JP2008290023A - Nozzle apparatus, method for supplying chemical solution using the same, and chemical solution - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a nozzle apparatus capable of suppressing clogging of first and second air main bodies with a solid matter, reliably supplying a chemical solution to a moving body even in a paper manufacturing apparatus at an ultrahigh speed, and sufficiently suppressing scattering of the chemical solution, and to provide a method for supplying a chemical solution using the nozzle apparatus. <P>SOLUTION: The nozzle apparatus comprises a nozzle main body 2, a discharge nozzle 1 formed on the top face of the nozzle main body 2 and enabled to discharge a chemical solution, a first air main body 10 installed in one side face of the nozzle main body 2 and having a first inner space where air passes, a first air port 12 formed on the top face of the first air main body 10 by leaving the upper part of the first inner space open, a second air main body 20 installed in the other side face of the nozzle main body 2 and having a second inner space where air passes, and a second air port 22 formed on the top face of the second air main body 20 by opening the upper part of the second inner space. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a nozzle device, a chemical solution application method using the nozzle device, and a chemical solution.

  In the paper industry, for the purpose of preventing the transfer of foreign materials derived from pulp raw materials from the paper body, improving paper separation, etc., for paper machine wires, felts, dryer rolls, canvas and other members. A chemical solution containing chemicals such as a wet paper strength agent, a cleaning agent, a pitch control agent, a contamination inhibitor, and a release agent is applied from a nozzle of a nozzle device attached to the paper machine.

However, since the paper body travels at a high speed in the paper machine, an air flow (hereinafter referred to as “associated flow”) is generated near the surface of the paper body, and from the nozzle to the paper body. The chemical | medical solution discharged toward the direction generate | occur | produces by the accompanying flow.
In this case, not only the chemical solution cannot be sufficiently applied to the paper body, but also the rolled up chemical solution adheres to the frame, the hood or the like and contaminates the paper machine.

As an apparatus for preventing such a chemical liquid from rolling up, the present inventor has already formed an air curtain on the upstream side and the downstream side of a chemical liquid (fluid) ejection nozzle, and sprays the chemical liquid in the space between them. A scattering prevention device has been proposed (see Patent Document 1).
According to this apparatus, in the conventional paper machine in which the paper making speed is relatively low, most of the chemical solution reaches the traveling body, and the above problems can be solved.

However, in recent years, paper machines have become very fast, and now, those having a paper making speed of 1500 to 2000 m / min have appeared.
In such an ultra-high speed paper machine, the accompanying flow around the traveling body is extremely strong in both wind speed and pressure, so the above apparatus cannot sufficiently apply the chemical to the traveling body, and the scattering of the chemical is also sufficient. It cannot be suppressed.
Rather, the accompanying flow around the paper body is greatly disturbed by the air curtain and tends to generate turbulence.

In contrast, the inventors of the present application, as a nozzle device that can reliably apply a chemical solution to a traveling body (paper body) even in an ultra-high speed paper machine or the like, and can sufficiently suppress the scattering of the chemical solution, A first nozzle that is located upstream of the discharge nozzle with respect to the traveling direction of the traveling body, and a second nozzle that is located downstream of the discharge nozzle with respect to the traveling direction of the traveling body. And a nozzle device in which both the first and second spray nozzles are capable of spraying air (see Patent Document 2).
Japanese Utility Model Publication No. 01-152762 Japanese Patent Application No. 2006-168146

However, the nozzle device described in Patent Document 2 described above tends to adhere solid matter or the like obtained by solidifying the chemical solution to the spray nozzles (first and second air bodies).
That is, when the nozzle device described in Patent Document 2 is used for a long period of time, solid matter gradually adheres to the nozzle openings of the spray nozzles (first and second air bodies), and there is a tendency that air cannot be sufficiently discharged.
In this case, since the accompanying flow cannot be reliably suppressed, the chemical solution cannot be reliably applied to the traveling body.

  The present invention has been made in view of the above circumstances, and suppresses clogging of the first and second air bodies with solids, and reliably applies a chemical to a traveling body even in an ultra-high speed paper machine or the like. Another object of the present invention is to provide a nozzle device capable of sufficiently suppressing scattering of a chemical solution and a method for applying a chemical solution using the nozzle device.

The present inventors have intensively studied to solve the above-mentioned problems. As a result, solids adhere to the first and second air bodies when air is blown from the first and second air bodies. This is because the first and second air bodies (first and second internal spaces) have a negative pressure in a region away from the central portion, and a part of the medicine discharged from the discharge nozzle is sucked. all right.
And in order to suppress that the 1st and 2nd internal space becomes negative pressure, when the 1st and 2nd internal space was opened so that it might be open | released by external air, not only the said subject is solved. Surprisingly, the present inventors have found that the air blowing force is improved and completed the present invention.

