Mixing apparatus and its use
AssigneeOutotec (Finland) Oy
InventorMarko Latva-Kokko
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Abstract
A mixing apparatus for mixing particles in a liquid and its use are disclosed. The mixing apparatus comprises a tank having a bottom and a substantially vertical side wall, an agitation means comprising a rotation shaft located vertically and centrally in the tank, and an impeller arranged at a height above the bottom at the end of the rotation shaft and the impeller being a downward pumping axial or mixed flow impeller. The bottom is equipped with a corrugated formation comprising alternate consecutive ridges and valleys, the ridges and valleys extending radially in relation to a center of the bottom, whereby the valleys concentrate and channel the mixing power near to the bottom to direct the flow of the liquid and to increase the velocity of the flow near to the bottom.
Claims26
A mixing apparatus for mixing particles in a liquid, the mixing apparatus comprising:
- a tank having a bottom and a substantially vertical side wall;
- an agitator comprising a rotation shaft vertically and centrally disposed in the tank;
- and
- an impeller arranged at a height above the bottom at the end of the rotation shaft and the impeller being a downward pumping axial flow impeller,
- wherein the bottom is equipped with a corrugated formation comprising alternate consecutive ridges and valleys, the ridges and valleys extending radially in relation to a center of the bottom, whereby the valleys concentrate and channel the mixing power at least near to the bottom to direct flow of the liquid and to increase a velocity of the flow near to the bottom, wherein at least one of the ridges has a straight upper profile, wherein a height of the upper profile decreases when moving from the side wall towards the center of the bottom of the tank, the highest point of the ridge being at a height of 0.1-1 times the radius of the bottom, and wherein a floor of at least one of the valleys is horizontal for its entire length, wherein the upper profile of the at least one of the ridges extends under the impeller, and wherein the impeller is arranged above the ridges without contacting the ridges.
A mixing apparatus for mixing particles in a liquid, the mixing apparatus comprising:
- a tank having a bottom and a substantially vertical side wall,
- an agitator comprising a rotation shaft vertically and centrally disposed in the tank, and an impeller arranged at a height above the bottom at the end of the rotation shaft and the impeller being a hydrofoil impeller, a propeller, or a pitched-blade turbine,
- wherein the bottom is equipped with a corrugated formation comprising alternate consecutive ridges and valleys, the ridges and valleys extending radially in relation to a center of the bottom, whereby the valleys concentrate and channel the mixing power at least near to the bottom to direct flow of the liquid and to increase a velocity of the flow near to the bottom, wherein at least one of the ridges has a straight vertex, wherein a height of the vertex decreases when moving from the side wall towards the center of the bottom of the tank the highest point of the vertex of the ridge is at a height of 0.1-1 times the radius of the bottom, and wherein a floor of at least one of the valleys is horizontal for its entire length, wherein the vertex of at least one of the ridges extends under the impeller, and wherein the impeller is arranged above the ridges without contacting the ridges.
Dependencies are inferred from the claim text.