JPH04370287A - Shower washing apparatus - Google Patents

Abstract

PURPOSE:To suppress the generation of splash liquid from a splash recovery box by placing air nozzles in specific state and blowing high-pressure air flows from the nozzles against the inlet side and the outlet side of the filter nets of the splash recovery box. CONSTITUTION:Air nozzles 24, 25 are placed at the inlet side and the outlet side of a filter net of a splash recovery box 21 and a high-pressure air flow is blown along the moving line of the filter net 12 toward the inside of the splash recovery box. The splash about to be ejected from the inlet side and the outlet side of the filter net of the splash recovery box to the outer circumference is pushed back with the air flow and sealed in the splash recovery box.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shower cleaning device for a paper screen that circulates in a loop in a paper machine or the like.

[0002] In the present invention, the sieving net is not limited to wires, but includes anything that is substantially a loop-shaped circulating body and conveys paper raw material pulp, etc. on the outer surface of the loop.

0003

2. Description of the Related Art Generally, paper machine wires have fine fibers of paper pulp attached to them, so they are cleaned with a cleaning liquid jetted from a shower nozzle, as shown in FIGS. 5 and 6.

In the case shown in FIG. 5, a shower nozzle 2 is disposed outside the wire 1 circulating in a loop, and the shower nozzle 2 sprays high-pressure cleaning liquid from the outside of the wire 1 to the inside. A permeated liquid collection box 3 for collecting the permeated cleaning liquid is disposed at the outer side of each wire 1, and a rebound liquid collection box 4 for recovering the rebound cleaning liquid is placed outside each wire 1. Here, the permeate collection box 3 is equipped with a drainage line 5. The rebound liquid recovery box 4 is used as a vacuum chamber, and is equipped with a vacuum line 6 at the upper part and a drain line 7 at the lower part.

The one shown in FIG. 6 also has a shower nozzle 2 arranged outside the wire 1, a permeated liquid collection box 3 arranged inside the wire 1, and a rebound liquid collection box 4 arranged outside the wire 1. ing. Here, the difference between the one in FIG. 6 and the one in FIG. 5 is that the permeated liquid collection box 3 is used as a vacuum chamber, the upper part of the permeated liquid collection box 3 is equipped with a vacuum line 6, the lower part is equipped with a drainage line, and a vacuum chamber is provided. The reason is that the return liquid collection box 4 is provided with a drain line 5.

It is important to keep the outer surface of the loop, on which paper raw material pulp, etc. is placed, clean in the case of a sieving screen such as the wire 1, and therefore, the shower nozzle 2 is
As shown in FIGS. 5 and 6, high-pressure cleaning liquid is sprayed from the outside of the wire 1 toward the inside.

[0007]

[Problems to be Solved by the Invention] In the above-mentioned shower cleaning device, when the high-pressure cleaning liquid ejected from the shower nozzle 2 collides with the wire 1, 2/3 to 3/5 of it passes through the wire 1; 1/3 to 2/5 does not pass through the wire 1 and bounces back, becoming a droplet along the running line of the wire 1. This splashed liquid contains fine fibers or fillers, so if it is not collected immediately, it will stain the surrounding area, or it will accumulate as filth and then fall onto the wet paper, causing paper breakage. becomes.

However, in the conventional structure shown in FIG. 5, even if the suction force of the vacuum line 6 provided in the splashed liquid collection box 4 is strong, the splashed liquid from the wire 1 is As a result, it has not been possible to resolve the situation in which the rebound liquid flows out from the wire inlet and wire outlet sides of the recoil collection box 4 to the periphery.

Furthermore, in the conventional structure shown in FIG. 6, the permeated liquid collection box 3 inside the wire 1 is used as a vacuum chamber, and higher pressure cleaning liquid is ejected from the shower nozzle 2 outside the wire 1 to promote permeation of the cleaning liquid. However, in this case,
The higher-pressure cleaning liquid collides with the wire 1 and instead bounces back violently, making it impossible to effectively reduce the generation of splashed liquid from the rebounding liquid collection box 4.

[0010] An object of the present invention is to reduce the generation of splashed liquid from a splashed liquid collection box.

[0011]

[Means for Solving the Problems] The present invention provides a shower nozzle that is arranged on the outside of a sieving screen that circulates in a loop, and sprays a high-pressure cleaning liquid from the outside of the sieving screen toward the inside using the shower nozzle. A shower cleaning device comprising: a permeated liquid collection box for collecting permeated cleaning liquid inside the sieving screen; and a splattered liquid collection box for collecting rebound cleaning liquid outside the sieving screen; An air nozzle is provided on each of the screen inlet side and the screen exit side of the liquid collection box, which blows high-pressure air toward the inside of the rebound liquid collection box along the running line of the screen over the entire width of the screen. It was installed.

0012

[Operation] According to the present invention, after being sprayed from the shower nozzle, the droplets collide with the sieve screen and bounce back, and then are about to be ejected into the surrounding area from the sieve screen entry side and the sieve exit side of the rebound liquid collection box. The liquid is sealed by being pushed back into the rebound liquid collection box by high pressure air from air nozzles installed on the inlet and outlet sides. Therefore, the generation of splashed liquid from the rebound liquid collection box can be reduced, and the occurrence of surrounding contamination etc. can be reliably prevented.

[0013]

[Embodiment] FIG. 1 is a side sectional view showing a shower cleaning device according to an embodiment of the present invention, FIG. 2 is a front view of FIG. 1, FIG. 3 is a piping system diagram of the shower cleaning device, and FIG. 4 is a shower cleaning device 1 is a schematic diagram showing a paper machine to which this is applied.

