Research On Byproduct Gas Scheduling Optimization In Iron And Steel Industry

The total energy consumption of the iron and steel industry is very huge, it accounts for about15%of the country’s total energy consumption. Reducing the energy consumption of iron and steel enterprises is an important measure to ensure the sustainable development of the steel industry. The product gas provides about30percent of its energy needs, as important secondary energy in the iron and steel enterprises. The recovery and utilization efficiency of product gas directly affects the energy consumption of iron and steel enterprises. At present, the gas emission is large and the gas utilization rate is low in most of our country’s iron and steel enterprise, which results in serious energy waste and environmental pollution. Therefore, a comprehensive analysis of the characteristics and function of byproduct gas system in iron and steel enterprises, a scientific scheme of the product gas production and consumption allocation with little emission and high utilization rate are both important for the iron and steel enterprises to reduce the total energy consumption and improve the environment. Byproduct gas system has a complex structure, which includes many occurrence, consumption and allocation aspects. We need to build a mathematical programming model for scheduling optimization of the product gas from a global perspective combined with the practical rule to make a scientific byproduct gas allocation scheme.This paper analyzes the characteristics of the product gas system, the role and operational features of each part of the gas system. The main reason resulting in large emission and low utilization rate of byproduct gas is the volatility of gas production and consumption. Then this paper gives us the importance of optimization of gas scheduling and its objectives. Firstly, this paper abstract and simplify the byproduct gas system, select the appropriate scheduling unit, built the byproduct gas system topology according the scheduling unit and network structure, get the pipe network connection information used in scheduling optimization of byproduct gas. Secondly, according to the role of the various components of the gas system and the actual empirical rule of gas production and consumption balance, the paper proposes the production and consumption planning model and multi-period scheduling model of byproduct gas supply system. Production and consumption planning model concerns those for a long time:byproduct gas supply and demand is balance or not and the byproduct gas distribution can be further optimized or not. The optimization results of production and consumption planning model can be used to assist the making of production plans, explore the utilization potentiality of byproduct gas in the entire iron and steel enterprise and predict the effect of the modification of byproduct gas system. Multi-period scheduling model consists of multiple time periods, consider the production and consumption volatility of byproduct gas completely. The result of multi-period scheduling model can be used to response to the volatility effectively, reduce the emission and improve the utilization efficiency of byproduct gas. Finally, taking the production and consumption planning model and multi-period scheduling model as core, this paper provides the detail execution steps of byproduct gas scheduling optimization method.This paper then verify the validity and optimality of the two models proposed based on the actual byproduct gas system and production consumption data of a steel enterprise. To provide decision support to byproduct gas dispatching, this paper designs the byproduct gas scheduling optimization software for iron and steel enterprise. This software implements the byproduct gas scheduling optimization method proposed in this paper. This software is introduced from three aspects including system structure, module functions and the system implementation.