JP3525208B2 - Cooling device for high temperature powder - Google Patents

Description

Detailed Description of the Invention

[0001]

The present invention relates, in producing the pellets, for example using an extruder, cooling the hot powder and granular material pellets or the like which is hot cut into pellets at the die exit
Regarding the device .

More specifically, the hot cut method is known as one method of pellet production by the extrusion method. In this method, immediately after the thermoplastic molten material is extruded into a thin rod shape by an extruder, a semi-molten state thin rod-shaped body extruded from the die outlet is formed into a pellet of a desired size at the die outlet. It is cut by a cutter when it is hot, and in this case, the cut pellets may be fused with each other. Therefore, in order to prevent this, it is necessary to cool after cutting.
In such a case, the present invention is used.

[0003]

2. Description of the Related Art Conventionally, as shown in FIGS. 12 to 15, an apparatus for cooling pellets in a plastic pellet manufacturing process has been known. 12 is a front view,
13 is an end view of the X-X line of FIG. 12, FIG. 14 is a right side view,
FIG. 15 is a plan view.

The conventional pellet cooling device will be described below with reference to FIGS. This pellet cooling device includes a support base 01 to which a caster 02 that can move on the floor surface is attached, and a cylindrical shape that is swingably supported by a buffer spring on the support base 01 and that is vertically provided. A cylindrical frame 03, and a high temperature powder M such as a high temperature pellet provided in the up and down direction so as to surround the frame 03.
And a spiral trough 04 for transferring from above to below,
A spiral cooling water pipe 05 that is provided integrally with the spiral trough 04 along the lower surface of the spiral trough 04 and that supplies the cooling water W from below to above, and the upper end of the frame 03. A motor base 06 is fixed to the motor base 06, and a vibrating means 07 composed of a Eurus motor (trade name) 08 provided on the motor base 06 and a cooling water drain pipe communicating with the spiral cooling water pipe 05 and discharging the cooling water W. 09 and so on.

In FIGS. 12 and 15, reference numeral 010 is an inlet for a high temperature pellet to be cooled during pneumatic transportation. 12
14 and 15, reference numeral 012 is a jack bolt, reference numerals 013 in FIGS. 12 and 14 are wire mesh air vents during air transportation, 014 is a cooling water supply port, 015 is a drain port, and 016 is a cooled pellet. It is the outlet of. Figure 1
2 and FIG. 15, reference numeral 017 is a connecting gear, and 018 is a hanging eyebolt.

When cooling the high-temperature pellets, the high-temperature pellets M to be cooled are charged from the high-temperature pellet inlet 010, and the vibration by the vibrating means 07 vibrates the frame 03 in the rotational direction while moving up and down. At the same time, the cooling water W is supplied from the cooling water supply port 014 to the spiral cooling water pipe 05. Then, as shown in FIG. 13, the high temperature pellets M supplied to the spiral trough 04 are cooled by the cooling water W in the spiral cooling water pipe 05, and are vibrated by the vibrating means 07 to vibrate the frame 03 and the spiral trough. 0
4 and the spiral cooling water pipe 05 are also vibrated together, and the high temperature pellets are transferred from the lower side to the upper side while preventing fusion due to the vibrating action. At this time, the high temperature pellets M are cooled by the cooling water W in the spiral cooling water pipe 05 while moving from the lowermost part to the uppermost part of the spiral trough 04,
The cooled pellets are discharged from the pellet discharge port 016. The cooling water W is discharged from the drain port 015 through the cooling water discharge pipe 09.

[0007]

However, in the pellet cooling device of the above-mentioned conventional example, since the spiral trough 04 has a structure in which the upper portion is opened, dust from the material is scattered during cooling of the high temperature pellet (material). However, this has been a cause of pollution of the factory environment, and there has been a problem that foreign materials are mixed or adhered to the material.

Since the mechanical vibrating means 07 vibrates the spiral trough 04 or the like to transfer the material, the mechanical fatigue and deterioration of the components progress due to the vibration.
It is necessary to periodically adjust the vibration generating mechanism and replace the parts, which is a troublesome maintenance management.

