JPS62147282A - Dehumidifying drying method and equipment for powder and granular materials - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a dehumidifying and drying method for powder and granular materials such as synthetic resin materials and an apparatus therefor.

(Prior art) As a method of dehumidifying and drying powder and granular materials, air that has been dried by passing through an adsorption tower containing an adsorbent such as molecular air is placed in a drying hopper containing the material to be dried using VB.
A device that dehumidifies and dries the material to be dried by supplying a ring has conventionally been used. In this method, moisture accumulates on the adsorbent over time and the drying efficiency of the air decreases, so in addition to the drying process that dehumidifies and dries the material to be dried, the moisture accumulated on the adsorbent is removed and regenerated. A regeneration process is required.

To perform such reproduction, (a) Japanese Patent Application Laid-Open No. 51-221
Among the wi ring lines that return from the adsorption tower to the adsorption tower via the drying hopper, as described in Publication No. 65, the adsorption tower,
By using a part of the line including a blower and rotating the blower in the opposite direction to that used in the drying process, outside air is introduced to regenerate the adsorbent, and the regenerated outside air is transferred to the container. One that constitutes a one-pass line that discharges to the outside is known. Furthermore, (0) in a small-sized synthetic resin molding machine, there are problems in terms of space, strength, and stability when attaching a large hopper to the molding machine. Therefore, the drying area and the molding machine are often installed separately, and the dried material is transported from the drying hopper to the molding machine.

In this case, in the past, it was either to use a separate air source for transportation, or to use dehumidified air as the air for transportation, to bring in dehumidified air from outside, or to use dehumidified air taken from the drying line. It was supposed to be used for transportation and released outside after use.

In the conventional methods (a) and (b) above, the drying line and regeneration line are not used for transporting undried materials to the drying hopper and transporting dried materials from the drying hopper to the destination. Pneumatic transport was carried out using a separate transport line for undried materials and a transport line for dried materials.

(Problem to be Solved by the Invention) However, in the above (a), the drying line and the regeneration line can be switched only by forwarding and reversing the blower.
Transport of wet and dried materials cannot be carried out by switching the blowers as described above. In other words, drying
Apart from the blower for regeneration, a blower dedicated to transporting the material is required, and a line for pneumatically transporting the material also needs to be prepared completely separately, which complicates the configuration of the device.

Additionally, this requires a reverse valve to make the drying line a closed circuit. This check valve has restrictions such as air volume, wind pressure, installation angle, and installation position, and it opens and closes depending on the interaction of these conditions.
It is usually difficult to run the line stably (
It is difficult to avoid outside air (leakage), making it impossible to realize a stable closed circuit in the drying line. Therefore, there is a great possibility that it will be affected by the outside air, making it difficult to obtain a stable dew point or a low dew point. Furthermore, since a large number of reverse valves are required, there is an even more problem. Moreover, since the above-mentioned separate blowers, lines, and check valves are required, there are problems such as increased costs.

Furthermore, as mentioned above, the method (0) not only requires a blower dedicated to transporting materials that is separate from the blowers for drying and regeneration, but also requires a completely separate line for pneumatically transporting the materials. The configuration of the device becomes complicated and the cost increases.

In addition, when using dehumidified air as described above, dehumidified air is introduced from outside as described above, or dehumidified air taken from the drying line is used for transportation and then released outside after use. However, it is difficult to control the temperature and humidity of the dehumidified air, and the dried material returns to an undried state.

This invention aims to solve the problems in the conventional example, and uses one air power source (blower) for both the drying line and the regeneration line. , at least the transportation of dried material from the drying hopper (or the transportation of undried material to the drying hopper) can be carried out efficiently.Moreover, the transportation route for the material is a complete closed circuit, and the transportation air is The dried material is kept in dehumidified air with controlled temperature and humidity through the adsorption tower so that it does not come into contact with the outside air, and the dried material returns to its original state B (
This prevents undried material from returning to the drying tray and allows the dried material to be transported to its destination. The dehumidified air transporting the dried material to its destination can then be continuously circulated to the adsorption tower via the pneumatic power source. In addition, there is no need for a reverse valve as described in the conventional example (a) to switch between regeneration and drying, and the above-mentioned leak can be eliminated by ideally switching with the switching valve described below, and the outside air can be switched. It is not affected by the drying process, and a stable dew point and low dew point can be obtained, and an excellent drying effect can be obtained. In addition, the present invention provides a method for dehumidifying and drying powder and granular material, which has a simple configuration and can reduce the cost of the device, and an apparatus therefor.

