JP2019155281A - Tar removal device for coating drying furnace - Google Patents

Abstract

To provide a tar removal device for a coating drying furnace capable of removing efficiently tar contained in high temperature air from the coating drying furnace.SOLUTION: A tar removal device 10 for a coating drying furnace includes: a cylindrical cyclone container 20 having a suction part 21 communicating with a furnace inner space 3 of a coating drying furnace 2, a turning treatment space 23 for sucking and turning high temperature air A containing tar N from the furnace inner space 3 through the suction part 21, and an exhaust part 25 for exhausting separation air B from the turning treatment space 23; and a cooling device 30 for cooling the cyclone container 20 by utilizing heat transfer to cooling water C.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a spear removal apparatus attached to a paint drying furnace.

  Conventionally, in a process of forming a coating film on a workpiece such as an automobile body or an automobile-related part, the coated workpiece is dried while being conveyed in a coating drying furnace. In the interior space of the paint drying furnace, smoke-like gas is generated from the heated paint. This gas is mainly composed of a paint component that is vaporized in a high temperature state (hereinafter, simply referred to as “resin”), and has a property of condensing and becoming liquefied or solidified in a low temperature state.

  If the high-temperature air in the furnace space of the paint drying furnace is cooled in the low temperature region at the inlet and outlet, it will be easy to condense, and if the condensed dust falls and adheres to the workpiece, it will cause quality degradation. obtain. Further, when the evaporated vapor is exhausted to the outside of the paint drying furnace, it is cooled and adhered to the peripheral equipment or ceiling of the paint drying furnace. For this reason, there has been a problem that it is necessary to periodically perform a cleaning operation for removing the paint adhering to the coating drying furnace and its surroundings.

  Therefore, Patent Document 1 below proposes a paint waste gas exhaust duct (hereinafter simply referred to as “exhaust duct”) for coping with such a problem. The exhaust duct is configured such that high-temperature air in the interior space of the paint drying furnace flows through the bent portion of the hood structure. According to this exhaust duct, the dust contained in the high-temperature air is condensed on the inner surface of the duct curved portion in contact with the outside air, collected in the funnel portion, and collected in the cartridge container. Moreover, it is trying to suppress the temperature rise of a duct curved part by providing a heat sink and a radiation fin in the outer surface of a duct curved part.

JP 2013-255865 A

  However, in the case of the above-mentioned exhaust duct, it is difficult to obtain a sufficient cooling effect simply by flowing high-temperature air through the duct bend, and even if a heat sink or heat radiating fin is added to the outer surface of the duct bend, it is efficient from high-temperature air. There is room for improvement to recover well.

  The present invention has been made in view of such a problem, and an object of the present invention is to provide a paint-removing furnace spear-removing device that can efficiently recover spear contained in high-temperature air of a paint-drying furnace.

One embodiment of the present invention provides:
A paint removal furnace spear removal device attached to a paint drying furnace,
An intake portion communicating with the furnace space of the paint drying furnace, a swirl processing space for sucking and swirling high-temperature air containing spear from the furnace space through the intake portion, and exhausting separated air from the swirl processing space A cylindrical cyclone container having an exhaust part;
A cooling device for cooling the cyclone container using heat transfer between the refrigerant and the cyclone container;
A paint removal furnace spear removal device comprising:
It is in.

  In the paint drying furnace spear removing device, the high-temperature air in the interior of the paint drying furnace is sucked from the intake portion of the cyclone container and swirls in the swirl processing space. On the other hand, the cyclone container is cooled by the refrigerant of the cooling device. At this time, the high-temperature air in the swirl processing space swirls in the circumferential direction while contacting the inner wall surface of the cyclone container cooled by the refrigerant of the cooling device. For this reason, the contact time between high temperature air and the inner wall surface of the cyclone container can be increased, and heat transfer from the high temperature air to the refrigerant side is promoted. In this case, the cooling effect of high temperature air can be enhanced.

  In addition, the condensate is condensed by the cooling of the high-temperature air, and this condensate is centrifugally separated by centrifugal force when swirling in the circumferential direction according to the swirling flow, and is pressed against and adhered to the inner wall surface of the cyclone container. For this reason, the condensed spear can be efficiently recovered using the centrifugal separation effect of the cyclone container. In this case, it is possible to prevent the deterioration of the work quality caused by the stain, and it is possible to reduce the maintenance work cost by reducing the cleaning work for removing the stain. On the other hand, the separated air after the spear is centrifuged is exhausted to the outside of the cyclone container through the exhaust part.

