Cleaning of oleaginous water III
The present invention comprises a process and apparatus for separation of hydrocarbons from hydrocarbon-containing produced water, wherein in stage 1 the hydrocarbon-containing produced water is supplied with a gas-containing component, whereupon a gas- and hydrocarbon-containing produced water mixture is fed to an inlet tube ( 22, 27 ) in the center of a tank, whereupon the said mixture is tangentially distributed via at least one nozzle ( 7 ) and at least one baffle plate ( 8.1 ), whereupon separated hydrocarbons are conveyed to at least one outlet from the tank and cleaned water is conveyed to an outlet ( 12 ) from the tank.
1. An apparatus for separation of oil from oil-containing water, including:
a tank including a sidewall and a hollow interior with an axis defined through the tank;
a gas injection line;
an inlet tube extending into the tank interior and connected with the gas injection line;
a separation plate dividing the tank interior into a first tank chamber and a second tank chamber;
a first nozzle extending from the inlet tube and radially outward into the first tank chamber with respect to the tank axis and configured to convey oil-containing water into the first tank chamber;
a second nozzle extending from the separation plate and radially outward into the second tank chamber with respect to the tank axis and configured to convey oil-containing water into the second tank chamber;
the first nozzle or the second nozzle ending tangentially along the sidewall of the tank to distribute the oil-containing water tangentially along the sidewall of the tank;
an outlet in the bottom of the tank; and
an outlet at the top of the tank.
2. The apparatus of claim 1 , further including a baffle plate in the first tank chamber and extending radially inward with respect to the tank sidewall.
3. The apparatus of claim 1 , further including a baffle plate in the second tank chamber and extending radially inward with respect to the tank sidewall.
4. The apparatus of claim 1 , further including the outlet in the bottom of the tank being configured to convey the water out of the tank.
5. The apparatus of claim 1 , further including an outlet tube connected to the outlet in the bottom of the tank.
6. The apparatus of claim 4 , further including the outlet at the top of the tank being configured to convey the separated gas and oil out of the tank.
7. The apparatus of claim 1 , further including the first nozzle having first and second portions that are non-parallel with each other.
8. The apparatus of claim 1 , wherein the inlet tube extends from the bottom of the tank.
9. The apparatus of claim 1 , further including:
the separation plate including a central portion forming an annulus chamber around the inlet tube;
the second nozzle in fluid communication with the annulus chamber and having first and second portions that are non-parallel with each other.
10. The apparatus of claim 1 , further including a baffle plate extending radially inward with respect to the tank sidewall.
11. The apparatus of claim 1 , wherein the first nozzle and the second nozzle end tangentially along the sidewall of the tank to distribute the oil-containing water tangentially along the sidewall of the tank.
12. The apparatus of claim 1 , wherein:
the separation plate defines an annulus chamber formed about the inlet tube; and
the second nozzle extends from the annulus chamber into the second tank chamber.