A reservoir evaporation system for evaporating fluid from an open reservoir of effluent containing a contaminant includes a fluid evaporator, an air pump, and an air supply conduit functionally connecting the fluid evaporator with the air pump. The fluid evaporator includes a vessel adapted to be po
A reservoir evaporation system for evaporating fluid from an open reservoir of effluent containing a contaminant includes a fluid evaporator, an air pump, and an air supply conduit functionally connecting the fluid evaporator with the air pump. The fluid evaporator includes a vessel adapted to be positioned in an operative position partially submerged on the top surface of the effluent in the reservoir with a lower chamber submerged in the effluent and an upper chamber extending above the top surface of the effluent. In operation, air from the air pump mixes with the effluent inside the fluid evaporator and subsequently is discharged through exhaust openings. A fluid discharge pipe can also simultaneously discharge aerated effluent back down into the reservoir. Fluid is thereby separated from the effluent in the lower chamber by evaporation in a controlled manner that minimizes spread of contaminants to surrounding environments by wind.
대표청구항▼
1. A fluid evaporator for evaporating fluid from an open fluid reservoir, the fluid evaporator comprising: a partially enclosed vessel having an upper chamber and a lower chamber, the vessel arranged to be operatively positioned in the fluid reservoir with the upper chamber disposed above a top surf
1. A fluid evaporator for evaporating fluid from an open fluid reservoir, the fluid evaporator comprising: a partially enclosed vessel having an upper chamber and a lower chamber, the vessel arranged to be operatively positioned in the fluid reservoir with the upper chamber disposed above a top surface of the fluid and the lower chamber disposed in the fluid;a first opening through a lower portion of the lower chamber;a gas supply tube extending into the lower chamber and having an air outlet disposed between the opening through the lower portion of the lower chamber and an upper portion of the lower chamber;an exhaust opening through the upper chamber and in fluid communication with the air outlet; anda discharge conduit having an inlet in fluid communication with the lower chamber and an outlet disposed below the lower chamber, the inlet separated from the lower portion of the chamber by a weir;wherein, when operatively positioned in the fluid reservoir, fluid from the fluid reservoir can enter into the lower chamber through the first opening, the air outlet is positioned to inject air into the fluid underneath the top surface, the air injected from the air outlet can exhaust out of the upper chamber through the exhaust opening, and the inlet is located below the top surface of the fluid. 2. The fluid evaporator of claim 1, wherein the discharge conduit comprises a tube that extends below the lower chamber when the fluid evaporator is operatively positioned and a vent tube oriented to allow escape of air entrapped in liquid in the discharge conduit. 3. The fluid evaporator of claim 1, further comprising flotation means located to cause the chamber to float operatively positioned on the top surface of the fluid. 4. The fluid evaporator of claim 3, wherein the flotation means comprises a portion of the upper chamber that entraps air above the top surface of the fluid when the fluid evaporator is operatively positioned in the fluid reservoir. 5. The fluid evaporator of claim 3, wherein the flotation means comprises a flotation device attached to the chamber. 6. The fluid evaporator of claim 5, wherein the flotation device comprises a buoyant member. 7. The fluid evaporator of claim 1, wherein the exhaust opening is directed downwardly to be pointed toward the top surface of the fluid when the fluid evaporator is operatively positioned. 8. The fluid evaporator of claim 1, wherein the exhaust opening is positioned to be directed horizontally when the fluid evaporator is operatively positioned. 9. The fluid evaporator of claim 1, further comprising a demister located to remove entrained liquid from air exiting the exhaust outlet. 10. The fluid evaporator of claim 9, wherein the demister comprises a baffle. 11. A fluid evaporator comprising: a vessel having an upper chamber and a lower chamber, the lower chamber defined by an annular wall having an open bottom end and an upper end separated from and in fluid communication with the upper chamber, and an exhaust outlet through the upper chamber;a gas supply tube extending into the lower chamber and having an outlet operatively disposed between the bottom end of the annular wall and the upper end, the gas supply tube and the annular wall defining an annular space therebetween; anda fluid outlet pipe having an inlet and a discharge outlet, the inlet in fluid communication with the lower chamber and disposed between the exhaust outlet and the bottom end of the lower chamber, wherein the fluid outlet pipe extends away from the inlet along the lower chamber. 12. The fluid evaporator of claim 11, further comprising a flotation device attached to the vessel arranged to cause the vessel to float in a pool of liquid with the bottom end of the annular wall disposed beneath a top surface of the pool and the upper chamber projecting upwardly from the top surface of the pool. 13. The fluid evaporator of claim 11, wherein the exhaust outlet is directed toward the lower chamber. 14. The fluid evaporator of claim 11, wherein the exhaust outlet is directed radially outwardly. 15. The fluid evaporator of claim 11, further comprising a solar energy collector connected with the vessel. 