JPH10151900A - Paint releasing method and electrothermal paint releasing apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for releasing paint and an electrothermal type paint releasing apparatus for facilitating service of the apparatus with safety without fear of damaging a painting jig. SOLUTION: A painting jig 8 adhered with paint is disposed in a fluid layer in which ceramic powder 320 is in a fluidized state. Paint adhered to the jig 8 is released to be removed by bringing the paint into contact with the powder 320 of the fluidized state heated by an electrothermal heater 121, exhaust gas 161 containing fluidizing air and released paint is introduced into an electrothermal exhaust combustion equipment 17, and the paint is electrothermally heated to be burned. This contains a body apparatus 19 and the equipment 17 connected to the apparatus 19, and a treating tank 3 and a lower tank 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paint peeling method for peeling paint adhered to various coating jigs such as a paint hanger, a paint holder, a paint breaker plate, and a paint grid, and to carry out the method. The present invention relates to an electrothermal paint stripping apparatus.

[0002]

2. Description of the Related Art Conventionally, a coating jig 8 such as a hanging metal as shown in FIG. 6 has been used for coating an object to be coated. The coating jig 8 includes a hook 81 for locking an object to be coated 89 and a rod 82 to which the hook 81 is attached.
And Then, when painting the object to be coated 89, the object to be coated 89 is attached to the hook 81, and both are introduced into a painting booth or the like. Then, the paint 80 is sprayed on the both in the painting booth to paint the work 89 to be painted. The coating jig 8 has various shapes such as a lattice shape and a plate shape in addition to the hanger shape shown in FIG.

In the above-mentioned painting operation, the paint 80 is sequentially adhered to the painting jig 8 as the number of times of use increases, and the thickness thereof increases. Therefore, the above-mentioned painting jig 8
As shown in FIG. 6, the paint 80 adheres in a lump around the hooks 81 and the like as shown in FIG.

For this reason, for example, the color of the paint 80 used,
When the type or the like is changed, the painting jig 8 needs to be replaced. This is to prevent the old paint adhering to the coating jig 8 from being dissolved by the solvent or the like contained in the new paint and mixing the old and new paint. And
When reusing the coating jig 8 to which the massive paint has adhered, it is necessary to perform an operation of peeling and removing the adhered paint 80, and this operation is generally performed periodically.

[0005] Further, since the paint 80 is sequentially adhered to the coating jig 8, the work 89 is coated with the coating jig 8.
Cannot be installed in the correct orientation. In order to prevent this, it is necessary to perform an operation of peeling off the paint 80 attached.

However, conventionally, the above work is often performed manually by a worker using a spatula or the like, which is troublesome.
For this reason, there is a demand to automate this operation by a mechanical device, and some devices have been devised conventionally.

One is a "combustion type" paint peeling device. This is a device that puts the coating jig into a combustion furnace and burns and removes the paint. However, the flaking of paint in the above device is due to the burning action,
The coating jig is exposed to a high-temperature atmosphere. For this reason, peeling of the paint by the above-mentioned device may cause deformation and deterioration of the painting jig.

Another apparatus different from this is a "solvent type" paint peeling apparatus. This device is a device for dissolving and removing paint by putting the above-mentioned coating jig into a bath filled with an alkaline solution. However,
Because the alkaline solution is a dangerous chemical, the device requires careful handling. Furthermore, the treatment of used alkaline waste liquid is troublesome. Further, the alkaline liquid may damage the coating jig.

A different apparatus is a "salt bath type" paint removing apparatus. This apparatus is an apparatus in which the above-mentioned coating jig is put into a crucible filled with a molten salt such as sodium chloride or the like, and the coating material is dissolved and burned off. However, since the molten salt is a dangerous substance, the apparatus requires careful handling. Further, the treatment of the used molten salt is troublesome. Further, the molten salt may damage the coating jig.

[0010] As a different apparatus, there is a "shot blast type" paint peeling apparatus. This apparatus blows fine steel balls onto the above-mentioned coating jig using compressed air, and physically removes the paint by impact and friction. However, it is difficult for this apparatus to completely remove the paint. Furthermore, the impact when the fine steel balls are sprayed may damage and deform the coating jig. Furthermore, it is difficult to treat paint residue that has been peeled off from the coating jig.

