System and method for treating wastewater from an oilfield well with co-production of power
AssigneeNuovo Pignone Tecnologie Srl
InventorsBrian REEVES, Jose Adrian CHAVEZ VELASCO
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Abstract
The wastewater treatment system comprising a combustor adapted to burn a fuel and generate pressurized combustion gas therewith. The system also includes gas turbine adapted to expand the pressurized combustion gas and generate mechanical power therewith. The system further includes a boiler adapted to receive expanded combustion gas from the gas turbine. The boiler is fluidly coupled to a wastewater line. In use, heat from the combustion gas generates steam from the wastewater and a brine is removed from the boiler through a brine discharge line. In some embodiments a steam cycle is also provided in the system to extract further power.
Claims26
A wastewater treatment system for treating wastewater from an oilfield well;
- the system comprising:
- an oilfield well;
- a combustor adapted to bum a fuel and generate pressurized combustion gas therewith;
- wherein the combustor is adapted to receive natural gas of an oilfield through a gas line;
- a pressure adjusting device, adapted to receive natural gas of the oilfield and to adapt a pressure thereof to a combustion pressure in the combustor;
- a gas turbine adapted to expand the pressurized combustion gas and generate mechanical power therewith;
- a boiler adapted to receive expanded combustion gas from the gas turbine and fluidly coupled to a wastewater line which delivers wastewater from the oilfield well;
- wherein in use heat from the combustion gas generates steam from the wastewater;
- and
- a brine discharge line from the boiler.
A method for treating wastewater from an oilfield well, the method comprising the following steps:
- delivering natural gas of the oilfield to a combustor;
- adapting a pressure of the natural gas of the oilfield to a combustor pressure;
- mixing natural gas of the oilfield well and compressed air and bum a resulting air-gas mixture in the combustor and generate pressurized combustion gas;
- expanding the combustion gas in a gas turbine and producing mechanical power therewith;
- and
- producing steam and a brine flow from said wastewater by evaporating wastewater using waste heat from the expanded combustion gas.
A wastewater treatment system for treating wastewater from an oilfield well;
- the system comprising:
- a combustor adapted to bum a fuel and generate pressurized combustion gas therewith;
- a gas turbine adapted to expand the pressurized combustion gas and generate mechanical power therewith;
- a boiler adapted to receive expanded combustion gas from the gas turbine and fluidly coupled to a wastewater line;
- wherein in use heat from the combustion gas generates steam from the wastewater;
- a brine discharge line from the boiler;
- and
- a steam turbine adapted to receive steam from the boiler, expand said steam to generate mechanical power and release spent steam in the atmosphere.
A method for treating wastewater from an oilfield well, the method comprising the following steps:
- generating pressurized combustion gas in a combustor;
- expanding the combustion gas in a gas turbine and producing mechanical power therewith;
- producing steam and a brine flow from the wastewater by evaporating wastewater using waste heat from the expanded combustion gas;
- and
- expanding the steam in a steam turbine and releasing spent steam in the atmosphere.
Dependencies are inferred from the claim text.