Small and medium sized environment-friendly biomass water heater

Abstract

The invention relates to a small and medium sized environment-friendly biomass water heater. A bottom ash chute and bottom air ducts are formed in the bottom of a water heater body; a fire grate and a biomass fuel layer are arranged above the bottom ash chute and the bottom air ducts; combustion tuyeres are formed in an upper part combustion chamber above the biomass fuel layer; the upper surface of the upper part combustion chamber is connected with a combustion chamber outlet; the volume of air led into the biomass fuel layer from the bottom air ducts is 30 to 50 percent of the volume of air required for complete combustion; other air is fed into the upper part combustion chamber from the combustion tuyeres; the water heater ensures that the biomass fuel layer realizes the pyrolysis and gasification of biomass fuel, a large amount of combustible gas is separated out to be mixed with air fed into the combustion chamber from the combustion tuyeres, combustion is complete, and hot flue gas is emitted out of the water heater from the combustion chamber outlet. Formed NOx in the middle-upper part of the fuel layer can be reduced, so that the water heater shows excellent low NOx emission performance, heat release of the upper combustion chamber in the water heater is obviously increased, the temperature in the water heater is more uniform, the fuel layer temperature of fire grate is reduced, and NOx low emission is realized.

Description

technical field [0001] The invention relates to a biomass fuel burning hot water heater, in particular to a new medium and small-sized environmentally friendly biomass fuel hot water heater. Background technique [0002] The application of biomass fuel is mainly biomass briquette fuel, which uses agricultural and forestry waste as raw materials, and through crushing, mixing, extrusion, drying and other processes, it is made into various shapes (such as block, granular, etc.), which can be A new type of clean fuel for direct combustion. Biomass fuel, as a renewable low-carbon energy source, has the characteristics of cleanness, renewability, low S content, zero CO2 emission, and wide distribution. Its development and utilization are of great significance for reducing fossil fuel consumption and protecting the earth's environment. With the continuous improvement of the country's rural environment improvement and energy structure adjustment policies, biomass energy is becoming...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to overcome the deficiencies in the existing technology of small and medium-sized biomass water heaters, such as direct combustion of biomass fuel, large air supply volume at the bottom, high dust content in flue gas, and high emission of NOx, and provide a new type of realization Small and medium-sized environmentally friendly biomass water heaters for cleaner use of biomass fuels

Images