Bottom-mounted type NOx discharging circular flame gas burner

Abstract

The invention relates to a bottom-mounted type NOx discharging circular flame gas burner which comprises a cylinder part, a combustion air butterfly valve pipeline, a brazier brick part, an incandescent light and a gas supply system. The brazier brick part comprises an inner brazier brick and an outer brazier brick. An annular air channel is arranged between the two brazier bricks. Air channels are arranged at the center of the inner brazier brick. The combustion air butterfly valve pipeline is communicated with the inner portion of the cylinder part. Combustion air is guided into the annular air channel and the center air channels for burning respectively. The gas supply system comprises a plurality of gas nozzles. Each gas nozzle is provided with a first fuel spraying opening, a second fuel spraying opening and a third fuel spraying opening. Combustion air entering the air channels and fuel sprayed out by the gas nozzles are mixed to form oxygen deficient overrich burning, oxygen deficient overrich re-burning, oxygen enrichment over-diluted burning and smoke re-burning. Air staging feeding, gas three-level feeding and mixed multilevel burning are achieved, NOx generating is effectively restrained, and low NOx emission is achieved.

Description

technical field [0001] The invention relates to a petrochemical heating furnace burner device, in particular to a bottom-mounted low-NOx emission circular flame gas burner meeting the requirements of bottom-fired, circular flame, and gas fuel. Background technique [0002] In order to cope with the ever-increasing emission requirements and urgent situation of national environmental protection, most of the low NOx emission combustion technologies for domestic petrochemical heating furnace burners can only guarantee about 50PPM NOx emission. Various burners have developed a variety of structures around the control of NOx emissions, and technologies such as fuel staged combustion, rich-lean combustion, fuel reburning, and flue gas recirculation have been continuously applied. However, subject to the structural characteristics of the heating furnace, the combustion Due to the limited structural space of the device, it is impossible to apply multiple measures at the same time to...

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Problems solved by technology

Various burners have developed a variety of structures around the control of NOx emissions, and technologies such as fuel staged combustion, rich-lean combustion, fuel reburning, and flue gas recirculation have been continuously applied. However, subject to the structural characteristics of the heating furnace, the combustion The structural space of the device is limited, and it is impossible to apply multiple measures at the same time to suppress the formation of NOx in an all-round way during the combustion process, thus limiting the further development of low-NOx emission combustion technology

[0003] Some of the burner products using low NOx combustion technology used in the market have poor flame rigidity, fluttering, flame licking the furnace tube, and even unsafe phenomena such as secondary combustion and flash explosion in the heating furnace.

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