Biomass gas three-level swirling flow air distribution low-nitrogen burner

Abstract

The invention discloses a biomass gas three-level swirling flow air distribution low-nitrogen burner. The burner comprises a biconical burner port; a tertiary air tangential blade is fixedly welded to a throat ring interlayer of the biconical burner port; a tertiary air bellow is fixedly connected to the bottom of the biconical burner port; the biconical burner port is fixedly connected with the top of a secondary air outer sleeve steel pipe through a flange and bolts; the bottom of the secondary air outer sleeve steel pipe is welded to the top of a primary air bellow and the top of a secondary air bellow; and a secondary air heat resistance inner sleeve steel pipe is welded to the inner side of the secondary air outer sleeve steel pipe. According to the biomass gas three-level swirling flow air distribution low-nitrogen burner, through a three-time classified swirling flow air distribution and combustible gas effective combining combustion mode, and matching of the biconical burner port, the primary air bellow and the secondary air bellow, the effect that the mixing ratio of air to combustible gas is increased, so that combustion is more sufficient is achieved, and meanwhile, low nitrogen discharge can be realized, and the low-nitrogen efficient combustion effect is really achieved.

Description

technical field [0001] The invention relates to the technical field of gas combustion air distribution, in particular to a biomass gas three-stage swirling air distribution low-nitrogen burner. Background technique [0002] Biomass gas three-stage swirling air distribution low-nitrogen burner is a burner that can effectively organize combustion and reduce nitrogen oxides through air-graded supply of combustible gas. It controls the combustion method in which the excess air ratio in the combustion zone is lower than the stoichiometric ratio, and feeds the total amount of combustion air (a>1. a is the excess air coefficient) in batches along the main flow direction of the entire combustion zone to form " Class III" combustion zone. When a<1 in the primary air distribution, the amount of combustion air is less than the theoretical air amount, resulting in an oxygen-deficient state and the formation of "fuel-rich" combustion, thereby reducing the amount of combustion heat...

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Problems solved by technology

[0004] Aiming at the deficiencies of the prior art, the present invention provides a biomass gas three-stage swirling air distribution low-nitrogen burner, which has the advantages of sufficient mixing of air and combustible gas, high combustion efficiency, and reduced nitrogen oxide emissions, and solves the problem of air Insufficient mixing with combustible gas, low combustion efficiency, and large nitrogen oxide emissions can truly achieve the goal of energy saving and emission reduction

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