Research On Desulfurization System Upgrading Of Junger Power Company Unit3 And Unit4

The presence of sulfur dioxide has caused a certain degree of harm to the natural environment, human health and development of production. The thermal power plants are often accompanied by the production of pollutants. Along with the increase of pollutant emission standards for power plants, uprating desulfurization system and optimizing the system have become an important topic of plant energy conservation and efficiency improvement.According to the energy-saving plan of The National Development and Reform Commission and The National Energy Administration, the emission limits of sulfur dioxide and dust require to be controlled below 35mg/Nm3 and 5mg/m3 respectively, as mentioned in the Program the Green Power Plan. However, the present emission of the company can’t meet the requirements with 74mg/Nm3 in sulfur dioxide and 30 mg/Nm3 in dust. Therefore, according to the status of quasi-unit operation, Guohua Power Company needs to increase the capacity of desulfurization system and improve its efficiency. In this alteration,#3 and #4 unit will be taken into consideration.This thesis based on the company’s existing status analysis, including the operation of the unit, the status of equipment, the coal, the desulfurization process and the environmental conditions near the plant, then put forward the appropriate transformation plans. There are three major transformation plans mentioned in this paper, including retain rotary GGH; cancel rotary GGH and conduct anti-corrosion transformation to chimney; cancel rotary GGH, increase MGGH. In addition, this article describes two different desulfurization crafts, the spin exchange coupling and the tray wet FDG technology. After considering the cost of renovation, the technical difficulties, the space and other factors of the project, we chose to cancel the rotary GGH, which was determined as the basic scheme. On the basis of this transformation plan, according to the two different desulfurization crafts mentioned above, we can put forward some specific operational transformation plans for each single system in the whole desulfurization systems.