Enersul's patented HySpec Degassing Process uses a gas-liquid contractor which utilizes a series of small reactors and a select catalyst to reduce the H2S content of liquid sulphur to less than 5 ppm in a matter of minutes. The end result is improved formed product friability and increased solid sulphur strength.
The Hyspec degassing plant consists of a compact skid on which the reactors and associated equipment are mounted. The number of reactors will depend primarily on the liquid sulphur flow rate and initial H2S concentration. The skid can be installed with minor tie-ins and minimal disruption to ongoing operations. As the skid is modular, additional reactors can be installed easily should degassing requirements change.
Incoming sulphur is pumped into the first reactor and is cascaded through each of the subsequent reactors. The appropriate amount of catalyst is injected into the first and/or second reactor and the last reactor is used to purge the catalyst from the liquid sulphur. Inside each reactor is an impeller shroud assembly, essentially a pump that draws the ambient air and liquid sulphur together within the shroud. The high shear rates and intense profusion of bubbles generated by the impeller causes intimate contact and throughout mixing of the air, sulphur and catalyst. The catalyst causes the Hydrogen Polysulphides (H2SX) to quickly decompose to H2S which is rapidly transferred from the liquid phase into the gaseous phase by the enormous number of highly agitated bubbles. The catalyst is selected for the temperature range of the incoming sulphur and ease of removal in the last reactor.