WO2007145107A1

WO2007145107A1 - Nozzle device, method of imparting chemical using it, and chemical

Info

Publication number: WO2007145107A1
Application number: PCT/JP2007/061425
Authority: WO
Inventors: Hiroshi Sekiya; Akihisa Yamada; Tomohiko Nagatsuka
Original assignee: Maintech Co., Ltd.
Priority date: 2006-06-16
Filing date: 2007-06-06
Publication date: 2007-12-21
Also published as: TWI393588B; TW200806394A; CN101495241B; CN101495241A

Abstract

A nozzle device capable of surely imparting a chemical to a traveling body even in an ultra high-speed paper-making machine and sufficiently suppressing the spattering of the chemical and a method of imparting the chemical using the nozzle device are provided. The nozzle device (100) for imparting a chemical to the traveling body comprises an ejecting nozzle (1) capable of ejecting the chemical, a first spray nozzle (12) positioned on the upstream side of the ejecting nozzle (1) in the traveling direction of the traveling body, and a second spray nozzle (22) positioned on the downstream side of the ejecting nozzle (1) in the traveling direction. The nozzle device is characterized in that both the first spray nozzle (12) and the second spray nozzle (22) can spray air, and the angle formed by the traveling direction of the traveling body and the ejecting direction of the chemical from the ejecting nozzle (1) is 30 to 135°.

Description

Specification

Nozzle device, chemical solution application method using the same, and chemical solution

Technical field

TECHNICAL FIELD [0001] The present invention relates to a nozzle device, a chemical solution application method using the nozzle device, and a chemical solution.

Background art

[0002] Conventionally, in the papermaking industry, it is possible to prevent foreign materials derived from pulp materials from transferring from the paper body to members such as paper machine wires, felts, dryer rolls, canvases, etc. For the purpose of improving the quality, a chemical solution containing a chemical such as a cleaning agent, a pitch control agent, an antifouling agent, or a release agent is applied.

[0003] These chemicals are generally supplied from a nozzle of a nozzle device attached to the paper machine, while the paper machine is in operation! / From the paper body, wire, felt, dryer roll, canvas, etc. It is called “running body”).

However, since the traveling body travels at high speed in the paper machine, an air flow (hereinafter referred to as “associated flow”) is generated near the surface of the traveling body, and the nozzle force is also increased. A phenomenon occurs in which the chemical discharged toward the traveling body is rolled up by the accompanying flow. In this case, not only the chemical solution cannot be sufficiently applied to the traveling body, but also the rolled up chemical solution adheres to the frame, the hood or the like and contaminates the paper machine.

[0005] As an apparatus for preventing such a chemical liquid from rolling up, the present inventors have already formed air curtains on the upstream side and the downstream side of a fluid (chemical liquid) ejection nozzle and sprayed the fluid in the space between them. Propose a fluid scattering prevention device for spraying fluids!

According to this apparatus, in the conventional paper machine where the paper making speed was relatively low, most of the chemical solution reached the traveling body, and the above problems could be solved.

[0006] However, in recent years, paper machines have become very high-speed, and those having a paper-making speed of 1500 to 2000 mZ are now appearing.

In such an ultra-high speed paper machine, the accompanying flow around the traveling body is extremely strong in both wind speed and wind pressure, so the above device cannot sufficiently apply the chemical to the traveling body, and the scattering of the chemical is also sufficient. I can't suppress it. Rather, the accompanying flow around the traveling body is greatly disturbed by the air curtain and tends to generate turbulence.

[0007] On the other hand, a spray nozzle for spraying a liquid (chemical solution) and an air jet port for jetting an air flow are provided, and the air flow is applied to the sprayed liquid by the spray nozzle force. A spraying device and a spraying device for spraying a liquid, in which a spray nozzle and an airflow spray port are arranged so that the sprayed liquid can be sprayed on the traveling body by spraying the airflow from the spraying port A method is disclosed (see Patent Document 2 or 3).

According to this liquid spray application device, it is possible to apply the liquid in a state where the winding up to the downstream side is suppressed even in the accompanying flow having a large wind speed and pressure.

Patent Document 1: Japanese Utility Model Publication No. 01-152762

Patent Document 2: Japanese Patent Laid-Open No. 2003-251259

Patent Document 3: Japanese Patent Application Laid-Open No. 2004-058031

Disclosure of the invention

Problems to be solved by the invention

[0008] However, since the liquid spray application device described in Patent Documents 2 and 3 described above cannot sufficiently suppress the accompanying flow, the liquid cannot be sufficiently applied to the traveling body, and the liquid is sufficiently scattered. Cannot be suppressed.

In particular, when liquid is applied to the traveling body by reciprocally scanning one nozzle device, an air current is generated not only in the accompanying flow but also when the nozzle device is reciprocated, so that the liquid is flown by the air flow jetting force. Simply accelerating and spraying the vehicle is not enough.

On the other hand, in addition to further increasing the speed of paper machines, demands for increasing paper strength, preventing contamination of members, and improving paper separation from members are increasing.

