共查询到20条相似文献,搜索用时 578 毫秒
1.
2.
前些天在杂志上看到过一个故事,说的是中国人和犹太人的区别,一个犹太人建了一所加油站,生意很好,第二个犹太人来了,就在加油站旁边建了一座购物中心,生意同样很好,第三个犹太人来了,就在旁边又建了一座游乐场,生意照样很好,第四个犹太人来了,就开了一家4S店,生意也是好的不得了,第五个犹太人来了,他建的是公共卫生间,也赚到了钱。可是在我国呢,第一个人建了一个加油站,赚钱了,第二个人看到了,觉得有利可图,也建了一个加油站,结果第三个,第四个, 相似文献
3.
4.
带式过滤机在多品种氢氧化铝生产中的应用 总被引:1,自引:0,他引:1
介绍了带式真空过滤机的工作原理及其在多品种氢氧化铝生产方面的应用情况,并对带式真空过滤机使用过程中存在的问题进行了改造。改造之后,提高了洗涤过滤效率,降低了滤饼水分,降低了能耗,提高了产量,确保了产品质量,取得了较好的经济效益。 相似文献
5.
高庄煤矿供热系统的改造 总被引:1,自引:0,他引:1
高庄煤矿针对原锅炉供热系统存在的问题进行了改造,拆除原锅炉,采用邻矿电厂的富余蒸气作热源,安装热交换器组。改造后保证了供热质量,节约了能源、资源,提高了矿区环境质量,降低了运行维护费用,节省了人力资源,减少了占地面积,节约了各项检查检测费用。 相似文献
6.
<正>2010年1月16日—17日,公司召开了2010年度工作会议。会议认真回顾总结了2009年的主要工作,分析了当前的形势和机遇,部署了2010年的工作任务。会上,公司董事长蒋明作了重要讲话,总经理毛绍融作了行政工作报告,党委副书记陈百河作了党委工作报告,副总 相似文献
7.
8.
9.
10.
11.
12.
Prevaporation through the PVA membrame containing β-cyclodextrin oligomer (PVA/CD membrane) was performed for the mixtures of water/ethanol, water/1-propanol, and water/2-propanol. At higher alcohol concentrations, the water selectivities were greatly increased by CD for all the mixtures, in the order of 2-propanol/water>1-propanol/water>ethanol/water. The water permeation rate was decreased by CD, and the alcohol permeation rate was decreased much more for each mixture. At lower alcohol concentrations, the water selectivity for 1-propanol/water was slightly increased by CD, and that for 2-propanol/water was scarcely affeted, whereas that for ethanol/water was greatly increased. The water permeation rate was increased by CD for each mixture, and the relative increases in the water rates for propanols/water were smaller than that for ethanol/water. The permeation rate of 1-propanol as well as that of ethanol was decreased by CD, but the rate of 2-propanol was was increased. These effects of CD can be explained in terms of the inclusion strength. © 1994 John Wiley & Sons, Inc. 相似文献
13.
本文对塔河油田注入水进行水质全分析,评价研究了注入水与地层水的配伍性.实验表明:注入水中总铁含量高达32mg·L-1,与地层水混合后出现大量沉淀;通过水质处理研究,提出了“氧化除铁工艺技术”,解决塔河油田注入水与地层水不配伍技术难题. 相似文献
14.
选取大庆区域中10处湖泊(泡)的水样,通过主成分分析和聚类分析的方法对大庆区域内湖泊(泡)系统中的水质进行评价.研究表明,大庆地表水系统中的主要饮用水源的水质环境尚清洁,渔业用水水源的水质已受到轻度污染,城市生活废水与有机工业污水可能是造成水质污染的主要原因. 相似文献
15.
Study of drinking water treatment by ultrafiltration of surface water and its application to China 总被引:3,自引:0,他引:3
In China, many water supplies depend on conventional water treatment. Due to unfit soil and water conservationin some regions of China, conventional water treatment has showed some defects for the poor quality of water resource. In addition, advances in membrane technology and increasing requirements on water quality have stimulated ultrafiltration (UF) for water treatment. In this research, OF test apparatus was set up to produce drinking water from raw water of the Binxian Reservoir (China). The performance of UF membranes was investigated. There was a linear relationship between membrane resistance and accumulated permeate water. Using coagulation before OF increased permeate flux and retarded membrane flux decline. Surprisingly, membrane permeate flux in a coagulation/UF process was higher than that in coagulation-sand filtration-UF process with raw water of medium turbidity. OF treatment provided effective turbidity removal. Iron, manganese and aluminum were removed completely. The UF membrane also perfectly removed all coliform bacteria. The reduction of total organic carbon was satisfactory. The treated water quality complied with China's drinking water guidelines. The Ames test showed that the mutagenic activities of membrane permeate water was negative. 相似文献
16.
阐述了垃圾发电厂给水系统设计中根据用水设备对水质、水量不同的需求,做到水的三次利用,提高了水的重复利用率,并大大减少了生产废水的排放量,为该厂合理用水和节约用水打下良好的基础. 相似文献
17.
采用主成分分析法(PAc)对东张水库水质进行综合评价,分析了其水质的时间和空间变化特征及污染因子对水质的贡献,以揭示东张水库水质变化的时空分布规律和水质污染特征.分析评价结果表明:水质时间特征分析可由三个主成分反映。东张水库库心断面在2004-2009年时间跨度上表现为2005年水质污染综合评价排序最高。水质最好;20... 相似文献
18.
化工企业循环冷却水系统的节能技术探讨 总被引:1,自引:0,他引:1
在化工企业中,循环冷却水是一项常见且很重要的公用工程系统,但是它的能耗也非常高.据统计循环冷却水系统的用水量约占企业总用水量的85%~92%,用电负荷约占企业总用电量的20%~30%.故对化工企业中循环水系统进行节能优化,其效果对整个企业的节能影响甚大. 相似文献
19.
20.
依据SL 322—2013《建设项目水资源论证导则》,从水资源供用耗排综合分析的角度,重点分析了大唐国际怀来电厂取水对水资源可利用量、生态、水功能区纳污能力和其他用水户的影响;计算了电厂正常情况和非正常情况的退水总量,提出了退水处理方式,分析了退水对水功能区及第三者的影响。 相似文献