JPH078687A - Equipment and method for heat-exchange/dust-collection of dryer - Google Patents

Abstract

PURPOSE:To reduce the running cost, and simplify the maintenance at a linnen factory by recycling the heat of hot air which contains dust and dirt being discharged from a dryer while preventing a heat-exchanger from being clogged. CONSTITUTION:After making hot air, which contains dust and dirt being discharged from a dryer 1 to dry laundry in it, pass through a dust-collector 2, the hot air being discharged from the dust-collector 2 from which dust and dirt have been removed is made to pass through a heat-exchanger 3. Then, the air of which the temperature is raised by a heat-exchange with hot air by the heatexchanger 3 is fed to a dryer 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat exchange dust collecting facility for a dryer and a heat exchange dust collecting method.

[0002]

2. Description of the Related Art In a linen factory, a plurality of large dryers are continuously operated in order to dry a large amount of laundry such as towels and clothes at once. This dryer is for drying the laundry put in a drying drum rotating in the box by blowing hot air heated by a heater onto the laundry, and discharging hot air after drying the laundry in the box. Exhaust duct is connected.

Therefore, conventionally, the hot air after drying the laundry is discharged from the factory through the exhaust duct as it is.

[0004]

However, exhausting the warm air from the dryer to the outside of the factory as it is causes the increase of energy cost because the heat energy once added is discarded to the outside. Therefore, for example, a cross-flow plate type heat exchanger (for example, see FIG. 5 according to the embodiment) in which a large number of plate-shaped elements are closely arranged at regular intervals is provided on the discharge side of the dryer to dry the heat exchanger. It is possible to reuse the heat of the warm air from the machine.

However, since the hot air after drying contains a large amount of dust such as fiber dust, simply connecting the heat exchanger to the discharge side of the dryer causes dust to be immediately generated between the elements of the heat exchanger. It becomes clogged and its maintenance requires a lot of labor. In addition, it is not preferable to discharge hot air containing a large amount of dust outside the factory as it is in terms of environmental problems near the factory.

In view of the above situation, the present invention makes it possible to reuse the heat of warm air containing dust discharged from the dryer while preventing clogging of the heat exchanger, thereby reducing running costs at a linen factory. The purpose is to reduce and simplify maintenance.

[0007]

[Means for Solving the Problems] In order to achieve the above object,
The present invention has taken the following technical means. That is, the invention according to claim 1 relates to a heat exchange dust collecting method for a dryer. In this heat exchange dust collecting method, warm air containing dust discharged from a dryer for drying laundry inside is applied to the dust collector. After that, the hot air from which the dust discharged from the dust collector is removed is passed through a heat exchanger, and the air heated by the heat exchange with the hot air in the heat exchanger is supplied to the dryer. To do.

Further, the invention according to claim 2 relates to a heat exchange dust collecting equipment of a dryer, and the heat exchange dust collecting equipment has a dryer for drying laundry inside and a warm air discharged from the dryer. A dust collector that collects the dust of the above, a heat exchanger that exchanges the heat of the hot air from which the dust discharged from the dust is removed into fresh air, and the temperature is raised by heat exchange with the warm air in this heat exchanger. An intake duct for supplying the dried air to the dryer.

[0009]

In the present invention, the exhaust air discharged from the dryer is first applied to the dust collector and then the hot air from which the dust has been removed is applied to the heat exchanger, so that the heat exchanger can be prevented from being clogged. Further, since the air heated by the heat exchange with the warm air is supplied to the dryer, the amount of heat heated by the heater in the dryer can be small.

[0010]

An embodiment of the present invention will be described in detail below with reference to the drawings. 1 to 4 show the outline of the dust collection heat exchange equipment of the dryer used in this embodiment. This equipment includes a plurality of dryers 1 for drying laundry inside, a dust collector 2 for collecting dust of exhaust air (warm air) discharged from each dryer 1, and a dust collector 2 for discharging the dust. Heat exchanger 3 for exchanging the heat of the warm air from which the dust has been removed into fresh air, and the intake air that supplies the air heated in the heat exchanger 3 with the warm air to each dryer 1. And a duct 33.

