液化石油气储罐设置方式之初探

从能量释放的角度出发,以爆炸理论为基础,研究了液化石油气储罐不同设置方式下发生爆炸的影响范围,并根据储罐三种设置方式的特点,给出了液化石油气储罐的合理设置方案.     

细水煤矿特大瓦斯爆炸事故的处理与分析

本文介绍了朔州市平鲁区细水煤矿2005年3月19日特大瓦斯爆炸事故的发生、处理经过,通过对事故现场的调查和分析,找出了爆炸的原因,并进一步分析了相邻两矿井存在角联通风网络的弊端,为处理类似特大瓦斯事故提供了许多宝贵的经验,是一起科学抢险的典范.     

液化石油气爆炸范围及爆炸力的测定

液化石油气、瓦斯等可燃气体的爆炸防治是一个非常迫切需要解决的问题.利用自制可燃气体爆炸箱来模拟可燃气体爆炸,并通过光干涉甲烷测定仪来测定混合气体爆炸时的甲烷百分含量,再推算出液化石油气的爆炸范围和计算爆炸力.     

瓦斯爆炸事故的混沌特性及其控制方法初探

我国煤炭地下开采占全部产量的 96 % ,含瓦斯煤层多 ,高瓦斯矿井和突出矿井占矿井总数的4 4 % ,由瓦斯引发的爆炸事故的伤亡人数占全部矿井事故伤亡总数的 6 5 %。针对我国煤矿安全生产的严峻形势 ,笔者在对瓦斯爆炸事故特性进行分析的基础上 ,应用混沌理论对瓦斯爆炸事故的风险以及控制方法进行初步探讨 ,初步建立了瓦斯爆炸事故混沌特性分析模型 ,对预防和控制瓦斯爆炸事故的发生 ,改善矿井安全生产状况具有指导意义。     

PSA application for a PCB detoxification plant

 Polychlorinated biphenyls (PCBs), a type of persistent organic pollutants (POPs), are considered to be endocrine disrupters. According to the Stockholm Convention on POPs, PCB detoxification is being accelerated globally. We have developed an environmentally sound chemical PCB detoxification plant using the ultraviolet ray/catalyst method. The purpose of this paper is to check the design methodology for the PCB detoxification plant by the application of probabilistic safety analysis. First, possible hazardous events were determined; second, the weakest points in these hazardous events were established; and third, the impact when failures arise at the weak points in the system were studied. We clarified the preventive measures as follows. To prevent PCBs leaking into the environment, select leak-tight valves for the piping containing PCBs, and reduce the number of valves. To prevent fire or explosions due to leaks of an inflammable mixture, select leak-tight valves, reduce the number of valves installed in the piping, and improve the reliability of the suppression tank in the isopropyl alcohol (IPA) recovery unit. Received: February 27, 2001 / Accepted: June 17, 2002     

Closed wastewater cycle in a meat producing and processing industry

Creta Farm Plc, owns the largest meat producing (pigs rearing), processing and packaging unit in the island of Crete, in Greece, placed outside the city of Rethymnon in the north coast of the island. From the farm, where more than 20 000 pigs of various ages and sizes live, 300–320 m³ of wastewater are collected in a daily basis. From the slaughterhouse and the processing unit another 100–125 m³/d are produced. The wastewater treatment system is a combination of settling and aeration tanks, with decanters operating in different phases of the process, mainly for the removal of the solids from the wastewater. The average biochemical oxygen demand and total suspend solids values of the treated effluent are 40 and 80 mg/l, respectively. From this almost secondary treated effluent about 100 m³ are used for cleaning the sewage pipes of the rearing unit (animals houses). The remaining 300 m³ are disinfected with a weak chlorine solution before used for irrigating trees, grass and various other plants. More than 2000 eucalyptus trees, 1500 tamarix trees and a large number of olive trees are growing in the site creating a pleasant view and at the same time help minimising the odour problem.     

Gas explosion experiments in 1:33 and 1:5 scale offshore separator and compressor modules using stoichiometric homogeneous fuel/air clouds

An experimental investigation of flame and pressure development inside scaled-down versions of realistic offshore modules is reported. Two different scales, 1:33 and 1:5 and two different internal layouts, separator and compressor were tested. The effects of pressure build-up in homogeneous, stoichiometric In addition, the size and the distribution of the vent area of the modules were varied. The length, width and height of the 1:5 scale module were 8 m, The smallest pressures, 10–20 mbar were found for the cases with the largest vent area. Generally, pressures in 1:5 scale were 5–10 times larger th     

小康矿煤泥水治理方法的研究

本文针对煤泥水难以自然沉降的问题,研究了煤泥水的性质,提出了新的混凝荆ZL—1与PAM联用的治理方法。该方法简单,处理效果好,处理后上清水完全回用于洗煤,实现了洗水闭路循环。     

小龙潭电厂冲渣水系统零排放改造工程

详细介绍了小龙潭电厂冲渣水回收系统改造成闭路循环“零排放”的工艺及设计过程,分析了原系统不合理的原因和改造前后的经济比较,为火电厂废水处理与重复利用提供了设计与运行经验。     

矿山复垦土壤压实问题分析

分析了影响复垦土壤压实的主要因素，阐述了复垦土壤压实的可能后果，探讨了消除复垦工壤压实的有效途径和措施。