JP2015134306A - Cooling type component removal cyclone device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve such a problem that, when oil vapor is introduced into a conventional cooling type cyclone device as it is, the cyclone device cannot change particulate oil vapor into such a particle size as to receive sufficient centrifugal force for efficient separation recovery because a water-cooling jacket attached to the outer circumference of the cyclone device has a limited cooling effect, and cannot satisfactorily recover an oil component.SOLUTION: A cooling type component removal cyclone device which liquefies and extracts a component contained in gas by cooling the gas to remove the component from the gas includes: a cyclone main body; a cooling part for cooling an inner wall surface of the cyclone main body; a gas introduction part; a recovery part for removing and recovering a liquefied component which is cooled on the inner wall surface and is liquefied from the gas; a gas temperature control part for controlling gas introduced from the gas introduction part to a predetermined temperature or less; and a removed gas discharge part for discharging removed gas from which the liquefied component is removed.

Description

  The present invention relates to a cooling type component removal cyclone apparatus for separating and removing an oil component and a resin component from a gas by cooling a gas containing an oil component and a resin component discharged from a varnish heat curing furnace and the like.

  In the manufacturing process of an electric motor or the like, a varnish impregnation process for insulating the coil is performed. In the varnish impregnation treatment, the coil is impregnated into the varnish, and the varnish is cured by drying or heating. Such drying or heating is performed in a varnish heating and curing furnace, and the gas discharged from the furnace at that time includes a vaporized dry oil or resin that is a component of the varnish. Release of such gas containing oil or resin into the atmosphere may adversely affect the surrounding environment or cause a fire. Therefore, it is desired to remove oil components and resin components in the exhaust gas.

  For example, in the description of Patent Document 1, oil vapor generated by pulverizing waste plastic waste by pyrolysis is introduced into a cyclone device with a water cooling jacket, and the oil vapor is cooled and liquefied. Is disclosed.

JP 2009-96966 A

  The cyclone device is a device that applies a centrifuge and is used for gas-liquid separation and gas-solid separation. The gas introduced from the upper tangential direction of the cylindrical cyclone body swirls within the cyclone body, turns into an upward flow at the lower part of the cyclone body, and is discharged from the upper part of the cyclone body. At this time, while the gas is discharged above the main body, the solid or liquid contained in the gas collides with the inner wall surface of the main body due to centrifugal force and falls due to gravity. In this way, the solid in the gas is separated and recovered.

However, in order for a liquid or solid to receive sufficient centrifugal force to be separated from the gas, a corresponding size is required. According to the knowledge of the present inventor, oil particles such as varnish need to have a particle size of approximately 3 μm. By the way, for example, an oil component and a resin component contained in a gas discharged from a varnish heat curing furnace are present as liquid fine particles having a particle size of approximately 1 μm or less . Therefore, in order to efficiently separate and recover such oil components and resin components, it is necessary to cool the gas until the flow diameter reaches about 3 μm.

  However, when the oil vapor is directly introduced into the cyclone apparatus as in the aggregator disclosed in Patent Document 1, the cooling action is not sufficient even if a water cooling jacket for cooling is attached to the outer periphery of the cyclone apparatus. Therefore, the particle size is not enough to receive a centrifugal force sufficient to separate and recover, and the oil component cannot be recovered sufficiently.

  In order to solve the above problems, the present invention provides the following cooling type component removal cyclone apparatus and the like. That is, it is a cooling type component removal cyclone device that liquefies and extracts components contained in gas by cooling the gas and removes them from the gas, and a cooling unit that cools the cyclone main body and the inner wall surface of the cyclone main body A gas introduction unit, a recovery unit that removes and recovers the liquefied component liquefied by being cooled at the inner wall surface, and a gas temperature control unit that controls the gas introduced from the gas introduction unit to a predetermined temperature or less And a post-removal gas discharge unit that discharges the post-removal gas from which the liquefied component has been removed.

  In addition, the gas temperature control unit having the above-described configuration provides a cooling type component removal cyclone apparatus having a gas mixing unit that mixes a relatively low temperature gas with a gas introduced from the gas introduction unit. In addition, the cooling unit provides a cooling type component removal cyclone device having an opposed channel means for flowing a refrigerant so as to face a gas flow in the cyclone. Moreover, the cooling type | mold component removal cyclone apparatus provided with either of the said structures and the gas inlet of the said gas introduction part is in a position higher than the gas outlet of the said post-removal gas discharge part is provided. In addition, there is provided a cooling type component removing cyclone apparatus having any one of the above-described configurations, wherein the recovery unit is located at a lower end of the truncated cone-shaped cylinder of the cyclone main body and is not cooled by the cooling unit.

