JPS5861870A - Cleaning device for air containing paint mist in painting booth - Google Patents

Abstract

PURPOSE:To efficiently separate paint mist of small particle size by forming an arcuate recessed guide surface successively to a wall for flowing down cleaning water, and further forming an introduction passage for air containing paint mist along the upper end part of said guide surface. CONSTITUTION:Successively to a flowing-down wall 6, a recessed guide surface 5 for cleaning water W and paint-mist containing air A having a successive arcuate or similar surface which is perpendicular or nearly-perpendicular at an intermediate part of its vertical part and having tangents horizontal or slightly slanting to horizontal direction at the upper and lower ends of said surface. Furthermore, an introduction passage 22 for the air A containing paint mist is formed along the upper end part of the guide surface 5. Namely, the peripheral length of the guide surface 5 is long, so the size of the paint mist particles to be captured is reduced as compared to the prior processes. Thus, smaller particles are separated with the same separation efficiency, and the separation efficiency is increased if the particle size to be separated is same.

Description

[Detailed Description of the Invention] This book! jl is applied to the paint mist-containing air purification device in the paint booth.

The spray type 1 Rinsou Goose KsP may overspray and cause the paint mist to get into the air and adhere to the booth, especially if it worsens the working environment.
ial, I! In order to do so, the following measures are taken.

ψ Form #l permeating air suction St- on the ceiling side of the booth.

■ The floor is a grating floor, and a 10-meter (exhaust blennium) is used that sucks in the mist air from below and discharges the clean air after the paint mist into the atmosphere.
tRffru.

■ l1rJk! , above the blower [111 and below the grating 70A, including the mist? ! 9 by giving contact name to Xt purification water! The mist in the air is collected in the water for purification, and the air is purified.

(2) The water collected in the sludge mist (sludge) is introduced into a separation tank, clarified, and then circulated using a pump.

Contains paint mist mentioned above! I! Conventionally, the target method shown in Figure 1, the target method shown in Figure 2, and the
The direction change method shown in FIG. 8 or a hybrid method as shown in FIGS. 8 and 48 are known. In these figures, the prisoner contains mist (air,
The surface is water for purification, (1) is target play), and tll is quality.

Each of these types has its advantages and disadvantages, but the problem with all of them is that the ratio of lI1wJ for paint mist is insufficient, and mI mist with an undesirably small particle size (/σ micron or more)
This is the point where the separation is incomplete.

The present invention aims to improve this problem.

Let's consider the model in Figure 6 in which inertial separation is the main force and Stokes' resistance law is applied to it.
In this diagram (RI is the inner surface of the dormitory concave area containing purification water and 111 mist, I41 is its entrance, and n is IIf inside the dormitory.
The center of curvature of tll, 1116 is the effective central angle, @ is the entrance 1
4) width (effective diameter obtained by subtracting A of the shaft from the radius of curvature of the guide surface ts+, (V) is the airflow velocity at the inlet (41).

If we ignore the deceleration of the airflow as a -order approximation and let R) b, then the change in direction (direction change) K over the central angle ■ radians
Therefore, 11nv! + The distance that the mist particles move outward in half four directions due to centrifugal force (si x td) is d: , g particle diameter [bait] rp: 'ML particle once Cu/Wt] -! ! jlL writing degree [hours/sr/) ν: -viscosity retention Cd/-) of air
Particles with d<dc are cut into the airflow.

In other words, particles with small diameters are difficult to capture.

Therefore, in order to reduce the trapping radius -dc, the above formula (I
)Than,·! j (a) Increase the size of commercials. In other words, increase the same length (L).

(b) Reduce X(d), that is, b.

The paint mist-containing empty 51L purification unit of the paint booth according to the present invention has a series of arc-shaped or similar shapes arranged below the purifying water flow 'F wall and with a vertical line in the middle m part in the upper F direction. The inner surface of the recessed dormitory for purifying water and the #1 material mist-containing air has a surface or a surface close to it, and the tangent at the upper end ν and the tangent at one end are in the horizontal direction or in a direction gently inclined to the horizontal direction, and A shape sVc is formed along the upper end portion of the air passage tgqg guiding direction of the paint mist-containing air.

I will briefly explain what the dormitory inward movement described here is with reference to FIG. 6. In both cases, the top starting point is (PL
) as well as (P,) and (Pρ but also $kot, also,
It shows that the final 7 points of Fjll can be not only (ω but also (electric) or (electric). It also shows that there are JXJ-ta combinations of both points.・(Pi).

(QL) is the center of curvature of a perfect circle (directly above and below O,
(Pρ, (~-(QL)), (Electric indicates that the tangent there is 10 degrees or less with respect to the horizontal, preferably JOpi or more F, and preferably rj/Jle or less.