For this reason, a gas-fired paint peeling device has been proposed as a new device replacing the above device. The gas-fired paint peeling device comprises a furnace body comprising a fluidized tank and a secondary combustion chamber provided on the upper part of the furnace body, wherein the fluidized tank is filled with quartz sand and a coating material to be peeled off the paint. There is a basket for placing the jig. Combustion gas and primary air are introduced into the fluidized tank from below the basket. Also,
The secondary combustion chamber has a pilot burner.
And secondary air is introduced.

The peeling of the paint in the above apparatus is performed as described below. First, a coating jig is placed in the basket, and then the fluidized tank is filled with quartz sand. Next, primary air and combustion gas are introduced into the fluidized tank and burned inside the fluidized tank. The quartz sand is stirred by the primary air and the combustion gas to be in a flowing state. The combustion heats the quartz sand.

As described above, the paint adhered to the coating jig is thermally decomposed by the high-temperature quartz sand and is peeled off by the frictional force acting between the quartz sand in a flowing state. A part of the paint stripped and removed in this way is burned in the quartz sand. In addition, the unburned paint rises in the fluidized tank together with the combustion exhaust gas generated by the combustion of the combustion gas and the primary air, and is introduced into the secondary combustion chamber.

In the secondary combustion chamber, the exhaust gas and unburned paint are mixed with secondary air and ignited by the pilot burner. Thereby, the exhaust gas and the unburned paint are completely burned. The gas generated by this combustion is discarded to the atmosphere after removing harmful substances through an adsorbent or the like. As described above, in the gas-fired paint peeling apparatus, the paint can be peeled from the coating jig.

[0015]

However, the gas-fired paint stripping apparatus has the following problems. First,
Since the heating of the quartz sand is performed by the combustion of the combustion gas, it is difficult to control the heating temperature of the quartz sand. For this reason, heat exceeding the heat resistance limit is applied to the coating jig, which may be damaged.

Further, a large amount of unburned gas (flammable) of the paint is generated from the paint jig placed in the fluidized tank for about 5 minutes after the paint jig is charged. In the gas-fired paint peeling apparatus, combustion gas and primary air are introduced into the fluidized tank. Since the unburned gas is further generated in this state, abnormal combustion or incomplete combustion may occur in the fluidized tank. In order to prevent the above abnormal combustion or incomplete combustion, it is necessary to control the mixing ratio between the introduced combustion gas and the primary air. However, it is difficult to know the amount of unburned gas generated. It is difficult.

Further, since the above-mentioned gas-fired paint stripping apparatus utilizes the combustion action of combustion gas, there is a possibility of gas leakage, accidents due to incomplete combustion of combustion gas, and fire. Therefore, it is always necessary for the operator to check the combustion state.

The gas-fired paint stripping apparatus requires a gas supply facility and an electric supply facility when it is installed. For this reason, installation and relocation of the apparatus are troublesome, and management of both gas supply equipment and electric supply equipment is required. From the above, the operation of the gas-fired paint stripping apparatus is troublesome.

The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a paint peeling method and an electrothermal paint peeling apparatus which do not have a risk of damaging a coating jig, are safe, and can be easily operated. It is.

[0020]

According to the first aspect of the present invention, a coating jig to which a coating material is adhered is arranged in a fluidized bed in which ceramic powder is brought into a fluidized state by introducing air for flowing, and the coating jig is provided. The paint adhered to the fixture is heated by an electric heater,
The ceramic powder in a fluidized state is separated and removed by contact, and an exhaust gas containing the flowing air and the release paint is introduced into an electrothermal exhaust combustion device, and the release paint is burned by electrothermal heating. A paint stripping method characterized in that:

As the ceramic powder, alumina powder, quartz sand, powder obtained by pulverizing fused silica, or the like is used.
Further, the average particle size is preferably from 200 to 300 μm. If it is less than 200 μm, the effect of removing the paint is small, while if it exceeds 300 μm, it is difficult to form a fluidized bed.

