What are the unique advantages of CFB boiler?
At present, China attaches great importance to the environment in the future, the load regulation range of large coal-fired power plants increases, a variety of coal sources and the contradiction between environmental protection and coal-fired make China choose the high efficiency and low pollution circulating fluidized bed boiler as a new coal-fired technology.
Advantages: due to the unique hydrodynamic characteristics and structure of circulating fluidized bed boiler, it has many unique advantages, which are briefly described below.
1. Fuel adaptability: This is one of the main characteristics of CFB boiler. In the circulating fluidized bed boiler, the fuel accounts for only 1% - 3% of the bed material by weight, and the others are non combustible solid particles, such as desulfurizer, ash or sand. The special hydrodynamic characteristics of circulating fluidized bed boiler make the gas, solid and solid fuel mix very well. Therefore, the fuel is mixed with a large number of bed materials quickly after entering the furnace, and the fuel is heated to higher than the ignition temperature at this speed, while the bed temperature does not decrease significantly, as long as the calorific value of the fuel is greater than the heat required to heat the fuel itself and the air required by the fuel to the ignition temperature. The circulating fluidized bed boiler can use not only high-quality coal, but also various inferior coal, such as high ash coal, high sulfur coal, high ash high sulfur coal, coal gangue, peat, oil shale, petroleum coke, slag bark, waste wood, garbage, etc.
2. High combustion efficiency: the combustion efficiency of CFB b