  That is, the present invention is (1) a nozzle device for applying a chemical solution to a traveling body, the nozzle body, a discharge nozzle provided on the upper surface of the nozzle body and capable of discharging a chemical solution, and a nozzle body A first air body provided on one side surface and having a first internal space through which air passes, and a first air port provided on the upper surface of the first air body by opening the upper portion of the first internal space And a second air body provided on the other side surface of the nozzle body and having a second internal space through which air passes, and an upper portion of the second internal space is opened to provide an upper surface of the second air body. A second air port, and the first air port and the second air port can spray air, and the first air body has a through hole in which the first internal space is opened to the outside air. The second air body is provided with a second inner Space exists in the nozzle unit is a through hole which is open to the outside air is provided.

  The present invention resides in (2) the nozzle device according to the above (1), wherein a through hole is provided in a side surface and / or a bottom surface of each of the first air main body and the second air main body.

  In the present invention, (3) the discharge nozzle, the first air port, and the second air port are arranged along the traveling direction of the traveling body, and the width in the direction perpendicular to the traveling direction of the chemical liquid discharged from the discharge nozzle is In the nozzle device according to the above (1), the width in the direction perpendicular to the traveling direction of the air blown from the first air port and the second air port is larger.

  The present invention resides in (4) the nozzle device according to (1), wherein the first air main body and the second air main body are integrated.

  The present invention resides in (5) the nozzle device according to (1), wherein an angle formed by the traveling direction of the traveling body and the discharge direction of the chemical liquid discharged from the discharge nozzle is 30 to 135 degrees.

  The present invention resides in (6) the nozzle device according to the above (1), wherein the nozzle opening of the discharge nozzle has a slit shape.

  The present invention resides in (7) the nozzle device according to the above (1), wherein the chemical liquid contains a wet paper strength agent, a cleaning agent, a pitch control agent, a contamination preventive agent or a release agent.

  The present invention resides in (8) the nozzle device according to (1), wherein the traveling body is a paper body, a canvas, a dryer roll, a calendar roll, or a canvas roll.

  The present invention is (9) an application method in which the nozzle device according to any one of the above (1) to (8) is attached to a paper machine, and a chemical solution is applied using the nozzle device, A chemical solution that is provided with a paper machine, a canvas, a dryer roll, a calendar roll, or a canvas roll provided with a paper machine, and at the same time, a chemical is applied from the first air port and the second air port by a discharge nozzle. It exists in the grant method.

  The present invention resides in (10) the method for applying a chemical solution according to (9) above, wherein the paper machine is provided with a scanning means, and the nozzle device is reciprocally scanned by the scanning means.

  The present invention is (11) a wet paper strength agent, a cleaning agent, a pitch control agent, an antifouling agent or a release agent, which is applied using the nozzle device according to any one of (1) to (8) above. Exists in the chemical solution.

  This invention exists in the chemical | medical solution of the said (11) description whose (12) viscosity is 500 cps or less.

  In addition, as long as the objective of this invention is met, the structure which combined said (1)-(12) suitably is also employable.

According to the nozzle device of the present invention, since the chemical liquid is discharged from the discharge nozzle and at the same time, air is blown from the first air port and the second air port, scattering of the chemical liquid due to the accompanying flow caused by traveling is suppressed. .
That is, since the air blown from the first air port and the second air port is blown between the accompanying flow and the chemical solution, a situation in which the chemical solution is wound up by the accompanying flow is suppressed.
For this reason, according to the said nozzle apparatus, a chemical | medical solution is reliably sprayed on a traveling body.

In the nozzle device, the first air main body is provided with a through hole in which the first internal space is opened to the outside air, and the second air main body is provided with a through hole in which the second internal space is opened to the outside air. Since the hole is provided, when air is blown from the first air port and the second air port, the first internal space and the second internal space become negative pressure, and a part of the medicine discharged from the discharge nozzle It is possible to suppress the occurrence of a situation of sucking.
Therefore, even if it is a case where the said nozzle apparatus is used for a long period of time, it is suppressed that a solid substance adheres to the nozzle opening of an air hole.

  Furthermore, since the first air main body and the second air main body spray air in a state in which outside air is taken from the through holes into the corresponding first inner space and second inner space, respectively, the air blowing force is improved.

  For these reasons, according to the nozzle device, the air holes can be prevented from being clogged with solid matter, and the chemical solution can be reliably applied to the traveling body even in an ultra-high speed paper machine and the like. Scattering can also be sufficiently suppressed.

  In the nozzle device of the present invention, when the through holes are provided in the side surfaces and / or the bottom surfaces of the first air main body and the second air main body, the air blowing force is reliably improved.

  In the nozzle device of the present invention, the discharge nozzle, the first air port, and the second air port are arranged along the traveling direction of the traveling body, and the width of the chemical liquid ejected from the discharge nozzle is perpendicular to the traveling direction. However, if the width in the direction perpendicular to the traveling direction of the air blown from the first air port and the second air port is larger, the scattering of the chemical solution due to the accompanying flow is more reliably suppressed.

