一种用于电力通信的自适应Adhoc协议

针对电网通信的智能化监测应用需要,提出了一种用于电力通信的Adhoc自适应预约按需传输多址接入协议,该协议在接入阶段可以根据业务量动态调整接入策略;在传输阶段可以无冲突的发送分组.针对该协议的吞吐量和平均时延性能进行了仿真分析.分析结果表明：协议能提高信道利用率、降低接入时延,可用于现代电力通信网络,以上研究结果对Adhoe在电力通信的工程中应用有较好参考意义.     

城沐一线500kV线路取消架空地线力学性能分析

架空地线的主要作用是防止雷电直击导线,但在冬季,由于架空地线线径较细,强度较低,多次因地线覆冰引发断线、跳闸事故,因此提出了取消重冰区500 k V线路架空地线的做法。使用有限元仿真工具ANSYS Workbench,以城沐一线500 k V线路三基杆塔为对象进行建模,对取消地线前后城沐一线的力学性能做了仿真计算。计算结果表明,在不同的覆冰强度下,取消地线后杆塔塔头及塔身主材所受拉力及应力都有所下降,提高了整个塔线体系在冬季运行的可靠性。结果可为冰区超高压电网的运行维护工作提供指导。     

周期性浸泡腐蚀试验标准及相关设备分析

基于产品运输、使用环境的复杂性,单一环境因素模拟已不能满足产品测试需求。溶液浸泡腐蚀试验是一种常见的环境试验,目前,其试验形式除单一的溶液浸泡外,周期性浸泡腐蚀试验也逐步开展。对此,GB、TB、ISO、PSA、ASTM等相关标准给出了规定要求和试验方法,在此基础上为满足其要求相应的试验装置也逐步开始开发和应用。基于不同标准和现有试验设备对周期性浸泡腐蚀试验进行分析讨论,得出各个标准的不同适用范围和试验条件,并针对其原理共性提出开发通用性设备的展望,为浸泡腐蚀试验标准的选取及试验装置的开发提供参考意见。     

处理日本遗弃在华化学武器专用透气防毒服的研究

本文针对日本遗弃在华化学武器的性质和特点,根据销毁工程对个人防护装备的需求．通过对目前国内外主要透气防毒材料的比较分析,提出了专用透气防毒服内外层纺织材料的技术性能指标和要求．为专用透气防毒服的研制做了前期技术准备。     

关于设备可靠性、保障性、维修性设计的几点体会

本文主要简述了某军用装备型号设备在可靠性、保障性、维修性设计中注意的几个重要方面,并对设计工作中具体的可靠性要求展开了讨论。     

Uptake of Cd, Cu, Ni and Zn by the Water Hyacinth, Eichhornia Crassipes (Mart.) Solms from Pulverised Fuel Ash (PFA) Leachates and Slurries

The main solid waste product from coal-fired power stations is pulverised fuel ash (PFA), which can be enriched in toxic elements. Disposal of PFA by dry (in landfills) or wet (by slurrying) disposal methods can release these elements into the environment. Thereafter, the contaminants can be taken up by biota such as Eichhornia crassipes, a common aquatic plant, which has the ability to accumulate elements from water. This study investigates the uptake of Cd, Cu, Ni and Zn by E. crassipes grown in leachates and slurries prepared from two different PFA samples. PFA samples were obtained from Indraprastha Power Station (IPP Stn.) in New Delhi, India and the Ratcliffe-on-Soar Power Station in the UK. E. crassipes grown in PFA leachates and slurries at 1:5 and 1:50 solid:liquid (PFA:deionised water) ratios show that the plant has a very high accumulation capacity for Cd, Cu, Ni and Zn from both leachates and slurries and the uptake of these metals is stronger in the roots than in the tops of the plant. Metal accumulation, as shown by the accumulation factor (AF) values, is higher from both leachates and slurries for plants grown in the 1:50 (PFA:DIW) ratios than in the 1:5 ratios, initial metal concentrations being higher in the 1:5 ratios than in the 1:50 ratios. Lower metal accumulation in the plants grown in slurries than in leachates is related to the high turbidity of growth medium in slurries resulting in ash particles adhering to the root surfaces thus reducing the surface area of metal absorption. Eichhornia plants are able to reduce the pH of all leachates, especially the highly alkaline Ratcliffe leachates to near neutral conditions. Accumulation of Cd and Zn by the plant is higher from the lower pH IPP leachates than the Ratcliffe leachates, indicating that these metals are more soluble and bioavailable in the acidic medium. However, accumulation of Cu and Ni is independent of the pH of the leachates, indicating that other factors, such as metal species, presence of complexing agents in the growth solutions, and effects of competing metal ions may be contributory factors towards the metal uptake and accumulation by the plant.     

浅谈堆肥设备

随着堆肥技术在不同固体废弃物处理中的广泛应用,与之相关的堆肥设备得到了极大的发展,堆肥设备包括物料处理、翻堆、反应器和除臭设备。家庭堆肥器和小容量反应器堆肥系统是堆肥设备新的发展趋势。     

天然气处理站节能减排措施研究与应用

新疆油田公司采油二厂81~#天然气处理站为解决天然气放空所造成的能源浪费及对大气环境的污染,对原工艺流程进行优化改造。文章介绍该处理站各套装置运行特点,分析了天然气放空的几种原因,并通过两个增压站停机检修期间流程改造、罐区天然气放空线改造、检修期间2套浅冷装置的流程优化等针对性措施,全年累计减少天然气放空3000×10~4Nm~3左右,增加经济效益约3000万元,同时减少H_2S排放约524 kg。     

电除尘器检修管理信息系统的开发

介绍了电除尘器的应用情况及运行维护中主要检修内容。将需要除尘的电厂作为使用对象开发一个电除尘器检修管理信息系统,主要任务有前端应用程序的开发和数据库的设计与数据的准确录入,选用Visual Basic 6.0和Microsoft Access 2003相结合开发一个可视化的管理系统。该系统能为使用电除尘器的电厂提供基本的检修管理服务,从而保证电除尘器的安全、稳定运行。     

关于提升我国环保装备技术水平的建议

从加强基础教育、提高产品标准及规范招投标市场等方面阐述了目前大多环保装备在技术含量上得不到升华的原因;介绍了一种拥有自主知识产权、节能、降耗、增效的新型倒伞曝气机;为节能、增效、减排、推动和优化发展我国环保装备产业提出了相关建议。