JP6429703B2 - Nozzle device, chemical solution spraying method and chemical solution using the same - Google Patents

Description

  The present invention relates to a nozzle device, a chemical solution spraying method using the nozzle device, and a chemical solution. More specifically, the chemical solution can be applied to the traveling body at a higher adhesion rate, and the chemical solution adheres to the nozzle portion. The present invention relates to a nozzle device that can be prevented as much as possible, a chemical liquid spraying method using the nozzle device, and a chemical liquid used in the chemical liquid spraying method.

  Conventionally, in the paper industry, pulp materials (including waste paper pulp) are used for paper machine wires, felts, dryer rolls, canvases, rolls that guide canvases, calendar rolls, paper rolls, breaker stacks, and other members. A chemical solution containing a chemical such as a cleaning agent, a pitch control agent, an antifouling agent, or a mold release agent is applied for the purpose of preventing the transfer of foreign substances from the origin or improving paper separation.

  These chemicals are generally in a state where the paper machine is in operation, from a nozzle of a nozzle device attached to the paper machine, a paper body, a wire, a felt, a dryer roll, a canvas, a roll for guiding a canvas, a calendar roll, It is given to a paper roll, a breaker stack, etc. (hereinafter referred to as “running body”).

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 the chemical liquid from rolling up, 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, and a traveling direction of the traveling body. And a second spray nozzle located on the downstream side of the discharge nozzle, both the first spray nozzle and the second spray nozzle can spray air, and the traveling direction of the traveling body There is known a nozzle device in which an angle formed by the discharge direction of the chemical liquid in the discharge nozzle is 30 to 135 degrees (see, for example, Patent Document 1).
According to such a nozzle device, the chemical liquid is reliably applied to the traveling body even in an ultra-high speed paper machine or the like by blowing air from the first blowing nozzle and the second blowing nozzle to the accompanying flow. And the scattering of the chemical solution can be sufficiently suppressed.

JP 2008-18424 A

However, in the nozzle device described in Patent Document 1 described above, the chemical solution is sprayed onto the traveling body, but the adhesion rate is not sufficient.
In addition, the nozzle device has a drawback that the discharged chemical liquid is rolled up and easily adhered to the periphery of the nozzle portion. In this case, the solid content of the attached chemical solution grows with time, and there is a possibility that the discharge from the nozzle portion may be hindered.

  The present invention has been made in view of the above circumstances, a nozzle device that can apply a chemical solution to a traveling body with a higher adhesion rate and can prevent the chemical solution from adhering to the nozzle portion as much as possible. And the chemical | medical solution spraying method which can provide a chemical | medical solution to a traveling body with a higher adhesion rate, and the clogging of a nozzle can be suppressed, and a chemical | medical solution can be provided to a traveling body with a higher adhesion rate The purpose is to provide a chemical solution.

The present inventors have intensively studied to solve the above-mentioned problem, but rather than blowing air toward the accompanying flow, the chemical liquid discharged from the nozzle portion is made compact and the impact at the time of application to the traveling body is improved. In fact, it was found that the adhesion rate of the chemical solution was increased.
Moreover, in order to prevent a chemical | medical solution from adhering to a nozzle part, it thought that air was sprayed to the nozzle part vicinity.
Then, air is blown in parallel with the discharge direction of the chemical solution from the nozzle portion from the first and second perpendicular slits, and air is blown toward the nozzle portion side from the first and second oblique slits. By configuring as described above, the present inventors have found that the above problems can be solved, and have completed the present invention.

  The present invention is (1) a nozzle device for applying a chemical solution to a traveling body, a nozzle portion capable of discharging a chemical solution, and a first nozzle positioned upstream of the nozzle portion with respect to the traveling direction of the traveling body. 1 cap, and a second cap located downstream of the nozzle portion with respect to the traveling direction of the traveling body, the first cap is provided with a first orthogonal slit and a first oblique slit, The second cap is provided with a second orthogonal slit and a second oblique slit. By supplying air to the first cap, the first cap is parallel to the discharge direction of the chemical from the nozzle portion. Air is blown to the nozzle part, and air is blown toward the nozzle part from the first oblique slit. By supplying air to the second cap, the chemical liquid is discharged from the nozzle part from the second orthogonal slit. Parallel to direction Ah is blown from the second oblique slit resides in a nozzle apparatus air is blown toward the nozzle side.

  The present invention comprises (2) a first housing portion having a nozzle portion, in which a chemical liquid circulates, and a second housing portion having a first cap and a second cap, in which air circulates. The nozzle device according to the above (1), wherein the second housing part has a U shape having a recess in the center in a side view, and the first housing part is fitted in the recess of the second housing.

