冷却塔改造

在冷却塔改造中，淋水填料和配水喷头的选择是提高热力性能的关键。本文详细介绍了淋水填料与配水喷头的选择     

高山电视塔腐蚀与防护

对5座高山电视塔在自然环境下金属腐蚀与防护进行了调查和分析研究,寻求其规律性,以便在今后建设中有针对性地改进抗蚀措施,提高并延长其结构使用寿命,更好地为广播电视宣传服务。     

广州城市人工水系统中军团菌的发生和分布

综合运用平板分离法、半巢式PCR和EnviroAmp PCR反向杂交检测试剂盒，对广州市部分人工水系统中条件致病菌军团菌属细菌进行分离和检测．结果表明，虽然阳性率随着采样时间和地点的不同而有所差异，但总体来说，广州市人工水系统中存在较高程度的军团菌的污染，中央空调冷却塔水中军团菌阳性率平均为84％，个别路段甚至达到了100%，自来水池中则达到了35％，，但在后者的水样中没有检测到最常见的致病菌嗜肺军团菌．对各种培养方法的优劣及军团菌的季节性发生和分布进行了初步讨论．图2表2参16     

喷雾增湿设备的数学模拟设计

系统论述了喷雾增湿塔内水滴的运动状态与含尘气体的流动特性,建立了一个能反映喷雾增湿操作过程的数学模型,有助于确定该设备生产操作中的最佳控制参数.     

Enumeration of Legionella pneumophila in cooling tower water systems

Legionella pneumophila, the causative agent of Legionnaires disease, is known to colonise and frequently grow in cooling tower waters. Disease is acquired by inhaling aerosol contaminated by legionellae. Determination of the count of Legionella pneumophila in cooling tower waters may, therefore, be useful for risk assessment. In our survey, 103 water samples from 50 cooling towers were examined over a five-year period to indicate the seasonal distribution and the ecology of L. pneumophila, as regards temperature and pH. L. pneumophila serogroup 1 was found in 44% of the isolated strains, which is primarily responsible for the majority of Legionnaires disease. The large majority of examined towers had levels of L. pneumophila in the high-risk category. These cooling towers have been linked to many outbreaks of Legionnaires disease.     

一起塔式起重机臂架断裂事故分析及预防

通过对一起塔式起重机臂架断裂事故的分析，从设计、制造、使用及维修管理等不同角度指出了事故的原因并提出了建议及对策。     

Behaviour of smoldering fires during periodic refilling of wood pellets into silos

The evolution of smoldering fires in biomass stored in lab-scale silos with additional fuel material supplied repeatedly, has been studied. The direct effects of the added material on the sample are: cooling, enhanced thermal insulation, and facilitation of more intense combustion at a later stage. This article focuses on the cooling, which leads to an almost instantaneous reduction in the combustion rate. Surprisingly, this reduction does not vary only with the amount of material refilled – but also depends strongly on the stage of the smoldering process. This demonstrates that the underlying smoldering processes merely to a certain degree are regularized by the periodic refillings. Quantitatively, the functional relationship between the refilled amount and the change in combustion rate caused by the refilling was determined. The results displays four regimes, that reflect different stages of the smoldering process at the time of the refilling. Using the Arrhenius equation, we find for one of these regimes an expression for the ratio of combustion rates (immediately after to immediately before the refill) as function of the amount of added material. This expression contains only one free (undetermined) parameter. We determine the value of this parameter from the data and demonstrate that this value is consistent with a simple model for how the sudden cooling occurs spatially in the sample.     

铁塔近地层风场特征研究

基于对铁塔近地层风场的观测资料,采用统计分析方法,以夏季为例对铁塔近地层风场的平均风速、平均风向、最大风速、阵风、低空风切变等进行了分析研究,给出了夏季近地层风场的分布特征。     

低浓度氯苯废水在曝气生物填料塔中的降解

研究了曝气生物填料塔处理难生化降解化合物氯苯的特性,得出初始浓度为15mg/L的氯苯废水的适宜运行条件为:溶解氧约为5.5mg/L,水力停留时间约为5h,葡萄糖浓度为800mg/L,在此条件下单独用生物填料塔处理60h降解率可达16.80%。并考察了氯苯废水用超声预处理后生物降解与直接用生物降解比较,结果表明超声预处理可大大提高氯苯的可生物降解性,在30kHz+60kHz+100kHz的频率组合下超声预处理2h后再生物降解38h,氯苯的降解率可达70.12%。     

高海拨地区建筑用塔机的防雷措施

建筑用塔机雷击事件时有发生，而塔机的防雷装置却常被人们忽视，应引起设计、安装、检验，用户等相关单位的重视，以期达到塔机安全防雷的目的。