Abstract
The first part of this study will explore the influence of impurities (SO_2 、H_2 S) of the manufacturing process . First, China Steel Corporation blast furnace gas containing impurities SO_2 components that dissolved in water and reacted with ammonium ions to produce a chemical reaction salt, so when the blast furnace gas contains SO_2, it is recommended to absorb SO_2 via pre-treatment tower, after, re-use diluted ammonia absorption CO_2. Second, the company's steel-product coke oven gas as a cleaning after DA (Deacidifier Water, which contains H_2 S), to capture the carbon dioxide will be released impurities to the exhaust gas, the study will use of ASPEN Plus to investigate deacidifier water as ammonia absorber makeup, its ammonia content after washing process is below emission standards. However, considering the capture of CO_2 in H_2 S accounting for 200 ppm, high levels of impact on the environment, and therefore require the use of high-pressure and relief to get relatively clean aqueous ammonia to deacidifier wate in fewer impurities, and thus closer to the pure ammonia. The second part of this study is the blast furnace gas (BFG) composition was changed Yu et al. (2011) power plant flue gas composition conditions provided, the assessment of heat regeneration requires two conventional process and requires only a source of energy for advanced process energy consumption decreased from 7.06 GJ / ton-CO_2 to 4.63 GJ / ton-CO_2. Furthermore, raising the pressure to improve the regeneration tower for the ammonia concentration of ammonia in the process of influence, the use of atmospheric pressure (one atmospheric pressure) as a standard of comparison, which increase pressure of the CO_(2 ) regeneration tower required for lower energy.