  In the present invention, (3) an inflow port for air to flow in is provided on the bottom surface of the second housing, and the first orthogonal slit, the first oblique slit, the second orthogonal slit, and the second oblique slit are provided. The sum of the cross-sectional areas exists in the nozzle device according to the above (2), which is equal to or smaller than the cross-sectional area of the inlet.

  The present invention resides in (4) the nozzle device according to (1) or (2), wherein the first cap and the second cap have a symmetrical structure with the nozzle portion as a center.

  In the present invention, (5) the first orthogonal slit, the first oblique slit, the second orthogonal slit, and the second oblique slit are linear holes extending in a direction perpendicular to the traveling direction of the traveling body (1 ) To the nozzle device according to any one of (4).

  According to the present invention, (6) the intersection of the blowing direction of the air blown from the first skew slit and the blowing direction of the air blown from the second skew slit is on the discharge direction of the chemical solution from the nozzle portion. (1) It exists in the nozzle apparatus as described in any one of (5).

  The present invention resides in (7) the nozzle device according to (6), wherein the intersection point is in a range of ± 10 mm from the nozzle opening of the nozzle portion.

  According to the present invention, (8) the angle formed by the discharge direction of the chemical solution from the nozzle portion and the blowing direction of the air blown from the first skew slit, the discharge direction of the chemical solution from the nozzle portion, and the second skew In the nozzle device according to any one of the above (1) to (7), an angle formed by a blowing direction of air blown from the slit is 30 ° to 45 °.

  The present invention is (9) a method for spraying a chemical solution using the nozzle device according to any one of (1) to (8) above, wherein the traveling direction of the traveling body and the discharge of the chemical solution from the nozzle portion Spraying the chemical solution with an angle between the nozzle portion of the nozzle portion and the intersection of the traveling direction of the traveling body and the discharge direction of the chemical solution from the nozzle portion being 50 mm to 200 mm. Lies in the way.

  The present invention resides in (10) a method for spraying a chemical solution according to the above (9) used for a dryer roll, a canvas, a roll for guiding a canvas, a calendar roll, a paper roll, and a breaker stack.

  This invention exists in the chemical | medical solution which is used for the spraying method of the chemical | medical solution as described in (11) said (10) or (11), and whose viscosity is 1-500 cps.

In the nozzle device of the present invention, the first orthogonal slit of the nozzle portion is provided on the upstream side and the second orthogonal slit of the nozzle portion is provided on the downstream side with respect to the traveling direction of the traveling body, and the chemical solution is discharged from the nozzle portion. By spraying air from the first orthogonal slit and the second orthogonal slit so as to be parallel to the direction, the spray width of the chemical solution in the traveling direction of the traveling body can be reduced.
Thereby, while the chemical | medical solution discharged from a nozzle part becomes compact, since the chemical | medical solution which flies is accelerated by the air from both sides, the impact at the time of the provision to a traveling body can be improved. As a result, it is possible to apply the chemical liquid to the traveling body with a higher adhesion rate.

In the nozzle device of the present invention, the first oblique slit is provided on the upstream side of the nozzle portion, the second oblique slit is provided on the downstream side of the nozzle portion with respect to the traveling direction of the traveling body, and the first oblique slit is provided. In addition, by blowing air from the second oblique slit toward the nozzle portion side (that is, from both sides of the nozzle portion), it is possible to suppress the discharged chemical liquid from rolling up and adhering to the periphery of the nozzle portion.
Thereby, it is possible to prevent the discharge failure of the chemical liquid due to the solid content of the chemical liquid adhering to the nozzle portion growing over time.

In the nozzle device of the present invention, the first housing portion having the nozzle portion is fitted into the recess of the second housing having the first cap and the second cap, so that the device can be made compact.
Further, the first cap and the second cap can be easily arranged on both sides of the nozzle portion.

Here, an inlet through which air flows is provided on the bottom surface of the second housing, and the sum of the cross-sectional areas of the first orthogonal slit, the first oblique slit, the second orthogonal slit, and the second oblique slit. However, when it is less than the cross-sectional area of the inlet, the pressure of the air to be blown (hereinafter referred to as “air pressure”) can be sufficiently increased.
Thereby, the impact at the time of the provision to the traveling body of a chemical | medical solution can be improved more.
At the same time, it is possible to further suppress the discharged chemical liquid from adhering to the nozzle portion.

In the nozzle device of the present invention, since the first cap and the second cap have a symmetrical structure with the nozzle portion as the center, the first cap and the second cap can be used even if the upstream and downstream directions of the nozzle device are reversed. it can.
In addition, since both the first cap and the second cap can be manufactured with one mold, the manufacturing cost can be reduced.

