走向工作面贯通上山与支架快速回撤技术

针对走向工作面停采线与上山之间的护巷煤柱造成煤炭损失,支架回撤工艺复杂、巷道掘进量大等问题,提出走向工作面贯通上山与支架快速回撤技术。工作面贯通采区上山,利用上山回撤支架。在贯通前,利用压力拱模型分析剩余煤柱应力变化规律,并结合极限平衡区公式,确定让压煤柱为8 m;对贯通前基本顶合理断裂位置、让压调节机制、末采阶段采高进行了分析确定,并采取上山巷内补强支护及挂绳铺网措施。贯通上山后,首先利用支架对上山留巷,完成留巷后,利用上山回撤支架,先将上部端头3架逆时针旋转90°作为掩护架,在对剩余支架逐架回撤时,3个掩护架呈现台阶型。提出的技术取消了护巷煤柱及回撤通道,提高了煤炭采出率,减少了巷道掘进量,简化了回撤工艺。     

再燃法烟气脱硝技术

综述了再燃法烟气脱硝技术及其主要影响因素。通过对几种脱硝技术的分析比较，认为再燃脱硝是一种很有前景的脱硝技术，其投资和运行费用界于低NO。燃烧器和选择性催化还原技术之间，有喷氨条件下的先进再燃脱硝效率接近于选择性催化还原技术。总结了国内外对先进再燃脱硝技术各种参数影响条件的研究结果，并论述了该技术的应用要点。     

生物膜法A/O系统处理己内酰胺废水

采用缺氧-好氧淹没式生物膜系统处理己内酰胺废水,着重探讨了碳源对硝化、反硝化的影响.研究结果表明:缺氧池进水中可生物降解COD与NO x-N的质量比必须大于3,好氧池COD负荷应小于0.98kg/(m3.d),系统才能有效地同时脱氮和去除COD.     

Development and Adoption of a Simple Nonpoint Source Pollution Model for Port Phillip Bay,Australia

New computing tools and approaches allow tailored development of software to meet the needs of environmental managers. The processes required for such tailoring fit well with adaptive management concepts where, as knowledge and system understanding develop among managers, the software can be developed or replaced to match. This paper reports on development and adoption of a simple nonpoint source pollution modeling tool, including technical aspects of data support for modeling and social aspects of software design. The software, named FILTER, used a unit load model to generate expected pollutant loads from subcatchments of Port Phillip Bay, Australia. Monitoring data were used for calibration to modify the delivery of generated pollutants to receiving waters. Spatial, tabular, and charting software components were used to provide alternative forms of output visualization. FILTER was developed using a process that resulted in manager-stakeholders taking responsibility for setting of model parameter values and operation of the user interface, thereby encouraging uptake. The inclusive development process, tailoring of the software to manager needs and styles of usage, and matching of model complexity to data and knowledge, resulted in a successful application that has become the current agreed system representation among disparate stakeholder organizations.     

膜的改性及其在环境领域应用研究进展

膜改性由于具有清洁、廉价、节能等特点,近年来得到快速发展,是解决膜污染的有效方法之一。本文综合介绍了膜的基体改性、表面改性这两种改性类型和目前常用的改性方法包括表面涂覆、表面活性剂改性、化学修饰改性、仿生改性等等,并简单介绍了膜改性在环境领域的应用,探讨了膜改性今后的发展。     

夹点技术--一种有效的清洁生产方法

夹点技术作为一种有效的清洁生产措施可用于能源优化、资源节约、废物减量及污染防治等方面，能收到良好的经济效益和环境效益。本文介绍夹点技术的基本原理、应用研究领域及其发展趋势。     

Stand-alone wind power system with battery/supercapacitor hybrid energy storage

This paper presents a stand-alone wind power system with battery/supercapacitor hybrid energy storage. A stand-alone wind power system mainly consists of a wind turbine, a permanent magnet synchronous generator, hybrid energy storage devices based on a vanadium redox flow battery and a supercapacitor, an AC/DC converter, two bidirectional DC/DC converters, a DC/AC converter and a variable load. Several control strategies for the stand-alone wind power system are involved such as a maximum power point tracking (MPPT) control, a vanadium redox flow battery charge/discharge control and a supercapacitor charge/discharge control. The proposed MPPT control combines a sliding mode control with an extreme search control to capture maximum wind energy. This strategy avoids the necessity of measuring wind velocity, obtaining models or parameters of the wind turbine and calculating the differentials of the power generated from the wind power system and from the speed of the generator. The battery charge/discharge control maintains a constant DC bus voltage. When the battery charging/discharging current reaches the setting threshold, the charge/discharge control of the supercapacitor is triggered to limit the charging/discharging current of the battery. The simulation results show that the proposed method can rapidly respond to variations in wind velocity and load power.     

新型生物膜光纤传感器测定溴化物的研究

用新型生物膜作载体制成的光纤传感器对工业废水中的溴化物进行了测定,溴化物的线性范围为８×１０－７ｍｏｌ／Ｌ～２×１０－５ｍｏｌ／Ｌ;相对标准偏差为０８％;响应时间为２～３ｍｉｎ。     

长白山火山泥石流分布影响因子权重分析

利用层次分析法对长白山天池火山泥石流分布影响因子的权重进行了分析。将对长白山天池火山泥石流分布影响作为评价目标,将地质条件、地形地貌以及植被覆盖情况作为第一层次的评价因子,地层年代、地层岩性、风化程度、堆积厚度、高程、相对高差、纵坡比、植被类型、覆盖程度作为第二层次的评价因子,由评价目标以及2个层次的评价因子构成了层次结构模型。通过层次结构模型建立了2个层次的4个判断矩阵,通过对判断矩阵的计算,最终得到了各因子对长白山火山泥石流分布影响的权重值。其中地形地貌中的相对高差及纵坡比对长白山火山泥石流分布的影响最大。     

垃圾渗滤液中有机物分子量的分布及在MBR系统中的变化

利用凝胶层析方法分析了垃圾渗滤液中有机物分子量的分布情况,并考察了利用膜生物反应器(MBR)处理垃圾渗滤液系统中有机污染物分子量的分布以及水溶性腐殖质(AHS)含量的变化．研究发现,垃圾渗滤液中的有机物主要由两部分组成,即分子量大于6000的大分子物质和分子量小于1500的小分子物质．大分子物质主要是水溶性腐殖质,而小分子物质主要由挥发性有机酸及水溶性腐殖质组成．大分子的AHS难以被微生物降解,但能被微滤膜截留．大部分小分子的AHS既难以被微生物降解,又不能被膜截留,是构成MBR处理出水COD的主要成分．