Can the acidic gas flare be eliminated?
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Can the acidic gas flare be eliminated? Has any factory stopped operating? Or an acidic gas flare is installed, but no situation of discharging acidic gas through a flare has ever occurred?
The acidic gas flare cannot be eliminated; during normal operation of the plant, it results in little emissions. However, during the startup and shutdown of the plant, as well as in cases of sudden shutdowns that result in high emissions, the acidic gas emission flare is the only intrinsically safe solution.
I remember the design institute explaining that hydrocarbon flares and acid gas flares cannot be used interchangeably; this is probably due to the difference in the media involved as well as the difference in materials. Furthermore, all foreign-designed sulfur recovery units that I have come across are equipped with acid gas flare systems.
Discussion and Practice on the Scheme of Not Venting Acidic Gas When the Sulfur Recovery Unit is in Operation, Authors: Guangxi Petrochemical, Wu Jiejiao; Tan Peng; You Shaohui;
Operation of sulfur recovery acid gas system at low load without flaring, authors: Guangxi Petrochemical, Zhang Yuxian, Ma Fei, Wang Wei
In practice, it is completely feasible to eliminate the acidic gas flare, but it is necessary to thoroughly study various regulations and standards to determine whether they are met.
Acid gas flares cannot be eliminated, nor can they be combined with hydrocarbon flares, as their components are different. Acid gas flares typically contain hydrogen sulfide gas, requiring materials such as stainless steel or hydrogen-resistant steel; moreover, a low flow rate is necessary for proper combustion.
SH 3009 \"Code for Design of Flammable Gas Emission Systems in Petrochemical Enterprises\" 4.3.1 d) Gases containing highly toxic substances or corrosive substances (such as acidic gases)； In actual operation, it is required that the permanent light stay lit continuously ； We have not emitted acidic gases during normal production or during start-up and shutdown processes. The perpetual flame consumes a considerable amount of fuel gas. According to calculations, it is advisable to install solenoid valves for automatic ignition: the pressure in the acidic gas network should be 7 kPa, the pressure required to break through the water seal should be 45 kPa, and the perpetual flame should be ignited at a pressure of 20 kPa. Regularly test the ignition system at regular intervals. I wonder if any companies have done this before?