JP5280259B2 - Dryer canvas cleaner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cleaner for a dryer canvas which can surely remove paper powder and the like adheres to the dryer canvas without enlarging a setting space. <P>SOLUTION: There is provided the cleaner for the dryer canvas, in which a brush 71 for brushing the dryer canvas 21 on the travel of the dryer canvas 21 in a non-action region not supplied for the drying of paper P is set, and a suction port 72a is opened on the downstream side of the brush 71 in the travel direction of the dryer canvas 21. A blow-off port 73 is opened on the downstream side of the suction port 72a. Peeling air is blown from an oblique direction which is opposite to the travel direction of the dryer canvas 21, and guided to the suction port 72a by the utilization of Coanda effect to together recover paper powder and the like. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a cleaner for a dryer canvas that removes wet paper scraps and paper dust adhering to a dryer canvas that travels while pressing the paper against a dryer cylinder, for example, a dry part that is a step of drying paper in a papermaking process. The present invention also relates to a dryer canvas cleaner that prevents paper dust and the like removed by rubbing the surface of the canvas against a brush from scattering.

  A long net type paper machine is mainly composed of a wire part, a press part, a dry part, a calendar part, and a reel part. A papermaking material in which pulp is dispersed in water is supplied onto a net-like wire running from a stock inlet, and a paper layer is formed while dewatering while running. The paper is dried, the paper thickness is adjusted and smoothness is given by the calendar part, and the reel part is wound around the reel to complete the paper.

  In the dry part, drying is performed by pressing the paper while winding the paper along with a dryer canvas that travels while guiding the traveling of the paper to a dryer cylinder to which superheated steam is supplied. At this time, the upstream side of the dry part is in a wet paper state, so that the fibers peel from the paper surface and adhere to the dryer canvas. Moreover, paper powder generated on the surface of the paper adheres to the dryer canvas due to the progress of drying on the downstream side. Dryer canvas with such wet paper scraps or paper dust clogging may cause clogging, and it may not be possible to smoothly evaporate water from the paper. Clean the dryer canvas while operating the paper machine. Wet paper scraps, paper dust, and the like adhering to the dryer canvas are removed, and the dry part is equipped with various cleaners for the dryer canvas.

  As this type of dryer canvas cleaner, for example, a cylinder supported on a shaft so as to be pivotable on the frame and movable in the axial direction, an air inlet attached to the cylinder, and a shaft on the circumferential surface of the cylinder A brush having a thickness that is wider than the canvas width in the direction, a number of air blowing nozzles provided in the cylinder adjacent to the brush, a mechanism for rotating the cylinder by a predetermined angle, and a shaft of the cylinder There is a camber screening device comprising a mechanism that is connected to one of the two and pivots the same cylinder in the axial direction via the shaft (see Patent Document 1).

JP 56-118991 A

  In the cleaning device disclosed in Patent Document 1, the canvas traveling with respect to the brush is rubbed, and paper dust or the like scraped by the brush is scattered by the air blown from the air blowing nozzle to be removed. Is. In addition, an air blowing nozzle is provided on the opposite side of the brush across the canvas, and the paper dust scattered by the air blown from the air blowing nozzle is disposed on the brush side and between the pair of brushes. It is intended to be removed by suction from the suction port of the vacuum tube.

  However, when air is blown out from the air blowing nozzle, the scattered paper powder may be sucked by the traveling flow of the canvas and adhere to the canvas surface again. Further, in the structure in which the scattered paper dust is sucked from the suction port of the vacuum tube, the possibility that the paper dust again adheres to the canvas surface is reduced, but the air supply tube and the vacuum tube are arranged across the canvas. As a result, the installation space for equipment and the like becomes large. When installing new equipment, it can be assumed that this cleaning device has been installed from the design stage, so it is easy to secure the installation space. However, when installing in the dry part of an existing paper machine, it is Since equipment and the like are provided, the installation space may not be secured.

  Therefore, an object of the present invention is to provide a dryer canvas cleaner that can prevent paper dust and the like removed from the canvas surface from adhering to the canvas surface again without increasing the installation space.

