Eco-friendly burner with ultra-low NOx emissions

Abstract

The invention relates to an environment-friendly burner with ultra-low nitrogen oxide emission, which comprises: an air distribution body, a swirl mixer and a fire stabilizing tube connected sequentially from left to right; the swirl mixer is radially distributed in sequence from the center to the outside It is equipped with a central pipe, a partition cylinder, a second spacer sleeve, a first spacer sleeve and an outer shell. The swirl mixer also includes a primary air pipe and a secondary air pipe; the outer ring cavity is connected with the primary gas inlet pipe, and the inner ring cavity is connected with the The secondary gas inlet pipe is connected; one end of the primary air pipe is connected with the outer ring cavity, and the primary air pipe is respectively connected with the primary passage and the central pipe, one end of the secondary air pipe is connected with the inner ring cavity, and the other end of the secondary air pipe is connected with the inner ring cavity. Extending inward, and the secondary air pipe is connected with the secondary channel; there is an air channel in the air distribution body, and the air channel is respectively connected with the central pipe, the primary channel and the secondary channel; After being mixed separately in the secondary channel, they are mixed, burned and sprayed out through the fire-stabilizing tube.

Description

technical field

[0001] The invention relates to the technical field of burners, in particular to an environment-friendly burner with ultra-low nitrogen oxide emission. Background technique

[0002] At present, with the continuous strengthening of environmental protection by the national and local governments, many parts of the country have successively formulated the same local standards as the DB11 139-2015 boiler air pollutant emission standards implemented in Beijing and Shanghai, namely nitrogen oxide emissions. It is required to be below 30 mg. At present, most of the boiler emissions are generated by burner combustion, and it is difficult to achieve the target requirement of less than 30 mg simply by the burner system (except for full premixed burners). Circulation technology can finally make nitrogen oxide emissions meet the standard requirements. The technical route of low nitrogen burner + FGR is the mainstream technical route in the field of low nitrogen combustio...

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