Incinerators
Sulfur Recovery Units (SRU’s)
Description
A SRU incinerator is an oxidation-reduction reactor for the recovery of elemental Sulphur from H2S rich waste gases. The first stage of the so called Claus process, is the complete free flame oxidisation of typically 1/3 of the H2S to SO2 in a reaction furnace (H2S + 1½ O SO2 + H2O). The SO2 and the then remaining H2S undergo the Claus reaction both in the reaction furnace and in a series of catalytic reactors (2 H2S + SO2 3S + 2 H2O) resulting in the overall chemical reaction H2S + ½ O H2 + S. Key Features One combustion chamber with mixing wall Part of the waste containing H2S is injected through the burner, the remainder before the mixing wall. The burner is a robust Multifuel design suitable for the combined combustion of different waste gas and gaseous or liquid support fuel streams. The mixing wall ensure the waste and combustion gases combine and also ensures a uniform temperature profile to improve the overall efficiency of the reaction. Key Advantages - Sulphur recovery – Ultra-low NOx combustion possible – Complete oxidisation of all hydrocarbons – No CO formation – Complete odour destruction – Destruction efficiency over 99.99% – For waste air/gas streams containing a high percentage of H2S
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