论云南水泥立窑除尘技术

根据我省水小泥立窑的特点，提出了拟定立窑除尘技术时要考虑的几个问题，阐述了几种常用的立窑除尘技术和设备，并通过比较选择，推荐了在不同的环境状况下值得推广的除尘技术。     

燃煤锅炉脱硫技术现状及应用SXC型除尘器的若干问题

综述了中国中小型燃煤锅炉脱硫技术现状，指出了适应中国国情的脱硫技术特点，结合工程实例分析了SXC型脱硫除尘器的除尘、脱硫机理、并对它的运行，管理提出了一些建议。     

关于水泥立窑烟气除尘问题的探讨

本文分析了水泥立窑烟气的特性和我国现有各种除尘设备存在的问题，提出应大力开展水除尘方法的研究。介绍了常用两种水除尘器除尘效率的理论计算公式，可作为研究，设计时的参考。     

水膜除尘器改造与脱硫技术

水膜除尘器是一种传统的除尘方式，本文通过对水膜除尘器改造方法的介绍，向人们展示了一种全新的除尘脱硫技术，即将气－液－固流化床技术应用于烟气净化，将脱硫，消烟、除尘过程集为一体（流化床），一并完成。     

孤立纤维除尘效率与包壳纤维除尘效率的关系

孤立纤维除尘效率与包壳纤维除尘效率是分析纤维过滤式除尘器除尘机理的基础。本文首先定性分析了这两个概念。然后，从理论上找出了二者之间的关系式，研究结果表明：孤立纤维的除尘效率高于包壳纤维的除尘效率。     

BCX—100型自动板式除尘系统的研究

本文介绍了ＢＣＸ－１００型自动权式除尘系统的结构和工作原理；重点研究了该系统和设备设计上的主要特点及使用效果；并与其它除尘设备进行了综合对比分析，实践证明该系统是目前纺织厂较为理想的除尘设备。     

浅谈湿式脱硫除尘器的运行维修及选型

介绍了湿式脱硫除尘器的运行过程，阐述了脱硫除尘器的维修技术，提出了脱硫除尘器选型时应注意的问题，指出使用脱硫除尘器具有良好的环保效益。     

管式高压静电除尘器的结构与工艺概要

管式高压静电除尘器的除尘效率一般在９９％以上，近期在国内电子玻璃行业应用效果良好。本文就其工作原理、结构特点和操作、工艺要点作了介绍。     

镁粉尘除尘设计的特性研究

镁粉尘是一种易爆炸的有害物质，选择哪种类型除尘器将其排除，是本文要讨论中中心。本文根据原有某生产车间的除尘设计改造，对如何排除镁粉尘进行探讨，认为采用袋式除尘器和较高的通风量进行除尘效果更好。     

多管旋风—布袋复合除尘器的研究

本课题的思路是将多管旋风和布袋除尘器两者的优点集合于一体，提高设备的除尘效率，降低排放浓度，减少阻力，增强可靠性，延长使用寿命，节省占地面积。     

钢铁企业矿焦槽除尘超低排放改造方案分析

探讨了布袋除尘器超低排放改造的主要措施,并基于钢铁企业的矿焦槽除尘超低排放改造工程,介绍了四种改造方案:串联除尘箱体、并联除尘器、加高除尘器、改变滤袋形状。分析了各种改造方案的利弊,推荐在扩容比例较高时优先选择改用褶皱滤袋的方案,并简要阐述了超低排放改造的效益。     

活性炭的选型及炭滤池的运行维护

重点介绍了桐乡市自来水公司果园桥水厂活性炭滤池的炭选型、填充及运行维护情况。通过对不同活性炭滤池的运行情况进行跟踪分析,摸索出了活性炭滤池的运行维护管理经验,可为类似工程的设计和运行管理提供借鉴。     

空气滤清器滤纸的选用和保养

工程机械发动机所选用的空气滤清器滤纸,要求滤清效率高、透气度要适中、积尘后背压损失上升要缓慢,寿命要长、运行费用要低。为此,本文对滤清器用滤纸的选用和保养做以介绍。     

Digital filter adaptation for tubing response correction at reduced sampling frequencies

The use of a connecting tube to link a pressure tap to a pressure sensor in experiments can have an adverse effect on the accuracy of the measurements. Digital filtering of the measured signals using experimentally determined compensation filters can significantly increase the accuracy of the measurements while avoiding the need for post-processing of data in the frequency domain. This paper examines the nature of the required filters, and presents a method of adapting those filters to suit reduced sampling rates. It is shown that the ideal filter is dominated by non-causal terms, but that the causal terms can be important in some circumstances. A filter, based on experimental data sampled at a high sampling rate, is adapted to suit reduced sampling rates, and the effectiveness of the adapted filters is demonstrated with experimental data. It is shown that the application of the adapted filters substantially reduces the errors introduced by the presence of the connecting tube.     