In the nozzle device of the present invention, the first air main body and the second air main body are integrated, and by supplying air from one place, the same strength can be obtained from the first air port and the second air port. It becomes possible to blow the air.
Moreover, if the first air body and the second air body are detachable, they can be easily detached.

  In the nozzle device of the present invention, when the angle formed by the traveling direction of the traveling body and the discharge direction of the chemical liquid discharged from the discharge nozzle is 30 to 135 degrees, the discharged chemical liquid is not easily affected by the accompanying flow. The chemical solution can be more reliably applied to the traveling body.

In the nozzle device of the present invention, when the nozzle port of the discharge nozzle has a slit shape, the area on which the chemical liquid can be applied at a time increases, so the number of nozzle devices can be reduced.
Further, even when the chemical solution is discharged 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 on which the chemical solution can be applied at a time, so that the nozzle device is moved at a relatively low speed. be able to.

  In the nozzle device of the present invention, when the chemical solution contains a wet paper strength agent, a cleaning agent, a pitch control agent, a contamination preventive agent or a release agent, cleaning, pitch removal, paper fraying prevention, etc. are effectively performed.

  In the nozzle device of the present invention, when the traveling body is a paper body, canvas, dryer roll, calendar roll or canvas roll, dirt, pitch, paper fraying and the like are likely to occur, so that these can be effectively prevented.

Since the chemical | medical solution provision method of this invention uses the nozzle apparatus mentioned above, it can suppress that an air hole is clogged with a solid substance.
In addition, since the chemical solution is applied by the discharge nozzle and air is simultaneously blown by the first air port and the second air port, the chemical solution is applied to the traveling body even in an ultra-high speed paper machine. Can be reliably applied, and the scattering of the chemical solution can be sufficiently suppressed.

According to the method for applying a chemical solution of the present invention, a scanning unit is attached to the paper machine, and when the above-described nozzle device is reciprocally scanned by the scanning unit, the chemical solution is reliably supplied even if the number of nozzle devices is one. It can be applied to paper, canvas, dryer roll, calendar roll or canvas roll.
If the number of nozzle devices is one, maintenance is easy and cost is advantageous.

  Since the chemical solution of the present invention is applied using the nozzle device described above and is a wet paper strength agent, a cleaning agent, a pitch control agent, a contamination inhibitor or a release agent, the traveling body to which the chemical solution is applied is applied. The function based on the chemical solution can be surely exhibited.

Further, when the viscosity of the chemical solution is 500 cps or less, the chemical solution can be reliably applied to the traveling body, and scattering of the chemical solution can be sufficiently suppressed.
Even if the chemical liquid is scattered, the chemical liquid is prevented from adhering again and solid matter is prevented from adhering to the nozzle opening, and the nozzle opening itself can be reliably suppressed.

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.
Further, the positional relationship such as up, down, left and right is based on the positional relationship 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 a nozzle device according to the present embodiment.
As shown in FIG. 1, a nozzle device 100 according to this embodiment is provided on a nozzle body 2, a discharge nozzle 1 that is capable of discharging a chemical solution, and provided on one side surface of the nozzle body 2. A first air body 10 having a first internal space through which air passes, and a first air port 12 provided on the upper surface of the first air body 10 by opening the upper part of the first internal space, The second air body 20 is provided on the other side surface of the nozzle body 2 and has a second inner space through which air passes, and the upper portion of the second inner space is opened, so that it is provided on the upper surface of the second air body. And a second air port 22.

In the nozzle device 100, the first air port 12 and the second air port 22 can blow air, and the discharge nozzle 1, the first air port 12 and the second air port 22 are not shown in the drawing. Are arranged along the traveling direction A.
That is, in the nozzle device 100, the first air port 12 is positioned upstream of the discharge nozzle 1 with respect to the traveling direction A of the traveling body, and the second air port 22 is disposed with respect to the traveling direction A of the traveling body. It is located downstream of the discharge nozzle 1.

The nozzle device 100 according to the present embodiment is used for applying a chemical solution from the discharge nozzle 1 to the traveling body.
For example, when the traveling body travels in the traveling direction A, air is first blown from the first air port 12 to the predetermined position of the traveling body, then the chemical solution is applied from the discharge nozzle 1, and finally the second position. Air is blown from the air port 22.

In the nozzle device 100, since the chemical liquid is discharged from the discharge nozzle 1 and air is blown from the first air port 12 and the second air port 22, scattering of the chemical liquid due to the accompanying flow caused by traveling is suppressed. The
That is, since the air blown from the first air port 12 and the second air port 22 is blown between the accompanying flow and the chemical solution, a situation in which the chemical solution is wound up by the accompanying flow is suppressed.
For this reason, according to the said nozzle apparatus 100, a chemical | medical solution is reliably sprayed on a traveling body.

