JP2008018424A - Nozzle device, chemical solution application method using the same, and chemical solution - Google Patents

Abstract

Disclosed is a nozzle device capable of reliably applying a chemical solution to a traveling body even in an ultra-high speed paper machine and the like, and a method of applying a chemical solution using the nozzle device.
The present invention relates to a nozzle device for applying a chemical to a traveling body, including a discharge nozzle capable of discharging a chemical and an upstream side of the discharge nozzle with respect to a traveling direction of the traveling body. A first spray nozzle 12 positioned on the downstream side of the discharge nozzle 1 with respect to the traveling direction of the traveling body, and a first spray nozzle 12 and a second spray nozzle 22. The two spray nozzles 22 are capable of spraying air, and the angle between the traveling direction of the traveling body and the discharge direction of the chemical in the discharge nozzle 1 is 30 to 135 degrees. is there.
[Selection] Figure 1

Description

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

  Conventionally, in the paper industry, for the purpose of preventing the transfer of foreign materials derived from pulp raw materials from the paper body and improving the paper separation for paper machine wires, felts, dryer rolls, canvas and other members Thus, a chemical solution containing chemicals such as a cleaning agent, a pitch control agent, a contamination inhibitor, and a release agent is applied.

  These chemicals are generally supplied from the nozzle of a nozzle device attached to the paper machine while the paper machine is in operation, such as paper, wire, felt, dryer roll, canvas, etc. (hereinafter referred to as “running body”). To be granted.

However, since the traveling body travels at high speed in the paper machine, an air flow (hereinafter referred to as an “associated flow”) is generated near the surface of the traveling body, and the nozzle travels from the nozzle to the traveling body. The chemical | medical solution discharged toward the direction generate | occur | produces by the accompanying flow.
If it does so, the situation where not only chemical | medical solution cannot fully be provided to a traveling body but the rolled up chemical | medical solution adheres to a flame | frame, a hood, etc. will arise.

As a device for preventing such chemical liquid from rolling up, the present inventors have already formed an air curtain on the upstream side and downstream side of a fluid (chemical liquid) ejection nozzle and sprayed fluid in the space between them. A fluid 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 traveling body is greatly disturbed by the air curtain and tends to generate turbulence.

On the other hand, a spray nozzle for spraying a liquid (chemical solution) and an airflow injection port for injecting an airflow are provided, and an airflow is injected from the airflow injection port to the liquid sprayed from the spray nozzle. In addition, a liquid spray imparting device in which a spray nozzle and an air current spray port are arranged so that the sprayed liquid can be accelerated by the air stream and sprayed to the traveling body, and a liquid spray imparting method are disclosed ( (See Patent Document 2 or 3).
According to the liquid spray application device, it is possible to apply the liquid in a state in which the winding up to the downstream side is suppressed even in the accompanying flow having a large wind speed and wind pressure.
Japanese Utility Model Publication No. 01-152762 JP 2003-251259 A JP 2004-058031 A

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 scattering of the liquid cannot be sufficiently suppressed.
In particular, when liquid is applied to the traveling body by reciprocally scanning one nozzle device, an air flow is generated not only in the accompanying flow but also when the nozzle device is reciprocated, so the liquid is accelerated by the air flow ejected from the air flow injection port. It is not sufficient to spray the vehicle.

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

  The present invention has been made in view of the above circumstances, and a nozzle device that can reliably apply a chemical solution to a traveling body even in an ultra-high speed paper machine or the like, and can sufficiently suppress the scattering of the chemical solution, An object is to provide a method for applying a chemical solution and a chemical solution used.

  The inventors of the present invention have intensively studied to solve the above-described problems.As a result, the chemical solution is applied to the traveling body at a predetermined angle and air is supplied to 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 to be sprayed, and the present invention has been completed.

  That is, the nozzle device of the present invention is (1) a nozzle device for applying a chemical to a traveling body, and a discharge nozzle capable of discharging a chemical and an upstream of the discharge nozzle with respect to the traveling direction of the traveling body. A first spray nozzle located on the side 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 Any of the attachment nozzles can spray air, and the angle formed by the traveling direction of the traveling body and the discharge direction of the chemical liquid in the discharge nozzle is 30 to 135 degrees.

