AIRLIFT PUMP WITH HELICAL FLOW PATTERN

摘要

The airlift pump with helical flow pattern includes a nozzle body having a fluid passage therethrough. A plurality of air or gas injector nozzles surrounds the central passage. The outward side of each nozzle is tangent to the fluid passage wall through the body to produce circumferential flow in the fluid passage. Each of the air injector nozzles is also inclined in the direction of flow through the body, the tangential inclination resulting in a helical flow pattern through the body. The centrifugal force generated by the circumferential and helical flow through the body results in a pressure decrease through the core of the fluid passage, thereby enhancing entrainment of fluid into the device to increase its efficiency. The fluid passage through the nozzle body is devoid of any structure, and the inlet end of the passage is smoothly radiused to further increase the efficiency of the device.

主权项

1. An airlift pump with helical flow pattern, comprising:
a nozzle body having an inlet end and an outlet end opposite the inlet end, the nozzle body defining a concentric fluid flow passage through the body, the fluid flow passage extending from the inlet end to the outlet end of the nozzle body and having a passage wall defining a fluid flow passage diameter; a plurality of air injection nozzles extending into the nozzle body for the injection of air into the fluid flow passage, each of the air injection nozzles having an inlet end and an outlet end opposite the inlet end, each of the air injection nozzles having an axis wherein the outlet end of each of the nozzles communicates with the fluid flow passage at a non-zero angle away from tangent to the passage wall of the fluid flow passage, each of the air injection nozzles having an axis being inclined vertically, laterally, and radially within the nozzle body in order to produce non-tangential helical flow of liquids through the fluid flow passage from the inlet end to the outlet end of the nozzle body, the outlet end of each of the nozzles being oriented toward the outlet end of the nozzle body; a riser receptacle disposed within the outlet end of the nozzle body, the riser receptacle having a larger internal diameter than the fluid flow passage; and a riser pipe having a lower end disposed within the riser receptacle of the nozzle body and extending upward therefrom, the riser pipe having a smooth and uniform internal diameter equal to the diameter of the fluid flow passage.