(Means for Solving the Problems) The method for dehumidifying and drying powder and granular material according to the first invention uses the above-mentioned method using a one-pass line that discharges outside air sucked in by an air power source such as a blower to the outside of the device through an adsorption tower. A regeneration process that dehumidifies and regenerates the adsorbent in the adsorption tower, and a supply/exhaust process in the adsorption tower that shares the path from the air power source to the adsorption tower in the one-pass line and is switched in the opposite direction to the regeneration process using a switching valve. A first Wi ring line that follows a route back to the pneumatic power source via the drying hopper performs a drying process in which the material in the drying hopper is removed and dried, and during the drying process, the first Wi ring line Among the ring lines, air power source, adsorption tower,
A secondary transportation process in which the dried material is pneumatically conveyed from the drying hopper to the destination by a second circulation line that shares a path including the drying hopper and returns from the discharge part of the drying hopper to the air power source via the destination. It is characterized by including.

In addition, the method for dehumidifying and drying powder and granular material according to the second invention includes a regeneration step in which the adsorbent in the adsorption tower is dehumidified and regenerated by a one-pass line in which outside air sucked in by an air power source is discharged outside the device through the adsorption tower. During the period of the regeneration process, the one-pass line is also used to create a negative pressure in the pneumatic route from the material container to the input section of the drying hopper, and pneumatically transport the material from the material container to the drying hopper. The transportation process shares the route from the air power source to the adsorption tower in the one-pass line mentioned above, and the air power source passes through the drying hopper and follows the route inside the adsorption tower, which can be switched in the opposite direction to the regeneration process using the switching valve. During the drying step of dehumidifying and drying the material in the drying hopper by the first Wi ring line that returns to the source, the air power source, adsorption tower, and drying hopper of the first circulation line are removed during the drying step. a secondary transportation step of pneumatically transporting the dried material from the drying hopper to the destination by a second circulation line that shares the same route and returns from the discharge part of the drying hopper to the pneumatic power source via the destination. It is characterized by this.

Further, the dehumidifying and drying device for powder and granular materials according to the third invention includes a drying device that includes an air power source such as a blower, an adsorption tower, a drying hopper, and a circulation line that returns to the air power source via a first switching valve. system, and a regeneration system consisting of a one-pass line that shares a line including an air power source and an adsorption tower in the drying system;
a second switching valve that switches the supply/exhaust route in the adsorption tower in opposite directions between a drying system and a regeneration system;
The back side of the drying system includes a line including an air power source, an adsorption tower, and a drying hopper, and also has a pneumatic line connecting the discharge part of the drying bomber to the destination, and the drying system has a pneumatic line that connects the discharge part of the drying bomber to the destination, and The present invention is characterized by comprising a secondary transportation system in which a material input section to the destination is communicatively connected to the line.

Furthermore, the dehumidifying and drying device for powder and granular materials according to the fourth aspect of the present invention includes an air power source such as a blower, an adsorption tower, a drying hopper, and a circulation line that returns to the air power source via a first switching valve. system, a regeneration system consisting of a one-pass line that shares a line containing the air power source and adsorption tower in the drying system, and an air supply and exhaust route in the adsorption tower that is oriented in opposite directions for the drying system and the regeneration system. It has a second switching valve that switches so as to coexist with the one-pass line of the regeneration system, and has a pneumatic line that connects the material container and the input part of the drying hopper,
A primary transportation system in which the input section of the drying hopper is communicatively connected to the one-pass line via the first switching valve shares a line including the air power source, adsorption tower, and drying hopper in the drying system. and a secondary transport system having a pneumatic line connecting the discharge part of the drying hopper and the destination, and connecting the material input part to the line through the first switching valve. It is characterized by:

In the adsorption tower, a cooling device of any shape is provided above or below the adsorbent, or both.

