A Small Diffusion Burner with Separate Preheating

Abstract

The invention belongs to the technical field of micro-dimension combustion, and particularly discloses a separated type preheating small diffusion combustor. The combustor comprises a combustor body.The combustor body comprises a fuel channel, a combustion chamber and a flue gas outlet which are sequentially communicated and share the center line. A first J-shaped preheating channel and a secondJ-shaped preheating channel are symmetrically arranged at the outer side wall of the combustion chamber, a spreader plate is arranged at a gas inlet of the combustion chamber, and a flow baffle is arranged at the side, away from the fuel channel, of the spreader plate for performing second-time flow division on fuel gas introduced through the fuel channel to achieve secondary mixing of fuel gas and an oxidizing agent. The oxidizing agent can be sufficiently preheated, two-time flow dividing and three-level mixing can be achieved, the problems that the flame stability is poor, the combustion efficiency is low, tempering easily happens, and the structure is complex can be effectively solved, and the combustor has the advantages of being simple in structure, good in mixing effect, wide in combustion range, high in combustion efficiency, safe and reliable.

Description

technical field [0001] The invention belongs to the technical field of micro-scale combustion, and more specifically relates to a separate preheating small-scale diffusion burner. Background technique [0002] The rapid development of MEMS technology has led to the emergence of many small power devices or systems, such as small detectors, small robots, small satellites and small propulsion systems. At present, most of these devices are driven by batteries. However, batteries have disadvantages such as low energy density, large weight and volume, and long charging time. The energy density of hydrogen and hydrocarbon fuels is dozens of times higher than that of traditional batteries. Therefore, combustion-based compact power plants have great potential to replace conventional batteries. Researchers at home and abroad have successfully manufactured small gas turbines, small rotary engines, small rockets and small array propulsion systems, etc. Among them, the burner is a key ...

AI Technical Summary

Problems solved by technology

[0007] In view of the above defects or improvement needs of the prior art, the present invention provides a separate preheating small diffusion burner, which combines the characteristics of the small diffusion burner itself and its combustion premixing and safety process features, and its key Components such as preheating channels, combustion chambers, premixing structures and their specific setting methods are studied and designed, and correspondingly two splits and three stages of mixing can be realized, which can effectively solve the problems of poor flame stability, low combustion efficiency, and easy flashback , complex structure and other issues, but also has the characteristics of simple structure, good mixing effect, wide flammable range, high combustion efficiency, safety and reliability, so it is especially suitable for providing power or heat source for small power or heating equipment

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