Introduction of knowledge points about the furnace of pulverized coal boiler

　　The furnace of a pulverized coal boiler is the place where fuel is burned. It is surrounded by an evaporating heating surface (water-cooled wall), sometimes with a wall-type heat radiator, and the furnace is also a place for heat exchange, which is one of the important parts of the boiler. Its furnace must not only allow the combustion of fuel, but also rationally organize the heat exchange in the furnace, and arrange the appropriate heating surface to meet the requirements of the boiler capacity. When the flue gas reaches the furnace outlet, it is cooled so that the convective heating surface behind it is not condensed. Allowable temperature for slag and safe work.

　　Its hearth is where the fuel burns. It is surrounded by evaporative heating surfaces, sometimes with wall-type heat exchangers, and the furnace is also a place for heat exchange, which is one of the important parts of the boiler. Its furnace must not only ensure the combustion of fuel, but also reasonably organize the heat exchange in the furnace, and arrange the appropriate heating surface to meet the requirements of the boiler capacity. When the flue gas reaches the furnace outlet, it is cooled so that the convective heating surface behind it is not condensed. Allowable temperature for slag and stable work.

　　The structure of the furnace should meet the following requirements:

　　1. Reasonably arrange to accelerate the ignition of the fuel: There is a good aerodynamic field in the furnace to make the heat load on each wall uniform; it is necessary to make the flame in the furnace full and reduce the dead zone of the airflow. Also, avoid the flame from rushing into the wall to avoid slagging.

　　2. The furnace must have a corresponding volume and height to ensure the residence time and combustion of the fuel in the furnace.

　　3. Appropriate evaporative heating surface can be arranged to meet the requirements of boiler capacity: the temperature of flue gas at the outlet of the furnace is appropriate to ensure that the heating surface does not form slag and work stably on and after the protection chamber.

　　4. The furnace structure is compact, and the amount of metal and other materials is small; it is easy to manufacture, install, operate and maintain.