Pulverization device
AssigneeZuiko Corporation
InventorTakahiro SHIMADA
Life of this patent
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Abstract
Provided is a pulverization device that pulverizes a pulp sheet and produces pulp fiber, the pulverization device being compact, having high processing capacity, and making it possible to suppress adverse events such as the pulp fiber burning or pulverization of the pulp sheet being inadequate. The pulverization device includes a plurality of rotary blades attached to a rotary shaft, the rotary blades rotating together with the rotary shaft and pulverizing the pulp sheet. A pulverization space index I [m3/kg] is defined using numerical expression (V [m3]×N [rpm]×60 [min])÷Amax [kg/h], where V [m3] is a volume of a void space within a virtual cylinder, N [rpm] is a rate of rotation of the rotary shaft, and Amax [kg/h] is a maximum pulverization amount.
Claims20
A pulverization device that pulverizes a pulp sheet and produces pulp fiber, the pulverization device comprising:
- a rotary shaft;
- a plurality of rotary blades attached to the rotary shaft, the rotary blades being configured to rotate together with the rotary shaft and pulverize the pulp sheet;
- a motor configured to cause the rotary shaft to rotate;
- and
- a casing having a supply port through which the pulp sheet is configured to be supplied and a discharge port through which the pulp fiber is configured to be discharged, the casing accommodating the rotary blades attached to the rotary shaft,
- a pulverization space index I [m3/kg] being defined using numerical expression (V [m3]×N [rpm]×60 [min])÷Amax [kg/h],
- where V [m3] is a volume of a void space within a virtual cylinder, for which a radius is a distance from a center of the rotary shaft to an end section of the rotary blade disposed furthest away from the center of the rotary shaft in a radial direction of the rotary shaft and for which a height is a segment distance within which the plurality of rotary blades are disposed in an axial direction of the rotary shaft, when the virtual cylinder is virtualized,
- N [rpm] is a rate of rotation of the rotary shaft, and
- Amax [kg/h] is a maximum amount of material pulverized by the pulverization device, and
- the volume V [m3], the rate of rotation N [rpm], and the maximum pulverization amount Amax [kg/h] being set so that the pulverization space index I [m3/kg] is equal to or greater than 12.0.
Dependencies are inferred from the claim text.