Fuel gas combustion device with ultra-low NOx emission amount and fuel gas distribution method

Abstract

The invention relates to a fuel gas combustion device with ultra-low NOx emission amount and a fuel gas distribution method, aims at enabling NOx emission amount to be smaller than 20ppm and meeting the low-emission requirement of a high-power combustor and belongs to the technical field of industrial boilers. The fuel gas combustion device with the ultra-low NOx emission amount is characterized in that a central barrel, a swirler, an inner throat and an outer throat are sequentially and coaxially arranged along the central axis of the combustion device outward, a first combustion air channel is arranged between the inner throat and the outer throat, a second combustion air channel is arranged between the inner side of the inner throat and the outer side of the central barrel, and a plurality of T-shaped fuel gas guns and a plurality of oblique-mouth fuel gas guns are arranged, staggered and evenly distributed in an equal-diameter mode. The fuel gas combustion device with the ultra-low NOx emission amount and the fuel gas distribution method have the advantages that fuel gas holes of the oblique-mouth fuel gas guns are outward, flame is formed in the first combustion air channel on the outer side of flame of the T-shaped fuel gas guns, accordingly a boiler furnace space is utilized to the most extent, the amount of produced NOx is little and is smaller than 20ppm, no CO is produced, and combustion is stable and reliable. The maximum power of one machine can reach to more than 70MW.

Description

technical field [0001] The invention relates to a gas combustion device and a gas configuration method, in particular to a gas combustion device and a gas configuration method with an ultra-low NOx emission of less than 20 ppm, and belongs to the technical field of industrial boilers. Background technique [0002] With the deepening of national energy conservation and emission reduction policies, the NOx emissions of major cities are no longer satisfied with the national standard of 100ppm. As early as 2008, Beijing and other cities have required NOx emissions to be less than 50ppm. Afterwards, Tianjin, Urumqi and some gas heating companies have The low emission requirements of high-power burners have been put forward one after another, and the gas-fired boilers in power plants are mostly required to emit less than 40ppm. However, so far in the international market, for advanced burners with NOx emissions less than 50ppm, flue gas recirculation measures are often adopted, th...

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Problems solved by technology

However, this method will inevitably increase the power and power consumption of the blower. It is just to demolish the east wall to make up for the west wall. At the same time, this method also increases the instability of combustion, which is easy to cause surge and has great safety hazards.

Shanghai Nuote Feibo Combustion Equipment Co., Ltd. is an invention patent named "A Low-NOx Burner with Flue Gas Backflow Homogeneous Combustion and Its Gas Configuration Method" and the patent number is 201010582069.1. It uses a T-shaped back spray gun to partially premix gas and air , so that the gas burns evenly, and the NOx emission is less than 40ppm, but for high-power gas combustion devices, whether it can achieve lower emission standards remains to be further studied

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