Boiler combustion method for biomass fuel and boiler for biomass fuel

Abstract

The invention discloses a boiler combustion method for a biomass fuel and a boiler for the biomass fuel, wherein the boiler combustion method is simple and easy to implement and is high in utilization efficiency of the fuel and high in running efficiency. By utilizing the characteristics of the biomass fuel that a large amount of gas is generated during a combustion process and a high-temperature flame is generated by secondary combustion in a gas form, a storage device is arranged in a boiler furnace according to the boiler combustion method, and the storage device is used for secondarily distributing and combusting the gas. The boiler comprises a furnace, a corresponding front arch, a rear arch and a grate, wherein a gas storage cabin with a gas inlet is arranged on the rear arch and a plurality of fire holes are distributed on a top wall of the gas storage cabin.

Description

technical field [0001] The invention relates to a boiler, in particular to a biomass fuel boiler combustion method and the boiler. Background technique [0002] With the increasing shortage of fossil fuels such as oil and natural gas, the research and development of renewable energy and other alternative energy sources are more urgent. Compared with petrochemical energy, biomass energy not only has a wide range of sources, but also has low cost. In particular, the net CO2 emission of biomass energy is zero, which can effectively alleviate the greenhouse effect. Its sulfur and nitrogen content are very low, and its ash content is also very small , so the development and utilization of biomass energy is an effective way to alleviate energy and environmental pressure and establish a sustainable energy system. However, the direct use of biomass in existing coal-fired boilers or other existing boilers cannot give full play to the many advantages of biomass energy in energy savin...

AI Technical Summary

Problems solved by technology

[0004] But for plant fuel, because its ignition point is relatively low and easy to ignite, its furnace structure and chain grate are not suitable for plant fuel, especially the furnace structure of its front arch or front and rear arches. If you continue to use the existing The combustion condition of the furnace structure used for coal as fuel will become very poor, which not only directly affects the production efficiency of the boiler, but also due to its low calorific value, the combined effect of the two may make the boiler unable to produce steam normally

Therefore, direct use of existing chain boilers including chain boilers to burn biomass fuels, due to structural reasons, results in insufficient boiler output, low thermal efficiency, and unsatisfactory combustion. As a result, the energy consumption is too large, and it cannot even meet production requirements.

[0005] However, some methods of improving the size of the furnace front arch on the basis of existing boilers can achieve certain results, but the effect is not ideal.

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