法进行了研究，提出了用垂直于回转轴的平面与刀具运动方向和前导角形成的圆锥面求交，生成刀轴矢量的方法，该方法具有立意新颖、思路清晰，性能可靠，易于在微机上实现等特点，对复杂曲面零件的加工编程，具有重要的实用价值。     

液态金属钠高温沸腾实验回路应力分析与强度计算

本文主要完成了液态金属钠高温沸腾实验回路的应力分析与计算，确定了回路高温区连接管系的布置型式和支吊架系统，是该回路总体设计的重要组成部分。     

石方控制爆破的飞石控制

该文分析了石方控制爆破中的飞石产生的原因，提出了控制飞石的方法，对石方控制爆破的飞石控制有一定参考价值。     

S—135钢板热轧工艺研究

S—135钢板是水电站用高强耐磨不锈钢板,既要求强度高、韧性好,又要求耐磨、耐蚀性强,生产难度较大。除我厂外,目前国内尚无其它厂家能够生产这种钢板。该钢板在加热轧制,冷却过程中要解决很多技术难点。我们通过采用特殊的控制轧制和控制冷却工艺,很好地解决了诸多技术难点,使S—135钢板的开发研制取得了成功。为电站用高强度耐磨不锈钢生产提供了宝贵的经验,也为控制轧制及控制冷却技术在中板生产行业的应用起到了积极的推动作用。     

膜催化氧化正丁烷制顺酐

以多孔玻璃管为基体，制备４种用于正丁烷氧化制顺酐的膜反应器。在一定的操作条件下，考察了固定床反应器与这４种膜反应器在正丁烷氧化制顺酐中的反应性能并加以比较，发现ＹＳＺ膜反应器可获得高于固定床反应器的选择性和收率。     

新型废水厌氧处理工艺——内循环厌氧反应器

介绍内循环(IC)厌氧反应器的发展、基本结构、运行机理。分析该反应器的工艺过程,指出该工艺具有处理效率高、抗冲击能力强等优点。针对IC反应器存在的缺陷,人们对该反应器进行技术改进:通过提高它的内循环的气量进行处理低浓度有机废水;增加外循环装置缩短IC反应器的启动周期。     

Optimal Conditions for Preparing Ultra-Fine CeO2 Powders in A Submerged Circulative Impinging Stream Reactor

Cerium carbonate powders were produced in a submerged circulation impinging stream reactor (SCISR) from Ce(NO3)3·6H2O. NH4HCO3 was used as a precipitant in the reaction. Cerium carbonate powders were roasted to produce ultra-fine cerium dioxide (CeO2) powders. The optimal conditions of such production process were obtained by orthogonal and one-factor experiments. The results showed that ultra-fine and narrowly distributed cerium carbonate powders were produced under the optimal flowing conditions. The concentrations of Ce(NO3)3 and NH4HCO3 solutions were 0.25 and 0.3 mol·L-1, respectively. The concentration of PEG4000 added in these two solutions was 4 g·L-1. The stirring ratio, reaction temperature, feeding time, solution pH, reaction time and digestion time were 900 r·min-1, 80 ℃, 20 min, 5～6, 5 min and 1 h, respectively. The final product, CeO2 powders, was obtained by roasting the produced cerium carbonate in air for 3 h at 500 ℃. The finally produced CeO2 powders were torispherical particles with a narrow size distribution of 0.8～2.5 μm. The crystal structure of CeO2 powders belonged to cubic crystal system and its space point group was O5H-FM3M. Under optimal conditions, powders produced by SCISR were finer and more narrowly distributed than that by Stirred Tank Reactor (STR).