  Moreover, the cooling type | mold component removal cyclone apparatus which is provided with one of the said structures and whose gas introduce | transduced from the said gas introduction part is gas discharged | emitted from a varnish heat curing furnace is provided. The post-removal gas discharge unit provides a cooling type component removal cyclone apparatus having post-removal gas delivery means for delivering the post-removal gas to the varnish heating and curing furnace.

  According to the present invention, it is possible to provide a cooling type component removal cyclone apparatus that can efficiently recover an oil component and a resin component contained in a gas.

The conceptual diagram which shows an example of the cooling type component removal cyclone apparatus of Embodiment 1. Conceptual diagram showing how gas is introduced into and discharged from the cyclone body Conceptual diagram showing an example of a cooling unit provided with a spiral slope on the inner wall surface of the jacket Schematic showing an example of a cooling unit attached to the cyclone body The conceptual diagram which shows an example of the cooling type component removal cyclone apparatus of Embodiment 2.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In addition, this invention should not be limited to these embodiments at all, and can be implemented in various modes without departing from the gist thereof.

The first embodiment mainly relates to claims 1 to 6 and the like. The second embodiment mainly relates to claims 6 and 7.
<Embodiment 1>
<Summary of Embodiment 1>

The cooling type component removal cyclone apparatus according to the present embodiment improves the efficiency of liquefaction by cooling the gas introduced into the cyclone main body to a predetermined temperature or less, thereby cooling the inner wall surface of the cyclone main body and extending the liquefaction efficiency. Thus, the recovery efficiency of the liquefied component can be improved.
<Configuration of Embodiment 1>

  FIG. 1 is a conceptual diagram illustrating an example of a cooling type component removal cyclone apparatus according to the present embodiment. As shown in the figure, the cooling-type component removal cyclone apparatus has a “cyclone main body” (0101), a “cooling section” (0102), a “gas introduction section” (0103), and a “recovery section” (0104) as main components. ), “Gas temperature control section” (0105), and “post-removal gas discharge section” (0106).

  The cooling type component removal cyclone apparatus of this embodiment liquefies and extracts the component contained in gas by cooling gas, and removes it from gas. “A component contained in a gas” refers to a gas or liquid particle. The liquid particles are, for example, particulate liquid oil dispersed in a gas such as oil mist. Further, “liquefy” means to change the phase of a gas to a liquid or to condense a particulate liquid. By condensing, the particulate liquid increases in weight and receives more centrifugal force due to the swirling flow of gas, thereby improving the centrifugal separation efficiency.

  The “cyclone main body” (0101) has a cylindrical shape, and a lower portion is a cylindrical body having a truncated cone shape. The material for forming the cyclone body is not particularly limited, and a material employed in a known cyclone device may be used. For example, a metal having high thermal conductivity can be used. In addition, in order to improve the cooling effect by the cooling part mentioned later, in order to increase the surface area of a cyclone main body, you may provide a fin and a pin in the surface.

  The “gas introduction part” (0103) is provided to introduce gas into the cyclone main body, and is provided so that the gas can circulate in the tangential direction of the cross-sectional circle of the cyclone main body. The gas introduced from the gas introduction part swirls in the cyclone body, and the solid or liquid contained in the gas is collected by a “recovery part” (0104) provided at the lower end of the cyclone body by the action of centrifugal separation. The gas is finally discharged out of the cyclone main body from the “post-removal gas discharge portion” (0106). The gas is distributed by a “fan” (0107) or the like.

  Here, the flow of the gas in the cyclone body and the separation and recovery of the solid or liquid in the gas will be described with reference to FIG. FIG. 2 is a conceptual diagram showing a mode in which gas is introduced into and discharged from the cyclone body. As shown in the figure, a “gas introduction part” (0202) is provided on the upper part of the “cyclone body” (0201). The gas introduced from the gas introduction part circulates around the inner wall of the cyclone main body as indicated by the broken arrow. Then, the swirl flow of the gas turns into an upward flow at the lower part of the cyclone main body having a conical shape, and is discharged out of the cyclone main body from the “post-removal gas discharge portion” (0203).