In the nozzle device of the present invention, when the first orthogonal slit, the first oblique slit, the second orthogonal slit and the second oblique slit are linear holes extending in a direction perpendicular to the traveling direction of the traveling body, Air can be widely blown in a direction perpendicular to the traveling direction of the traveling body.
Thereby, it can prevent reliably that a chemical | medical solution is scattered in the running direction of a running body.

In the nozzle device of the present invention, the intersection of the blowing direction of air blown from the first skewed slit and the blowing direction of air blown from the second skewed slit is on the discharge direction of the chemical solution from the nozzle portion. In this case, since the air is uniformly blown from both sides of the nozzle portion, it is possible to efficiently suppress the chemical liquid from adhering to the nozzle portion.
In addition, after the air blown from the first oblique slit and the air blown from the second oblique slit collide in the discharge direction of the chemical solution, the air moves forward, so the momentum of the flying chemical solution Can be accelerated.
The intersection is most effective when it is within a range of ± 10 mm from the nozzle opening of the nozzle portion.

  In the nozzle device of the present invention, the angle formed by the discharge direction of the chemical solution from the nozzle portion and the blowing direction of the air blown from the first oblique slit, the discharge direction of the chemical solution from the nozzle portion, and the second oblique direction When the angle formed by the blowing direction of the air blown from the row slits is both 30 ° to 45 °, it is possible to more effectively suppress the chemical liquid from adhering to the nozzle portion, and the first oblique slit After the air blown from the air and the air blown from the second oblique slit collide, the air can surely be directed forward.

The chemical solution spraying method of the present invention uses the nozzle device described above, and the angle formed by the traveling direction of the traveling body and the discharge direction of the chemical solution from the nozzle portion is 30 ° to 90 °, and from the nozzle opening of the nozzle portion, When the distance to the intersection of the traveling direction of the traveling body and the discharge direction of the chemical liquid from the nozzle portion is 50 mm to 200 mm, the chemical liquid can be applied to the traveling body with a higher adhesion rate.
Moreover, the said chemical | medical solution spraying method is more effective when it uses for the roll which rolls a paper machine as a running body, a canvas, a canvas which guides a canvas, a calendar roll, a paper roll, or a breaker stack.

The chemical solution of the present invention is used in the chemical solution spraying method described above and has a viscosity of 1 to 500 cps, so that clogging of the nozzle can be suppressed, and the chemical solution can be applied to the traveling body with a higher adhesion rate. It becomes possible.
In addition, the traveling body to which the chemical solution is applied reliably exhibits the function based on the applied chemical solution.

FIG. 1 is a top view showing an embodiment of a nozzle device according to 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. Drawing 5 is an explanatory view for explaining the blowing direction of the air in one embodiment of the nozzle device concerning the present invention. FIG. 6 is an explanatory diagram for explaining the positional relationship between the nozzle portion and the traveling body in an embodiment of the chemical spraying method according to the present invention. FIG. 7 is a perspective view schematically showing an example in which the nozzle device used in the chemical spraying method according to the present invention is used in a paper machine. FIG. 8 is a perspective view schematically showing another embodiment in which the nozzle device according to the present invention is used in a paper machine. FIG. 9 is a perspective view schematically showing another embodiment in which the nozzle device according to the present invention is used in a paper machine. FIG. 10 is an explanatory diagram for explaining the evaluation method 1 in the embodiment of the nozzle device according to the present invention. FIG. 11 is an explanatory diagram for explaining an evaluation method 2 in the embodiment of the nozzle device according to the present invention.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings as necessary. In the drawings, the same elements are denoted by the same reference numerals, and redundant description is omitted. 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.

The nozzle device according to the present invention is a device for applying a chemical to a traveling body.
Here, examples of the traveling body include a paper body, a wire, a felt, a dryer roll, a canvas, a roll for guiding the canvas, a calendar roll, a paper roll, and a breaker stack. Among these, the traveling body is preferably a dryer roll, a canvas, a roll for guiding the canvas, a calendar roll, or a paper roll.
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.

FIG. 1 is a top view showing an embodiment of the nozzle device of the present invention.
As shown in FIG. 1, the nozzle device 100 according to the present embodiment includes a nozzle portion 1 that can discharge a chemical solution, and a first cap 12 and a second cap 22 that are arranged in parallel to the nozzle portion 1.
In the nozzle device 100, when a traveling body (not shown) travels in the direction of arrow A (hereinafter referred to as “traveling direction A”), a straight slit of the first cap 12 described later is first placed at a predetermined position of the traveling body. Air is blown from 13a, then a chemical solution is applied from the nozzle portion 1, and finally, air is blown from a second orthogonal slit 23a to be described later.
That is, in the nozzle device 100, the first cap 12 is located upstream of the nozzle portion 1 with respect to the traveling direction A of the traveling body, and the second cap 22 is the nozzle portion with respect to the traveling direction A of the traveling body. 1, the nozzle portion 1, the first cap 12, and the second cap 22 are arranged in a row with respect to the traveling direction A.