Guide direction I11 is in relation to the perfect circle (to), as shown in the VGA diagram)
(Rumor has it that the upper half is bulging, and one and a half rir are bulging)
Both the upper half and f half are bulged, and (E) is large &! 11! The case of polygonal lines in line groups is shown in detail. In addition, the prayer method is tal or e.
This also applies to Uyani). In principle, the 41i degree of the bulge, the center of curvature, and the radius should not be about -J, but it is thought that the smaller the bulge, the better. In addition, 1111 is a water flow for purification.

As can be understood from the above examples, in the present invention, li! l! kt - Since it has been taken for a sufficiently long time, the theoretical vc becomes slightly smaller δ compared to the capture of #1 mist particles tMm field diameter dcf as guaranteed by formula (I). be able to. In other words, by simply improving the Jk structure of the guide surface, it is possible to separate smaller particles with the same separation efficiency by 1 compared to the conventional structure, and it is possible to increase the Jli efficiency with the same particle size. In addition, in addition to countermeasure (a), there is no problem in using countermeasures (cut and e) together in the end of the final stage. explain.

[11! ig1 example. Figures 7 and 8.

173 I/'i paint booth, 18) is the wall, (8) is the gray ring 70a, (1α is the wavy line equipment such as the eye spinning wheel body, -kawa is the trolley, d is the purification water supply header, lIs
041 and 451 are a series of long partition plates, and the outer surface of partition plate 4 also serves as the flow wall (6). - is a diagonal bottom plate, 1 is a drain groove, and 1181 is a duct leading to the exhaust plenum. The broken line represents the flow of air (Al represents the flow of air, and the solid line represents the flow of water.

The dots are paint mist particles. Jl is a series of long gutter-shaped guide plates in the shape of a perfect circular arc spanning 110 degrees, and the inward direction of the seventh sign is m + s + inside the dormitory. The fourth one is the target plate. 1) is a guide plate for forming a passage through which the paint mist-containing space X is introduced along the first part of the inner surface of the dormitory (-). Purification water also overflows onto the information board @Uljo.

The flow wall I drawer and the introduction port W&(5) have a common opening (2) to the coating booth 171. In this example 2
It is always easy to clean the sludge adhering to the companion guide lll1ti+, in which the two guide plates 11 and l@- are arranged back to back, through the seven large /ram openings. Note that it is desirable to coat the guide tf[i 1B+ with a substance, such as thean, that prevents the adhesion of #1 material particles.

RuO [[1]j18 cases. No. sad.

In this Fi, the two guide plates Ill and ta are placed face-to-face, and the target plate m is shared.A central supply Heragu cap is installed between the air guide plates mu and me, and the round plate is Purification water overflows from the top opening.

(a 8th example. Figure 10.

There are seven ri openings (2), and there are also seven next circular plates and seven target plates.

Emperor 4th example. Figure 11.

This is because the flow'F wall +61 and the introduction passage (2) are separate, and the painting booth (7) is connected through the openings ($!8') and the UI edge.
Indicates that the person is present.

[Brief explanation of drawings]

@ Figures 1 to 4 are all # side views of the conventional example, Figure 6 is a model diagram explaining inertial separation, and Figures 6 (A) to 6 (E) are cross-sectional views showing various examples of the inner surface of the recessed dormitory. , FIGS. 7 to 11 show the first embodiment of the present invention, FIG. 1167 is a vertical sectional view of almost the whole, and FIGS. 8 to 11 are longitudinal sectional views of main parts of the different embodiments. . (61... Concave dormitory inner surface, +S+----; - flowing wall, solid... introduction passage. Agent゛ Patent Attorney T Village Eras No. 61i! Il Figure 9

Claims (1)

[Claims] ■ Flowing water for purification! ! ! A series of arc-shaped or similar shapes connected to 1111 and below 7, with a vertical direction or a l1ii close to it in the vertical middle part, and tangents at the upper and lower ends are horizontal or gently inclined with respect to the horizontal direction. The recessed inner surface of the dormitory is shaped like a concave inner surface of the air containing purifying water and elm mist, and an artificial channel (2) for guiding air containing paint mist is formed along the #starting surface (secondary upper end portion). A paint mist-containing air purification device for a III-equipped booth. ■ The guide surface (-) has a central angle of 110 degrees or approximately 110 degrees.
111% mist-containing air purification device for a painting booth as described in item 0 of the special Ifm requirement range, which has a perfect circular arc shape. ■ #ε flowing down! ! Patent claim m1 No.
I! Air purification device containing paint mist from I-Min Goose. (4) 藺ε introduction imaginary path - flow of water for purification upwards at the bottom of the seventh m
The paint mist-containing air purification device for the paint booth described in item ① of Tokuem JK, which is a product of Kl&Neru.