| 摘要 |
The invention covers a gravity burner and a wood pellet biomass burning process, purposed to produce thermal energy that could be converted into electrical energy. According to the invention, the burner consists of a dozer 45, of a combustion chamber 20 having an L-shaped grating 21 at the inferior side located on one of the side walls towards the up side of the chamber 20, of an area 23 for microparticle coagulation where the secondary air enters evenly and causes full gas burning, of a system for distribution 30 of the preheated air from some absorption tubes that cover the gas discharge tubes of the equipment that incorporates it, and at the end of which an exhauster is mounted, of an ash pan 46, of a metallic case with some support elements, of a coupling system to the pellet hopper and of a slot 60 for exhausting the burnt gas at the set temperature. According to the invention, the process consists of simultaneous firing of the wood pellets on the entire length of the combustion chamber, at the base of a grating where a firing device that has a length similar to the one of the combustion chamber is located, on both its height and width, forming two incandescent pellet layers at temperatures over 10000°C, one at the base of the grating and another one on the grating of the microparticle coagulation and full burning area and through the air distribution manner, where after reaching the set temperature, the combustion air is closed and the secondary air is reduced.
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