| 摘要 |
<p>In a system for burning waste gas including a vertical flare stack, a pilot burner having a continuous flame nozzle in close proximity to the discharge outlet of the stack and an elongated tube connecting the nozzle with a supply of combustible air/gas mixture at or near ground level, and a flame retention burner having a flame retention nozzle in close proximity to said continuous flame nozzle to a supply of combustible gas at or near ground level, a method for igniting the waste gas which is discharged from the stack comprising the steps: flowing a combustible gas through the flame retention burner; flowing a combustible air/gas mixture through the pilot burner; igniting the air/gas mixture within the elongated tube of the pilot burner at a point near ground level thereby causing the flame front to travel up the pilot burner tube to the continuous flame nozzle and igniting the combustible gas flowing from the flame retention nozzle; purging the spent air/gas mixture from the pilot burner by flowing combustible air/gas mixture therethrough until same is ignited by the flame produced at the flame retention nozzle, and; subsequently discontinuing the flow of gas through the flame retention burner to extinguish the flame at the flame retention nozzle.</p> |
