JPS6359077B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a heat exchange device for powder and granular materials, and more particularly to a heat exchange device that performs heat exchange while vibrating and floating the powder and granular materials.

Conventionally, when drying powder or granular materials by cooling or heating, for example, as shown in Fig. 1,
Heat exchange is performed while floating the particulate matter 51. A so-called fluidized bed type heat exchange device is used. In this heat exchange device, a particulate material 51 is placed on a grid-like floor 52 provided at the lower part of the device, and a gaseous heat exchange medium is blown into the device from the lower end of the device to suspend the particulate material. It was designed to exchange heat while

However, in such conventional heat exchange equipment, since the powder and granules are suspended by the heat exchange medium, the entire material is not suspended sufficiently, and therefore the heat exchange of the powder and granules is not uniform. I was afraid. In addition, when flammable powder and granular materials are in a high temperature state, there is a risk that the powder and granular materials will burn when air etc. comes into contact with the powder and granular materials. Since an inert gas such as gas is used, the running cost is relatively high. Furthermore, in the conventional example described above, it is difficult to perform heat exchange while continuously moving the powder and granules, and there is a limit to improving work efficiency.

The present invention has been made in view of the above-mentioned points.The present invention is made in view of the above-mentioned points, and is generally separated by a louver and vibrates the powder and grains placed on the trough to form a vibration transfer layer that floats on the trough. To provide a heat exchange device capable of uniformly and efficiently exchanging heat with the powdery material and continuously transporting the powdery material by contact with a heat exchanger disposed in a transfer bed. The purpose is to

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below based on embodiments of a vibration heat exchanger shown in the accompanying drawings.

The vibration heat exchange device shown in FIGS. 2 and 3 shows the first embodiment of the present invention, and this vibration heat exchange device is provided with a supply port 2 for raw material alone or raw material mixed gas at one end. A housing 1 is provided with a raw material discharge port 3 and a raw material mixed gas discharge port 4 at the other end, and reciprocating vibration is caused by a drive device 5 inside this housing 1, and this reciprocating vibration suspends powder particles. A trough 6 to be moved and a powder transfer chamber 8 having an air seal structure formed above the trough 6
and a heat exchanger 9 constituted by a large number of heat exchanger tubes 9a disposed within this powder transfer chamber 8.

The housing 1 is formed into a substantially rectangular parallelepiped shape, and a pair of supply ports 2 and a pair of discharge ports 4 are provided at both corners of the upper end of the side wall.
A raw material outlet 3 is provided at the bottom of the container.

A drive device 5 held by a frame 16 and a trough 6 which is vibrated by the drive device 5 are installed in the lower part of the housing 1. The frame 16 is supported on the bottom surface of the housing 1 by a vibration isolating spring 17 to prevent the housing 1 from resonating due to the vibration of the trough 6. Further, one side of the frame 16 protrudes laterally, and a drive motor 1 is mounted on the upper part of the frame 16.
8 is arranged, and the rotational motion of the drive motor 18 is converted into the vibrational motion of an operating shaft 19 connecting both side ends of the trough 6, for example, via an eccentric crank mechanism or the like. Note that this vibrational movement is such that the powdery material is accelerated in the direction of movement.

Therefore, the powder placed on the trough 6 is gradually transferred forward by the vibration of the trough 6.

The trough 6 includes a planar bottom plate 20 and a peripheral wall 21.
A discharge pipe 22 is attached to the front end of the bottom plate 20 for guiding the powder and granules transferred on the trough 6 to the raw material discharge port 3 of the housing 1. The upper part of the trough 6 is covered by a cover 7 provided on the upper part of the housing 1, and the cover 7 and the trough 6 form a powder transfer chamber 8. The transfer chamber peripheral wall 23 forming the lower end opening of this cover 7 is connected to the trough peripheral wall 21.
It is located inside.

