Research On Dynamic Simulation And Optimization Of Oxygen System In Copper Smelting Enterprises

Oxygen is an important energy medium necessary for the production of copper smelting enterprises.According to the actual production statistics of some large copper smelting enterprise,power consumption of oxygen generation accounts for about 23%of the total power consumption in the enterprise,and the cost of oxygen generation is high.Currently,how to balance the production and consumption of oxygen and reduce the emission of the oxygen system in copper smelting enterprises is a difficult problem that need to solve urgently.At present,the research on oxygen supply and demand balance is mainly concentrated in the iron and steel industry,and less research in the copper smelting industry.Therefore,it is necessary to further study the oxygen supply and demand balance of copper smelting enterprises.In this paper,through the research on the simulation and optimization scheduling for the oxygen system in copper smelting enterprises,it can balance the oxygen production and consumption,reduce the oxygen emission,and save energy resources for copper smelting enterprises.This research has important theoretical significance and practical application value for system energy saving,cost reducing and efficiency increasing of the copper smelting enterprise.Firstly,the characteristics of oxygen production system,oxygen buffer storage system and oxygen consumption system in copper smelting enterprises is analyzed.Then the oxygen consumption rhythm and fluctuation characteristics of the main oxygen consumption in copper smelting enterprises are researched.Lastly,the corresponding mathematical models are established for each subsystem in the oxygen system.Secondly,it introduced the functions and features of the Simulink simulation tools in MATLAB.After that,taking the oxygen system of a copper smelting enterprise as the research object,the four layers dynamic simulation model was established by the Simulink simulation tool,which used Simulink simulation tool.Then,the structure and function of the model were described.The model was divided into four layers.The first layer was modeled for the three subsystems of the oxygen system,which were oxygen production subsystem,oxygen buffer storage subsystem and oxygen consumption subsystem.In the second layer,the system sub-model of the first layer was modeled,such as the sub-model of oxygen production system was composed of the model of 16000m3/h oxygen generator model and the model of 6500m3/h oxygen generator.The third layer was realized by the simulation of the second sub-model,such as the 16000m3/h oxygen generator model,which was composed of the pressure conversion sub-model and the flow control PID sub-model.The fourth layer was at the bottom of the model,and the simulation function components of the third layers were modeled by the basic components of the Simulink simulation tool,such as flow control PID submodule consists of two input modules,two summing modules,one PID control module,one growth module,and an output module the module is constructed.Finally,the historical production data of the oxygen system in a copper smelting enterprise are used to do the model verification and model application of the four-layer dynamic simulation model in Simulink.The research results show that:(1)The difference between the production of oxygen production,system and the average consumption of oxygen consumption system in the copper smelting enterprise is smaller,the oxygen emission rate is lower;(2)The enterprise build suitable oxygen liquefaction device,oxygen gasification device and liquid oxygen tank,can make the oxygen emission rate of the enterprise decrease to zero,and can provide a part of liquid oxygen products for export;(3)In the copper smelting enterprise,when the volume of the spherical tank is increased from 2400m3 to 3200m3 and the maximum working pressure is constant,the oxygen emission rate is decreased from 8.2%to 7.1%;while the maximum working pressure of the pipe network and the spherical tank is increased from 2.8MPa to 3.1 MPa with the same volume,the oxygen emission rate of oxygen system is decreased from 8.2%to 4.7%;(4)Optimization of the production plan of PS Converter workshop in refinery branches of copper smelting enterprises is able to balance the oxygen supply and consumption of the enterprise scientifically and effectively,reduce the oxygen emission rate of the oxygen system.The production planning curve of No.2 PS converter shall be shifted forward for 12 hours,and that of No.4 PS converter shall be shifted forward for 20 hours curve,then the emission rate of oxygen system is decreased from 8.2%to 7.6%.Therefore,the research work can provide a new way for optimizing the oxygen production and scheduling scheme of copper smelting enterprises,and balance oxygen production and consumption,reduce the amount of oxygen emission of the enterprise and provide a new means and decision support for the production cost through the application of the research results.