Analysis On Energy Intensity Of Shougang Output-cut Project In 2008

Steel manufacturing is a process with consuming resource and energy, and releasing pollutant and waste to surrounding environment. If 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. So, for the long term development, people have been exploring the method of saving energy from the start of iron and steel industry. They hope to gain more steel products with less resource and energy and less pollutant and waste. In the 80s'of last century, academician Lu Zhongwu put forward the concept of system energy conservation, which means using system engineering thought and method to realize the optimized combination of technology measures and production factors, and reach a goal of improving the whole energy saving effect for steel corporation. 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, uses the theory and method of system energy conservation to analyze the energy intensity of Shougang output-cut project. In 2008, facing the holding of Beijing Olympic Games, Shougang has to cut its yield from 8 million ton to 4 million ton and move out from Beijing, as the command of country center and Beijing municipal. It is very important and hard for a steel corporation with an annual output of 8 million ton steel to cut its output to half in a short period. Therefore, through mangy researches and discussion, for the safe production and favorably transition, Shougang will take a phase-out project to stop equipments with three steps, and finally, reach the goal and guarantee the environment quality in Olympic Games time. 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 soft to compile calculating program making the calculation faster and the result more intuitionistic.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, forcasting their changes, especially estimating the change of comprehensive energy intensity per ton of steel and comparable energy intensity per ton of steel. What's more, the thesis also analyzes the influencing factors of comprehensive energy intensity per ton of steel and comparable energy intensity per ton of steel. Moreover, due to the output reduction of steel, there must be some equipments stopped, so, the needed energy and power and the gas byproduct in each manufacturing process will change. For this problem, this thesis also compiles calculating program to forcast the balance problems of energy (power) and gas after cutting output. And at last, this thesis will provide theory support and feasible suggestion for Shougang output-cut project.