JPH08323255A - Apparatus for purifying coating booth - Google Patents

Abstract

PURPOSE: To prevent the putrefaction and offensive odor generation of washing water by installing the first washing water circulating apparatus which takes out washing water in a water tank and makes the water flow downward along a water flow plate and the second washing water circulating apparatus in which, after paint mist reacted with ozone being collected by a filter, washing water is ejected from a showering apparatus. CONSTITUTION: In the purification of a coating booth, the circulating pump 21 of the first washing water circulating apparatus is operated, washing water 13 in a water tank 5 is led above a water flow plate 3 through a discharge piping 27, the water 13 is ejected toward the water flow plate 3 and scattered to catch paint mist. In this operation, in the mixer 29 of the second washing water circulating apparatus, the washing water 13 is reacted with ozone generated by an oxygen concentrating device 35 and an ozonizer 37 and, after the deodorization and the viscosity lowering of the paint mist, is introduced to a filter to catch the paint mist. The purified washing water 13 is ejected downward from a showering apparatus 45 so that the paint mist contained in air sucked into a dust collector 1 is caught and dropped.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coating booth purifying apparatus, and in particular, it uses ozone to reduce the viscosity of the coating material scattered during coating and facilitates sludge recovery, for maintenance and inspection of the coating booth. This product reduces the time and effort required, and circulates and showers ozone water to prevent spoilage of the cleaning water and prevent the generation of offensive odors, thereby improving the environment of the painting work site. .

[0002]

2. Description of the Related Art Conventional coating work using a coating booth is performed by the following method. First, there is a coating booth, and the object to be coated is carried into and suspended from the coating booth. In that state, a paint gun is used to spray paint onto the object to be painted. At that time, in the coating booth, there was a water plate behind the object to be coated,
The wash water is flowing down in a waterfall shape on the water plate. Then, the paint that was sprayed from the coating gun and was not applied to the object to be coated collided with the above-mentioned water flow plate, flowed down with the washing water flowing down there, and was installed at the bottom of the coating booth. It is housed in the booth. The cleaning water in the pool is sucked and discharged by the pump and again flows down from the water flow plate.

Further, a dust collector is installed in the coating booth and behind the water flow plate, and the dust collector sucks air containing the paint mist scattered in the coating booth. After collecting the paint mist, only clean air is exhausted outside the paint booth.

[0004]

The above-mentioned conventional structure has the following problems. First, the paint mist that scatters in the coating booth has a high viscosity, and for example, if you try to collect it together with pool water and try to circulate it, it will adhere and accumulate on the inner surface of the pump and piping group. There has been a problem that the circulation function of the wash water is impaired. In addition, when such a situation occurs, the pump and piping group will be maintained and inspected, but it is difficult to perform maintenance and inspection work because the viscosity of the paint mist that has adhered and accumulated is high. As a result, the operating rate of the coating device will decrease. Further, when the cleaning water is used in a state where the coating mist is mixed, the cleaning water may be rotted due to the influence of the coating mist, which causes a problem that the cleaning effect is deteriorated. . Further, the scattered paint mist is naturally accompanied by paint odor, and such a paint odor could not be eliminated by the conventional device. Further, in the conventional case, an acid or alkali coagulant was poured into pool water to coagulate / precipitate the coating mist for treatment, but at that time, a large amount of coagulant was required. However, there was a problem that the work was complicated.

The present invention has been made on the basis of the above points, and an object thereof is to use ozone to reduce the viscosity of the coating material scattered at the time of coating, thereby facilitating the recovery of sludge, and By reducing the time and labor required for maintenance and inspection work, and by circulating and showering ozone water, we are trying to prevent spoilage of wash water and the generation of offensive odors.
The purpose of the invention is to provide a paint booth purification device that can improve the environment of the painting work site.

[0006]

In order to achieve the above object, a paint booth purifying apparatus according to the present invention is provided with a water tank for containing wash water which is provided at the bottom of a paint booth and which contains a floating paint mist. And a first wash water circulating device for taking out the wash water from the water tank and flowing down along the water flow plate from above the water flow plate provided in the coating booth, and a paint mist near the liquid surface in the water tank. After the cleaning water is taken out and introduced into the mixing device, the ozone generated separately is introduced into the above mixing device to bring the cleaning water containing the paint mist into contact with the ozone, and then the paint mist is collected by the filter. A second cleaning water circulating device for spraying the purified cleaning water through a shower device arranged in the coating booth.
At that time, in the second cleaning water purifying apparatus, it is considered to arrange a centrifugal separator in front of the mixing apparatus and introduce the cleaning water containing the paint mist into the mixing apparatus after passing through the centrifugal separator. To be Further, the water tank has a two-stage structure, and the cleaning water flowing down along the water flow plate of the first cleaning water circulation device and the cleaning water sprayed from the shower device of the second cleaning water circulation device are
It is conceivable to make it flow down into the water tank, overflow the partition plate from there, and flow out into the second water tank. Further, it is conceivable to install a dust collecting device in the coating booth and behind the water flow plate. Further, it is conceivable to provide a jet device behind the water tank and near the liquid surface.

