High-speed combustor

Abstract

The invention discloses a high-speed combustor. The high-speed combustor comprises a first combustion chamber at the front end and a second combustion chamber at the rear end. The indoor volume of thesecond combustion chamber is larger than that of the first combustion chamber. The front end of the first combustion chamber communicates with a fuel gas channel with a fuel gas inlet. An air channelwith an air inlet is formed in the outer side of the fuel gas channel. A fuel gas nozzle is arranged at the inner end of the fuel gas channel. The high-speed combustor is simple and compact in structure, small in occupied space and easy to install and maintain. The volumes of the combustion chambers are smaller than the volume of a heating furnace hearth of a common combustor; the volume rate ofcombustion is large and can reach 6*108 kJ / m3*h; and the adjusting range is wide, can reach 1:50 and is easy to automatically adjust, while the adjusting range of the common combustor is only 1:10. Moreover, high-temperature preheated air can be used by the high-speed combustor, so that high combustion temperature can be obtained through low-heating-value fuel gas. The combustion temperatures of the combustion chambers are high and close to 2000 DEG C, so that the high-speed combustor can be applied to most industrial furnaces.

Description

technical field [0001] The invention relates to the technical field of industrial burners, in particular to a high-speed burner. Background technique [0002] High velocity burners are mainly used in industrial furnaces. Ordinary industrial furnaces have a spacious furnace for heating materials and ensuring complete combustion of fuel. In this way, it takes a long time to heat the furnace to the operating temperature when the furnace is turned on, and when the furnace is stopped, due to the large thermal inertia, there is still a considerable period of time to continue heating the workpiece, making it difficult to control the heating temperature and easily causing overheating of the workpiece. In order to prevent the workpiece from overheating, ordinary heating furnaces have to operate at a temperature slightly higher than the allowable maximum heating temperature of the workpiece, which reduces the heating speed and increases the heating time, especially when the workpiece...

AI Technical Summary

Problems solved by technology

[0005] However, the flue gas emission velocity of the high-speed burner in the domestic prior art is a high subsonic speed (200-300m / s), and the high-speed burner that can exceed this speed and reach supersonic speed is rarely used, and the present invention provides a The solution that the high-temperature flue gas ejection speed can reach supersonic speed (above 340m / s), provides higher heat exchange efficiency than existing products, shortens the heating time, and realizes flameless combustion in the combustion chamber

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