A Small Diffusion Burner with Multi-channel and Efficient Preheating

Abstract

The invention belongs to the technical field of micro-scale combustion, and particularly discloses a multi-channel efficient preheating small diffusion combustor. The combustor comprises a combustor body, an upper cover plate and a lower cover plate. The combustor body comprises a gas inlet channel, a gas outlet channel and a combustion chamber. The gas inlet channel and the gas outlet channel areboth in a spiral shape and arranged in parallel in a spaced mode for transmitting heat carried by flue gas in the gas outlet channel to fuel gas and the oxidizing agent in the gas inlet channel, thegas inlet channel comprises an upper oxidizing agent channel, a fuel channel and a lower oxidizing agent channel which are sequentially arranged in parallel from top to bottom, and a center baffle plate and a wall face baffle plate are arranged in the gas inlet of the combustion chamber. The channels in the combustor body, the specific position of the combustion chamber and the combustion gas mixing mode are researched and designed, the problems that an existing small combustor cannot performing sufficient mixing and tempering is likely to be generated can be effectively solved, and the combustor has the advantages of being good in mixing effect, wide in stable combustion range, high in combustion efficiency and high in energy utilization rate.

Description

technical field [0001] The invention belongs to the technical field of micro-scale combustion, and more specifically relates to a multi-channel high-efficiency preheating small-scale diffusion burner. Background technique [0002] In recent years, micro-electromechanical devices or systems have developed rapidly, and small devices such as small robots, small rocket engines, small propulsion systems, and portable electronic devices have been continuously developed. At present, these devices are mainly driven by batteries, but batteries have disadvantages such as low energy density, large weight and volume, and long charging time. The energy density of hydrocarbon fuels is dozens of times higher than that of conventional batteries. For example, typical liquid hydrocarbon fuels have energy densities as high as 45MJ / kg, while Zinc / Air batteries, the best current chemistry, have energy densities of only about 1.65MJ / kg. In addition, the burning of hydrocarbon fuels has little e...

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Problems solved by technology

[0006] Aiming at the above defects or improvement needs of the prior art, the present invention provides a multi-channel high-efficiency preheating small-scale diffusion burner, which is carried out by adjusting the specific positions of each channel in the burner body, the combustion chamber and the combustion gas mixing method. Through the research and design, the full preheating and two-stage mixing of gas and oxidant are realized, which can effectively solve the problems of insufficient mixing and easy tempering in existing small burners. It has good mixing effect and stable combustion range. Wide, high combustion efficiency, and high energy utilization, so it is especially suitable for various combustion-based micro-thermal photovoltaic systems and thermoelectric systems, and can also be used directly as a heat source

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