The nozzle unit 1 is a part that discharges a chemical solution to a traveling body (not shown).
The nozzle part 1 has a hollow hemispherical shape, and is provided with a discharge slit 3 at the top.
The discharge slit 3 is a straight hole extending in a direction perpendicular to the traveling direction A. For this reason, the chemical liquid discharged from the discharge slit 3 is discharged in a fan shape (in a divergent manner) and can be widely applied to the traveling body in the width direction of the traveling body (a direction perpendicular to the traveling direction). It has become.

The nozzle part 1 is provided in the approximate center of the upper surface of the rectangular parallelepiped first housing part 10. In addition, it is preferable to fix the nozzle part 1 with a bolt, welding, etc. so that it may not move, and to integrate with the 1st housing part 10. FIG.
The first housing part 10 is connected to arm parts 5a and 5b for supporting the first housing part 10 at both ends.
And the 1st housing part 10 and arm part 5a, 5b are provided with the chemical | medical solution supply pipe | tube for sending a chemical | medical solution to the nozzle part 1 in the inside.
That is, the 1st housing part 10 has the nozzle part 1, and a chemical | medical solution distribute | circulates the inside. The chemical solution supply pipe will be described later.

As for the 1st housing part 10, the 2nd housing part 20 is fitted by the lower end.
Specifically, the second housing part 20 has a U-shaped form having a concave part in the center in a side view, and the first housing part 10 is fitted in the concave part of the second housing part 20.
Thereby, an apparatus can be made compact.
Moreover, the 1st cap 12 and the 2nd cap 22 can be arrange | positioned easily at the both sides of a nozzle part.

And the 2nd housing part 20 is provided with the air supply pipe | tube for sending air into the inside.
That is, the second housing part 20 is configured such that air flows through the inside. The air supply pipe will be described later.
Moreover, the 1st housing part 10 and the 2nd housing part 20 are separate bodies, and are mutually detachable.

The 2nd housing part 20 is provided with the 1st cap 12 and the 2nd cap 22 which have a hollow hemispherical form in the upper end of the both sides of a recessed part. The first cap 12 and the second cap 22 are preferably fixed by welding or the like so as not to move and integrated with the second housing portion 20.
The first cap 12 is provided with a first orthogonal slit 13a and a first oblique slit 13b, and the second cap 22 is provided with a second orthogonal slit 23a and a second oblique slit 23b. Is provided.

In the first cap 12, air is blown from the first orthogonal slit 13 a so as to be parallel to the discharge direction of the chemical solution from the nozzle portion 1, and the first oblique direction toward the nozzle portion 1 side. Air is blown from the row slits 13b.
In the second cap 22, air is blown from the second orthogonal slit 23 a so as to be parallel to the discharge direction of the chemical solution from the nozzle portion 1, and the second oblique direction toward the nozzle portion 1 side. Air is blown from the row slits 23b.
Details of these will be described later.

In the nozzle device 100, the first orthogonal slit 13a, the first oblique slit 13b, the second orthogonal slit 23a, and the second oblique slit 23b are all provided in the corresponding first cap 12 or second cap 22. And a straight hole extending in a direction perpendicular to the traveling direction A of the traveling body. For this reason, the air blown from these slits is blown in the shape of a fan (in a divergent manner).
That is, these slits can widely blow air to the traveling body in the width direction of the traveling body.
Thereby, it can prevent reliably that a chemical | medical solution is scattered in the running direction of a running body.

Here, the lengths of the first orthogonal slit 13a, the first oblique slit 13b, the second orthogonal slit 23a, and the second oblique slit 23b in the top view are substantially the same, and the ejection slit 3 of the nozzle unit 1 is the same. It is larger than the length of the slit in the top view. Thereby, since air reliably pinches | interposes the chemical | medical solution discharged from both sides, it can suppress that a chemical | medical solution scatters.
The lengths of the first orthogonal slit 13a, the first oblique slit 13b, the second orthogonal slit 23a, and the second oblique slit 23b in the top view are the lengths of the slits in the top view of the discharge slit 3 of the nozzle unit 1. It is preferably at least twice the length.

In the nozzle device 100, the first cap 12 and the second cap 22 have a symmetrical structure with the nozzle portion 1 as the center. That is, the first cap 12 and the second cap 22 have the same structure except that the directions are reversed. For this reason, the nozzle device 100 can be used even if the upstream and downstream directions are reversed.
Moreover, since both the 1st cap 12 and the 2nd cap 22 can be manufactured by one type | mold, manufacturing cost can be reduced.