(Example) An example of the present invention will be described below based on FIGS. 1 to 8.

FIG. 1 is a flow diagram showing an apparatus for use in the dehumidifying and drying method of the present invention, in which a blower (1
), the adsorption tower (2), the second switching valve (3), the drying hopper (4), the first switching valve (5), and a circulation line that returns to the blower (1) again. A drying system (8) for dehumidifying and drying the material to be dried (powdered material such as synthetic resin material) in 4) is formed. A filter (6) is provided in the middle of the line connecting the switching valve (5) and the blower (1). The adsorption tower (2) has a partition wall (2a)
It has a double cylinder structure divided into an inner circumferential air space and an outer circumferential air space, and the inner circumferential air space and the outer circumferential air space are communicated at the upper part. In the outer circumferential space of this adsorption tower (2), an adsorbent (7) such as molecular sheep is accommodated, and the adsorbent (7)
) A cooling device (8) for regeneration is provided, and a heater (9) shared for drying and regeneration is provided in the inner circumferential air space. A second switching valve (3) connects an air supply port (a) that introduces air from the blower (1) and the adsorption tower (2).
The boat (b) opens into the space where the heater (9) is installed, and the boat (b) opens into the space where the adsorbent (7) of the adsorption tower (2) is accommodated.
c), a boat (d) that opens outside the vessel, and a boat (1ie) that communicates with the drying hopper (4). The pipe line Oal connecting the above switching valve (3) (e) and the drying hopper (4) is connected to the drying hopper (4).
A trumpet-shaped air outlet (10a) is formed at the end of the air conditioner and opens downward.

In the middle of the pipe line 0υ that directly connects the drying hopper (4) of the drying system (A) and the first switching valve (5), there is an adsorbent (a regenerating pipe for introducing outside air that is opened only during the regeneration process). An air inlet (lla) is provided, the regeneration air inlet (11a);
First switching valve (5), filter (6), blower f1. l
, the second switching valve (3), the adsorption tower (2), and the second switching valve (3) boat (d) to the outside of the vessel. ) is constructed. That is, the filter (6
), blower (1), adsorption tower (2), second switching valve (3)
Some lines of the drying system (A) including the regenerating system (B) are shared.

On the other hand, the material input part 0 of the drying hopper (4) and the suction nozzle Q41 facing the material container 0 hot water are connected to the pipe QS.
By connecting with + to form a pneumatic line and communicating the material input section (2) with the regeneration system (B) via the first switching valve (5), drying can be performed from the material container O contention. A primary transport system (C) is configured for pneumatically conveying undried material into the hopper (4). That is, the regeneration system (8)
The one-pass line is shared as part of the line of the primary transport system (C), and is used to create a negative pressure inside the material input section αδ of the drying hopper (4).

Also, the material input section 07 of the destination Ql (for example, if the material to be dried is a synthetic resin material, a molding machine that uses the dried synthetic resin material) to which the dried material in the drying hopper (4) is transported ) and the discharge part of the drying hopper (4) are connected by a pipe line 0 to form a pneumatic line, and the eye material input part Q7+ is connected to the drying part through the first switching valve (5). By connecting the system (A) continuously for 5 m, a secondary transport system (D) for pneumatically transporting the dried lumber 1 from the drying hopper (4) to the destination 00 is constructed. That is,
Drying system (A) including a filter (6), blower (1), adsorption tower (2), second switching valve (3), drying hole, bar (4)
A part of the line is shared with the secondary transportation system (D) and is used to create a negative pressure inside the material input section 01 of the destination QID. In this case, the drying hopper (4) (excluding the dried material transported from the material input section α to the destination αX) is transferred from the material input section 0 to the pipe line without being mixed with outside air. (18a), first switching valve (5), air JJI power source +
11. It is circulated without baggage to the drying hopper (4) via the adsorption tower (2).

