With the increasing demand for energy in the society, the fossil fuel as the main energy source is decreasing rapidly. Biomass is an ideal renewable energy source, which has a wide range of sources and produces a large amount of industrial, agricultural and forest wastes every year. Biomass energy is a kind of clean and renewable energy, carbon dioxide emission is close to zero, so the use of biomass energy to protect the environment, improve the ecology, improve the living standard of farmers and so on has an important role. The pellet steam boiler operated adopts the latest combustion theory results of Xi ‘an Jiaotong University combined with the latest research and development technology of the company. Biomass fired steam boiler has sufficient output, high thermal efficiency, stable and reliable operation, strong overload capacity, energy saving and environmental protection, and many other advantages, the heating area layout is more reasonable.
Biomass pellet boiler is a single barrel longitudinal chain grate boiler. Suitable for burning molded biomass fuel, or pure coal or mixed coal and molded biomass fuel. There is economizer in the tail. The discharged ash and slag can be directly used as farm manure, which is a kind of high efficiency, energy saving and environmental protection products. Equipped with a drum induced draft fan for mechanical ventilation, and equipped with a spiral slag machine to achieve mechanical slag, complete control and monitoring instruments, safe and reliable operation of the boiler. This series of boilers in the structural design, compared with the traditional boiler furnace space is larger, at the same time layout is very reasonable secondary air, is conducive to the biomass fuel combustion full combustion.
This series of steam boiler adopts double cylinder horizontal structure, completely overcome the cylinder directly exposed to the furnace caused by overheating bulge phenomenon, heating surface layout is more reasonable. The membrane water-wall structure is used on both sides of the furnace, which not only ensures the sealing of the furnace, but also improves the boiler thermal efficiency. Pellet steam boiler operated using convection tube bundle and economizer heating surface parts, reserved soot blower interface, for special fuel can take necessary measures to prevent.
Biomass fired boiler has a high degree of automation, adopting digital integrated controller, which can automatically control the combustion condition according to the user’s setting. Boiler operation is simple and convenient, automatic ignition, automatic feeding, automatic dust removal. Adopting inverted “A” type furnace arch technology to improve fuel combustion characteristics and wide adaptability of coal types. The furnace arch adopts water-cooled structure, which not only increases the rigidity and stability of the furnace arch, but also prolongs its service life. This series steam boiler adopts unique secondary air structure, effectively improve the air field in the furnace, will be hot particles lead forward arch, is conducive to the ignition of fuel ignition, but also extend the fuel in the furnace residence time, improve the adaptability and utilization of fuel.
Water cooling walls are arranged on both sides of the boiler to form a furnace and convection flue, a single return thread flue pipe is arranged in the boiler drum, which has larger combustion space and enough height, so that the fuel has sufficient combustion time in the furnace, and a cast iron economizer is installed at the end. The front arch and back arch of water cooling are used in the furnace. The front arch is stepped and the rear arch is herringbone, making the arch coverage rate close to 85%, which is conducive to the burning of bituminous coal. Pellet steam boiler operated using large – block chain grate to achieve mechanical combustion. With a drum induced draft fan for mechanical ventilation, there is enough secondary air in a certain height of the furnace, and with a slag discharging machine to achieve mechanical slag, control and monitoring instruments are complete.