Metal fiber post-mixing type burner and boiler employing same

Abstract

The invention relates to the field of gas burners in the boiler industry, in particular to a metal fiber post-mixing type burner and a gas-fired boiler. The burner comprises a combustion head, a blower and a mixer, wherein a gas-fired swirl device is arranged in the mixer. When the burner is in operation, both fuel gas and air fed into the mixer by the blower flow into the mixer and enter the combustion head for burning after being uniformly mixed by the gas-fired swirl device. The boiler employs the above burner. According to the invention, the part of the burner in a metal fiber post-mixing burning mode, which is arranged outside the boiler, is compact in size; flame on the surfaces of the metal fibers is more uniform; the ignition reliability is improved; and the shaft diameter ratio of the combustion head is increased. The boiler is matched with the burner in a compact shape, so that more than half of the steel material consumption of the boiler is reduced and the occupied area for installation of the matched boiler is reduced by more than a half.

Description

technical field [0001] The invention relates to the field of gas burners in the boiler industry, in particular to a metal fiber post-mix burner and a gas boiler. Background technique [0002] Foreign countries began to study metal fiber burners in the 1980s. The metal fiber burner is a fully premixed blue flame burner, with special metal fibers as the combustion surface, and the maximum combustion intensity can reach 10,000kw / m 2 . This kind of combustion technology is a new type of combustion technology that has been gradually popularized and applied in recent years, and is widely used in different fields abroad. [0003] The metal fiber burner belongs to the premixed gas surface combustion. The pre-mixed uniform gas-air mixture flows to the burner head and burns on the surface layer of metal fiber fabric with uniform air permeability. Combustion is carried out in two ways, both infrared heat radiation and blue flame. The way of infrared heat radiation is that the combu...

AI Technical Summary

Problems solved by technology

The pre-mixing mode needs to be equipped with an explosion-proof speed-regulating fan, and the supporting fan will face extremely high costs and cannot be promoted

The post-mixing combustion mode is currently popular to use the Venturi tube for mixing, which requires a long mixing part, so the shape is also very large, and it cannot reduce the overall volume of the boiler.

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