  The present invention resides in (2) the nozzle device according to (1), wherein an air blowing angle in the first blowing nozzle and / or the second blowing nozzle is adjustable.

  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 nozzle It exists in the nozzle apparatus of said (1) description whose angle made with the blowing direction of air is 45-90 degree | times.

  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 surface is perpendicular to the traveling body.

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

  The present invention resides in (6) the nozzle device according to the above (1), wherein the chemical liquid 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 (1), wherein the traveling body is a paper body or a canvas for drying the paper body.

  The present invention is an application method for applying a chemical solution to (8) a paper body provided in a paper machine or a canvas for drying the paper body, wherein the paper machine is any one of claims 1 to 7. The nozzle device according to claim 1 is provided, and the chemical liquid is applied to the paper body or canvas by which the chemical liquid is applied by the discharge nozzle and air is sprayed by the first spray nozzle and the second spray nozzle. Lies in the way.

  In the present invention, (9) 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 on the same plane. And the method for applying a chemical solution according to (8), wherein the surface is perpendicular to the traveling body.

  The present invention is (10) a wet paper strength agent, a cleaning agent, a pitch control agent, a stain prevention agent, or a release agent, which is applied using the nozzle device according to any one of (1) to (7) above. Exists in the chemical solution.

  This invention exists in the chemical | medical solution of the said (10) description whose viscosity is (11) 500 cps or less.

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 air blown from the second blowing nozzle suppresses the winding.

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

  In the above-described nozzle device, when the air spray angle in the first spray nozzle and / or the second spray nozzle can be adjusted, the chemical liquid can be more reliably applied to the traveling body. Further, the scattering of the chemical solution can be more reliably suppressed.

  In this case, the angle between 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 air blowing direction of the second blowing nozzle are It is preferable that the angle formed with the spraying direction is 45 to 90 degrees.

  In the nozzle device, when the traveling direction and the discharge direction are on the same surface and the surface is perpendicular to the traveling body, the chemical solution can be uniformly applied in the width direction of the traveling body. .

In the nozzle device described above, when the nozzle opening of the discharge nozzle has a slit shape, the area where the chemical solution can be applied at a time increases, so the number of nozzle devices can be reduced.
Further, even when the chemical device 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 where the chemical solution can be applied at a time, so that the nozzle device moves at a relatively low speed. be able to.

  In the nozzle device, when the chemical solution includes 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.

  In the nozzle device, it is more preferable that the traveling body is a paper body or a canvas for drying the paper body.

  The chemical liquid application method of the present invention includes the nozzle device described above, and the chemical liquid 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. Therefore, even in an ultra-high speed paper machine, the chemical solution can be reliably applied to the paper body or canvas, and the scattering of the chemical solution can be sufficiently suppressed.

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 discharge direction are on the same plane. If the surface is perpendicular to the traveling body, the chemical solution can be reliably applied to the paper body or canvas by performing reciprocal scanning even if the number of nozzle devices is one.
If the number of nozzle devices is one, maintenance is easy and cost is advantageous.

Since the chemical | medical solution of this invention is a washing | cleaning agent, a pitch control agent, a pollution inhibitor, or a mold release agent and is provided using the said nozzle apparatus, a chemical | medical solution can be reliably provided to a traveling body.
In addition, it can provide more reliably that the viscosity of the said chemical | medical solution is 500 cps or less.
Moreover, the traveling body to which the chemical solution is applied can surely exhibit a function based on the applied chemical solution.

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 an embodiment of the nozzle device of the present invention.
As shown in FIG. 1, a nozzle device 100 according to this embodiment includes a discharge nozzle 1 that can discharge a chemical solution, and a first spray nozzle 12 and a second spray nozzle 22 that are arranged in parallel to the discharge nozzle 1. With.
Each of the first spray nozzle 12 and the second spray nozzle 22 can spray air.

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, Next, a chemical solution is applied from the discharge nozzle 1, and finally air is sprayed from the second spray nozzle 22.

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

Specifically, 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.
Therefore, the chemical solution discharged from the slit 3 is discharged in a fan shape (in a divergent manner) with respect to the traveling body.

The discharge nozzle 1 is provided substantially at the center of the upper surface of a 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 feeding a chemical solution to the discharge nozzle 1 is provided inside the discharge nozzle body 2 and the arm portions 5a and 5b.
Such a supply pipe will be described later.

