Variable-section cyclone burner

Abstract

The invention discloses a variable-section cyclone burner, which comprises a central air duct. A primary air pipe is sleeved outside the central air duct, a partition sleeve is sleeved at an outlet of the primary air pipe and divides the primary air pipe into an inner space and an outer space, an annular sliding stopper is mounted on the central air duct, and the annular sliding stopper is connected with a pull rod arranged on the outside of the cyclone burner. As the primary air is divided into inner primary air and outer primary air by the partition sleeve additionally mounted at the outlet of the primary air pipe of the cyclone burner and the annular sliding stopper is mounted on the central air duct, when the annular sliding stopper is pulled backwards, the inner primary air and the outer primary air ventilate simultaneously, ventilation area is expanded, primary air speed is reduced, and the requirement for reducing air speed is met; and further, when the annular sliding stopper is pushed forwards, a passage of the inner primary air is blocked, only a passage of the outer primary air ventilates, ventilation area is reduced, and accordingly primary air speed is increased.

Description

technical field [0001] The invention relates to a power plant boiler burner, in particular to a swirl burner with variable section. Background technique [0002] At present, the coal quality of power plant boilers is variable. When the ignition performance of the fuel changes greatly, it will have a great impact on the combustion stability or the safety of the burner. One of the measures to solve this problem is to adjust the outlet of the burner. Primary wind (air powder mixture) speed. When the coal quality is easy to catch fire, increase the primary wind speed to keep the ignition point away from the burner nozzle to ensure the safety of the burner; when the coal quality is not easy to catch fire, reduce the primary wind speed to make the fire stable. Existing burners all use a fixed outlet section, so it is impossible to adjust the primary air velocity by adjusting the primary air outlet section area, so the adaptability is poor in the case of large changes in coal type...

AI Technical Summary

Problems solved by technology

Existing burners all adopt fixed outlet section, so it is impossible to adjust the primary air velocity by adjusting the primary air outlet cross-sectional area, so the adaptability is poor in the case of large changes in coal types

Images