Further, a substantially L-shaped seal receiving portion 10 is provided on the outer peripheral surface of the trough peripheral wall 21, and two grooves are formed in this seal receiving portion 10 by a seal portion inner wall 24. On the other hand, two hanging walls 12 are formed on the inclined wall 11 of the cover 7 in correspondence with the grooves,
With the seal receiving part 10 filled with liquid, the hanging wall 12
The tip of the is inserted into the groove. In this way, the vibration of the trough 6 is absorbed by the liquid in the seal receiving part 10 to prevent the vibration from being transmitted to the cover 7 and other non-vibrating parts, and the inside and outside of the powder transfer chamber 8 are prevented from being transmitted. It performs air sealing. Therefore, since outside air is not introduced into the powder transfer chamber 8, even when flammable powder or the like is cooled, the powder does not burn within the transfer chamber 8. A plurality of heat transfer tubes 9a are arranged in the powder transfer chamber 8 so that the heat transfer surfaces are optimally arranged according to the amount of heat transfer, and each of the heat transfer tubes 9a has a lower portion connected to a lower header. 37 and is connected at its upper part to an upper header 36 and to a steam drum 25 mounted above the housing 1 via a downcomer pipe 15 and a riser pipe 39. The heat exchange medium then exchanges heat with the powder particles moving on the trough 6 while circulating within the heat exchanger tube 9a.

In addition, louvers 26 are provided in the spaces in the upper part of the housing 1 that communicate with the powder transfer chamber 8 from the supply port 2 and the gas discharge port 4 provided in the housing 1, respectively.

Therefore, when the vibration heat exchanger configured as described above is used to cool and store the rubber powder in the combustion gas generated during the waste tire crushing process, the rubber powder is first stored in the waste tire crushing processing furnace 27. A waste tire is burned, and the generated high-temperature combustion gas is introduced into the vibration heat exchanger through a raw material supply port 2. The introduced combustion gas separates most of the rubber powder contained in the gas by the louver 26, and the gas moves along the inner wall of the upper surface of the cover 7, and circulates the cooling medium while reaching the exhaust port 4. It comes into contact with the surface of the heat transfer tube 9a and gradually becomes a low-temperature gas while exchanging heat with the cooling medium. Since the gas discharged to the outside from the discharge port 4 still contains unseparated rubber powder, it is caused to flow into the separator 28 connected to the discharge port 4 to separate and collect the unseparated rubber powder. do.

On the other hand, the rubber powder separated from the combustion gas by the louvers 26 naturally settles onto the trough 6 while remaining at a high temperature. In this way, the separated rubber powder is gradually piled up on the trough 6.
A layer of rubber powder having a substantially uniform thickness is formed on the bottom plate 20 of the trough 6 by the vibration of the trough 6. This layer thickness can be adjusted by changing the amplitude and frequency of the trough 6, and is adjusted to an effective layer thickness according to the amount of rubber powder processed, water content, etc. In this way, the rubber powder is formed as a vibratory transfer layer that moves on the trough 6 in only one direction. This vibration transfer layer moves while floating and repeatedly comes into contact with the heat transfer tube 9a through which the cooling medium circulates, and at this time, heat exchange is performed between the rubber powder and the cooling medium. The rubber powder moving on the trough 6 while being cooled is fed into a discharge pipe 22 provided at the tip of the trough 6, flows into a storage tank 29 connected to the raw material discharge port 3, and is stored. In addition,
Chilled water is mainly used as the cooling medium, and the cold water stored in the steam drum 25 is introduced into each heat transfer tube 9a via the downcomer pipe 15 and exchanges heat with rubber powder while reaching the upper header 36. The state changes to hot water. This hot water is then guided into the steam drum 25 via the riser pipe 39 and stored. At this time, the steam introduced together with the hot water is transferred to a steam separator 35.
After passing through the steam supply pipe 38, the steam is introduced into the processing furnace 2.
It is used to heat the heavy oil used for burning waste tires in 7. On the other hand, the hot water returned into the steam drum 25 is gradually cooled and guided to the downcomer pipe 15 again. In this way, the cooling water is circulated between the steam drum 25 and the heat exchanger 9 for use, but the insufficient amount, which is turned into steam and discharged to the outside, is returned to the steam drum 25 through the water supply pipe 14. will be replenished.