The first switching valve (5) is, for example, a four-way switching valve,
It is constructed so that the communication state between the four boats (1) to (2) can be switched according to each group. In addition, by further increasing the number of ports of the first switching valve (5), a secondary transportation system ([+) can be added to selectively transfer dried materials to multiple destinations...a61. It is also possible to send Note that (10b) is a pipe branched from the pipe Q[Il, and the other end of which is connected to the discharge part of the drying hopper (4). Further, a valve may be installed at an arbitrary location on the lob to block air from flowing into the lob. Furthermore, one end of this pipe (IQb) is connected to the pipe between the air power source (1) and the adsorption tower (2), and the other end is connected to the glue 1 outlet of the drying hopper (4) as described above. You can also.

FIG. 2 is a longitudinal sectional view showing the specific structure of the second switching valve (3), which is a case (
1gl, a rotor (201) rotatably provided in the α ring of this case, and a drive H (2n) that rotationally drives this rotor (2IIl. On one side of the case ILJ is a blower (201). The above-mentioned air supply port (a) that communicates with the discharge side of the rotor 11 is formed.The rotor (2fl) is made of a T-shaped tube body, and one of the tube ends Q21 is the air supply port for the case α value. (a), while the other two cylinder ends Q1 and (2@ face the inner wall surface of the cylinder with case α value) and rotate around the position corresponding to the axis of the air supply port (a). The rotation axis of rotor Q (Il) is
The above two cylinder ends in the direction perpendicular to 2S, (2
4), one of the cylinder end portions Q has a blind seal body 12I.
The other two cylinder ends (23, (24) form an L-shaped communication path. On the other hand, the cylinder end (23, (24)
4) side, an annular seal body forehead is fitted inside, and a compression spring Q is inserted between this annular seal body forehead and a blind seal body position @ on the cylinder end am side, so that these two seal bodies Ql ,
The blade is configured to be slidably pressed against the inner wall surface of the cylinder having a case α value. The above-mentioned case α value has an upper half connected to the lower end of the adsorption tower (2) as shown in FIGS. The boat (b) is the heater (9) of the adsorption tower (2).
) communicates with the installation airspace. In addition, the boat (e) that opens at the lower position of the cylindrical peripheral wall of the case (191) communicates with the drying hopper (4) via the pipe aω as described above. The aforementioned boat (c) that opens at one horizontal position of the cylindrical peripheral wall is an adsorption tower (2
The boat (d) communicates with the adsorbent (7) accommodation space of the vessel (d) and opens at the other lateral position of the cylindrical peripheral wall portion, and is open to the outside of the vessel. The cylindrical inner space of case 01J and the air supply port (a) are the partition wall (19a) in case α1.
It is airtightly sealed by an O-ring (2g+) interposed between the outer periphery of the cylinder end (shape) of the rotor (211), and the cylinder end of the rotor Qfll (the inner wall surface of the cylinder 2 and the blind seal body Q). and between the inner wall surface of the cylinder end r24 and the annular seal body (5) are also airtightly sealed by an O-ring (end) and a port υ. H(2
Each boat (b) to (e) is connected to the rotating shaft 0 of the boat (b) to (e) by changing the position of the rotor (on the cylinder end (2) of the two shafts) by rotationally driving the drive source (21). It is configured to switch between open and closed states. In Figure 2, o3
is a magnet provided on the rotating shaft (c) side of the rotor Ql, and (b) is a reed switch provided on the scratched side of the case α.The rotor I211 is placed in the rotational position where the magnet Oj and the reed switch (b) face each other. The rotational position is controlled by operating the reed switch (b) when the rotational position approaches. o9 is a bearing that supports the cylindrical end (shaft) side of the rotor Q, and 0- is a bearing that supports the rotating shaft Oa side.

Next, the dehumidifying drying method performed using the above-mentioned device will be described.
An example will be explained separately for each process of regeneration, primary transportation, and secondary transportation.

