Disclosed are coalescers, systems, and methods for coalescing a mixture of two phases, namely a continuous phase and a dispersed phase. The disclosed coalescers, systems, and methods include or utilize one or more layers of media material having a distinct mean pore size and wettability. The disclos
Disclosed are coalescers, systems, and methods for coalescing a mixture of two phases, namely a continuous phase and a dispersed phase. The disclosed coalescers, systems, and methods include or utilize one or more layers of media material having a distinct mean pore size and wettability. The disclosed coalescers, systems, and methods are effective for removing the dispersed phase from the mixture.
대표청구항▼
1. A coalescer comprising: coalescing media for coalescing a mixture of two phases, namely a continuous phase comprising hydrocarbon liquid and a dispersed phase comprising water, the mixture flowing through the media from upstream to downstream, the media comprising a layer of media material for fi
1. A coalescer comprising: coalescing media for coalescing a mixture of two phases, namely a continuous phase comprising hydrocarbon liquid and a dispersed phase comprising water, the mixture flowing through the media from upstream to downstream, the media comprising a layer of media material for filtering the mixture, the media material having a mean pore size, M, wherein the dispersed phase comprises water droplets having an average particle size that is greater than the mean pore size, the media material being relatively non-wettable with respect to the dispersed phase, wherein 0.2 μm≦M≦12.0 μm and the media material has a maximum pore size MM and 1≦MM/M≦3; andan additional layer of media material adjacent to the upstream face of the media material, the adjacent layers extending in series from upstream to downstream, namely an upstream first layer of media material and a downstream second layer of media material, the first layer of media material being relatively wettable by the dispersed phase in the continuous phase, and the first layer and the second layer having mean pore sizes M1 and M2, respectively, and M1>M2,wherein the coalescer is configured to filter the mixture as it flows from upstream to downstream in the coalescer. 2. The coalescer according to claim 1, wherein the media material comprises fibers having a mean diameter between 0.07 μm and 3 μm. 3. The coalescer according to claim 2, wherein the fibers comprise polyester material. 4. The coalescer according to claim 2, wherein the media material further comprises coarse fibers with a mean diameter greater than 10 μm. 5. The coalescer according to claim 4, wherein the coarse fibers comprise a hydrophobic polymer which optionally is ethylene chlorotrifluoroethylene (ECTFE). 6. The coalescer according to claim 1, wherein the media material has a thickness measured from upstream to downstream between 0.05 and 0.3 mm. 7. The coalescer according to claim 1, wherein the contact angle for a drop of dispersed phase in the continuous phase on the media material is no less than 90°. 8. The coalescer according to claim 1, wherein the media material has a porosity that is no less than 0.8. 9. The coalescer according to claim 1, wherein M1 is at least about 2.5 times greater than M1. 10. The coalescer according to claim 1, wherein M1≧30 μm. 11. The coalescer according to claim 1, wherein 0.2 μm≦M2≦12.0 μm. 12. The coalescer according to claim 1, wherein the first layer comprises media having an average fiber diameter that is less than about 100 μm. 13. The coalescer according to claim 1, wherein the contact angle for a drop of dispersed phase in the continuous phase on layer one, Ø1, is no more than 90° and the contact angle for a drop of dispersed phase in the continuous phase on layer two, Ø2, is no less than 90°. 14. The coalescer according to claim 1, wherein the first layer of media material has a downstream surface that comprises fibers that are oriented in a substantially vertical direction. 15. The coalescer according to claim 1, wherein the coalescing media is formed by obtaining a first media material and a second media material and physically or chemically coupling the first media material and the second media material in layers. 16. The coalescer according to claim 1, wherein the coalescing media is formed by melt-blowing the first media material and the second media material in layers. 17. The coalescer according to claim 1 contained in a housing, the housing having an upstream inlet structured to receive the mixture and a downstream outlet structured to discharge the mixture after coalescing of the dispersed phase. 18. A coalescing system comprising the coalescer according to claim 17. 19. The coalescing system according to claim 18, configured for removing water dispersed in hydrocarbon fuel. 20. The coalescing system according to claim 19, further comprising a hydrophobic media for removing water positioned downstream of the coalescing element. 21. The coalescing system according to claim 19, further comprising an additional device for removing water positioned downstream of the coalescing element, the device selected from a group consisting of gravity separator, centrifuge, impactor, lamella separator, inclined stacked plate, screen, and quiescent chamber. 22. A coalescer comprising: coalescing media for coalescing a mixture of two phases, namely a continuous phase comprising hydrocarbon liquid and a dispersed phase comprising water, the mixture flowing through the media from upstream to downstream, the media comprising a layer of media material for filtering the mixture, the media material having a mean pore size, M, wherein the dispersed phase comprises water droplets having an average particle size that is greater than the mean pore size, the media material being relatively non-wettable with respect to the dispersed phase, wherein 0.2 μm≦M≦12.0 μm and the media material has a maximum pore size MM and 1≦MM/M≦3, the media material comprises first fibers;wherein the coalescer is configured to filter the mixture as it flows from upstream to downstream in the coalescewherein the first fibers have a mean diameter between 0.07 μm and 3 μm. 23. The coalescer according to claim 22, wherein the first fibers comprise polyester material. 24. The coalescer according to claim 22, wherein the media material further comprises coarse fibers with a mean diameter greater than 10 μm. 25. The coalescer according to claim 24, wherein the coarse fibers comprise a hydrophobic polymer which optionally is ethylene chlorotrifluoroethylene (ECTFE). 26. A coalescer comprising: coalescing media for coalescing a mixture including a continuous phase comprising hydrocarbon liquid and a dispersed phase comprising water, the mixture flowing through the media from upstream to downstream, the media including a layer of media material for filtering the mixture, the media material having a mean pore size (“M”) and a maximum pore size (“MM”) wherein the dispersed phase comprises water droplets having an average particle size that is greater than the mean pore size, the media material being relatively non-wettable with respect to the dispersed phase, wherein 0.2 μm≦M≦12.0 μm and the media material has a maximum pore size MM, a ratio of MM to M is less than three and approaches one; andan additional layer of media material adjacent to an upstream face of the media material, the adjacent layers extending in series from upstream to downstream, namely an upstream first layer of media material and a downstream second layer of media material, the first layer of media material being relatively wettable by the dispersed phase in the continuous phase, and the first layer and the second layer having mean pore sizes M1 and M2, respectively, and M1>M2.
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