The discharge nozzle 1 has a hemispherical shape, and is provided with a slit 3 at the top.
The slit 3 has a line shape extending in a direction perpendicular to the traveling direction A.

For this reason, the chemical | medical solution discharged from the said discharge nozzle 1 will be discharged in fan shape (at the end of a spread) with respect to a traveling body.
Therefore, in this case, since the area where the chemical solution can be applied at a time increases, the number of nozzle devices 100 can be reduced.
Further, even when the chemical liquid is discharged while moving the nozzle apparatus 100 in the vertical direction with respect to the traveling body, the nozzle apparatus 100 is moved at a relatively low speed because the area where the chemical liquid can be applied at once is large. Can do.

At this time, the width of the air blown from the first air port 12 and the second air port 22 is larger than the width of the chemical liquid discharged from the slit 3 of the discharge nozzle 1.
For this reason, in the said nozzle apparatus 100, scattering of the chemical | medical solution by an accompanying flow is suppressed more reliably.

The discharge nozzle 1 is provided substantially at the center of the upper surface of a rectangular parallelepiped nozzle body 2.
The nozzle body 2 is connected to arms 5a and 5b for fixing the nozzle body 2 at both ends.
A supply pipe for feeding a chemical solution to the discharge nozzle 1 is provided in the nozzle body 2 and the arm portions 5a and 5b.
Such a supply pipe will be described later.

In the nozzle device 100 according to the present embodiment, the first air main body 10 and the second air main body 20 are integrated.
That is, the wall surface portion 15 forming the first air main body 10 and the second air main body 20 has a U-shaped cross section, and is attached from below along the side surface of the nozzle main body 2.
Since the wall surface portion 15 is separate from the nozzle body 2, it can be easily detached from the nozzle body 2.

In the nozzle device 100, by attaching the wall surface portion 15 to the nozzle body 2, the first air port 12 is formed on the upper surface of the first air body 10, and the second air port 22 is formed on the upper surface of the second air body 20. It is formed.
Accordingly, the nozzle device 100 blows air of the same strength from the first air port 12 and the second air port 22 by supplying air from a predetermined location.
The air supply will be described later.

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, the first air body 10 has a first internal space 11 through which air passes.
The first internal space 11 has a rectangular parallelepiped shape, and since the blowing side is not narrowed, the air supplied from the lower part is blown upward as it is.
For this reason, more air is blown over a wide range.

  The first air port 12 is provided on the upper surface of the first air body 10 by opening the upper part of the first internal space 11.

Further, the first air body 10 is provided with a through-hole 18 on the side surface thereof in which the first internal space 11 is opened to the outside air.
In this case, since the air is blown from the first air port 12 in a state where the outside air is taken into the first internal space 11 from the through hole, the blowing force of the air is improved.

Although not shown, the second air body 20 has the same structure.
That is, the second air main body 20 has a rectangular parallelepiped second internal space through which air passes.
The second air port 22 is provided on the upper surface of the second air body 20 by opening the upper part of the second internal space.
Further, the second air main body 20 is provided with a through hole in the side surface of the first air main body 20 in which the second internal space is opened to the outside air.

  In the nozzle device 100, the first air main body 10 is provided with a through hole 18 in which the first internal space 11 is opened to the outside air, and the second air main body 20 is opened to the second internal space to the outside air. When the air is blown from the first air port 12 and the second air port 22, the first internal space 11 and the second internal space become negative pressure and are discharged from the discharge nozzle. It is possible to suppress a situation in which a part of the applied medicine is sucked.

Here, a mechanism for sucking a part of the medicine discharged from the discharge nozzle when the first internal space 11 and the second internal space become negative pressure will be described.
FIG. 3 is an explanatory diagram for explaining a mechanism for sucking a part of the medicine ejected from the ejection nozzle when the first internal space becomes a negative pressure.
As shown in FIG. 3, in the nozzle device 100 according to the present embodiment, the air supplied from the air supply port 16 passes through the first internal space 11 and is blown from the first air port 12.
At this time, since the first air port 12 is provided by opening the upper part of the first internal space 11, air has an advantage that it can be blown over a wider range, but air that travels straight from the air supply port 16. In other areas, for example, at both ends of the first air port 12, the air pressure is weak.

Further, the air blown from the substantially central portion at the first air port 12 is discharged together with the air in the first internal space 11.
As a result, the air in the first internal space 11 is insufficient, and as a result, the first internal space 11 becomes negative pressure.

  As described above, since the air pressure at both ends of the first air port 12 is weak, when the negative pressure in the first internal space 11 becomes larger than the air pressure of the air to be blown, the external air (scattered chemical liquid) Etc.) is sucked from both ends of the first air port 12.

