JP2017067324A - Dryer and dry system including the same - Google Patents

Abstract

A drying apparatus capable of effectively drying powdered or granular material and a drying system having the same are provided. A drying apparatus (1) has a storage section (10) for storing powdered or granular material, a suction side connected to an exhaust line (14) connected to an exhaust side of the storage section, and an air supply side of the storage section. A gas circulation source 17 whose discharge side is connected to a connected air supply line 16, and a gas circulation source 17 which is incorporated in the air supply line and separates the gas for drying the granular material from the gas passing through the air supply line and downstream and a separation membrane 25 that delivers to the side. [Selection drawing] Fig. 1

Description

  The present invention relates to a drying device for drying a granular material and a drying system provided with the drying device.

Conventionally, a drying apparatus for drying a granular material is known. As such a drying device, there is known a device that dries by supplying outside air heated by a heater into a hopper that stores granular material, but the outside air contains moisture and oxygen. Therefore, it is considered that moisture and oxygen in the outside air are easily adsorbed on the surface of the granular material and the like, and defective molding or deterioration due to oxidation is likely to occur in the subsequent molding process.
For example, in Patent Document 1 below, a hot air circulation circuit in which a blower that circulates a circulating gas from a hopper dryer is arranged, a nitrogen generator that injects nitrogen generated on the air supply side of the blower, and surplus by mixing nitrogen. A drying device provided with an exhaust port for exhausting the circulated gas is disclosed.

JP 2000-263549 A

  However, in the drying apparatus described in Patent Document 1, nitrogen is generated from compressed air taken in through a compressed air inlet in a nitrogen generator, and the generated gas is mixed with the circulating gas. Therefore, in order to increase the concentration of nitrogen in the circulating gas, a large amount of compressed air is required or a large nitrogen generator is required, and the concentration is further limited by the performance of the nitrogen generator. Is desired.

  This invention is made | formed in view of the said situation, and it aims at providing the drying apparatus which can dry a granular material material effectively, and a drying system provided with the same.

  In order to achieve the above object, the drying apparatus according to the present invention includes a storage unit that stores a granular material, and an exhaust line connected to an exhaust side of the storage unit, while the suction side is connected to the storage unit. A gas circulation source whose discharge side is connected to an air supply line connected to the air supply side, and a gas incorporated in the air supply line to separate the gas for drying the particulate material from the gas passing through the air supply line And a separation membrane that is sent to the downstream side.

In order to achieve the above object, a drying system according to the present invention is provided to branch from a downstream portion of the separation membrane in the air supply line and the drying device according to the present invention, and the storage unit includes And a supply side air supply line communicating with the supply destination of the stored granular material.
In order to achieve the above object, a drying system according to the present invention is provided so as to branch from a downstream portion of the separation membrane in the air supply line and the drying apparatus according to the present invention. And a transport line for pneumatically transporting the granular material to the reservoir.
In order to achieve the above object, a drying system according to the present invention is provided to branch from a downstream portion of the separation membrane in the air supply line and the drying device according to the present invention, and the storage unit includes A supply-side air supply line that communicates with a supply destination of the stored granular material material, and a branch from a downstream portion of the separation membrane in the supply air line. It is characterized by comprising a transport line for pneumatically transporting the granular material, and a switching valve that can be switched to a state in which a drying gas passes through the transport line.

  The drying apparatus and the drying system including the same according to the present invention can effectively dry the granular material by having the above-described configuration.

1 is a schematic system configuration diagram schematically illustrating an example of a drying apparatus according to an embodiment of the present invention and a drying system including the drying apparatus. (A)-(c) is a partially abbreviated schematic system block diagram which shows typically the modification of the air supply line which has arrange | positioned the separation membrane applied to the drying apparatus, respectively. It is a schematic system block diagram which shows typically an example of the drying apparatus which concerns on other embodiment of this invention, and a drying system provided with the same. It is a schematic system block diagram which shows typically an example of the drying apparatus which concerns on further another embodiment of this invention, and a drying system provided with the same. It is a schematic system block diagram which shows typically an example of the drying apparatus which concerns on further another embodiment of this invention, and a drying system provided with the same.

Embodiments of the present invention will be described below with reference to the drawings.
In addition, in FIGS. 1-5, the pipe line (pipe) used as the path | route through which granular material material, gas, etc. pass is typically shown with the continuous line.
FIG. 1 is a diagram schematically illustrating an example of a drying apparatus according to the first embodiment and an example of a drying system including the drying apparatus.