[0007]

That is, in the case of the present invention, the second cleaning water circulating device brings the cleaning water containing the paint mist into contact with ozone, thereby deodorizing and decreasing the viscosity of the paint mist, and at the same time, in the coating booth. The cleaning water used in 1. is ozone water, whereby the cleaning effect by the first cleaning water circulating device and the second cleaning water circulating device is enhanced.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIGS. As shown in FIGS. 1 to 3, first, there is a coating booth 1. The coating booth 1 is made of, for example, a steel plate, and has a configuration in which the front side (side for performing the coating work) is opened as an opening 1a. Has become. A water flow board 3 is installed in the coating booth 1 at a position slightly rearward of the intermediate position in the front-rear direction (shown in FIG. 3). The bottom of the coating booth 1 is a water tank 5 or a water tank 7. The water tank 5 and the water tank 7 are partitioned by a partition wall 9, and the partition wall 9 has a notch 1 as shown in FIG.
1 is formed, and the cleaning water 13 in the water tank 5 is configured to overflow to the water tank 7 side via the notch 11.

As shown in FIG. 3, a dust collector 13 is installed behind the water flow plate 3 in the coating booth 1. This dust collecting device 13 includes an exhaust fan 17 attached to an opening 15 in the ceiling wall of the coating booth 1, and a water flow board 3.
It is composed of a plurality of (three in this embodiment) emily meters 19 installed in multiple stages in the space behind.
The exhaust fan 17 includes a drive motor 17a and a fan 1
7b and. Then, by operating the exhaust fan 17, the air containing the paint mist scattered in the paint booth 1 is sucked, and the paint mist in the air is collected by the emily meter 19. Then, the clean air is exhausted to the outside.

As shown in FIG. 1, a circulation pump 21 is installed outside the coating booth 1, and the suction side of this circulation pump 21 is connected to a discharge port 23 provided at the lower lateral portion of the water tank 5. , Are connected via the suction pipe 25. The discharge side of the circulation pump 21 is connected to the upper side of the water flow plate 3 via a discharge pipe 27. By operating the circulation pump 21, the cleaning water 13 accumulated in the water tank 5 is sucked and pressurized, and is guided to above the water flow plate 3 through the discharge pipe 27. The introduced cleaning water 13 flows down on the front side of the water flow plate 3. At that time, the paint mist is jetted toward the water flow plate 3 and scattered to collect the paint mist, and the paint mist flows down into the water tank 5 in a state of containing the paint mist. The above configuration corresponds to the first wash water circulation device.

Further, as shown in FIG. 1, a mixing device (referred to as a turbo mixer) 29 is installed outside the coating booth 1. On the liquid inflow side of this mixing device 29,
A liquid inflow pipe 31 is connected, and this liquid inflow pipe 31 is connected to a discharge port 33 provided on the side portion of the water tank 7. That is, a large amount of the paint mist collected is floating on the liquid surface in the water tank 7, and the wash water containing the paint mist is mixed through the liquid inflow pipe 31 with the mixing device 2
Installed within 9

On the other hand, an oxygen concentrator (hereinafter referred to as PSA)
35 and an ozonizer 37 are installed, and gaseous ozone (O ₃ ) generated there is ozone inflow pipe 39.
Is introduced into the gas inflow side of the mixing device 29 through the. The PSA 35 concentrates the oxygen concentration in the air to 90% or more and supplies it to the ozonizer 37. The ozonizer 37 converts concentrated oxygen into ozone. The ozonizer 37 is provided with an unillustrated ozonizer cooling pump to cool the ozonizer electrode. Then, in the mixing device 29, the cleaning water 13 containing the paint mist contacts and reacts with ozone to deodorize and reduce the viscosity of the paint mist. Further, the cleaning water 13 that has passed through the mixing device 29 is introduced into the filter 41, where the paint mist is collected and removed. Then, the cleaned cleaning water 13 is passed through the pipe 43,
It is supplied to the shower device 45. The shower device 45
As shown in FIG. 3, the cleaning water 13 is disposed in the lower rear part of the water flow plate 3, and sprays the cleaning water 13 downward through a large number of ejection holes 45a. Thereby, the paint mist contained in the air sucked into the dust collector 13 is collected and dropped.
The above configuration corresponds to the second cleaning water circulation device.