  Since the nozzle device 100 according to the present embodiment is provided with the through hole 18 as described above, the nozzle device of the first air port 12 and the second air port 22 is solid even when used for a long time. The attachment of an object is suppressed, and the first air main body 10 and / or the second air main body 20 blows air in a state in which outside air is taken in from the through hole 18, so that the air blowing force is improved.

Further, in the nozzle device 100, two through holes 18 are provided in the first air body 10 so as to sandwich the air supply port 16 through which air is supplied to the internal space 11.
Here, the effect when the through hole is provided in the first air body will be described.

4 (a) and 4 (b) are explanatory views for explaining the effect when the first air body is provided with a through hole.
As shown in FIG. 4 (a), when there is one through hole 18, the through hole 18 suppresses the negative pressure in the internal space 11a. Adhering to the air holes 12a is suppressed. However, in this case, the blowing of air is bent in the X direction due to the suction of the chemical liquid Y.

On the other hand, as shown in FIG. 4B, when there are two through holes 18, the through hole 18 suppresses the negative pressure in the internal space 11 in the same manner as described above. Suction and adhesion to the air holes 12 of the first air body 10 are suppressed.
Further, in this case, since the chemical liquid Y is sucked evenly from both sides of the air hole 12, the air blowing direction is maintained substantially straight.

  Therefore, it is preferable that the number of through holes provided in the first air body is two or more symmetrically at least at a position sandwiching the air supply port 16.

FIG. 5 is a cross-sectional view taken along line II of the nozzle device shown in FIG.
As shown in FIG. 5, in the nozzle main body 2 of the nozzle device 100, a chemical liquid supply pipe 8a for supplying a chemical liquid to the nozzle main body 2 is connected to the arm portion 5a, and the chemical liquid is supplied to the arm portion 5b. A discharge air supply pipe 8b for supplying air to be discharged is connected.
On the other hand, a blowing air supply pipe 7 for supplying air blown from the first nozzle hole 12 and the second nozzle hole 22 is connected to the lower end of the wall surface portion 15.

  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.

The chemical solution supplied from the chemical solution supply pipe 8a flows through the inside of the chemical solution supply tube 8a and is sent to the chemical solution flow path S1 communicated with the chemical solution supply tube 8a.
And a chemical | medical solution is sent to the nozzle main body 2 from the chemical | medical solution flow path S1.
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 communicating with the discharge air supply pipe 8b.
And air is sent to the nozzle body 2 from the discharge air flow path S2.

The chemical solution and air sent to the nozzle body 2 are mixed in the discharge nozzle 1 and discharged from the slit 3.
In other words, in the nozzle device 100, the chemical liquid is discharged by supplying air to the discharge nozzle 1 and simultaneously supplying air.
At this time, the discharged chemical liquid is accelerated by the momentum of the discharged air.

6 is a cross-sectional view of the nozzle device shown in FIG. 2 taken along the line II-II.
As shown in FIG. 6, in the nozzle device 100 according to the present embodiment, the air supplied from the blowing air supply pipe 7 flows into the blowing air flow path S <b> 3 inside the wall surface portion 15 communicating with the blowing air supply pipe 7. It is sent from the supply port 16.

Then, the sent air is divided into two forks inside the wall surface portion 15 and is sent to the first internal space 11 and the second internal space 21 respectively.
The sent air is blown to the traveling body from the first air port 12 and the second air port 22 formed on the upper surface.
At this time, air is also supplied to the first air port 12 and the second air port 22 from the through hole 18.

The nozzle device 100 according to the present embodiment is arranged to have a predetermined angle with respect to the traveling body.
In other words, 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. 7 is an explanatory diagram for explaining the angle between the chemical solution discharged from the nozzle device according to the present embodiment and the traveling body.
As shown in FIG. 7, in the nozzle device 100 according to the present embodiment, the angle θ formed by the traveling direction A of the traveling body and the discharge direction D of the chemical liquid in the discharge nozzle 1 is 30 to 135 degrees, and is 30 to 90 degrees. It is preferable that it is 30 to 60 degrees.

  If the angle θ formed by the traveling direction A of the traveling body and the discharge direction D of the chemical liquid at the discharge nozzle 1 is less than 30 degrees, the discharged chemical liquid tends to be insufficiently applied to the traveling body, and the angle θ is 90 degrees. When the angle exceeds the angle θ, the chemical discharged by the accompanying flow tends to be wound up and scattered more easily than in the case where the angle θ is in the above range.

In the nozzle device 100, the air blown from the first air port 12 is blown between the accompanying flow generated by the running of the traveling body and the chemical liquid discharged from the discharge nozzle 1.
For this reason, the winding-up of the chemical | medical solution by an accompanying flow is suppressed.

On the other hand, the slight accompanying flow generated between the air blown from the first air port 12 and the chemical liquid discharged from the discharge nozzle 1 is not suppressed by the first air port 12.
Therefore, the accompanying flow winds up the chemical liquid discharged from the discharge nozzle 1.
However, in the nozzle device 100, the air blown from the second air port 22 suppresses the winding.

