However, environmental regulations continue to tighten, putting growing pressure on Claus sulphur recovery processes and this step can become a bottleneck within the refinery.
Boosting efficiency
You can overcome this problem by enriching the combustion air in a Claus plant with oxygen. This increases the capacity significantly. Our innovative burner technology ensures excellent mixing of hydrogen sulphide and oxygen-enriched air over a wide load range.
Benefits of oxygen enrichment
• Increased Claus plant capacity at low revamp capital cost
• Increased productivity without changing the pressure drop
• More effective treatment of feeds containing ammonia
• Greater flexibility in handling feed gas composition variations
• Less effort for tail-gas purification (reduced nitrogen flow)
• Ease of installation with minimum disruption to plant operation.
Oxygen Enrichment Levels
Low level enrichment |
Single combustion |
Double combustion |
|
---|---|---|---|
Add Oxygen | To existing air blower discharge |
Through burner modification | Use of second reaction furnace |
Enrichment | Up to 28% oxygen | Up to 45% O2 (type of burner)* |
100% oxygen |
Limiting factor | Burner metallurgy | Reaction furnace temperature | Bypasses temperature limits |
Capacity increase | 20-30% | 75% | 150% |
Equipment requirements | Oxygen injector | Change air burner to oxygen burner |
Add 2nd reaction furnace and waste heat boiler |
Products | OXYMIX™ FLOWTRAIN® |
SURE™ Oxygen burner | SURE™ Double combustion |
Find out more about BOC SURE™ Technology
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