The dryer 1 has a rectangular airtight box 5
A drying drum 6 is rotatably provided inside the drying drum 6
The laundry such as towels and clothes put in is dried by blowing hot air heated by a heater (not shown). In this embodiment, five dryers 1 are arranged in series in a linen factory. An exhaust duct 7 for discharging warm air after drying the laundry is connected to the lower part of the box 5 of each dryer 1, and the exhaust duct 7 of each dryer 1 is combined into a pair of transport ducts 8. And is connected to the next dust collector 2.

A damper 9 is rotatably supported in each exhaust duct 7 to close the duct 7 in an inclined state to prevent backflow of warm air, and a counterweight 10 is fixed to the base end side of the damper 9. ing. Therefore, while the warm air is being discharged from the box 5, the damper 9 is in an upright posture and the warm air is discharged, but when the discharge of the warm air is stopped, the damper 9 tilts and blocks the exhaust duct 7. It has become.

In the present embodiment, the dust collector 2 is a so-called filter type. The dust collector 2 has a rectangular dust box 12 in which the conveying duct 8 is connected to a top plate 11, and a filter 1 made of felt on the circumferential surface.
A cylindrical frame-shaped dust cage 14 to which 3 is attached is rotatably provided around the horizontal axis. The inside of the dust box 12 is divided into two chambers 16 and 17 via a partition wall 15. The dust cage 13 is provided in the first chamber 16 to which the transfer duct 8 is connected, and the other second chamber 17 is provided. Is a blower 18 that creates a negative pressure inside the dust cage 13.
Is provided. Therefore, from the transport duct 8 to the first chamber 1
When the warm air containing dust enters 6, the dust only adheres to the outer peripheral surface of the dust cage 13, and the warm air purified by this reaches the second chamber 17.

A long slider 19 is installed laterally of the dust cage 13 in the axial direction of the cage 13. A pair of suction heads 20 for sucking dust adhering to the filter 13 run on the slider 19. It is provided freely. Each suction head 20 is connected to the first chamber 16 via a hose.
It is connected to the discharge pipe 21 provided in the. This discharge pipe 21
Is equipped with a suction motor 22 in the middle thereof and is connected to a dust collector 23 composed of a bag filter provided on the side of the dust box 12.

A transport duct 26 for sending the purified warm air to the next heat exchange device 25 is connected to the side surface of the dust box 12 on the second chamber 17 side. The heat exchanging device 25 is configured by connecting the upper and lower ducts 27, 28 arranged in a vertical relative resistance manner with a plurality of vertical ducts 29, and disposing the heat exchanger 3 in the middle of the vertical ducts 29. ing. The transfer duct 26 is connected to one end of a lower duct 28, and an exhaust port 30 for exhausting hot air after heat exchange to the outside of the factory is provided on a side surface of the upper duct 27.

In this embodiment, each heat exchanger 3 employs a cross flow type partition plate type shown in FIG. That is, in the heat exchanger 3, a large number of plate-shaped elements 32 are closely arranged at regular intervals in a rectangular parallelepiped main body frame 31 whose four side surfaces are open in a frame shape. When warm air is introduced from above and cool air is introduced from the plane orthogonal to that plane, heat exchange is performed between both air fluids isolated by the element 32, thereby raising the temperature of fresh air. .

As shown in FIG. 3, the upper and lower opposing two side surfaces of the heat exchanger 3 are connected to the intermediate portion of the vertical duct 29, and the left and right vertical side surfaces of the heat exchanger 3 are heated after heat exchange. Intake duct 3 for supplying fresh air to each of the dryers 1 described above
3 is connected. Each intake duct 33 has a bifurcated inlet side, and an open end of the bifurcated portion is connected to one side surface of the heat exchanger 3 adjacent to each other on the left and right.