The operation of the present invention will be described below. In the paint stripping method according to the present invention, the flowing air causes the ceramic powder heated by the electric heater to be in a flowing state, thereby forming a fluidized bed. For this reason, friction occurs between the ceramic powder in the flowing state and the surface of the coating jig, and the paint can be peeled and removed. Further, since the paint is heated by the ceramic powder, the paint is easily peeled and removed.

Accordingly, the paint can be peeled off without applying an excessive impact to the coating jig, and the coating jig can be prevented from being physically damaged. Also,
Since the ceramic powder is heated by an electric heater, the temperature of the ceramic powder can be set to a temperature lower than the temperature at which the coating jig glows red. Therefore, it is possible to prevent the coating jig from being damaged by heat. Further, since no chemicals are used for peeling the paint, chemical damage (deterioration) of the coating jig can be prevented.

In the method for removing paint according to the present invention, in order to bring the ceramic powder into a fluid state,
Fluidizing air is always supplied into the fluidized bed. For this reason,
The peeling of the paint is always performed in an atmosphere in which oxygen is present, and therefore, the exhaust gas containing the peel paint is in a state of sufficiently containing oxygen. For this reason, abnormal combustion due to lack of oxygen in the electrothermal exhaust combustion device can be prevented.

In the paint peeling method according to the present invention, the heating of the ceramic powder and the combustion of the exhaust gas are performed using electric heat. Further, no combustion gas is introduced into the fluidized bed. For this reason, a fire is unlikely to occur, and there is no danger of leakage of a combustion gas, explosion, or poisoning, and safety is achieved. Since no chemicals are used, there is no troublesome and dangerous work such as waste liquid treatment.

As described above, according to the present invention, it is possible to provide a safe paint removing method without fear of damaging the coating jig.

It should be noted that, in the paint peeling method of the present invention,
Since the release paint may contain substances having low ignition point and low boiling point (such as hydrocarbon compounds), these substances are heated by the ceramic powder, and the burning phenomenon of these release paints inside the fluidized bed. May occur. The coating jig includes a coating jig for spray coating, a coating jig for electrostatic coating, and the like.

Next, as in the second aspect of the present invention, the temperature of the ceramic powder in the fluidized bed is 200 to 60.
Preferably it is 0 ° C. As a result, at the optimal temperature according to the type and material of each paint and coating jig,
The paint can be peeled off. When the temperature is 20
If the temperature is lower than 0 ° C., the paint may not be sufficiently removed. On the other hand, when the temperature exceeds 600 ° C., the coating jig may be damaged by heat.

Next, as in the third aspect of the present invention, it is preferable that the flue gas from the electrothermal exhaust combustion device is introduced into an adsorption device to adsorb and remove harmful substances in the flue gas. This makes it possible to remove harmful substances that have not been burned and decomposed in the electrothermal exhaust combustion device, and to perform harmless exhaust that does not pollute the environment.

Further, the present invention comprises a main unit and an electrothermal exhaust combustion device connected to an exhaust port of the main unit. The main unit is provided with a coating jig to which paint is adhered and a fluid jig for forming a fluidized bed. A processing tank for holding the ceramic powder, a wire mesh floor disposed at the bottom of the processing tank, and a lower tank disposed below the wire mesh floor for heating the ceramic powder; An electrothermal paint peeling device comprising an air inlet for use and an electric heater.

In the electrothermal paint stripping apparatus according to the present invention, similarly to the first aspect, it is possible to prevent the coating jig from being physically damaged, damaged by heat, and chemically damaged (altered). it can. Further, in order to bring the ceramic powder into a flowing state, flowing air is always supplied into the processing tank. Therefore, the paint is always stripped and removed in an atmosphere in which oxygen is present, so that the exhaust gas contains oxygen sufficiently. For this reason, abnormal combustion due to lack of oxygen in the electrothermal exhaust combustion device can be prevented.

