Method for controlling rapid stirrer, and rapid stirrer
AssigneeKubota Corporation
InventorsTakashi Tamura, Ryuji Higashi
Life of this patent
Estimating the term…
Abstract
In a rapid stirrer that stirs sludge and a flocculant in a tank with a stirring blade, the rotation speed of the stirring blade is increased at a set rate with an increase in the amount of charged sludge, the rotation speed of the stirring blade is reduced at the set rate with a decrease in the amount of charged sludge, and flocculated flocs having a fixed floc diameter are stably generated even when operating conditions change so as to fluctuate the amount of charged sludge.
Claims12
A method for controlling a rapid stirrer that stirs sludge and a flocculant in a tank with a stirring blade, the method comprising the steps of:
- increasing a rotation speed of the stirring blade at a set rate with an increase in an amount of charged sludge or an amount of a solid;
- reducing the rotation speed of the stirring blade at the set rate with a decrease in the amount of charged sludge;
- and
- stably generating flocculated flocs with a fixed floc diameter even when operating conditions change so as to fluctuate the amount of charged sludge.
A method for controlling a rapid stirrer that stirs sludge and a flocculant in a tank with a stirring blade, the method comprising the steps of:
- increasing a rotation speed of the stirring blade at a set rate with an increase in an amount of charged flocculant;
- reducing the rotation speed of the stirring blade at the set rate with a decrease in the amount of charged flocculant;
- and
- stably generating flocculated flocs with a fixed floc diameter even when operating conditions change so as to fluctuate an amount of charged sludge.
A rapid stirrer comprising:
- a rapid stirring tank for stirring sludge and a flocculant;
- a stirrer having a stirring blade that rotates around an axis of a drive shaft disposed in the rapid stirring tank;
- a sludge supply system that supplies sludge into the rapid stirring tank;
- a flocculant supply system that charges the flocculant into sludge to be supplied into the rapid stirring tank;
- and
- a stirrer controller that controls a rotation speed of the stirrer,
- wherein the stirrer controller increases a rotation speed of the stirring blade at a set rate with an increase in an amount of sludge charged by the sludge supply system or an amount of a solid, and reduces the rotation speed of the stirring blade at the set rate with a decrease in the amount of sludge charged by the sludge supply system.
A rapid stirrer comprising:
- a rapid stirring tank for stirring sludge and a flocculant;
- a stirrer having a stirring blade that rotates around an axis of a drive shaft disposed in the rapid stirring tank;
- a sludge supply system that supplies sludge into the rapid stirring tank;
- a flocculant supply system that charges the flocculant into sludge to be supplied into the rapid stirring tank;
- and
- a stirrer controller that controls a rotation speed of the stirrer,
- wherein the stirrer controller increases a rotation speed of the stirring blade at a set rate with an increase in an amount of flocculant charged by the flocculant supply system, and reduces the rotation speed of the stirring blade at the set rate with a decrease in the amount of flocculant charged by the flocculant supply system.
Dependencies are inferred from the claim text.