A spray nozzle body 10 having a U-shape is fitted to the lower end of the discharge nozzle body 2.
That is, the spray nozzle body 10 is separate from the discharge nozzle body 2 and is detachable from the discharge nozzle body 2.

The first spray nozzle 12 and the second spray nozzle 22 having a hemispherical shape are formed at upper ends on both sides of the spray nozzle body 10.
Similar to the slit 3, line-shaped slits 13 and 23 are provided above the first spray nozzle 12 and the second spray nozzle 22, respectively.
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 slits 13 and 23 is blown in a fan shape against the traveling body. become.

  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 perpendicular to the traveling direction A of the traveling body. The lines extend 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 more preferably 7 to 20 mm.
Further, 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, and more preferably 7 to 20 mm.
In addition, the said distance means the distance in a surface perpendicular | vertical to the discharge direction of a chemical | medical solution.

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 chemical solution is connected to the arm portion 5b. A discharge air supply pipe 8b for supplying air for discharging the air is connected.
Thereby, from the discharge nozzle 1, the said chemical | medical solution is discharged with the said 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 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.

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 discharge 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 discharge nozzle main body 2 from the discharge air flow path S2.

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.

4 is a cross-sectional view taken along 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 passage S <b> 3 inside the blowing nozzle main body 10 communicating with the blowing air supply pipe 7. To be sent to.

The air thus sent is divided into two parts inside the spray nozzle body 10 and is sent to each of the first spray nozzle 12 and the second spray nozzle 22.
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.

At this time, the air sprayed from the first spray nozzle 12 and the second spray nozzle 22 is sprayed in a direction having a predetermined angle with respect to the discharge direction of the chemical liquid in the discharge nozzle 1. .
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.

The nozzle device 100 according to the present embodiment is arranged 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 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 θ1 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 is 30 to 90 degrees. It is preferable that it is 30 to 60 degrees.

  If the angle θ1 formed by 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 to be insufficiently applied to the traveling body, and the angle θ1 is 90 degrees. If the angle θ1 exceeds the range, the chemical solution discharged by the accompanying flow tends to be wound up and scattered more easily than in the case where the angle θ1 is within the above range.

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

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 not suppressed by the first spray nozzle 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 blowing nozzle 22 suppresses the winding.

  An 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 45 to 90 degrees, and preferably 60 to 90 degrees.

  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 wake flow is compared with the case where the angle θ2 is within the above range. If the angle θ2 exceeds 90 degrees, the air blown from the first blowing nozzle 12 and the discharge from the discharge nozzle 1 are discharged as compared with the case where the angle is in the above range. As a result, the accompanying flow generated between the liquid and the chemical liquid to be discharged tends to increase, and the discharged chemical liquid tends to scatter.

  An angle θ3 formed by the traveling direction A of the traveling body and the air blowing direction D3 of the second blowing nozzle 22 is 45 to 90 degrees, and preferably 60 to 90 degrees.

  When the angle θ3 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 first angle θ3 is within the above range. The chemical liquid to be discharged tends to be wound up by a slight accompanying flow generated between the air sprayed from the spray nozzle 12 and the chemical liquid discharged from the discharge nozzle 1, and the angle θ3 is 90 degrees. When the angle exceeds 3, the chemical liquid to be rolled up tends not to be sufficiently suppressed as compared with the case where the angle θ3 is within the above range.

  Therefore, when the angles θ1, θ2, and θ3 are all 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.

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 chemical solution 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.

Moreover, it is preferable that the traveling direction A and the discharge direction D1 are on the same plane, and 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 θ2 and θ3 of blowing air from the first blowing nozzle 12 and the second blowing nozzle 22 can be appropriately adjusted within the above range.
The means for changing the angles θ2 and θ3 is not particularly limited. For example, the first spray nozzle 12 and the second spray nozzle 22 are detachable from the spray nozzle body 10, and the first spray The nozzle 12 and the second spray nozzle 22 may be replaced with a spray nozzle in which slits are formed at positions where the angles θ2 and θ3 change.

6A and 6B are front views showing an example of a spray nozzle of the nozzle device according to the present embodiment.
As shown in FIG. 6A, for example, the first spray nozzle and the second spray nozzle in which the direction of the slit is in the upper left direction, It can be replaced with a first spray nozzle and a second spray nozzle whose direction is the upper right.
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 θ2 and θ3 change is fixed.

