XINLI BOILER

What are the biomass boiler fuels? Biomass boiler combustion system control method?

07 Jun, 2021

　　Biomass boiler fuel is generally mainly agricultural and forestry wastes, such as straw, sawdust, bagasse, rice bran, etc., which are mainly different from fossil fuels. Biomass boiler fuel can be stacked in the boiler room to facilitate timely feeding of the boiler. In the current national policies and environmental protection standards, direct combustion of biomass is a highly polluting fuel, and it is only used in large stoves in rural areas, and is not allowed to be used in cities. The application of biomass fuel is mainly biomass molding fuel, which uses agricultural and forestry waste as raw materials and is processed into various moldings that can be directly burned through processes such as pulverization, mixing, extrusion, and drying. Clean fuel. Biomass fuel has a large calorific value, the calorific value is about 3900-4800 kcal/kg, and the calorific value after carbonization is as high as 7000-8000 kcal. Biomass fuel is clean and hygienic, convenient to feed, reduces the labor intensity of workers, greatly improves the labor environment, and enterprises will reduce the cost of labor.

　　Under the action of the induced draft fan, the high temperature flue gas produced after the combustion is completed, the biomass boiler enters the dust collector for purification through the convection heat exchange in the flue pipe, and is finally discharged from the chimney through the induced draft fan.

　　1, soot blowing system

　　The boiler is equipped with a fully automatic soot blowing device, which can periodically purge the furnace and flue pipes to ensure that there is no dust accumulation on the surface of the flue pipes, so as to realize the safe and efficient operation of the boiler.

　　2, smoke and wind system

　　 The boiler air supply system is integrated with the burner, and the air is sent to the furnace through the burner through the blower to deliver fuel and support combustion.

　　3, feeding system

　　The boiler is equipped with boiler manholes and hand holes, which is convenient for boiler maintenance at any time. The feeding system is composed of silo, vibrating feeder, screw feeder, screw feeding tube and other components. The fuel processed in the factory is transferred to the silo through a belt conveyor, and then the biomass boiler feeds the BMF fuel in the silo to the burner through the screw feeder for combustion. In order to ensure the stability of continuous unloading and material conveying, a vibrating feeder is connected between the silo and the screw feeder.

　　4, automatic control system

　　 The control system adopts high-brightness, full Chinese display, and uses the famous-brand PLC control system as the central control unit; it exchanges information with boiler users through man-machine dialogue, and realizes the automatic operation of the BMF boiler.

　　 5. Combustion system

　　 Biomass fuel has a preheating process in the burner first, and then the fuel is delivered to the furnace by a fan for combustion. The fuel contains high volatile matter. When the temperature in the furnace reaches the precipitation temperature of its volatile matter, the fuel can be quickly ignited and burned by starting the igniter under the condition of air supply. Burner temperature control.