Further, as shown in FIGS. 2 and 3, a jet device 47 is provided behind the water tank 5 and near the liquid surface. The jet device 47 has a plurality of jet holes 47a, and jets the wash water 13 near the liquid surface of the water tank 5 through the jet holes 47a. Thereby, the paint mist floating on the liquid surface of the water tank 5 is forcibly discharged to the water tank 5 side. Reference numeral 51 in FIG. 3 is an object to be coated, and the object 51 to be coated is spray-coated with a coating gun 53. Further, another discharge pipe 28 is connected to the discharge side of the pump 21, and is branched and connected to the pipe 43. That is, the wash water 1 from the pump 21
3 is also supplied to the shower device 45.

Next, the structure of the mixing device 29 will be described. First, there is a housing 61, which is composed of a casing 63, a gland cover 65, a bracket 67, etc., and the opening side (right side in FIG. 4) of the casing 63 is closed by a flange 69. The opening on the left side of the bracket 67 in FIG. 4 is closed by a bearing pressing member 71. The casing 63 is
The shape is as shown in FIGS. 22 and 23, and a water supply port 73 is bored at a predetermined position of the cylindrical portion. As shown in FIG. 5, an ejector 75 is attached to the water supply port 73. The pipe 31 already described is connected to the ejector 75, and the pipe 3
9 is connected. Then, the cleaning water 13 is sucked through the pipe 31, and at that time, ozone is sucked through the pipe 39 by the negative pressure generated in the ejector 75.

The ground cover 65 is shown in FIGS.
It has a shape as shown in FIG. Also, the bracket 67
Has a shape as shown in FIGS. 26 and 27.
Further, the flange 69 has a shape as shown in FIGS. 9 and 10. The flange 69 is provided with an outflow port 77 for discharging the wash water 13 containing ozone, and the outflow port 77 is connected to the filter 41 side already described. Also, the bearing holding member 7
1 has a shape as shown in FIGS. 28 and 29.

A shaft 81 is housed / arranged inside the housing 57 having the above structure, and one end (the left end in FIG. 3) of the shaft 81 is connected to an output shaft 83a of a drive motor 83 through a coupling (not shown). Are linked together. The shaft 81 is rotatably supported by bearings 85 and 87 arranged on the inner peripheral side of the bracket 67. Further, a mechanical seal 89 and the like are attached to the outer peripheral side of the shaft 81.

Further, at a position between the mechanical seal 89 and the flange 69 of the shaft 81, the impeller 91 and the turbo suction 9 are arranged from the mechanical seal 89 side.
3, a turbo runner 95, and a turbo vane 97 are attached in relation to each other. Further, the other constituent members except the turbo vane 97 are fixed to the shaft 81 by screwing the bolt 101 into the shaft 81 via the washer 99. The bolt 101 has a shape as shown in FIGS. 6 and 7, and the washer 103 is
The shape is as shown in FIG. Also, the shaft 81
Has a shape as shown in FIG.

The impeller 91 has a shape as shown in FIGS. 19 and 20. First, there is a boss portion 105, and a disk 107 is provided around the boss portion 105. The boss portion 105 has a hole 109 through which the shaft 81 passes.
And a keyway 111 is formed in this hole 109. A plurality of (24 in this embodiment) recesses 113 are formed on the outer peripheral portion of the disc 107. As shown in FIG. 18, the recess 113 is formed so as to be cut out in an arc shape toward the outer side in the radial direction. The plurality of recesses 113 form an impeller structure including a plurality of blades.

The turbo suction 93 has a shape as shown in FIGS. First, the cylindrical portion 11
3, a cylindrical bottom 113 is continuous with an annular bottom 115, and a boss 117 is further provided. An opening 119 is formed on the inner peripheral side of the boss 117. Further, as shown in FIG. 16, the cylindrical portion 113 and the annular bottom portion 115 are
A plurality of (121 in this embodiment) recesses 121 extending in the radial direction are formed. In addition to the recess 121, only one notch 123 is formed. A baffle piece 125 is attached to the cutout 123.

The baffle piece 125 has a shape as shown in FIGS. That is,
A plate body 127 in which a part of the ring-shaped member is cut off, and an upright portion 129 that stands upright in the axial direction from the outer periphery of the plate body 127.
It consists of and. Then, the baffle piece 125 having the above configuration is attached in a state as shown in FIGS. 15 and 16, and the upright portion 129 is, as shown in FIG.
The outer peripheral portion of the impeller 91 is engaged.
Further, as shown in FIG. 16, the baffle piece 125 partially closes the notch 123. Then, the impeller 91 and the baffle piece 12
5 acts to crush bubble-like ozone. That is, the gas-liquid mixed fluid (cleaning water 13 and ozone) that has flowed into the casing 63 expands there. Bubbles are expanded by this expansion, and the expanded bubbles are crushed by the relative rotational movement with the gap between the impeller 91 and the baffle piece 125.