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.
As shown in FIG. 7, 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 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 receives a chemical solution toward the traveling body 40 in the driving device 43. It is attached to 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.

  At this time, a scanning means for reciprocating the nozzle device is attached to the paper machine, the scanning direction is orthogonal to the traveling direction of the paper body or canvas, the traveling direction and the discharge direction are on the same plane, and It is preferable that the surface is perpendicular to the traveling body.

Then, 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 liquid is discharged from the nozzle device 100 toward the traveling body 40, thereby causing the traveling body 30 to move 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 sprayed by the first spray nozzle and the second spray nozzle.

  Therefore, according to the chemical solution application method, since the nozzle device described above is used, the chemical solution can be reliably applied to the traveling body even in an ultra-high speed paper machine, and the scattering of the chemical solution can be sufficiently suppressed.

In the nozzle device 100, the nozzle opening of the discharge nozzle has a slit shape.
The area which can provide a chemical | medical solution at once from this becomes large.
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.

At this time, it is preferable that the scanning direction of the nozzle device 100 and the traveling direction of the traveling body 40 are 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.

  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.

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 for a paper body or a canvas for drying the paper body.
Generally, since the paper body and canvas in a paper machine travel at high speed, the effect of the nozzle device of the present invention can be further exhibited.

It is preferable that the said chemical | medical solution is a washing | cleaning agent, a pitch control agent, a pollution inhibitor, or a mold release agent.
In this case, the chemical solution can be reliably applied to the traveling body.

The viscosity of the chemical solution is preferably 500 cps or less at normal temperature (25 ° C.).
When the viscosity exceeds 500 cps, as compared with 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 fear.
In this case, the chemical solution is not sufficiently discharged, or the spray nozzle does not function sufficiently, so that the chemical solution cannot be sufficiently applied to the traveling body, and scattering tends to occur.

The viscosity is more preferably 1 to 200 cps.
In this case, the chemical solution can be reliably applied to the traveling body.
Therefore, the function based on the chemical | medical solution provided can be exhibited reliably.

The proportion of the solid contained in the chemical solution is preferably 50% by mass or less, and 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 and the slit of the spray nozzle and clogging the solid matter contained in the chemical liquid.

  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, the discharge nozzle 1, the first spray nozzle, and the second spray nozzle are arranged in a line with respect to the traveling direction A. There is no need.

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

  Further, the discharge nozzle 1, the first spray nozzle, and the second spray nozzle all have a hemispherical shape, but may have a square shape, a triangular shape, or the like. There is no particular limitation.

  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.

  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, but a plurality of nozzle devices 100 may be attached to the paper machine. .

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, a plurality of driving devices 43 that reciprocate in the length direction of the scanning means 30 are attached to the scanning means 30 in the paper machine, 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. 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 may be attached to the main body 70.
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 thus 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).
A traveling body (not shown) travels in the direction of arrow A (traveling direction).

  Hereinafter, although the chemical | medical solution provision method using the nozzle apparatus of this invention is demonstrated concretely, this invention 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 disposed, and a chemical solution (Durscreen R409S, mold release agent, viscosity 3 cps, Mentec Co., Ltd.) is disposed from the tip of the discharge nozzle 1 of the nozzle device 100. 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 on the upstream side of the wind sent from the air knife 62.

  At this time, an angle θ1 formed 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 spray direction D2 between the acrylic plate 60 and the first spray nozzle 12 is formed. The angle θ2 is set to 60 degrees, and the angle θ3 formed between the acrylic plate 60 and the air blowing direction D3 in the second blowing nozzle 22 is set to 45 degrees.

And while sending the wind of 16.6 m / s of wind speed from the air knife 62, a chemical | medical solution is discharged from the discharge nozzle 1 of the nozzle apparatus 100, and air is sprayed from the 1st spray nozzle 12 and the 2nd spray nozzle 22. It was.
The discharge condition of the chemical solution from the discharge nozzle 1 was 0.1 MPa, and the discharge amount was 20 ml / min.
Moreover, the blowing condition of the air from the 1st blowing nozzle 12 and the 2nd blowing nozzle 22 was 0.5 MPa.