  As described above, according to the above aspect, it is possible to provide a paint drying furnace spear removing device that can efficiently recover spear contained in high-temperature air of a paint drying furnace.

1 is a schematic diagram of a paint drying facility according to Embodiment 1. FIG. FIG. 2 is a side view of the paint drying furnace dust removing device in FIG. 1. FIG. 3 is a cross-sectional view taken along line III-III in FIG. 2. The perspective view which shows a mode that high temperature space is processed with the cyclone container in FIG. FIG. 5 is a cross-sectional view taken along line V-V in FIG. 4. The schematic diagram concerning the example of a change of the painting drying equipment of FIG. FIG. 6 is a side view of a paint drying furnace spear removing device according to a second embodiment.

  Preferred embodiments of the above aspects are described below.

  In the paint drying furnace spider removing device, the cooling device connects a cooling container having a refrigerant retention space provided on the outer periphery of the cyclone container with a cylindrical wall therebetween, and an inlet and an outlet of the cooling container. And a heat exchanger that cools the refrigerant flowing through the refrigerant circulation channel from the outlet to the inlet.

  According to this spear removing device, the refrigerant heated by heat transfer with the high-temperature air in the refrigerant retention space of the cooling container flows out from the outlet of the cooling container and flows through the refrigerant circulation passage, and then the inlet Return to the cooling vessel. At this time, since the refrigerant flowing through the refrigerant circulation channel is cooled by the heat exchanger, the cooling effect of the high-temperature air can be maintained in a high state.

  In the paint drying furnace spear removing device, the heat exchanger cools the refrigerant flowing through the refrigerant circulation flow path by heat exchange with the separated air exhausted through the exhaust part of the cyclone container. It is preferable to be configured as described above.

  According to this spear removing device, the separated air exhausted from the cyclone container can be used as a low temperature side medium when the refrigerant flowing through the refrigerant circulation passage of the cooling device is cooled in the heat exchanger.

  In the paint drying furnace spear removing device, the cyclone container has the exhaust part communicating with the interior space of the paint drying furnace through an exhaust communication pipe, and the cooling device includes the refrigerant circulation channel. A heat pump for heating the refrigerant flowing from the outlet of the cooling container to the heat exchanger and cooling the refrigerant flowing through the refrigerant circulation channel from the heat exchanger to the inlet of the cooling container; It is preferable to provide.

  According to this spear removing device, the separated air heated by the heat exchanger after being exhausted from the cyclone container is supplied to the interior space of the paint drying furnace through the exhaust communication pipe. For this reason, it can prevent that isolation | separation air is supplied to the in-furnace space of a coating drying furnace in a low temperature state. In addition, by supplying the separation air to the interior space of the paint drying furnace, it is possible to prevent loss of thermal energy that occurs when the separation air is discharged to the outside of the paint drying furnace.

  In the paint drying furnace spider removing device, the cyclone container has an air inlet communicating with the interior space of the paint drying furnace through an intake communication pipe, an inlet portion of the intake communication pipe and the exhaust communication It is preferable that any of the outlet portions of the pipe is configured to be disposed in at least one of the inlet side air seal portion and the outlet side air seal portion in the furnace space of the coating drying furnace.

  According to this spear removing device, high-temperature air is sucked into the cyclone container from the air seal part of the paint drying furnace through the intake communication pipe, and separated air is returned from the cyclone container to the air seal part of the paint drying furnace through the exhaust communication pipe. In this case, the airtightness can be ensured by the flow of the separation air in the air seal portion, and it is possible to prevent the dust generated in the interior space of the coating drying furnace from diffusing outside the furnace. And since it is not necessary to provide apparatuses, such as a dedicated air blower, for an air seal part by utilizing isolation | separation air, the apparatus cost which a spear removal apparatus requires can be suppressed low.

  In the above-described paint drying furnace spear removing device, the cyclone container includes a large-diameter cylindrical portion provided with the intake portion, a small-diameter cylindrical portion whose cylindrical diameter is smaller than the large-diameter cylindrical portion, and the large-diameter cylindrical portion. And a tapered conical cylinder part whose inner diameter gradually decreases from the small diameter cylinder part to a small diameter cylinder part, and a spear receiving container is preferably connected to a sprout outlet provided in the small diameter cylinder part.

  In this spear removing device, the high-temperature air sucked from the suction part of the cyclone container turns while gradually reducing the turning diameter from the large-diameter cylinder part side toward the small-diameter cylinder part side. At this time, the condensate condensed by cooling is subjected to centrifugal force when swirling in the circumferential direction according to the swirl flow, and this centrifugal force becomes stronger as the swirl diameter is smaller. For this reason, spear can be collect | recovered from a cyclone container to a spear receiving container through the spout discharge port of the small diameter cylinder part where the centrifugal separation effect becomes the highest.