The turbo runner 95 is shown in FIGS.
It has a shape as shown in FIG. This turbo runner 9
5 includes a boss portion 131 and a disk portion 133, and a hole 135 through which the shaft 81 passes is formed in the boss portion 131. A key groove 137 is formed in this hole 135. Further, a plurality of (12 in the case of this embodiment) notches 139 are formed on the outer peripheral portion of the disc portion 133. As shown in FIG. 14, the notch 139 is formed in an inclined state. Also, the turbo runner 95, the turbo suction 93, and the baffle piece 125
The relationship with is as shown by the phantom line in FIG.
Then, the turbo suction 93 and the turbo runner 95 are provided.
By the relative rotational movement between and, bubble-like ozone is further crushed.

Next, the structure of the turbo vane 97 will be described. The turbo vane 97 has a shape as shown in FIGS. 11 and 12. The turbo vane 97 has a cylindrical portion 14
1 and an annular bottom portion 143, and an opening portion 145 is formed in the annular bottom portion 143. A plurality of (eight in this embodiment) notches 147 are formed in the annular bottom 143 at equal intervals in the circumferential direction. The plurality of notches 147 form a vane structure. Then, the turbo vane 97 having such a configuration finally pressurizes and discharges the gas-liquid mixed cleaning water 13. A pressure chamber 98 is provided between the turbo vane 97 and the flange 69, and the pressurized gas / liquid mixed fluid is pressurized here and bubbles are crushed in the ozone cleaning water 13. Is dissolved in the water.

According to the mixing device 29 having the above structure, first, when the drive motor 83 is started and rotated, the shaft 81 rotates in the same direction, whereby the impeller 91 and the turbo runner 95 fixed to the shaft 81. Rotates. Then, the cleaning water 13 is sucked through the pipe 31 and the ejector 75. This cleaning water 13 is ejector 75
A negative pressure is generated when passing through, and ozone is sucked through the pipe 39 by the ejector action using the negative pressure. Then, the gas / liquid mixed fluid of the cleaning water 13 and ozone is transferred to the casing 5 via the inflow port 73 of the casing 57.
Inflow into 7. The gas-liquid mixed fluid is decompressed and expanded when it flows into the casing 57, and the expansion also expands the ozone bubbles.

An impeller 91 is arranged inside the inflow port 73 of the casing 57, and the wash water 13 and ozone that have flowed into the casing 57 are provided in a plurality of recesses 1 of the impeller 91.
Suction and pressure are applied via 13. At the same time, the baffle piece 125 is arranged at the outer peripheral position of the impeller 91, and the inner peripheral surface of the standing portion 129 of the baffle piece 125 and the outer peripheral surface of the impeller 91 are arranged with a slight gap. ing. The rotation of the impeller 91 causes the outer peripheral surface of the impeller 91 and the inner peripheral surface of the standing portion 129 of the baffle piece 125 to “cut off” the suctioned cleaning water 13 and ozone. Crushes ozone contained in bubbles (acts like breaking bubbles). The crushed ozone will be dissolved in the cleaning water 13.

Then, the cleaning water 13 in which the bubble-like ozone is crushed is sucked toward the turbo suction 93 side through the notch 123 of the turbo suction 93. The cleaning water 13 sucked into the turbo suction 93 is further caused by the action of the plurality of recesses 121 of the turbo suction 93 and the plurality of cutouts 139 of the turbo runner 95 opposed to the turbo suction 93, and bubbles of ozone thereof. Will be crushed.

Washing water 13 in which ozone bubbles are crushed by the turbo suction 93 and the turbo runner 95.
Is discharged to the turbo vane 97 side, and turbo vane 97
The pressure is applied by the pressure action in the pressure chamber 98. At the same time, the pressurization promotes the dissolution of ozone whose air bubbles have been crushed in the cleaning water 13. The cleaning water 13 pressurized by the turbo vane 97 is discharged into the pressurizing chamber 98 between the turbo vane 97 and the flange 69, and is discharged to the filter 41 side as ozone water through the outflow port 77 of the flange 69.

