Safety Assessment And Dynamic Control Of Hydrogen Peroxide Production Process

The hydrogen peroxide production device is a dangerous goods production device.Therefore,it is of great practical significance to carry out the intrinsic safety assessment and dynamic control of the hydrogen peroxide process route.In order to make the assessment results more scientific and make up for the defects in qualitative safety assessment methods,quantitative safety assessment is combined with process simulation to study the safety and hazard sources of hydrogen peroxide production equipment in this dissertation.Through dynamic simulation and control,the dynamic effects of disturbance on the entire system are discussed.In this paper,the inherent safety of three different hydrogen peroxide production processes was evaluated using a Graphical Descriptive Technique for Inherent Safety Assessment(GRAND).The quantitative risk levels of different processes were obtained.Moreover,it was found that anthraquinone based route is the most hazardous of the hydrogen peroxide manufacturing process by the method of 2-Dimensional Graphical Rating(2DGR)for the similar risk level of direct synthesis of hydrogen and oxygen and the anthraquinone process.In addition,the hazards of anthraquinone process were identified by GRAND analysis.It has important theoretical value for the safety production and early warning of hydrogen peroxide.In order to better understand the hazard sources in the production device,solve the bottleneck problem in safe production,and provide convenient technical support,this article used Aspen Plus process simulation software to simulate the process of100,000 t/a 35% hydrogen peroxide device,the Physical Property Estimation System(PCES)solves the problem of lack of physical parameters in raw materials.The influence of various factors such as temperature and pressure on the hydrogenationprocess and the oxidation process was analyzed,and the effects of different extractant dosages and the number of plates on the extraction process were analyzed,and the range of variation of the process parameters was obtained.Based on the analysis results of GRAND hazard sources and steady-state simulations,the influence of oxygen content of the system on the safety of the hydrogenation process is discussed in the case of different ratios of the hydrogenation fluid circulation.The results show that keeping 30% of the amount of hydrogenation fluid circulating can effectively reduce the risk and achieve safe production.Finally,in order to further understand the abnormal working conditions of the hydrogen peroxide production process,dynamic simulation was applied on the100,000 t/a 35% hydrogen peroxide device using Aspen Dynamic.The effect of ± 5%of hydrogen,oxygen,and pure water flow disturbances on the entire system was analyzed.The raffinate concentration plays an important role in the safe operation of the entire system.For ± 5% feed disturbance,by using the appropriate component control scheme,the peroxide concentration in the raffinate can be controlled within the range of 0.1572 to 0.1590 g/L to ensure the safe production of the system.It has a certain guiding effect on the actual factory operation process.