Further, the paint removing apparatus according to the present invention is of an electrothermal type, and does not introduce a combustion gas into the fluidized bed. For this reason, as mentioned above, it is safe. In addition, since it is an electric heating type, it automatically starts using a timer, etc.
Automatic operation is possible. Further, the paint peeling device according to the present invention can be operated only with electric equipment. Therefore, installation and transfer of the device are easy. Since no chemicals are used, there is no troublesome and dangerous work such as waste liquid treatment. As described above, the device according to the present invention is easy to operate.

As described above, it is possible to provide an electrothermal paint peeling apparatus which is free from the possibility of damaging the coating jig, is safe, and is easy to operate.

Next, it is preferable that the electrothermal exhaust combustion device is connected to an adsorption device for adsorbing and removing harmful substances contained in the combustion exhaust gas. Thus, harmless exhaust without environmental pollution can be performed as in the third aspect. The combustion exhaust gas is generated by burning the exhaust gas introduced from the processing tank in the electrothermal exhaust combustion device.

[0035]

BEST MODE FOR CARRYING OUT THE INVENTION

First Embodiment A paint peeling method and an electrothermal paint peeling apparatus according to an embodiment of the present invention will be described with reference to FIGS. That is, the paint 8 is placed in the fluidized bed 32 in which the ceramic powder 320 is brought into a fluidized state by introducing the fluidizing air 160.
The coating jig 8 to which the “0” has adhered is disposed, and the coating 80 attached to the coating jig 8 is heated by the electric heater 121 and peeled off by bringing the ceramic powder 320 in a flowing state into contact therewith. Then, the air 1
Exhaust gas 161 containing 60 and the release coating is introduced into the electrothermal exhaust combustion device 17, and the release coating is burned by electrothermal heating. As described above, the paint 80 is peeled off from the painting jig 8.

Next, the electrothermal paint peeling apparatus 1 according to the present embodiment.
Will be described in detail. As shown in FIGS. 1 to 4, the electrothermal paint peeling device 1 includes a main body device 19 and the main body device 1.
9 and a cover 190 covered on the upper part thereof.
An exhaust port 15 provided at 90 is connected to an electrothermal exhaust combustion device 17.

The main unit 19 comprises a processing tank 3 for holding a coating jig 8 to which a coating material 80 is adhered and a ceramic powder 320 for forming a fluidized bed 32 as shown in FIG. Wire mesh floor 31 and ceramic powder 32 provided below wire mesh floor 31
It consists of a lower tank 2 for heating 0. The lower tank 2 has a flow air inlet 132 and an electric heater 1.
21.

In the electrothermal paint peeling apparatus 1, the processing tank 3 is above the wire mesh floor 31 and the lower tank 2 is below the wire mesh floor 31. The periphery of the processing tank 3 and the lower tank 2 is covered with a heat insulating material (not shown).

As shown in FIGS. 2 and 3, the floor surface 200 of the lower tank 2 is composed of six sections, and ribs 201 for installing a dispersion plate 21 described later are provided between the sections. In each of the above sections, a flow air inlet 132 is provided.
Are provided one by one. The blower 13 is connected to the flow air inlet 132 via an air pipe 131. When the size of the electrothermal paint peeling device 1 is increased, it is necessary to increase the number of sections.

As shown in FIGS. 2 and 3, the flow air inlet 132 is provided with a flow air inlet 132 provided on the floor surface 200 of the lower tank 2 and a wind blowing plate 135 covering an upper portion thereof. And Note that, in FIG.
Reference numeral 33 denotes a support for supporting the wind application plate, and reference numeral 136 denotes a nut for fixing the air application plate to the support.

When the flow air 160 is introduced into the air inlet 132, the rotation speed of the blower 13 is controlled by an inverter to control the flow rate.
This makes it possible to reduce the pressure loss of the flowing air 160 and significantly reduce the load on the blower 13.

As shown in FIGS. 2 and 3, a dispersion plate 21 disposed on the rib 201 is provided above the flowing air inlet 132. The dispersion plate 21 has a large number of air holes 210, and each air hole 210
The structure is such that only 60 passes through and ceramic powder 320 does not.

Next, as shown in FIG. 2 to FIG.
An electric heater 121 of the electric heating device 12 is provided. The terminals of the electric heater 121 are covered with a cover 122,
It is fixed to the side surface of the main body device 19. Reference numeral 123 denotes a flange for attachment to the main body device 19;
4 is a fixing bolt.