According to this embodiment, the following actions and effects can be obtained. First, in the second cleaning water circulation device, the cleaning device 13 is brought into contact with and reacts with ozone by the mixing device 29, so that the viscosity of the coating mist contained in the cleaning water 13 is significantly increased. It can be reduced and deodorized. Then, the coating mist is collected by the filter 41, and the purified cleaning water 13 is showered by the shower device 45. At that time, since the cleaning water 13 is ozone water, even during the showering, the viscosity of the coating mist (the floating coating mist and the coating mist retained on the liquid surface of the water tank 5) is reduced and the odor is removed. It can exert its function. In addition, the mixing device 2 according to the present embodiment
9, ozone can be dissolved in the wash water 13 with extremely high efficiency, and according to the experiment, it is 5 to 10 ppm.
It can be made up of ozone water. Therefore, the self-floating function / effect is provided with extremely high efficiency. In addition, the generation of bacteria can be suppressed to prevent the washing water 13 from spoiling, and the coagulant, which has been conventionally required, can be eliminated. Further, since the cleaning water 13 in the water tanks 5 and 7 is also turned into ozone water by the second cleaning water circulation device, the same function can be obtained even when the cleaning water 13 flows down using the water flow plate 3 by the first cleaning water circulation device. Can be demonstrated. That is, since the cleaning water 13 itself used in the coating booth 1 becomes ozone water, when it flows down through the water flow plate 3, when showered by the shower device 45, and when the water run 5
The ozone effect can be repelled at all timings, such as when flowing from the water tank 7 side to the water tank 7, and the deodorizing effect, the viscosity reduction of the paint mist, and the spoilage preventing function of the cleaning water 13 described above are exhibited. . Due to the above actions and effects, not only the coating booth 1 but also each device
It is possible to prevent the coating mist from adsorbing and accumulating, thereby eliminating the need for complicated maintenance and inspection work and improving the operation rate of the coating apparatus. Further, since the water tanks 5 and 7 are provided in two stages and overflowed, the coating mist floating on the liquid surface can be effectively collected on the water tank 7 side, and the subsequent processing efficiency is improved. Also, the jet device 4
7 also exhibits the same effect, and the coating mist floating on the liquid surface of the water tank 5 is efficiently moved to the water tank 7 side to make the above-mentioned action more reliable. Moreover, since the dust collector 13 is also installed, the purification effect is extremely high.
Further, ozone is dissolved in the cleaning water 13 by the mixing device 29. At this time, although some ozone is not dissolved, the ozone which is not dissolved is passed through the liquid surface of the water tank 5 and the water tank 7. And flows into the atmosphere in the coating booth 1. And
The gaseous ozone that has flowed out decomposes the paint mist floating in the atmosphere in the coating booth 1, whereby the air exhausted to the outside through the dust collector 13 becomes extremely clean.

Next, a second embodiment of the present invention will be described with reference to FIGS. In this embodiment, a mixing device 29 of a type different from that of the first embodiment is used. The same parts as those of the first embodiment are designated by the same reference numerals and the description thereof will be omitted. First, at a position between the mechanical seal 89 and the flange 69 of the shaft 81, from the mechanical seal 89 side, the mixing vane 151, the turbo vane 153, the turbo runner 15 are arranged.
5, baffle piece 157, bower sleeve 159, stage partition plate 161, impeller 163, baffle piece 165, bower sleeve 167, and reaction chamber 169 are arranged in relation to each other.

First, the structure of the mixing vane 151 will be described. The mixing vane 151 is shown in FIGS.
As shown in FIG. 2, it is formed in a disc shape, and a hole 171 through which the shaft 81 is searched is formed in the center portion, and a key groove 173 is formed continuously with the hole 171. The mixing vane 151 is fixed to the shaft 81 by the hole 171 and the key groove 173. Further, a plurality of (12 in the case of this embodiment) notches 175 are formed on the outer peripheral portion of the mixing vane 151 at equal intervals in the circumferential direction. These notches 175 are formed in an inclined state.

Next, the structure of the turbo vane 153 will be described. This turbo vane 153 is shown in FIG. 33 and FIG.
As shown in FIG. 4, it is formed in an annular shape and has a hole 1 on the inner peripheral side.
Equipped with 77. The turbo runner 155 is installed in this hole 177.
The boss portion of will be fitted. A plurality of (12 in this embodiment) notches 179 are formed in the hole 177. These notches 179 are also formed in an inclined state.

Next, the structure of the turbo runner 155 will be described with reference to FIGS. 35 and 36. First, the boss portion 181
The disc portion 183 is formed continuously with the boss portion 181. At the center of the boss portion 181 and the disc portion 183, a hole 185 through which the shaft 81 communicates is formed, and a key groove 187 is formed continuously with the hole 185. The turbo runner 155 has these holes 18
It will be fixed to the shaft 81 by the 5 and the key groove 187. Further, the boss portion 181 will be fitted into the hole 177 of the turbo vane 153 already described.
A plurality of (12 in this embodiment) notches 189 are formed on the outer peripheral portion of the disc portion 183.

Next, the baffle piece 157 has substantially the same shape as the baffle piece in the first embodiment, and has the structure shown in FIGS. 37 and 38. That is, it is composed of a plate body 191 in which a part of the ring-shaped member is cut out, and an upright portion 193 provided upright in the axial direction from the outer peripheral portion of the plate body 191.
The plate body 191 has a hole 19 through which a fixing screw passes.
5 is perforated. The baffle piece 165 has the same structure as the baffle piece 157.

