JP2002115971A - Drying method and device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a drying method for effectively utilizing the heat source of a drying device and further for executing smooth drying operation by effectively utilizing drain that is discharged from a heat-exchange means as the heat source of a spare drying machine and further easily removing a lint that is built up in a capturing net without any help, and to provide the drying device. SOLUTION: The final drying of an object 12 to be dried is made by hot air that is created by a first vapor heater 22 that is provided at the drying machine 14. The preliminary drying of the object 12 to be dried is made by hot air that is created by a second vapor heater 30 that is provided at the spare drying machine 16. The first vapor heater 22 uses high-temperature vapor being introduced via a heat source introduction pipe 38 as a heat source. The second vapor heater 30 uses drain that is discharged from other heat exchange means as an iron for business with high-temperature vapor as a heat source as the heat source that is introduced via a heat source introduction pipe 42.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drying method and a drying apparatus for subjecting a large amount of towels to be dried, such as a large amount of washed towels, to preliminary drying and then to main drying.

[0002]

2. Description of the Related Art As a conventional drying apparatus, for example, there is one proposed by Japanese Patent No. 3044218. This is intended to efficiently dry a large amount of material to be dried that has been dehydrated after washing and is in an undried state.
The overall drying time can be shortened.

In this case, the pre-drying of the material to be dried is performed by a pre-dryer, and the main drying is performed by a main dryer. The main dryer has a steam heater for the main drying. Is provided. The steam heater generates hot air (about 160 ° C.) using the high-temperature steam introduced as a heat source, and the hot air is introduced into the main dryer. On the other hand, the pre-dryer is supplied with exhaust heat air (about 100 ° C.) after the main dryer performs the main drying, and the pre-drying is performed by the exhaust heat.

[0004] In such a drying apparatus, when the object to be dried is dried by the main dryer or the pre-dryer, lint or dust attached to the object to be dried is blown by hot air flowing in the dryer. Lint soars. This lint is captured by a capture net provided in the dryer so as not to adhere to the object to be dried again.

[0005]

However, in such a conventional drying apparatus, the high-temperature steam introduced into the steam heater of the present dryer has a low temperature (100 ° C.) when heat is exchanged by the steam heater. (Approximately 110 ° C.), the waste is discarded as a drain, or the drain is reduced to a boiler, heated, and reused as a heat source of the steam heater.

[0006] However, even if this drain is used at a low temperature after being used as a heat source in a steam heater, it is kept at 100 ° C.
A sufficiently high temperature of about 110 ° C. is maintained. For this reason,
Disposing of this drain results in a loss of heat, and when returning to a boiler, the boiler is usually installed at a certain distance from the drying device. The length of the drain pipe that supplies the drain becomes long, and a large heat loss occurs on the way.

[0007] This is not limited to the steam heater of the present dryer. Usually, the laundry to be dried is dried and then ironed. In a commercial iron, the high-temperature steam is used as a heat source. May be used. Further, in a factory, there are various types of heat exchange means other than the steam heater and the iron as heat exchange means using high-temperature steam, and discarding the high-temperature steam heat-exchanged by such heat exchange means as a drain is a calorific value. Loss will come.

On the other hand, when the lint generated when drying the material to be dried in the drying apparatus is captured by the capturing net, if a large amount of lint accumulates in the capturing net, clogging occurs and the capturing effect is reduced. The lint that is no longer caught on the object to be dried adheres again. For this reason, when lint accumulates in the trapping net to some extent, the drying device is stopped, and the lint accumulated by the operator is manually removed, so that the flow of a series of drying operations is interrupted and drying efficiency is reduced. .

Therefore, the present invention has been made in view of such a conventional problem, and effectively utilizes drain discharged from a heat exchange means as a heat source of a predryer, and furthermore, removes lint accumulated in a trapping net. An object of the present invention is to provide a drying method and a drying apparatus capable of easily utilizing a heat source of a drying apparatus and easily performing a drying operation by easily removing the heat source without manual operation.

[0010]

According to a first aspect of the present invention, there is provided a drying method in which a material to be dried preliminarily dried by a predryer is transferred to the main dryer and then main dried. Predrying heat exchange means for predrying the material to be dried,
The gist of the present invention is to introduce a drain that has been cooled to a low temperature by heat exchange by another heat exchange means, and pre-dry the object to be dried using the drain as a heat source.

In this case, the drain of the other heat exchange means is reused as a heat source of the preliminary drying heat exchange means without being discarded. The dried product can be pre-dried.

According to a second aspect of the present invention, there is provided a drying method in which a material to be dried preliminarily dried by a predryer is transferred to the main dryer, and the material to be dried is provided in the preliminary dryer. To the pre-drying heat exchanging means to be dried, drain which has been cooled by heat exchange by other heat exchanging means is introduced, and the exhaust heat air of the main dryer is introduced into the pre-drying means, and the heat of these other heat exchanging means is The gist of the present invention is to pre-dry the material to be dried using the drain and the exhaust air in the dryer as a heat source.