  In the above paint drying furnace spear removing device, the cyclone container is preferably configured such that the cylinder axis extends along the vertical direction and the small diameter cylindrical portion is disposed at the lowest position.

  According to this spear removing device, by arranging the cyclone container so that the cylinder axis extends along the vertical direction, the spear can be collected in the spear receiving container using the gravity acting on the spear. For this reason, it is possible to prevent the residue from remaining on the inner wall surface of the cyclone container. In this case, the inner wall surface of the cyclone container can be continuously used as a cooling surface for high-temperature air.

  Hereinafter, an embodiment of a spear removing apparatus attached to a paint drying furnace will be described with reference to the drawings.

  In the drawings for explaining this embodiment, unless otherwise specified, the conveyance direction of the workpiece in the paint drying furnace is indicated by an arrow D. The horizontal direction is indicated by an arrow X, the vertical direction is indicated by an arrow Y, and the circumferential direction is indicated by an arrow Z.

(Embodiment 1)
As shown in FIG. 1, a paint drying facility 1 according to the first embodiment includes a paint drying furnace (hereinafter simply referred to as “drying furnace”) 2 for drying a workpiece W that is an automobile body after painting, and a drying furnace. 2, two stain removing devices 10 as paint drying furnace stain removing devices attached to 2.

  The plurality of workpieces W are sequentially transported in the transport direction D by the transport carriage 7 toward the drying furnace 2 after the coating process, and are introduced into the in-furnace space 3 of the drying furnace 2. The in-furnace space 3 includes a main drying region 3a, an inlet side air seal portion 3b provided on the upstream side of the main drying region 3a, and an outlet side air seal portion 3c provided on the downstream side of the main drying region 3a. Have.

  A hot air generator 4 is provided in the main drying region 3a. For this reason, the substantial drying process of the workpiece | work W is performed in the main drying area | region 3a by the circulating heating of the air by the hot air generator 4. FIG.

  One of the two spear removal apparatuses 10 has a first spear removal apparatus 10 </ b> A having an intake communication pipe 5 and an exhaust communication pipe 6, and the furnace of the drying furnace 2 through the intake communication pipe 5 and the exhaust communication pipe 6. It is connected to the inner space 3. In the first spear removing device 10 </ b> A, the inlet portion 5 a of the intake communication pipe 5 and the outlet portion 6 a of the exhaust communication pipe 6 are both arranged in the inlet-side air seal portion 3 b in the furnace space 3. Therefore, high-temperature air is introduced from the inlet side air seal portion 3b through the intake communication pipe 5 into the first spear removal device 10A and processed, and the processed air is returned to the inlet side air seal portion 3b through the exhaust communication pipe 6. It has become.

  The other second spear removal device 10B of the two spear removal devices 10 has the same intake communication pipe 5 and exhaust communication pipe 6 as those of the first spear removal device 10A. It is connected to the in-furnace space 3 of the drying furnace 2 through the communication pipe 6. In the second spear removing device 10B, the inlet portion 5a of the intake communication pipe 5 and the outlet portion 6a of the exhaust communication pipe are both arranged in the outlet-side air seal portion 3c in the furnace space 3. Therefore, high-temperature air is introduced from the outlet side air seal portion 3c through the intake communication pipe 5 into the second spear removal device 10B and processed, and the processed air is returned to the outlet side air seal portion 3c through the exhaust communication pipe 6. It has become.

  Here, with reference to FIG. 2 and FIG. 3, a specific structure of the first spear removing apparatus 10A will be described. In addition, since the structure of two spear removal apparatuses 10 is the same, below, one 1st spear removal apparatus 10A is demonstrated as the spear removal apparatus 10, and the description about the structure of the other 2nd spear removal apparatus 10B is given below. Omitted.

  As shown in FIG. 2, the spider removing device 10 includes a cyclone container 20 and a cooling device 30.

  The cyclone container 20 is a fixed cylindrical container that does not rotate itself, and is mainly made of a metal material. The cyclone container 20 includes an intake portion 21, a swirl processing space 23, a spear discharge port 24, and an exhaust portion 25.

