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Mixing device

A mixing device, mixing chamber technology, used in mixers, fluid mixers, transportation and packaging, etc.

Inactive Publication Date: 2011-10-05
VOITH PATENT GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Therefore, the technical problem to be solved by the present invention is to reduce energy consumption without significantly destroying the flotation results

Method used

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Examples

Experimental program
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Embodiment Construction

[0027] according to figure 1 , the aqueous fiber suspension 1 to be floated is conducted into the flotation vessel 2 via at least one mixing device 5 , wherein the mixing device 5 is located in the flotation vessel 2 .

[0028] In this case, the mixing device 5 is essentially formed by rotationally symmetrical boundary walls of the channel, wherein the fiber suspension 1 is introduced from above. A feed device 10 extending perpendicularly to the flow direction in the form of a nozzle for aerating the fibrous suspension 1 opens into the channel from multiple sides.

[0029] Such as figure 2 As shown, the mixing device 5 also has a plurality of flow channels 7 with here, for example, a circular cross section, each for forming a respective subflow of the fiber suspension 1 .

[0030] At least one gas flow in the form of compressed air or air originating from the flotation vessel 2 is fed to these subflows of the fiber suspension 1 from multiple sides of the boundary wall of th...

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Abstract

The invention relates to a mixing device (5) of a flotation device for removing impurities from an aqueous fibrous material suspension (1) in a flotation tank (2) using gas bubbles, wherein at least one stream of the fibrous material suspension (1) flows through the mixing device and the mixing device comprises at least one supply (10) of a stream of gas, wherein the stream of the fibrous material suspension (1) is guided in the mixing device (5) through one or more flow channels (7). The energy requirement should be reduced in the process as a result of the flow velocity of the fibrous material suspension (1) in the flow channels (7) being between 8 and 12 m / s.

Description

technical field [0001] The invention relates to a mixing device of a flotation plant for removing impurities from an aqueous fiber suspension in a flotation vessel by means of air bubbles, said mixing device being passed through by at least one flow of the fiber suspension and having Feed device for at least one gas flow, wherein the fiber suspension flow is conducted in the mixing device via one or more flow channels into the mixing device. Background technique [0002] Flotation devices of the stated type have already been known and are used in particular for the treatment of fiber suspensions which are at least partially obtained from secondary raw materials, preferably old paper. [0003] The fact that fibers are hydrophilic while impurities are often hydrophobic is exploited in the flotation process. While the hydrophilic fibers remain in suspension, the hydrophobic impurities travel with the flotation bubbles to the flotation froth. [0004] In addition to dissolved ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21B1/32D21F1/70B03D1/24
CPCB01F5/0268B03D1/24D21B1/327B03D1/247D21F1/70Y02W30/64B01F25/25
Inventor 阿克塞尔·德雷尔
Owner VOITH PATENT GMBH