苯蒸气床层失效预警与仿真研究

Study on Failure Warning and Simulation of Benzene Vapor Bed

为了可靠、高效地实时监测防毒面具中的滤毒罐剩余防护能力,本文详细研究了苯蒸气在ASZM-T型无铬浸渍炭床层中的穿透行为,获得了苯的吸附等温线方程。通过将物料守恒方程、传质方程以及苯吸附等温线方程联立和数值求解,建立了苯蒸气在床层中的失效预警模型和仿真平台。结果表明,该失效预警模型和仿真平台适用于入口恒定浓度和变浓度两种情况,且预测穿透时间与实际测试结果基本一致,相对误差不超过5%。该仿真平台可用于防护装备在以物理吸附方式为主脱除大分子碳氢化合物及其衍生物的过程中剩余防毒能力的预警,提高防护装备的使用可靠性。

In order to reliably and efficiently monitor the remaining protective capacity of the canisters in the gas masks,the penetration behavior of benzene vapor on the ASZM-T chromiumfree impregnated carbon beds was studied in detail and the benzene adsorption isotherm equation was obtained in this paper.A failure warning model and simulation platform for benzene vapor in the bed layer were established by associating and numerically solving the material conservation equation,the mass transfer equation and the benzene adsorption isotherm equation.The results indicated that the failure warning model and simulation platform were suitable for both inlet constant concentration and variable concentration cases.The predicted penetration time was consistent with the actual test results with an error of no more than 5%,and the simulation platform could be used for early warning of the residual anti-gas capability of protective equipment in the process of removing large molecular hydrocarbons and their derivatives mainly by physical adsorption,thus improving the use reliability of protective equipment.