Vane-type fluid impeller and method of aerating a liquid
AssigneeShionogi & Co., Ltd.
InventorsTakayasu Sonoyama, Hiroyoshi Tani, Kobee Kobayashi
Life of this patent
Estimating the term…
Abstract
A provision of the disclosed grating composed of closed loops of plurality of parallelly-arranged straps with clearances between adjacent straps is made to encompass a space of a body of a revolution defined by a vane-type impeller. It proves to be effective for improving gas-absorption by a better gas-liquid contact in a chemical process or fermentation process.
Claims22
A vane-type fluid impeller for aerating a fluid by injecting a gaseous fluid therein, said gaseous fluid having gas bubbles disposed therein, comprising:
- hub means having an axis of rotation, said gaseous fluid initially moving approximately parallel to said axis of rotation;
- vane means connected with and arranged circumferentially around said hub means for receiving said gaseous fluid and for forcing at least a portion of said gaseous fluid to move approximately perpendicular to the axis of rotation of said hub means;
- and
- strap means defining a grating substantially surrounding and co-rotating with said vane means for receiving said gaseous fluid from said vane means and for shearing said gas bubbles disposed within said gaseous fluid.
A vane-type fluid impeller in accordance with claim 17 or 20 wherein said strap means comprises a plurality of loops, an internal surface of each of said loops being in contact with the other end of each of said paddles, each of said loops being disposed closely together and forming a plurality of spaces therebetween for defining said grating, said grating receiving said gaseous fluid moving approximately perpendicular to the axis of rotation and shearing said gas bubbles disposed within said gaseous fluid.
A gas-liquid contact apparatus for aerating a liquid by injecting a gaseous fluid therein, said gaseous fluid having gas bubbles disposed therein, comprising:
- (a) container means for containing said liquid;
- (b) a vane-type fluid impeller means comprising hub means having an axis of rotation, said gaseous fluid initially moving substantially parallel to said axis of rotation, vane means connected with and arranged circumferentially about said hub means, said vane means forcing at least a portion of said gaseous fluid to move substantially perpendicular to said axis of rotation, and strap means defining a grating substantially surrounding and co-rotating with said vane means for receiving said gaseous fluid and for shearing said gas bubbles disposed within said gaseous fluid;
- and
- (c) nozzle means arranged in close proximity to said fluid impeller for injecting gas into said liquid thereby forming said gaseous fluid.
A chemical or fermentation process wherein a gas is contacted with a liquid to assist said process, comprising the steps of:
- (a) introducing a gas into said liquid thereby forming a gaseous fluid having gas bubbles disposed therein;
- and
- (b) rotating a vane-type fluid impeller in said gaseous fluid, said impeller comprising,
- (1) hub means having an axis of rotation,
- (2) vane means connected with and arranged circumferentially about said hub means, and
- (3) strap means defining a grating substantially surrounding and co-rotating with said vane means;
- (c) directing said gaseous fluid into said liquid in close proximity to said fluid impeller and to initially move substantially parallel to said axis of rotation, rotating said vane means to receive said gaseous fluid and to direct said fluid toward said strap means;
- and
- (d) shearing said gas bubbles disposed within said gaseous fluid by means of said strap means.
Dependencies are inferred from the claim text.