正压气力除灰系统的优化设计

从气力除灰系统的经济性考虑，按照系统运行能耗最省的原则，对系统进行优化设计。以山东临沂电厂除灰系统为例，优化出灰气比、管径、系统压损、耗气量等技术指标。实际运行效果证明这种优化设计方法是可行的，为该系统的推广应用提供了优化设计依据。     

Screening of environmental pressure from products in the Swedish railway infrastructure: Implications for strategic environmental management

This paper proposes a method to be used in environmental reviews as an initial tool for estimating upstream environmental pressures from material use in organisations dealing mostly with construction materials. Upstream environmental pressures are often omitted in environmental reviews from organisations and instead tend to be site specific, with a limited life-cycle perspective. This paper uses the Swedish National Rail Authority as a case to present the approach. An energy indicator is used to estimate the environmental pressure of material use.In the studied building project, a small set of products contribute to a major part of the material use and the material-related energy use. The energy use is almost exclusively of nonrenewable energy carriers. The three most important products are all homogenous and non-complex, which makes the energy indicator well suited for the analysis. The organisation can use the results to focus on the most important products and also to see which parts of the organisation contribute to the material-related energy use. Rail traffic in Sweden is almost exclusively from non-fossil-based energy carriers. This highlights the importance of the infrastructure to the overall environmental pressure of the railway. Consequently, if road transport were to shift away from fossil fuels, railways earlier environmental advantages would diminish, since research suggests that railway infrastructure is more energy intensive than road infrastructure.     

工业管道压力试验应注意的安全问题

按有关规定,我国压力管道分为长输管道、工业管道和公用管道,工业管道是指工业企业所属的用于运输工艺介质的工艺管道、公用工程管道和其他辅助管道,即工业企业内运行的压力管道均为工业管道.主要介绍了我国工业企业内工业管道相关运行维护管理与检验现状,重点强调工业管道运行中安全性能,及对工业安全性能确定所进行的压力试验的相关要求,为企业内部如何防止工业管道事故发生,实现安全生产提供有益的探索.     

制氧厂特种设备安全管理

根据多年的管理经验和现行特种设备安全法规,介绍了制氧厂特种设备安全管理的组织和职责,以及定期检验的内容.针对制氧厂典型的特种设备,介绍了特种设备的检验管理.     

Measuring the violence of dust explosions with the “20 l sphere” and with the standard “ISO 1 m vessel”: Systematic comparison and analysis of the discrepancies

On the basis of a systematic testwork with a number of different dusts, the explosion indices as determined within the 20 l sphere and with the ISO-VDI 1 m³ vessel have been compared. The repeatability has been assessed and since some systematic deviations appear a refined physical analysis of the explosion processes is developed. It appears in particular that the cube root law supposed to link both vessels is not verified. A striking illustration of this appears when a dust with a significant explosion severity inside the 20 l sphere is not even explosible in the larger vessel. It is strongly suggested that the ignition energy is forcing very significantly the explosion in the smaller vessel inducing several tens of Celsius degrees of preheating. It is shown also that the inner level of turbulence is decreasing very fast in the 20 l sphere during the flame development so that difficult-to-ignite mixtures would tend to burn at a lower combustion rate. It is further demonstrated that the major bias between the chambers can be explained and quantified with these elements. A correlation with the standard 1 m³ vessel and a grid of interpretation of the data is proposed.     

压力容器设计的一般要求及技术进展

不少压力容器都要在非常严峻的工况下工作,要保证其长期安全运行,就必须在设计、选材、制造、检验及使用管理上有一整套严格的要求.介绍了在设计石油、化工用压力容器过程中,需要满足的几方面要求,并对各方面要求进行了阐述,同时指出了压力容器设计技术的进展.     

安徽洪镇2M_1型多硅白云母的发现及其意义

1地质背景及采样安徽洪镇位于大别山一张八岭高压变质带南界约30km，车臣安庆25km，处于扬子板块前陆地带［v图1）。区内由南东往北西分布中无古界董岭群到中下三叠统青龙群，构造线方向呈北东一南西向。董岭群南侧分布有近精山圆形的洪镇混合花岗岩［’：。区内地层普通变质，但董岭群以上层位均保留有原岩部分特征及化石民本文所发现的ZM；型多硅白云母等分别来自变质砂岩（D。、S。，样号l、2），千枚岩（Z，样号4、5），白云母石英片岩（Pt。，样号6、7）以及大理岩（o；，样号3）中。2ZM；型多硅白云母的鉴定样品中多硅白云母通…     

室外风压、火风压对建筑物热压中和面位置的影响

首次提出风压与热压可完全分解 ,风压不改变热压本身的压力特性的观点 ,确定风压与热压共同作用下的新的中和面 ;提出火灾层火风压造成的空气渗进、烟气的排出过程属内部循环的观点 ;对于火灾烟气窜入建筑内部竖井通道的情况 ,则根据中和面上下各楼层总渗进、渗出平衡的观点 ,确定火灾引起的新的中和面位置。     

低压文丘里除尘器在选厂碎矿粉尘治理中的应用

低压文丘里除尘器具有除尘效率高、阻力小、能耗低、安装使用方便等特点 ,在我公司篦子沟矿选厂使用表明 :岗位粉尘浓度小于 2mg m3,外排粉尘浓度小于 6 4.32mg m3,除尘效率达 98.9%     

超声雾化性能的试验研究与回归分析

分析了煤矿井下呼吸性粉尘防治技术现状 ,重点介绍了水的超声雾化技术 ,并对其雾化性能进行了试验研究 ,最后应用回归分析建立了超声雾化性能的数学模型