Biomass shaping fuel decoupling combustion device and combustion method thereof

Abstract

The invention relates to a decoupling combustion device for the biomass briquetting fuel and the combustion method. The device comprises a vertical combustion furnace, a combustion chamber and a pyrolysis chamber; the bottom of the combustion chamber is communicated with the bottom of the pyrolysis chamber; a hopper is mounted on top of the pyrolysis chamber; a gate is mounted at the lower part of the combustion chamber. The invention is characterized in that a screw conveyor is mounted at the lower part of the pyrolysis chamber; a flue gas interlayer is mounted on the outside wall of the pyrolysis chamber, which is communicated with a flue gas channel at the lower part of the furnace body; an air duct is mounted at the lower part of the gate; a flue gas baffle is mounted in the combustion chamber; the upper part of the flue gas baffle is communicated with the flue gas interlayer. The method is combined with the combustion characteristic of the biomass briquetting fuel, which processes the pyrolysis and the combustion of the biomass briquetting fuel respectively in two areas with different temperature; the method alleviates the contradiction that the pyrolysis speed does not match with the combustion speed; the method eliminates the coupling of different pollutants in the generation process, reduces the loss of incomplete combustion and decreases the discharging amount of the pollutants such as CO and NOx through the re-organization of the combustion of the volatile and the char.

Description

technical field [0001] The invention relates to a combustion device and a combustion method of biomass briquette fuel, in particular to a decoupled combustion that can reduce the emission of soot, nitrogen oxides and carbon monoxide from combustion of biomass briquette fuel, and improve the utilization efficiency of biomass briquette fuel Apparatus and combustion method thereof. Background technique [0002] Biomass is a renewable energy source that does not increase CO in the atmosphere during utilization 2 net emissions, reducing the greenhouse effect. With the lack of fossil energy and the enhancement of environmental awareness, the efficient and clean utilization of biomass has attracted much attention. my country is rich in biomass energy, but the volume density of biomass is small, the stacking volume is large, storage and transportation are difficult, and the biomass has a lot of volatile matter, so the combustion of coke and volatile matter are not synchronized, an...

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Problems solved by technology

However, the double-layer inclined grate used in this device has high requirements on the fluidity of the fuel, and because a large amount of volatile matter generated will directly enter the combustion chamber from the communication hole opened on the partition plate for combustion, the volatile matter and semi-coke are combusted together. The degree is weak, which is not conducive to the burnout of semi-coke with low calorific value; in addition, the organization of primary air, secondary air and tertiary air in the combustion furnace is difficult to achieve in small combustion equipment

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