Novel rotary air-cooled grate system for biomass boiler

Abstract

The invention discloses a novel rotary air-cooled grate system for a biomass boiler, which comprises a rotating shaft (1), a grate chassis (4), a chassis bracket (5), a grate (6), a primary air duct (7), an air duct bracket (8), a wind deflector (9), a belt pulley (10), a belt (11) and a motor (12). The novel rotary air-cooled grate system for the biomass boiler is characterized in that the rotating shaft (1) rotates to drive the grate (6) to rotate; and air enters the primary air duct (7) through the wind deflector (9) and is uniformly blown towards the grate (6), so that the fuel on the grate is combusted. The novel rotary air-cooled grate system for the biomass boiler has the advantages that firslty, a variable-speed gear can be manually adjusted, so that the grate is low and uniform in rotating speed, and the fuel is uniformly arranged on the grate and is fully combusted; secondly, the shaft and the bearing are cooled by the air, and the self-temperature is effectively reduced, so that the primary air temperature is raised, and the fuel is conveniently combusted; and thirdly, the air supply temperature is changed through the wind deflector, so that the primary air is uniformly blown to the grate; and therefore, the grate is cooled, and the phenomenon that the biomass ash drops on the bearing so as to damage the shaft and accessories is avoided.

Description

technical field [0001] The invention belongs to the field of machinery, and relates to a fire grate system for a biomass hot water boiler, in particular to a circular rotary fire grate system. Background technique [0002] At present, boilers using biomass briquettes as fuel are beginning to enter the industrial market. Small biomass boilers generally use a fixed grate. Due to the low heat of biomass fuel, the fuel consumption per hour is more than twice that of coal, so the grate area is required to be large, which makes it difficult for the fuel to be evenly thrown on the grate. Therefore, it is imperative to design a new grate structure for biomass boilers. [0003] The ventilation rate of the existing biomass fixed grate is low, and the ash and slag are not easy to fall, resulting in serious coking, uneven material layer thickness, and insufficient fuel combustion. Chinese patent application No. 201120496356 patent (rotary grate) specification discloses a biomass boil...

AI Technical Summary

Problems solved by technology

Although the grate makes the fuel evenly distributed on the grate, but the primary air supply is not uniform, the fuel combustion is still insufficient, and the long-term operation of the rotating shaft is easily damaged under the action of stress and high temperature

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