  The intake portion 21 is an opening that communicates with the in-furnace space 3 of the paint drying furnace 2 through the intake communication pipe 5. The swirl processing space 23 is a space for sucking and swirling high-temperature air A containing spear N from the in-furnace space 3 through the intake portion 21. The spear discharge port 24 is an opening for discharging spear N from the turning processing space 23 and is always open. The exhaust unit 25 is an opening for exhausting the separation air B from the swirl processing space 23, and communicates with the in-furnace space 3 of the paint drying furnace 2 through the exhaust communication pipe 6. The exhaust part 25 extends in the vertical direction Y on the cylinder axis L (see FIG. 3).

  Here, Jani N is a paint Jani component generated from a heated paint, and is typically a compound in which a curing agent (isocyanate) or blocking agent (alcohols, oximes) contained in the paint is oxidized and polymerized. It is constituted by. This Nani N has a property of being vaporized at a high temperature state to become a fume-like substance, and condensing to be liquefied or solidified at a low temperature state.

  An exhaust fan 26 is connected to the exhaust communication pipe 6. The exhaust fan 26 is configured as a blower that generates an air flow from the intake portion 21 to the exhaust portion 25 in the swirl processing space 23 of the cyclone container 20 by a suction action during operation.

  Instead of this, a blower is connected to the intake part 21 of the cyclone container 20 or a blower is connected to both the intake part 21 and the exhaust part 25, and the cyclone container 20 is used by using this blower. An air flow can also be generated in the turning processing space 23.

  The main body 22 that divides the swirl processing space 23 of the cyclone container 20 includes a large-diameter cylindrical portion 22a provided with an intake portion 21, a small-diameter cylindrical portion 22c having a cylindrical diameter smaller than that of the large-diameter cylindrical portion 22a, and a large-diameter cylinder. And a tapered conical cylinder part 22b whose inner diameter gradually decreases from the part 22a toward the small diameter cylinder part 22c.

  The inner wall surface 20 b of the cylindrical wall 20 a of the cyclone container 20 is configured as a cooling surface for cooling the high temperature air A. For this reason, it is preferable that the inner wall surface 20b of the cyclone container 20 is comprised with a metal material with high heat conductivity. Moreover, you may make it provide a coating layer with high heat conductivity in this inner wall surface 20b as needed.

  The cyclone container 20 is configured such that the cylinder axis L extends along the vertical direction Y and the small-diameter cylinder portion 22c is disposed at the lowest position. A spear receiving container 40 is connected to a spear discharge port 24 provided in the small diameter cylindrical portion 22c. For this reason, the spear N in the turning processing space 23 is collected in the spear receiving container 40 through the spout outlet 24 of the small diameter cylindrical portion 22c.

  The cooling device 30 has a function of cooling the cyclone container 20 by using heat transfer with the cooling water C as a refrigerant. The cooling device 30 includes a cooling container 31, a refrigerant circulation channel 35, a heat exchanger 36, and a heat pump 37.

  The cooling water C can be changed to a refrigerant such as a fluorocarbon refrigerant, a chlorofluorocarbon refrigerant, an alcohol refrigerant, or a ketone refrigerant as necessary.

  The cooling container 31 has a refrigerant retention space 32 provided on the outer periphery of the cyclone container 20 with a cylindrical wall 20a therebetween. For this reason, the cooling vessel 31 has an annular cross-sectional shape in the horizontal direction X, and has a cylindrical wall 31a concentric with the cylindrical wall 20a with the cylindrical axis L as the center (see FIG. 3).

  The refrigerant circulation channel 35 is a channel that connects the inlet 33 and the outlet 34 of the cooling container 31. The refrigerant circulation channel 35 includes a first connection pipe 35 a extending from the outlet 34 of the cooling container 31 to the heat pump 37, and a second connection pipe 35 b returning from the heat pump 37 to the heat pump 37 via the heat exchanger 36. The third connecting pipe 35c extends from the heat pump 37 to the inlet 33 of the cooling container 31.

  The heat exchanger 36 has a function of cooling the cooling water C flowing from the outlet 34 of the cooling container 31 to the inlet 33 through the refrigerant circulation passage 35. The heat exchanger 36 is configured to cool the cooling water C flowing through the refrigerant circulation passage 35 by heat exchange with the separated air B exhausted through the exhaust part 25 of the cyclone container 20. In this heat exchanger 36, the cooling water C becomes a high temperature side medium, and the separated air B becomes a low temperature side medium.

  The heat pump 37 heats the cooling water C flowing through the refrigerant circulation passage 35 from the outlet 34 of the cooling container 31 to the heat exchanger 36, and passes the refrigerant circulation passage 35 from the heat exchanger 36 to the inlet of the cooling container 31. The cooling water C flowing to 33 is cooled.