Since the pellet cooling device of the above-mentioned conventional example can be conveyed only in the vertically upward direction, when it is arranged at a position apart from the pellet manufacturing device (pelletizer) or the weighing device in the next process, the devices are separated from each other. There is a problem that a transport device such as an air transport device is separately required.

The present invention has been made in view of these problems, and uses an air transportation device as a means for transporting high-temperature powder or granules such as pellets manufactured by a pellet manufacturing apparatus to the next step, midway in the flow tank and connect the air transport path of the air transport system, while the high-temperature powder or granular material to be cooling cooled by the flow vessel and the pneumatic transportation path (mainly pipeline), following step The method of conveying by air is adopted . That is, the high-temperature granular material to be treated is not only cooled while being transported by the energy of the air in the air transportation path, but also fluidized in the fluid tank connected in the middle of the air transportation path. by cooling while, high
The purpose of the present invention is to further improve the cooling ability of the warm powder and granular material .

[0011]

In order to solve the above problems, the invention according to claim 1 of the present invention is such that an air transport pipe having a rising part in the middle and a base end side of this air transport pipe are connected. An air source for pneumatically transporting the high-temperature powder in the air-transporting pipe, a high-temperature powder-supplying pipe connected to a position upstream of the rising portion of the air-transporting pipe, and a high-temperature powder provided in the rising portion. Cooling equipment for high-temperature powder and granules, which consists of a fluidized tank with an enlarged pipe diameter to stay and cool while flowing.
In location, said flow Doso includes a tubular body portion of the maximum tube inner diameter, is connected between the upper end of the lower end portion of the barrel body and the upstream air transport pipe, and an inner diameter tube toward the bottom to top A substantially inverted conical portion that is gradually increased, and a substantially conical portion that is connected between the upper end of the body portion and the lower end of the downstream side air transport pipe, and that has a gradually decreasing pipe inner diameter from the lower part to the upper part, It is characterized in that the body portion is provided with a plurality of fins.

[0012] Here, high temperature powder or granular material to be cooled which is supplied from the base end side of the transportation flue (e.g. hot cut pellets and the like at the outlet of the die of the pellet manufacturing apparatus), the air force from the air source While being transferred, the heat is exchanged with the transportation air flow to be cooled.

The flow tank is a pneumatic transportation line (transportation pipe).
Since it is provided in the rising part of the fluidized bed part, when the high temperature granular material flows in together with the air from the lower part of the fluidized bed part, the air flow velocity sharply slows down, so the flow velocity of the high temperature granular material also suddenly stalls from the air transport region. The material particles are suspended in the air to form a so-called fluidized bed in which the material particles and the air are mixed.
The hot granules are heat-exchanged with the air flow while temporarily staying in the fluidized bed to be cooled in earnest.

The high temperature powder particles cooled in the fluidized bed portion are pneumatically transported downstream from the fluidized bed portion while being cooled by an air flow. In this case, cooling already hot granular material discharged from the fluidized bed unit, after cooling treatment to near room temperature to further, preferably discharged out of the system. The cooling at this time is in consideration of workability in the post process such as bagging of products (eg, pellets).

In the present specification, the term "residence in the fluidized vessel" refers to a phenomenon in which high-temperature powdery particles are temporarily retained in the fluidized vessel and are transferred downstream after a lapse of time.

The fluidizing tank is for temporarily retaining the fluidized high-temperature powder and granules sent from below while exchanging heat and cooling, and has a diameter (inner diameter) larger than the diameter (inner diameter) of the pipe of the pneumatic transportation line ( The structure is not particularly limited as long as it has an inner diameter), but it is preferable to provide fins in the flow tank to increase the heat dissipation area because heat exchange is improved and cooling capacity is improved. Further, the inside of the fluidized tank can be cooled by an air-cooling system that cools only by an air flow, or by a system that uses both a water-cooling system that cools through cooling water and an air-cooling system.