As a technical means for achieving the above object, a cleaner for a dryer canvas according to the present invention is a part of a dry part that winds a dryer canvas around a dryer cylinder while guiding the paper to dry the paper. In a dryer canvas cleaner that is installed on a dryer canvas that travels in a non-operating area that is not involved in paper drying and removes paper dust and the like adhering to the dryer canvas, the surface of the dryer canvas is A brush body to be rubbed by, a suction means having a suction port opened facing the surface of the dryer canvas on the downstream side of the brush body, and a surface of the dryer canvas on the downstream side of the suction means. characterized in that an air blowing means blows stripping air obliquely in the opposite direction to the traveling direction It is.

  The dryer canvas circulates endlessly while being wound around the dryer cylinder. For this purpose, the working area is wound around the dryer cylinder to dry the paper, and the non-acting operation is completed and the action in the working area is terminated and returned to the working area again. The area exists. In this non-operation area, the paper dust and the like adhered thereto are removed by guiding the paper in the operation area. Since the paper guidance is performed on one side, that is, the surface of the dryer canvas, a large amount of paper dust or the like adheres to this surface. For this reason, while traveling in the non-operation area, the surface scrapes the brush body, and paper dust and the like adhering to the surface is scraped out by the brush body. The scraped paper dust and the like is accompanied by the traveling of the canvas by the traveling flow of the canvas. The paper dust and the like are sucked from a suction port of a suction means disposed on the downstream side of the brush body, captured, and discharged.

  Paper powder etc. on the canvas surface is scraped off by the brush body and peeled off from the canvas surface. However, paper dust etc., especially wet paper scraps, may not be scraped off by the brush body and remain attached to the canvas surface. . Residual paper powder or the like adhered to the canvas surface is to be peeled from the canvas surface by blowing the peeling air. Since the residual paper dust and the like are once scraped off by the brush body, it can be peeled off from the canvas surface relatively smoothly by blowing the peeling air. The peeled residual paper dust and the like are also sucked from the suction port.

In addition, the cleaner for the dryer canvas according to the invention of claim 2 is provided with a blowing guide means for blowing the peeling air blown from the air blowing means onto the surface of the dryer canvas, and a collection guide means for guiding the air to the suction port. It is characterized by providing.

  When it is necessary to blow the air for peeling onto paper dust or the like reliably, especially when it remains on the canvas surface like waste paper scraps, the air for peeling is blown to the position of the remaining paper dust or the like As described above, the guide is provided by the blowing guide means. Further, in order to surely discharge the paper dust and the like peeled from the canvas surface, the recovery guide means guides the peeling air accompanied by the paper dust and the like to the suction port. As this collection guide means, the Coanda phenomenon in which a fluid flows along the surface of the object can be used, and the separation air containing paper dust and the like is guided to the suction port on the surface of the collection guide means.

  According to the cleaner for a dryer canvas according to the present invention, the paper dust adhered to the canvas surface is surely removed by sucking the paper dust and the like scraped off from the canvas surface by the brush body from the suction port of the suction means. can do.

  Further, since paper dust and the like adhering to the canvas surface can be reliably peeled off by the peeling air, paper dust and the like on the canvas surface can be reliably removed.

Further, according to the cleaner for the dryer canvas according to the invention of claim 2 , since the peeling air containing the paper dust and the like is peeled from the canvas surface and is surely guided to the suction port, the paper dust and the like are more reliably removed. be able to.

It is a figure explaining the structure of the cleaner for dryer canvas concerning this invention, and is sectional drawing cut | disconnected by the surface along the traveling direction of a canvas. It is a figure which shows an example of the dry part which installs the cleaner for dryer canvass concerning this invention.

FIG. 2 is a diagram for explaining the structure of a part of a dry part D of a paper machine as an example of applying the cleaner for a dryer canvas according to the present invention. The paper P is a first group of the dry part D from a press part (not shown). It is fed to the dryer D _1. The first group dryer D ₁ is followed by the second group dryer D ₂ , and a plurality of stages including the Nth dryer group D _n are continuously formed to form the dry part D. Since the paper after the first group dryer D _1, which is the water squeezing by the press part is fed, in a state of a paper wet contain much moisture, by being fed to the subsequent group dryer Gradually dried.

