System and method for deaeration
A deaerator includes gas nucleation media and a porous barrier. The deaerator may include growth media between the gas nucleation media and the porous barrier. The deaerator may be part of a system for removing gas from a fluid, where the system includes a tank with a fluid inlet and a fluid outlet and having a fluid flow path from the fluid inlet to the fluid outlet, and where the deaerator is in the fluid flow path. A method for removing gas from a fluid includes passing the fluid through the deaerator defining a fluid flow path.
1 . A deaerator for use in a hydraulic system, the deaerator comprising:
a cylindrical body comprising:
gas nucleation media configured to induce nucleation of gas dissolved in a hydraulic fluid to form gas cavities, wherein the gas nucleation media has a mean pore size of 30 μm or less as measured by ASTM F316 and a basis fiber surface area of 10 m 2 /m 2 to 200 m 2 /m 2 as measured by the Carmen-Kozeny method;
growth media adjacent and downstream of the gas nucleation media, the growth media having a solidity of 20% or less at 1.5 psi and being capable of inducing coalescence or growth or coalescence and growth of the gas cavities;
a porous barrier adjacent and downstream of the growth media, the porous barrier comprising a wire mesh or a woven screen and having openings forming an outlet, the openings being sized 125 μm or smaller;
a top comprising an inlet; and
a closed bottom end cap.
2 . The deaerator of claim 1 further comprising a gap between the growth media and the porous barrier.
3 . The deaerator of claim 1 , wherein the gas nucleation media comprises particulate filtration media.
4 . The deaerator of claim 1 , wherein the gas nucleation media comprises cellulose, regenerated cellulose, polyamide, polyester, polyethersulfone (PES), polypropylene (PP), polyethylene (PE), polytetrafluoroethylene (PTFE), polyvinylidene difluoride (PVDF), glass, ceramic, carbon fiber, or a combination thereof.
5 . The deaerator of claim 1 , wherein the gas nucleation media comprises material having an oil contact angle of at least 30°.
6 . The deaerator of claim 1 , wherein the gas nucleation media comprises oleophobic material having an oleophobic rating of 1 or greater as measured by the AATCC method 118.
7 . The deaerator of claim 1 , wherein the growth media comprises a plurality of layers of media.
8 . The deaerator of claim 1 , wherein the growth media is immediately adjacent the gas nucleation media.
9 . The deaerator of claim 1 , wherein the growth media comprises cellulose, regenerated cellulose, polyamide, polyester, polyethersulfone (PES), polypropylene (PP), polyethylene (PE), polytetrafluoroethylene (PTFE), polyvinylidene difluoride (PVDF), glass, ceramic, carbon fiber, or a combination thereof.
10 . The deaerator of claim 1 , wherein the porous barrier comprises openings sized 250 μm or less.
11 . The deaerator of claim 1 further comprising a liner.
12 . The deaerator of claim 1 further comprising a first end cap comprising an opening defining the inlet.
13 . The deaerator of claim 1 , wherein the gas nucleation media surrounds and defines an open deaerator interior.
14 . The deaerator of claim 1 , wherein the growth media has a solidity of 9% or less at 1.5 psi and a thickness of 0.8 mm or greater.
15 . The deaerator of claim 1 , wherein the growth media comprises a composite of oleophilic components and oleophobic components, wherein the oleophobic components have an oleophobic rating of 1 or greater as measured by AATCC method 118.
16 . The deaerator of claim 1 , wherein the porous barrier comprises an oleophobic surface with an oleophobic rating of 1 or greater as measured by AATCC method 118.
17 . The deaerator of claim 1 , wherein the porous barrier comprises a composite of oleophilic components and oleophobic components, wherein an oleophobic component has an oleophobic rating of 1 or greater as measured by AATCC method 118.
18 . A system for removing gas from a hydraulic fluid, the system comprising:
a tank comprising a fluid inlet and a fluid outlet and having a fluid flow path from the fluid inlet to the fluid outlet; and
the deaerator of claim 1 disposed inside the tank.