Study On Operation Characteristics And Modification Of 600MW Unit Boiler

The safe and stable operation of thermal power generating units is an important issue in the power industry and even the national economy in China. With the continuous development of China’s economy, thermal power generating units can not only meet their own safe and stable operation, but should pursue a higher economic efficiency. At the same time actively respond to the country’s environmental policies, and strive to achieve the goal of national energy conservation and consumption reduction. As the largest source of cost of thermal power units, coal prices directly affect the profitability of thermal power enterprises. In order to reduce the fuel cost, the lower price of lignite, through reasonable of blended coal, making overall fuel costs get further decline, can greatly improve the enterprise’s profitability, but the attendant will bring a series of problems.600MW thermal power units to improve their profitability, actively carry out many kinds of coal blending, effectively reduces the cost of the fuel, but also brought a series of problems, such as grinding coal machine insufficient drying capacity, serious slagging in boiler, air pre heater access to export the differential increases, outlet of the boiler NOx emissions increase. To solve the above problems, after investigation and expert argumentation, decided corresponding transformation of boiler and auxiliary parts, including the following:air pre heater reversing switch, air pre heater secondary air chamber angle adjustment, air pre heater increase the acoustic blowing dust device, grinding coal machine wind ring transformation, coal grinding machine output transformation, boiler low NOx burners and secondary wind wind transformation doors.Through the implementation of the above transformation can solve the problems of lignite mixed burning after, improve boiler changing the kind of coal adaptability, burning to reduce the cost of enterprise, improve the profitability of enterprises, has a great realistic meaning and practical value.