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戴占洋 《中国石油和化工标准与质量》2014,(13)
控制液化石油气钢瓶的温度和充装量是保证钢瓶安全的重要因素。分析温度和充装量对液化石油气钢瓶安全性能的影响,增强人们对液化石油气钢瓶的认识,提高人们对液化石油气钢瓶安全常识的理论化水平,目的是减少日常生活中安全责任事故,保证人民的生命财产安全。以下本篇将就液化石油气钢瓶在使用过程中温度和充装量对其安全性能的影响做一下解析。 相似文献
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主要介绍任何减少DCS-120石油液化气钢瓶充装电子秤的使用过程中充装枪头释液化石油气,在液化气钢瓶充装过程中,每充装一瓶液化石油气,气瓶充装枪头处约释放0.007kg液化石油气至泵房,由于是充装切换无法回收,导致这部分液化石油气只能通过风机强行排放至大气,释液的液化石油气对操作人员和对环境的造成危害。 相似文献
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液化石油气钢瓶静强度的确定 总被引:4,自引:1,他引:3
分析了液化石油气钢瓶的静强度,得到如下结论:①液化石油气钢瓶的临界长度为Lcr=0.216(k 1)^3Di;⑦短液化石油气钢瓶的静强度可用公式P=1.2(k-1)σ/^3√L/Di计算。经有关试验数据验证,本文方法可用于工程计算。 相似文献
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介绍了水泥回转窑和焚烧炉联合处理城市生活垃圾系统中垃圾在焚烧炉内进行非均相燃烧的情况,对利用熟料冷却机的热风作为燃烧空气的焚烧炉内垃圾烘干状态及燃烧状态进行了热平衡分析。结果表明,热风温度为600℃时,烘干热平衡温度为231.5℃,焚烧系统不必配备点火装置,燃烧热平衡温度为999℃,满足垃圾无害化处理的温度要求;采用高的空气过剩系数有利于点火,适当降低空气过剩系数有利于提高垃圾燃烧温度。根据水泥熟料煅烧的合理空气用量,分析分解炉用燃烧空气是否全部通过焚烧炉取决于热空气温度的高低,为工程设置分解炉专用燃烧空气管道提供依据。 相似文献
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Dinesh Singh J. K. Gehlawat Musti S. Rao 《Journal of chemical technology and biotechnology (Oxford, Oxfordshire : 1986)》1990,47(2):127-136
Oslefins and diolefins are important intermediates in the petrochemical industry and the future promises a further substantial increase in demand. While several catalysts have been formulated in the past for the abstraction of hydrogen from butenes and propylene, these catalysts are inefficient in the abstraction of first hydrogen from butane. Bismuth molybdates (β and γ-phases) containing iron oxide and supported on alumina are used as catalysts in the present investigation on the oxidative dehydrogenation of n-butane. Effects of catalyst content, temperature and oxygen: n-butane ratio on conversion and selectivity to butadiene and (C4H8 + C4H6) are studied in the following ranges of experimental conditions: β-bismuth molybdate/100 mol support I(K), 3–9; γ-bismuth molybdate/100 mol support I(K), 5-20; temperature, 400–500°C; O2: butane ratio, 0.6:1.7. 相似文献
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考登钢作为一种高耐候结构钢,广泛应用于各个领域。在火力发电方面,考登钢主要应用在工作环境比较恶劣的烟气加热器和空气预热器中。考登钢表面涂搪的目的就是进一步提高其耐腐蚀性能,延长使用寿命。为了提高考登钢元件的使用寿命,对考登钢表面涂搪瓷的可行性、密着性能、瓷釉、工艺控制、质量保证等方面进行了研究。 相似文献
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A viscometer used to measure the viscosity of 10 μl of a liquid, must be miniaturized down, and the liquid velocity gradient in the channel used to determine the viscosity coefficient. Two major factors that affect the liquid velocity are the mechanical forces exerted by the mechanical motors and electromagnetic forces. In this study, electrowetting on dielectric (EWOD) is adopted to drive liquids. Variously sized electrodes on a chip, and two shapes of channel are employed to measure the velocity gradient to determine the viscosity coefficient. The device is fabricated by microelectromechanical system (MEMS) technology. The dielectric layer used in EWOD has a high dielectric constant, BST (Ba0.7Sr0.3TiO3), to reduce the required applied voltage; its surface is coated with hydrophobic polymer, polytetrafluoro-ethylene (PTFE, Teflon® AF DuPont). Experimental results demonstrate that liquids can be pulled at 660 μm/s in linear channels by applying a voltage of 15 V. 相似文献
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In reexamining medium effects on photochemical reactions, we have emphasized those on unequilibrated excited species such as the Franck-Condon species. Despite recent advances in femtochemistry, such a discussion in molecular photochemistry is uncommon, and the problem remains challenging on account of the extremely short-lived excited species. However, in such cases, a small perturbation resulting from, for example, weak guest-host interactions could turn into a determining factor in dictating the course of a photochemical channel of deactivation. Examples of medium-directed diabatic processes have been examined with this idea in mind. A modified view on rhodopsin photoisomerization is presented along with the consideration that confinement does not necessarily lead to inhibition of reactions of the trapped substrate. 相似文献
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研究了温度和pH值对漆酶酶活以及漆酶处理纤维压制纤维板性能的影响。结果表明,pH较低、温度较高时漆酶酶活较高,压制的纤维板强度性能较好。但温度太高(60~80℃),延长加热时间,漆酶稳定性变差,酶活明显降低,压制纤维板的强度下降。 相似文献
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采用实验方法考察工艺参数对沉降斑的影响。基于一个带凸台的平板模具,采用L27(313)正交矩阵进行实验,研究了几何尺寸、熔体温度、注射时间、保压压力及保压时间对厚度突变处沉降斑形成的影响,同时还考虑了熔体温度和注射时间以及保压压力和注射时间之间的交互作用影响;通过性噪比分析和F检验优化成型工艺条件并对工艺参数的影响进行显著性分析。结果表明,对于厚度突变的平板制品,厚度突变的程度对其沉降斑形成的影响最大,其次为熔体温度,保压压力,保压时间等;采取减小厚度变化,降低熔体温度或增加保压压力和保压时间等措施,可以减小厚度突变处沉降斑,从而减少其对外观质量的影响;因素之间的交互作用对制品沉降斑的形成有一定的影响,熔体温度B和注射时间C之间的交互作用影响较为明显,而保压压力D和注射时间C之间的交互作用对该质量指标的影响最小,可以并入误差。 相似文献