As shown in FIG. 1, the drying device 1 according to the present embodiment has a suction portion connected to a storage portion 10 that stores a granular material and an exhaust line 14 that is connected to an exhaust side of the storage portion 10. The gas circulation source 17 whose discharge side is connected to the air supply line 16 connected to the air supply side of the storage unit 10 and the gas material incorporated in the air supply line 16 from the gas passing through the air supply line 16 And a separation membrane 25 that separates the drying gas and sends it to the downstream side.
The drying system A according to this embodiment is provided so as to branch from the downstream portion of the drying device 1 and the separation membrane 25 in the air supply line 16, and is a supply destination of the granular material stored in the storage unit 10. 2, a supply-side air supply line 33 communicated with 2. Further, the drying system A includes transport lines 34 and 35 that are provided so as to branch from the downstream side portion of the separation membrane 25 in the air supply line 16 and pneumatically transport the granular material from the material source 5 to the storage unit 10. ing. In the present embodiment, the drying system A includes the switching valve 32 that can be switched to a state in which the drying gas passes through the transport lines 34 and 35.

Here, the above-mentioned powder material refers to a powder / granular material, but includes a fine flake shape, a short fiber piece shape, a sliver-like material, and the like.
Moreover, as said material, what kind of materials, such as synthetic resin materials, such as a resin pellet and a resin fiber piece, a metal material, a semiconductor material, a wood material, a chemical material, a food material, may be sufficient.
Moreover, as a granular material, when molding a synthetic resin molded product, for example, a natural material (virgin material), a pulverized material, a master batch material, various additives, and the like can be given. Moreover, it is good also as a structure containing reinforcement fibers, such as glass fiber and carbon fiber.

  For example, the supply destination 2 of the storage unit 10 may be a molding machine such as an injection molding machine. In this embodiment, the example which installed the storage part 10 directly on the molding machine as the supply destination 2 is shown. Moreover, in the example of a figure, the example which connected the lower end part of the storage part 10 to the injection | throwing-in pipe 3 provided on the molding machine as the supply destination 2 is shown. The molding machine as the supplier 2 is not limited to an injection molding machine for molding a synthetic resin molded product, but may be an injection molding machine for other materials, or an extrusion molding machine or a compression molding machine for various materials. It is good also as an aspect which uses other molding machines, such as a supply destination. Further, the supply destination 2 of the storage unit 10 is not limited to a single supply destination, and may be a plurality of supply destinations.

The storage unit 10 includes a hopper main body 11 as a storage unit main body that stores the granular material, a heating unit 13 that heats the drying gas supplied into the hopper main body 11 via the air supply line 16, and a material. And a collection unit 12 that collects the granular material that has been pneumatically transported from the original 5.
For example, the heating unit 13 may have a box shape in which a terminal of the air supply line 16 is connected and a heating element such as a sheathed heater is incorporated. In this case, since the drying gas supplied through the gas circulation source 17 has a high pressure as will be described later, the drying gas supplied into the heating unit 13 through the supply line 16 becomes the heating element. In order to effectively contact, the pipe may be enlarged in diameter, or an enlarged diameter part or the like may be provided on the upstream side of the heating part 13 so as to lower the pressure of the drying gas. Further, the drying gas that has passed through the heating unit 13 is introduced into the hopper body 11 through a vent pipe communicating with the hopper body 11.

  The heating unit 13 is not limited to the box shape as described above, but may be a tubular heating unit in which a linear heating element is built in the longitudinal direction, and other various configurations are adopted. Is possible. A temperature sensor for detecting the temperature of the heated drying gas introduced into the hopper body 11 is provided on the downstream side of the heating unit 13. Based on the temperature detected by the temperature sensor, the energization of the heating element may be controlled so that the heated drying gas has a predetermined temperature.

The hopper main body 11 has a hopper shape in which an upper side portion has a substantially cylindrical shape and a lower side portion has a substantially inverted conical shape.
The lower end portion of the hopper body 11 is connected to the charging pipe 3 provided on the supply destination 2 described above. The charging pipe 3 may be provided on the hopper body 11. In addition, the hopper body 11 and the input port of the supply destination 2 are always in communication with each other, that is, the powder material in the hopper main body 11 is supplied to the supply destination 2 in a so-called dripping manner. It is good. Or it is good also as a structure which provided discharge parts, such as a suitable opening-closing mechanism and a cutting-out part, in the lower end part of the hopper main body 11. FIG.

A flow rate adjusting valve 19 is provided in the air supply line 16 on the upstream side of the heating unit 13 and on the downstream side of the refining unit 20 including the separation membrane 25 described later. The flow rate adjustment valve 19 has a pressure on the upstream side of the flow rate adjustment valve 19 in a predetermined high pressure state, and a granular material stored in the storage unit 10 at a substantially constant flow rate on the downstream side of the flow rate adjustment valve 19. It may be appropriately adjusted so that a drying gas having a flow rate suitable for the drying of the gas flows. The flow rate adjustment valve 19 may be a manually adjustable needle valve (throttle valve) or the like, or may be a flow rate control valve capable of controlling the flow rate adjustment.
Further, the hopper body 11 is provided with an inlet for introducing a drying gas heated in the heating unit 13. In the example shown in the figure, the inlet is provided at the lower end of a vent pipe connected to the downstream side of the heating unit 13 and extending in the vertical direction in the hopper body 11. The drying gas discharged from the introduction port to the lower end portion in the hopper body 11 passes through the granular material layer stored in the hopper body 11 and is exhausted through the exhaust port provided in the upper end portion. Exhaust toward the line 14.