In addition, when the above-mentioned device is used as a drying device, a heating medium is circulated through the heat transfer tube 9a instead of a cooling medium, and heat exchange is performed between the powder and granules containing moisture to heat the granules. Dry by drying.

4 to 6 show a second embodiment of the vibration heat exchanger according to the present invention.

This embodiment has the same structure as the first embodiment except for the heat exchanger 9, and also has the same function. In this embodiment the heat exchanger 9
is composed of a hollow shaft 30 and a plurality of hollow disks 9b formed integrally with the hollow shaft 30. Further, a conduit 31 for guiding a heat exchange medium is arranged in the internal space of the hollow shaft 30 and the hollow disk 9b, and this conduit 31 is connected to a heat exchange medium introduction part 40 and a heat exchange medium discharge part 41 at both ends of the hollow shaft 30. , an inlet pipe 33 and an outlet pipe 34, respectively.
It communicates with

A plurality of heat exchangers 9 configured as described above are arranged at the lower part of the powder transfer chamber 8 so that the hollow disks 9b are arranged alternately in order to increase the efficiency of heat exchange. 23 by a bearing 45 so as to be rotatable. Note that the hollow shaft 30 is sealed with the transfer chamber peripheral wall 23 by a seal portion 46. Note that 47 is a bearing cover that covers the bearing 45 from the outside.

When the heat exchanger 9 in this embodiment performs heat exchange of powder and granules, the heat exchange medium supplied through the introduction pipe 33 is introduced into the heat exchanger 9 from the heat exchange medium introduction part 40, The hollow disc 9b is filled through the conduit 31 in the hollow shaft 30. Then, heat exchange is performed between this heat exchange medium and the powder passing through the outer surface of the hollow disk 9b, and the heat exchange medium is guided into the conduit 31 from the heat exchange medium introduction part 40.
The heat exchange medium is guided to a heat exchange medium discharge section 41 through a discharge introduction hole 32 opened in the hole and discharged out of the system.

In this embodiment, as shown in FIGS. 5 and 6, a sprocket 43 attached to the hollow shaft 30 of the heat exchanger 9 is connected to the disk drive device 42 via a drive chain 44. A plurality of other heat exchangers 9 are connected to each other by appropriate means, and the heat exchangers 9 are rotated by the rotational drive from the disk drive device 42 to increase the number of times the powder and granules come into contact with the heat exchange medium. This also makes it possible to improve the heat exchange rate.

FIGS. 7 and 8 show a third embodiment of the vibration heat exchanger according to the present invention, in which the heat exchanger 9 is constituted by a hollow plate 9c. This plate 9c is formed into an elongated shape along the length direction of the trough 6, and has a plate inlet 48 at both side ends for introducing the heat exchange medium into the inside of the plate 9c, and a plate inlet 48 for discharging the heat exchange medium to the outside of the system. A plate outlet 49 is provided. Further, in this embodiment, a plurality of plates 9c are arranged in the width direction of the trough 9, and the plate inlet 48 and plate outlet 49 of each plate 9c are communicated with each other.

Therefore, the heat exchange medium is introduced into the plate 9c through the plate inlet 48 and the hollow plate 9
After exchanging heat with the powder while flowing inside c, it is discharged from the system through the plate outlet 49.

FIG. 9 shows another example of application of the vibration heat exchanger according to the present invention. In this application,
Heat exchange work and sieving work of powder and granules are performed at the same time. Explaining based on FIG. 9, the bottom plate of the trough 6 has a double structure, and the lower bottom plate 20a has the same structure as that described in the above embodiment, but the upper bottom plate 20b has a double structure. The raw material outlet 3 side is formed with a screen 50. Therefore, the powder particles move while undergoing uniform heat exchange up to the middle of the trough 6, but the particles move through the screen 5.
0, small-diameter particles pass through the gap between the screens 50 and settle on the lower bottom plate 20a, and are separated into small-diameter and large-diameter particles from the respective raw material discharge pipes 22, 22'. It is possible to obtain powdered and granulated materials.

