新型环保节能烟囱的技术特征和运行原理

提出了一种新型烟囱技术,即利用旋涡流动的空气动力学特点,妥善地解决了湿法脱硫后烟囱内壁的腐蚀问题.同时,新型烟囱还具有更好的节能、环保效果.系统地论述了新型烟囱技术的基本内涵、主要技术优势、设计要点与运行原理,从空气动力学原理和工程实践两方面说明新型烟囱技术的合理性与实践可行性.     

对烟尘排放浓度测试问题的探讨

在锅炉烟尘排放浓度测试中，运行负荷和过量空气系数是影响测试精度的主要因素。交章对此影响及测定问题提出浅见。     

Dynamic Changes of Sandy Land in Northwest of Beijing, China

The area northwest of Beijing is one of the most important regions where many organizations invest and pay most attention. The environmental problems in this region affect not only Beijing but also the surrounding area. Based on observation of the characteristics of the change in sandy land, this study classified four types of dynamic change of sandy land, including extended sandy land, the reversely changed sandy land, the potential sandy land and no change in sandy land. Then the process and the trend of changes in sandy land and their environmental impact on the area northwest of Beijing were analyzed. The results show that the area of sandy land has increased in this region in the period of 1991 to 2002. Change between sandy land and grassland was the dominant change. It is found that the monitoring zones of Hunshandake sandy land and north of Yin Shan are regions with high ratio of extended sandy land, and are connected with widespread potential change of sandy land. This implies that these two regions have a high probability of increase in sandy land in the future. On the other hand, in the monitoring zone of Horqin sandy land and Ba Shang Plateau and its surrounding area, desertification had been controlled and the area of sandy land is expected to decrease. This indicates that the direction of the sandstorm to Beijing is expected to gradually move to the northwest. Furthermore, the decreases in sandy land and the reversing change from arable land to grassland and forests in the study region will affect the land quality and atmosphere. And the logistic multiple regression (LMR) model was employed to better understand the complexity and processes of increases in sandy land. This model predicts that there is a high probability of increases in sandy land in north of Siziwang Banner, Zhengxiangbai Banner and Zhenglan Banner. Finally, suggestions to the ecological construction of the study area have been proposed.     

纳米TiO2光电催化氧化法测定COD的影响因素

以纳米TiO2为光阳极，利用薄层微型反应器纳米TiO2光电催化氧化的方法测定COD，具有快速、准确、无二次污染的特点。研究了电解质类型、光源种类等对薄层微型反应器中光电催化测定COD的影响。研究结果表明：与NaNO，和KCl比较，NaH2PO4作电解质时的紫外光吸收低、电极表面氧化性能稳定，性能良好；与镓灯、碘镓灯比较，中压汞灯的紫外光谱丰富、辐射照度大，有利于TiO2光电催化反应的进行；通过热重分析，确定电极薄膜的烧结温度为520℃。     

铅锌矿业废弃地草本植物重金属耐性研究

本文调查了四川甘洛铅锌矿废弃矿区和尾矿库区自然生长的15种草本植物，分析了其体内重金属（Pb、Zn、Cd）的含量，并对植物的重金属耐受性作了初步探讨。研究表明，在所采集的15种草本植物中，地上部分以小飞蓬对Pb、Zn、Cd的富集量最高；地下部分富集量则表现出较大的种间差异性，野烟对Pb的积累量最高，假酸浆对Zn的积累量最高，水蓼对Cd的积累量最高，但均未达到“超积累植物”的标准。     

活性炭吸附法去除印染工业废水色度的试验与研究

通过试验初步研究活性炭直接吸附去除印染工业废水色度中吸附剂投加量、吸附时间等对色度去除率的影响。通过混凝沉淀法与活性炭吸附法结合、搅拌电解法与活性炭吸附法结合、脱色氧化法与活性炭吸附法结合等试验初步探讨了活性炭吸附与其它处理方法结合去除印染工业废水色度的可行性。同时，讨论了以上几种处理方法对水样中CODCr的去除、水样pH值变化等的影响。     

北京铁路局降雨量远程实时监测系统的研究与开发——系统结构及硬件

为北京铁路局各级防洪指挥部门在汛期能够实时掌握所辖铁路范围内的降雨量情况 ,实现主动防洪 ,并做好铁路抗洪抢险准备工作 ,确保汛期铁路行车安全 ,研究开发了北京铁路局“降雨量远程实时监测系统”。笔者介绍了系统的功能结构 ,重点分析了用于降雨量数据采集、传输的单片机雨量计、工业数据传输硬件设备技术 ,数据通讯协议以及网络通讯技术     

菠萝蜜的保鲜及其市场开发前景

介绍了菠萝蜜的基本生物特性,综合分析了食用价值,提出了对其进行速冻或凝胶保鲜的加工方法,这为消费者常年提供营养、美味的热带水果－菠萝蜜成为可能,同时也为加工企业提供了一条合理、有价值的开发途径。     

双温点立式炉烧结的PTCR元件环境适应性研究

本文研究了立式炉生产的程控交换机过电流保护用ＰＴＣＲ元件的几项关键的环境适应性参数,并与箱式炉烧结试样做了对比。结果表明和该设备烧结的ＰＴＣＲ元件,阻温特性重复性好、高温存放后阻值变化小、耐电流和雷击冲击性稳定,安全可靠、寿命长、有良好的环境适应性。