酒钢焦化厂焦炉地下室通风降温技术改造探讨

介绍了酒钢焦化厂焦炉地下室通风降温技术改造成果。通过参数确定、方案对比,采用了通风降温技术措施,效桌明显,改善了职工的作业环境,保护了工人的身体健康。     

基于安全心理学的主动式防火墙设计

当前防火墙的防御策略为被动防御 ,它只能被动等待攻击者的攻击 ,直接降低了其安全性能。从安全心理学的角度出发 ,分析了被动式防火墙的弱点并设计了一种新型防火墙。该防火墙采用主动式防御策略 ,对于在防火墙中识别出的非法访问 ,通过重定向 ,引导至识别区来保护主系统 ,降低攻击者的攻击欲望 ,从而提高了防火墙的安全性能。防火墙中关键技术为攻击识别技术和重定向技术。     

焦炉煤气净化工艺研究进展

阐述了国内外焦炉煤气净化工艺的发展与研究现状，介绍了几种典型的焦炉煤气净化工艺，重点说明了湿式氧化工艺中的FRC法和湿式吸收工艺中的Sulfiban法，比较了几种有代表性的焦炉煤气净化工艺的脱硫脱氰效果，工艺特点以及运转费用，同时介绍了美国研究开发的LO－CAT法和我国东北师范大学研究开发的PDS法，并提同了几点建议。     

模糊评价数学模型在企业安全评价中的应用

模糊评价是利用模糊数学的基本理论--隶属度将模糊信息定量化，再对其进行定量评价得出科学结论的一种方法。该方法运用较普遍。介绍了该方法的基本原理，通过实例论述了它在企业安全评价中的应用。     

Natural and pre-treatments induced variability in the chemical composition and morphology of lichens and mosses selected for active monitoring of airborne elements

To enhance the reliability of the moss and lichen transplant technique for active biomonitoring of trace metals in urban environments, we evaluated the natural variability in the chemical composition of the (epilithic and epiphytic) moss Hypnum cupressiforme and the epiphytic lichen Pseudevernia furfuracea from two reference areas in NE Italy. Green shoots of epilithic mosses and lobes of epiphytic lichens from larch branches showed rather homogenous composition and were selected for the exposure in nylon bags. As different physico-chemical pre-treatments are usually applied to selected cryptogamic material before its exposure, we also evaluated the effects of oven-drying at 120 degrees C for 24h, washing in 1N HNO3 solution, and in 0.5% NH4 oxalate solution at 85 degrees C for 15 h on the chemical composition and morphology of water-washed moss shoots and lichen lobes. Pre-treatments remarkably changed the chemical composition of selected materials but not their surface morphology.     

Alteration of brain electrical activity by electromagnetic field

To better understand the affect of different levels of EMF on one’s brain activity, the Hodgkin–Huxley model has been used to describe the generation of an active potential in the nerve cell membrane. The theoretical calculations have shown that by the simultaneous affect of both passing an electrical potential and external very low frequency AC, one’s excitation pulses may be suppressed beginning with a certain level of external current. The level of this current depends on the frequency. It is postulated that to eliminate this suppression, the brain increases its normal level relatively to the lower limit. It is also postulated that the brain “tunes up” in the presence of external AC, by increasing the amplitude of its own excitation signals so that suppression does not occur. It is possible that this “tuning” process lasts some time after removing the external EMF as the brain adapts. This has been observed experimentally.     

焦化废水中氨氮废水处理的应用与研究

焦化废水是一种氨氮和有机物浓度较高的难生化降解有机废水.综述了目前焦化废水处理方法中物化法、生化联合法和新型生物脱氮法的原理、应用以及研究进展情况,并指出了各种方法存在的问题.     

厌氧酸化在焦化废水脱氮和毒性削减中的作用

分别用厌氧酸化-缺氧-好氧(A₁-A₂-O)生物膜法和缺氧-好氧(A/O)生物膜法处理焦化废水,比较了二者对废水毒性的削减效果.试验结果表明,焦化废水的毒性大于0.19mg/L氯化汞的毒性.其毒性削减与有机氮去除有一定关系,厌氧酸化在提高废水有机氮去除率和降低废水的毒性方面起到了重要的作用.废水经A₁-A₂-O生物膜系统处理后,毒性大大降低,当HRT为37.9h时,出水对发光菌的相对发光度可达96.8%,其毒性相当于0.023mg/L氯化汞的毒性.     

生物过滤氧化反应器处理焦化废水

针对钢铁厂焦化车间采用普通活性污泥工艺处理焦化废水 ,出水水质经常超标 ,且对冲击负荷适应力差的情况 ,使用生物过滤氧化反应器 (BIOFOR)工艺对废水进一步进行处理 ,运行结果表明 ,BIOFOR表现出良好的抗冲击负荷能力 ,对CODCr、NH3 N、SS、油类、酚、氰化物等主要污染物的去除率都分别为 6 4 7%、79 8%、76 6 %、5 2 1%、95 4 %、6 1 4 % ,出水水质高于GB8978 1996第二类污染物二级排放标准。     

染料脱色菌的筛选及对活性艳红X-3B的脱色研究

从广州某印染厂生化处理池的活性污泥中筛选到三株对活性艳红X-3B具有高效脱色作用的真菌,其中菌株HMX-3的脱色能力最强。考察了培养时间、温度、培养方式、pH值以及染料浓度对HMX-3脱色能力的影响。结果表明,菌株HMX-3对150mg/L X-3B的24h脱色率达65.8%,经60h可使其完全脱色;HMX-3对活性艳红X-3B脱色的最适温度为25℃~35℃,最佳pH值为6~8,且振荡培养较静置培养条件下的脱色率高;随染料浓度的增加,脱色率降低,但对于400mg/L的X-3B在72h时的脱色率可达86.7%。