[0010] The present invention has been made in view of the above circumstances, and it is possible to reliably apply a chemical solution to a running body even in an ultra-high speed paper machine and the like, which can sufficiently suppress the scattering of the chemical solution. It is an object of the present invention to provide a chemical device, a method for applying a chemical solution using the device, and a chemical solution. Means for solving the problem

[0011] The inventors of the present invention made extensive studies to solve the above-mentioned problems. As a result, the chemical solution was applied to the traveling body at a predetermined angle, and the upstream side and the downstream side of the discharge nozzle with respect to the traveling direction of the traveling body It has been found that the above problem can be solved by providing the first spray nozzle and the second spray nozzle that spray air to the side, and the present invention has been completed.

[0012] That is, the nozzle device of the present invention is (1) a nozzle device for applying a chemical liquid to a traveling body, and a discharge nozzle capable of discharging a chemical liquid and a traveling direction of the traveling body. A first spray nozzle located on the upstream side of the discharge nozzle, and a second spray nozzle located on the downstream side of the discharge nozzle with respect to the traveling direction of the traveling body, the first spray nozzle and The second spray nozzle cover is a nozzle device that can spray air even when there is a gap, and the angle between the traveling direction of the traveling body and the discharge direction of the chemical at the discharge nozzle is 30 to 135 degrees.

[0013] The present invention resides in the nozzle device according to (1), wherein (2) the air blowing angle in the first blowing nozzle and the Z or second blowing nozzle can be adjusted.

[0014] In the present invention, (3) the angle formed by the traveling direction of the traveling body and the air blowing direction of the first blowing nozzle is 45 to 90 degrees, and the traveling direction of the traveling body and the second blowing direction are In the nozzle device according to the above (1), the angle formed by the air blowing direction at the attachment nozzle is 45 to 90 degrees.

[0015] The present invention resides in (4) the nozzle device according to (1), wherein the traveling direction and the discharge direction are on the same plane, and the plane is perpendicular to the traveling body.

[0016] The present invention resides in the nozzle device according to (1), wherein (5) the nozzle port of the discharge nozzle has a slit shape.

[0017] The present invention resides in (6) the nozzle device according to the above (1), wherein the chemical solution contains a cleaning agent, a pitch control agent, a contamination inhibitor or a release agent.

The present invention resides in (7) the nozzle device according to the above (1), wherein the traveling body is a paper body or a canvas for drying the paper body.

[0019] The present invention is (8) a method for applying a chemical to a paper body provided in a paper machine or a canvas for drying the paper body, wherein the paper machine is claimed in claims 1 to The nozzle device according to any one of 7 is provided, and a chemical is applied to the paper body or canvas by the discharge nozzle and air is blown by the first spray nozzle and the second spray nozzle. It lies in the method of applying chemicals to be attached. [0020] In the present invention, (9) scanning means for reciprocating the nozzle device is attached to the paper machine, and the scanning direction and the traveling direction of the paper body or canvas are orthogonal to each other, and the traveling direction and the ejection direction Are on the same plane, and the plane is perpendicular to the traveling body.

[0021] The present invention provides (10) a wet paper strength agent, a cleaning agent, a pitch control agent, an antifouling agent, which is applied using the nozzle device according to any one of (1) to (7) above. It exists in chemicals that are mold release agents.

[0022] The present invention resides in (11) the chemical solution according to the above (10), which has a viscosity of 500 cps or less.

The invention's effect

In the nozzle device of the present invention, the angle formed by the traveling direction of the traveling body and the discharge direction of the chemical liquid at the discharge nozzle is 30 to 135 degrees, so that the chemical liquid can be uniformly applied to the traveling body.

That is, at this time, in the nozzle device, the air sprayed from the first spray nozzle is sprayed between the accompanying flow generated by the traveling of the traveling body and the chemical liquid discharged from the discharge nozzle.

For this reason, in the said nozzle apparatus, the rolling-up of the chemical | medical solution by an accompanying flow is suppressed.

On the other hand, a slight accompanying flow generated between the air sprayed from the first spray nozzle and the chemical liquid discharged from the discharge nozzle is not suppressed by the first spray nozzle. Therefore, the accompanying flow winds up the chemical liquid discharged from the discharge nozzle. However, in the nozzle device, the second blowing nozzle force blown air suppresses the lifting.

[0025] Therefore, according to the nozzle device of the present invention, the chemical solution can be surely applied to the traveling body even in an ultra-high-speed paper machine, and the scattering of the chemical solution can be sufficiently suppressed.

[0026] In the nozzle device, when the air spray angle in the first spray nozzle and Z or the second spray nozzle can be adjusted, the chemical liquid is applied to the traveling body. It can be applied more reliably, and the scattering of chemicals can be more reliably suppressed.

[0027] In this case, the traveling direction of the traveling body and the method of blowing air at the first blowing nozzle It is preferable that the angle formed by the direction is 45 to 90 degrees, and the angle formed by the traveling direction of the traveling body and the air blowing direction in the second spray nozzle is 45 to 90 degrees.

