Screening device for paper making

Abstract

It is an object of the present invention to provide a small paper-making sieve device capable of efficiently classifying disintegrated fibers to improve the classifying effect. The screen filter (S) for paper making is dissociated from the other side of the screen filter (2) by the dissociation part (62A, 62B, 63A) on one side of the stirring member in the region of the papermaking material with high concentration on the downstream side of the screen filter (2). Parts (21, 22) cooperate to disintegrate, and the dissociated fibers are guided to the outside from the inner side of the cylindrical screen filter (2) opposite to the end side stirring members (62, 63) to be selected, The beneficiation effect can be improved, and since the dissociation function (62A, 62B, 63A, 21, 22) is provided inside the sieve filter, the vertical height of the sieve filter (2) can be effectively used, and the overall size of the device can be reduced .

Description

technical field [0001] The present invention relates to a paper-making screening device, in particular to a compact paper-making screening device capable of effectively beneficiating dissociated fibers to improve the beneficiation effect. Background technique [0002] Conventionally, there has been a screening device for paper-making raw materials provided with a dissociation function (for example, the device described in Patent Document 1). [0003] In this screening device for papermaking raw materials, vanes are arranged on the outer periphery of the rotor, and the pressure change when the vanes pass through the screen cylinder is used to clean the mesh of the screen cylinder, so as to continuously process the screen cylinder. Selection of paper raw materials. [0004] prior art literature [0005] patent documents [0006] Patent Document 1: Japanese Unexamined Patent Publication No. 2014-55377 [0007] However, since the papermaking stock with a high concentration o...

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Problems solved by technology

[0007] However, since the papermaking stock with a high concentration on the downstream side of the screen cylinder of the above-mentioned papermaking stock screening device will be dissociated in the dissociation part, and the dissociated fibers will return to the upstream side of the screen cylinder, so the returned part It will reduce the inflow of papermaking raw materials from the raw material inlet, and since the dissociation part is located in a different place from the screen filter drum for beneficiation, if you want to increase the vertical height of the screen filter drum, there will be a device The problem that the height of the vertical direction becomes higher and the overall size of the device becomes larger

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