System for tail gas treatment of sulfur recovery units
AssigneeSaudi Arabian Oil Company
InventorsAadesh Harale, Mourad Younes, Maytham Musawi
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Abstract
A process for recovering sulfur from a tail gas stream comprising the steps of providing a tail gas stream to a chemical looping combustion (CLC) unit, the tail gas stream comprising a sulfide component, providing an oxygen carrier to the CLC unit, the oxygen carrier comprising a calcium carbonate, providing an air stream to the CLC unit, the air stream comprising oxygen, and reacting the sulfide component in the CLC unit with the calcium compound and the air to produce a product effluent, the product effluent comprising calcium sulfate.
Claims14
A system for recovering sulfur from a tail gas stream, the system comprising:
- an air reactor, where the air reactor operates at an air reaction temperature and an air reaction pressure, where the air reactor comprises a fluidized bed reactor, where the fluidized bed comprises calcium carbonate;
- an air reactor separator fluidly connected to the air reactor and a calciner separator, where the air reactor separator comprises a solid-gas separation unit;
- the calciner unit fluidly connected to the air reactor separator and a calciner separator, where the calciner unit operates at a calciner reaction temperature and a calciner reaction pressure;
- the calciner separator fluidly connected to the calciner unit and a fuel reactor, where the calciner separator comprises a solid-gas separation unit;
- the fuel reactor fluidly connected to the calciner separator, where the fuel reactor operates at a fuel reaction temperature and fuel reaction pressure, where the fuel reactor comprises a fluidized bed reactor, where the fluidized bed comprises calcium carbonate;
- and
- a fuel reactor separator fluidly connected to the fuel reactor and the air reactor, where the fuel reactor separator comprises a solid-gas separation unit.
A system for recovering sulfur from a tail gas stream, the system comprising:
- an air reactor, where the air reactor operates at an air reaction temperature and an air reaction pressure, where the air reactor comprises a fluidized bed reactor, where the fluidized bed comprises calcium carbonate;
- an air reactor separator fluidly connected to the air reactor and a calciner separator, where the air reactor separator comprises a solid-gas separation unit;
- the calciner unit fluidly connected to the air reactor separator, where the calciner unit operates at a calciner reaction temperature and a calciner reaction pressure;
- a calciner separator fluidly connected to the calciner unit and a fuel reactor, where the calciner separator comprises a solid-gas separation unit;
- the fuel reactor fluidly connected to the calciner separator, where the fuel reactor operates at a fuel reaction temperature and fuel reaction pressure, where the fuel reactor comprises a fluidized bed reactor, where the fluidized bed comprises calcium carbonate;
- a fuel reactor separator fluidly connected to the fuel reactor, the air reactor, and a reducing reactor, where the fuel reactor separator comprises a solid-gas separation unit;
- the reducing reactor fluidly connected to the fuel reactor separator and the air reactor separator, where the reducing reactor operates at a reducing pressure and a reducing temperature;
- and
- a reducing reactor separator fluidly connected to the reducing reactor and the calciner unit, where the reducing reactor separator comprises a solid-gas separation unit.
A system for recovering sulfur from a tail gas stream, the system comprising:
- a sulfur recovery unit, the sulfur recovery unit configured to produce a tail gas stream and an elemental sulfur stream from an acid gas stream;
- and
- a chemical looping combustion (CLC) unit fluidly connected to the sulfur recovery unit, the CLC unit configured to produce a product effluent, the product effluent comprising calcium sulfate.
Dependencies are inferred from the claim text.