In this case, similarly to the drying method of the first aspect, the drain of the other heat exchange means is effectively used as a heat source of the preliminary drying heat exchange means. While pre-drying, the exhaust heat air of the main dryer introduced into the pre-dryer is used as a heat source for pre-drying, so that the heat generated by the pre-drying heat exchange means and the exhaust heat air of the main dryer are used. The object to be dried is pre-dried with both calories.

According to a third aspect of the present invention, there is provided the first aspect of the present invention.
Alternatively, in the drying method described in Item 2, the heat exchange means is a main drying heat exchange means provided in the main dryer for main drying the object to be dried.

In this case, the drain serving as a heat source of the predrying heat exchange means is obtained from the main drying heat exchange means of the main dryer provided in a pair with the predryer. It is necessary to minimize the decrease in temperature of the material to be dried when transferring the material to be dried preliminarily dried by the preliminary dryer to the main dryer. Placed. Therefore, the main drying heat exchange means and the preliminary drying heat exchange means come close to each other, and the drain is obtained from the main drying heat exchange means close to the preliminary drying exchange means.

The present invention described in claim 4 provides the above-mentioned claim 1.
In the drying method according to any one of the first to third aspects, the heat source used for the other heat exchange means is a high-temperature steam.

In this case, by using the high-temperature steam as a heat source, when the high-temperature steam is heat-exchanged by the heat exchange means,
The drain becomes hot water and is introduced into the preliminary drying heat exchange means.

According to a fifth aspect of the present invention, there is provided a main dryer for main drying the object to be dried, and a pre-dryer for pre-drying the object to be dried. In a drying device for transferring to a main dryer and performing main drying, a predrying heat exchange unit provided in the predryer for predrying an object to be dried and another heat exchange unit for discharging a drain cooled down by heat exchange And a drain supply path for supplying the drain of the heat exchange means as a heat source of the preliminary drying heat exchange means,
The gist is that it is provided.

In this case, the drain of the other heat exchanging means is supplied to the preliminary drying heat exchanging means via the drain supply path, and this drain is reused as a heat source of the preliminary drying heat exchanging means while the drying in the preliminary drying machine is performed. The material is pre-dried.

According to a sixth aspect of the present invention, there is provided a main dryer for main-drying the object to be dried, and a preliminary dryer for pre-drying the object to be dried. In a drying device for transferring to the main dryer and performing main drying, a preliminary drying heat exchange unit provided in the preliminary drying unit for preliminary drying the object to be dried, and a heat exchange unit for discharging a drain cooled down by heat exchange, A drain supply path for supplying the drain of the heat exchange means as a heat source of the preliminary drying heat exchange means communicates with the inside of the main dryer and the preliminary dryer to supply exhaust heat air of the main dryer to the preliminary dryer. And a heat supply path.

In this case, the drain of the heat exchanging means is supplied to the preliminary drying heat exchanging means via the drain supply path, and the exhaust heat air in the main dryer is also provided. Is supplied to the preliminary dryer through the exhaust heat supply path, and the object to be dried in the preliminary dryer is preliminary dried by the heat generated by the preliminary drying heat exchange means and the exhaust heat air of the main dryer.

According to a seventh aspect of the present invention, there is provided a main dryer for main-drying the object to be dried, and a preliminary dryer for pre-drying the object to be dried. In a drying device for transferring to the main dryer and performing main drying, a main drying heat exchange unit provided in the main dryer and main drying the object to be dried, and a preliminary drying unit provided in the predryer to predry the object to be dried. The gist of the invention is to provide a preliminary drying heat exchange unit and a drain supply path for supplying the drain of the main drying heat exchange unit as a heat source of the preliminary drying heat exchange unit.

In this case, the drain of the main drying heat exchange means is supplied to the preliminary drying heat exchange means via a drain supply path,
The object to be dried in the pre-dryer is pre-dried while reusing the drain as a heat source of the pre-drying heat exchange means. At this time, the main dryer and the preliminary dryer are arranged close to each other, so that the main drying heat exchange unit and the preliminary drying heat exchange unit come closer to each other, The drain supply path connecting to is shortened.

The present invention according to claim 8 provides the above-mentioned claim 5.
The drying apparatus according to any one of claims 1 to 7, which is provided in at least one of the main dryer and the preliminary dryer and captures a lint generated in a drying process. Lint scraping means for scraping and removing accumulated lint moving along the net surface is provided.

In this case, since the lint is trapped by the lint trapping net, lint separated from the substance to be dried is prevented from adhering again to the substance to be dried, and lint accumulated to some extent in the lint trapping net is prevented. Since the lint scraping means is removed only by moving along the net surface, clogging of the lint catching net is prevented.

The present invention described in claim 9 is the invention according to claim 5.
The drying apparatus according to any one of claims 1 to 7, wherein the lint capturing network is provided in at least one of the main dryer and the preliminary dryer, and captures lint generated in a drying process. The gist of the invention is to provide gas blowing means for blowing gas between the lint and the accumulated lint to separate the lint from the lint trapping net.

