Back to results
US 10,246,328 B2Granted
High efficiency process for degassing of hydrogen sulfide from liquid sulfur
AssigneeWorleyParsons Europe Ltd.
InventorsElmo Nasato, Frank Bela, Bill DeWees, Lance Christie, Stephen Pollitt, Robin Street, David Evans
Life of this patent
Estimating the term…
Abstract
Processes and systems for degassing liquid sulfur may include mixing a gas, such as air, with a liquid sulfur mixture comprising sulfur, hydrogen sulfide, and hydrogen polysulfides to form a sulfur-gas mixture. The sulfur-gas mixture may then be transported to a separator, storage vessel or storage tank for separating the sulfur-gas mixture.
Claims20
A process for degassing liquid sulfur, the process comprising:
- mixing a gas with a liquid sulfur mixture comprising sulfur, hydrogen sulfide, and hydrogen polysulfides to form a sulfur-gas mixture;
- transporting the sulfur-gas mixture to a separator, storage vessel or storage tank;
- separating the sulfur-gas mixture at a pressure below a water condensation point to recover a degassed sulfur product and a vapor stream comprising hydrogen sulfide;
- wherein mixing gas with the liquid sulfur mixture comprises:
- introducing the gas into a suction of a sulfur transfer pump used for transporting the liquid sulfur mixture to the separator, storage vessel or storage tank;
- introducing the gas into a transfer line during transport of the liquid sulfur mixture to the separator, storage vessel or storage tank;
- or
- a combination thereof.
5 more elements
A process for degassing liquid sulfur, the process comprising:
- transporting, from a sulfur pit or vessel, a liquid sulfur mixture comprising sulfur, hydrogen sulfide, and hydrogen polysulfides via a sulfur transfer pump;
- introducing gas into a suction of the sulfur transfer pump, the sulfur transfer pump mixing the gas and the liquid sulfur mixture to form a sulfur-gas mixture;
- separating the sulfur-gas mixture to recover a degassed sulfur product and a vapor stream comprising hydrogen sulfide.
A system for degassing liquid sulfur, the system comprising:
- a sulfur pit or vessel containing a liquid sulfur mixture comprising sulfur, hydrogen sulfide, and hydrogen polysulfides;
- a separator, storage vessel or storage tank;
- a sulfur transfer pump for transferring the liquid sulfur mixture from the sulfur pit to the separator, storage vessel or storage tank;
- a feed line for introducing pressurized gas to the liquid sulfur during transfer from the sulfur pit or vessel to the separator, storage vessel or storage tank, wherein the pressurized gas comprises air, nitrogen, oxygen, oxygen enriched air, SO2, CO2, Claus reactor tail gas, SRU tail gas and tail gas treatment unit recycle gas or tail gas, or a mixture thereof;
- a separator, storage vessel or storage tank vapor outlet for recovering a vapor product comprising hydrogen sulfide;
- and
- a separator, storage vessel or storage tank liquid outlet for recovering a degassed liquid sulfur product.
4 more elements
Dependencies are inferred from the claim text.