皮带输送机落料点和中转站抑尘装置技改

皮带输送机落料点和中转站粉尘污染治理一直是企业头痛的顽疾问题，并且随着现代化和工业化的发展进程，大气污染日益严重，工业粉尘是大气污染的重要污染源，扬尘综合整治迫在眉睫。通过皮带输送机中转站扬尘分析及技术攻关，采取有效措施，解决了这一问题及困境，为同行业有类似工况的企业提供参考。     

Muscular fatigue and maximum endurance time assessment for male and female industrial workers

A single arm pushing experiment was conducted in an electronic factory in Yantai, China to assess muscular fatigue using the theoretical models of muscular strength and maximum endurance time (MET) developed by Ma et al. (2009). Seventy seven workers, including 38 males and 39 females, participated in the study. The muscular strength of pushing was measured after the subject pushed a stick, with a force of 2.5 kgf, for 0.5, 1.0, 1.5, 2.0, 2.5, and 3.0 min. Fatigue rate was determined based on a regression approach. In addition to the theoretical model, the MET for such a pushing task was also determined using four empirical models in the literature. The results indicated that females were more resistant to muscular fatigue than males in the pushing task. The results of the muscular strength prediction show that the predictability of the muscular strength model is acceptable. The prediction errors for muscular strength for female subjects were significantly lower than those of the male subjects. The predicted MET using the theoretical model, with a group constant k, was highly correlated with those using the empirical models compared in the current study.     

氯酸钠-硫磺法制二氧化氯的研究

对硫磺还原氯酸钠制备二氧化氯的工艺条件进行了研究 ,反应的最佳条件是 :温度为 60～70℃ ,氯酸钠浓度为 4～ 5 mol/L,反应液中维持硫酸浓度为 1 mol/L以上。该法具有反应温和易于控制、硫酸消耗少、成本低廉和产品纯度高的优点     

中微孔复合分子筛的合成研究开发进展

综述了复全分子筛合成的研究进展，介绍了原位合成法，离子交换法和纳米组装法。分析比较了各种合成方法的特点，讨论了方法的适用范围，指出复合分子筛的合成中存在的一些问题，认为合成具有大－中－小孔梯度分布的复合物和用硅铝纳米簇进行自组装合成中孔材料将是今后发展的主流。     

高效节能水力旋流器研究进展

综合介绍了国内外高效节能水力旋流器的研究进展,分析了影响旋流器分离性能和能耗的主要因素,介绍了针对不同问题提出的相应解决办法.对其迄今的研究成果进行了简要评述,并对其发展进行了展望。     

Packed-microtubes model for flowthrough chromatography of protein

A mathematical model for flowthrough (perfusion) chromatography, namely packed-microtubes (PMT) model, has been proposed for a column packed with biporous (BiP) anion exchanger in which the mesopores and flowthrough pores are created with liquid and solid porogens, respectively. The model is established based on the assumption that the BiP particle is made up of packed microtubes. Bovine serum albumin (BSA) is used as a model protein and three kinds of anion exchangers (i.e., mesoporous, macroporous and BiP resins) are used as adsorbents to determine the model parameters and to evaluate the model. Adsorption equilibrium and finite bath experiments are performed to determine the adsorption isotherms and kinetics parameters. Both the bound amounts of the protein on the surface of the mesopores and macropores are experimentally determined and taken into account in the mathematical model. With all the model parameters determined by independent experiments or calculated from available correlations, model simulations are performed and compared with the experimentally determined breakthrough profiles of the BiP column. It is found that the model predictions agree reasonably well with the experimental data obtained under various conditions and the PMT model fit experimental data better than the modified double linear driving force (LLDF) model proposed by Leitão and Rodriogues (1999. Biochemical Engineering Journal 3, 131) in which the adsorbent particle is considered to be made up of packed microparticles. The results indicate that the PMT model is more reasonable for this kind of BiP adsorbent.     

螺旋齿轮塑件注塑模设计

分析了斜齿轮塑件的工艺特性,给出了实用的注塑模结构,介绍了斜齿轮注塑模各系统的结构设计,论述了模具的工作原理。该模具利用定模推出机构和推管旋转脱模机构解决了螺旋齿轮脱模难的问题。模具结构紧凑,推出可靠,安装维修操作方便,成型塑件质量好,生产效率高。     

制作和生产颜色釉的体会

陶瓷企业目前都面临着原料紧缺、价格上涨的问题,随着生产成本上涨和产品价格竞争的加剧,目前白坯瓷的利润很低。从这两年广交会的情况看,市场上经营的颜色釉较多,价格也较高。如果能研制生产出颜色釉,且价值还是可观的。笔者对颜色釉做大量的实验,从中获取了一些体会,希望对大家有所借鉴。1颜色釉的生产和工艺控制颜色釉在生产前都要进行中试,其结果有时会出现和封样呈色不一致现象。例如,我们公司在2004年10月份投产了深灰、浅灰和浅黄3种釉,将釉送到车间进行中试,发现3种釉色调变化都很大,其中深灰釉泛绿色,浅灰釉泛白而且欠红调,浅黄釉…     

影响邻二甲苯进料负荷的技术分析

对苯酐生产中影响邻二甲苯进料负荷的主要因素进行了定性分析，从而为实际生产操作过程的调整及高负荷催化剂的开发提供了理论依据。     

阳极氧化工艺对氧化铝纳米孔膜形成过程及结构的影响

采用高纯度的铝片为阳极，以铂网为阴极，在3％～5％草酸溶液中，电压在30～70V，温度控制在17～25℃范围内进行恒压阳极氧化制备氧化铝膜，并采用环境扫描电镜观察纳米孔形貌，金相显微镜测量氧化膜厚度。研究了电解电压、电解液浓度、温度等条件对氧化铝多孔膜结构的影响。结果表明：氧化膜形成速度、纳米孔孔径、胞径、孔壁厚度、氧化膜厚度受电解电压影响显著，随着电解液浓度和温度的增大，氧化膜生长速度加快，纳米孔孔径、孔壁厚度等都随之增大，在相同时间内生成的氧化膜厚度增大。