Gas staged combustion super-low nitrogen oxide emission combustor

Abstract

The invention discloses a gas staged combustion super-low nitrogen oxide emission combustor. The combustor comprises a hearth plate, an igniter and a combustion chamber, wherein the combustion chamber is connected with an air-gas mixer through a pipeline; the air-gas mixer is provided with an air inlet and a first gas inlet; an air flow meter is arranged at the air inlet; a first gas valve block is arranged at the first gas inlet; a second gas inlet is also formed in one side of the combustion chamber; a second gas valve block is arranged at the second gas inlet; the first gas valve block comprises a first gas flow regulating valve; a second gas valve block comprises a second gas flow regulating valve; a signal transmitting end of the air flow meter is connected to the first gas flow regulating valve and the second gas flow regulating valve respectively. According to the combustor, correct proportion of an air-fuel ratio can be realized; thus, the full mixing of the air and the fuel can be guaranteed, and meanwhile graded combustion is performed to realize fuller combustion of the mixed gas and reduce the nitrogen oxide emission.

Description

Technical field [0001] The invention relates to a burner, in particular to a fuel gas staged combustion ultra-low nitrogen oxide burner. Background technique [0002] Existing gas staged combustion ultra-low nitrogen oxide burners generally mix air and gas and send them to the combustion chamber for ignition, and the mixing of air and gas often results in insufficient mixing due to flow direction or mixing time, so gas is generated In general, the ratio of air to gas in the mixed gas of a premixed burner is difficult to control, and external factors such as furnace back pressure, chimney resistance, and suction will also affect combustion, resulting in insufficient combustion and increased nitrogen Oxide emissions. Summary of the invention [0003] In order to solve the above-mentioned defects and deficiencies of the prior art, the present invention provides a method that can ensure that air and gas are fully mixed, and at the same time, the gas flow can be controlled according t...

AI Technical Summary

Problems solved by technology

[0002] Existing gas staged combustion ultra-low nitrogen oxide burners generally send air and gas to the combustion chamber for ignition after mixing, but the mixing of air and gas often results in insufficient mixing due to reasons such as flow direction or mixing time, thus generating gas In addition, it is difficult to control the ratio of air and gas in the mixed gas of general premixed burners, and external factors such as furnace back pressure, chimney resistance, and draft will also affect combustion, resulting in insufficient combustion and increased nitrogen. oxide emissions

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