(2) Drying process In the flowchart of FIG. 1, in this drying process, the first switching valve (5) is set to communicate only between boats (2) and (2). Further, the second switching valve (3)
As shown in the figure and Fig. 4, a boat (
d) is closed with a rotor (2 m blind cylinder end H), while
The boat (e) that communicates with the drying hopper (4) and the boat (b) that opens toward the air space where the heater (9) of the adsorption tower (2) is installed are opened, and the end of the cylinder is connected to the boat (C). is set to a state consistent with As a result, the second switching valve (3
) and the adsorption tower (2), between the air supply port (a) and the boat (c
) - adsorbent (7) storage space - heater (9) installation space - boat (b) - boat (e) communication path is formed. Therefore, the air introduced into the air supply port (a) of the second switching valve (3) by the drive of the air power source (blower) (1) is as follows:
From the path between the second switching valve (3) and the adsorption tower (2), the air power rA (blower )+11 will flow through the drying system (A) of the circulation line.

The humid air introduced from the air supply port (a) of the second switching valve (3) follows the path indicated by the arrow in FIG. 7) and becomes dry air. This drying air is heated by a heater (9), and is sent from the boat (e) through a pipe Ql to a drying hopper (4).
be introduced within. This dry and heated air comes into contact with the material to be dried, such as a synthetic resin material, housed in the drying hopper (4), thereby dehumidifying and drying the material to be dried. The air moistened by the above dehumidifying and drying is passed through the pipe QD from the top of the drying hopper (4).

The air returns to the air power source (blower) (1) via the first switching valve (5) and filter (6), and the above cycle is repeated. The filter (6) removes dust and the like contained in the recovered air.

(2) Regeneration step In this step, regeneration is performed to remove the moisture adsorbed by the adsorbent (7) in the previous drying step and restore the adsorption capacity of the adsorbent (7). In this regeneration process, the first switching valve (5) is set to the same state as in the drying process, but the second switching valve (3) is switched to the state shown in Figures 5 and 6. It will be done.

That is, the boat (e) connected to the drying hopper (4)
) is the blind cylinder end of the rotor (2), which is closed with hot water but opens to the outside (d), and the boat (d) which opens to the side where the adsorbent (7) of the adsorption tower (2) is accommodated. (c) is opened and the cylinder end (2) is aligned with the boat (b).Thereby, there is no supply between the second switching valve (3) and the adsorption tower (2). Air vent (a) - boat (b)
- Heater (9) installation space - Adsorbent (7) storage space - Boat (c) - Boat (d) communication path is formed.

In addition, in this process, a regeneration air inlet (Il
a) is released.

Therefore, by driving the air power source (blower) (1), air from outside the device introduced from the regeneration air inlet (lla) is passed through the first switching valve (5), the filter (6), and the air power source. (Blower) The air is supplied to the air supply port (a) of the second switching valve (3) via (1), and then the air is supplied to the boat (d) from the communication path between the switching valve (3) and the adsorption tower (2) described above. It flows through the regeneration system (B) of the one-pass line that returns to the outside of the device.

The air introduced from the air supply port (a) of the second switching valve (3) follows the path indicated by the arrow in FIG.
2) is heated by the heater (9) inside. This heated air is
Next, it flows through the air space containing the adsorbent (7) in the adsorption tower (2).

On the other hand, cooling water is flowed through the cooling device (8) which is also installed in the air space containing the adsorbent (7), and its cooling action causes the adsorbent (7) whose adsorption capacity has decreased due to moisture absorption in the previous drying process. ) decreases in temperature, and moisture in the adsorbent (7) condenses on the surface.

This condensed moisture is heated and evaporated as the heated air passes through, and the air is discharged from the boat (d) together with the evaporated moisture. By the above action, the adsorbent (7) is dehumidified and dried and regenerated.