The paper machine 10 sequentially transfers paper raw material pulp supplied from a paper stock supply device 11 onto a forming wire 12, a backing wire 13, a transfer felt 14, etc., to form a paper layer. A shower cleaning device 15 is installed in the middle of the loop-shaped circulation line of the wires 12 and 13. The shower cleaning device 15 provided on the forming wire 12 will be described below, but the same applies to the shower cleaning device 15 provided on the backing wire 13.

The shower cleaning device 15 has a shower nozzle 16 arranged outside the wire 12, as shown in FIGS. 1 and 2. The shower nozzle 16 sprays high-pressure cleaning liquid from the outside to the inside of the wire 12. Specifically, the shower nozzle 16 has nozzle openings with a diameter of about 1 mm at regular intervals, and spouts high-pressure cleaning water of 15 kg/cm2 or more while traversing uniformly along the width direction of the wire 12. .

The shower cleaning device 15 has a permeated liquid recovery box 17 arranged inside the wire 12 to collect the permeated cleaning liquid. The permeated liquid collection box 17 is provided with a drain line 18 at the bottom thereof and a guide plate 19 that guides the permeated liquid toward the drain line 18 side.

The shower cleaning device 15 has a rebound liquid collection box 21 arranged outside the wire 12 to collect the rebound cleaning liquid. The rebound liquid recovery box 21 is a vacuum chamber, and is equipped with a vacuum line 22 at the top and a drain line 23 at the bottom.

However, the shower cleaning device 15 has a wire inlet side and a wire outlet side of the rebound liquid collection box 21, respectively.
Air nozzles 24 and 25 are installed along the running line of the wire 12 to blow high-pressure air toward the inside of the rebound liquid collection box 21 over the entire width of the wire 12. Air nozzle 24
, 25 are opened to the air chambers 24A, 25A,
High-pressure air is blown at a wind speed equal to or slightly higher than the traveling speed of the wire 12, and the splashed liquid flowing together with the wire 12 is sealed in such a way as to push it back into the splashed liquid collection box 21.

In the shower cleaning device 15, as shown in FIG.
A single blower 26 serves as a high-pressure air generation source for the air conditioner 5.

That is, the vacuum line 22 of the rebound liquid recovery box 21 is connected to the suction port of the blower 26 via the gas-liquid separator 27.
is connected, the gas and liquid (air and cleaning liquid) in the rebound liquid collection box 21 sucked by the vacuum line 22 are separated by the gas-liquid separator 27, and the separated cleaning liquid is transferred to the seal pit 28.
is leading to A rebound liquid collection box 2 is installed in the seal pit 28.
1 drain line 23, permeate collection box 17 drain line 1
8 is also connected. Further, air nozzles 24 and 25 are connected to the discharge port of the blower 26.

Further, a vacuum control valve 31 is interposed in the suction line of the blower 26, so that the pressure in the vacuum chamber of the rebound liquid recovery box 21 can be adjusted. Also, blower 26
An air pressure regulating valve 32 is interposed in the discharge line, and the speed of the air blowing from the air nozzles 24 and 25 can be adjusted. The pressure in the vacuum chamber of the rebound liquid recovery box 21 and the speed of the air blowing from the air nozzles 24 and 25 are set in accordance with the machine speed and machine width.

Next, the operation of the above embodiment will be explained.

According to the above embodiment, the shower nozzle 16
After being sprayed from the wire 12, the splashed liquid collides with the wire 12 and rebounds, and then is about to be sprayed out from the wire inlet side and the wire outlet side of the rebound liquid collection box 21 to the surrounding area. The high-pressure air from the air nozzles 24 and 25 installed in the box generates a large pressure difference between the pressure inside the rebound liquid recovery box 21, which is used as a vacuum chamber, through the vacuum line 22. It is sealed by being pushed back into 21. Therefore, the generation of splashed liquid from the rebound liquid collection box 21 can be reduced, and the occurrence of surrounding contamination etc. can be reliably prevented.

Although the above embodiment is an example in which the present invention is applied to a case in which the rebound liquid collection box is used as a vacuum chamber, the present invention applies to a case in which the permeated liquid collection box is used as a vacuum chamber (the structure shown in FIG. 4). It can also be widely applied to

Table 1 shows the experimental results of the apparatus of the present invention shown in FIG. 1 in comparison with the conventional apparatus shown in FIG. According to Table 1, it is recognized that the apparatus of the present invention eliminates the generation of liquid droplets from the rebound liquid collection box.

[0026]

[Table 1]

[0027]

As described above, according to the present invention, the generation of splashed liquid from the rebound liquid collection box can be reduced.

[Brief explanation of drawings]

FIG. 1 is a side sectional view showing a shower cleaning device according to an embodiment of the present invention.

FIG. 2 is a front view of FIG. 1;

FIG. 3 is a piping system diagram of the shower cleaning device.

FIG. 4 is a schematic diagram showing a paper machine to which a shower cleaning device is applied.

FIG. 5 is a schematic diagram showing a conventional structure.

FIG. 6 is a schematic diagram showing another conventional structure.

[Explanation of symbols]

12, 13 Wire (filtered net) 15　Shower cleaning device 16 Shower nozzle 17 Permeate collection box 21 Bouncing liquid collection box 24, 25 Air nozzle

Claims (1)

[Claims] Claim 1: A shower nozzle is arranged on the outside of a sieving screen that circulates in a loop, and the shower nozzle sprays a high-pressure cleaning liquid from the outside of the sieving screen inward. In a shower cleaning device, a permeated liquid collection box is disposed to collect the permeated liquid, and a rebound liquid collection box is arranged outside the screen to collect the rebound cleaning liquid. and an air nozzle installed on each of the exit side of the sieve screen and blows high-pressure air toward the inside of the rebound liquid collection box along the running line of the sieve screen over the entire width of the sieve screen. cleaning equipment.