In this case, since the lint trapping net is provided in the same manner as in the drying apparatus according to the seventh aspect, the lint is trapped and prevented from adhering to the object to be dried. The lint that has accumulated to some extent in the lint trapping net is separated from the lint trapping net by gas blowing means. At this time, only the upper end of the accumulated lint is peeled off over a predetermined section, and the peeled upper end of the lint hangs downward, and the lint is gradually separated from the lint catching net by its own weight of the hung part. Removed.

According to a tenth aspect of the present invention, there is provided the drying apparatus according to the eighth or ninth aspect, wherein the lint removed from the lint trapping net is removed from the air in the dryer at a position below the lint trapping net. The gist of the present invention is to store it in the discharge container provided in the stagnation portion.

In this case, the lint that is removed from the lint trapping net and falls downward is accommodated in a discharge container in the dryer, and the discharge container is provided in a stagnation portion of the air. The lint stored in the container is not soared by the hot air flowing in the dryer.

[0030]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First Embodiment An embodiment of the present invention will be described below in detail with reference to the accompanying drawings. Figure 1
FIG. 2 shows a first embodiment of a drying apparatus to which the drying method of the present invention is applied, FIG. 1 is a perspective view of the drying apparatus, and FIG. 2 is a perspective view of a rotary drum used in the drying apparatus of FIG.

Drying apparatus 1 to which the drying method of the present invention is applied
Reference numeral 0 denotes a main dryer 14 for main drying the object 12 as shown in FIG. 1 and a preliminary dryer 1 for predrying the object 12 to be dried.
6, and the dried object 12 pre-dried by the pre-dryer 16 is transferred to the main dryer 14 to be main-dried.

That is, as shown in FIG. 1, the main dryer 14 includes a housing 18 constituting a main body of the dryer, a rotary drum 20 rotatably mounted in the housing 18, and hot air in the housing 18. It is schematically configured to include a first steam heater 22 as a main drying heat exchange unit for feeding and a first exhaust fan 24 for exhausting the inside of the housing 18. The preliminary drier 16 has substantially the same configuration as the main drier 14, and includes a housing 26 that forms a main body of the dryer, a rotating drum 28 rotatably mounted in the housing 26, and a housing 26. It is schematically configured to include a second steam heater 30 serving as a preliminary drying heat exchange unit that supplies hot air, and a second exhaust fan 32 that exhausts the inside of the housing 26.

The main dryer 14 and the preliminary dryer 16 are arranged such that the direction in which the material to be dried 12 is transported, that is, the direction of transport is the central axis direction of the rotary drums 20 and 28, and By adjoining in series, each is arranged in abutting state. At this time, in this embodiment, the preliminary dryer 16 is installed at a position one step higher than the main dryer 14. A shutter 34 is openably and closably provided between the main dryer 14 and the preliminary dryer 16 arranged in abutting relation, and the interior of the main dryer 14 and the interior of the preliminary dryer 16 are opened by opening the shutter 34. The communication between the two dryers 14 and 16 is airtightly closed by closing the shutter 34.

When the main dryer 14 and the pre-dryer 16 are arranged in abutting manner as described above, the material 12 to be dried is located on the side opposite to the abutting side.
An outlet (not shown) is provided, and the pre-dryer 16 is provided with an inlet 36 for the object 12 to be dried. The outlet and the inlet 36 are closed in a closed state during the drying operation of the drying device 10.

As shown in FIG. 2, the rotating drums 20 and 28 are formed as cylindrical drums each having a body portion formed in a mesh shape and having both ends open. 12 is captured. In addition, these two rotating drums 20 and 28 are provided with the main dryer 14 and the preliminary dryer 16 being arranged next to each other.
As shown in the figure, the shutters 34 are arranged in a state of abutting in the direction of the central axis, and the shutter 34 is arranged between them. At this time, the drum 28 of the pre-dryer 16 is eccentrically disposed above the drum 20 of the main dryer 14 with the pre-dryer 16 being installed at a position higher than the main dryer 14. And, each rotating drum 20,
Numeral 28 is rotated about respective central axes by a servomotor driven and controlled by a control unit (not shown),
The object to be dried 12 taken in by this rotation
Can be uniformly dried by stirring.

As shown in FIG. 1, the first steam heater 22 is constituted as a heat exchange means using a high-temperature steam introduced from a boiler (not shown) via a heat source introduction pipe 38 as a heat source. As the air in the dryer 14 is exhausted by the operation of the above, while the outside air is introduced into the housing 18 through the first steam heater 22, the steam circulating through the first steam heater 22 and The heat is exchanged to produce high-temperature hot air. The hot air has a high temperature of, for example, about 160 ° C., and is introduced into the main dryer 14 to perform the main drying of the object 12 to be dried. The steam after circulating through the first steam heater 22 and exchanging heat with the outside air becomes drain and becomes drain pipe 40.
Through the boiler.