■ Secondary transportation process This secondary transportation process transports the dried material in the drying hopper (4) to the destination 0! It is intended to be transferred to As shown in the flow diagram in Fig. 7, this process is carried out during the drying process mentioned above, and at this time, the first switching valve (5) is operated so that the boats ■, ■, ■ are in communication with each other. Can be switched. By this switching, a part of the line of the drying system (A) from the first switching valve (5) to the drying hopper (4) is shared, and from the discharge part of the drying hopper (4) to the material input part αη of the destination Ol. A secondary transport system (D) of a circulation line is formed which returns to the first switching valve (5) through the . The material input section α is formed in an airtight manner, and inside thereof, an air space from the opening of the pipe α to the destination Q19 and an air space leading to the first switching valve (5) are separated by a filter (not shown). . Therefore, due to the suction action of the blower (11), the inside of the material input section aη is made negative and positive, whereby the dried material is pneumatically fed from the discharge section of the drying hopper (4) to the material input section αη via the pipe OI. The air is dropped into the destination Oe.In other words, in the secondary transportation system (0), a part of the air from the drying system (A) is used.At this time, the presence of the filter in the material input part Q71 This prevents material from flowing into the line side including the adsorption tower (2).

■ Primary transportation process This primary transportation process is carried out from the material container 01 to the drying hopper (
4) to transfer the material to be dried into the drying chamber.

As shown in the flow diagram in FIG. 8, this step is carried out within the period of the previous regeneration step, and at this time, the first switching valve (5
) is switched so that boats ■, ■, ■ are in communication with each other. This switching causes the first switching valve (5
) to the bow 1-(d) of the second switching valve (3), and the material container a is connected to this line.
A primary transport system (C) is formed in which a line is connected from the flow pipe 051 to the first switching valve (5) via the material input section side. In this case as well, the material input section 0 is connected to the air power source (
A negative pressure is created by the suction action of the blower (1), and the material to be dried is pneumatically fed from the material container α through the suction nozzle αa and the pipe a9 to the material input section (2), and then into the drying hopper (4). ) is dropped within.

Inside the material input section @, the material is fed by an air power source (blower).
(1), the fact that it does not flow into the exhaust side line including the adsorption tower (2) is the same as in the case of the material input part aη of the secondary transportation described above.

In addition, when considering a small molding machine as the destination αe, for example, the processing capacity of the molding machine is 4 kg/hour, and the drying time is approximately 3.
5 hours, the capacity of the drying hopper (4) is 15 k
It must be g. Each transport system at this time (C)
, (D) is set to 120 kg/hour - 2 kg/min, regeneration time is 15 minutes, and drying time is 45 minutes per hour cycle.Since it starts from regeneration, during that time, the transport capacity is set to 120 kg/hour - 2 kg/min, regeneration time is 15 minutes, and drying time is 45 minutes. Materials can be input. That is, the following relationship holds true: 15 (kg) ÷ 2 (kg/min) = 7.5 minutes < 15 minutes. Therefore, the drying hopper (4) can be filled during the first regeneration period.

Since the subsequent amount of material input into the drying hopper (4) is 4 kg per hour, 4 (kg/hour) ÷ 120 (kg/hour) x 60 = 2 minutes. Therefore, from the second time onwards, it is only necessary to transport for 2 minutes during the 15 minutes of regeneration.

Next, in the case of secondary transportation to supply the material to the molding machine side, the transportation time is 2 minutes since the amount is 4 kg per hour.
This means that it is only necessary to transport for 2 minutes out of 45 minutes.

During regeneration, material cannot be supplied to the molding machine, but the consumption amount during that time is 4 (kg/hour) ÷ 60 x 15 minutes - 1 kg. Therefore, there is no problem as long as the amount of charge on the molding machine side is 1 kg or more.

As described above, the primary transportation during the regeneration process and the secondary transport during the drying process can be performed smoothly without causing any inconvenience to the regeneration or drying.

Although we have emphasized here that primary transport and secondary transport can be performed in parallel during the regeneration and drying processes, even in the case of a configuration in which transport systems (C) and (D) are omitted, It also has a unique function of being able to share the same line for regeneration and drying by the action of the second switching valve 31. That is, since the second switching valve (3) switches the supply and exhaust routes in the adsorption tower (2) so that they are in opposite directions for regeneration and drying as described above, the blower (1), the adsorption tower ( The line containing 2) is shared for regeneration and drying.

