Operation summary of 200×10³ t/a sulfur recovery unit

This paper summaried the occurred problems of Tianjin petrochemical 200×10³ t/a sulfur recovery unit since its star-up. The result shows that the lower load start-up and the fluctuation of sour gas, etc. appeared in the operating process of large-scale sulfur recovery unit, especially at the initial stage of the unit operation. To ensure the unit smooth running, the precise regulation of the ratio of sour gas and air, and the optimizing operation of the amine regeneration unit etc. can obviously reduce the interference of the operation fluctuation. Otherwise, by the research on the various processing parameters and the qualities of products, it can be seen that the contents of COS and SO₂ in the outlet of the reactor were quite low (almost unmeasured) during the operation fluctuation, the pH value of cold water was above 8, and the waste gas emission ρ (SO₂) was between 100 mg/m³ and 300 mg/m³, which indicate that the catalyst CT6-5B has high anti-interference performance and activity.