Next, the structure of the bow sleeve 159 will be described. As shown in FIGS. 39 and 40, the bower sleeve 159 has a cylindrical shape and is arranged in a state of supporting the baffle piece 157 already described from the outer peripheral side. The bow sleeve 167 also has the same structure as the bow sleeve 159. However, in the case of this bow sleeve 167, pin holes 19 are provided on both sides of the cylindrical portion.
7, 199 are perforated and these pin holes 197, 1
Pins 201 and 203 are inserted into 99. That is, it is for positioning the circumferential position of the stage partition plate 161 and the reaction chamber 169 at predetermined positions. It will be described in detail later.

Next, the structure of the stage partition plate 161 will be described. This stage partition plate 161 is shown in FIGS.
It has a shape as shown in. First, there is a boss portion 205, and a disc portion 207 is continuously formed on the boss portion 205. A screw hole 209 is formed in the disc portion 207. The fixing screw for fixing the baffle piece 157 described above is screwed into the screw hole 209. That is, the baffle piece 157
Is fixed to the stage partition plate 161 by a fixing screw.
Will be fixed to the side. Further, a hole 211 is bored in the outer peripheral portion of the disc portion 207, and the other end side of the pin 201 (one end side thereof is the bow sleeve 1
(Inserted in holes 197 of 59). A notch 213 is formed on the outer peripheral portion of the disc portion 207. The baffle piece 157 has the cutout portion 21.
3 will be attached in a state of partially closing. Then, the hole 211, the hole 199 of the bow sleeve 167 already described, and the pin 203 inserted thereinto position the stage partition plate 161 in the circumferential direction so that the notch 213 is located just below in FIG. To position.

Next, the structure of the impeller 163 will be described. The impeller 163 has a shape as shown in FIGS. 43 and 44. The impeller 163 is first provided with a boss portion 215, and a disc 217 is continuously formed on the boss portion 215. A hole 219 for allowing the shaft 81 to penetrate is formed in the center of the boss portion 215, and the key groove 22 is continuous with the hole 219.
1 is formed. The impeller 163 has these holes 21.
It will be fixed to the shaft 81 through 9 and the key groove 221. Further, a plurality of (24 in this embodiment) recesses 223 are formed on the outer peripheral portion of the disc portion 217.
These recesses 223 are extended and formed in the radial direction,
It is formed in an arc shape.

Next, the structure of the reaction chamber 169 will be described. This reaction chamber 169 is shown in FIG.
5 and the shape shown in FIG. 46. First, there is a boss portion 225, and the boss portion 225 has a disc portion 227.
Are formed continuously, and the cylindrical portion 2 is further formed.
29 are continuously formed. The boss portion 225 is
It will be fitted to the outer peripheral side of the boss portion 215 of the impeller 163 described above. Further, the disk portion 227 has a screw hole 23.
1 is perforated, and a fixing screw for fixing the baffle piece 165 is screwed into the screw hole 231. Further, the pin hole 23 is provided on the outer peripheral portion of the disc portion 227.
3 is perforated. One side of the pin 201 inserted into the bore sleeve 167 side is inserted into the pin hole 233. By this, the circumferential position of the reaction chamber 169 is determined, and the position of the baffle piece 165 attached to the reaction chamber 169 is positioned downward in FIG. In FIG. 30, reference numeral 225 indicates a decompression chamber and reference numeral 227 indicates a pressurization chamber.

According to the mixing device 29 having the above-described structure, first, when the drive motor 83 is started and rotated, the shaft 81 rotates in the same direction, whereby the mixing vane 151 and the turbo runner fixed to the shaft 81. 155 and the impeller 163 rotate. And the pipe 31
Also, the cleaning water 13 is sucked through the ejector 75. A negative pressure is generated when the cleaning water 13 passes through the ejector 75, and the pipe 39 is operated by the ejector action using the negative pressure.
Ozone is sucked in through. Then, the gas-liquid mixed fluid of the cleaning water 13 and ozone flows into the decompression chamber 225 inside the casing 57 through the inflow port 73 of the casing 57. The gas / liquid mixed fluid of the cleaning water 13 and ozone that has flowed into the decompression chamber 225 is decompressed, and the bubbles of ozone expand.

The gas-liquid mixed fluid containing the expanded ozone bubbles is mixed with the mixing vane 151 and the turbo vane 15.
3, it is sucked to the turbo runner 155 side, at that time,
By the action of the mixing vane 151, the turbo vane 153, and the turbo runner 155, the expanded ozone bubbles are crushed. That is, mixing vane 1
51, the turbo vane 153, and the turbo runner 155 are rotated relative to each other, the respective notches 175, 179, 189.
It acts to "cut" the expanded ozone bubbles, thereby crushing the expanded ozone bubbles. At this stage, the dissolution of ozone in the cleaning water 13 is promoted. Next, turbo runner 15
The gas-liquid mixed fluid flowing out to the secondary side of No. 5 is pressurized by the action of the baffle piece 157 attached to the stage partition plate 161. The pressurized gas-liquid mixed fluid is sucked by the impeller 163, further pressurized together with the pressurizing action of the baffle piece 165 arranged on the secondary side, and flows out into the pressurizing chamber 227. .

