Biomass briquette combustion system

Abstract

The invention relates to a biomass briquette combustion system. The system comprises a feeding system, a boiler main machine, an economizer, an air preheater, a cyclone dust collector, a bag-type dust collector, an induced draft fan, a chimney and a control system; the feeding system comprises a closed bucket elevator, a closed storage bin, a closed scraper conveyer, a front daily material bin and a screw feeder; a variable-frequency motor is arranged in the screw feeder. Biomass briquette is separated from a combustion fire bed in the boiler main machine through the screw feeder, and the problem of tempering of traditional coal bucket type feeding is completely eradicated; double-layer high-pressure secondary air is designed in the boiler main machine, so that the biomass briquette can be fully combusted in a hearth; a convection section in the boiler main machine is designed to be of a wide-interval, sequential-arrangement and four-return-stroke design structure; the control system is used for automatically controlling boiler feeding, deslagging, hearth temperature, fire grate speed regulation and variable-frequency regulation of the variable-frequency motor and the induced draft fan according to set programs.

Description

technical field [0001] The invention relates to the technical field of biomass fuel combustion, in particular to a biomass briquette fuel combustion system. Background technique [0002] In the prior art, the combustion efficiency of biomass fuel is low, and it is easy to generate a large amount of NOx gas. The traditional biomass boiler feeding system "uses the coal feeder to feed the material into the coal hopper" feeding method, which cannot separate the fuel from the combustion fire bed. This traditional coal hopper feeding has the problem of tempering. The traditional coal hopper feeding device has a short service life and cannot be applied to biomass briquettes made of various raw materials and biomass briquettes of different specifications. [0003] In addition, the furnace capacity of the biomass boiler in the prior art is small, the heating area in the furnace is small, and the biomass fuel cannot be fully burned in the furnace. Due to the combustion characteristic...

AI Technical Summary

Problems solved by technology

[0002] In the prior art, the combustion efficiency of biomass fuel is low, and it is easy to produce a large amount of NOx gas

The traditional biomass boiler feeding system "uses the coal feeder to send the material into the coal hopper" feeding method, which cannot separate the fuel from the combustion fire bed. This traditional coal hopper feeding has the problem of tempering

The traditional coal hopper feeding device has a short service life and cannot be applied to biomass briquettes made of various raw materials and biomass briquettes of different specifications

[0003] In addition, the furnace capacity of the biomass boiler in the prior art is small, the heating area in the furnace is small, and the biomass fuel cannot be fully burned in the furnace. Due to the combustion characteristics of the biomass fuel, the furnace is prone to smoke, and the convection section of the biomass boiler There is also the problem of "easy to accumulate dust and difficult to clean"

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