  The post-removal gas discharge portion has a cylindrical body as shown in the figure, and is arranged so that the cylindrical body and the cylindrical body of the cyclone main body are coaxial. Further, the lower end of the cylindrical body of the post-removal gas discharge unit is configured to be at a position lower than the gas inlet. With this configuration, the introduced gas is swirled in the cyclone body without being immediately discharged.

  The “cooling part” (0102) cools the inner wall surface of the cyclone body. Water, oil, air, or the like can be used as the heat medium for cooling. As a cooling mode, the heat medium may be configured to circulate while contacting the outer wall surface of the cyclone body. For example, as shown in FIG. 1, a jacket (covering material) for covering the outer wall surface of the cyclone body is provided. And water as a heat medium is circulated in the space between the jacket and the outer wall surface of the cyclone body. The jacket is provided with a “heat medium introduction port” (0108) and a “heat medium discharge port” (0109) for circulating a heat medium such as water, and a heat medium such as water is circulated by a pump or the like.

  In FIG. 1, a water inlet is provided below the jacket and a water outlet is provided above the jacket, but the positions of the water inlet and the water outlet are appropriately determined according to the direction of water flow. It is also economically preferable to circulate and use the water to be circulated. In this case, in order to lower the temperature of the discharged water, it is preferable from the viewpoint of the cooling effect of the cyclone body that it is circulated to the water inlet after passing through the heat exchanger.

  The cooling unit will be further described with reference to FIG. FIG. 3 is a conceptual diagram showing a cooling unit in which a spiral slope is provided on the inner wall surface of the jacket. As shown in the drawing, “slopes” (0302, 0303) that spirally rise from the lower end of the “jacket” (0301) are provided. By covering this jacket on the outer periphery of the cyclone body, a heat medium flow path closed by the inside of the jacket and the outer wall surface of the cyclone body is formed. This slope is temporarily provided on the jacket, and the jacket is covered with the cyclone body to form the flow path. The channel may be formed by covering a body jacket. Further, a slope may be provided on each of the inner wall surface of the jacket and the outer wall surface of the cyclone main body, and a flow path may be formed when the slope is covered.

  FIG. 4 is a conceptual diagram showing a mode in which the jacket shown in FIG. 3 is attached to the cyclone main body shown in FIG. 2, and a side view and a top view are shown. As shown in the drawing, the “gas” (0404) introduced from the “gas introduction part” (0403) turns clockwise on the inner wall surface of the “cyclone main body” (0401) as viewed from above. On the other hand, the “jacket” (0402) has a “heat medium inlet” (0405) in the lower part and a “heat medium outlet” (0407) in the upper part, and “water” (0406) introduced as a heat medium. ) Circulates by turning the slope counterclockwise when viewed from above. By comprising in this way, the flow of gas and the flow of water will face each other. In this case, the heat exchange efficiency between the gas and water is good, and the gas cooling effect is excellent. When the gas is cooled, the components contained in the gas are liquefied, and the liquefied components are more strongly subjected to centrifugal force, collide with the inner wall surface of the cyclone main body, and fall by gravity to be recovered.

  Moreover, you may provide a cooling part inside a cyclone main body other than the aspect embodied as a jacket which coat | covers the outer side of a cyclone main body as mentioned above. For example, a tubular flow channel for circulating the heat medium is arranged from the bottom to the top of the cyclone main body so as to draw a spiral on the inner wall surface of the cyclone main body, and a heat medium such as water is circulated through the tubular flow channel. Further, the tubular channel may be arranged so as to cover all of the inner wall surface of the cyclone main body, or may be arranged so that a part of the cyclone main body is exposed. The components in the gas are cooled and liquefied and dropped on the surface of the tubular flow path or the exposed inner wall surface of the cyclone body, and collected. By providing the cooling part on the inner wall side of the cyclone main body in this way, the surface area inside the cyclone main body (including the surface of the tubular flow path) can be increased, thereby improving the cooling effect and extending in the gas. This can contribute to an improvement in the recovery efficiency of the components.

  Again, the gas temperature control unit will be described with reference to FIG. The “gas temperature control unit” (0105) controls the gas introduced from the gas introduction unit to a predetermined temperature or lower. The figure shows a mode in which the temperature of the gas introduced from the gas introduction unit is controlled by mixing outside air with the exhaust gas.

