Fives’ Pillard SULFLAM® Claus burner is designed to mix combustion gases in the post-flame zone of a sulfur recovery unit (SRU), at high temperature. This is vital for an efficient Claus reaction within the furnace (2H2S + SO2 ->2 H2O + 3/2 S2).
Each Pillard SULFLAM® burner is tailor-engineered through in-house computational fluid dynamics (CFD) modeling. This ensures optimal performance, according to each unique SRU’s process characteristics. The burner is available in axial and tangential ﬁring conﬁgurations, adaptable to any kind of combustion chamber.
Pillard SULFLAM® ensures excellent flame stability in high excess air conditions during cold start-up and refractory dry-out phases. It is designed with a double stream acid gas tip to enable a two-stage mix and a double impulse, matching the different phases of the kinetic reaction in the Claus furnace.
• High-intensity, compact ﬂames
• Excellent mixing
• High ﬂame stability, even with a lean acid gas stream and during the cold start-up and refractory dry-out phases, under high excess air conditions
• High turndown ratio with low acid gas pressure
• Efﬁcient processing with very lean acid gas, using conventional Claus and associated tail gas units
The Pillard SULFLAM® burner has a very specific design for co-firing fuel gas. This is essential for increasing the flame temperature when operating with hydrogen sulfide (H2S) lean acid gas. The fuel gas is added peripherally and injected into the combustion air, where it is burned with the required amount of excess air. The remaining air can then be used in the Claus reaction.
This configuration efficiently burns off fuel gas, reducing the risk of unburnt hydrocarbons, soot formation, and increased carbon disulfide (CS2) and carbonyl sulfide (COS).
When combined with a properly engineered thermal reactor furnace, the Pillard SULFLAM® burner offers:
• High sulfur quality
• Increased disulfur (S2) conversion efﬁciency
• Reduced downstream pollutant levels (e.g. BTX)
• Better catalyst lifetime when using a co-ﬁring technique
• An improved refractory lifetime
Pillard SULFLAM® is available in axial and tangential firing configurations. The burner can easily be retrofitted in existing SRUs to improve S2 conversion efficiency, sulfur quality and the refractory lifetime of the Claus unit.
It is available for a range of Claus units, from 5 to 1,000 TPD.
Past clients include:
ADGAS (UAE): 500 TPD
Retrofit of an existing burner, including refractory supply
Using very lean acid gas (26.5% H2S)
Excellent sulfur quality
Total Lacq (France): 600 TPD
Almost 100% BTX destruction using a staged co-firing technique
No soot formation
Excellent sulfur quality
Five years’ continuous operation without incidents
Lukoil (Russia): 10.5 TPD
Presence of unsaturated hydrocarbons in the feedstock
Using very lean acid gas (28% H2S) without requiring oxygen enrichment or acid gas enrichment
BTX destruction using a staged co-firing technique with minimum fuel gas flow, by preheating the fuel and acid gases
Cold climate: -35°C (-31°F)
Bright yellow sulfur, with no signs of carbon contamination