(Effects of the Invention) According to the method and device for dehumidifying powder and granular material of the present invention, loading the material into the drying hopper and transporting the dried material from the drying hopper to the destination can be carried out in the regeneration and drying process. These processes can be carried out in parallel during the process, and they can also be transported using part of the regeneration and drying lines, improving the efficiency of dehumidification and drying. etc.) can also be used for material transportation, regeneration, and drying, so the configuration is simple and the equipment cost and operating cost can be reduced.

Furthermore, compared to the conventional example (a), no check valve is required to switch between regeneration and drying, and the first and second switching valves can perform ideal switching, so there is no leakage. As a result, a stable dew point and a low dew point can be obtained without being affected by the outside air, and an excellent drying effect can be obtained.

Furthermore, at least the secondary transport system is constantly maintained at a constant temperature of 7! via the adsorption tower. Dehumidified air with a controlled temperature can be used as transportation air, and the air used as transportation air is collected again in the adsorption tower and is constantly circulated through the adsorption tower, creating a closed circuit, so the dew point is stable. There is an effect.

[Brief explanation of drawings]

Each of the figures shows an embodiment of the present invention. Fig. 1 is an overall flow diagram, Fig. 2 is a vertical cross-sectional view of the switching valve, and Fig. 3 is a diagram showing the flow between the adsorption tower and the switching valve during the drying process. A longitudinal cross-sectional view showing the route;
Figure 4 is an exploded perspective view showing the state of the switching valve in the drying process, Figure 5 is a vertical sectional view showing the path between the adsorption tower and the switching valve in the regeneration process, and Figure 6 is the switching valve in the regeneration process. FIG. 7 is a flowchart when drying and secondary transportation are performed in parallel, and FIG. 8 is a flowchart when regeneration and primary transportation are performed in parallel. (1)...Air power source (blower'), (2+...Adsorption tower, (3)...Second switching valve, (4)...Drying hopper, (5)...First switching valve, (7)... adsorbent, (8)... cooling device, (9)... heater, (2
)...Material input section, aS...Material container, 061...
・Destination, 071...Material input section, (^)...Drying system, (I3)...Regeneration system, (C)...Primary transportation system,
(D) ...Secondary transport system. Patent Applicant: Matsui Seisakusho Co., Ltd. Figure 2 Figure 5 Figure 6 (self-motivated) Proceeding Officer Hosho November 29, 1985 1. Indication of the case 1985 Patent Application No. 289817 2. Name of the invention Dehumidifying and drying method of granules and its device 3, and its relationship with the case of the person making the amendment Patent application: 6-5-26 Tanimachi, Minami-ku, Osaka Name: Matsui Seisakusho Co., Ltd. Representative: Osamu Matsui 4, Agent address: 1-12-19-5 Nishihonmachi, Nishi-ku, Osaka 550
, Date of amendment order (shipment date) Voluntary +11 On page 23, lines 9 to 15 of the specification, the phrase "or more" has been replaced with "or more." This adsorbent ( The moisture adsorbed by the adsorbent (7) is heated and evaporated as the heated air passes through, and the air is released from the boat (d)) together with this emitted moisture. Cooling device installed (8
), and due to its cooling effect, the temperature of the adsorbent (7), which became high in this heating process, rapidly decreases.
The adsorption capacity of the adsorbent (7) is rapidly restored. That's all.'' (2) In the third line of page 24, the words "Boat ■, ■, ■" will be corrected to "Boat ■, ■." (3) On page 24, line 17, the phrase "part of air" will be corrected to "air." (4) On page 25, No. 6, the words r boat ■, ■, ■J will be corrected to "boat ■, ■." (5) The phrase "15...at this time" in the fourth line of page 26 must be r14Kg or more. For example, if the capacity of the drying hopper (4) is 15Kg, correct it as follows. (6) Insert the following text between lines 19 and 20 of page 27. "In addition, although the cooling device (8) was used in the regeneration process in the above example, it can also be used in the drying process." (7) Figures 7 and 8 will be corrected as shown in the attached drawings.