[0028] In the nozzle device, when the traveling direction and the discharge direction are on the same plane and the plane is perpendicular to the traveling body, the chemical solution is uniformly applied to the width direction of the traveling body. be able to.

[0029] In the above nozzle device, if the nozzle opening of the discharge nozzle has a slit shape! /, The area where the chemical solution can be applied at once increases, so the number of nozzle devices can be reduced. . In addition, even when the chemical solution is applied while moving the nozzle device in the vertical direction with respect to the traveling body, the nozzle device of the present invention has a large area that can be applied with the chemical solution at a time, and therefore, at a relatively low speed. Can be moved.

[0030] In the above nozzle device, when the chemical solution contains a cleaning agent, a pitch control agent, a contamination inhibitor or a release agent, the chemical solution can be reliably applied to the traveling body.

[0031] It is more preferable that the traveling body is a paper body or a canvas for drying the paper body in the nozzle device.

[0032] A method for applying a chemical solution according to the present invention includes the nozzle device described above, and a chemical solution is applied to a paper body or canvas by a discharge nozzle, and a first spray nozzle and a second spray nozzle. Since air is blown by the above, even if it is applied to an ultra-high speed paper machine, the chemical solution can be reliably applied to the paper body or the cannula, and the scattering of the chemical solution can be sufficiently suppressed.

[0033] In the chemical solution application method, scanning means for reciprocally scanning the nozzle device is attached to the paper machine. The scanning direction is orthogonal to the traveling direction of the paper body or canvas, and the traveling direction and the ejection direction are If they are on the same plane and the plane is perpendicular to the traveling body, even if the number of nozzle devices is one, the chemical solution can be reliably applied to the paper body or canvas by performing reciprocating scanning.

When the number of nozzle devices is one, maintenance is easy and cost is advantageous.

[0034] The chemical solution of the present invention is a cleaning agent, pitch control agent, antifouling agent, or release agent, and is applied using the nozzle device, so that the chemical solution can be reliably applied to the traveling body. . In addition, it can provide more reliably that the viscosity of the said chemical | medical solution is 500 cps or less.

In addition, the traveling body to which the chemical solution is applied can surely exhibit the function based on the applied chemical solution.

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings as necessary.

In the drawings, the same elements are denoted by the same reference numerals, and redundant description is omitted. In addition, positional relationships such as up, down, left and right are based on the positional relationships shown in the drawings unless otherwise specified.

Further, the dimensional ratios in the drawings are not limited to the illustrated ratios.

FIG. 1 is a top view showing an embodiment of the nozzle device of the present invention.

As shown in FIG. 1, the nozzle device 100 according to the present embodiment includes a discharge nozzle 1 capable of discharging a chemical solution, and a first spray nozzle 12 and a second spray nozzle arranged in parallel with the discharge nozzle 1. 2 and 2.

The first spray nozzle 12 and the second spray nozzle 22 are capable of spraying air even when V is shifted.

[0037] The nozzle device 100 according to the present embodiment is used for applying a chemical solution from the discharge nozzle 1 to a traveling body (not shown).

For example, when a traveling body (not shown) travels in the direction of arrow A (hereinafter referred to as “traveling direction A”), air is first blown from the first spray nozzle 12 to a predetermined position of the traveling body. Then, the chemical solution is applied from the discharge nozzle 1 and finally the air is sprayed from the second spray nozzle 22.

That is, in the nozzle device 100, the first spray nozzle 12 is located upstream of the discharge nozzle 1 with respect to the traveling direction A of the traveling body, and the second spray nozzle 22 is the traveling body. The discharge nozzle 1, the first spray nozzle 12, and the second spray nozzle 22 are located in a line with respect to the travel direction A. It is arranged.

[0039] Specifically, the discharge nozzle 1 has a hemispherical shape, and a slit 3 Is provided.

The striking slit 3 has a line shape extending in a direction perpendicular to the traveling direction A.

Accordingly, the chemical liquid discharged from the powerful slit 3 is discharged in a fan shape (in a divergent manner) with respect to the traveling body.

[0040] The discharge nozzle 1 is provided at substantially the center of the upper surface of the rectangular parallelepiped discharge nozzle body 2.

The discharge nozzle body 2 is connected to arms 5a and 5b for fixing the discharge nozzle body 2 at both ends.

A supply pipe for sending a chemical solution to the discharge nozzle 1 is provided inside the discharge nozzle body 2 and the arm portions 5a and 5b.

In addition, the supply pipe which is powerful is mentioned later.

[0041] A spray nozzle body 10 having a U-shape is fitted to the lower end of the discharge nozzle body 2.

In other words, the spray nozzle body 10 is separate from the discharge nozzle body 2 and can be attached to and detached from the discharge nozzle body 2.

The first spray nozzle 12 and the second spray nozzle 22 having a hemispherical shape are formed at the upper ends of both sides of the spray nozzle body 10.

Line-shaped slits 13 and 23 are provided above the first spray nozzle 12 and the second spray nozzle 22 in the same manner as the slit 3 described above.

