循环冷却水处理技术面临新的形势和挑战

循环冷却水处理不仅要求处理效果好，能够保证生产装置长周期运行，而且要求实现节水、减污，达到水处理技术与经济运行的综合最佳。中石化循环冷却水处理，经过20余年的努力，取得很大进步，但新形势对水处理提出了更高的要求，循环冷却水处理技术正面临新的机遇和挑战。     

循环冷却水中军团菌的控制

随着我国社会经济的不断发展,循环冷却水系统在工业、商业和民用设施以及大型公共设施中的应用日益广泛。然而,这些水系统在给人们生活带来便利的同时,也为一种严重危害人类健康的细菌——军团菌创造了滋生的场所。国外对军团菌的研究报道已经很多,有些国家甚至已经开始为控制军团菌进行立法,然而国内在这方面的报道很少,研究也不多。因此,通过对军团菌、军团病以及控制军团菌的方法的介绍,唤起全社会对军团菌的关注。     

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     

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.     

再生水水质对冷却水系统结垢的影响研究

通过单因素实验和正交实验,考察了再生水回用过程中,水质对回用系统结垢的影响。结果表明,Ca2+、HCO3-、PO43-和温度是导致冷却水系统结垢的4个最重要因素,NH4+-N对冷却水系统结垢表现出一定的抑制作用。     

基于环路热管的冷却系统实验研究

为了提高铁路车辆牵引变流器冷却系统技术水平,满足铁路车辆装备发展需求,针对热控领域先进技术环路热管进行了冷却系统实验研究.在阐述环路热管基本原理、实验系统搭建及参数设置的基础上,从气动特性和运行特性2个方面对实验结果进行数据分析,以期为今后牵引变流器及其他铁路大功率电子设备冷却技术的发展提供新思路及备选方案.     

Austal 2000应用于国内“烟塔合一”类项目大气影响评价

简述了德国"烟塔合一"类大气污染扩散模式,以及相关模式Austal 2000的应用方法,修正了气象参数以适合本地化应用。以天津某电厂为实例,将Austal 2000模式"烟塔合一"和烟囱排烟方式的计算结果进行了对比分析。结果表明,在进行本地化修改后,Austal 2000模式适用于国内有关项目大气预测评价,但从环境影响角度考虑,"烟塔合一"相对于高烟囱排放方式没有明显优势,应用时需慎重。     

燃煤电厂“烟塔合一”技术在环评技术评估中存在的问题与建议

介绍了国内外燃煤电厂“烟塔合一”技术的应用现状,阐述了我国已评估“烟塔合一”燃煤电厂的特点,重点对我国采用此技术的项目环评技术评估情况进行了分析,并针对评估中存在的预测结果不确定及复核困难、环境影响认识不统一等问题提出了相关建议。     

Monitoring of Biofilm-associated Legionella pneumophila on Different Substrata in Model Cooling Tower System

Cooling towers have the potential to develop infectious concentrations of Legionella pneumophila. Legionella counts increases where biofilm and warm water temperatures are present. In this study, biofilm associated L. pneumophila and heterotrophic bacteria were compared in terms of material dependence. Model cooling tower system was experimentally infected by L. pneumophila standard strain and monthly monitored. Different materials were tested for a period of 180 days. The lowest L. pneumophila and heterotrophic plate counts were measured on plastic polymers, whereas L. pneumophila and heterotrophic bacteria were accumulated rapidly on galvanized steel surfaces. It can be concluded that selection of plastic polymers, as a manufacturing material, are suitable for recirculating water systems.     

通过频谱分析了解冷却塔噪声污染特性

目前,冷却塔噪声评价所采用的指标是A声级。而由于A声级并不能全面的反应冷却塔噪声污染的特性。本文通过对冷却塔噪声污染案例进行频谱监测,探讨了频谱分析方法对评价冷却塔噪声污染特性的可行性。