Biomass vaporization gas-powder mixed combustor

Abstract

The invention discloses a biomass gasification gas-powder mixed combustor which comprises a coarse storage bin, a fine storage bin, a first feeder, a secondary feeder, a biomass vaporizing chamber and a gas-powder mixed chamber which are respectively provided with a clamping sleeve, a first air pipe line, a secondary air pipe line and a slag removal notch, wherein biomass fuels in two storage bins respectively enter the biomass vaporizing chamber and the gas-powder mixed chamber through a first feeder and a secondary feeder, a jacket of the biomass vaporizing chamber is composed of an inner furnace wall and an outer furnace wall, preheated air enters the biomass vaporizing chamber through the jacket of the biomass vaporizing chamber; the combustion process of the biomass comprises two stages, step 1. air vaporization: converting the biomass into combustible gas, and introducing the combustible gas into the gas-powder mixed chamber to mix; and step 2. according to the biomass semicoke content, changing the feeding amounts of the two feeders to improve the combustion conditions, combusting the biomass fuels by adopting the biomass vaporizing chamber and the gas-powder mixed chamber. The invention has the advantages that the possibility that a volatile matter is split into black carbon difficult to combust is lowered, thus the phenomenon of emitting black smoke is decreased, and the existing biomass boiler combustion efficiency is improved.

Description

technical field [0001] The invention relates to a combustion device, in particular to a powdery biomass burner capable of utilizing renewable energy biomass. Background technique [0002] Biomass energy is the energy that fixes the energy of solar radiation in the form of biomass through the photosynthesis of green plants. Biomass energy, as a renewable energy source, can partially alleviate human dependence on other non-renewable resources. Compared with coal burning, biomass fuel has the characteristics of high volatile content, fast pyrolysis speed, low energy density, easy slagging during combustion, and corrosion to metal equipment. When the existing equipment is directly converted to burn biomass fuel, due to the large difference between the design fuel of the original equipment and the properties of biomass, there are often problems such as insufficient equipment output and unstable combustion. The reason is that the furnace of the coal-fired boiler is small. As a r...

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Problems solved by technology

Publication No. CN 101196296A "Biomass Boiling Gasification Combustion Method and Device" clarifies the secondary combustion method of first gasification and then combustion, but does not consider the combustion rate of gasification gas and semi-coke in its patent , so there may be defects such as unstable ignition and high ash content in the flue gas

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