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 8 a for supplying a chemical solution to the first housing portion 10 is connected to the arm portion 5 a, and the arm portion 5 b has the above-described components. A discharge air supply pipe 8b for supplying air for discharging the chemical liquid is connected.
Thereby, in the nozzle part 1, the chemical liquid supplied from the chemical liquid supply pipe 8 a rides on the air supplied from the discharge air supply pipe 8 b and is discharged from the discharge slit 3.

On the other hand, an air supply pipe 7 for supplying air blown from the first cap 12 and the second cap 22 is connected to the lower end of the second housing part 20.
Thereby, in the first cap 12 and the second cap 22, the air supplied from the air supply pipe 7 is supplied to the first orthogonal slit 13a, the first oblique slit 13b, the second orthogonal slit 23a, and the second oblique slit 23b. Will be sprayed from.

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. Is formed.

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 1st housing part 10 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. Then, the air is sent from the discharge air flow path S2 to the first housing portion 10.

The chemical solution and air sent to the first housing portion 10 are mixed in the nozzle portion 1 and discharged from the discharge 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 air supply pipe 7 flows from the inlet 4 provided on the bottom surface of the second housing part 20 to the inside of the second housing part 20. To the air flow path S3.

Then, the air that has been sent is divided into two parts inside the second housing portion 20, and is sent to the first cap 12 and the second cap 22, respectively.
The sent air is blown from the first orthogonal slit 13a and the first oblique slit 13b of the first cap 12, and from the second orthogonal slit 23a and the second oblique slit 23b of the second cap 22. Become.

Here, in the nozzle device 100, the sum of the cross-sectional areas of the first orthogonal slit 13a, the first oblique slit 13b, the second orthogonal slit 23a, and the second oblique slit 23b is provided on the bottom surface of the second housing. The cross-sectional area of the inlet 4 is preferably equal to or less.
In this case, the pressure of the blowing air (hereinafter referred to as “air pressure”) can be sufficiently increased.

Drawing 5 is an explanatory view for explaining the blowing direction of the air in one embodiment of the nozzle device concerning the present invention.
As shown in FIG. 5, in the nozzle device 100, the chemical liquid is discharged from the nozzle portion 1 in a straight discharge direction B.
On the other hand, in the first orthogonal slit 13a of the first cap 12, air is blown in the blowing direction C1 parallel to the discharge direction B of the chemical liquid from the nozzle portion 1.
Similarly, in the second orthogonal slit 23 a of the second cap 22, air is blown in the blowing direction C <b> 2 that is parallel to the discharge direction B of the chemical liquid from the nozzle portion 2.
Therefore, in the nozzle device 100, the chemical liquid discharged from the nozzle unit 1 is upstream and downstream in the traveling direction of the traveling body by the air sprayed from the first orthogonal slit 13a and the air sprayed from the second orthogonal slit 23a. Can be prevented from being scattered.
Thereby, since the spreading | diffusion width | variety of the chemical | medical solution in the driving | running | working direction of a traveling body can be narrowed, while making a chemical | medical solution compact, the impact at the time of the provision to a traveling body can be improved. As a result, it is possible to apply the chemical liquid to the traveling body with a higher adhesion rate.

On the other hand, in the first oblique slit 13 b of the first cap 12, air is blown in the blowing direction D <b> 1 toward the nozzle portion 1.
Similarly, in the second oblique slit 23 b of the second cap 22, air is blown in the blowing direction D <b> 2 toward the nozzle portion 1.
That is, the nozzle portion 1 is blown with air from both sides. Thereby, it can suppress that the discharged chemical | medical solution rolls up and adheres to a nozzle part periphery.

Here, the intersection T between the blowing direction D1 of the air blown from the first skew slit 13b and the blowing direction D2 of the air blown from the second skewed slit 23b is above the discharge direction B of the chemical solution from the nozzle unit 1. It is preferable that it exists in.
In this case, since the nozzle part 1 will be sprayed air equally from both sides, it can suppress efficiently that a chemical | medical solution adheres to the nozzle part 1. FIG.
In addition, after the air blown from the first skew slit 13b and the air blown from the second skew slit 23b collide in the chemical solution discharge direction B, the air travels forward in the same direction as the chemical solution discharge direction B. As a result, the momentum of the flying chemical can be accelerated. Thereby, the impact at the time of the application to a traveling body can be improved more, As a result, it becomes possible to provide a chemical | medical solution with a still higher adhesion rate to a traveling body.

At this time, the intersection T between the blowing direction D1 of the air blown from the first skew slit 13b and the blowing direction D2 of the air blown from the second skewed slit 23b is ±± It is preferably in the range of 10 mm.
In this case, it can suppress more efficiently that a chemical | medical solution adheres to the nozzle part 1. FIG.

