Premixing nozzle for part catalytic combustion, nozzle array and combustor

Abstract

The invention discloses a premixing nozzle for part catalytic combustion, a nozzle array and a combustor. The premixing nozzle comprises a middle cylinder, an outer wall cylinder, a net hole plate, a wave cyclone structure and a catalyst coating layer. The wave cyclone structure is positioned in the outer wall cylinder; and fuels and air are mutually mixed before entering the nozzle. The combustion is performed in two areas; the catalytic combustion is performed on a cyclone; and the flame combustion is performed in an outlet of the combustor. The cyclone is a carrier of a catalyst; the drape surface of the cyclone effectively increases the area of a catalyst coating layer; an inclined flow channel on the cyclone can enable a combustion mixture to generate a rotating motion; and a waveform structure of an outlet and flow surrounding cylinders around a middle channel can increase the turbulent degree, improve the flowing uniformly and accelerate the flame propagation speed to reinforce the combustion stability. The premixing nozzle can lower the combustion temperature, realizes stable combustion of harmful gas and low-heat-value gas, reduces generation of such combustion pollutants as nitric oxides and carbon monoxide, and is harmless in harmful gas to the greatest extent.

Description

technical field [0001] The invention relates to the technical field of combustion devices, in particular to a partially catalytic combustion premixed nozzle, nozzle array and burner, which is especially suitable for various industrial and civil burners such as gas turbines, boilers, chemical furnaces, and heating. Background technique [0002] Industrial production such as smelting, petrochemicals, pharmaceuticals, papermaking and mining will produce a large amount of harmful gases and low calorific value gases. These gases will seriously pollute the environment and waste energy if they are directly discharged into the atmosphere. If these gases are burned and utilized, it not only reduces environmental pollution and saves energy. At present, the problem of environmental pollution in our country is very serious, and it is very urgent to develop related clean combustion technologies. In addition, aeroengines, gas turbines for power generation, and gas turbines for ships also...

AI Technical Summary

Problems solved by technology

Burner manufacturers have developed a variety of clean combustion technologies, such as lean premixed combustion technology, dilute-phase premixed pre-evaporation technology, lean oil direct injection technology, etc. Although these technologies can effectively reduce pollutant emissions, they all face the problem of poor combustion. The problem of stability, or the problem of complex structure of the burner, many parts and high cost

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