In the example shown in the figure, an exhaust port to which an exhaust line 14 is connected is provided at the upper end portion of the collection portion 12 provided to communicate with the hopper body 11 at the upper end portion of the hopper body 11.
A downstream transport line 35 provided on the downstream side of the discharge portion of the material source 5 is connected to the collection unit 12. In addition, the collection unit 12 is provided with a separation unit that separates the granular material from the transport gas. As such a separation unit, any material can be used as long as it can separate the particulate material and the transport gas, but the particulate material that is the raw material while allowing the dust to pass through in addition to the transport gas. It is good also as what consists of a perforated metal, a net-like (mesh shape) perforated plate-like body, etc. which block | prevent the passage of this. Moreover, it is good also as what was set as the structure which isolate | separates granular material material from transport gas by what is called a cyclone type, without providing such a separation part.
The particulate material collected in the collection unit 12 falls into the hopper body 11 by its own weight and is stored.

  The material source 5 may be a material tank, a weighing hopper that measures the granular material, a blending hopper that mixes a plurality of types of granular material at a predetermined ratio, and the like. Moreover, the temporary storage part provided in the downstream of these various hoppers is good also as the material origin 5. FIG. Moreover, it is not restricted to the aspect which connects the transport lines 34 and 35 to the single material origin 5, and conveys a single granular material toward the storage part 10, and stores different granular material to each. It is good also as an aspect which connected to the several material origin 5, and made it possible to transport several types of granular material toward the storage part 10. FIG.

  The discharge part provided at the lower end of the material base 5 may discharge the particulate material toward the transport lines 34 and 35 in a so-called sluice, but discharge control (operation control or open / close control) It is good also as what was set as the structure which provided the appropriate opening / closing mechanism and cutting part etc. which were possible. As such a discharge section, a slide damper having a valve body moved in a direction orthogonal to the discharge pipe, a push damper having a valve body moved in the axial direction with respect to the discharge pipe, and a rotor are provided. It is good also as a mass feeder provided with the rotary body provided, the screw feeder provided with the screw, the rotary body provided with the recessed part (mass part) which accommodates material in a surrounding surface. Furthermore, the discharge unit may be a weighing mass damper configured to slide and discharge a container (metering mass) whose capacity can be adjusted with respect to the discharge pipe.

  An upstream transport line 34 provided on the upstream side of the discharge portion of the material source 5 is connected to a branch line 30 provided so as to branch from the air supply line 16 via a switching valve 32. In the present embodiment, this switching valve 32 is a three-way switching valve, and in addition to the branch line 30 and the upstream transport line 34, a supply-side air supply line 33 communicated with the supply destination 2 is connected to the switching valve 32. The configuration is as follows. That is, when the switching valve 32 is set to a transport side switching state in which the branch line 30 and the upstream transport line 34 are communicated, the drying gas that has passed through the air supply line 16 passes through the branch line 30 and the upstream transport line 34. After that, air is sent toward the material base 5 side. In this way, when the switching valve 32 is set to the transport side switching state and the discharge portion of the material source 5 is controlled to be discharged, the high pressure gas fed through the upstream side transport line 34 if the discharge state is set. Thus, the particulate material discharged from the material source 5 is pumped (aerodynamic transport) toward the collection unit 12 via the downstream transport line 35. The switching of the switching valve 32 to the transport side switching state may be performed based on a material request signal such as a material sensor provided in the hopper body 11. Moreover, you may make it control suitably the switching valve 32 and the discharge part of the material origin 5 so that a granular material may not stay in the downstream transport line 35. FIG.

On the other hand, if the switching valve 32 is set to a supply side switching state in which the branch line 30 and the supply side supply line 33 are communicated with each other, the drying gas passing through the supply line 16 is supplied to the branch line 30 and the supply side supply line. Air is supplied toward the supply destination 2 via the air line 33. In the present embodiment, the supply side air supply line 33 is connected to the input pipe 3. In addition, when the gas circulation source 17 is activated, it is good also as an aspect which supplies the gas to the supply destination 2 by making the switching valve 32 into a supply destination side switching state except at the time of material transport. Moreover, it may replace with the aspect which used the switching valve 32 as the three-way switching valve, and you may make it comprise with two on-off valves.
The branch line 30 is provided with a flow rate adjusting valve 31 similar to the above. As in the above, the flow rate adjusting valve 31 has a pressure on the upstream side of the flow rate adjusting valve 31 in a substantially predetermined high pressure state, and is substantially constant at the downstream side of the flow rate adjusting valve 31 and is suitable for transporting the granular material. The flow rate may be adjusted as appropriate so that a gas having a high flow rate flows.

