Coaxial tubular fluid treatment device and system

A fluid treatment device, the device comprising:

• an outer tube comprising an inner surface;
• an inner tube coaxially disposed within the outer tube, the inner tube comprising an inner surface and an outer surface that extend between opposite ends of the inner tube, the outer surface of the inner tube and the inner surface of the outer tube defining an annulus that axially extends between the ends of the inner tube;
• a plurality of blades disposed within the annulus, the plurality of blades configured to alter a component of a flow direction of a fluid flowing over the plurality of blades in a circumferential direction and/or a radial direction, wherein each blade of the plurality of blades comprises:
• a proximal end coupled to the outer surface of the inner tube,
• a distal end opposite and spaced apart from the proximal end along a transverse axis of the blade,
• a leading edge, and
• a trailing edge,
• wherein the leading edge and the trailing edge extend between the proximal and distal ends, and a longitudinal axis of the blade extends through the leading edge and the trailing edge, a blade plane of each blade includes the transverse axis and the longitudinal axis of the respective blade, wherein the transverse axis of each blade is radially spaced apart from an inner tube longitudinal axis of the inner tube such that each blade of the plurality of blades extends at an oblique angle relative to a tangent of the outer surface of the inner tube;
• and
• a media disposed within the inner tube;
• wherein the inner tube defines a plurality of perforations extending between the outer surface and the inner surface,
• wherein the annulus defines an entire flow path of the fluid flowing between the outer tube and the inner tube,
• wherein a first subset of blades of the plurality of blades are arranged in a first row circumferentially around the inner tube, and second subset of blades of the plurality of blades are arranged in a second row circumferentially around the inner tube, wherein the first row is axially spaced apart from the second row, and the blade planes for a first blade in the first subset and a first blade in the second subset are coplanar, and
• wherein the flow direction of the fluid flowing over the blades is altered such that a radially outward portion of the fluid is moved radially inwardly toward the plurality of perforations of the inner tube.