As shown in FIG. 1, the second steam heater 30 is constituted as a heat exchange means using a heat source introduced through a heat source introduction pipe 42 as a drain supply path, and is similar to the first steam heater 22. While the outside air is introduced into the housing 26 through the second steam heater 30 by the operation of the second exhaust fan 32, heat is exchanged with the heat source circulating through the second steam heater 30 to generate hot air. ing.

At this time, as a heat source introduced through the heat source introducing pipe 42, other heat exchange means not shown, for example, a drain discharged from a commercial iron using high temperature steam as a heat source is used. This drain is discharged in a hot water state even though the high-temperature steam is heat-exchanged by another heat exchange means. The drain in the hot water state (100 ° C. to 110 ° C.)
Has better heat retention than gas. Therefore, by using this drain as a heat source, the second steam heater 30 can generate hot air having a high temperature sufficient for preliminary drying. Accordingly, the hot air is introduced into the pre-dryer 16 to pre-dry the object 12 to be dried. The drain after circulating through the second steam heater 30 is returned to the boiler through the drain pipe 44.

The first exhaust fan 24 exhausts the inside of the casing 18 of the main dryer 14, and the first steam heater 22 is provided on the upper surface of the casing 18 provided with the first steam heater 22 as shown in FIG. 22 is provided. An exhaust pipe 46 is connected to the first exhaust fan 24, and the exhaust heat air in the housing 18 is exhausted through the exhaust pipe 46.

The second exhaust fan 32 exhausts the inside of the housing 26 of the preliminary dryer 16, and is provided on the upper surface of the housing 26 so as to avoid the second steam heater 30. The exhaust heat air in the housing 26 is discharged through the connected exhaust pipe 48.

In order to dry the object to be dried 12 by the drying apparatus 10 having the above-described configuration, first, the shutter 34 is used.
In a state where the main dryer 14 and the preliminary dryer 16 are shut off by this, the washing-dried and dried dewatered articles are introduced into the respective rotating drums 20 and 28 from the outlet of the main dryer 14 and the input port 36 of the preliminary dryer 16. A predetermined amount of the dried material 12 is charged, and each outlet and the inlet 36 are closed. In this state, the main dryer 14 includes the first steam heater 22 and the first exhaust fan 2.
The rotating drum 20 is rotated while the operation of the drying unit 4 is performed, and the object to be dried 12 in the main dryer 14 is completely dried by hot air introduced from the first steam heater 22. On the other hand, the preliminary dryer 16 is
4, the second steam heater 30 and the second exhaust fan 32
, The rotary drum 28 is rotated, and the object to be dried 12 in the preliminary dryer 16 is preliminarily dried by the hot air introduced from the second steam heater 30.

When the main drying is completed in the main dryer 14, the main dryer 14 and the preliminary dryer 16 are stopped,
The object 12 to be dried is taken out from the outlet of the main dryer 14, the shutter 34 is opened, the pre-dried object 12 in the pre-dryer 16 is taken into the main dryer 14, and then the shutter 34 is closed. A new material to be dried 12 that has been dehydrated after washing is put into the empty pre-dryer 16. Then, by restarting the drying device 10, the main drying and the preliminary drying as described above are repeatedly performed.

At this time, in order to take in the pre-dried material 12 from the pre-dryer 16 into the main dryer 14, for example, means for transferring the pre-dried material 12 to the drum 20 by a belt conveyor (not shown) arranged below the drum 28 is used. As another means, the inside of the main dryer 14 is evacuated to a negative pressure state, and the shutter 34 is opened in this state. There is a method of transferring the object to be dried 12 by blowing the object to be dried 12 into the main dryer 14 as it is sucked. Of course, this transfer means is not limited to these, and
Other methods can be appropriately used depending on the structure of the object 0 and the type of the object 12 to be dried.

Here, in the drying apparatus 10 of the present embodiment, the second steam heater 30 provided in the predryer 16 generates hot air for predrying the object 12 to be dried. However, the second steam heater 30 is configured to introduce, as a heat source, a drain that has been subjected to heat exchange by another heat exchange unit and has been cooled. In other words, the drain of the other heat exchange means is conventionally accompanied by a large heat loss even if it is discarded or reduced to the boiler. It can be effectively used for preliminary drying of the dryer 16. Therefore, the heat loss of the entire steam required for the drying apparatus 10 including the other heat exchange means is suppressed, and the heating capacity of the boiler for producing the steam is reduced, thereby reducing the running cost. be able to.

<Second Embodiment> FIG. 3 shows a second embodiment of the present invention, in which the same components as those in the first embodiment are denoted by the same reference numerals, and will not be described. FIG. 3 is a perspective view of a drying apparatus 10a according to this embodiment. This embodiment is mainly different from the first embodiment in that the exhaust heat air of the main dryer 14 is added to the configuration of the first embodiment. It is to be introduced into the predryer 16 for predrying.

