Feeding device for small biomass granular fuel boiler

Abstract

The invention relates to a biomass fuel boiler and in particular to a feeding device for a small biomass granular fuel boiler. The feeding device comprises a storage bin driven by a motor, a feeding mechanism, a push mechanism, a poking mechanism and a step-like fire bed. A feeding overturning plate in the feeding mechanism is arranged at the lower end of the storage bin. One side of the feeding overturning plate is hinged to the storage bin, and the other side of the feeding overturning plate is clamped to an edge protrusion of the storage bin. The push mechanism is arranged on a first layer of step of the step-like fire bed and can slide on the first layer of step. The feeding mechanism is hinged to the push mechanism. The poking mechanism is arranged on the lower portion of the storage bin and connected with the feeding mechanism in a transmission manner. According to the feeding device for the small biomass granular fuel boiler, the flow property and the pile angle feature of biomass granular fuel are utilized, and automatic discharging is achieved; the problem that flame in a hearth spreads and burns the material bin, and fire spreading is caused is prevented; besides, ash loosening and fire poking functions are achieved, and coking is prevented; a fire bed storage furnace supplies heat, radiates heat and carries out heat convection; and one-time wind-fire bed surface supply is achieved, a granular fuel solid part is fully burned, and therefore the burn-out rate is increased.

Description

technical field [0001] The invention relates to a biomass fuel boiler, in particular to a small biomass particle fuel boiler feeding device. Background technique [0002] Biomass fuel has gradually been valued by people because of its advantages of green environmental protection and renewable. Therefore, various forms of boilers using biomass fuel have been produced. In actual use, the problems of biomass fuel are also exposed, such as: the proportion of volatile matter in biomass fuel is large, the precipitation temperature is low, and the precipitation time is concentrated. If the feeding method is the same as that of coal-fired boilers, it will produce short-term concentration of volatile matter. It is precipitated, and it is too late to fully burn, and it is discharged with the flue gas, and black smoke appears. At the same time, because the proportion of the solid part of the biomass fuel is relatively small, the interval between the last feeding and the next feeding w...

AI Technical Summary

Problems solved by technology

Especially at the discharge end of the screw conveyor, due to the high temperature near the furnace, the dust is relatively large, and the rotating support and lubrication system are easily damaged.

In addition, the screw conveyor transports the fuel continuously, and the ignition temperature of the biomass pellet fuel is relatively low, and there is a danger of string burning to the fuel bin

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