Burner with operated flame length on natural gas is developed. Flame length is changed by movable gas distribution valve. Depending on valve overlap gas nozzle flame length is changed from 5 up to 25 m. Stable operation provides with four stabilizers in the form of high-drag established in nozzle part of burner.
Energotechnological and economical data
Burner application at the tubular rotating furnace allow to reduce excess air coefficient up to 1,05–1,1; to decrease furnace outlet temperature at 100–200°С; adduced to a = 1,0 Nх emission after furnace is no more than 225 mg/m3, СО up to 0,05 %. Equivalent fuel discharge intensity is decreased at 10-20% depending on feedstock and operating regime.
Development cost is 20 $thousands, pay-back period up to 2 years.