In the gas-liquid mixed fluid flowing out into the pressurizing chamber 227, the ozone cleaning water 13 remaining in the form of bubbles
It will be further dissolved in. Then, the ozone water is discharged to the filter 41 side via the outflow port 77 of the flange 69. Note that in Figure 30
The flow path of the liquid mixed fluid is indicated by an arrow. In the case of this embodiment, the cleaning water 13 for ozone is more than that in the case of the first embodiment.
The dissolution rate can be increased. This is because, by providing the decompression chamber 225, the introduced gas / liquid mixed fluid is positively decompressed / expanded, and bubble ozone is effectively expanded. Further, the expanded ozone bubbles are crushed by the respective notches 175, 179, 189 by the relative rotation of the mixing vane 151, the turbo vane 153, and the turbo runner 155, so that it can be crushed more efficiently. Because you can. In addition, the provision of the two baffle pieces 157 and 167 also greatly contributes to the effect of crushing air bubbles, which accelerates pressurization.
This is because the ozone crushing / dissolving efficiency in the pressurizing chamber 227 is enhanced.

Next, a third embodiment of the present invention will be described with reference to FIG. In the case of this embodiment, the centrifugal separator 3 is placed in front of the mixing device 29 shown in the first and second embodiments.
01, and wash water 13 containing paint mist first,
It is introduced into the centrifugal separator 301, where the coating mist is removed, and in that state, it is sent out to the mixing device 29. Further, the filter is eliminated.
Even with such a configuration, the same effect or more can be obtained.

[0041]

As described in detail above, according to the coating booth purifying apparatus of the present invention, first, in the second cleaning water circulating apparatus, the cleaning water and ozone are brought into contact and react with each other by the mixing apparatus. As a result, the viscosity of the coating mist contained in the wash water can be significantly reduced and deodorization can be performed. Then, the coating mist is collected by the filter, and the purified cleaning water is showered by the shower device. At this time, since the cleaning water is ozone water, the mist deterioration of the coating mist and the deodorizing function can be exhibited even during the showering. Further, since the cleaning water in the water tank is also turned into ozone water by the second cleaning water circulation device, the same function can be exerted even when the cleaning water is flowing down using the water flow plate by the first cleaning water circulation device. . Due to the above-mentioned actions and effects, the coating mist is not adsorbed and accumulated not only in the coating booth but also in each device, thereby eliminating the need for complicated maintenance and inspection work and improving the operation rate of the coating device. Can be improved. Further, when the water tank is provided in two stages and overflows, the coating mist floating on the liquid surface of the first water tank can be effectively collected on the second water tank side, and the subsequent treatment efficiency is high. Become. Further, the jet device also exhibits the same effect, and efficiently moves the coating mist floating on the liquid surface of the water tank to further ensure the above-mentioned operation. Further, when a dust collector is also installed, the purification effect becomes extremely high.

[Brief description of drawings]

FIG. 1 is a diagram showing a first embodiment of the present invention and is a configuration diagram showing a configuration of a coating booth purification device.

FIG. 2 is a diagram showing a first embodiment of the present invention and is a configuration diagram showing a configuration of a coating booth in a coating booth purification device.

FIG. 3 is a sectional view showing a configuration of a coating booth in the coating booth purifying apparatus according to the first embodiment of the present invention.

FIG. 4 is a cross-sectional view of a gas / liquid mixing device according to a first embodiment of the present invention.

FIG. 5 is a view showing a first embodiment of the present invention and is a front view of a gas / liquid mixing device.

FIG. 6 is a side view of a bolt screwed onto the shaft in the first embodiment of the present invention.

FIG. 7 is a front view of a bolt screwed on the shaft in the first embodiment of the present invention.

FIG. 8 is a cross-sectional view of a washer which is interposed when the bolt is screwed in, showing the first embodiment of the present invention.

FIG. 9 is a cross-sectional view of the flange of the first embodiment of the present invention.

FIG. 10 is a front view of the flange of the first embodiment of the present invention.

FIG. 11 is a sectional view of a turbo vane showing the first embodiment of the present invention.

FIG. 12 is a front view of a turbo vane showing the first embodiment of the present invention.

FIG. 13 is a cross-sectional view of a turbo runner showing the first embodiment of the present invention.

FIG. 14 is a front view of the turbo runner showing the first embodiment of the present invention.

FIG. 15 is a sectional view of the turbo suction, showing the first embodiment of the present invention.

FIG. 16 is a front view of the turbo suction, showing the first embodiment of the present invention.

FIG. 17 is a view showing the first embodiment of the present invention and is a front view of the baffle piece.

