Dust cloud evolution and flame propagation of organic dust deflagration under low wall influence

The present study discusses experiments on organic dust explosions in a setup with low wall influence. The proposed apparatus decouples the dust dispersion and the deflagration event in two separate compartments. The use of a continuous-wave laser to illuminate the centre plane of the observation chamber allows capturing both, the dust cloud and the flame during the same experiment and eliminates typical problems caused by the limited dynamic range of high-speed cameras. A k-means clustering method is used for image segmentation to obtain the spatial extent and the propagation velocities of the unreacted particle cloud and the flame zone. Spatially resolved velocities are calculated by the additional use of an optical flow method. The main goal of the presented setup and image processing method is to provide high quality validation data for the development of numerical models on dust deflagration.     

油气膜分离回收技术在汽油装车系统的应用

炼化企业油气回收作为一种清洁生产工艺,具有较好的应用前景。2006年5月,哈尔滨石化公司建成应用膜分离技术的油气回收装置,并将该技术应用于汽油装车系统。经过现场评价,装置处理能力为650m~3/h时,油气排放浓度为14 g/m~3,油气处理效率达97%,均满足《储油库大气污染物排放标准》(GB 20950 -2007)的要求。     

活动式大罐收气装置及油气混输新工艺的应用

为了解决东营地区油罐每天都向大气排放工业废气，对环境造成污染的问题，研制了“活动式大罐收气装置”新工艺，用于回收联合站储油罐挥发气。该装置通过玻璃钢管线与油罐连接，油罐挥发气沿玻璃钢管线输至机房内气液分离器，分离出气中的水和轻质油，由天然气压缩机加压，经流量计计量后进入油田天然气气管网。该工艺推广后，经监测结果表明，所有采样点总烃含量低于国家标准２．０ｍｇ／ｍ３。目前全油田３０个联合站安装了此设施，每年回收天然气５１２５万ｍ３，轻质油７０００ｔ。