High-low-pressure and high-low-heat-value dual-fuel-gas ultralow-NOx-and-CO-emission combustor

Abstract

The invention discloses a high-low-pressure and high-low-heat-value dual-fuel-gas ultralow-NOx-and-CO-emission combustor which comprises a cylinder and a bottom plate. A first fuel cavity is fixedly installed on the bottom plate. A plurality of first fuel gas gun pipes are arranged on the first fuel cavity. A circular through hole is formed in the middle of the first fuel cavity. A stable ignitiondevice is welded and fixed to the bottom plate and penetrates through the circular through hole of the first fuel cavity. A second fuel annular pipe is fixedly installed on the outer side of the cylinder and provided with a plurality of connecting pipes. A fixed plate is connected with one ends of the connecting pipes. By arranging brazier bricks of a multi-layer stepped tower type structure on the top, the strong flue gas backflow of flue gas in a hearth is formed, staged combustion of fuel is formed on the brazier bricks through a high-pressure fuel gas gun, the local concentration of flames of the combustor is controlled, and the flame height is reduced; and by arranging a spinning disk on the top of a low-pressure fuel gas gun and arranging an automatic ignition system in the stable ignition device, NOx and CO can be reduced.

Description

technical field [0001] The invention relates to the technical fields of petrochemical, metallurgy and industrial kiln burners, in particular to an ultra-low NOx and CO emission burner with high and low pressure, high and low calorific value dual fuel gas. Background technique [0002] At present, various high pressure, high calorific value fuel gases and various low pressure, low calorific value fuel gases: such as: natural gas, liquefied gas, coke oven gas, blast furnace gas, converter gas, biogas, biomass gas, catalytic dry gas, self-produced dry gas And various self-produced exhaust gases, etc. Most of them are exhaust gases produced by large industrial institutions. The technology for exhaust gas treatment is not very mature. The current burners cannot completely burn various industrial exhaust gases with high and low pressure, high and low calorific value. . [0003] The burner is the core part of the heating furnace. Due to the implementation of the "Petroleum Refinin...

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Problems solved by technology

[0003] The burner is the core part of the heating furnace. Due to the implementation of the "Petroleum Refining Industry Pollutant Emission Standard" (GB 31570-2015) issued by the State Environmental Protection Administration on 2015-07-01, higher requirements are put forward for flue gas emissions. Most of the burners in the heating furnace have been upgraded to low NOx burners, but this kind of low NOx burner has certain limitations on fuel gas, and can only burn fuel gas above 0.02MPa, so it is used in petrochemical, In the metallurgical industry and industrial kilns, a large amount of low-pressure fuel tail gas is emptied and burned through the high-altitude fire column, which wastes energy. At the same time, it is difficult to meet environmental protection requirements by burning low-pressure fuel burners.

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