The slits 13 and 23 have a line shape extending in a direction perpendicular to the traveling direction A, and the air blown from the powerful slits 13 and 23 is blown into the fan in a fan shape. It will be.

[0043] In the discharge nozzle 1, the first spray nozzle 12, and the second spray nozzle 22, the line-shaped slits 3, 13, and 23 provided in the discharge nozzle 1, the first spray nozzle 12, and the second spray nozzle 22 are all in the traveling direction A of the traveling body. The lines extend in the vertical direction and are substantially parallel to each other.

Here, the distance from the center of the slit 3 of the discharge nozzle 1 to the center of the slit 13 of the first spray nozzle 12 is preferably 7 to 30 mm, and preferably 7 to 20 mm. More preferred Yes.

The distance from the center of the slit 3 of the discharge nozzle 1 to the center of the slit 23 of the second spray nozzle 22 is preferably 7 to 30 mm, more preferably 7 to 20 mm. The distance means a distance in a plane perpendicular to the discharge direction of the chemical liquid.

FIG. 2 is a front view of the nozzle device shown in FIG. 1 as viewed from the upstream side with respect to the traveling direction of the traveling body.

As shown in FIG. 2, in the nozzle device 100 according to the present embodiment, a chemical solution supply pipe 8a for supplying a chemical solution to the discharge nozzle body 2 is connected to the arm portion 5a, and the arm portion 5b A discharge air supply pipe 8b for supplying air for discharging the chemical liquid is connected.

Thereby, the chemical liquid is discharged from the discharge nozzle 1 together with the air.

A blowing air supply pipe 7 for supplying air blown from the first blowing nozzle 12 and the second blowing nozzle 22 is connected to the lower end of the blowing nozzle body 10.

That is, the air supplied from the blowing air supply pipe 7 is blown from the first blowing nozzle 12 and the second blowing nozzle 22.

FIG. 3 is a cross-sectional view taken along the line I I of the nozzle device shown in FIG.

As shown in FIG. 3, in the nozzle device 100 according to the present embodiment, a chemical liquid flow path S1 is formed inside the arm portion 5a, and a discharge air flow path S2 is formed inside the arm portion 5b. Has been.

[0048] The chemical liquid supplied from the chemical liquid supply pipe 8a flows through the inside of the chemical liquid supply pipe 8a and is sent to the chemical liquid flow path S1 communicating with the chemical liquid supply pipe 8a.

Then, the chemical liquid is sent from the chemical liquid flow path S 1 to the discharge nozzle body 2.

On the other hand, the air supplied from the discharge air supply pipe 8b flows through the inside of the discharge air supply pipe 8b and is sent to the discharge air flow path S2 communicated with the discharge air supply pipe 8b.

Then, the air is sent from the discharge air flow path S2 to the discharge nozzle body 2.

[0049] The chemical solution and air sent to the discharge nozzle body 2 are mixed in the discharge nozzle 1. And discharged from the slit 3.

At this time, the discharged chemical liquid is accelerated by the momentum of the discharged air.

FIG. 4 is a cross-sectional view taken along the line II-II of the nozzle device shown in FIG.

As shown in FIG. 4, in the nozzle device 100 according to the present embodiment, the air supplied from the blowing air supply pipe 7 is blown air flow path S3 inside the blowing nozzle body 10 communicated with the blowing air supply pipe 7. To be sent to.

[0051] The sent air is divided into two parts inside the spray nozzle body 10, and is sent to the first spray nozzle 12 and the second spray nozzle 22, respectively.

The sent air is blown to the traveling body from the slit 13 of the first blowing nozzle 12 and the slit 23 of the second blowing nozzle 22.

[0052] At this time, the air blown from the first blowing nozzle 12 and the second blowing nozzle 22 both have a predetermined angle with respect to the discharge direction of the chemical solution in the discharge nozzle 1. Be sprayed on.

That is, the first spray nozzle 12 and the second spray nozzle 22 are connected to the spray nozzle body 10 in an inclined state.

[0053] The nozzle device 100 according to the present embodiment is arranged so as to have a predetermined angle with respect to the traveling body.

That is, the chemical liquid discharged from the nozzle device 100 is applied in a state having a predetermined angle with respect to the traveling body.

FIG. 5 is an explanatory diagram for explaining the angle between the chemical solution discharged from the nozzle device cover according to the present embodiment and the traveling body.

As shown in FIG. 5, in the nozzle device 100 according to the present embodiment, the angle θ 1 formed by the traveling direction A of the traveling body and the discharge direction D1 of the chemical liquid in the discharge nozzle 1 is 30 to 135 degrees, and 30 to 90 The degree is preferably 30 to 60 degrees.

[0055] If the angle 01 between the traveling direction A of the traveling body and the discharge direction D1 of the chemical liquid at the discharge nozzle 1 is less than 30 degrees, the discharged chemical liquid tends not to be sufficiently applied to the traveling body. When the angle θ 1 exceeds 90 degrees, compared to the case where the angle θ 1 is within the above range, the chemical discharged by the accompanying flow tends to be lifted and tends to be scattered. At this time, in the nozzle device 100, the air sprayed from the first spray nozzle 12 is sprayed between the accompanying flow generated by the traveling of the traveling body and the chemical liquid discharged from the discharge nozzle 1. It will be.