In this embodiment, ten heat exchangers 3 are arranged in two rows in the depth direction (vertical direction in FIG. 2), of which four are arranged.
The pair of heat exchangers 3 are arranged in the vertical duct 29 in two upper and lower stages. Of the five intake ducts 33, the intake duct 33R located on the rightmost side in FIG. 2 is connected to the right side portion of the heat exchange device 25 and the pair of heat exchangers 3RU provided in the upper stage, and is located second from the right. The intake duct 33RR is the heat exchange device 2
A pair of heat exchangers 3RL provided on the rightmost side and the uppermost stage of 5
Is connected to the two upper and lower heat exchangers 3RU, 3
The RLs are arranged with their depth positions displaced.

On the other hand, the central intake duct 33M is a pair of heat exchangers 3 provided in the upper part of the central part of the heat exchange device 25.
Intake duct 3 located second from the left, connected to the MU
The 3LL is connected to a pair of heat exchangers 3ML provided at the center of the heat exchanger 25 and in the lower stage, and the upper and lower pairs of heat exchangers 3MU and 3ML are also arranged with their depth positions displaced, that is, the book. In the embodiment, the heat exchangers 3 are arranged three-dimensionally in a zigzag manner as described above, so that the heat exchangers 25 can be made compact and the adjacent heat exchangers 3 can take in fresh air without difficulty. ing.

Further, the outlet side of each intake duct 33 is connected to the intake motor 34 of each dryer 1, so that the fresh air supplied from the intake duct 33 to each dryer 1 is of the dryer 1. It is heated by the heater and is used for drying the laundry in the drying drum 6. In the dust collecting heat exchange facility of the dryer 1 having the above-described configuration, exhaust air containing dust discharged from the five dryers 1 is first sent to the dust collector 2 through each exhaust duct 7 and the transport duct 8. The dust is removed by the duct cage 14 in the dust collector.

Thereafter, exhaust air (warm air) from which dust has been removed
Is supplied to the lower duct 28 of the heat exchanging device 25 through the transport duct 24, and the vertical duct 2 between the upper and lower ducts 27, 28.
It is applied to each heat exchanger 3 when passing through 9. On the other hand, each heat exchanger 3 draws in fresh air from the vertical side and heats this air with the warm air to raise the temperature. The exhaust air after heat exchange is discharged from the exhaust port 30 of the upper duct 27 to the outside of the factory, while the air heated in each heat exchanger 3 is supplied to each dryer 1 through the intake duct 33. To be done.

In the above embodiment, the heat exchanger 3 is not limited to the cross flow type partition plate type, but may be a parallel flow type partition type, or a pipe type for bringing cold air into contact with a large number of hot air flowing pipes. Etc. can be adopted.

[0023]

As described above, according to the present invention,
Since the exhaust air discharged from the dryer is first applied to the dust collector, the heat of the warm air containing dust discharged from the dryer can be reused while preventing clogging of the heat exchanger, which in turn results in running costs at the linen factory. Can be reduced, and the maintenance for cleaning dust can be simplified.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing an outline of a dust collection heat exchange facility of a dryer.

FIG. 2 is a plan view of the equipment.

FIG. 3 is a side view taken along the line AA of FIG.

FIG. 4 is a side view taken along the line BB of FIG.

FIG. 5 is a perspective view of a heat exchanger.

[Explanation of symbols]

 1 Dryer 2 Dust collector 3 Heat exchanger 33 Air intake duct

Claims (2)

[Claims] 1. A dryer (1) for internally drying laundry.
After the warm air containing the dust discharged from the dust collector (2) is applied to the dust collector (2), the hot air from which the dust discharged from the dust collector (2) is removed is passed through the heat exchanger (3), and the heat exchanger (3 3.) A heat exchange dust collecting method for a dryer, characterized in that the air whose temperature has been raised by heat exchange with the warm air in (1) is supplied to the dryer (3). 2. A dryer (1) for internally drying laundry.
And a dust collector (2) for collecting the warm air dust discharged from the dryer (1), and the heat of the warm air from which the dust discharged from the dust collector (2) has been removed is converted into fresh air. The heat exchanger (3) to be exchanged, and the air heated by the heat exchange with the warm air in the heat exchanger (3) are heated in the dryer (1).
And a suction duct (33) for supplying the heat exchange dust collecting equipment of the dryer.