In addition, in all the embodiments described above, only one of the cooling medium or the heating medium is circulated in the heat exchanger 9 to cool or dry the powder, so-called one-system heat exchange. Although described above, the present invention is not limited to this,
Depending on the type of powder, so-called two-system heat exchange, in which drying and cooling are performed simultaneously, is also possible. That is, with respect to the moving direction of the powder and granular material in the apparatus, a drying heat exchanger is disposed in the front half, and a cooling heat exchanger is disposed in the rear half. Therefore, the powder containing moisture is first dried in the first half to a high temperature state, and then cooled in the second half before being carried out of the system.

The vibration heat exchange device according to the present invention can be used for various types of powder and granular materials, and for example, even sticky powder and granular materials can be used as long as they can be transferred on a trough.

Therefore, since the present invention is configured as explained above, the residence time of the powder and granular material on the trough is substantially uniform, and the contact between the heat exchanger and each particle of the powder and granular material is also substantially uniform. Therefore, uniform heat exchange can be performed even when there is a large difference in particle size or specific gravity between the particles. In addition, the powder on the trough forms a vibrationally moving layer, and each particle mixes vigorously and moves around within this vibrationally moving layer, making effective use of the contact area with the heat exchanger and improving thermal efficiency. can. Furthermore, the present invention has a structure in which the non-vibrating part does not resonate due to the vibration of the trough.
In addition to stable movement of powder on the trough, the air seal structure completely isolates the powder transfer chamber from the outside, making it ideal for cooling combustible powder at high temperatures. However, there is no longer any danger of combustion or explosion of powder particles.

[Brief explanation of drawings]

FIG. 1 is a schematic explanatory diagram showing one embodiment of a conventional heat exchange device, FIG. 2 is a front schematic explanatory diagram showing an embodiment of the vibration heat exchange device according to the present invention, and FIG.
A schematic side view of the vibration heat exchanger shown in the figure,
FIG. 4 is a schematic front view showing another embodiment of the vibration heat exchange device according to the present invention, FIG. 5 is a schematic side view of the vibration heat exchange device shown in FIG. 4, and FIG. FIG. 5 is a cross-sectional explanatory view showing the heat exchanger in the vibrating heat exchange device shown in FIG. Fig. 7 is a schematic plan view showing the arrangement of heat exchangers in the vibrating heat exchanger shown in Fig. 9, and Fig. 9 shows an embodiment of the vibrating heat exchanger having a sieving function in which the bottom plate of the trough has a double structure. It is a front schematic explanatory view shown. DESCRIPTION OF SYMBOLS 1... Housing, 2... Supply port, 3... Raw material carrying out port, 4... Discharge port, 6... Trough, 7... Covering body, 8... Particle transfer chamber, 9... Heat exchanger , 10
... Seal receiving part, 30 ... Hollow shaft.

Claims (1)

[Claims] 1. Supply port 2 for raw material alone or gas mixed with raw material at one end
A housing 1 is provided with a raw material discharge port 3 and a discharge port 4 for raw material mixed gas at the other end, and a drive device 5 is provided inside the housing 1 to horizontally move the raw material discharge port 3 toward the raw material discharge port 3. It is formed by a trough 6 that vibrates reciprocatingly in the direction and floats and moves powder particles by this reciprocating vibration, a cover 7 with a louver that covers the upper part of the trough 6, and the cover 7 and the trough 6. and a heat exchanger 9 disposed in a powder transfer chamber 8 having an air seal structure, and the powder supplied from the supply port 2 into the housing 1 is placed on the vibrating trough 6 through the louver. A vibratory transfer layer of the powder and granules is formed, and the powder and granules are transferred while exchanging heat through contact between the vibratory layer floating and moving due to vibration and the heat exchanger 9. A vibration heat exchange device featuring: 2 Inside the powder transfer chamber 8, a sealing material 13 is filled in a seal receiving portion 10 formed along the outer surface of the peripheral wall 21 of the trough 6, and a sealing material 13 is provided on the inclined wall 11 of the cover 7 in correspondence with the seal receiving portion 10. 2. The vibration heat exchanger according to claim 1, wherein the tip of the hanging wall 12 is sunk into the sealing material 13 to provide air sealing.