JP2003170130A - Cleaning equipment and cleaning method of cloth for paper-making machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To constitute cleaning equipment of cloth for paper-making machine a where stuck materials can be efficiently removed by a low-pressure cleaning liquid. <P>SOLUTION: The cleaning equipment for continuously cleaning the endless belt-cloth 1 while allowing the machine cloth to travel is formed to have a roll 2 having ruggedness to deform the cloth to a corrugated form, a shower head 3 for spraying the cleaning liquid to the cloth in front of the roll and a doctor blade 4 for scraping off the materials stuck to the surface of the cloth behind the roll. More particularly, the shower head to sprays the cleaning liquid toward the neighborhood of a position A where the contact of the cloth with the roll starts. Further, the roll is provided with projected rims extended to its outer peripheral surface in the state of the rims inclining with respect to the circumferential direction and the roll is rotated relatively to the cloth where the projected rims slide on the surface of the cloth. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a papermaking cloth washing apparatus and a washing method for continuously washing an endless belt-shaped papermaking cloth while running.

[0002]

2. Description of the Related Art Cloths such as wires, felts and canvases are used in a paper machine. These papermaking cloths are used for the papermaking machine while the paper machine is in operation. If the additive substance adheres and continues to be used as it is without removing these deposits, the deposits grow to cover the entire surface of the papermaking fabric, and the water-permeability is impaired, and not only the dehydration efficiency decreases, but also The increased load shortens the life of the papermaking fabric, and further causes the inconvenience of lowering the quality of the product. For this reason, it is necessary to wash it appropriately to remove the deposits.

[0003]

However, the cleaning device that has been conventionally used for cleaning the cloth for papermaking has a structure in which the cleaning liquid is sprayed on the cloth for papermaking and the deposits are blown off by the pressure of the cleaning liquid. In this case, since the cleaning liquid collides with the papermaking fabric at a high pressure in this case, it has a great influence on the papermaking fabric and has a disadvantage that the life of the papermaking fabric is shortened. Moreover, when the cleaning liquid collides with the papermaking fabric, a large amount of splash liquid is generated, and this splash liquid not only pollutes peripheral equipment but also drops on wet paper and causes paper breakage, so promptly It is necessary to collect them, which is troublesome in the processing. Further, in the configuration in which the high-pressure cleaning liquid is jetted, there is a disadvantage that the consumption of the cleaning liquid is large, the power cost is required for pressurization, and the operation cost increases due to replacement of the nozzle, which is significantly worn.

The present invention has been devised to solve the above-mentioned problems of the prior art, and its main purpose is to:
It is an object of the present invention to provide a cleaning device and a cleaning method for a papermaking cloth, which is configured to efficiently remove deposits with a low-pressure cleaning liquid.

[0005]

In order to achieve such an object, according to the present invention, as described in claim 1, in a cleaning device for continuously cleaning an endless belt-shaped paper making cloth while running, A roll provided with irregularities on the outer peripheral surface for deforming the fabric for use in a wave shape, a cleaning liquid spraying means for spraying a cleaning liquid on the paper for fabric in front of the roll, and a roll for adhering to the surface of the paper for fabric behind the roll. And a scraping means for scraping off the deposit.

According to this, by deforming the papermaking fabric into a corrugated shape in a state where the cleaning liquid is soaked in, the adhering substances attached to the papermaking fabric can be lifted up, and the adhering substances can be scraped off. Are efficiently removed. Therefore, the cleaning liquid may be adjusted to an appropriate amount and pressure so that a sufficient cleaning liquid can be spread on the papermaking fabric, and a sufficient cleaning effect can be obtained at low pressure. Moreover, since a device having a complicated structure is not necessary and the device can be realized with a relatively simple structure, the manufacturing cost can be reduced.

In the cleaning device, as described in claim 2, the cleaning liquid spraying means can be arranged so as to spray the cleaning liquid toward the vicinity of the contact start position of the papermaking fabric with respect to the roll. . According to this, since the cleaning liquid sprinkled on the surface of the papermaking fabric is immediately pushed into the inside of the papermaking fabric by the rolls, it is possible to suppress the dripping and allow a large amount of the cleaning liquid to permeate the papermaking fabric. Therefore, in combination with the low pressure of the cleaning liquid, waste of the cleaning liquid is reduced and the amount of the cleaning liquid used can be reduced.

In the cleaning device, as described in claim 3, the roll has a ridge extending on the outer peripheral surface in a state inclined with respect to the circumferential direction, and the ridge is formed on the surface of the papermaking fabric. It is possible to adopt a configuration in which the roll is rotated relative to the papermaking fabric so that the paper slides. According to this, the ridges move so as to rub the surface of the papermaking fabric, and the papermaking fabric sways in a wavy manner. Therefore, a kneading washing effect can be obtained, and the washing effect can be further enhanced. Even if the roll is not slid against the papermaking fabric, pressing the papermaking fabric against the roll with appropriate tension causes the papermaking fabric to be deformed into a wavy shape and partially compressed, which results in press washing. The effect is obtained.

