Biomass fuel combustion device

Abstract

The invention discloses a biomass fuel combustion device, and provides a biomass fuel combustion device which has the advantages of high combustion efficiency and less pollutant discharge. The biomass fuel combustion device of the invention comprises a vertical combustion furnace (1), wherein a smoke discharging channel (2) is arranged on the vertical combustion furnace (1); a combustion chamber (20) and a heat exchange chamber (21) are arranged in the vertical combustion furnace (1); an upper grate (3) and a lower grate (4) are arranged in the combustion chamber (20); the combustion chamber (20) is provided with a feeding device which is positioned on the side wall of the vertical combustion furnace (1) and is communicated with the combustion chamber (20); a primary air inlet (33), a secondary air inlet (34) and a tertiary air inlet device are respectively arranged in the corresponding positions of the vertical combustion furnace (1); a smoke pipe (5) and a hot water pipe (6) are arranged in the heat exchange chamber (21); and the smoke pipe (5) is respectively communicated with the combustion chamber (20) and the smoke discharging channel (2) through gas flow. The invention can be widely applied to the field of boilers.

Description

technical field [0001] The invention relates to a biomass fuel combustion device. Background technique [0002] At present, the commonly used fuels in production are generally fossil fuels such as coal, oil, and natural gas. These fossil fuels are non-renewable. According to statistics, these fossil fuels will be exhausted in a hundred years. At the same time, due to the large-scale combustion of fossil fuels, a large amount of carbon dioxide And other greenhouse gases, energy crisis and climate threats, forcing people to vigorously search for new energy sources. [0003] Biomass pellet fuel is a new type of energy, mainly used for gasification and combustion. In 2005, the world's biomass solid briquette fuel production has exceeded 4.2 million tons. As a large agricultural country, China is rich in biomass resources. According to statistics, the total annual output of crop straw in my country is 604 million tons, and the amount of wood residues in the forestry industry i...

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Problems solved by technology

[0005] In order to burn biomass briquette fuel, the existing biomass briquette fuel combustion equipment is improved on the basis of coal-fired boilers, and there are unreasonable air flow field distribution, furnace temperature field distribution, concentration field distribution, and heating surface layout. The phenomenon seriously affects the normal speed and normal condition of biomass briquette fuel combustion, and the exhaust gas temperature exceeds 220°C, resulting in many problems such as low thermal efficiency of the boiler, billowing black smoke, easy slagging, and large floor area.

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