Sulfur recovery
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Current industrial recycling methods include: Claus sulfur recovery method, super Claus method, Scott method, etc. Among them, the Claus sulfur recovery method is widely used. 1. Claus Sulfur Recovery First, one-third of the H2S and O2 fuel in the combustion furnace generate SO2: H2S+3/2O2=SO2+H2O+Q ； Secondly, the remaining H2S and the generated SO2 undergo a Claus reaction under the action of a catalyst to generate sulfur: 2H2S+SO2=3S+2H2O+Q. The operating temperature of the combustion furnace is 1200-1250°C, and the Claus reaction temperature is 200-350°C. The operating pressure (absolute) is generally 0.11-0.2MPa. 2. Scotus This method converts the residual sulfide in the Claus tail gas into hydrogen sulfide, and then uses diisopropanolamine as the absorbent to absorb it. The final tail gas is burned and discharged into the atmosphere. The concentration of H2S released during absorbent regeneration can reach 10%-20%, and then returns to the Claus system.
The operating pressure (absolute) is generally 0.11-0.2MPa?? The operating pressure in our workshop is generally 20--50kpa. If it reaches 0.1mpa, it is considered an accident.
How is the effect of using diisopropanolamine as absorbent compared to MDEA?
It must be without MDEA. First of all, MDEA has a good effect on absorbing H2S.
What the poster mentioned is absolute pressure. Gauge pressure is 10-20KPa, which is normal.