16. The fluid evaporator of claim 11, wherein the outlet further comprises sparge ports in a sidewall of the gas supply tube spaced from an open end of the gas supply tube. 17. The fluid evaporator of claim 11, further comprising: a middle chamber disposed between and adjacent each of the upper and lower chambers;a first baffle separating the lower chamber from the middle chamber, the first baffle having at least one first opening therethrough for fluid communication between the lower chamber and the middle chamber; anda second baffle separating the middle chamber from the upper chamber, the second baffle having at least one second opening therethrough for fluid communication between the middle chamber and the upper chamber. 18. The fluid evaporator of claim 17, wherein the inlet is directed into the middle chamber and disposed radially outwardly from the annular wall spaced from the second baffle, the fluid outlet pipe extending away from the middle chamber adjacent an exterior side of the lower chamber. 19. The fluid evaporator of claim 18, wherein the inlet is defined in a portion of the first baffle projecting radially outwardly from the annular wall. 20. The fluid evaporator of claim 17, further comprising one or more demister baffles in the upper chamber forming a tortuous exhaust path between the second opening and the exhaust outlet. 21. The fluid evaporator of claim 17, wherein the gas supply tube, upper, middle, and lower chambers are coaxially aligned. 22. A fluid evaporator for evaporating fluid from an open fluid reservoir, the fluid evaporator comprising: a partially enclosed vessel having an upper chamber and a lower chamber,flotation means with the vessel, the flotation means located to cause the chamber to float operatively positioned on the top surface of the fluid in the fluid reservoir with the upper chamber disposed above the top surface of the fluid and the bottom chamber disposed in the fluid;a first opening through a lower portion of the lower chamber;a gas supply tube extending into the lower chamber and having an air outlet disposed between the opening through the lower portion of the lower chamber and an upper portion of the lower chamber; andan exhaust opening through the upper chamber and in fluid communication with the air outlet;wherein, when operatively positioned in the fluid reservoir, fluid from the fluid reservoir can enter into the lower chamber through the first opening, the air outlet is positioned to inject air into the fluid underneath the top surface, and the air injected from the air outlet can exhaust out of the upper chamber through the exhaust opening. 23. The fluid evaporator of claim 22, wherein the flotation means comprises a plenum inside the upper chamber that entraps air above the top surface of the fluid when the fluid evaporator is operatively positioned in the fluid reservoir. 24. The fluid evaporator of claim 22, wherein the flotation means comprises a buoyant member attached to the vessel. 25. The fluid evaporator of claim 22, further comprising a discharge conduit having an inlet in fluid communication with the lower chamber and an outlet disposed below the lower chamber, the inlet separated from the lower portion of the chamber by a weir; wherein the inlet is located below the top surface of the fluid when operatively positioned in the fluid reservoir. 26. The fluid evaporator of claim 22, further comprising a demister located to remove entrained liquid from the air exiting the exhaust outlet. 27. A fluid evaporator comprising: a vessel having an upper chamber and a lower chamber;the lower chamber defined by an annular wall having an open bottom end and an upper end in fluid communication with the upper chamber;an exhaust outlet through the upper chamber;a gas supply tube extending into the lower chamber and having an outlet operatively disposed between the bottom end of the annular wall and the upper end, the gas supply tube and the annular wall defining an annular space therebetween; anda flotation device associated with the vessel, the flotation device arranged to cause the vessel to float in a pool of liquid with the bottom end of the annular wall disposed beneath the top surface of the pool and the upper chamber projecting upwardly from the top surface of the pool. 28. The fluid evaporator of claim 27, wherein the flotation device comprises a plenum inside the upper chamber. 29. The fluid evaporator of claim 27, wherein the flotation device comprises a buoyant member attached to the vessel. 30. The fluid evaporator of claim 27, further comprising a fluid outlet pipe having an inlet and a discharge outlet, the inlet in fluid communication with the lower chamber and disposed between the exhaust outlet and the bottom end of the lower chamber, and the fluid outlet pipe extending away from the inlet along the lower chamber. 31. The fluid evaporator of claim 27, further comprising: a middle chamber disposed between the upper and lower chambers, the upper and lower chambers disposed on opposite sides of the middle chamber;a first baffle separating the lower chamber from the middle chamber, the first baffle having at least one first opening therethrough for fluid communication between the lower chamber and the middle chamber; anda second baffle separating the middle chamber from the upper chamber, the second baffle having at least one second opening therethrough for fluid communication between the middle chamber and the upper chamber. 32. The fluid evaporator of claim 31, wherein the inlet opens into the middle chamber and is disposed radially outwardly from the annular wall spaced from the second baffle, the fluid outlet pipe extending away from the middle chamber along an exterior side of the lower chamber. 33. The fluid evaporator of claim 31, further comprising one or more demister baffles in the upper chamber, wherein the demister baffles form a tortuous exhaust path between the second opening and the exhaust outlet.
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