METHOD AND DEVICE (BURNER) FOR COMBUSTION OF LOW-CALORIC GASEOUS FUEL Russian patent published in 2025 - IPC F23D14/60 

FIELD: combustion processes.

SUBSTANCE: invention relates to power engineering, namely it is intended for combustion of low-caloric gaseous fuel. Low-caloric gaseous fuel combustion method includes the low-caloric gaseous fuel flow supply into the device annular channel with its subsequent combustion, at the annular channel inlet the gas flow is twisted clockwise, wherein the outer and inner shells forming the annular channel have a plurality of perforations in its outlet part with a controlled total area of the perforations flow passages differentially for each of the shells, wherein ignition is performed on that part of the stream that enters the furnace space through the perforations of the outer shell, since this part of the stream is more enriched with hydrocarbon components, which is a result of the vortex movement of the gaseous fuel along the annular channel, and the gas flow entering the combustion space through the perforations in the inner shell is not subjected to the flame high-temperature action and is discharged through the chimney, at that, at the annular channel outlet section, the flow rate of both the hydrocarbon-depleted and enriched fuel is controlled by adjusting the flow passage areas for each of the streams, wherein entering the annular channel edge gas is ignited by the gas combustion flame entering through the perforations in the outer shell, and for the burner ignition during the low-caloric gas combustion, a high-calorific gas is supplied into the annular channel when the burner is started, and as the establishment of stable combustion at the inlet of the annular channel, the supply of low-caloric gas increases and, accordingly, the supply of high-caloric gas decreases, wherein combustion stability is ensured by varying total areas of perforations in outer and inner shells of annular channel and ratio of areas of annular sections at outlet of annular channel, at that, the burner device optimum parameters are selected experimentally, and the air flow to the combustion zone is supplied from the furnace space.

EFFECT: invention allows improving fuel combustion quality.

2 cl, 1 dwg