A high-temperature heat source for high-efficiency preheating of small non-premixed burners

Abstract

The invention belongs to the technical field related to power heat sources, and discloses a high-efficiency preheating small-scale non-pre-combustor high-temperature heat source, including: an oxidant preheating channel, a shell set outside the oxidant preheating channel, and a central baffle, wherein : The oxidant preheating channel includes a hollow preheating channel and a burner arranged at one end of the hollow preheating channel, and the hollow preheating channel is used for inputting oxidant; the shell includes a shell and a baffle at the end of the shell, There is an opening in the center of the baffle, which is used to input fuel. The hollow preheating channel has one end of the burner and the gap between the baffle. The hollow preheating channel and the shell form the combustion chamber; the central baffle is set on the opening. center and fit with the opening clearance. The application can not only realize the preheating of the oxidant but also realize the effective output of the heat source. At the same time, the reverse flow of the oxidant and the fuel increases the disturbance to realize rapid and uniform mixing, which facilitates rapid combustion and meets the requirements of the power heat source.

Description

technical field [0001] The invention belongs to the technical field related to power heat sources, and more specifically relates to a high-efficiency preheating small non-pre-combustor high-temperature heat source. Background technique [0002] The rapid development of micro-nano precision machining technology has led to the emergence of various small power devices or systems, such as small robots, small drones, small reconnaissance aircraft, and small propellers. At present, most of these power devices are driven by traditional batteries. However, traditional batteries There are disadvantages such as low energy density, large weight and volume, and long charging time, while the energy density of power sources based on hydrogen and hydrocarbon fuel combustion is dozens of times higher than that of traditional batteries. Therefore, small-scale power sources based on small-scale combustion have the potential to replace conventional batteries. Among them, small burners are the...

AI Technical Summary

Problems solved by technology

[0003] Chinese patent CN110195862B discloses a separate preheating small-scale diffusion burner, the oxidant passes through the first J-shaped preheating channel and the second J-shaped preheating channel, mixes with the fuel in the center and burns in the middle part and cannot go outward The effective output of heat cannot meet the needs of high heat conditions, and the patented oxidant and fuel are mixed in parallel, and a splitter plate must be installed to achieve good mixing. The structure is complex and it is difficult to small-scale integration

Chinese patent CN110553259B discloses a micro-sized non-premixed burner suitable for thermal power generation. The oxidant and fuel are arranged in a downstream direction and the mixing property is not good. At the same time, the preheating of the oxidant cannot be realized, and the ignition is difficult, the combustion is slow, and the reaction is slow.

In addition, in order to realize the function as a power source, it is necessary to improve the anchoring performance of small-scale flames. Due to the difference in air intake volume and air intake speed under different working conditions, the residence position of the flame is easy to change, and it is easy to cause abnormalities such as oscillating flames. Stable flame shape, poor flame stability

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