For this reason, the winding-up of the chemical | medical solution by an accompanying flow is suppressed.

[0057] Note that a slight accompanying flow generated between the air sprayed from the first spray nozzle 12 and the chemical liquid discharged from the discharge nozzle 1 is suppressed by the first spray nozzle 12. Absent.

Therefore, the accompanying flow rolls up the chemical liquid discharged from the discharge nozzle 1. However, in the nozzle device 100, the air blown from the second blowing nozzle 22 suppresses the lifting.

[0058] The angle 0 2 between the traveling direction A of the traveling body and the air blowing direction D2 of the first blowing nozzle 12 is 45 to 90 degrees, and preferably 60 to 90 degrees.

[0059] When the angle Θ2 formed by the traveling direction A of the traveling body and the air blowing direction D2 of the first blowing nozzle 12 is less than 45 degrees, the angle Θ2 is within the above range. In comparison, there is a tendency that the wake cannot be sufficiently blocked, and when the angle Θ 2 exceeds 90 degrees, the angle is blown from the first blowing nozzle 12 compared to the case where the angle is within the above range. The accompanying flow generated between the air and the chemical liquid discharged from the discharge nozzle 1 becomes large, and the discharged chemical liquid tends to be scattered.

[0060] The angle Θ3 formed by the traveling direction A of the traveling body and the air blowing direction D3 in the second blowing nozzle 22 is 45 to 90 degrees, and preferably 60 to 90 degrees.

[0061] When the angle Θ 3 formed by the traveling direction A of the traveling body and the air blowing direction D3 of the second blowing nozzle 22 is less than 30 degrees, the angle Θ 3 is within the above range. In comparison, the slight chemical flow generated between the air sprayed from the first spray nozzle 12 and the chemical liquid discharged from the discharge nozzle 1 tends to raise the discharged chemical liquid easily. Yes, when the angle Θ 3 exceeds 90 degrees, compared to the case where the angle Θ 3 is within the above range, the chemical liquid to be raised tends to be not sufficiently suppressed.

Therefore, when the angles 0 1, Θ 2, and Θ 3 are both within the above range, the chemical solution can be more reliably applied to the traveling body, and the scattering of the chemical solution can be more reliably suppressed. [0063] In the nozzle device according to the present embodiment, it is preferable that the distance L from the tip of the discharge nozzle 1 of the nozzle device 100 to the intersection of the liquid discharge direction D1 and the traveling body is 100 to 120 mm.

In this case, even in an ultra-high speed paper machine or the like, the chemical solution can be more reliably applied to the traveling body, and the scattering of the chemical solution can be more sufficiently suppressed.

[0064] Further, it is preferable that the traveling direction A and the discharge direction D1 are on the same plane, and that the plane is perpendicular to the traveling body! /.

In this case, the chemical solution can be applied uniformly in the width direction of the traveling body.

In the nozzle device according to the present embodiment, the angles Θ 2 and Θ 3 for blowing air from the first blowing nozzle 12 and the second blowing nozzle 22 can be appropriately adjusted within the above range. Yes.

The means for changing the angles Θ 2 and Θ 3 is not particularly limited. For example, the first spray nozzle 12 and the second spray nozzle 22 can be attached to and detached from the spray nozzle main body 10, The spray nozzle 12 and the second spray nozzle 22 may be replaced with spray nozzles having slits formed at the positions where the angles Θ 2 and Θ 3 change.

[0066] (A) and (B) of FIG. 6 are front views showing examples of spray nozzles of the nozzle device according to the present embodiment.

As shown in FIG. 6 (A), for example, the first and second spray nozzles whose slits are in the upper left direction are connected to the slits as shown in FIG. It can be replaced with a first spray nozzle and a second spray nozzle that are oriented in the upper right direction. The spray nozzle body 10 may be replaced with another spray nozzle body in which a spray nozzle having slits formed at positions where the angles Θ 2 and Θ 3 change is fixed.

FIG. 7 is a perspective view schematically showing an example in which the nozzle device according to this embodiment is used in a paper machine.

As shown in FIG. 7, the paper machine 50 has a rotatable drum 45, and a running body 40 is arranged on the drum 45.

The traveling body 40 travels in the direction of arrow A based on the rotation of the drum 45. A scanning unit 30 is fixed above the drum 45.

A driving device 43 that reciprocates in the length direction of the scanning means 30 is attached to the scanning means 30, and the nozzle device 100 described above is directed to the traveling body 40 in the powerful driving device 43. It is attached so that the chemical solution can be discharged.

At this time, the nozzle device 100 is attached by adjusting the angle between the traveling direction A of the traveling body and the discharge direction of the chemical liquid so that the discharged chemical liquid is sufficiently applied to the traveling body 40.

