An air distribution system and fuzzy control method for biomass boilers

Abstract

The invention discloses an air distribution system for a biomass boiler. The air distribution system comprises a combustion chamber, a water wall, air flues, a fire grate, a first air blower, a second air blower and a third air blower. The water wall is mounted on the side wall of the combustion chamber. The air flues comprise the left air flue and the right air flue, penetrate through the inside of the water wall and are oppositely arranged on the two sides of the combustion chamber. The fire grate is obliquely arranged at the bottom of the combustion chamber, and the fire grate and the lower space of the combustion chamber form an air bin. The first air blower is arranged in the air bin and is used for feeding primary air to the combustion chamber from bottom to top. The second air blower is arranged at the bottom of the right air flue and used for feeding secondary air to the middle of the combustion chamber through the air flue on the right side. The third air blower is arranged on the top of the left air flue and used for feeding tertiary air to the upper portion of the combustion chamber through the air flue on the left side. The secondary air and the tertiary air are reasonably distributed to enable biomass fuel and air to make fully contact. The invention further discloses a fully control method for air distribution of the biomass boiler. Evaluation factors are calculated and input into a fuzzy controller, the air speed of the air blowers is controlled precisely, fully combustion of the fuel is guaranteed, and the working efficiency of the boiler is improved.

Description

technical field [0001] The invention relates to a boiler system, in particular to an air distribution system for a biomass boiler and a fuzzy control method for air distribution for a biomass boiler. Background technique [0002] At present, coal is still used as the main fuel for heating in major cities in northern my country, which not only consumes a large amount of coal resources every year, but also causes serious environmental pollution. Biomass fuel has the characteristics of low cost and "zero emission". At present, the formula system of biomass boilers blows air from bottom to top (that is, there is only one blowing passage), which leads to poor air distribution effect, large resistance of flue gas along the way, and The low combustion efficiency of substances leads to high emission concentrations of CO and NO in the flue gas. Therefore, the research and development of heating boilers fueled by biomass has important economic and environmental significance. Content...

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Problems solved by technology

[0002] At present, coal is still the main fuel for heating in major cities in northern my country, which not only consumes a large amount of coal resources every year, but also causes serious environmental pollution.

Biomass fuel has the characteristics of low cost and "zero emission". At present, the formula system of biomass boilers blows air from bottom to top (that is, there is only one blowing passage), which leads to poor air distribution effect, large resistance of flue gas along the way, and The material combustion efficiency is low, which leads to high emission concentrations of CO and NO in the flue gas. Therefore, the research and development of heating boilers fueled by biomass has important economic and environmental significance.

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