Sale Biomass Boiler 2 MW

Structure of biomass fuel hot water boiler

At present, China has many types of biomass fuel hot water boilers, which can be divided into wood pellet boilers and straw pellet boilers according to fuel types, and can be divided into household and commercial types according to application occasions. Downdraft fixed double-layer grate hot water heater is a widely used structural form, which fully considers the combustion characteristics of biomass fuel. It consists of furnace door, grate, hearth, heating surface, air chamber, dust chamber, furnace wall, Exhaust pipe, flue, chimney and other main components.

The biomass fuel hot water boiler adopts a double-layer grate structure, that is, a steel tube type grate with a water cooling at a certain height of the hand-fired grate, and its curved pipe is directly inserted into the upper drum, this design increases on the one hand The water-cooled grate heat absorption area, on the other hand, accelerates the heat transfer between the grate and the return water in the drum.

The fuel combustion adopts the downward suction combustion method. The formed fuel is added to the upper grate by the upper furnace door for preheating and combustion. Due to the guidance of the fan, the new fuel will not directly encounter high-temperature superheated flue gas, which delays the concentrated precipitation of volatiles, thereby avoiding the fluctuation of the furnace temperature. , So that the combustion tends to be stable; at the same time, the volatiles must be fully mixed with the air through the high-temperature oxide layer, and burned in the gap between the coke particles; after the completion of a combustion process, the fuel chips and ash formed on the upper grate leak to Lower the furnace and continue to burn until the embers burn.

Energy saving advantages of biomass hot water boiler

(1) Biomass fuel hot water boilers, based on the characteristics of biomass fuel itself, combined with combustion theory, fully tap the energy-saving potential in the structural design of grate and furnace, radiation and convection heating surface, and furnace door. The combustion efficiency of the boiler can reach 94.84%, and the thermal efficiency is 78.2% ~ 81.25%.

(2) Biomass fuel hot water boiler has certain advantages in technical performance. In terms of energy saving, the boiler’s thermal efficiency and combustion efficiency are higher than traditional coal-fired boilers, far exceeding national standards; in terms of exhaust gas emissions, the NOx, CO, SO2 and soot contents of smoke are lower than coal-fired boilers, which meets the requirements of clean energy.

(3) The operating cost of biomass fuel hot water boiler is lower than other types of equipment, although its fixed asset input fee is relatively high at present. With the improvement of energy saving and environmental protection requirements, such boilers will have more and more advantages in economic benefits.