The exhaust line 14 connected to the exhaust side of the collection unit 12 is provided with a filter 15 that captures dust separated in material transportation, dust contained in exhaust from the hopper body 11, and the like. In addition, on the upstream side (suction side) of the filter 15, an outside air inlet for taking in outside air is provided. As will be described later, an amount of outside air separated by the separation membrane 25 and discharged to the outside of the system is introduced through the outside air inlet.
Further, the gas circulation source 17 whose end of the exhaust line 14 is connected to the suction side is a compressor (compressor) that discharges high-pressure gas toward the air supply line 16 on the discharge side. The capacity of the gas circulation source 17 may be set to an appropriate capacity according to the configuration of the circulation line including the separation membrane 25, the storage unit 10, the transport lines 34 and 35, which will be described later. Further, the gas circulation source 17 may be housed in a soundproof case.

  The air supply line 16 connected to the discharge side of the gas circulation source 17 is provided with a cooler (after cooler) 18 that cools the gas that has become hot in the gas circulation source 17. The cooler 18 may be cooled so that the temperature of the gas passing through the cooler 18 is, for example, 80 degrees or less, and preferably about 40 degrees to 60 degrees. In the illustrated example, the cooler 18 is an air-cooled type, but may be a water-cooled type, and various configurations can be adopted. The cooler 18 may be provided with a drain separator that removes the precipitated water.

The tempering unit 20 including the separation membrane 25 is provided in the air supply line 16 on the downstream side of the cooler 18.
This tempering unit 20 has a configuration in which a filter 21, an oil mist separator 22, a micro separator 23, a separation membrane 25, and a pressure gauge 24 are arranged in this order toward the downstream side. The filter 21, the oil mist separator 22 and the micro separator 23 are provided with a drain discharge part for discharging the removed moisture and oil.
The separation membrane 25 is configured to separate the moisture and / or oxygen unsuitable for drying the granular material from the gas that has been taken in, discharge the gas outside the system, and send the remaining gas to the supply line 16 on the downstream side. It is said that. In the present embodiment, the separation membrane 25 is a nitrogen separation membrane (nitrogen separator) 25 that separates oxygen from the taken-in gas and sends a nitrogen-enriched gas (nitrogen-rich gas) to the downstream supply line 16. As such a nitrogen separation membrane 25, it is good also as the hollow fiber membrane type nitrogen separation membrane 25 made into the structure which accommodated many hollow fiber membranes in the cylindrical body. In such a nitrogen separation membrane 25, when the compressed gas passes through the hollow fiber, oxygen passes through the membrane and is discharged, and a nitrogen-enriched gas (nitrogen-rich gas) is obtained on the outlet side of the hollow fiber.

The gas circulation source 17 described above is capable of discharging high-pressure (compressed) gas according to such a hollow fiber membrane type nitrogen separation membrane 25. Note that the gas circulation source 17 may be configured such that the pressure of the compressed gas on the discharge side is set so that nitrogen can be efficiently obtained in such a hollow fiber membrane type nitrogen separation membrane 25.
The pressure gauge 24 is configured to measure the pressure in the air supply line 16 on the downstream side of the nitrogen separation membrane 25. The pressure gauge 24 may be provided with a pressure switch or the like so that an abnormality can be notified by a lamp, an alarm, or the like as long as the pressure falls below a set pressure. Moreover, it is good also as a structure which can be adjusted so that the pressure of the supply line 16 of the downstream of the nitrogen separation membrane 25 may become a substantially constant pressure.
Further, in a suitable place of the drying apparatus 1 or the drying system A including the drying apparatus 1, a control circuit such as a CPU connected to each of the above-described devices via a signal line or the like, a memory or the like, and various operation programs. A control panel provided with a storage unit or the like for storing etc. is provided.

  In the drying system A including the drying device 1 configured as described above, each device is controlled by the control unit according to a preset program, and the granular material is dried and transported. For example, when the gas circulation source 17 is activated and the heating unit 13 is activated, the nitrogen-enriched gas as the drying gas separated in the nitrogen separation membrane 25 is heated through the air supply line 16 and the heating unit 13. The powder material in the hopper body 11 is heated and dried, discharged to the outside of the hopper body 11 through the exhaust line 14, and circulated through the gas circulation source 17. A part of the gas passing through the air supply line 16 is supplied to the supply destination 2 side via the branch line 30 and the supply destination side air supply line 33, passes through the hopper body 11, and, similarly to the above, the exhaust line 14 And is circulated through a gas circulation source 17. Moreover, if the material level in the hopper main body 11 falls by supply of the granular material to the supply destination 2, the switching valve 32 will be set to the transport side switching state. Thereby, a part of the gas passing through the air supply line 16 is supplied to the transport lines 34 and 35, and the powder material is pumped from the material source 5 toward the hopper body 11, and the gas used for this pumping is As above, the gas is circulated through the exhaust line 14 and the gas circulation source 17. The above operation example is merely an example, and various other modifications are possible.

