循环流化床锅炉脱硫的影响因素分析

较为系统的分析了影响循环流化床锅炉脱硫的各因素,其中包括运行床温、Ca与S物质的量、床料粒度、流化速度、以及SO_2在炉膛停留时间等,提出在不同运行条件下利用拟合曲线找出最佳脱硫工况。     

How clean is clean enough? Maintaining thermal protective clothing under field conditions in the oil and gas sector.

The purpose of this research was to develop practical care procedures to help maintain the protective quality of flame resistant workwear laundered by workers in the field. Based on observed field conditions, experiments were conducted that simulated domestic laundry procedures. The first experiment involved two flame resistant (FR) fabrics, contaminated or not contaminated with oil. Independent variables also included detergent type and laundry pre-treatment. Other laundry parameters were controlled. Results indicated that it is easier to maintain the FR performance of the FR-treated blend than it is for the aramid fabric. It is hypothesized that energy generated by initial ignition of oil on the specimens triggers the FR mechanism of the treatment, which in turn inhibits further combustion. A second experiment using larger specimens and a domestic washing machine also supported the hypothesized mechanism.     

CHARACTERIZATION OF INORGANIC PARTICLES IN SELECTED RESERVOIRS AND TRIBUTARIES OF THE NEW YORK CITY WATER SUPPLY1

ABSTRACT: Individual particle analysis (IPA) by scanning electron microscopy interfaced with automated image and X‐ray analyses was used to characterize inorganic particles in five reservoirs and four tributaries located within the Catskill and Delaware systems of the New York City water supply. Individual particle analysis provides combined elemental and morphologic characterizations. Results are presented in terms of particle projected area per unit volume (PAV), consistent with optical impacts, and partitioned into seven generic particle types according to composition. Minerals of terrigenous origins, particularly clay minerals, dominated the inorganic particle populations of all the study systems except one downstream reservoir. Higher PAV levels were observed in the Catskill system. Particle dynamics represented by PAV were driven primarily by runoff, while the reservoirs were also greatly influenced by the timing of sediment resuspension promoted by drawdown of the surface and fall mixing. The benefit of the serial configuration of the reservoirs in decreasing inorganic particles with progression downstream towards the city is demonstrated. The patterns in PAV levels among the study systems generally tracked those of more common metrics of impacts of suspensoids, including mass concentrations of suspended solids, turbidity, and Secchi disc transparency.     

陕西佛坪、宁陕"6.9"山地自然灾害考察研究

2002年6月9日,陕西南部佛坪、宁陕等地因特大暴雨引发了极其强烈的泥石流、山洪等山地自然灾害.本文考察研究了这次泥石流、山洪等山地自然灾害产生的条件,分布与活动特点以及未来发展变化的趋势.     

复杂矿井通风系统角联风路自动识别方法的研究

角联风路的识别与稳定性分析是矿井通风系统稳定性与可靠性分析理论中的核心内容之一。笔者对通风系统角联风路进行了深入的研究;分析了通路法的局限性,简化了角联风路的数学模型,提出了快速、准确、灵活的角联风路自动识别的新方法——节点位置法;编写了角联风路自动识别软件,并应用现场数据进行测试,将其结果与通路法的结果进行了比较分析;证明了节点位置法是切实可行的。     

地下商业街火灾烟气流动实验研究

烟气是火魔的杀手锏。在不同火源功率的长通道实体火灾实验基础上,研究地下商业街吊顶装修前后,以及不同的补风与排烟条件下烟气的特点,考察防排烟措施启动时机、启动位置以及排烟量的大小。实验结果表明:安装天花板有利于提高排烟速率,但烟气蔓延速度加快,因此宜采用镂空式天花板以利用顶部蓄烟;地下商业街宜采用远火源端补风、近端机械排烟方式,设计中需依据风量和速率选取风机,还应考虑风机对流场的扰动以及进风口设置位置。     

利用高温废气治理焦化酚氰污水项目实践

阐述了利用焦炉、窑炉、电厂等高温废气处理焦化污水的理论及工业实践,该工艺具有投资省、运行费用低的突出优点.     

水源热泵空调系统的水质处理技术

针对影响水源热泵系统运行效能的地下水水质和回灌过程中井堵塞的问题,提出相应的水质处理方法和水源热泵用地下水水质参考标准.     

水泥土搅拌桩的桩径分析

针对搅拌桩施工会引起周围土体的位移及产生很高的超静孔隙水压力的工程现象,首先分析了搅拌桩施工中固化剂的注入体积与膨胀压力、成桩直径的关系。结果表明,5%~10%的注入浆液的体积可以对周围土体产生1.8~3.0倍不排水抗剪强度的膨胀压力,成桩直径比搅拌叶片的名义直径大5%~10%。然后量测室内模型桩、现场搅拌桩的成桩直径,分析了注入浆液的体积与成桩直径的关系。结果表明,对于深度不太大的水泥土搅拌桩,有约45%的注入体积会通过上浮隆起的土体损失掉;大约5%的注入体积通过劈裂裂缝渗入到周围土体中;大约50%的注入体积会转化为成桩直径,使桩体膨胀5%~10%,即实测桩径比搅拌叶片的名义直径大5%~10%。     

运城湿地自然保护区管理现状及对策建议

针对运城湿地自然保护区的管理现状,分析了其存在的主要问题与产生原因,并结合自然保护区管理相关法律、法规、政策和制度,从多方面提出了加强和改进运城湿地自然保护区管理的若干对策与建议.