  As shown in the figure, for example, a “first valve” (0111) for adjusting the flow rate of the gas discharged from the “varnish heat curing furnace” (0110), and a flow for conducting the gas from the varnish heat curing furnace to the cyclone body. A “second valve” (0112) for adjusting the flow rate of the outside air introduced into the pipe and a “temperature detector” (0113) for detecting the temperature of the gas introduced into the gas introduction unit are provided. Here, a mechanism configured by the first valve, the second valve, and the like, which mixes a relatively low temperature gas such as the outside air with the gas introduced from the gas introduction unit is referred to as “gas mixing means”. Note that the first valve is not an essential configuration and may not be provided.

  The temperature of the gas discharged from the exemplified varnish heat curing furnace often exceeds 100 ° C. On the other hand, the outside air rarely exceeds 100 ° C. Therefore, the temperature of the gas introduced into the gas introduction part is lowered by mixing outside air that is relatively cooler than the temperature of the gas discharged from the varnish heat curing furnace. The cooling for lowering the temperature is not limited to the above-described mixing of the outside air, but may be performed by cooling a flow pipe through which a gas discharged from a varnish heat curing furnace or the like flows. Cooling of the flow pipe or the like may be performed by either air cooling or water cooling, and for example, a heat exchanger or the like can be used.

  In the gas temperature control, the temperature of the gas detected by the temperature detector is fed back, the amount of outside air introduced is adjusted, and the temperature is lowered to the target temperature. Such control is realized by various arithmetic processes based on the CPU, RAM, and programs executed by them. Note that this case is based on the premise that the temperature of the gas discharged from the varnish heat curing furnace generally exceeds 100 ° C., and the temperature of the outside air is relatively lower than the gas temperature. . That is, it is only necessary that the temperature of the gas introduced into the gas introduction unit can be reduced by mixing a gas having a temperature relatively lower than the temperature of the gas discharged from any device.

  The gas temperature may be detected directly or indirectly by detecting the gas temperature. In the former case, for example, the temperature can be detected by providing a temperature detector inside the gas introduction part or the flow pipe connected to the gas introduction part. In the latter case, the temperature may be detected by detecting the temperature of the gas introduction part or the outer surface of the flow pipe connected to the gas introduction part and estimating the temperature of the gas from the detected temperature. .

  In addition, as a means for controlling the gas introduced from the gas introduction unit to a predetermined temperature or lower, in addition to the aspect of mixing the outside air, for example, the pipe through which the gas flows is cooled by a heat medium such as water or oil. You may go. When gas is cooled using water as a heat medium, water used in the cooling unit may be used.

  It is preferable to control the temperature of the gas introduced from the gas introduction unit to be approximately 50 ° C. or less. For example, liquid fine particles of oil such as varnish have a particle size of only about 1 μm in a state where the gas temperature exceeds 100 ° C., and even if introduced into the cyclone main body with such a size. It cannot receive sufficient centrifugal force and is not excellent in recovery efficiency. On the other hand, when the temperature is lower than 50 ° C., the particle size of the liquid fine particles is about 3 μm. When it has such a magnitude | size, it will receive sufficient centrifugal force in a cyclone, and the outstanding collection | recovery efficiency can be obtained.

In addition to the varnish heat curing furnace described above, there are many apparatuses for discharging a high-temperature gas containing an oil component and a resin component, such as a rubber secondary vulcanization furnace and a plastic sheet tenter process heating furnace. With respect to the gases discharged from these devices, the cooling type component removal cyclone device of the present embodiment can sufficiently remove the components in the gas.
<Embodiment 1 effect>

By the cooling type component removal cyclone apparatus of this embodiment, the cooling type component removal cyclone apparatus which can collect | recover the oil component and resin component which are contained in gas efficiently can be provided.
<Embodiment 2>
<Overview of Embodiment 2>

The cooling type component removal cyclone apparatus of the present embodiment is based on the first embodiment, and is characterized in that the post-removal gas discharged from the post-removal gas discharge unit is sent again to the varnish heat curing furnace.
<Embodiment 2 configuration>

  FIG. 5 is a conceptual diagram showing an example of the cooling type component removal cyclone apparatus of the present embodiment. As shown in the figure, the main component of the cooling type component removal cyclone device, such as “Cyclone body” (0501), “Gas temperature control unit” (0502), is the same as that of the cooling type component removal cyclone device in the first embodiment. The configuration peculiar to the present embodiment is that the post-removal gas exhausted from the “post-removal gas discharge section” (0503) is sent to the “varnish heating and curing furnace section” (0505) to be refluxed.