The drying apparatus 1 according to the present embodiment and the drying system A provided with the drying apparatus 1 can effectively dry the particulate material by adopting the above-described configuration.
That is, the gas circulated and supplied to the storage unit 10 (the hopper body 11) via the exhaust line 14 and the air supply line 16 connected to the suction side and the discharge side of the gas circulation source 17 is separated from the separation membrane (nitrogen separation). The film) 25 is allowed to pass through. Therefore, as compared with the case where nitrogen is generated from outside air or compressed air taken from outside the system and mixed into the circulation circuit, almost all of the circulated gas passes through the nitrogen separation membrane 25 and is a drying gas. And the granular material can be effectively dried. This can reduce the need for a large amount of compressed air or the provision of a large nitrogen generator or the like.

That is, the drying apparatus 1 itself has a gas circulation source 17 that circulates and supplies gas to the reservoir 10 via the exhaust line 14 and the air supply line 16 and a nitrogen separation membrane 25 that exhausts oxygen from the circulated gas outside the system. The configuration is provided. Therefore, pressure fluctuations in the system are less likely to occur than when nitrogen is introduced from the outside of the apparatus, and a gas at a temperature higher than the outside air (for example, about 40 to 60 degrees) is stored in the nitrogen separation membrane 25 or stored. It can circulate and supply to the part 10, and can dry a granular material material effectively.
Moreover, in this embodiment, since the separation membrane 25 is the nitrogen separation membrane 25, oxidation of the granular material can be suppressed. Further, as the drying proceeds, the nitrogen concentration of the circulated gas can be increased to a concentration higher than the performance of the nitrogen separation membrane 25, and a high-concentration (high purity) nitrogen-enriched gas (nitrogen-rich gas) can be efficiently used. Can be circulated. Thereby, the size of the nitrogen separation membrane 25 can be reduced.

Further, in the present embodiment, the supply-side air supply line 33 communicated with the supply destination 2 of the granular material stored in the storage unit 10 is branched from the downstream portion of the nitrogen separation membrane 25 in the supply air line 16. It is set as the structure provided. Therefore, the gas circulated through the nitrogen separation membrane 25 can also be supplied to the supply destination 2 side, and oxidation of the particulate material on the supply destination 2 side can be suppressed.
In the present embodiment, the transportation lines 34 and 35 for pneumatically transporting the granular material from the material source 5 to the storage unit 10 are provided so as to be branched from the downstream portion of the nitrogen separation membrane 25 in the air supply line 16. It is configured. Therefore, the granular material from the material source 5 can be pneumatically transported using the gas circulated through the nitrogen separation membrane 25, and oxidation of the granular material during transportation can be suppressed. .
Moreover, in this embodiment, it is set as the structure which provided the switching valve 32 switched to the state which allows gas to pass through to this transport line 34,35. Therefore, by switching the switching valve 32 as described above, the granular material can be pneumatically transported from the material source 5 to the storage unit 10.

  Next, a modified example of the tempering unit incorporated in the drying apparatus 1 according to the present embodiment and the drying system A including the same will be described with reference to FIG. Note that differences from the above-described example will be mainly described, and the same components are denoted by the same reference numerals, and description thereof will be omitted or simplified.

FIG. 2A schematically shows a tempering unit 20A according to the first modification.
In this modification, a dehumidifying separation membrane 26 is provided as a separation membrane instead of the nitrogen separation membrane 25. That is, the dehumidifying separation membrane 26 is provided between the micro separator 23 and the pressure gauge 24. The dehumidifying / separating membrane 26 is configured to separate moisture from the taken-in gas and send a dry gas having a low dew point to the downstream air supply line 16. Such a dehumidifying separation membrane 26 may be a hollow fiber membrane type dehumidifying separation membrane (membrane dryer) 26 having a structure in which a large number of hollow fiber membranes are accommodated in a cylindrical body as described above. In such a dehumidifying separation membrane 26, when the compressed gas passes through the hollow fiber, water vapor is discharged through the membrane, and a dry gas having a low dew point is obtained on the outlet side of the hollow fiber. If it is set as the structure provided with such tempering unit 20A, the gas circulatingly supplied through the dehumidification separation membrane 26 turns into a gas of a low dew point, and a granular material can be dried effectively.