The first group dryer D _1, will be described for implementing the dryer canvas cleaner of the present invention. The first group dryer D _1, a plurality of dryer cylinders 1a~1g are arranged, which in the dryer canvas 21 is wound. The dryer canvas 21 is guided by the guide rolls 3a~3f from the final dryer cylinder 1g of the first group dryer D _1, so as to be refunded to the first dryer cylinder 1a, so that the dryer canvas 21 moves endlessly circulating It is. While this dryer canvas 21 guides the paper P and presses the paper P against the dryer cylinders 1a to 1g, it is heated by the dryer cylinders 1a to 1g to evaporate water contained in the paper P. The area in which the dryer canvas 21 travels while being wound around the dryer cylinders 1a to 1g is defined as the active area, and the area in which the dryer canvas 21 travels from the guide roll 3a after the final dryer cylinder 1g to the guide roll 3f that guides to the first dryer cylinder 1a is not defined. It is set as an action area.

  Various cleaners of the dryer canvas 21 such as the first cleaner 5 and the second cleaner 6 are installed in the non-operation region along the direction of traveling from the guide roll 3a to the guide roll 3f. Then, between the first cleaner 5 and the second cleaner 6, a guide roller 3d is faced to install a brush cleaner 7 which is a dryer canvas cleaner according to the present invention.

Note that the second group of the dryer D ₂ drying cylinders 1h~1j a guide roll 3h~3k subsequent to the first group dryer D _1, the dryer canvas 22 is passed over are to be moved endlessly circulating. Similarly to the first group dryer D ₁ , the first cleaner 5, the second cleaner 6, and the like are also installed in the second group dryer D ₂ and the succeeding Nth dryer group D _n. The brush cleaner 7 is installed with the guide roll 3j facing between the second cleaner 6 and the second cleaner 6.

FIG. 1 is a diagram showing the brush cleaner 7, and a dryer canvas 21 is guided in the direction indicated by the arrow Q in FIGS. 1 and 2 while being guided by the guide roll 3 d. Note that the second dryer group D ₂ and subsequent dryer canvas 22 is also running to FIG Uwaya form Q direction. A long brush body 71 is provided along the width direction of the dryer canvas 21 so as to face the guide roll 3d and in a state in which the tip portion contacts the surface of the dryer canvas 21. A suction pipe 72 as a suction means is installed in the traveling direction of the dryer canvas 21 and downstream of the brush body 71, and the suction port 72 a is opened facing the dryer canvas 21. On the upstream side of the suction port 72a, a baffle plate portion 72b is formed by bending the edge of the suction port 72a toward the upstream side. In addition, an air outlet 73 for blowing air for peeling is opened on the downstream side of the suction port 72a. The air outlet 73 is formed as an air blowing means by a part of the peripheral surface of the air blow pipe 74 and a guide plate 75 arranged to face the peripheral surface.

  The guide plate 75 extends obliquely upward with respect to the traveling direction of the dryer canvas 21 so that the peeling air blown from the outlet 73 is blown to the dryer canvas 21 from a direction opposite to the traveling direction. is there. Further, the suction port 72a is formed by a part of the peripheral surface of the air blow pipe 74, and a part of the peeling air blown out from the air outlet 73 flows along the peripheral surface by the Coanda effect. It reaches the suction port 72a, that is, a part of this peripheral surface is a collection guide portion 77 as a collection guide means.

  Further, the separation air that reaches the air outlet 73 through the air blow pipe 74 passes through the buffer chamber 76 and is blown out from the air outlet 73 through the buffer chamber 76. That is, the peeling air is blown from the discharge port 74a toward the buffer chamber 76 in a direction substantially parallel to the running direction of the dryer canvas 21 on the peripheral surface of the air blow pipe 74, and is blown after being retained in the buffer chamber 76. It blows out from the exit 73.