[0069] At this time, scanning means for reciprocally scanning the nozzle device is attached to the paper machine, and the direction of travel and the direction of travel of the paper body or canvas are orthogonal to each other, and the travel direction and the discharge direction are the same surface. It is preferable that the surface is above and the surface is perpendicular to the traveling body.

[0070] While the traveling body 40 is traveling in the traveling direction A, the nozzle device 100 is reciprocated together with the driving device 43, and the chemical solution is discharged from the nozzle device 100 toward the traveling body 40. The body 30 is given chemicals.

At this time, the chemical is also applied to the discharge nozzle force of the nozzle device 100, and air is sprayed by the first spray nozzle and the second spray nozzle.

Therefore, according to the method for applying a chemical solution, since the above-described nozzle device is used, the chemical solution can be reliably applied to the traveling body even with an ultra-high speed paper machine, and the chemical solution is also scattered. It can be suppressed sufficiently.

[0072] Further, in the nozzle device 100, the nozzle port of the discharge nozzle has a slit shape! This increases the area where the chemical solution can be applied at once.

Therefore, even if the number of nozzle devices is one as in the present embodiment, the chemical solution can be applied sufficiently corresponding to the high-speed rotation of the traveling body.

[0073] At this time, it is preferable that the scanning direction of the nozzle device 100 and the traveling direction of the traveling body 40 be orthogonal to each other.

In this case, the chemical liquid can be reliably applied to the traveling body by discharging the chemical liquid toward the traveling body while scanning the nozzle device 100. Further, in the present embodiment, since there is one nozzle device 100, maintenance of the nozzle device 100 is easy, which is advantageous in terms of cost.

[0075] Examples of the traveling body include a paper body, a wire, a felt, a dryer roll, and a canvas.

Among these, it is preferable to use the paper body or a canvas for drying the paper body.

In general, a paper body and a canvas in a paper machine travel at high speed, so that the effect of the nozzle device of the present invention can be further exhibited.

[0076] The chemical solution is preferably a cleaning agent, a pitch control agent, an antifouling agent or a release agent.

In this case, the chemical solution can be reliably applied to the traveling body.

[0077] The viscosity of the chemical solution is preferably 500 cps or less at room temperature (25 ° C).

When the viscosity exceeds 500 cps, compared to the case where the viscosity is within the above range, the scattered chemical liquid adheres to the nozzle opening of the discharge nozzle and the slit of the spray nozzle, and the solid matter contained in the chemical liquid clogs them. There is a risk of getting.

In this case, the chemical solution is not sufficiently discharged, or the spray nozzle is not sufficiently functioned, so that the chemical solution cannot be sufficiently applied to the traveling body, and scattering tends to occur.

[0078] The viscosity is more preferably 1 to 200 cps.

Therefore, the function based on the chemical | medical solution provided can be exhibited reliably.

[0079] The ratio of the solid contained in the chemical solution is preferably 50% by mass or less, more preferably 0.1 to 50% by mass.

In this case, it is possible to suppress the scattered chemical liquid from adhering to the nozzle opening of the discharge nozzle or the slit of the spray nozzle and clogging the solid matter contained in the chemical liquid.

[0080] While the preferred embodiments of the present invention have been described above, the present invention is not limited to the above embodiments.

For example, in the nozzle device 100 according to the above embodiment, the discharge nozzle 1 and the first nozzle The force in which the spray nozzle and the second spray nozzle are arranged in a line with respect to the direction of travel A are not necessarily in a line.

In the nozzle device 100, the spray nozzle body 10 and the discharge nozzle body 2 are separate, but they may be integrated.

[0083] Also, the discharge nozzle 1, the first spray nozzle, and the second spray nozzle have a hemispherical shape, but they may have a square shape, a triangular shape, or the like. There are no particular restrictions on the form of force.

[0084] The nozzle device according to the above embodiment can be used for food processing, fiber processing and the like in addition to the paper machine.

Further, in the example in which the nozzle device according to the present embodiment described above is used in a paper machine, one nozzle device 100 is attached to the paper machine. Multiple may be attached to.

FIG. 9 is a perspective view schematically showing another example in which the nozzle device according to the present embodiment is used in a paper machine.

As shown in FIG. 9, in the paper machine, a plurality of driving devices 43 that reciprocate in the length direction of the scanning means 30 are attached to the scanning means 30, and the nozzle device 100 is attached to each driving device 43. However, it may be attached so that the chemical solution is discharged by the force applied to the traveling body 40.

FIG. 10 is a top view schematically showing another example in which the nozzle device according to the present embodiment is used in a paper machine.

As shown in FIG. 10, a plurality of nozzle devices 100 are attached to the main body 70! /, Or even! /. That is, when this is used in a paper machine, the chemical solution is simultaneously discharged from the plurality of nozzle devices 100 attached to the main body 70, and therefore the reciprocating motion of the nozzle device 100 is unnecessary. The main body 70 includes a blown air supply pipe, a chemical liquid supply pipe, and a discharge air supply pipe (not shown).

Also, not shown! The traveling body travels in the direction of arrow A (traveling direction).