That is, as shown in FIG. 3, in the drying apparatus 10a of this embodiment, a second steam heater 30 is provided in the preliminary dryer 16 similarly to the first embodiment, and another heat source is used as a heat source for the same. The drain of the heat exchange means is introduced through the heat source introduction pipe 42. Then, after the second steam heater 30 is provided for preliminary drying as described above, the main dryer 14 is further provided.
The exhaust pipe 46 connected to the exhaust fan 24 is used as a waste heat supply path, and the leading end opening thereof is directed obliquely downward, and communicates with the upper front surface of the housing 26, and the waste heat discharged from the main dryer 14. Air is introduced into the preliminary dryer 16.

Accordingly, in this embodiment, the drain of the main dryer 14 is maintained at a high temperature (about 100 ° C.) while effectively using the drain of the other heat exchange means as the heat source of the second steam heater 30. Pre-drying can also be performed by effectively using hot air. For this reason, the preliminary drying of the preliminary
Since both the heat generated by the steam heater 30 and the heat exhaust air of the main dryer 14 can be used, the efficiency of predrying the object to be dried 12 can be increased.

In this embodiment, when the exhaust pipe 46 for introducing exhaust heat air communicates with the upper part of the front surface of the housing 26,
Since the front end opening is directed obliquely downward, when transferring the dried object 12 that has been subjected to the preliminary drying from the preliminary dryer 16 to the main dryer 14, the exhausted hot air blown from the exhaust pipe 46 generates The object to be dried 12 can be boosted to facilitate the transfer of the object to be dried 1.

<Third Embodiment> FIG. 4 shows a third embodiment of the present invention, in which the same components as those in the first and second embodiments are denoted by the same reference numerals, and a duplicate description will be omitted. FIG.
Is a perspective view of a drying device 10b of this embodiment. This embodiment is mainly different from the first and second embodiments in that the main dryer 1b is used as a heat source of the second steam heater 30 of the preliminary dryer 16.
4 in that the drain of the first steam heater 22 is used.

That is, as shown in FIG. 4, the drying device 10 b of this embodiment includes a drain port 50 of the first steam heater 22 of the main dryer 14 and an introduction port 52 of the second steam heater 30 of the preliminary dryer 16. Are connected by a connection pipe 54 as a drain supply path, and the drain discharged from the first steam heater 22 is introduced as a heat source of the second steam heater 30 via the connection pipe 54.

Therefore, even in this embodiment, the drain of the first steam heater 22 is discharged in a hot water state in which a high temperature of about 100 ° C. to 110 ° C. is maintained. By introducing the heat as a heat source of the second steam heater 30 through the connection pipe 54, the second steam heater 30 can generate hot air having a high temperature sufficient for preliminary drying. For this reason, while the drain of the first steam heater 22 is reused, the material 1 to be dried in the preliminary dryer 16 is reused.
2 can be pre-dried.

At this time, the main dryer 14 and the preliminary dryer 16
Means that the dried object 12 is transferred to the main dryer 14 from the pre-dryer 16 without lowering the temperature. The first steam heater 22 and the second steam heater 30 are located close to each other. Further, in the present embodiment, as shown in FIG.
And the introduction port 52 of the second steam heater 30 are disposed on the opposite side, so that the length of the connection pipe 54 can be further reduced. Therefore, the heat loss during the passage of the drain through the connection pipe 54 can be reduced, the temperature of the hot air generated in the second steam heater 30 can be increased, and the efficiency of preliminary drying can be improved. Further, since the connecting pipe 54 is shortened, the piping structure can be made compact.

In this embodiment, as shown in FIG. 4, an exhaust pipe 46 connected to the exhaust fan 24 of the main dryer 14 is provided.
Is taken out of the drying device 10 as in the first embodiment, but is not limited to this, and the exhaust pipe 46 is communicated with the preliminary dryer 16 as in the second embodiment. Of course, it may be possible.

<Drying Apparatus Having Lint Supplementary Mechanism> By the way, the drying apparatus 1 shown in the first, second, and third embodiments will be described.
At 0, 10a, and 10b, as shown in FIG.
4 and a lint trapping net 62 for trapping lint 60 generated in the drying process inside the casings 18 and 26 of the predryer 16.
Is provided. Although FIG. 2 shows a cross section of the main dryer 14, the same reference numerals as those of the preliminary dryer 16 are given in parentheses, and the main dryer 14 and the preliminary dryer 1 are hereinafter referred to.
The lint capturing function in No. 6 will be described with reference to the respective symbols.

That is, the lint 60 is sowed by the hot air W flowing in the housings 18 and 26 when the dried object 12 is dried by lint or dust attached to the dried object 12. This hot air W is supplied to the first and second steam heaters 22 and 30.
After being introduced into the casings 18 and 26 from the exhaust fans 24 and 32, they are circulated clockwise in the drawing.

The lint trapping network 62 is provided with a hot air W
Near the upstream side of the exhaust fans 24, 32 with respect to the flow direction of
It is arranged in a space S between the inside of the housings 18 and 26 and the drums 20 and 28, and in order to increase the effective capturing area of the lint capturing network 62,
28 are disposed so as to be oriented substantially in the tangential direction.

