环保组合工艺处理碱渣废水的工业应用

介绍了以“缓和湿式氧化”与“间歇式生物氧化”组合工艺处理炼油厂碱渣废水的原理、工业流程、操作参数及其应用效果。并且对影响氧化效果的反应温度、压力、空气比、回流量及其碱渣杂质等主要因素进行了讨论。     

大坝变形监测应注意的几个问题

对大坝变形监测中存在的环境潮湿、设备受各种外界条件干扰、折光影响、测点变形、蓄水期前很少测得大坝监测的基准值等问题进行分析,并根据实践提出一些看法。     

Suspended sediment concentration in relation to forestry operations in Catamaran Brook and its tributaries (Canada)

The Catamaran Brook Habitat Research Project is a 15‐year investigation of river processes and potential impacts of forestry activities on Atlantic salmon (Salmo salar) and its freshwater lotic habitats. Suspended sediments have been sampled in Catamaran Brook and its tributaries from 1990 to 1997. Data on total event precipitation and hourly peak discharge were related to suspended sediment concentration (SSC) under different catchment conditions (dry vs. wet) and treatment (absence or occurrence of timber harvesting). Although SSC generally showed a good correlation to total event precipitation and hourly peak discharge, there was no clear evidence that forestry operations were an important factor within the main Catamaran Brook during the timber harvesting year and the year that followed. Such was not the case for SSC in small tributaries draining directly from cut blocks during logging. In fact, the highest concentrations of suspended sediment were measured in small tributaries draining cut blocks during timber harvesting (with a maximum SSC of 404 mg L⁻¹ in Tributary 1). Within the main Catamaran Brook, a dilution effect rapidly decreased these values downstream of affected tributaries. Processes related to the transfer of sediment to the streams are discussed. Potential improvements in river management and operational timing with respect to the timing of harvesting activities as it relates to precipitation, discharge, catchment conditions (dry vs. wet), freezing/thawing, and salmon migration are also discussed. Copyright © 2006 John Wiley & Sons, Ltd.     

硫铁矿烧渣湿法制备铁红的简易工艺研究

在对硫铁矿烧渣全铁含量以及组分研究的基础上,运用湿法工艺以硫铁矿烧渣为原料制备铁红,省去专用还原剂还原的步骤,研究了高温硫酸还原的最佳条件,试验确定制备铁红的简易工艺,节省了试剂与能源。采取该工艺制取的铁红纯度为92%～94%。     

上市公司经营绩效实证研究——基于酒类上市公司的数据

本文基于现行上市公司的绩效评价指标体系,建立了上市公司绩效评价的因子分析模型,采用主成分分析法,对我国证券市场酒类上市公司2005年度经营绩效进行了实证分析和综合评价,得出了上市公司绩效的综合得分和排名,并对结果进行了综合分析,以期为企业经营管理者及投资者决策提供有价值的信息,也为上市公司提高经营绩效提供借鉴。     

锅炉引风机替代增压风机投运脱硫装置运行技术研究

脱硫装置的投运率不低于90%,是当前我国环保法规对火电企业脱硫装置运行的基本要求,而脱硫增压风机故障检修常使火电企业因环保问题面临主机被迫停运和增发电量的两难选择,本文通过介绍脱硫增压风机故障检修情况下,用锅炉引风机成功代替增压风机,使脱硫装置投入运行的技术创新实例,为企业解决增压风机故障问题提供了较好的思路;也可作为火电机组雨季低负荷运行时,停运增压风机,节能降耗的运行优化方案。     

JFDI-3048弛张筛干法筛分在选煤厂的应用

为解决晋煤集团寺河矿选煤厂湿法筛分出现的综合性能差的问题,对洗煤工艺进行分析研究,决定采取干法筛分来解决。实践表明,改造后使用JFDI-3048弛张筛进行干法筛分其综合性能明显提高,经济效益显著。     

先简支后连续桥梁湿接缝的施工技术研究

论述先简支后连续梁的受力特点，详细介绍了湿接缝的施工过程、施工工艺和施工技术指标控制，以期为同类工程施工提供参考。     

铁路隧道断层破碎地段TK600湿喷机喷聚酯纤维混凝土施工工法

结合新建厦深铁路(福建段)客运专线大回山隧道工程实践,介绍了现场施工过程中采用了国内先进的TK600湿喷聚酯纤维混凝土工艺进行断层破碎围岩进行加固处理,供今后类似工程参考。     

关于500kV升压站支柱绝缘子污闪防治的探讨

文章分析了中电广西防城港电力有限公司500 kV升压站支柱绝缘子在春季雾霾天出现雾闪,严重影响机组稳定运行及系统安全问题,结合对其运行维护2年多的实践,总结了一定的经验,供同行参考。