  In order to achieve this function, the heat pump 37 includes a flow path 37a for the refrigerant Ca, and a compressor 37b, an expansion valve 37c, an evaporator 37d, and a condenser 37e, all provided on the flow path 37a. ing. The temperature and pressure of the refrigerant Ca circulating in the flow path 37a are adjusted by the compressor 37b and the expansion valve 37c. As the refrigerant Ca, a carbon fluoride refrigerant, a fluorocarbon refrigerant, an alcohol refrigerant, a ketone refrigerant, or the like is typically used.

  In the flow path 37a of the heat pump 37, the refrigerant Ca compressed by the compressor 37b reaches a high temperature and flows through the condenser 37e, so that the cooling water C flows from the first connection pipe 35a to the second connection pipe. When it flows to 35b, it is heated via this condenser 37e.

  Further, in the flow path 37a of the heat pump 37, the refrigerant Ca whose pressure has suddenly decreased by the expansion valve 37c becomes a low temperature and flows through the evaporator 37d. Therefore, the cooling water C passes through the refrigerant circulation path 35 through the second connecting pipe 35b. Is cooled through the evaporator 37d when flowing to the third connecting pipe 35c.

  In addition, when the separation air B exhausted through the exhaust part 25 of the cyclone container 20 can be heated to a desired temperature in the heat exchanger 36 without using the heat pump 37, the heat pump 37 can be omitted. .

  Next, the operation of the above-mentioned dust removal apparatus 10 will be described.

  As shown in FIG. 4, due to the suction action during operation of the exhaust fan 26, an air flow from the intake portion 21 to the exhaust portion 25 is generated in the swirl processing space 23 of the cyclone container 20. As a result, the high-temperature air A containing the vaporized spider N is sucked from the intake portion 21 and swirls in the circumferential direction Z in the swirl processing space 23.

  The hot air A forms a swirling flow Sa along the inner wall surface 20b of the cyclone container 20, and flows from the large-diameter cylindrical portion 22a side to the small-diameter cylindrical portion 22c side while increasing the flow velocity. At this time, the inner wall surface 20b of the cyclone container 20 is a cooling surface cooled by the cooling water C retained in the refrigerant retention space 32 of the cooling container 31 (see FIG. 3). For this reason, the hot air A is cooled by contacting the inner wall surface 20b at the time of turning, and the burrs N contained in the hot air A are condensed and liquefied. And this high temperature air A is centrifuged by the specific gravity difference into Yani N and separation air B.

  As shown in FIGS. 4 and 5, the spear N is pressed against the inner wall surface 20 b in response to the centrifugal force F generated by the swirling flow Sa. In particular, since the turning diameter becomes smaller from the large-diameter cylindrical portion 22a toward the small-diameter cylindrical portion 22c, the centrifugal force F acting on the spear N is increased. For this reason, the burrs N are strongly pressed against the inner wall surface 20b toward the small-diameter cylindrical portion 22c and are easily attached. Then, the spear N attached to the inner wall surface 20 b or descending the swivel processing space 23 is discharged from the spout outlet 24 of the small diameter cylindrical portion 22 c according to gravity and continuously collected in the spear receiving container 40.

  The flow velocity of the high-temperature air A in the swirl processing space 23 of the cyclone container 20 is smaller in the region near the center of the swirl flow Sa than in the surrounding region. For this reason, this region is easily affected by the suction force of the exhaust fan 26. Accordingly, the separated air B after being centrifuged from the high-temperature air A has a specific gravity smaller than that of the spear N, so that the straight flow Sb that flows linearly toward the exhaust portion 25 in the region near the center of the swirling flow Sa. Form. The separated air B is sucked by the exhaust fan 26 and exhausted from the exhaust part 25, and then supplied to the inlet side air seal part 3b and the outlet side air seal part 3c through the exhaust communication pipe 6 to be used for the air seal (FIG. 1). reference).

  According to the first embodiment described above, the following operational effects can be obtained.

  In the above-described spear removing apparatus 10, the high-temperature air A in the furnace space 3 of the paint drying furnace 2 is sucked from the intake portion 21 of the cyclone container 20 and swirls in the swirl processing space 23. On the other hand, the cyclone container 20 is cooled by the refrigerant of the cooling device 30. At this time, the high-temperature air A in the swirl processing space 23 swirls in the circumferential direction Z while being in contact with the inner wall surface 20b of the cyclone container 20 cooled by the cooling water C. For this reason, the contact time of the high temperature air A and the inner wall surface 20b of the cyclone container 20 can be increased, and the heat transfer from the high temperature air A to the cooling water C side is promoted. In this case, the cooling effect of the high temperature air A can be enhanced.