  The varnish heating and curing furnace introduces a gas such as outside air, heats it with a heater provided outside the furnace, and sends it into the furnace by a circulation fan to make the inside of the furnace a high temperature atmosphere. A part of the gas in the furnace is discharged so as not to exceed the upper limit of the oil smoke concentration, and the other is recirculated to the heater by a circulation fan, heated again, and sent into the furnace.

  The cooling type component removal cyclone apparatus of the present embodiment has a post-removal gas delivery means for sending a post-removal gas having a temperature higher than that of the outside air to the varnish heat curing furnace. In FIG. 5, “fan” (0504) and “third valve” (0506) correspond to the post-removal gas delivery means. The third valve is provided in a flow pipe for circulating the gas after removal between the post-removal gas discharge section and the varnish heat curing furnace, and adjusts the flow rate of the removed gas flowing through this flow pipe. Thus, a part or all of the post-removal gas discharged from the post-removal gas discharge section can be sent to the varnish heat curing furnace. The control of the third valve can be performed in accordance with the temperature of the gas introduced from the gas introduction unit, similarly to the control in the gas temperature control unit of the first embodiment.

  The gas after removal sent to the varnish heat curing furnace is sent into the furnace through a heater by a circulation fan. Since the gas after removal is generally at a relatively higher temperature than the outside air, heating the introduced outside air to heat the inside of the furnace to a high temperature atmosphere is better when heating the gas after removal to make the inside of the furnace a high temperature atmosphere. Less energy is required for heating than in the case of. That is, it can be said that an excellent energy saving effect is exhibited.

In addition, refluxing the gas after removal to the varnish heating and curing furnace allows the component removal process contained in the gas after removal to be repeated in the cyclone apparatus, thereby increasing the component removal rate. . As a result, it is possible to prevent the atmosphere from being contaminated by the removed gas discharged to the outside. The post-removal gas delivery means in this embodiment can be applied not only to a varnish heat curing furnace, but also to a rubber secondary vulcanization furnace, a plastic sheet tenter process heating furnace, and the like, as in the first embodiment.
<Embodiment 2 effect>

  With the cooling type component removal cyclone apparatus of this embodiment, it becomes possible to reduce the air pollution risk by improving the energy saving effect and the component removal rate by reusing the gas after removal.

0101 Cyclone body 0102 Cooling unit 0103 Gas introduction unit 0104 Recovery unit 0105 Gas temperature control unit 0106 Gas removal unit after removal 0107 Fan 0108 Heat medium introduction port 0109 Heat medium discharge port 0110 Varnish heat curing furnace 0111 First valve 0112 Second Valve 0113 Temperature detector

Claims (7)

It is a cooling type component removal cyclone device that liquefies and extracts components contained in a gas by cooling the gas and removes it from the gas,
The cyclone body,
A cooling section for cooling the inner wall surface of the cyclone body;
A gas introduction part;
A recovery unit that removes and recovers the liquefied component liquefied by being cooled on the inner wall surface from the gas;
A gas temperature control unit for controlling the gas introduced from the gas introduction unit to a predetermined temperature or lower;
A post-removal gas discharge unit for discharging the post-removal gas from which the liquefied component has been removed;
Cooling type component removal cyclone device consisting of   The cooling type component removal cyclone apparatus according to claim 1, wherein the gas temperature control unit includes a gas mixing unit that mixes a relatively low temperature gas with a gas introduced from the gas introduction unit.   The cooling-type component removal cyclone device according to any one of claims 1 to 3, wherein the cooling unit includes an opposed channel unit that allows a refrigerant to flow so as to face a gas flow in the cyclone.   The cooling-type component removal cyclone apparatus as described in any one of Claim 1 to 4 which the gas inlet of the said gas introduction part exists in a position higher than the gas outlet of the said post-removal gas discharge part.   The cooling type component removal cyclone device according to any one of claims 1 to 4, wherein the recovery unit is located at a lower end of the truncated cone-shaped cylinder of the cyclone body and is not cooled by the cooling unit.   The cooling type component removal cyclone apparatus according to any one of claims 1 to 5, wherein the gas introduced from the gas introduction unit is a gas discharged from a varnish heat curing furnace.   The cooling-type component removal cyclone apparatus according to claim 6, wherein the post-removal gas discharge unit includes a post-removal gas delivery unit that delivers the post-removal gas to the varnish heating and curing furnace.

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