Further, according to the present invention, as described in claim 4, in a cleaning method of continuously cleaning the endless belt-shaped papermaking fabric while running, a step of spraying a cleaning liquid on the papermaking fabric, and a papermaking process thereafter. The method includes a step of deforming the fabric for use in a wave shape and a step of scraping off the deposits attached to the surface of the papermaking fabric after that.

According to this, by deforming the papermaking fabric into a corrugated shape in a state where the cleaning liquid is soaked in, the adhering substances attached to the papermaking fabric can be lifted up, and the adhering substances can be scraped off. Are efficiently removed. Therefore, the cleaning liquid may be adjusted to an appropriate amount and pressure so that a sufficient cleaning liquid can be spread on the papermaking fabric, and a sufficient cleaning effect can be obtained at low pressure.

The present invention can be applied to various fabrics used in the papermaking process, but in particular, fabrics to which a large amount of fine fibers, pitch, etc. of paper pulp are attached, that is, a screen process (wire part). It is suitable for the wire used in, and the felt used in the pressing step (press part). Further, it can be applied to a canvas used in a drying process (dry part) and other belts used in a paper machine.

[0012]

DETAILED DESCRIPTION OF THE INVENTION The configuration of the present invention will be described in detail below with reference to the accompanying drawings.

FIG. 1 is a cross-sectional view showing a schematic structure of a paper-making cloth cleaning apparatus according to the present invention. This cleaning device continuously cleans the papermaking fabric 1 while running it in the middle of the running path of the endless belt-shaped papermaking fabric 1 such as felt in the papermaking machine, and the surface (paper forming surface) 1a of the papermaking fabric 1 It removes adhered substances such as fine fibers of paper raw material pulp adhered to, adhesives or other additive substances.

This washing apparatus is provided with a roll 2 provided with irregularities on the outer peripheral surface for deforming the papermaking cloth 1 into a corrugated shape, and a shower head (washing liquid spraying) for spraying the cleaning liquid on the papermaking cloth 1 in front of the roll 2. (Means) 3 and a doctor blade (adhesion scraping means) 4 for scraping off the adhered matter of the papermaking fabric 1 behind the roll 2.

The doctor blade 4 is provided alongside the suction box 5. In the suction box 5, the cleaning liquid contained in the papermaking fabric 1 is sucked to drain the papermaking fabric 1, and at the same time, the doctor blade 4 is used. The deposits scraped off are collected. A saveall 6 is provided below the roll 2, the doctor blade 4, and the suction box 5 to receive and discharge the dropped cleaning liquid.

Further, a roll doctor blade 7 is provided on the roll 2 so as to remove deposits on the roll 2 and keep it in a clean state. Further, here, an auxiliary roll 8 is provided between the roll 2 and the doctor blade 4, and the papermaking fabric 1 is provided from the side opposite to the roll 2.
While pressing the surface 1a of the above against the doctor blade 4,
The holding angle of the papermaking fabric 1 by the roll 2 is set to be large,
The contact time of the papermaking fabric 1 with the roll 2 is set to be long.

The shower head 3 is arranged so as to spray the cleaning liquid from the front toward the vicinity of the contact start position A of the papermaking cloth 1 with respect to the roll 2. Fabric for papermaking 1
Is pressed against the roll 2 with an appropriate tension, and the cleaning liquid sprinkled on the surface of the papermaking fabric 1 is immediately pushed into the inside of the papermaking fabric 1 by the roll 2, so that the liquid dripping is suppressed. It is possible to allow a large amount of cleaning liquid to soak into the papermaking fabric 1. The shower head 3 is appropriately jetted with air to enhance the cleaning effect.

FIG. 2 is a front view of the cleaning device shown in FIG. The shower head 3 has a structure in which the cleaning liquid is ejected in a fan shape, and the cleaning liquid is sprayed substantially uniformly over the entire width of the papermaking fabric 1. This shower head 3
The purpose is to allow the cleaning liquid to soak into the papermaking fabric 1, and unlike the configuration in which the deposits adhering to the papermaking fabric 1 are blown off by the pressure of the cleaning liquid, the cleaning liquid is at a low pressure (for example, 0.3 to 1. 0 MPa) is sufficient, and the liquid amount and the pressure are adjusted to be appropriate so that a sufficient cleaning liquid is spread over the papermaking fabric 1.

The roll 2 is provided with a protrusion 10 extending on the outer peripheral surface in a state of being inclined with respect to the circumferential direction. This ridge 10 is formed in a spiral shape and deforms the papermaking fabric 1 pressed against the roll 2 by tension so that the cross section has a corrugated shape, and thereby the papermaking fabric 1 is partially compressed and pressed. A washing effect is obtained. The surface 1a of the papermaking fabric 1
The roll 2 is rotated relative to the papermaking fabric 1 so that the ridge 10 slides. Therefore, the ridge 10 operates so as to rub the surface of the papermaking fabric 1, and accordingly, the papermaking fabric 1 sways in a wavy manner, functioning similarly to a washing plate to obtain a kneading washing effect. This makes it possible to lift up the adhered matter that is strongly entangled with the fibers of the papermaking fabric 1.

