Feeding device of pneumatic scattering type biomass combustor

Abstract

The invention discloses a feeding device of a pneumatic scattering type biomass combustor. The feeding device of the pneumatic scattering type biomass combustor comprises a pneumatic scattering tube,a confluence tube, an inverted scattering sheet, a guide sheet, a spraying sub-tube, a fuel gate, a one-way fireproof door and a blower, wherein a feeding screw rod, a variable-frequency motor, a fuelelbow and a fuel pipe form a fuel pre-conveying mechanism, the blower and an air flow tube form a pneumatic supply mechanism, when the blower and the variable-frequency motor are started, fuel in a material bin falls into the air flow tube through the feeding screw rod, the high-speed air flow generated by the blower blows the one-way fireproof door out on one hand, on the other hand, the fuel which falls into the air flow tube is sprayed into a hearth in different directions through the spraying sub-tube, the fuel uniformly falls on a fire grate, the high-speed airflow or the one-way fireproof door prevents smoke and flame from overflowing outwards, so that reverse smoke and tempering are not easy to occur, the fuel can be distributed on the large-area fire grate, so that the problems that the large-power combustor is large in fire grate, uneven in fuel distribution and unstable in combustion working condition are solved, and the problems of the tempering and the reverse smoke of a traditional spiral feeding device and a piston feeding device are solved.

Description

technical field [0001] The invention relates to a feeding device for a biomass burner, in particular to an aerodynamic scattering type biomass burner feeding device, which belongs to the technical field of biomass energy utilization. Background technique [0002] Traditional biomass burners have two forms of screw feeding and cylinder feeding, among which the screw conveyor is the most common feeding device. It has the advantages of simple structure, small and compact size, convenient operation and management, safe and reliable use, and relatively low price. , but the biomass burner is under positive pressure combustion during combustion, and the fuel embedded in the recessed part of the screw of the screw conveyor is easy to ignite, that is, the screw feeding method is prone to tempering or pouring smoke, and the tempering makes the inside of the silo Biomass particles are burned, or even a fire occurs, and pouring smoke will make the workplace full of smoke; although the c...

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Problems solved by technology

[0002] Traditional biomass burners have two forms of screw feeding and cylinder feeding, among which the screw conveyor is the most common feeding device. It has the advantages of simple structure, small and compact size, convenient operation and management, safe and reliable use, and relatively low price. , but the biomass burner is under positive pressure combustion during combustion, and the fuel embedded in the concave part of the screw of the screw conveyor is easy to ignite, that is, the screw feeding method is prone to tempering or pouring smoke, and the tempering makes the inside of the silo Biomass particles are burned, or even a fire occurs, and the smoke will make the workplace full of smoke; although the cylinder piston feeding method basically solves the tempering problem, it is easy to suck the smoke in the furnace out of the furnace when the cylinder is withdrawn, that is, the cylinder piston The smoke falling phenomenon of the feeder is even more serious. At the same time, the piston ring of the cylinder is generally dry-grinded, easy to wear, and cannot run for a long time; The cloth (distribution of fuel) on the row is very uneven. The fuel pile on the side close to the feed inlet is relatively high and thick, and the fuel pile on the side away from the feed inlet is relatively low and thin. This situation is very harmful to the grate It is more prominent for a burner with a large area, which affects the combustion efficiency and combustion quality of the fuel to a certain extent

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