液化气钢瓶车载GPS移动配售系统

根据"十二五"上海燃气转型发展新形势,液化石油气用户将呈现分布范围广、不均匀、流动性大的特点,通过国内外液化气行业移动配送系统应用现状与趋势分析,结合上海实际,上海液化石油气经营有限公司开发了基于上海燃气服务平台,利用GPS设备运用于液化气钢瓶车辆配送、销售的集成系统并成功运用,以期对推动行业更及时、准确地实现瓶装液化气全配送服务。     

液化石油气中硫化物浓度的表征及单位换算

从硫化物的种类、浓度测定采用的分析方法、硫化物分析结果的表征3个方面详细论述了现有液化石油气中硫化物浓度的表征方式;探讨了液化石油气中硫化物浓度表征参数换算的意义;液化石油气中硫化物的换算方法从计量基准的换算和计量单位的换算两个方面作了重点讨论。最终,建立了液化石油气中硫化物换算公式,形成了计算公式汇总表;针对液化石油气中的常见硫化物,形成了简洁易查的换算系数汇总表。     

H2S在LPG与MDEA水溶液中的溶解度测定

介绍了一种H2S在醇胺水溶液与LPG中分布的测定方法，此方法可分析H2S摩尔分数低至0．0002％的含量(H2S摩尔分数范围0．0002％～5％，MDEA的摩尔浓度为3．0mol／L和4．2mol／L)。实验数据表明在LPG中H2S的摩尔分数低于1％时，其摩尔分数的对数与胺相中H2S负荷的对数近似呈线性关系。因此，可将H2S摩尔分数适当外推到0．0001％，来满足生产和设计的需要。     

建立空气净化工程 加快燃气汽车加气站的发展

阐述了建立空气净化工程、推动燃气汽车发展的重要性,介绍了国内外燃气汽车的发展状况,分析了当前我国液化石油气和天然气供需状况,以及车用液化石油气、天然气的发展趋势,指出了当前发展中存在的一些问题,并阐明了中国石油化工集团公司为加快燃气汽车与加气站的发展而制定的方针措施。     

基于掺铒光纤的长周期光纤光栅滤波器的研究

研究了基于掺铒光纤的长周期光纤光栅的纤芯基模、包层模式的有效折射率随波长的变化关系,及两者之间耦合后的透射谱线.结果表明,直接在掺铒光纤上制作长周期光纤光栅与其他光纤相比同样可以达到滤波效果,并且同种类型光纤之间的熔接耦合损耗要小于不同种光纤之间的熔接耦合损耗.     

Flame structure of LPG-air Inverse Diffusion Flame in a backstep burner

The present experimental study characterizes the turbulent LPG Inverse Diffusion Flame (IDF) stabilized in a backstep burner in terms of visible flame length, dual flame structure, centerline temperature distribution, and oxygen concentration. The visible flame length for a fixed fuel jet velocity is found to reduce with increase in air jet velocity. Besides this, the effect of air and fuel jet velocities on visible flame length is interpreted using a new parameter, Global Momentum Ratio (GMR). Interestingly, GMR seems to be correlating well with the visible flame length for the air and fuel velocity ranges considered in the present study. Moreover, the dual flame structure of IDF is identified with the help of CH-chemiluminescence signature. The existence of dual flame structure of IDF is confirmed further with the centerline temperature and oxygen concentration measurements.     

Effects of nozzle length on flame and emission behaviors of multi-fuel-jet inverse diffusion flame burner

An experimental study was performed to investigate the effects of the nozzle length on the air-pollutant-emission and noise-radiation behaviors of a burner utilizing a multi-fuel-jet inverse diffusion flame (MIDF). Comparison of the experimental results obtained from two MIDF burners, one with a long nozzle and the other with a short nozzle, operating under the same air/fuel supply conditions (Re_air and Ф) shows rather significant differences in the flame appearance, flame centerline temperature, CO/CO₂ concentrations and the noise radiation. The nozzle length influences development of the jets and hence interaction between the air/fuel jets including their mixing process. The short nozzle produces a flame with a shorter base height and a smaller potential core due to the enhanced air/fuel mixing. It also leads to faster and more complete combustion at the inner reaction cone of the flame due to the stronger and faster air/fuel mixing. The nozzle length affects the CO and CO₂ concentrations, and higher peak values are obtained with the short-nozzle flame. Flame noise of the MIDF is defined as the noise radiation at different flame heights, which is of varying strength but of the same dominant frequency in the range of 250–700 Hz. The noise radiation from the inner reaction cone of the flame is stronger than that from the lower and upper parts of the flame, and the maximum noise radiation occurs when the total amounts of air and fuel in the combustion zone are at the stoichiometric air/fuel ratio. For all the experiments conducted in the present study, the MIDF produced by the long nozzle is always noisier than its counterpart and it is due to the increase of the low-frequency noise components.     

Chemical route to synthesis of mesoporous ZnO thin films and their liquefied petroleum gas sensor performance

In the present work, we report base free chemical bath deposition (CBD) of mesoporous zinc oxide (ZnO) thin films from urea containing bath for liquefied petroleum gas (LPG) sensor application. Mesoporous morphology with average pore size ∼2 μm and wurtzite crystal structure are confirmed from scanning electron microscopy (SEM) and X-ray diffraction (XRD) analysis. The surface of ZnO is hydrophobic with water contact angle 128 ± 1°. Optical study reveals the presence of direct bad gap with energy 3.24 eV. The gas sensing study reveals the mesoporous ZnO is highly selective towards LPG as compared with CO₂ and maximum LPG response of 52% is achieved upon the exposure of 3900 ppm LPG at 573 K as well as good reproducibility and short response/recovery times.     

两用燃料(LPG和汽油)汽车应用分析

针对当前汽车排放造成的环境污染，阐述了两用燃料（LPG和汽油）汽车的基本原理，对两用燃料（LPG和汽油）汽车作出了较为详细的应用分析。     

轻烃回收装置DHX工艺研究(Ⅰ)──原料适应性

用新开发的ＤＨＸ模拟软件对ＤＨＸ工艺进行全流程模拟，并与ＩＳＳ工艺进行对比分析，研究ＤＨＸ工艺对原料的适应性，考察原料气中Ｃ１／Ｃ２比值和Ｃ３＋含量对Ｃ３回收率的影响．结果表明，ＤＨＸ工艺Ｃ３回收率提高的幅度主要取决于原料气中心Ｃ１／Ｃ２比值，而原料气中Ｃ３＋含量对此影响较小．ＤＨＸ工艺的应用受原料气组成的限制．