Further, as shown in FIG.
2 is a power supply 120, a thermocouple 125, a temperature controller 126,
And a thyristor 127. These are mutually connected by the electric signal circuit 129. In addition, the thermocouple 1
25 is arranged in the ceramic powder 320 filled in the processing tank 3. The above ceramic powder 3
20 is a powder made of an alumina material having an average particle diameter of 300 μm, and the temperature in the fluidized bed 32 is maintained at about 550 ° C.

The ceramic powder 320 is heated by the heat generating portion 121 in the space between the dispersion plate 21 and the wire mesh floor 31 in the lower tank 2.

As shown in FIGS. 1 to 3, a wire mesh floor 31 is provided above the electric heater 121. The wire mesh floor 31 is fixed to a rib 301 provided in the processing tank 3. As shown in FIGS. 1 and 3, the coating jig 8 is disposed on the wire mesh floor 31, where the paint 80 is peeled and removed. The wire mesh floor 31
Above this is the processing tank 3, which is filled with ceramic powder 320. The wire mesh floor 31 is
As shown in FIG. 2, a wire mesh 312 is stretched on a frame 311 and provided for placing a coating jig 8.

As shown in FIGS. 1 and 4, the upper part of the processing tank 3 is closed by a lid 190. The lid 190 is provided to be openable and closable by an air cylinder (not shown). The cover 190 is provided with an exhaust port 15, and the electrothermal exhaust combustion device 17 is connected via a flexible hose 152. The exhaust port 15 is provided with an exhaust fan 151.

Further, as shown in FIG. 1, the adsorption device 1 is connected to the electrothermal exhaust combustion device 17 through a connecting pipe 153.
8 is connected, and the adsorption device 18 is provided with a chimney 154 opened to the atmosphere.

As shown in FIG. 1 and FIG. 5, the electrothermal exhaust combustion device 17 is formed by connecting two refractory pipes 173 and 175 in which heating wires 171 are arranged in a lattice shape by a conduit 174. . Note that reference numeral 179 in FIG.
172 is an inlet side conduit, and 176 is an outlet side conduit. The adsorbing device 18 includes a honeycomb carrier 180 supporting an adsorbent.

Next, a method of removing paint according to this embodiment will be described. First, as shown in FIGS. 1 and 3, the coating jig 8 having the paint 80 adhered to the wire mesh floor 31 of the processing tank 3.
Place. Further, the ceramic powder 320 is put into the processing tank 3. Next, the flowing air 160 is introduced from the compressor 13 into the lower tank 2 and the electric heater 121 is energized. The flowing air 160
Is connected through the air pipe 131 to the air inlet 1 for flow.
32 and is introduced into the lower tank 2. At this time, the flowing air 160 hits the blast plate 135 and is introduced to diffuse in a wider range.

Then, the air 160 passes through the air holes 210 of the dispersion plate 21 and reaches the vicinity of the electric heater 121. Here, the ceramic powder 320 heated by the electric heater 121 is moved from the lower part of the processing tank 3 upward, further downward, and again upward as shown by the arrow in FIG. And a fluidized bed 32 is formed. The friction generated between the ceramic powder 320 in the flowing state and the heated state and the coating jig 8 removes and removes the paint 80 (see FIG. 6) adhered to the coating jig 8.

The thermocouple 1 is provided in the fluidized bed 32.
25 is arranged and constantly measures the temperature of the fluidized bed 32. When the thermocouple 125 detects that the fluidized bed 32 has deviated from a predetermined temperature, the electric signal circuit 1
Through 29, an electric signal is sent to the temperature controller 126. In response to this, the temperature controller 126 sends an electric signal to the thyristor 127 to decrease or increase the power supply from the power supply 127 to the electric heater 121 and decrease or increase the temperature of the electric heater 121. As a result, the temperature of the fluidized bed 32 is kept substantially constant.

