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Refiner

A technology of refiner and grinding disc, which is applied in pulp beating/refining method, textile and papermaking, fiber raw material treatment, etc. It can solve the problems of increasing energy consumption, fiber blockage, fiber flow, steam fiber mixture, etc.

Inactive Publication Date: 2012-07-04
ANDRITZ AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is also the risk of clumping of the fibers and consequently clogging the fiber flow or preventing the overall outflow of the steamed fiber mixture, which in turn increases energy consumption

Method used

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Experimental program
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Embodiment Construction

[0013] figure 1 A three-dimensional view of a refiner 1 according to the invention is shown, comprising a refiner housing 2 and a tangential fiber outlet 3 . The refiner housing 2 has a pivotable refiner door 4 and a live steam supply line 5 . exist figure 1 Also depicted is the drive 6 (motor) of the refiner 1 .

[0014] exist figure 2 A front view of a refiner 1 according to the invention is shown in . In addition to the tangentially arranged fiber outlet 3 and the refiner door 4 , the actuator 7 for the regulating valve and the drive 8 embodied here as a self-locking spindle drive can be seen here. Naturally, other adjusting drives can also be used.

[0015] image 3 A sectional view of a refiner housing 2 with a tangential fiber outlet 3 according to the invention is shown. The annular chamber, through which the steam / fiber mixture flows, is arranged around the grinding disc 9 . The valve flap 11 is located in the region of the connection of the fiber outlet 3 (he...

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PUM

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Abstract

Provided is a refiner, comprising at least one rotary type mill (9) and a refiner housing (2), wherein the housing (2) comprises a tangential fiber outlet (3) and an apparatus for controlling the outflow of the pressure and the fiber. The refiner is characterized in that a valve clack board (11) is arranged inside the housing (2). The steaming / fiber mixture is separated via the valve clack board in the following method: only separating the steam fully mixing with the fiber with the strongest force. Basically, the steam containing no fiber is left inside the refiner. Therefore, the amount of the fresh steam can be saved compared with the conventional system.

Description

technical field [0001] The invention relates to a refiner with at least one rotating disc and a refiner housing, wherein the refiner housing has a tangential fiber outlet and means for controlling the pressure and fiber outflow. Background technique [0002] Such a refiner is known, for example, from WO 2006 / 112769. The process of mechanically breaking down the fibers from the material (mostly wood chips) requires energy applied to the grinding discs through the refiner section. This energy is converted into heat so that the water contained in the material evaporates and pressure is created in the refiner housing from which most of the steam is output together with the fibers produced. Especially when using lignocellulose-containing materials for the production of fibers, especially for the wood industry (e.g. for medium density fiber (MDF) boards), refiners are used in which blow valves are used to control the flow rate from the refining The amount of steam coming out of ...

Claims

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Application Information

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IPC IPC(8): D21B1/12
CPCD21D1/30
Inventor 米夏埃尔·弗林特
Owner ANDRITZ AG