Reference standard: HG/T 20570.12-95 Flare System Settings P12 (406)
According to the formula Calculate among Is the lower explosion limit parameter of flame gas, without unit; C l Is the lower explosion limit of flare gas in air, without unit; U j Is the outlet velocity of flare gas, m/s; U x Is the design wind speed, m/s; M j Is the average molecular weight of flare gas, without unit; M x Is the average molecular weight of air, which can be 29, without unit; For Brutowski/Sommer approximation | 