After that, the flowing air 160 becomes an exhaust gas 161 containing the release coating removed by the coating jig 8. The exhaust gas 161 is supplied to the lid 190.
The air is sucked by the exhaust fan 151 provided at the exhaust port 15 and is drawn out to the exhaust port 15. The exhaust gas 161 is supplied to the flexible hose 152 from the exhaust port 15.
, And reaches the above-mentioned electrothermal exhaust combustion device 17.

As shown in FIG. 5, the exhaust gas is 161
Is heated and burned by the heating wire 171 of the electrothermal exhaust device 17 to become a combustion exhaust gas 162. The heating is performed under the conditions of a temperature of 850 ° C. or more and a time of 1 second or more. Then, the combustion exhaust gas 162 reaches the adsorption device 18 via a connecting pipe 153 provided downstream of the flow of the exhaust gas of the electrothermal exhaust device 17.

Here, harmful components (mainly pigment components such as cadmium and lead contained in the paint) in the flue gas 162 are removed by adsorption.
62 is harmless waste gas 163. Thereafter, the waste gas 163 is supplied to the chimney 15 connected to the adsorption device 18.
From 4 it is discarded into the atmosphere.

Next, the operation and effect of this embodiment will be described. In the present embodiment, the flowing air 160 is
The ceramic powder 320 heated by 21 is brought into a fluidized state, and a fluidized bed 32 is formed. For this reason, the ceramic powder 320 which is in a flowing state and in a heated state.
And the surface of the coating jig 8 comes into contact with the coating 80
Is heated and burned, and friction is generated.
Can be peeled off.

Therefore, the paint can be peeled off without applying an excessive impact to the coating jig 8, and the coating jig 8 can be prevented from being physically damaged. In addition, the heating of the ceramic powder 320 is performed by an electric heating device 12 having a thermocouple and a temperature controller 126 provided in the fluidized bed 32.
Therefore, the temperature of the ceramic powder 320 can be set to a temperature lower than the temperature at which the coating jig 8 becomes red hot. Therefore, the coating jig 8 can be prevented from being damaged by heat. Further, the paint 8
Since no chemicals are used for peeling 0, chemical damage (deterioration) of the coating jig 8 can be prevented.

Further, in the electrothermal paint stripping apparatus 1 of this embodiment, flowing air 160 is always supplied to the lower tank 2 in order to make the ceramic powder 320 flow. Therefore, the paint 80 is always stripped and removed in an atmosphere in which oxygen is present, and therefore, the exhaust gas 161 contains oxygen sufficiently. Therefore, abnormal combustion due to lack of oxygen in the electrothermal exhaust combustion device 17 can be prevented.

In this embodiment, the heating of the ceramic powder 320 and the combustion of the exhaust gas 161 are performed using electric heat. For this reason, a fire is unlikely to occur and it is safe. Furthermore, since it is an electrothermal type, the electrothermal type paint peeling device 1 can be automatically started and operated using a timer or the like. Furthermore, it can be operated only with electric equipment. Therefore, installation and transfer of the device are easy. As described above, the device according to the present example is easy to operate.

Embodiment 2 In this embodiment, the paint peeling of a coating jig using the electrothermal paint peeling device shown in Embodiment 1 will be described. First, the coating jig used for the paint peeling is a coating hanger used for spray coating. The enamel-based paint with a thickness of 4 mm adheres to an SS (rolled steel for general structure) round bar having a diameter of 8 mm. It is in the state where it is. In addition, in the paint peeling operation of this example, the above-mentioned painting jig is used for about 10 c.
m.

The temperature of the fluidized bed in the paint peeling apparatus of this embodiment is maintained in the range of 530 to 580 ° C. According to a preliminary experiment, the enamel-based paint was heated at a temperature of 500.
It was found that it was difficult to burn at a temperature lower than ℃, but it burned sufficiently at a temperature around 550 ° C. Also, at a temperature of 550 ° C., it was found that the SS constituting the coating jig did not glow red.

Next, the above-mentioned coating jig was put into the processing tank of the electrothermal paint peeling apparatus shown in the first embodiment, and the apparatus was operated as shown in the first embodiment to perform the paint peeling operation. . The smoke is generated from the chimney during a period of 5 to 6 minutes into the processing tank. When the generation of the smoke ceased, the coating jig was taken out. As a result, the paint attached to the jig was burned and turned white, but some unburned residue was confirmed.