As shown in FIG. 6, the lint trapping net 62 has a width corresponding to the entire length inside the housings 18 and 26 and a height sufficient to shield the space S in the tangential direction of the drums 20 and 28. A window 62b (three places in this embodiment) having an area sufficient to allow the hot air W to pass therethrough is formed in the shielding plate 62a, and a net 62c is formed in the window 62b.
It is constructed by sticking with tension.

Therefore, the hot air W flowing in the housings 18 and 26 flows through the window 62b to the exhaust fans 24 and 32 as shown in FIG. The lint 60 is captured by the net 62c, and the lint 60 is prevented from re-adhering to the material 12 to be dried.

Here, the lint trapping network 62 has a structure shown in FIG.
As shown in FIG. 9, a wiper 64 is provided as lint scraping means for moving along the net surface F (see FIG. 7) of the lint catching net 62 to scrape and remove the accumulated lint 60.

The wiper 64 is formed of a heat-resistant flexible member such as heat-resistant rubber, and is disposed so as to be vertically movable across the entire width of the window 62b as shown in FIGS. Inner surface of movable plate 66 (surface facing shield plate 62a)
Attached to As shown in FIG. 9, the tip of the wiper 64 is formed to be sharp and pointed obliquely downward.
The acute point is brought into contact with the net surface F. Needless to say, the wipers 64 are provided corresponding to the respective window portions 62b, and in this embodiment, three wipers 64a, 64b, 64c (see FIG. 8) are provided which match the widths of the three window portions 62b. Can be

The movable plate 66 is vertically movably mounted on a pair of guide rails 68, 68a which are mounted on both sides of the shielding plate 62a in a height direction. Also, a pair of drive shafts 70,
The drive shaft 70a is mounted so as to be oriented in the width L direction, and sprockets 72, 72a are mounted on both ends of the drive shafts 70, 70a, respectively. And the drive shaft 7
Sprockets 72, 72 at each corresponding end of 0, 70a
Chains 74, 74a are circulated between a, and a part of the chains 74, 74a is attached to the movable plate 66. The movable plate 66 is lowered and raised by rotating one drive shaft 70 forward and backward through the motor 76, the sprockets 78 and 78a and the chain 80. Further, the vertical movable range of the movable plate 66 is limited by an upper limit switch and a lower limit switch.

Accordingly, by lowering the movable plate 66, the wiper 64 moves downward from above while contacting the net surface F, and can scrape off the lint 60 attached to the net 62c. Then, by moving up the movable plate 66, the wiper 64 is returned to the upper end of the window 62b, and is set to an initial state (standby state).

Therefore, in this embodiment, the lint trapping network 6
By driving the motor 76 when the lint 60 accumulates to a certain extent, the wiper 64 can automatically descend along the net surface F to remove the accumulated lint 60. For this reason, the lint trapping net 62 can easily remove the lint 60 by driving the motor 76, so that the efficiency of the drying operation is prevented from being reduced, and the lint 60 is always caught by eliminating the clogging. Can be kept.

FIGS. 10 and 11 show another embodiment of lint removal, in which lint 60 accumulated in a lint trapping net 62 is removed by blowing air.
That is, as shown in FIG. 10, a nozzle 82 as a gas blowing means is attached to the upper end of the shielding plate 62a at the upper edge of the window 62b. Injection port 8 of this nozzle 82
2a is formed continuously in the width direction of the window portion 62b, and is directed from the upper end edge of the mesh surface F in a direction along the mesh surface F as shown in FIG. This nozzle 82
Is connected to a compressed air tank (not shown) via a hose 84, and the compressed air is opened by opening a cock (not shown) provided in the middle of the hose 84 so that the compressed air is discharged from the injection port 82 a of the nozzle 82.
It is to be injected from.

Therefore, when the lint 60 accumulates in the lint trapping net 62 to a certain extent, the cock is opened and air is jetted from the nozzle 82 so that the upper end of the lint 60 accumulated as shown in FIG. Peeled from F. At this time, in the present embodiment, since the nozzle 82 is fixed, the jetted air actively separates the upper end portion of the lint 60, but the separated portion hangs down over a predetermined section X, so that the dripping occurs. The entirety of the lint 60 that has accumulated due to its own weight P is gradually separated from the net 62b and removed. For this reason, since the accumulated lint 60 only needs to be peeled off at the upper end thereof over the predetermined section X, the nozzle 82 does not need to be fixedly provided at the upper end of the lint trapping net 62 and moved. Can be simplified.

By the way, the lint 60 removed from the lint trapping net 62 is located at a position below the lint trapping net 60, as shown in FIG. (Area) in the discharge container 86. This stagnation part Q is
The corner portion C provided below the lint capture net 62 of the 8, 26 is used. An opening 88 having an opening area sufficient to allow the removed lint 60 to pass therethrough is formed on the lower surface of the corner portion C, and the discharge container 86 is detachably attached to the lower side of the opening 88. When the removed lint 60 accumulates in the discharge container 86, it can be removed and the contents can be easily discarded.