In the nozzle device 100, it is preferable that the distance L from the tip of the discharge nozzle 1 to the intersection of the liquid discharge direction D and the traveling body is 30 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.

In the nozzle device 100 according to the present embodiment, it is preferable that the chemical solution includes a wet paper strength agent, a cleaning agent, a pitch control agent, a contamination inhibitor, or a release agent.
In this case, the chemical liquid can be reliably applied to the traveling body, and the traveling body to which the chemical liquid is applied can reliably exhibit the function based on the applied chemical liquid.

Moreover, it is preferable that the viscosity of the said chemical | medical solution is 500 cps or less, and it is more preferable that it is 1-200 cps.
In this case, the chemical liquid can be reliably applied to the traveling body, and scattering of the chemical liquid can be sufficiently suppressed.
Even if the chemical liquid is scattered, the chemical liquid is prevented from adhering again and solid matter is prevented from adhering to the nozzle opening, and the nozzle opening itself can be reliably suppressed.

  As described above, according to the nozzle device 100 according to the present embodiment, the air hole can be prevented from being clogged with solid matter, and the chemical can be reliably applied to the traveling body even in an ultra-high speed paper machine or the like. Moreover, scattering of the chemical solution can be sufficiently suppressed.

Next, the chemical | medical solution provision method using the nozzle apparatus 100 which concerns on this embodiment is demonstrated.
FIG. 8 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. 8, the paper machine 50 includes a rotatable drum 45, and a traveling body 40 is disposed 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 means 30 is attached above the drum 45.
A driving device 43 that reciprocates in the length direction of the scanning unit 30 is attached to the scanning unit 30, and the nozzle device 100 described above receives a chemical solution toward the traveling body 40 in the driving unit 43. It is attached so that it 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 40 and the discharge direction of the chemical liquid so that the discharged chemical liquid is sufficiently applied to the traveling body 40.

Then, while the traveling body 40 is traveling in the traveling direction A, the nozzle device 100 is reciprocally scanned together with the driving device 43, and the chemical liquid is discharged from the nozzle device 100 toward the traveling body 40, thereby causing the traveling body 30 to perform the chemical solution. Is granted.
At this time, the chemical liquid is applied from the discharge nozzle of the nozzle device 100 and air is blown by the first and second air ports.

Since the chemical | medical solution provision method which concerns on this embodiment uses the nozzle apparatus 100 mentioned above, it can suppress that an air hole is clogged with a solid substance.
In addition, since the chemical solution is applied by the discharge nozzle and air is simultaneously blown by the first air port and the second air port, the chemical solution is applied to the traveling body even in an ultra-high speed paper machine. Can be reliably applied, and the scattering of the chemical solution can be sufficiently suppressed.

Further, in the method of applying the chemical liquid, the scanning unit 30 is attached to the paper machine 50, and the above-described nozzle device 100 is reciprocated by the scanning unit 30, so even if the number of the nozzle devices 100 is one. The chemical solution can be reliably applied to the traveling body 40.
When the number of nozzle devices 100 is one, maintenance is easy and cost is advantageous.

Examples of the traveling body 40 include a paper body, a wire, a felt, a dryer roll, a calendar roll, a canvas for drying the paper body, a canvas roll, and the like.
Among these, it is preferable to use for a paper body, a canvas, a dryer roll, a calendar roll, or a canvas roll.
In general, paper bodies, canvases, dryer rolls, calendar rolls or canvas rolls in a paper machine run at a high speed and easily cause dirt, pitch, paper fraying, and the like, so that these can be effectively prevented.

  The preferred embodiment of the present invention has been described above, but the present invention is not limited to the above embodiment.

  For example, in the nozzle device 100 according to the above-described embodiment, two through holes 18 are provided on the side surface of the wall surface portion 15, but the present invention is not limited to this.

FIGS. 9A, 9B, and 9C are views showing examples of through holes provided in the side surface of the first air body.
In the nozzle device 100 according to the present embodiment, two through holes 18 are provided on the side surface of the first air main body 10, but as shown in FIG. Four through-holes 18 may be provided, and as shown in FIG. 9B, six through-holes 18 may be provided on the side surface of the first air body 10, and (c) in FIG. ), Eight through holes 18 may be provided on the side surface of the first air body 10.
The same applies to the second air body 20.
However, as shown to (a)-(c) of FIG. 9, it is preferable to provide the through-hole 18 in the position used as left-right symmetry.

(A) and (b) of FIG. 10 is a figure which shows the example of the through-hole provided in the bottom face of a wall surface part.
In addition, the left through-hole 18 of the wall surface portion 15 shown in FIG. 10 communicates with the first internal space, and the right through-hole 18 communicates with the second internal space.
As shown in FIG. 10 (a), four through holes 18 may be provided in the bottom surface of the wall surface portion 15, and as shown in FIG. 10 (b), eight through holes are formed in the bottom surface of the wall surface portion 15. A hole 18 may be provided.
However, as shown to (a) and (b) of FIG. 10, it is preferable to provide the through-hole 18 in the position which becomes left-right symmetric and symmetrical.

