Micro-scale premixing staged combustor

Abstract

The invention provides a micro-scale premixing staged combustor. The micro-scale premixing staged combustor comprises a plurality of micro-scale premixing nozzles, a main fuel distribution cavity, an on-duty fuel distribution cavity, a main combustion air distribution cavity, a combustor top cover, a nozzle distribution plate, an air distribution plate, a flame tube, a cartridge receiver and an electric igniter. Fuel enters the micro-scale premixing nozzles through nozzle fuel inlets, then is jetted into air distribution holes from nozzle fuel outlets, is premixed with countercurrent main combustion air from the air cavity in the air distribution holes in an internal cross jet mode and then enters the flame tube to be combusted, and smoke is generated. According to the micro-scale premixing staged combustor, a technical route of a nozzle circumferential matrix distribution form, main combustion stage/on-duty stage nozzle radial classification and internal cross jet premixing of fuel and an oxidizing agent under a micro-scale condition is adopted, so that the premixing degree of the fuel and the oxidizing agent is improved, the premixing time and distance of the fuel and the oxidizing agent and the residence time of flue gas in a high-temperature area are reduced, and therefore near-zero emission of NOx is realized.

Description

technical field [0001] The invention belongs to the technical field of high-efficiency and clean combustion, and in particular relates to a micro-scale premixed staged burner. Background technique [0002] In order to achieve "carbon peaking and carbon neutrality" as soon as possible, burners such as gas turbine combustors, boilers and kilns need to burn hydrogen-doped (or pure hydrogen) fuel. Because hydrogen has the characteristics of fast flame propagation speed and strong mass transfer and diffusion ability, hydrogen-doped (or pure hydrogen) fuels face the problems of poor flame stability and high NOx emissions on traditional burners. With the increasingly stringent pollutant emission requirements, traditional burners can no longer meet the pollutant emission and flame stability requirements under high temperature and high pressure operating conditions. Therefore, it is necessary to design a new type of burner to solve the above problems. Contents of the invention [...

AI Technical Summary

Problems solved by technology

Because hydrogen has the characteristics of fast flame propagation and strong mass transfer and diffusion capabilities, hydrogen-doped (or pure hydrogen) fuels face the problems of poor flame stability and high NOx emissions on traditional burners

With the increasingly stringent pollutant emission requirements, traditional burners can no longer meet the pollutant emission and flame stability requirements under high temperature and high pressure operating conditions, so it is necessary to design a new type of burner to solve the above problems

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