Further, the angle θ1 formed by the discharge direction B of the chemical solution from the nozzle portion 1 and the blowing direction D1 of the air blown from the first oblique slit 13b, the discharge direction B of the chemical solution from the nozzle portion 1, and the second It is preferable that the angle θ2 formed by the blowing direction of the air blown from the oblique slit 23b is 30 ° to 45 °. As described above, since the first cap 12 and the second cap 22 have a symmetrical structure around the nozzle portion 1, the angle θ1 and the angle θ2 are the same.
As a result, it is possible to more effectively suppress the chemical liquid from adhering to the nozzle portion 1, and the air blown from the first skew slit 13b collides with the air blown from the second skew slit 23b. Later, the air can surely be directed forward.

Next, the chemical spraying method according to the present embodiment will be described.
The nozzle device 100 described above is used in the chemical solution spraying method according to the present embodiment.
FIG. 6 is an explanatory diagram for explaining the positional relationship between the nozzle portion and the traveling body in an embodiment of the chemical spraying method according to the present invention.
As shown in FIG. 6, in the chemical spraying method according to the present embodiment, the angle θ3 formed by the traveling direction A of the traveling body and the discharge direction B of the chemical from the nozzle unit 1 is 30 ° to 90 °. It is preferable that it is 45-60 degrees.

  When the angle θ3 formed by the traveling direction A of the traveling body and the discharge direction B of the chemical liquid at the nozzle portion 1 is less than 30 degrees, the discharged chemical liquid tends to be insufficiently applied to the traveling body, and the angle θ3 is 90 degrees. If the angle θ3 exceeds the range, the chemical solution discharged by the accompanying flow tends to be wound up and easily scattered as compared with the case where the angle θ3 is within the above range.

In the chemical solution spraying method according to the present embodiment, the distance L from the tip of the nozzle portion 1 of the nozzle device 100 to the intersection T between the discharge direction B of the chemical solution and the traveling body is preferably 50 mm to 200 mm, preferably 80 mm to More preferably, it is 100 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 with a higher adhesion rate.

FIG. 7 is a perspective view schematically showing an example in which the nozzle device used in the chemical spraying method according to the present invention 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 as described above so that the discharged chemical liquid is sufficiently applied to the traveling body 40. ing.

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 solution is applied from the nozzle portion 1 of the nozzle device 100, and the first orthogonal slit 13a and the first oblique slit 13b of the first cap 12, and the second orthogonal slit 23a and the second of the second cap 22 are provided. Air is blown by the oblique slit 23b.

  Therefore, according to the chemical solution application method, since the nozzle device described above is used, the chemical solution can be applied to the traveling body with a higher adhesion rate even in an ultra-high speed paper machine.

Next, the chemical solution according to the present embodiment will be described.
It is preferable that the chemical | medical solution which concerns on this embodiment is a cleaning agent, a pitch control agent, a pollution inhibitor, or a mold release agent.
By spraying these chemicals on the traveling body, it is possible to improve the yield in paper manufacture of the paper machine.

Here, the viscosity of the chemical solution is preferably 1 to 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 solution is the nozzle port 1a of the nozzle unit 1, the first orthogonal slit 13a and the first oblique slit 13b of the first cap 12, Alternatively, the second cap 22 may adhere to the second orthogonal slit 23a and the second oblique slit 23b and clog them.
In this case, the chemical liquid is not sufficiently discharged or the air blowing does not sufficiently function, so that the chemical liquid 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, clogging of the nozzle opening can be suppressed, and the chemical solution can be applied to the traveling body with a higher adhesion rate.
In addition, the traveling body to which the chemical solution is applied reliably exhibits the function based on the applied chemical solution.

  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 embodiment, the nozzle unit 1 and the first cap 12 and the second cap 22 are arranged in a row with respect to the traveling direction A, but it is not necessarily in a row.
Moreover, in the nozzle apparatus 100, although the 1st housing part 10 and the 2nd housing part 20 are separate bodies, you may integrate.
Furthermore, although the nozzle part 1 and the 1st cap and the 2nd cap all have a hemispherical form, a square shape, a triangular shape, etc. may be sufficient and this form is not specifically limited.

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

In the embodiment in which the nozzle device according to this embodiment 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. 8 is a perspective view schematically showing another embodiment in which the nozzle device according to the present invention is used in a paper machine.
As shown in FIG. 8, the paper machine is provided with a plurality of driving devices 43 that reciprocate 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. 9 is a top view schematically showing another embodiment in which the nozzle device according to the present invention is used in a paper machine.
As shown in FIG. 9, 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 an 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.