  Moreover, the cooling of the high temperature air A condenses the N, and this condensed N is subjected to centrifugal separation by receiving the centrifugal force F when swirling in the circumferential direction Z according to the swirling flow Sa, and the inner wall surface of the cyclone container 20 It is pressed against 20b and adheres. For this reason, the condensed ani N can be efficiently recovered using the centrifugal separation effect of the cyclone container 20. In this case, it is possible to prevent the quality deterioration of the workpiece W caused by the spear N, and it is possible to reduce the maintenance work cost by reducing the cleaning work for removing the spear N. On the other hand, the separated air B after the spear N is centrifuged is exhausted to the outside of the cyclone container 20 through the exhaust part 25.

  Further, according to the above-described spear removing device 10, the cooling water C heated by heat transfer with the high-temperature air A in the refrigerant retention space 32 of the cooling container 31 flows out from the outlet 34 of the cooling container 31. After flowing through the refrigerant circulation passage 35, the refrigerant returns from the inlet 33 to the cooling container 31. At this time, since the cooling water C flowing through the refrigerant circulation passage 35 is cooled by the heat exchanger 36, the cooling effect of the high temperature air A can be maintained in a high state.

  Further, according to the above-mentioned spear removing device 10, the separated air exhausted from the cyclone container 20 as a low temperature side medium when the cooling water C flowing through the refrigerant circulation passage 35 of the cooling device 30 is cooled in the heat exchanger 36. B can be used.

  Further, according to the above-described spear removing device 10, the separated air B heated by the heat exchanger 36 after being exhausted from the cyclone container 20 is supplied to the in-furnace space 3 of the coating drying furnace 2 through the exhaust communication pipe 6. The For this reason, it is possible to prevent the separation air B from being supplied to the in-furnace space 3 of the coating drying furnace 2 at a low temperature. In addition, by supplying the separation air B to the in-furnace space 3 of the paint drying furnace 2, it is possible to prevent the loss of thermal energy that occurs when the separation air B is discharged to the outside of the drying furnace 2.

  Further, according to the above-described spear removing device 10, the high-temperature air A is sucked into the cyclone container 20 from the air seal portions 3 b and 3 c of the drying furnace 2 through the intake communication pipe 5 and separated air from the cyclone container 20 through the exhaust communication pipe 6. B is returned to the air seal portions 3b and 3c of the drying furnace 2. In this case, the airtightness can be ensured by the flow of the separation air B in the air seal portions 3b and 3c, and it is possible to prevent the spear N generated in the in-furnace space 3 of the drying furnace 2 from diffusing outside the furnace. Moreover, since it is not necessary to provide a device such as a dedicated blower for the air seal portions 3b and 3c by using the separation air B, the device cost required for the spider removing device 10 can be kept low.

  Further, in the above-described spider removing device 10, the high temperature air A sucked from the intake portion 21 of the cyclone container 20 gradually turns its turning diameter toward the conical cylinder portion 22 b from the large diameter cylinder portion 22 a toward the small diameter cylinder portion 22 c. Turn while small. The ani N condensed by cooling at this time receives centrifugal force F and is centrifuged when swirling in the circumferential direction Z according to the swirling flow Sa. The centrifugal force F increases as the swirling diameter decreases. For this reason, it is possible to collect the sprout from the cyclone container 20 to the spear receiving container 40 through the sprout discharge port 24 of the small diameter cylindrical part 22c where the centrifugal separation effect becomes the highest.

  Further, according to the above-described spear removing device 10, the cyclone container 20 is arranged so that the cylinder axis L extends along the vertical direction Y, whereby the spear receiving container 40 is utilized using the gravity acting on the spear N. Yani N can be recovered. For this reason, it is possible to prevent Yani N from remaining on the inner wall surface 20 b of the cyclone container 20. In this case, the inner wall surface 20b of the cyclone container 20 can be continuously used as a cooling surface for the high-temperature air A.

  In addition, although the above-mentioned coating drying equipment 1 is provided with the two spear removal apparatuses 10 attached to the air seal parts 3b and 3c, the number of the spear removal apparatuses 10 is not limited to two, and The attachment location is not limited to the air seal portions 3b and 3c.

  For example, as a modification of the paint drying equipment 1, a paint drying equipment 1 'shown in FIG. 6 can be employed. In this coating / drying equipment 1 ′, the number of the stain removing devices 10 is one, and the place where the stain removing device 10 is attached is the main drying region 3 a in the furnace space 3 of the drying furnace 2. That is, both the inlet part 5a of the intake communication pipe 5 and the outlet part 6a of the exhaust communication pipe 6 are arranged in the main drying region 3a. On the other hand, an air seal device 8 having the same structure is attached to each of the air seal portions 3b and 3c in the in-furnace space 3 of the drying furnace 2.

