食品级二氧化碳工艺路线技术创新

利用合成氨系统的变换气做原料气,提取CO_(2)进行纯化,最终得到食品级CO_(2)产品。此生产工艺存在干燥不好、水分超标、提纯堵管、无法正常生产等问题,通过分析问题,改变干燥介质、原料气和工艺流程的创新技改,解决了原料气干燥、气浓和不连续供给等制约生产的问题。

冷轧卧式活套带钢跑偏防治

介绍冷轧机组卧式活套内带钢跑偏的现象分析与防治。通过对门辊角度调整、活套门摆臂调整、活套轨道测量以及制作辊子测量工具,保证了转向辊的周期更换,保证了带钢在活套内不跑偏,充分发挥了活套的作用,实现连续稳定生产。

Automatic HAZOP analysis method for unsteady operation in chemical based on qualitative simulation and inference

Comparing with continuous production process, unsteady operation process, such as startup and shutdown,tends to abnormal situations due to a large number of operations of operators and dynamic state changes involved. To guarantee a safe operation, process hazard analysis(PHA) is very important to proactively identify the potential safety problems. In the chemical process industry, hazard and operability(HAZOP) analysis is the most widely used method. In this paper, based on proposed qualitative simulation and inference method, an automatic HAZOP analysis method for unsteady operation processes is proposed. Mass transfer and relationships among process variables are expressed by Petri net–directed graph model based fuzzy logic. Operating procedure is expressed according to a formal expression. Possible operation deviations from normal operating procedure are identified by using a group of guidewords. Hazards are identified automatically by qualitative simulation and inference when wrong operation process is performed. The method is validated by a rectification column system.

智能柱塞在苏里格气田实用先导试验

井下行走智能柱塞利用采集的井下压力温度和时间等信息控制自身流道,实现在井内上下行走。当开启流道时,智能柱塞在重力作用下下行,达到预设值时自动关闭中心流道,受井底气压作用智能柱塞及上部的流体上返至井口,智能柱塞自动开启中心流道,再次下行,如此往复运行,实现对积液气井由上而下,逐级、定量排液,实现连续稳定生产。