Low-nitrogen burner

Abstract

The invention discloses a low-nitrogen burner. According to the technical scheme, the low-nitrogen burner is characterized in that a mixer of the low-nitrogen burner comprises a barrel and a gas inlet, wherein an inner barrel and burning-supporting air swirling pieces arranged on the inner wall of the inner barrel are arranged at the gas inlet front end inside the barrel; an air inlet barrel located on the back side of the burning-supporting air swirling pieces in the air inlet direction is arranged at one end, close to the gas inlet back side, of the inner barrel; the air inlet barrel, the inner barrel and the inner wall of the barrel are connected in a sealed manner to form a gas sub-cavity; inclined flow guiding holes are formed in the air inlet barrel; a primary swirling impeller is arranged in the position, located on the air inlet back side of the inner barrel, inside the barrel; and the primary swirling impeller and the air inlet barrel form a primary mixing chamber. Through the arrangement, gas is ejected via the gas sub-cavity from the inclined flow guiding holes, the ejected gas can form multiple single, short and powerful gas flows, air flows sent by a fan pass through the burning-supporting air swirling pieces to form short and powerful rotating air flows, and the rotating air flows are circular and impact the multiple single gas flows, so that the air and the gas of the primary mixed gas reach the air-fuel ratio in the complete burning theory.

Description

technical field [0001] The invention relates to the field of gas fuel burners, in particular to a low-nitrogen burner. Background technique [0002] At present, the Chinese patent publication No. 102913909A discloses a metal fiber post-mixing burner, which includes a combustion head, a fan and a mixer; the mixer is provided with a gas inlet; the gas swirl device includes at least two swirls Flow sheet, the swirl sheet is stretched by a hollow ring, the diameter of the hollow part of the swirl sheet is smaller than the diameter of the combustion head, and one of the swirl sheets is arranged obliquely close to the gas inlet, and the It is the leeward side of the fan supply air, so that the gas and air in the mixer form a swirl and fully mix; when working, the gas and the air sent into the mixer by the fan flow into the mixer, and pass through the gas swirl device After full mixing, this gas swirl device only passes the gas at the gas inlet through the swirl plate as a guide f...

AI Technical Summary

Problems solved by technology

[0002] At present, the Chinese patent publication No. 102913909A discloses a metal fiber post-mixing burner, which includes a combustion head, a fan and a mixer; the mixer is provided with a gas inlet; the gas swirl device includes at least two swirls Flow sheet, the swirl sheet is stretched by a hollow ring, the diameter of the hollow part of the swirl sheet is smaller than the diameter of the combustion head, and one of the swirl sheets is arranged obliquely close to the gas inlet, and the It is the leeward side of the fan supply air, so that the gas and air in the mixer form a swirl and fully mix; when working, the gas and the air sent into the mixer by the fan flow into the mixer, and pass through the gas swirl device After fully mixing, this gas swirl device only passes the gas at the gas inlet through the swirl plate as a guide for mixing. The whole process has only one mixing process, and the mixing effect is not optimal, resulting in the inability to mix to achieve the theoretical air-fuel ratio of complete combustion.

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