  As a further modification of the paint drying equipment 1 ′, a structure in which the dust removing device 10 is attached to one of the two air seal portions 3 b and 3 c can also be adopted. Further, a structure in which the dust removing device 10 is attached to all three locations of the main drying region 3a and the air seal portions 3b and 3c in the in-furnace space 3 of the drying furnace 2 may be employed. According to this structure, the recovery performance of the spear N can be enhanced by using the three spear removal apparatuses 10 simultaneously.

  Another embodiment related to the first embodiment will be described with reference to the drawings. In other embodiments, the same elements as those of the first embodiment are denoted by the same reference numerals, and the description of the same elements is omitted.

(Embodiment 2)
As shown in FIG. 7, the spear removing device 110 according to the second embodiment includes a cyclone container 120 and a cooling device 130.

  The cyclone container 120 has an exhaust part 125 for exhausting the separation air B. The exhaust part 125 is composed of a long pipe, and is configured such that the dimension in the vertical direction Y is significantly larger than the dimension in the vertical direction Y of the exhaust part 25 in the first embodiment. According to this configuration, the region where the separated air B can exchange heat with the cooling water C is increased by making the exhaust part 125 longer.

The cooling device 130 cools the cyclone container 120 using heat transfer with the cooling water C as a refrigerant, and includes a cooling container 131 having a refrigerant storage space 132 on the outer periphery of the cyclone container 120. . In the cooling container 131, the coolant storage space 132 is a closed space, and the coolant C is stored in the coolant storage space 132. Further, substantially the entire exhaust part 125 is disposed in the refrigerant storage space 132. As described above, the cooling device 130 includes only the cooling container 131 and does not include other elements (the refrigerant circulation channel 35, the heat exchanger 36, and the heat pump 37) like the cooling device 30 of the first embodiment.
As in the case of the first embodiment, the cooling water C can be changed to a refrigerant such as a fluorocarbon refrigerant, a chlorofluorocarbon refrigerant, an alcohol refrigerant, or a ketone refrigerant as necessary.

  Other configurations are the same as those of the first embodiment.

  A part of the cooling water C stored in the refrigerant storage space 132 of the cooling container 131 is heated and evaporated by heat exchange with the high-temperature air A sucked into the swirl processing space 23 of the cyclone container 120 to be vaporized. become. In addition, a part of the gas phase is cooled and condensed by heat exchange with the separation air B flowing through the exhaust part 125 to become a liquid phase. As a result, a vapor-liquid equilibrium state of the cooling water C is formed in the refrigerant storage space 132 of the cooling container 131.

  Other configurations are the same as those of the first embodiment.

According to the second embodiment, since the number of components of the cooling device 130 can be smaller than the number of components of the cooling device 30 in the first embodiment, the device cost required for the cooling device 130 can be kept low. Moreover, the space required for installation can be reduced.
In addition, the same effects as those of the first embodiment are obtained.

  The present invention is not limited to the first and second embodiments described above, and various applications and modifications can be considered without departing from the object of the present invention. For example, the following embodiments can be implemented by applying the embodiments.

  In the above-described embodiment, the case where the high temperature air A is sucked from the inner space 3 of the drying furnace 2 and the separated air B from which the nib N is separated is discharged into the same region as the intake region of the high temperature air A is illustrated. The intake area of the high temperature air A and the exhaust area of the separation air B may be different. Further, the exhaust region of the separation air B may be outside the drying furnace 2.

  In the above-described embodiment, the case where the cyclone container 20 having the large-diameter cylindrical portion 22a, the conical cylindrical portion 22b, and the small-diameter cylindrical portion 22c is used is illustrated, but the structure of the cyclone container 20 is limited to this. It is not a thing and it can change suitably as needed. For example, a structure having only a portion corresponding to the conical cylinder portion 22b or a structure having only a portion corresponding to at least one of the large diameter cylinder portion 22a and the small diameter cylinder portion 22c may be employed. Further, if the cyclone container 20 is cylindrical, the cross-sectional shape thereof may be an ellipse, a triangle, a quadrangle, a polygon, etc. in addition to a circle.

  In the above-described embodiment, the case where the cyclone container 20 is arranged in a state where the cylinder axis L extends along the vertical direction Y is illustrated, but instead, the cyclone container 20 is arranged so that the cylinder axis L is perpendicular to the vertical direction Y. It can also arrange | position in the state inclined with respect to arbitrary angles.