(Examples 1-7 and Comparative Examples 1-4)
As shown in Table 1, the nozzle unit is provided with a nozzle unit, a first orthogonal slit, a first oblique slit, a second orthogonal slit, and a second oblique slit. What changed the angle of the blowing direction of the air sprayed from each slit with respect to the discharge direction of the chemical | medical solution to prepare was prepared.
In Table 1, “θ4” means an angle formed by the discharge direction of the chemical solution from the nozzle portion and the blowing direction of the air blown from the first orthogonal slit.
“Θ5” means an angle formed by the discharge direction of the chemical solution from the nozzle portion and the blowing direction of the air blown from the first oblique slit.
“Θ6” means an angle formed by the discharge direction of the chemical solution from the nozzle portion and the blowing direction of the air blown from the second orthogonal slit.
“Θ7” means an angle formed by the discharge direction of the chemical solution from the nozzle portion and the blowing direction of the air blown from the second oblique slit.
“None” means that there is no target oblique slit.
All angles are shown as acute angles.

(Table 1)

(Examples 8 to 20)
Next, using the nozzle device of Example 7, the distance between the intersection of the blowing direction of air blown from the first skew slit and the blowing direction of air blown from the second skew slit and the nozzle opening of the nozzle part The adjustment was made so that the values shown in Table 2 were obtained.
In Table 2, minus notation means that there is an intersection on the near side (opposite side of the traveling body) from the nozzle opening of the nozzle portion.

(Table 2)

(Examples 21 to 24)
Next, using the nozzle device of Example 16, the cross-sectional areas (mm ² ) of the first orthogonal slit, the first oblique slit, the second orthogonal slit, and the second oblique slit are adjusted to the values shown in Table 3. did.
The cross-sectional area of the inlet 4 (see FIG. 4) was 19.6 mm ² .

(Table 3)

(Evaluation method 1)
The nozzle devices of Examples 1 to 24 and Comparative Examples 1 to 4 were placed in a hermetic container P as shown in FIG. 10 under a temperature condition of 100 ° C., and continuously discharged with a chemical solution. As the chemical solution, Duscreen CMS8163L (manufactured by Mentec Co., Ltd., viscosity: 3.0 cps, residual solid component 8.6%, contamination inhibitor, manufactured by Mentec Co., Ltd.) was used.
Then, after 24 hours, the blocking rate (%) of the nozzle opening was calculated. That is, the larger numerical value means that it is blocked. The obtained results are shown in Tables 4 to 6, respectively.

(Evaluation method 2)
After performing the evaluation method 1, as shown in FIG. 11, the SUS board S was arrange | positioned on the weight meter M, and the wind W was sent along the surface direction of the SUS board S with the wind speed of 13 m / min.
The angle θ3 formed by the SUS plate S and the discharge direction of the chemical solution from the nozzle portion 1 is 45 °, and the distance L from the tip of the nozzle portion 1 to the intersection of the discharge direction of the chemical solution and the SUS plate S is 100 mm. The nozzle device was arranged so that the chemical solution was discharged.
After 1 minute, the weight of the chemical solution adhering to the SUS plate S was measured, and the adhesion rate (%) with respect to the spraying amount was calculated. That is, a larger numerical value means a larger amount of adhesion. The obtained results are shown in Tables 4 to 6, respectively.

(Table 4)

From the results shown in Table 4, when there is no oblique slit shown in the comparative example, the space between the cap and the nozzle part becomes negative pressure, and the scattered chemical liquid adheres to these, accumulates and accumulates them. It was found that the direct slit was closed.
Air was not blown from the closed straight slit, and the amount of adhesion to the object to be sprayed was greatly reduced.
On the other hand, when it has a 1st orthogonal slit, a 1st diagonal slit, a 2nd orthogonal slit, and a 2nd diagonal slit shown in an Example, it is reduced that the scattered chemical | medical solution adheres to these. Moreover, it has been found that the adhesion rate of the chemical solution is extremely improved.

(Table 5)

  From the results shown in Table 5, if the intersection of the first oblique slit and the second oblique slit is within a range of ± 10 mm from the nozzle opening of the nozzle portion, the scattered chemical solution adheres to the nozzle portion and the cap. It has been found that the adhesion rate of the chemical solution is greatly improved.

(Table 6)

From the results shown in Table 6, the sum of the cross-sectional areas (mm ² ) of the first orthogonal slit, the first oblique slit, the second orthogonal slit, and the second oblique slit is the cross-sectional area of the inlet 4 (see FIG. 4). In the following cases, it was found that the scattered chemical solution was reduced from adhering to the nozzle part and the cap, and the chemical solution adhesion rate was greatly improved.