Example

[0088] Hereinafter, a method for applying a chemical solution using the nozzle device of the present invention will be specifically described. Akira is not limited to these.

[Example 1]

As shown in FIG. 8, an acrylic plate 60 with an air knife 62 placed on one end is placed, and from the tip of the discharge nozzle 1 of the nozzle device 100, a chemical solution (Duscreen R409S, mold release agent, viscosity 3cps, Mentec Co., Ltd. The nozzle device 100 was installed so that the distance L to the intersection of the discharge direction D1 and the acrylic plate 60 was 10 mm.

The nozzle device 100 is installed so that the first blowing nozzle 12 is positioned upstream of the wind sent from the air knife 62.

At this time, the angle 01 between the acrylic plate 60 and the discharge direction D1 of the chemical solution at the discharge nozzle 1 is set to 45 degrees, and the air blowing direction at the acrylic plate 60 and the first spray nozzle 12 The angle Θ2 made by D2 was set to 60 degrees, and the angle Θ3 made by the air blowing direction D3 of the acrylic plate 60 and the second blowing nozzle 22 was made 45 degrees.

[0091] Then, the air knife 62 sends wind at a wind speed of 16.6 mZs, and the chemical solution is discharged from the discharge nozzle 1 of the nozzle device 100, and the air is discharged from the first spray nozzle 12 and the second spray nozzle 22. Sprayed.

The discharge condition of the chemical solution from the discharge nozzle 1 was 0. IMPa, and the discharge amount was 20 mlZmiπ.

The air blowing conditions from the first blowing nozzle 12 and the second blowing nozzle 22 were 0.5 MPa.

[Examples 2 to 19 and Comparative Examples 1 and 2]

Except that the angles 0 1, Θ 2 and Θ 3 were changed to the angles (unit: degrees) as shown in Table 1, the chemical solution was discharged from the discharge nozzle 1 of the nozzle device 100 in the same manner as in Example 1, and the first Air was sprayed from the spray nozzle 12 and the second spray nozzle 22.

[0093] [Table 1] Angle 0 1 Angle 0 2 Angle 0 3 Example 2 3 0 6 0 4 5

Example 3 4 5 6 0 4 5

Example 4 1 3 5 6 0 4 5

Example 5 4 5 4 5 4 5

Example 6 4 5 4 5 6 0

Example 7 4 5 4 5 7 5

Example 8 4 5 4 5 9 0

Example 9 4 5 6 0 6 0

Example 1 0 4 5 6 0 7 5

Example 1 1 4 5 6 0 9 0

Example 1 2 4 5 7 5 4 5

Example 1 3 4 5 7 5 6 0

Example 1 4 4 5 7 5 7 5

Example 1 5 4 5 7 5 9 0

Example 1 6 4 5 9 0 4 5

Example 1 4 5 9 0 6 0

Example 1 8 4 5 9 0 7 5

Example 1 9 4 5 9 0 9 0

Comparative Example 1 1 5 6 0 4 5

Comparative Example 2 1 5 0 6 0 4 5

[0094] [Evaluation method of nozzle device]

The application width (unit: cm) of the chemical solution applied to the acrylic plate was measured.

Here, the application width of the chemical solution refers to the length of the applied chemical solution in a direction perpendicular to the flow of air sent from the air knife 62.

Table 2 shows the results obtained.

[0095] [Table 2] Application width Application width Application width Example 1 1 0 Example 8 1 0 Example 1 5 1 2 m 2 8 Example 9 7 Example 1 6 5 Example 3 1 0 Weaving example 1 0 1 4 Example 1 7 1 0

H¾ Example 4 1 2 Example 1 1 1 2 Example 1 8 1 2 Example 5 4 Male Example 1 2 6 Example 1 9 1 2 Example 6 9 Example 1 3 1 0 Comparative Example 1 3 Example 7 1 0 Example 1 4 1 2 Comparative Example 2 3

[0096] As is apparent from Table 2, Examples 1 to 19 using the nozzle device according to the present invention had a sufficient amount of chemical solution compared with Comparative Examples 1 and 2 not according to the present invention. It was found that can be granted.

In particular, it was shown that the implementation f row 10 in which 0 1 was 45 degrees, 0 2 was 60 degrees, and 0 3 was 75 degrees!

[0097] From the above results, according to the nozzle device of the present invention, it is possible to reliably apply the chemical solution to the running body even in an ultra-high speed paper machine or the like, and to sufficiently suppress the scattering of the chemical solution. confirmed.

[0098] [Method for evaluating chemicals]

(Adhesion of chemicals)

Prepare WS4052 (wet paper strength agent, solid 30% by mass, viscosity 500cps, manufactured by PMC), and adjust viscosity with water or thickener to 10, 100, 200, 400, 500, 600, 1000 (cps) 〖 This was adjusted to obtain a chemical solution.

These were set in the nozzle device of Example 1 and continuously discharged for 1 week or 6 weeks, and the state of the nozzle device was visually evaluated.

[0099] Such evaluation is “A” when there is no solid matter attached to the nozzle device, “B” when there is a slight amount of solid matter attached to the nozzle device, and much solid matter attached to the nozzle device. “C” was accepted.