When the coating jig was taken out 10 minutes after being put into the processing tank, the applied paint was completely burned out. At the time when the coating jig was taken out of the processing tank, the coating jig was not glowing.

Note that white ash was attached to the coating jig taken out of the processing tank, and this ash could be removed by tapping the hanger lightly. Also, the coating jig to which the ash adhered could be removed by placing the coating jig in water. Further, when the coating jig to which the ash was adhered was applied to an ultrasonic cleaner, the ash was completely removed by washing for about 5 seconds.

As described above, it was found that the electrothermal paint peeling device according to the first embodiment can peel paint at a temperature at which the coating jig is not glowed. For this reason, it has become possible to significantly reduce the damage of the coating jig as compared with the conventional paint peeling by direct fire (the above-mentioned gas-fired paint peeling device).

In particular, the electrothermal paint removing apparatus according to the first embodiment can easily remove the paint in a short time with respect to the acrylic paint. Further, in the electrothermal paint peeling apparatus according to the first embodiment, since the heating of the coating jig is performed by the fluidized bed made of the ceramic powder, the ceramic powder wraps around the details of the coating jig, and the coating jig is locally heated. This can prevent the temperature of the coating jig from rising.

[0067]

As described above, according to the present invention, it is possible to provide a paint peeling method and an electrothermal paint peeling apparatus which are safe and easy to operate without any risk of damaging a coating jig. Can be.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing a configuration of an electrothermal paint removing apparatus according to a first embodiment.

FIG. 2 is an explanatory plan view of an electrothermal paint remover according to the first embodiment.

FIG. 3 is a partially cutaway cross-sectional view of the electrothermal paint removing apparatus according to the first embodiment.

4A is a plan view, FIG. 4B is a partially cutaway sectional view, and FIG. 4C is a left side view of the electrothermal paint peeling apparatus according to the first embodiment.

FIG. 5 is an explanatory cross-sectional view of the electrothermal exhaust combustion device according to the first embodiment.

FIG. 6 is an explanatory view of a coating jig according to the first embodiment.

[Explanation of symbols]

 1. . . Electrothermal paint remover, 132. . . Air inlet for flow, 121. . . 14. Electric heater, . . Exhaust port, 161. . . Exhaust gas, 17. . . 17. electrothermal waste combustion equipment, . . Adsorption device, 19. . . Main unit, 2. . . Lower tank, 3. . . Processing tank, 31. . . Wire mesh floor, 32. . . Fluidized bed, 320. . . Ceramic powder,

Claims (5)

[Claims] 1. A coating jig to which a coating material has adhered is disposed in a fluidized bed in which the ceramic powder is made to flow by introducing air for flow, and the coating material which has adhered to the coating jig is electrically heated. The ceramic powder in a fluidized state heated by a heater is peeled off by contact with the ceramic powder, and an exhaust gas containing the flowing air and the peeling paint is introduced into an electrothermal exhaust combustion device to remove the peeling paint. A paint peeling method characterized by burning by electric heating. 2. The method according to claim 1, wherein the temperature of the ceramic powder in the fluidized bed is 200 to 600 ° C. 3. The paint stripping method according to claim 1, wherein the exhaust gas from the electrothermal exhaust combustion device is introduced into an adsorption device to adsorb and remove harmful substances in the exhaust gas. 4. A main unit and an electrothermal exhaust combustion device connected to an exhaust port of the main unit. The main unit receives a coating jig to which paint is adhered and ceramic powder for forming a fluidized bed. A processing tank, a wire mesh floor provided at the bottom of the processing tank, and a lower tank provided below the wire mesh floor for heating the ceramic powder, wherein the lower tank is provided with a flow air inlet; An electrothermal paint peeling device comprising: an electrothermal paint heater. 5. The electrothermal paint peeling device according to claim 4, wherein the electrothermal exhaust combustion device is connected to an adsorption device for adsorbing and removing harmful substances contained in the combustion exhaust gas.