Optimization Model Of Gas Detector Placement And Experimental Verification In Refining Plant

This paper takes the refinery diesel hydrogenation unit as the research object,carried out the study of gas detector layout optimization problems systematically and construct a hydrogen sulfide leak scenario set.A detector placement optimization model that considers the detector’s multi-level voting logic is established while the minimizing cumulative detection risk was regarded as optimization objective.A model is established with YALMIP and the solution scheme of quantitative optimization of gas detector layout is solved by using CPLEX.An experimental model of the research device with a numerical method based on similarity theory and three-dimensional fine model was built.Verify the scientific nature of the mathematical model through experiments.1.Scenario tree modeling method for leakage accident scenario set based on scenario analysisTaking leakage source and wind field conditions as the main random factors,use the LHS(Latin Hypercube Sampling)method to obtain the basic sample scenario.Quantificationally construct the hazardous gas leakage scenario set by scenario tree method.Replace the original mass of scenarios with few representative scenarios.While the scenario tree is constructed,the scenario reduction is achieved by synchronous regression elimination method.Determine the scenario to be deleted by calculating the Euclidean distance.Combining the scenario occurrence probability,ensure that the number of remaining scenarios is eventually reduced to the desired setting value N,forming a tree-like scenario set2.Construction of Optimization Mathematical Model of Gas Detector Layout Considering the Multi-Level Voting Logic of Detector.Based on the code for detection and alarm of detectors,a detector location optimization model is constructed around the location optimization strategy of detection time.Study the effect of detector multi-level redundant voting logic(multi-level alarm)on detector location scheme.Construct a model for minimizing the cumulative detection time of gas detectors considering detector multi-level voting logic(MDTP-Vm).3.Solution of optimization model and case analysisA set tree of hydrogen sulfide leakage scenarios was constructed for diesel hydrogenation plant.YALMIP was used to model the model of layout optimization and solved by CPLEX.The optimal detector layout for gas leak detection in all scenarios was gotted.4.Experimental study on optimization of gas detector layout.Set the gas detector placement scheme on the physical physical model.Design experiment scheme by uniform experiment.According to the experimental requirements and objectives,completed each scenario leakage experiment.The experimental data are compared with the simulated data,and the relative error and the mean square root error are used as the quantitative indexes to determine the reliability and dispersion of simulated data.Based on the simulation data,the detector layout scheme is verified by exhaustive attack method.Thus,the scientific and effective layout optimization method is verified.