FIG. 2B schematically shows a tempering unit 20B according to the second modification.
In this modification, both the nitrogen separation membrane 25 and the dehumidification separation membrane 26 are provided as the separation membrane. In the illustrated example, a dehumidifying separation membrane 26 and a nitrogen separation membrane 25 are provided in this order on the downstream side of the microseparator 23 in this order toward the downstream side. With such a tempering unit 20B, the gas circulated through the dehumidification separation membrane 26 and the nitrogen separation membrane 25 becomes a low dew point and a nitrogen enriched gas, and the granular material is more It can be dried effectively.

FIG. 2C schematically shows a tempering unit 20C according to the third modification.
In the present modification, the first bypass line 27 that communicates the upstream portion and the downstream portion of the separation membrane (nitrogen separation membrane) 25 in the air supply line 16 is provided. That is, the first bypass line 27 that supplies a part of the gas passing through the air supply line 16 to the downstream side without passing through the nitrogen separation membrane 25 is provided. With such a configuration, the amount of oxygen or the like that is separated in the nitrogen separation membrane 25 and discharged out of the system is reduced. Therefore, compared with the case where such a first bypass line 27 is not provided, The flow rate of the gas supplied to the downstream side can be increased. In addition, from the viewpoint of efficiently circulating and supplying a high-concentration nitrogen-enriched gas, the diameter of the first bypass line 27 is appropriately set so that the flow rate of the gas passing through the first bypass line 27 becomes an appropriate flow rate. Alternatively, the first bypass line 27 may be provided with a flow rate adjusting valve similar to the above.

In addition, it is good also as a structure which provided the 1st bypass line 27 demonstrated in this modification in the tempering unit 20 mentioned above or the tempering unit 20A which concerns on a 1st modification. Further, in this modification, the example in which the upstream end of the first bypass line 27 is connected to the downstream side of the dehumidifying separation membrane 26 is shown, but a configuration in which it is connected to the upstream side of the dehumidifying separation membrane 26 may be adopted. In other words, a part of the gas passing through the air supply line 16 may be supplied to the downstream side without passing through both the dehumidifying separation membrane 26 and the nitrogen separation membrane 25.
Further, the first bypass connected to the supply line 16 at the downstream side portion of the separation membrane (nitrogen separation membrane) 25 is connected to the branch line 30 communicating with the supply side supply line 33 and the transport lines 34 and 35 described above. It is good also as a structure provided so that it may branch from the upstream part rather than the connection part of the line 27. FIG. According to this, although it is possible to increase the flow rate of the gas supplied to the storage unit 10 side, a high concentration nitrogen-enriched gas is supplied to the supply destination 2 side (or the material source 5 side). can do.

Next, another embodiment of the drying apparatus according to the present invention and a drying system including the same will be described with reference to the drawings.
FIG. 3 is a diagram schematically illustrating a drying device and a drying system including the drying device according to the second embodiment.
Note that differences from the first embodiment will be mainly described, and the same components will be denoted by the same reference numerals, and description thereof will be omitted or simplified.

  The drying apparatus 1A according to the present embodiment and the drying system B equipped with the drying apparatus 1A include a plurality of gas circulation sources 17 and 17, coolers 18 and 18, and refining units 20 and 20, respectively (two in the illustrated example). ) Air supply lines 16A, 16B are provided in parallel. In the present embodiment, two supply lines 16A and 16B are provided so as to be branched on the downstream side of the filter 15, and the end of one first supply line 16A is connected to the storage unit 10 as described above. Yes. The other end of the second air supply line 16B is connected to the switching valve 32A to which the merge line 30A and the upstream transport line 34 are connected. Further, the merging line 30 </ b> A is connected so as to be merged with the first air supply line 16 </ b> A on the downstream side of the refining unit 20. In addition, a supply-side air supply line 33 </ b> A that communicates with the supply destination 2 is provided so as to branch from the upstream side of the connecting portion with the first supply air line 16 </ b> A in the merging line 30 </ b> A. The supply side supply line 33A is provided with a flow rate adjustment valve 31A similar to the above.

If the switching valve 32A is in the first switching state in which the second supply line 16B and the merging line 30A are in communication, the gas that has passed through the second supply line 16B passes through the merging line 30A and the first supply line 16A and The air is supplied to the supply side supply line 33A. On the other hand, if the switching valve 32A is set to the second switching state in which the second supply line 16B and the upstream transport line 34 are communicated with each other, the gas passing through the second supply line 16B passes through the upstream transport line 34 and the material source. Air is sent toward the 5th side.
With such a configuration, the flow rate of the gas supplied to the storage unit 10, the supply destination 2, and the transport lines 34 and 35 can be increased as compared with the first embodiment.