Accordingly, the lint 60 removed from the lint trapping net 62 is accommodated in the discharge container 86, and the discharge container 86 is provided in the stagnation portion Q of the air.
Since the lint 60 once accommodated in the discharge container 86 can be prevented from rising by the hot air W flowing in the housings 18 and 26, the lint 60 is prevented from re-adhering to the object 12 to be dried.

[0068]

According to the drying method of the present invention, the drain of the other heat exchange means can be reused as the heat source of the pre-drying heat exchange means. By effectively utilizing the drain that has been treated as waste, the overall heat loss can be reduced and the running cost can be reduced.

According to the drying method of the present invention, the drain of the other heat exchange means is pre-dried as a heat source of the pre-drying heat exchange means, and the exhaust heat air of the present dryer is used for the pre-drying. Since it is used as a heat source, the material to be dried can be pre-dried with both the heat generated by the pre-drying heat exchange means and the exhaust heat air of the main dryer, so that the efficiency of the pre-drying can be improved.

According to the drying method of the present invention, the drain serving as the heat source of the predrying heat exchange means is obtained from the main drying heat exchange means of the main dryer provided near the predryer. Therefore, the heat loss of the drain can be reduced, the hot air temperature generated by the predrying heat exchange means can be increased, and the predrying efficiency can be improved.

According to the drying method of the fourth aspect of the present invention, since the heat source of the other heat exchange means for generating the drain which is the heat source of the preliminary drying heat exchange means is high-temperature steam, the drain is in a state of hot water. Therefore, since the heat retention is superior to that of gas, the temperature of the heat source introduced into the preliminary drying heat exchange means can be kept high.

According to the drying apparatus of the present invention, the drain of the other heat exchange means is supplied to the preliminary drying heat exchange means through the drain supply path, and the drain is supplied through the drain supply path. It is possible to pre-dry the object to be dried in the pre-dryer while effectively using the introduced drain as a heat source of the pre-drying heat exchange means, thereby reducing the overall heat loss and reducing the running cost. it can. Further, the drain supply path can pass through the drain supply path in an arbitrary shape.

According to the drying apparatus of the present invention, the drain of the heat exchange means is supplied to the preliminary drying heat exchange means via the drain supply path, and the exhaust heat air in the main dryer is further exhausted. Since the pre-dryer is supplied to the pre-dryer via the heat supply path, the object to be dried in the pre-dryer can be pre-dried by both the generated heat of the pre-drying heat exchange means and the exhaust heat air of the main dryer. Higher predrying heat can be generated to increase predrying efficiency.

According to the drying apparatus of the present invention, the drain of the main drying heat exchanging means provided in the main drier is connected to the pre-drying heat exchanging means provided in the pre-dryer via the drain supply path. As the heat source is supplied as the heat source, the drain of the main drying heat exchange unit can be effectively used as the heat source of the preliminary drying heat exchange unit. Further, the main dryer and the preliminary dryer are arranged close to each other, and accordingly, the main drying heat exchange unit and the preliminary drying heat exchange unit come closer to each other, and these two heat exchange units are connected to each other. The connected drain supply path can be shortened. Therefore, heat loss during the passage of the drain through the drain supply path can be reduced, and the piping structure of the drain supply path can be made compact.

According to the drying apparatus of the present invention, since at least one of the main dryer and the preliminary dryer is provided with the lint catching net and the lint scraping means for scraping the lint, the drying apparatus is not dried. The lint separated from the object is captured by the lint catching net, so that the lint can be prevented from adhering to the object to be dried again, and the lint accumulated in the lint catching net is removed by the lint scraping means along the net surface. Since it can be moved and easily removed, clogging of the lint trapping net can be prevented while suppressing a decrease in the efficiency of the drying operation.

According to the drying device of the present invention, at least one of the main dryer and the preliminary dryer is provided with a lint trapping net and a gas blowing means for separating the lint from the lint trapping net. Therefore, the lint separated from the object to be dried can be captured by a lint capturing net to prevent the lint from adhering to the object to be dried again, and the lint accumulated in the lint capturing network can be captured by the gas blowing means. Clogging can be prevented by peeling from the net. At this time, by removing the upper end portion of the accumulated lint and hanging down, the lint can be gradually removed from the lint trapping net by its own weight of the hung portion, and the lint by the gas blowing means can be removed. It is only necessary to remove the upper end of the lint over a predetermined section. For this reason, since the gas blowing means does not need to be fixedly provided at the upper end of the lint catching net and moved, the structure can be simplified.

The drying device of the present invention according to claim 10 is
The lint that is removed from the lint-trapping net and falls downward is accommodated in a discharge container provided in a stagnation portion of the air in the dryer at a position below the lint-trapping net. Since it is possible to prevent the lint from flying up by the hot air flowing in the dryer, it is possible to prevent the lint from re-adhering to the object to be dried.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a first embodiment of a drying apparatus according to the present invention.