  In the above-described embodiment, the case where the spout N is discharged from the spout outlet 24 provided in the small-diameter cylindrical portion 22c of the cyclone container 20 is illustrated, but instead, the spout outlet 24 is closed and the cyclone container 20 is closed. It is also possible to temporarily store the spear N in the small diameter cylindrical portion 22c and to open the spear discharge port 24 only when the spout N is discharged.

  In the above-described embodiment, the spear removing apparatuses 10 and 110 attached to the drying furnace 2 that dries the automobile body after painting are illustrated. However, the essential structure of the spear removing apparatuses 10 and 110 is an automobile-related component other than the automobile body. In addition, the present invention can be applied to a drying furnace in which a workpiece in a field other than an automobile is dried after painting.

DESCRIPTION OF SYMBOLS 1,1 'Paint drying equipment 2 Paint drying furnace 3 Furnace space 3b Inlet side air seal part 3c Outlet side air seal part 5 Intake communication pipe 5a Inlet part 6 Exhaust communication pipe 6a Outlet part 10,110 Paint removal furnace dust removal device ( Soil removal device)
DESCRIPTION OF SYMBOLS 10A 1st spear removal apparatus 10B 2nd spear removal apparatus 20,120 Cyclone container 20a Cylindrical wall 21 Intake part 22a Large diameter cylindrical part 22b Conical cylindrical part 22c Small diameter cylindrical part 23 Swivel processing space 24 Yani discharge port 25,125 Exhaust part 30 , 130 Cooling device 31, 131 Cooling vessel 32 Refrigerant retention space 33 Inlet 34 Outlet 35 Refrigerant circulation channel 36 Heat exchanger 37 Heat pump 40 Soil receiving vessel A High temperature air B Separation air C Cooling water (refrigerant)
L Tube axis N Yani Y Vertical direction

Claims (7)

A paint removal furnace spear removal device attached to a paint drying furnace,
An intake portion communicating with the furnace space of the paint drying furnace, a swirl processing space for sucking and swirling high-temperature air containing spear from the furnace space through the intake portion, and exhausting separated air from the swirl processing space A cylindrical cyclone container having an exhaust part;
A cooling device for cooling the cyclone container using heat transfer between the refrigerant and the cyclone container;
A paint removing furnace for removing paint.   The cooling device includes a cooling container having a refrigerant retention space provided on an outer periphery of the cyclone container with a cylindrical wall therebetween, a refrigerant circulation channel connecting an inlet and an outlet of the cooling container, and the refrigerant circulation flow The heat removal apparatus which cools the said refrigerant | coolant which flows through a channel | path from the said outflow port to the said inflow port, The spear removal apparatus for coating drying furnaces of Claim 1.   The said heat exchanger is comprised so that the said refrigerant | coolant which flows through the said refrigerant | coolant circulation flow path may be cooled by the heat exchange between the said separated air exhausted through the said exhaust part of the said cyclone container, The Claim 2 The paint removing apparatus for paint drying furnaces as described.   In the cyclone container, the exhaust part communicates with the interior space of the paint drying furnace through an exhaust communication pipe, and the cooling device exchanges the refrigerant circulation channel from the outlet of the cooling container to the heat exchange. The paint drying furnace according to claim 3, further comprising: a heat pump that heats the refrigerant flowing to a vessel and cools the refrigerant flowing through the refrigerant circulation passage from the heat exchanger to the inlet of the cooling container. Spear removal device.   In the cyclone container, the intake part communicates with the interior space of the paint drying furnace through an intake communication pipe, and the inlet part of the intake communication pipe and the outlet part of the exhaust communication pipe both have the paint drying The paint removal furnace spear removing device according to claim 4, wherein the device is configured to be disposed in at least one of the inlet side air seal portion and the outlet side air seal portion in the furnace inner space of the furnace.   The cyclone container has a large-diameter cylindrical portion provided with the intake portion, a small-diameter cylindrical portion having a cylindrical diameter smaller than the large-diameter cylindrical portion, and an inner diameter gradually decreasing from the large-diameter cylindrical portion toward the small-diameter cylindrical portion. A paint drying furnace according to any one of claims 1 to 5, wherein a paint receiving container is connected to a paint discharge port provided in the small diameter tube part. Spear removal device.   The said cyclone container is a spear removal apparatus for paint drying furnaces of Claim 6 comprised so that a cylinder axis may extend along a perpendicular direction and the said small diameter cylinder part may be arrange | positioned in the lowest place.

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