Pollutant removal from municipal sewage lagoon effluents with a free-surface wetland

This research project was initiated to refine the knowledge available on the treatment of rural municipal wastewater by constructed wetlands. To determine the treatment capacity of a constructed wetland system receiving municipal lagoon effluents, the wetland was monitored over one treatment season, from May 19 to November 3, 2000. The wetland system consisted of a three-cell free-surface wetland, phosphorus adsorption slag filters and a vegetated filter strip. Bimonthly water samples at the inlet and outlet of each component of the wetland system were analysed for biochemical oxygen demand, nitrate and nitrite, ammonia and ammonium, total Kjeldahl nitrogen (TKN), total suspended solids (TSS), total phosphorus (TP), ortho-phosphate (ortho-PO(4)), fecal coliforms (FCs) and Escherichia coli. The free-surface wetland cells treating the lagoon effluents achieved removals as follows: biochemical oxygen demand (34%), ammonia and ammonium (52%), TKN (37%), TSS (93%), TP (90%), ortho-PO(4) (82%), FCs (52%) and E. coli (58%). The wetland cells reduced total nitrogen, TP and biochemical oxygen demand to levels below the maximum permissible levels required for direct discharge to nearby receiving waters (TN<3.0 mg x L(-1), TP<0.3 mg x L(-1), BOD(5)<3.0 mg x L(-1)). The vegetated filter strip treating the effluents from the wetland cells achieved removals as follows: biochemical oxygen demand (18%), ammonia and ammonium (28%), TKN (11%), TSS (22%), TP (5%), FCs (28%) and E. coli (22%). It may therefore serve as an additional treatment stage further reducing the concentrations of these mentioned parameters. The slag filters reduced TP in the lagoon effluents by up to 99%, and, in this study, were concluded to be effective phosphorus adsorbers.     

有源滤波技术及工程应用

随着用电系统中非线性负载和冲击性负载的广泛应用,电网中的谐波问题日益严重。文章简单的阐述了有源滤波器的发展现状、特点、选型及其应用案例,并对有源滤波技术在我国的发展前景作了一定的描述。     

Mass balance and isotope effects during nitrogen transport through septic tank systems with packed-bed (sand) filters

Septic tank systems are an important source of NO3(-) to many aquifers, yet characterization of N mass balance and isotope systematics following septic tank effluent discharge into unsaturated sediments has received limited attention. In this study, samples of septic tank effluent before and after transport through single-pass packed-bed filters (sand filters) were evaluated to elucidate mass balance and isotope effects associated with septic tank effluent discharge to unsaturated sediments. Chemical and isotopic data from five newly installed pairs and ten established pairs of septic tanks and packed-bed filters serving single homes in Oregon indicate that aqueous solute concentrations are affected by variations in recharge (precipitation, evapotranspiration), NH4+ sorption (primarily in immature systems), nitrification, and gaseous N loss via NH3 volatilization and(or) N2 or N2O release during nitrification/denitrification. Substantial NH4+ sorption capacity was also observed in laboratory columns with synthetic effluent. Septic tank effluent delta15N-NH4+ values were almost constant and averaged +4.9 per thousand+/-0.4 per thousand (1 sigma). In contrast, delta15N values of NO3(-) leaving mature packed-bed filters were variable (+0.8 to +14.4 per thousand) and averaged +7.2 per thousand+/-2.6 per thousand. Net N loss in the two networks of packed-bed filters was indicated by average 10-30% decreases in Cl(-)-normalized N concentrations and 2-3 per thousand increases in delta15N, consistent with fractionation accompanying gaseous N losses and corroborating established links between septic tank effluent and NO3(-) in a local, shallow aquifer. Values of delta18O-NO3(-) leaving mature packed-bed filters ranged from -10.2 to -2.3 per thousand (mean -6.4 per thousand+/-1.8 per thousand), and were intermediate between a 2/3 H2O-O+1/3 O2-O conceptualization and a 100% H2O-O conceptualization of delta18O-NO3(-) generation during nitrification.     

气溶胶粒径计数法检测空气过滤器效率的探讨

介绍了国内现行空气过滤器效率的标准检测方法——大气尘计数法,指出了该效率检测方法的优缺点。详细介绍了当前欧、美等国家空气过滤器效率的标准检测方法—气溶胶粒径计数法,并从试验用气溶胶、检测仪器和效率标识三个方面对欧、美的效率检测方法进行了详细的分析比较。列出了气溶胶粒径计数法较大气尘计数法的优越性,进而提出了用气溶胶粒径计数法来检测空气过滤器效率的观点。并详细说明了用气溶胶粒径计数法检测空气过滤器效率的操作方法。     

有源电力滤波器的谐波滤除效果分析

介绍杭州市某枢纽综合楼工程中产生谐波的主要设备,用ABB谐波计算软件Harmonic Analysis from ABB JUMET进行谐波计算,列出1#～4#变压器的各次谐波计算结果。设计选用ABBPQFA-A和PQFA-B型有源滤波器各2台,通过测试滤波前后的相电流和三相电流电压波形,并进行比较分析,得出结论:滤波器的滤波效率明显,超过95%。     

Comparative pilot-scale investigation into uprating the performance of percolating filters by partial medium replacement

A pilot-scale investigation was carried out to ascertain whether the loading to conventional single-pass percolating filters could be increased by partially replacing mineral medium with a random plastic medium. The treatment efficiency of a mixed-media filter (1.2m³ blast furnace slag topped by 0.8 m³ Flocor RC plastic medium) was compared over 26 months with the treatment efficiencies of two single-medium filters containing 2 m³ blast furnace slag and 2 m³ Flocor RC respectively. Two hydraulic loadings, 1.68 and 3.37 m³ m⁻³ d⁻¹, average organic loadings 0.28 and 0.63 kg BOD m⁻³ d⁻¹, were used for consecutive periods of 13 months. Medium replacement has been shown to be a viable system for uprating conventional filters. The mixed filter was more versatile and was also markedly more efficient than the slag filter at the higher hydraulic loading. It is estimated that at this loading the mixed filter could treat a 30% greater organic load than the slag filter.