FIG. 2 is a perspective view of a rotary drum used in the first embodiment of the drying device according to the present invention.

FIG. 3 is a perspective view showing a second embodiment of a drying device according to the present invention.

FIG. 4 is a perspective view showing a third embodiment of a drying apparatus according to the present invention.

FIG. 5 is a longitudinal sectional view of a main part of a drying apparatus according to the present invention.

FIG. 6 is a front view of a lint capturing net provided in the drying device according to the present invention.

FIG. 7 is a side view of a lint capturing net provided in the drying device according to the present invention.

FIG. 8 is a plan view of a lint capturing net provided in the drying apparatus according to the present invention.

FIG. 9 is an enlarged sectional view of a main part of a lint scraping means of a lint trapping net provided in a drying apparatus according to the present invention.

FIG. 10 is a front view showing another embodiment of the lint trapping net provided in the drying apparatus according to the present invention.

FIG. 11 is a side view of a gas blowing means of a lint trapping net provided in the drying apparatus according to the present invention.

[Explanation of symbols]

 10, 10a, 10b Drying device 12 Material to be dried 14 Main dryer 16 Predryer 22 First steam heater (Main drying heat exchange means) 30 Second steam heater (Predry drying heat exchange means) 42 Heat source introduction pipe (Drain supply) Path) 46 exhaust pipe (exhaust heat supply path) 54 connection pipe (drain supply path) 60 lint 62 lint capture network 64 blade (lint scraping means) 82 nozzle (gas spraying means) 86 discharge container

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) D06F 58/02 D06F 58/02 S F26B 3/04 F26B 3/04 11/04 11/04 F-term (Reference) 3L113 AA06 AB02 AC05 AC25 AC45 AC46 AC48 AC58 AC63 AC68 AC83 AC86 BA01 DA02 DA06 DA14 DA24 4L019 AA02 AC04 AG01

Claims (10)

[Claims] 1. An object to be dried preliminarily dried by a predryer,
In the drying method of transferring to the main dryer and performing the main drying, the drain, which has been cooled by another heat exchange means, is introduced into the predrying heat exchange means provided in the predryer for predrying the material to be dried. And drying the object to be dried using the drain as a heat source. 2. An object to be dried preliminarily dried by a predryer,
In the drying method of transferring to the main dryer and performing the main drying, the drain, which has been cooled by another heat exchange means, is introduced into the predrying heat exchange means provided in the predryer for predrying the material to be dried. In addition, the exhaust heat air of the main dryer is introduced into the preliminary dryer, and the object to be dried is pre-dried using the drain of the other heat exchange means and the exhaust heat air in the main dryer as heat sources. Drying method. 3. The drying method according to claim 1, wherein the other heat exchanging means is a main drying heat exchanging means provided in the main drying machine for main drying the object to be dried. A drying method characterized by the above-mentioned. 4. The drying method according to claim 1, wherein the heat source used for the other heat exchange means is high-temperature steam. 5. A main dryer for main drying the object to be dried, and a pre-dryer for pre-drying the object to be dried, wherein the object to be dried preliminarily dried by the pre-dryer is transferred to the main dryer and subjected to main drying. A pre-drying heat exchange means provided in the pre-dryer for pre-drying the material to be dried; another heat exchange means for discharging a drain cooled down by heat exchange; and other heat exchange means. A drain supply path for supplying a drain as a heat source of the preliminary drying heat exchange means. 6. A main dryer for main-drying the object to be dried and a preliminary dryer for pre-drying the object to be dried. A pre-drying heat exchange means provided in the pre-dryer for pre-drying the material to be dried; another heat exchange means for discharging the drain cooled to a low temperature by heat exchange; A drain supply path for supplying a drain as a heat source of the preliminary drying heat exchange means, and a waste heat supply path for communicating the inside of the main dryer with the inside of the preliminary dryer and supplying the exhaust heat air of the main dryer to the preliminary dryer, A drying device comprising: 7. A drying apparatus for main drying the object to be dried and a pre-dryer for pre-drying the object to be dried. A drying device provided in the main dryer, a main drying heat exchange unit for main drying the object to be dried; a predrying heat exchange unit provided in the preliminary dryer to predry the object to be dried; A drain supply path for supplying a drain of the main drying heat exchange unit as a heat source of the preliminary drying heat exchange unit. 8. The lint trap according to claim 5, wherein the lint trap is provided in at least one of the main dryer and the preliminary dryer to trap lint generated in a drying process. And a lint scraping means for scraping and removing accumulated lint moving along the net surface of the lint catching net. 9. The lint trap according to claim 5, wherein the lint trap is provided in at least one of the main dryer and the pre-dryer to trap lint generated in a drying process. A gas blowing means for blowing a gas between the lint trapping net and the lint accumulated in the lint trapping net and separating and removing the accumulated lint from the lint trapping net. . 10. The drying device according to claim 8, wherein the lint removed from the lint trapping net is accommodated in a discharge container provided at a position below the lint trapping net in a stagnation portion of air in the dryer. A drying device.