Multilevel Input-output Model Analysis In Steel Industry

With the development of steel enterprises, the steel output becomes more and more, more resource and energy will be consumed and more pollutant and waste will be released. Thus, it will tense the station of our resource and energy, besides it also will cause severe pollution to outside.Appling the theory and method of system energy conservation, many problems such as resource and energy consumption, environment pollution and the interrelation of them have been analyzed in order to improve the whole energy saving effect for steel enterprises. In recent years, with the application of system energy conservation and its achievements in manufacturing practice, the concept of system energy conservation spreads, and the theory of system energy conservation has become perfect gradually, and it also has been more used in steelmaking engineering.This thesis takes the whole production system of Shougang (Beijing district) as subject. Firstly the basic concept of input-output method and e-p method of system energy conservation method has been introduced; Secondly, the productive actuality and output-cut project of Shougang have also been introduced; Thirdly, the thesis takes Shougang's energy balance sheet in 2006 and other production data as database, chooses input-output method and e-p method of system energy conservation method to set up the input-output model and e-p model of Shougang production system respectively, meanwhile, uses MATLAB software to compile calculating program making the calculation faster and the result more intuitionistic. Users can use the software to make an analysis for Shougang pressure of energy production program and be provided with the basis and reference of it.The input-output table in this thesis is different from ordinary ones. And it has been improved much more. This mathematical model of the iron and steel enterprises uses Excel as the database table, Users can excel in the table in accordance with the provisions of entry in the table of the corresponding enterprises basic data (all the major production logistics, the main production processes in the monomer equipment consumption, outsourcing to the value of energy (or heat value) and the products they produce for export). By model calculation, there will be the output data (business metric tons overall energy consumption, the processes of energy consumption, the energy of products, the number of products they produce, and energy and non-energy products purchase volume, etc.) into the excel indicators table. So the input-output tables have not specific restrictions and can be used in other steel enterprises.It is necessary to check the veracity of MATLAB calculating program, so the thesis calculates the basic database at first, on the correct condition, compiles the input-output program of the three phase output-cut projects respectively, and calculates the main indicators such as process product yield, comprehensive energy intensity per ton of steel, comparable energy intensity per ton of steel, process energy intensity and steel ratio, forecasting their changes, especially estimating the change of comprehensive energy intensity per ton of steel. This thesis using multilevel input-output model analyze the composing of energy sources, calculate integrative energy intensity, forecast energy requirement, assess energy sources, etc. It is valuable for energy sources manager in theory aspect and practicality.