DEVELOPMENT OF CONTROL ALGORITHM FOR THE NODE CONTACT OF FORMALIN PRODUCTION SUPPLY ADDITIONAL AIR FLOW
The article presents the results of a study distributed over the height and cross-section of the contact layer on the air of formaldehyde synthesis process in the letters-zoserebryanom catalyst. The method of computing experiment on the mathematical model, pre-is a closed system of differential equations for material and heat balances in the grain and in the catalyst bed, and empirically on laboratory-term installation shows that the introduction of a layer of additional air flow catalyst distributed on the section of the bed, an oxygen amount of 0-10% of Audio Output of our main airflow oxygen allows to vary the composition within formalin: methanol 0,7-3,7%, by 37-39% formaldehyde. At the same time there is a cart-possibility to increase the overall conversion and formaldehyde yield of 3-5%. Selectivity (selectivity) of formaldehyde formation when applying additional air is not decreased (remained almost constant) and amounted to 92%. The maximum yield of formaldehyde is observed when entering the secondary air in the contact layer at the level of 2/3 of the height of the space layer input of the reaction mixture. The coincidence of the results of computational and laboratory experiments for reproducibility latter allows us to conclude that the used model adequately researched process, and the resulting patterns for the silver catalyst does not depend on the scale of the device and can be used for the improvement of industrial processes synthesis of formaldehyde. By regression analysis of the results of computational experiment on the mathematical model of static contactor obtained model processes sa synthesis of formaldehyde when submitting an additional amount of air into a layer ca-catalyst. Using the method of linear programming has been optimized formaldehyde synthesis process. It has been established that the objective function - the output odds-formaldehyde peaks in your domain with minimal RATIO-carrying costs and additional primary air flow and maximum-races during the additional air flow. A method for process control of contacting feed additional air quantity-tary in the catalyst layer, which allows to increase yield formaldehyde at 5.3% to reduce the processing temperature of 20-30 K, increase catalyst mileage.