Claims (6)

[Claims] (1) A regeneration step in which the adsorbent in the adsorption tower is dehumidified and regenerated by a one-pass line that discharges the outside air sucked in by the air power source to the outside of the vessel through the adsorption tower; The first circulation line, which shares the same route to the drying hopper and returns to the air power source via the drying hopper, follows the supply and exhaust route in the adsorption tower, which is switched in the opposite direction to the regeneration process using the switching valve. During the drying process of dehumidifying and drying the material and the drying process, a route including an air power source, an adsorption tower, and a drying hopper in the first circulation line is shared, and a destination is reached from the discharge part of the drying hopper. A method for dehumidifying and drying powder and granular material, comprising a secondary transportation step of pneumatically transporting the dried material from a drying hopper to a destination via a second circulation line that returns to the pneumatic power source. (2) A regeneration step in which the adsorbent in the adsorption tower is dehumidified and regenerated by a one-pass line that discharges the outside air sucked in by the air power source to the outside of the device through the adsorption tower, and during the period of the regeneration step, the one-pass line is When used together, the primary transport process of pneumatically transporting the material from the material container to the drying hopper by creating a negative pressure in the pneumatic route from the material container to the input section of the drying hopper, and the adsorption from the pneumatic power source in the one-pass line mentioned above. The first circulation line that shares the route to the tower and is switched in the opposite direction to that in the regeneration process using the switching valve, returns to the air power source via the drying hopper and follows the route within the adsorption tower. A drying process of dehumidifying and drying the material;
During the period of the drying process, the first circulation line shares a path including the air power source, the adsorption tower, and the drying hopper and returns from the discharge part of the drying hopper to the air power source via the destination. 2. A method for dehumidifying and drying powder and granular material, comprising a secondary transportation step of pneumatically transporting the dried material from a drying hopper to a destination using a circulation line. (3) A drying system consisting of an air power source, an adsorption tower, a drying hopper, and a circulation line that returns to the air power source via the first switching valve, and a line that includes the air power source and the adsorption tower in the drying system. a regeneration system consisting of a one-pass line that shares the same, a second switching valve that switches the supply/exhaust route in the adsorption tower in opposite directions between the drying system and the regeneration system, and one of the drying lines. It shares a line including an air power source, an adsorption tower, and a drying hopper, and has a pneumatic line connecting the discharge part of the drying hopper to the destination, and supplies the material to the destination via the first switching valve. A dehumidifying and drying device for powder and granular materials, comprising: a secondary transport system in which an input section is communicatively connected to the line. (4) The apparatus for dehumidifying and drying powder and granular material according to claim (3), wherein a cooling device is provided in the adsorption tower at one or both of the upper and lower sides of the adsorbent. (5) A drying system consisting of an air power source, an adsorption tower, a drying hopper, and a circulation line that returns to the air power source via the first switching valve, and a line that includes the air power source and the adsorption tower in the drying system. a regeneration system consisting of a one-pass line that shares the regeneration system; a second switching valve that switches the supply/exhaust route in the adsorption tower in opposite directions between the drying system and the regeneration system; and the one-pass line of the regeneration system. A primary transportation system that shares a line and has a pneumatic line that connects the material container and the input section of the drying hopper, and connects the input section of the drying hopper to the one-pass line through the first switching valve. The drying system shares a line including an air power source, an adsorption tower, and a drying hopper among the drying lines, and has a pneumatic line connecting the discharge part of the drying hopper to the destination, and the first switching valve is connected to the drying system. A dehumidifying and drying apparatus for powder and granular material, comprising: a secondary transport system in which a material input section to the destination is communicatively connected to the line via the line. (6) The apparatus for dehumidifying and drying powder and granular material according to claim (5), wherein a cooling device is provided in the adsorption tower at one or both of the upper and lower sides of the adsorbent.