The nozzle device of the present invention is suitably used as a device for applying a chemical to a traveling body in a paper machine. According to the nozzle device of the present invention, it is possible to apply the chemical liquid to the traveling body with a higher adhesion rate, and to prevent the chemical liquid from adhering to the nozzle portion as much as possible.
The chemical solution spraying method of the present invention is suitably used as a method of applying a chemical solution to a traveling body in a paper machine. According to the chemical solution spraying method of the present invention, the chemical solution can be applied to the traveling body with a higher adhesion rate.
The chemical | medical solution of this invention is used suitably as a chemical | medical solution provided with respect to the running body in a paper machine. According to the chemical | medical solution of this invention, clogging of a nozzle can be suppressed and a chemical | medical solution can be provided to a traveling body with a higher adhesion rate.

DESCRIPTION OF SYMBOLS 1 ... Nozzle part 1a ... Nozzle port 10 ... 1st housing part 12 ... 1st cap 13a ... 1st orthogonal slit 13b ... 1st diagonal slit 20 ... 2nd Housing part 22 ... 2nd cap 23a ... 2nd orthogonal slit 23b ... 2nd oblique slit 3 ... Discharge slit 4 ... Inlet 5a, 5b ... Arm part 7 ... Air supply pipe 8a ... Chemical liquid supply pipe 8b ... Discharge air supply pipe 30 ... Scanning means 40 ... Traveling body 43 ... Driving device 45 ... Drum 50 ... Paper machine 70 ... Main body 100 ... Nozzle device A ... Running direction B ... (chemical solution) discharge direction C1, C2, D1, D2 (air) blowing direction L ... distance M ...・ Weigh scale P ・ ・ ・ Sealed container S ・ ・ ・ SUS plate S1 ・ ・The chemical liquid flow path S2 ··· discharge air flow path S3 ··· air flow path W ··· wind

Claims (11)

A nozzle device for applying a chemical to a traveling body,
A nozzle part capable of discharging the chemical solution;
A first cap located on the upstream side of the nozzle portion with respect to the traveling direction of the traveling body;
A second cap located downstream of the nozzle portion with respect to the traveling direction of the traveling body;
With
The first cap is provided with a first orthogonal slit and a first oblique slit,
The second cap is provided with a second orthogonal slit and a second oblique slit,
By supplying air to the first cap, air is blown from the first orthogonal slit in parallel with the discharge direction of the chemical liquid from the nozzle portion, and from the first oblique slit, the nozzle portion Air is blown toward the side,
By supplying air to the second cap, air is blown from the second orthogonal slit in parallel with the discharge direction of the chemical liquid from the nozzle portion, and from the second oblique slit, the nozzle portion A nozzle device that blows air toward the side. A first housing part having the nozzle part, in which the chemical liquid flows;
A second housing part having the first cap and the second cap, in which air circulates;
The second housing part is U-shaped having a concave part in the center in a side view,
The nozzle device according to claim 1, wherein the first housing portion is fitted in the concave portion of the second housing. An inlet for air to flow in is provided on the bottom surface of the second housing,
3. The nozzle device according to claim 2, wherein a sum of sectional areas of the first orthogonal slit, the first oblique slit, the second orthogonal slit, and the second oblique slit is equal to or smaller than a sectional area of the inlet.   The nozzle device according to claim 1, wherein the first cap and the second cap have a symmetrical structure with the nozzle portion as a center.   The first straight slit, the first oblique slit, the second perpendicular slit, and the second oblique slit are linear holes extending in a direction perpendicular to the traveling direction of the traveling body. The nozzle device according to any one of the above.   The intersection of the spray direction of the air sprayed from the first skew slit and the spray direction of the air sprayed from the second skew slit is on the discharge direction of the chemical liquid from the nozzle portion. The nozzle device according to any one of 5.   The nozzle device according to claim 6, wherein the intersection point is within a range of ± 10 mm from the nozzle opening of the nozzle portion.   The angle formed by the discharge direction of the chemical solution from the nozzle portion and the blowing direction of air blown from the first skew slit, the discharge direction of the chemical solution from the nozzle portion, and the second skew slit The nozzle device according to any one of claims 1 to 7, wherein an angle formed with a blowing direction of air blown from each is 30 ° to 45 °. A method of spraying a chemical using the nozzle device according to any one of claims 1 to 8,
The angle formed by the traveling direction of the traveling body and the discharge direction of the chemical liquid from the nozzle portion is 30 ° to 90 °,
The chemical | medical solution spraying method which makes the distance from the nozzle opening of the said nozzle part to the intersection of the running direction of the said traveling body and the discharge direction of the said chemical | medical solution from the said nozzle part be 50 mm-200 mm.   The chemical | medical solution spraying method of Claim 9 used for the dryer roll of a paper machine, a canvas, the roll which guides a canvas, a calendar roll, a paper roll, or a breaker stack. The chemical solution spraying method according to claim 10 or 11,
A chemical solution having a viscosity of 1 to 500 cps.

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