Further, in the same manner as described above, the application width (unit: cm) after continuous discharge for 1 week or 6 weeks was measured. The results obtained are shown in Table 3.

[0100] [Table 3]

[0101] From the results in Table 3, when the viscosity of the chemical solution is 500 cps or less, particularly preferably 200 cps or less, the chemical solution can be reliably applied to the traveling body, and the chemical solution is reattached to the nozzle mouth. It has been proved that solid matter can be reliably suppressed from adhering to the surface.

Industrial applicability

[0102] The nozzle device of the present invention applies chemicals containing chemicals such as cleaning agents, pitch control agents, antifouling agents, mold release agents, etc. to parts such as paper machine wires, felts, dryer rolls and canvases. Used as a device for applying.

According to the nozzle device of the present invention, even in an ultra-high speed paper machine or the like, a chemical solution can be reliably applied to the traveling body, and scattering of the chemical solution can be sufficiently suppressed.

Brief Description of Drawings

FIG. 1 is a top view showing an embodiment of a nozzle device of the present invention.

[FIG. 2] FIG. 2 is a front view of the nozzle device shown in FIG. 1 as viewed from the upstream side with respect to the traveling direction of the traveling body.

FIG. 3 is a cross-sectional view taken along line II of the nozzle device shown in FIG.

FIG. 4 is a cross-sectional view taken along line II-II of the nozzle device shown in FIG.

FIG. 5 is an explanatory diagram for explaining an angle between a chemical solution discharged from the nozzle device according to the present embodiment and a traveling body.

FIG. 6 (A) and FIG. 6 (B) are front views showing examples of spray nozzles of the nozzle device according to the present embodiment.

FIG. 7 is a perspective view schematically showing an example in which the nozzle device according to the present embodiment is used in a paper machine. FIG.

FIG. 8 is a schematic view showing a test apparatus used in Examples.

Explanation of symbols

1 ... Discharge Nozzle

2 "• Discharge nozzle body

3, 13, 23 ...

5a, 51ν ·· arm

7 · Blowing air supply pipe

8a- ·· Chemical supply pipe

8b -... Discharge air supply pipe

10 ··· Blown nozzle body

12 ... 1st spray nozzle

22 ··· Second spray nozzle

30 ... Scanning means

40 ··· Running body

43 ··· Driver

45 ... Drum

50 ··· Paper machine

60 ... Acrylic board

62 ... Air knife

70 • Body

100 ..Nozzle device

• · Run direction

Dl- ··· Discharge direction of chemical

Claims

The scope of the claims

[1] A nozzle device for applying a chemical to a traveling body,

A discharge nozzle capable of discharging the chemical solution;

A first spray nozzle located upstream of the discharge nozzle with respect to the traveling direction of the traveling body;

A second spray nozzle located on the downstream side of the discharge nozzle with respect to the traveling direction of the traveling body;

With

Both the first spray nozzle and the second spray nozzle can spray air,

The nozzle device characterized in that an angle formed by a traveling direction of the traveling body and a discharge direction of the chemical solution at the discharge nozzle is 30 to 135 degrees.

[2] The nozzle device according to [1], wherein an air spray angle in the first spray nozzle and Z or the second spray nozzle is adjustable.

[3] The angle formed by the traveling direction of the traveling body and the air blowing direction of the first spray nozzle is 45 to 90 degrees, and the traveling direction of the traveling body and the second spray nozzle are The nozzle device according to claim 1, wherein an angle formed by the air blowing direction is 45 to 90 degrees.

4. The nozzle device according to claim 1, wherein the traveling direction and the discharge direction are on the same plane, and the surface is perpendicular to the traveling body.

5. The nozzle device according to claim 1, wherein the nozzle device has a nozzle loci slit shape.

6. The nozzle device according to claim 1, wherein the chemical solution includes a cleaning agent, a pitch control agent, a contamination preventive agent, or a release agent.

7. The nozzle device according to claim 1, wherein the traveling body is a paper body or a canvas for drying the paper body.

[8] An application method for applying a chemical solution to a paper body provided in a paper machine or a cannula for drying the paper body, The paper machine includes the nozzle device according to any one of claims 1 to 7, wherein the chemical liquid is applied to the paper body or the canvas by the discharge nozzle and the first spray nozzle. And a method of applying a chemical solution, characterized in that air is blown by the second blowing nozzle.

[9] Scanning means for reciprocally scanning the nozzle device is attached to the paper machine, and the scanning direction is orthogonal to the traveling direction of the paper body or the canvas, and the traveling direction and the discharge direction are 9. The method for applying a chemical solution according to claim 8, wherein the medical solution is on the same plane and the plane is perpendicular to the traveling body.

[10] It is given using the nozzle device according to any one of claims 1 to 7,

A chemical solution characterized by being a wet paper strength agent, a cleaning agent, a pitch control agent, an antifouling agent or a release agent.

[11] The chemical solution according to [10], wherein the viscosity is 500 cps or less.