Note that both or one of the first air supply line 16A and the second air supply line 16B may be the tempering unit of each of the above-described modifications.
Further, in the present embodiment, an example in which the gas circulation sources 17 and 17, the coolers 18 and 18, and the refining units 20 and 20 are provided in each of the air supply lines 16A and 16B is shown. It is not restricted to an aspect. For example, the tempering units 20 including a plurality of separation membranes 25 are provided in series or in parallel with respect to a single gas circulation source 17, or the gas circulation sources 17 provided in a plurality in series or in parallel are provided. On the other hand, it is good also as an aspect etc. which provided the tempering unit 20 containing the single separation membrane 25. FIG.

Next, still another embodiment of the drying apparatus according to the present invention and a drying system including the drying apparatus will be described with reference to the drawings.
FIG. 4 is a diagram schematically illustrating a drying device and a drying system including the drying device according to the third embodiment.
Note that differences from the first embodiment will be mainly described, and the same components will be denoted by the same reference numerals, and description thereof will be omitted or simplified.

  The drying apparatus 1B according to the present embodiment and the drying system C including the same include a second bypass line 28 that connects the exhaust line 14 and a downstream portion of the separation membrane (nitrogen separation membrane) 25 in the air supply line 16; The second bypass line 28 is provided with a blower 29 having a suction side connected to the exhaust line 14 side and a discharge side connected to the air supply line 16 side. With such a configuration, a part of the circulated gas can be supplied to the storage unit 10 via the second bypass line 28 without passing through the gas circulation source 17 and the nitrogen separation membrane 25. And the air volume of the gas supplied to the storage unit 10 can be effectively increased.

In the present embodiment, the second bypass line 28 is provided so as to branch from the exhaust line 14 on the downstream side of the filter 15 and to merge with the air supply line 16 on the downstream side of the flow rate adjusting valve 19.
A detector for detecting a predetermined control factor such as a nitrogen concentration, a dew point, and a temperature of the gas on the exhaust side of the storage unit 10 is provided in the second bypass line 28 so that a flow rate adjustment control is possible. Based on the detected value, the flow rate control valve may be controlled to execute control to change the flow rate of the gas passing through the second bypass line 28. That is, you may make it increase / decrease the flow volume of the gas which passes the nitrogen separation membrane 25 according to the dryness of the granular material material stored by the storage part 10, the dew point of gas, nitrogen concentration, etc. FIG.
Also in this embodiment, the tempering unit 20 may be any tempering unit of each of the above-described modifications.
Moreover, although each said embodiment showed the example which provided the supply side air supply line 33 (33A) and the transport lines 34 and 35 so that it may branch from the air supply line 16 (16B), these supply is shown. Only one of the front-side air supply line 33 (33A) and the transport lines 34 and 35 may be provided, or a drying device that does not have both may be used.

Next, still another embodiment of the drying apparatus according to the present invention and a drying system including the drying apparatus will be described with reference to the drawings.
FIG. 5 is a diagram schematically illustrating a drying device and a drying system including the drying device according to the fourth embodiment.
Note that differences from the first embodiment will be mainly described, and the same components will be denoted by the same reference numerals, and description thereof will be omitted or simplified.

  In the drying apparatus 1 </ b> C according to the present embodiment and the drying system D including the drying apparatus 10 </ b> A, the storage unit 10 </ b> A has a tank shape in which the heating unit 13 is not provided. Further, the tempering unit 20A according to the first modified example in which the dehumidifying separation membrane 26 is provided as a separation membrane is arranged in the air supply line 16. In addition, the supply side air supply line 30 </ b> B communicated with the supply destination 2 is provided so as to be branched from the downstream side portion of the separation membrane (dehumidification separation membrane) 26 in the air supply line 16. Further, the transport lines 37 and 38 for pneumatically transporting the granular material from the storage unit 10 </ b> A to the supply destination 2 are provided so as to be branched from the downstream portion of the separation membrane (dehumidification separation membrane) 26 in the air supply line 16. It is said.

That is, in this embodiment, it is set as the structure which pneumatically transports a granular material from the storage part 10A toward the supply destination 2. Moreover, it is set as the structure which provided the collection part 4 similar to the above in the input pipe 3 provided on the supply destination 2 which collects the granular material conveyed pneumatically. In this collection part 4, a supply side exhaust line 39 connected so as to join the downstream transport line 38 provided downstream of the discharge part of the storage part 10 </ b> A and the exhaust line 14 from the storage part 10 </ b> A. And are connected.
The supply side air supply line 30 </ b> B is configured to have the same flow rate adjusting valve 31 as described above, and is provided so as to branch from the air supply line 16 between the refining unit 20 </ b> A and the flow rate adjusting valve 19. Further, the end of the supply side supply line 30 </ b> B is connected to the collection unit 4 provided on the supply destination 2 via the heating unit 6. With such a configuration, the granular material supplied to the supply destination 2 can be preliminarily heated with the gas heated by the heating unit 6. In addition, it is good also as an aspect which connected the terminal of supply side air supply line 30B to the injection | throwing-in pipe 3 via the heating part 6. FIG.

