自动反洗表面过滤器在冶炼烟气制酸净化工序中的应用

介绍了自动反洗表面过滤器的组成、技术特点、工作原理、工艺流程及主要的技术性能指标。自动反洗表面过滤器在冶炼烟气制酸系统净化工序中应用后,取得了较好的效果。     

陆上特大型沉井施工技术

泰州大桥主桥采用主跨2×1080m三塔两跨两锚碇悬索桥,其中南、北锚碇基础为特大型沉井,矩形平面尺寸为67.9m×52.0m,高度分别为41m,57m。针对锚碇基础覆盖层深厚、基础尺寸巨大、沉井下沉深度深等特点,通过施工技术的攻关,顺利完成了砂桩复合地基处理、沉井制作和拼装、钢壳沉井混凝土填充、混凝土沉井接高施工、水力机械冲吸式排水下沉和空气吸泥机吸泥下沉等多项施工工序,为今后陆上特大型沉井施工提供了借鉴。文章简要介绍了南、北锚碇陆上特大型沉井的施工技术。     

钻井岩粉在钻井液中自由沉降的实验研究─—岩粉的沉降阻力系数及沉降速度

利用模拟岩屑分别在淡水、ＣＭＣ钻井液以及用于德国大陆超深井的ＫＴＢ钻井液中进行了沉降实验并测定了岩屑的沉降速度。观测到两种不同的沉降方式─—稳定沉降、摇摆沉降。岩屑的沉降方式与岩屑的雷诺数有关。当岩屑的雷诺数小于１００时，岩屑稳定下沉；反之，雷诺数大于１００时，岩屑摇摆下沉。通过实验测定的数据建立了新的岩屑沉降阻力系数及沉降速度的计算模型。     

Toward sustainable development: Lessons from vernacular settlements of SriLanka

From modern urban perspectives, indigenous housing practices are regarded as undeveloped, backward, and require improvements. They may be valid for measuring on the basis of standards alien to the communities. However, these perceptions have obfuscated the appreciation and potential adoption of holistic, culturally relevant, and traditionally tested approaches to planning and housing that have sustained communities for centuries. Sri Lankan indigenous settlements have been founded on principles and understanding acquired through the wisdom of Buddhism. For the Sri Lankan indigenous, sustainability has been an intrinsic accompaniment to everyday life, unlike articulated modern discourses. However, these traditions exert minimal benefits to recent housing practices, and researchers are looking elsewhere to develop mechanisms to infuse sustainability as a recently discovered issue of significance. The present study examines the principles underlying several indigenous settlements in Sri Lanka through close observations supported by documente devidence and demonstrates their validity and appropriateness for contemporary planning practices. This study argues that approaches to sustainability should be generated holistically from within rather than from the outside and offers several propositions that can redirect the contemporary housing and planning practices.