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Apparatus for mixing

A technology of mixing chamber and rotor shaft, which is applied in the direction of mixer, mixing method, fluid mixer, etc., can solve the problems of temperature rise, limitation, etc.

Inactive Publication Date: 2007-10-24
METSO PAPER INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This phenomenon limits the amount of steam that can be added to the system and thus the desired temperature rise

Method used

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  • Apparatus for mixing
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Embodiment Construction

[0023] Fig. 1 shows a device according to an embodiment of the present invention. The device comprises a housing with a wall 2 forming a mixing chamber 4 and a first feeder 6 for supplying the pulp suspension to the mixing chamber. In addition, the device includes a rotor shaft 8 extending in the mixing chamber 4, a driving device (not shown) for rotating the rotor shaft, and a rotor body 10 connected to the rotor shaft 8. The rotor body is arranged to provide kinetic energy to the pulp suspension flow when the rotation of the driving device rotates the rotor shaft, so that turbulence is generated in a turbulence area 12 in the mixing chamber. The device also includes a second feeder 13 for feeding the chemical medium to the mixing chamber and an outlet for discharging the mixture of the chemical medium and the pulp suspension from the mixing chamber 4. The second feeder 13 includes at least one fixed feed tube 14, which extends from the wall 2 of the housing into the mixing chamb...

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PUM

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Abstract

The present invention relates to an apparatus for mixing of a chemical medium in gaseous or liquid state with a pulp suspension. The apparatus comprises a housing having a wall (2) that defines a mixing chamber (4), a first feeder (6) for feeding the pulp suspension to the mixing chamber, a rotor shaft (8, 104, 204, 300, 406, 502), that extends in the mixing chamber, a drive device for rotation of the rotor shaft, a rotor body (10, 200, 407, 504), that is connected to the rotor shaft and arranged to supply kinetic energy to the pulp suspension flow, during rotation of the rotor shaft by the rotation of the drive device, such that turbulence is produced in a turbulent flow zone (12) in the mixing chamber, a second feeder (13) for feeding of the chemical medium to the mixing chamber, and an outlet for discharging the mixture of chemical medium and pulp suspension from the mixing chamber.

Description

Technical field [0001] The invention relates to a device for mixing a gaseous or liquid chemical medium with a pulp suspension. Background technique [0002] In the process of processing pulp, it is necessary to mix different media for processing, for example for heating or bleaching purposes. Therefore, it is desirable to disperse the medium into the pulp suspension while conveying the pulp suspension through a pipe. Patent EP 664150 discloses a device that provides this function. In order to heat the pulp suspension, steam is added, and the added steam condenses and thereby releases its internal energy into the pulp suspension. A bleaching agent is added during the bleaching process, and the bleaching agent chemically reacts with the pulp suspension. In the process of recycling fiber pulp, the printing ink is separated by flotation, that is, the air is separated in the pulp suspension in advance so that the hydrophobic ink or the printing ink can adhere to the rising bubbles. I...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01F3/04B01F7/04D21C9/10B01F27/71
CPCB01F7/00908B01F5/0451B01F7/063B01F5/0466D21C9/10B01F25/31332B01F25/3131B01F27/50B01F27/711
Inventor O·梅兰德P·达尼尔森T·维克斯特姆
Owner METSO PAPER INC
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