  An upstream transport line 37 provided on the upstream side of the discharge unit of the storage unit 10 </ b> A is connected to the air supply line 16 via a switching valve 36. The switching valve 36 is a three-way switching valve, and a storage unit side line 16 </ b> C for supplying gas to the storage unit 10 </ b> A is connected to the switching valve 36. If this switching valve 36 is set to a storage unit side switching state in which the air supply line 16 and the storage unit side line 16C are communicated, the gas passing through the gas circulation source 17 and the refining unit 20A is supplied to the supply line 16 and the storage unit side. It is circulated and supplied to the reservoir 10A via the line 16C and the exhaust line 14. On the other hand, if the switching valve 36 is set to the transport side switching state in which the air supply line 16 and the transport lines 37 and 38 are communicated, the gas that has passed through the gas circulation source 17 and the refining unit 20A is supplied to the transport lines 37 and 38. Thereby, transportation to the collection part 4 of the granular material material discharged | emitted from 10 A of storage parts is made | formed. In any of the above states, part of the gas that has passed through the gas circulation source 17 and the refining unit 20A is circulated and supplied to the supply destination 2 side via the supply destination side supply line 30B and the supply destination side exhaust line 39. The

The switching of the switching valve 36 to the transport side switching state may be performed based on a material request signal such as a material sensor provided in the input pipe 3 of the supply destination 2.
In addition, the discharge part of the storage part 10A may discharge the particulate material toward the transport lines 37 and 38 in a so-called spilling manner, but as described above, discharge control (operation control or open / close control) is possible. It is good also as what was set as the structure which provided the appropriate opening-and-closing mechanism, the cutout part, etc.
Further, in the present embodiment, an example in which the tempering unit 20A according to the first modification is provided is shown, but instead, the tempering unit 20 described in the first embodiment and other modifications are shown. It is good also as a structure which provided tempering unit 20B, 20C which concerns.
In the present embodiment, the supply-side supply line 30B and the transport lines 37 and 38 are provided so as to branch from the supply line 16, but the supply-side supply line 30B and the transport line are provided. It is good also as a structure which provided only one of 37,38, or it is good also as a drying apparatus which does not provide both.
Further, the different configurations described in the above embodiments may be applied by appropriately rearranging or combining them, and the drying apparatus and the drying system including the same according to the present invention are described above. The present invention is not limited to such a configuration, and various modifications are possible.

A, B, C, D Drying system 1, 1A, 1B, 1C Drying device 10, 10A Reservoir 14 Exhaust line 16 Air supply line 16A First air supply line (air supply line)
16B Second air supply line (air supply line)
16C Reservoir side line (air supply line)
Reference Signs List 17 Gas circulation source 25 Nitrogen separation membrane 26 Dehumidification separation membrane 27 First bypass line 28 Second bypass line 29 Blower 30B, 33, 33A Supply side supply line 32, 32A Switching valve 34 Upstream transport line 35 Downstream transport line 2 Supplier 5 Material source

Claims (6)

A reservoir for storing the particulate material;
A gas circulation source having a suction side connected to an exhaust line connected to an exhaust side of the storage unit, and a discharge side connected to an air supply line connected to an air supply side of the storage unit;
A separation membrane that is incorporated in the air supply line, separates the gas for drying the granular material from the gas passing through the air supply line, and sends it to the downstream side;
A drying apparatus comprising: In claim 1,
The drying apparatus further comprising a first bypass line that communicates the upstream portion and the downstream portion of the separation membrane in the air supply line. In claim 1 or 2,
A second bypass line communicating the exhaust line and the downstream portion of the separation membrane in the air supply line, and a suction side is connected to the exhaust line side of the second bypass line, while a discharge side is connected to the air supply line side A drying apparatus, further comprising a connected blower. The drying apparatus according to any one of claims 1 to 3,
A supply side air supply line that is provided so as to branch from a downstream portion of the separation membrane in the air supply line and communicates with a supply destination of the granular material stored in the storage unit;
A drying system characterized by comprising: The drying apparatus according to any one of claims 1 to 3,
A transportation line that is provided so as to branch from a downstream portion of the separation membrane in the air supply line, and that pneumatically transports the granular material from the material source to the reservoir;
A drying system characterized by comprising: The drying apparatus according to any one of claims 1 to 3,
A supply side air supply line that is provided so as to branch from a downstream portion of the separation membrane in the air supply line and communicates with a supply destination of the granular material stored in the storage unit;
A transportation line that is provided so as to branch from a downstream portion of the separation membrane in the air supply line, and that pneumatically transports the granular material from the material source to the reservoir;
A switching valve that is switched to a state in which a drying gas passes through the transport line;
A drying system characterized by comprising:

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