Abstract: This paper provides a brief introduction to traditional elevated torches and ground torches and analyzes their advantages and disadvantages in detail. It systematically elaborates on the structure and working principles of the open ground torch, as well as the complete set of process systems covering staged combustion system, fuel gas system, nitrogen purging system and smoke suppression steam system. From the actual operation effect, the open ground torch is a good solution to the environmental technical problem of "black smoke" when the torch gas is released in large quantities in a short period of time. Meanwhile, the paper proposes the feasible optimization operation plans for the common problem of high nitrogen content in the flare gas system.

Key words: torch, open ground torches, staged combustion, torch gas, black smoke