  In the nozzle device 100 in the above embodiment, the nozzle port of the discharge nozzle 1 has a slit shape, but may have a round shape.

  In the nozzle device 100 according to the above-described embodiment, the discharge nozzle 1, the first air port 12, and the second air port 22 are arranged in a row with respect to the traveling direction A, but are not necessarily in a row.

In the nozzle device 100 in the above embodiment, the nozzle main body 2 and the wall surface portion 15 are separate, but may be integrated.
Further, the first air body 10 and the second air body 20 may be separate.

  In the nozzle device 100 in the above-described embodiment, the discharge nozzle 1 has a hemispherical shape, but may have a square shape, a triangular shape, or the like, and the form is not particularly limited.

  The nozzle device 100 according to the above embodiment can be used for food processing, fiber processing, and the like in addition to a paper machine.

  Further, in the example in which the nozzle device 100 according to this embodiment described above is used in the paper machine 50, one nozzle device 100 is attached to the paper machine 50, but a plurality of nozzle devices 100 are attached to the paper machine. May be.

FIG. 11 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. 11, the paper machine is provided with a plurality of driving devices 43 for reciprocating scanning in the length direction of the scanning means 30 on the scanning means 30, and the nozzle device 100 is attached to each driving device 43. You may attach so that a chemical | medical solution may be discharged toward the traveling body 40. FIG.

FIG. 12 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. 12, a plurality of nozzle devices 100 may be attached to a predetermined main body 70.
That is, when this is used in a paper machine, the chemical solution is simultaneously ejected from the plurality of nozzle devices 100 attached to the main body 70, so that the reciprocating scanning 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).
A traveling body (not shown) travels in the direction of arrow A (traveling direction).

  Hereinafter, examples using the nozzle device of the present invention will be described in detail, but the present invention is not limited thereto.

(Examples 1-8)
Nozzle devices having the first air main body and the second air main body provided with the number of through holes shown in Table 1 below were manufactured.
In addition, the position of the through-hole was set to the position shown in FIG.

[Table 1]

[Evaluation method of nozzle device]
(Adhesion of chemicals)
Using the nozzle device of Example 1 and Comparative Example 1, Dustain R409S (release agent, viscosity 3 cps, manufactured by Mentec Co., Ltd.) was used as a chemical solution, and was continuously discharged under the following conditions.
A photograph of the nozzle device after two weeks is shown in FIG.
13A shows the nozzle device of Example 1, and FIG. 13B shows the nozzle device of Comparative Example 1.

(Blowing power)
As shown in FIG. 14, the nozzle devices obtained in Examples 1 to 8 and Comparative Example 1 were disposed so that the air holes faced downward, and a scale 80 was disposed 10 cm below the nozzle device.
And air was sprayed so that a blow pressure might be set to 0.3 Mpa, and the scale of the measurement at that time was measured.
The obtained results are shown in Table 2.
The values in Table 2 are relative values when the value obtained with the nozzle device of Comparative Example 1 is 1.

[Table 2]

From FIG. 13, it was confirmed that Example 1 using the nozzle device according to the present invention can sufficiently suppress the adhesion of the chemical solution compared with Comparative Example 1 that does not depend on the present invention.
Moreover, from Table 2, it was found that Examples 1 to 8 using the nozzle device according to the present invention have significantly improved spraying power as compared with Comparative Example 1 that does not depend on the present invention.

  From the above results, according to the nozzle device of the present invention, the first and second air bodies are prevented from being clogged with solid matter, and the chemical solution is reliably applied to the traveling body even in an ultra-high speed paper machine or the like. It was confirmed that the chemical solution could be sufficiently suppressed.

[Method for evaluating chemicals]
(Adhesion of chemicals)
WS4052 (wet paper strength agent, viscosity: 500 cps, manufactured by PMC) was prepared, and the viscosity was adjusted to 10,100,200,400,500,600,1000 (cps) with water or a thickener to obtain a chemical solution.
These were set in the nozzle device of Example 1, and continuously discharged for 2 weeks or 5 weeks, and the state of the nozzle device was visually evaluated.
In this evaluation, “No” indicates that no solid matter is adhered to the nozzle device, “Δ” indicates that solid matter is slightly adhered to the nozzle device, and “X” indicates that solid matter is often adhered to the nozzle device.
The obtained results are shown in Table 3.

[Table 3]

  From the results in Table 3, when the viscosity of the chemical solution is 500 cps or less, the chemical solution can be reliably applied to the traveling body, and the chemical solution can be reliably prevented from reattaching and solid matter from adhering to the nozzle opening. all right.