The operation of the cleaner for the dryer canvas according to the present invention configured as described above will be described below. The first group dryer D ₁ will be described, but the same applies to the second group dryer D ₂ and the other Nth dryer groups D _n .

  The dryer canvas 21 in which the paper P is wound around and pressed against the dryer cylinders 1a to 1f by running in the working area does not proceed to the non-working area from the dryer cylinder 1g and does not act on the paper P. Become. In the dryer canvas 21 traveling in the non-operation area, the upper surface in FIG. 2 is a surface that contacts the paper P when traveling in the operation area. In the course of traveling in the non-operating area, when passing through the portion where the brush body 71 is installed, it is rubbed while being in contact with the brush body 71 while being guided by the guide roll 3d. For this reason, wet paper scraps, paper dust and the like of the paper P adhering when the dryer canvas 21 travels in the working area are scraped off from the surface of the dryer canvas 21. The scraped paper dust and the like move downstream along with the traveling flow of the dryer canvas 21. Since a suction port 72a is opened on the downstream side of the brush body 71, paper dust and the like are sucked from the suction port 72a and discharged through the suction tube 72. Further, at this time, paper dust or the like about to scatter upward is blocked along the baffle plate portion 72b and guided to the suction port 72a.

  Further, when rubbing the brush body 71, residual paper dust or the like remaining on the surface of the dryer canvas 21 is blown off from the surface by the peeling air blown from the blower outlet 73. Since the residual paper dust or the like has been scraped through the brush body 71 first, the adhesion is reduced, and it can be peeled off and blown off relatively easily. The blown paper dust and the like are guided to the suction port 72a along with the flow of the peeling air. At this time, a part of the peeling air blown from the blower outlet 73 receives the Coanda effect and flows along the peripheral surface of the air blow pipe 74 and is guided to the suction port 72a. Are guided to the recovery guide 77 and flow along with the peeling air, and are reliably guided to the suction port 72a and sucked. Therefore, paper dust and the like are removed without being scattered.

  The dryer canvas 21 from which the paper dust and the like have been removed is guided from the guide roll 3g to the dryer cylinder 1a and is used for evaporating moisture from the paper P. In addition, since paper dust and the like have been removed, moisture passes through the dryer canvas 21 to promote evaporation.

  According to the cleaner for a dryer canvas according to the present invention, the paper dust and the like scraped by the brush body is sucked into the suction port disposed on the downstream side of the brush body in the flow direction of the dryer canvas. Removed. Further, since the brush body and the suction port are installed on the same side with respect to the dryer canvas, the installation space is not increased, and in particular, the cleaner for the dryer canvas suitable for installation in an existing dry part is obtained.

D Dry part D ₁ Group 1 dryer D ₂ Group 2 dryer 1 Dryer cylinder
21 Dryer canvas (for first group dryer)
22 Dryer canvas (for second group dryer)
3 Guide roll 7 Brush cleaner
71 Brush body
72 Suction tube
72a Suction port
72b baffle
73 Air outlet
74 Air blow pipe
75 Information board
76 Buffer room
77 Collection guide (collection guide means)

Claims (2)

The dryer canvas is wound around a dryer cylinder while guiding the paper, and is installed on the dryer canvas that is part of the dry part that dries the paper and runs in a non-working area that does not contribute to paper drying. In the dryer canvas cleaner that removes paper dust and the like adhering to the dryer canvas,
A brush body for rubbing the surface of the dryer canvas by running;
A suction means having a suction port opened on the downstream side of the brush body facing the surface of the dryer canvas;
A cleaner for a dryer canvas, comprising air blowing means for blowing peeling air from an oblique direction opposite to the traveling direction of the dryer canvas on the surface of the dryer canvas on the downstream side of the suction means .   The dryer according to claim 1, further comprising: blowing guide means for blowing the peeling air blown from the air blowing means to the surface of the dryer canvas, and recovery guide means for guiding the air to the suction port. Canvas cleaner.

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