In order to rotate the roll 2 relative to the papermaking cloth 1, for example, in a structure in which the papermaking cloth 1 is rotated (rotated together) as the papermaking cloth 1 is running, rotation resistance is imparted as necessary to make the papermaking cloth. The roll 2 is rotated at a speed lower than the traveling speed of the cloth 1. The roll 2 may be driven by a motor at a speed higher than the traveling speed of the papermaking fabric 1. The ridges 10 are formed symmetrically with the axial center of the roll 2 as a boundary, so that the forces acting on the papermaking fabric 1 from the roll 2 slidingly contacting the papermaking fabric 1 are balanced, and the papermaking fabric 1 is formed. Can be stably driven.

In the main cleaning device thus constructed, in the cleaning liquid spraying process by the shower head 3,
A required amount of the cleaning liquid is supplied to the papermaking fabric 1, and then, in the fabric deformation step by the roll 2, the cleaning liquid is spread over the papermaking fabric 1 and the cleaning liquid is soaked in the papermaking fabric 1.
Is deformed into a corrugated shape so that the deposits entangled with the fibers of the papermaking fabric 1 are lifted up, and most of the deposits attached to the surface of the papermaking fabric 1 are scraped off by a doctor blade 4 scraping process thereafter. Thus, the deposits on the papermaking fabric 1 are efficiently removed. In the scraping step, the pitch firmly attached to the papermaking fabric 1 can also be removed.

In the present embodiment, an example in which a spiral protrusion is provided to form irregularities on the outer peripheral surface of the roll has been shown, but the present invention is not limited to this, and various types of protrusions can be used. The form is possible. For example, as shown in the arrangement pattern of the protrusions in FIG. 3, the protrusions 22 may be provided on the outer peripheral surface of the roll 21 in a lattice-like manner. Further, as shown in FIG. 4, the protrusion 32 may be provided on the outer peripheral surface of the roll 31 in a corrugated manner. In any of these configurations, the ridges 22 and 32 are inclined with respect to the circumferential direction of the rolls 21 and 31, and by operating the ridges 22 and 32 to slide on the papermaking fabric 1, a kneading effect can be obtained. it can.

In addition, in order to form irregularities on the outer peripheral surface of the roll, the protrusions may be provided at appropriate intervals. Further, it is possible to provide not only a convex portion such as a ridge or a protrusion but also a concave portion such as a groove or a hole, or a configuration in which the outer peripheral surface has a corrugated plate cross section.

[0024]

As described above, according to the present invention, since the cleaning liquid requires a relatively low pressure, it is possible to suppress the influence of cleaning on the cloth, and to extend the life of the cloth.
In addition, since the cleaning liquid does not scatter around, it is possible to avoid the inconvenience caused by the treatment of the splash liquid. further,
Since the consumption of the cleaning liquid and the power cost can be reduced, a remarkable effect can be obtained in reducing the operating cost.

[Brief description of drawings]

FIG. 1 is a sectional view showing a schematic configuration of a cleaning apparatus according to the present invention.

FIG. 2 is a front view of the cleaning device shown in FIG.

FIG. 3 is a schematic view showing another aspect of the arrangement pattern of the ridges according to the present invention.

FIG. 4 is a schematic view showing another aspect of the arrangement pattern of the ridges according to the present invention.

[Explanation of symbols]

1 Fabric for papermaking, 1a Surface Two rolls 3 shower heads 4 doctor blade 5 suction box 6 saveall Doctor blade for 7 rolls 8 auxiliary rolls 10 ridges A contact start position

Claims (4)

[Claims] 1. A cleaning device for continuously cleaning an endless belt-shaped paper making cloth while running, comprising: a roll having irregularities on its outer peripheral surface for deforming the paper making cloth into a corrugated shape; and a front part of the roll. 2. A cleaning device, comprising: a cleaning liquid spraying unit that sprays a cleaning liquid onto the papermaking fabric, and a scraping unit that scrapes off an adhering substance adhering to the surface of the papermaking fabric behind the roll. 2. The cleaning device according to claim 1, wherein the cleaning liquid spraying means is arranged so as to spray the cleaning liquid toward the vicinity of a contact start position of the papermaking fabric with respect to the roll. . 3. The papermaking machine according to claim 1, wherein the roll has a ridge extending in an outer peripheral surface in a state of being inclined with respect to the circumferential direction, and the ridge slides on the surface of the papermaking fabric. The cleaning device according to claim 1 or 2, wherein the roll is rotated relative to the cloth for use. 4. A cleaning method for continuously cleaning an endless belt-shaped paper making cloth while running, comprising a step of spraying a cleaning liquid on the paper making cloth, and thereafter deforming the paper making cloth into a wavy shape. A washing method comprising a step and a step of scraping off an adhering substance adhering to the surface of the papermaking fabric.