FIG. 1 is a top view showing a nozzle device according to the present embodiment. 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 an explanatory diagram for explaining a mechanism for sucking a part of the medicine ejected from the ejection nozzle when the first internal space becomes a negative pressure. 4 (a) and 4 (b) are explanatory views for explaining the effect when the first air body is provided with a through hole. FIG. 5 is a cross-sectional view taken along line II of the nozzle device shown in FIG. 6 is a cross-sectional view of the nozzle device shown in FIG. 2 taken along the line II-II. FIG. 7 is an explanatory diagram for explaining the angle between the chemical solution discharged from the nozzle device according to the present embodiment and the traveling body. FIG. 8 is a perspective view schematically showing an example in which the nozzle device according to this embodiment is used in a paper machine. FIGS. 9A, 9B, and 9C are views showing examples of through holes provided in the side surface of the first air body. (A) and (b) of FIG. 10 is a figure which shows the example of the through-hole provided in the bottom face of a wall surface part. FIG. 11 is a perspective view schematically showing another example in which the nozzle device according to the present embodiment is used in a paper machine. FIG. 12 is a top view schematically showing another example in which the nozzle device according to the present embodiment is used in a paper machine. (A) of FIG. 13 is a figure which shows the result of the adhesive evaluation of the chemical | medical solution of Example 1, (b) is a figure which shows the result of the adhesive evaluation of the chemical of Comparative Example 1. FIG. 14 is a diagram illustrating a test method for evaluating the spraying force of the example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Discharge nozzle 2 ... Nozzle main body 3 ... Slit 5a, 5b ... Arm part 7 ... Spraying air supply pipe 8a ... Chemical liquid supply pipe 8b ... Discharge air supply pipe 10. ..First air body 11 ... first internal space 12 ... first air port 15, 15a ... wall surface 16 ... air supply port 18 ... through hole 20 ... second air Main body 21 ... Second internal space 22 ... Second air port 30 ... Scanning means 40 ... Running body 43 ... Drive device 45 ... Drum 50 ... Paper machine 70 ... Body 80 ... Weighing 100 ... Nozzle device A ... Running direction D ... Discharge direction L ... Distance S1 ... Chemical liquid flow path S2 ... Discharge air flow path S3 ... Blowing air Channel X ... Direction Y ... Chemical solution θ ... Angle

Claims (12)

A nozzle device for applying a chemical to a traveling body,
A nozzle body;
A discharge nozzle provided on an upper surface of the nozzle body and capable of discharging the chemical liquid;
A first air body provided on one side of the nozzle body and having a first internal space through which air passes;
A first air port provided on an upper surface of the first air body by opening an upper portion of the first internal space;
A second air body provided on the other side of the nozzle body and having a second internal space through which air passes;
A second air port provided on an upper surface of the second air main body by opening an upper portion of the second internal space;
With
The first air port and the second air port can spray the air,
The first air body is provided with a through hole in which the first internal space is opened to the outside air,
The nozzle device according to claim 1, wherein the second air body is provided with a through hole in which the second internal space is opened to the outside air.   The nozzle device according to claim 1, wherein the through hole is provided in a side surface and / or a bottom surface of each of the first air main body and the second air main body. The discharge nozzle, the first air port, and the second air port are arranged along a traveling direction of the traveling body;
The width of the chemical liquid discharged from the discharge nozzle in the direction perpendicular to the traveling direction of the air blown from the first air port and the second air port is larger than the width in the direction perpendicular to the traveling direction. The nozzle device according to claim 1, wherein the nozzle device is large.   The nozzle device according to claim 1, wherein the first air main body and the second air main body are integrated.   The nozzle device according to claim 1, wherein an angle formed by a traveling direction of the traveling body and a discharge direction of the chemical liquid discharged from the discharge nozzle is 30 to 135 degrees.   The nozzle device according to claim 1, wherein a nozzle port of the discharge nozzle has a slit shape.   The nozzle device according to claim 1, wherein the chemical liquid includes a wet paper strength agent, a cleaning agent, a pitch control agent, a contamination preventing agent, or a release agent.   The nozzle device according to claim 1, wherein the traveling body is a paper body, a canvas, a dryer roll, a calendar roll, or a canvas roll. The nozzle device according to any one of claims 1 to 8 is attached to a paper machine, and is an application method for applying a chemical using the nozzle device,
A chemical is applied by a discharge nozzle to the paper body, canvas, dryer roll, calendar roll or canvas roll provided in the paper machine, and at the same time, air is blown from the first air port and the second air port. The chemical | medical solution provision method characterized by the above-mentioned. The paper machine is equipped with scanning means,
The chemical solution applying method according to claim 9, wherein the nozzle device is reciprocally scanned by the scanning unit. It is given using the nozzle device according to any one of claims 1 to 8,
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.   12. The chemical solution according to claim 11, wherein the viscosity is 500 cps or less.

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