(Examples 2 to 19 and Comparative Examples 1 and 2)
The chemical solution is discharged from the discharge nozzle 1 of the nozzle device 100 in the same manner as in Example 1 except that the angles θ1, θ2, and θ3 are set to the angles (unit: degrees) as shown in Table 1, and the first spray nozzle Air was blown from the 12 and second blowing nozzles 22.

[Table 1]

[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 liquid refers to the length of the chemical liquid applied in a direction perpendicular to the flow of the wind sent from the air knife 62.
The obtained results are shown in Table 2.

[Table 2]

As is apparent from Table 2, Examples 1 to 19 using the nozzle device according to the present invention can sufficiently apply the chemical solution to the acrylic plate 60 as compared with Comparative Examples 1 and 2 that do not depend on the present invention. all right.
In particular, in Example 10 in which θ1 was 45 degrees, θ2 was 60 degrees, and θ3 was 75 degrees, extremely excellent results were shown.

  From the above results, according to the nozzle device of the present invention, it was confirmed that even in an ultra-high speed paper machine or the like, the chemical solution can be reliably applied to the traveling body and the scattering of the chemical solution can be sufficiently suppressed.

[Method for evaluating chemicals]
(Adhesion of chemicals)
WS4052 (wet paper strength agent, solid mass 30% by weight, 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. It adjusted and it was set as the chemical | medical 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.

This 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 one with a lot of solid matter attached to the nozzle device. “C”.
Further, the application width (unit: cm) after continuous discharge for 1 week or 6 weeks was measured in the same manner as described above.
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, particularly preferably 200 cps or less, the chemical solution can be reliably applied to the traveling body, and the chemical solution is reattached and solid matter is present at the nozzle opening. It was found that adhesion can be reliably suppressed.

FIG. 1 is a top view showing an embodiment of the nozzle device of the present invention. 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 of the nozzle device shown in 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 the angle between the chemical solution discharged from the nozzle device according to the present embodiment and the traveling body. 6A and 6B are front views showing an example of a spray nozzle 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. 8 is a schematic diagram showing a test apparatus used in the examples. 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. 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.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Discharge nozzle 2 ... Discharge nozzle main body 3, 13, 23 ... Slit 5a, 5b ... Arm part 7 ... Blowing air supply pipe 8a ... Chemical solution supply pipe 8b ... Discharge Air supply pipe 10 ... Spray nozzle body 12 ... First spray nozzle 22 ... Second spray nozzle 30 ... Scanning means 40 ... Traveling body 43 ... Driving device 45 ... Drum 50 ... Paper machine 60 ... Acrylic plate 62 ... Air knife 70 ... Main body 100 ... Nozzle device A ... Running direction D1 ... Discharge direction of chemical solution D2, D3 ..Air blowing direction L ... Distance S1 ... Chemical liquid flow path S2 ... Discharge air flow path S3 ... Air flow path

Claims (11)

A nozzle device for applying a chemical to a traveling body,
A discharge nozzle capable of discharging the chemical liquid;
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 downstream 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 liquid in the discharge nozzle is 30 to 135 degrees.   2. The nozzle device according to claim 1, wherein an air spray angle of the first spray nozzle and / or the second spray nozzle is adjustable.   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 air blowing direction of the traveling body and the second blowing nozzle is blown. The nozzle device according to claim 1, wherein an angle formed with the attaching direction is 45 to 90 degrees.   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.   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 contains a cleaning agent, a pitch control agent, a contamination inhibitor, or a release agent.   The nozzle device according to claim 1, wherein the traveling body is a paper body or a canvas for drying the paper body. An application method for applying a chemical solution to a paper body provided in a paper machine, or a canvas for drying the paper body,
The paper machine comprises the nozzle device according to any one of claims 1 to 7,
Application of the chemical liquid, wherein the chemical liquid is applied to the paper body or the canvas by the discharge nozzle and air is sprayed by the first spray nozzle and the second spray nozzle. Method. A scanning means for reciprocating the nozzle device is attached to the paper machine,
The scanning direction is orthogonal to the paper body or the traveling direction of the canvas,
9. The method for applying a chemical solution according to claim 8, wherein the traveling direction and the discharge direction are on the same plane, and the surface is perpendicular to the traveling body. 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.   The chemical solution according to claim 10, wherein the viscosity is 500 cps or less.

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