FIG. 18 is a cross-sectional view of the baffle piece showing the first embodiment of the present invention.

FIG. 19 is a sectional view of the impeller, showing the first embodiment of the present invention.

FIG. 20 is a front view of the impeller according to the first embodiment of the present invention.

FIG. 21 is a side view of the shaft according to the first embodiment of the present invention.

FIG. 22 is a sectional view of the casing showing the first embodiment of the present invention.

FIG. 23 is a view showing the first embodiment of the present invention and is a front view of the casing.

FIG. 24 is a view showing the first embodiment of the present invention and is a cross-sectional view of the ground cover.

FIG. 25 is a plan view of the ground cover according to the first embodiment of the present invention.

FIG. 26 is a front view of the bracket according to the first embodiment of the present invention.

FIG. 27 is a half sectional view of the bracket in the view showing the first embodiment of the present invention.

FIG. 28 is a front view of the bearing pressing member according to the first embodiment of the present invention.

FIG. 29 is a view showing the first embodiment of the present invention and is a half sectional view of the bearing pressing member.

FIG. 30 is a cross-sectional view of the gas / liquid mixing device according to the second embodiment of the present invention.

FIG. 31 is a side view of the mixing vane showing the second embodiment of the present invention.

FIG. 32 is a plan view of the mixing vane showing the second embodiment of the present invention.

FIG. 33 is a sectional view of a turbo vane showing a second embodiment of the present invention.

FIG. 34 is a view showing a second embodiment of the present invention and is a plan view showing a half of a turbo vane.

FIG. 35 is a half cross-sectional view of a turbo runner showing a second embodiment of the present invention.

FIG. 36 is a plan view showing a half of a turbo runner according to the second embodiment of the present invention.

FIG. 37 is a sectional view of the baffle piece in the view showing the second embodiment of the present invention.

FIG. 38 is a plan view of the baffle piece according to the second embodiment of the present invention.

FIG. 39 is a sectional view of the bow sleeve according to the second embodiment of the present invention.

FIG. 40 is a plan view of the bow sleeve according to the second embodiment of the present invention.

FIG. 41 is a sectional view of the stage partition plate in a diagram showing a second embodiment of the present invention.

FIG. 42 is a plan view of a stage partition plate in a diagram showing a second embodiment of the present invention.

FIG. 43 is a cross-sectional view of the impeller, showing the second embodiment of the present invention.

FIG. 44 is a plan view of the impeller according to the second embodiment of the present invention.

FIG. 45 is a sectional view of the reaction chamber showing the second embodiment of the present invention.

FIG. 46 is a plan view of the reaction chamber showing the second embodiment of the present invention.

FIG. 47 is a view showing a third embodiment of the present invention, and is a configuration diagram showing a configuration of a coating booth in the coating booth purification device.

[Explanation of symbols]

 1 Painting Booth 3 Water Flow Board 5 First Water Tank 7 Second Water Tank 9 Partition Plate 13 Dust Collector 21 Pump 25 Piping 27 Piping 29 Piping 29 Mixing Equipment 31 Piping 35 PSA 37 Ozonizer 39 Piping 41 Filter 43 Piping 45 Shower 47 47 Jetting Equipment

Claims (5)

[Claims] 1. A water tank provided at the bottom of a coating booth for containing cleaning water that flows down in a state containing floating paint mist; and a water flow provided in the coating booth by taking out the cleaning water from the water tank. A first cleaning water circulation device that flows down along the water flow plate from above the plate, and the cleaning water containing paint mist near the liquid surface in the water tank is taken out and introduced into the mixing device, and ozone generated separately is mixed with the above. Introduced into the equipment to contact and react the cleaning water containing paint mist with ozone, then collect the paint mist by the filter and then inject the cleaned cleaning water through the shower device arranged in the coating booth. And a second cleaning water circulation device for allowing the coating booth purification device to be provided. 2. The coating booth purification device according to claim 1, wherein in the second cleaning water purification device, a centrifugal separator is arranged in front of the mixing device, and the cleaning water containing the paint mist is passed through the centrifugal separator. A paint booth purification device characterized by being introduced into a post-mixing device. 3. The coating booth purifying apparatus according to claim 1 or 2, wherein the water tank has a two-stage structure, and
The cleaning water flowing down along the water flow plate of the cleaning water circulation device and the cleaning water sprayed from the shower device of the second cleaning water circulation device flow down into the first water tank, and then flow over the partition plate to the second water tank.
A paint booth purification device, which is configured to flow into a water tank. 4. The coating booth purification apparatus according to claim 1, 2 or 3, wherein a dust collector is installed behind the water plate in the coating booth. Booth purification equipment. 5. The coating booth purifying apparatus according to claim 1, 2 or 3, wherein a jet device is provided behind the water tank and near the liquid surface. A paint booth purification device that does.