Torch design
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May I ask whether the exhaust gases from different devices can be combined in one main pipe before being sent to the flare? If that doesn’t work, is there a regulatory basis for it? Thank you
No! The design principle for torches is: \"separate quality and pressure.\" The so-called \"separation by quality\" refers to the fact that different gas components in the exhaust gases are sent through separate channels; for example, acidic gases, ammonia-containing gases, and hydrocarbon gases. If they are emitted together, reactions can occur, leading to crystallization that blocks the pipes. The so-called \"pressure separation\" refers to the fact that gases at different discharge pressures flow through separate channels, with high-pressure gases being strictly prevented from entering low-pressure pipelines. Specific standards that can be studied include: SH3009 Code for Design of Flammable Gas Emission Systems in Petrochemical Industries, and API STD 521 Pressure-Relieving and Depressuring Systems
SH 3009-2013 Code for Design of Flammable Gas Emission Systems in Petrochemical Industries https://bbs.hcbbs.com/thread-2840228-1-1.html (Source: Hua Hai Chuan Liu – Haichuan Petrochemical Forum Website)
I agree with the opinion from the second floor: gases with different chemical properties, calorific values, and vent pressures need to be analyzed in detail before determining whether they can be discharged into the respective vent systems. Generally, there are systems for low pressure, high pressure, acidic gases, etc. Each is independently set up.