[0017] That is, specific examples of the fluidizing tank, billed
As in claim 1 Symbol placement, the flow tank, a tubular body portion of the maximum tube inner diameter, is connected between the upper end of the lower end portion of the barrel body and the upstream air transport tube and directed from bottom to top It is composed of a substantially inverted cone part with a gradually increasing pipe inner diameter, and a substantially conical part connected between the upper end of the body part and the lower end of the downstream side air transport pipe and having a gradually decreasing pipe inner diameter from the lower part to the upper part. An example is one in which a plurality of fins are provided in the body portion.

According to a second aspect of the present invention, an air transport pipe having a rising part in the middle thereof and an air source connected to the base end side of the air transport pipe for pneumatically transporting the high temperature powder or granular material in the air transport pipe. And a high-temperature powder supply pipe connected to a position upstream of the rising portion of the air transport pipe, and a pipe diameter enlarged for staying and cooling while flowing the high-temperature powder provided in the rising portion and flowing. The flow tank comprises a tubular body having a maximum inner diameter, a lower end of the body and an upper end of the upstream air transport pipe, and a bottom to an upper portion. It is composed of a substantially inverted cone part with a gradually increasing pipe inner diameter, and a substantially conical part connected between the upper end of the body part and the lower end of the downstream side air transport pipe and having a gradually decreasing pipe inner diameter from the lower part to the upper part. , The body is provided with a plurality of fins and cooling water is provided. It is characterized in that is provided with a cooling means for passing water. In this case, the fluidized tank uses both an air-cooled type and a water-cooled type for cooling, and has a higher cooling capacity than that of the air-cooled type alone.

[0019] Specific examples of the fluidization vessel using a combination of air-cooled and water-cooled, as in claim 3 Symbol placement, the body portion of the flow tank,
A tubular outer jacket and an inner tube that forms a first cooling water passage with the inner peripheral wall of the outer jacket are formed, and the inner tube is provided with a plurality of fins at intervals in the vertical direction, A central tube is extended from the bottom of the central portion of the body to the outside of the side wall of the substantially conical portion, and a water injection tube having a small outer diameter is inserted into the central tube, and an inner wall of the central tube is inserted. A second cooling water passage is formed between the cooling water and the outer wall of the water injection tube, and the cooling water injected from the water injection tube is discharged from the cooling water outlet of the central tube through the second cooling water passage, It is possible to employ one having a plurality of fins provided at intervals on the outer side in the vertical direction.

In the case of claims 1 to 3, it is preferable that the air source and the air transportation pipe are provided with air volume adjusting means for adjusting the number of revolutions of the air source to regulate the amount of air sent into the air transportation pipe. <br/> favored arbitrariness. By this air volume adjusting means, maintained since the appropriate blowing rate correspond to those of a high temperature powder or granular material to be cooled different specific gravity is obtained, stable cooling capacity can also proper fluidity cooling materials having different specific gravity it can.

Here, as the air volume adjusting means, as shown in the embodiment described later, it comprises a Pitot tube, a differential pressure transmitter, a pressure indicating controller, an inverter and an air source operating motor,
Based on the dynamic pressure detected by the Pitot tube, the number of revolutions of the air source is finally adjusted via the air source actuating motor to appropriately adjust the amount of air flowing through the aerodynamic transportation line. Other configurations can also be employed.

A downstream side air transport pipe is connected to the outlet formed in the flow tank, and a dust collector having an exhaust port is connected to the tip of the downstream side air transport pipe. Is connected to a hopper adapted to introduce air from a secondary cooling air source into the room through a blower pipe, and the cooled material sent to the room of the hopper is supplied to the secondary cooling air source. Furthermore Write a configuration which is adapted to cool (請Motomeko 4 see) by the blowing from the preferred. With this configuration, it is possible to cool the room to a temperature close to the room temperature.

In [0023] In the above case, the exhaust port of the dust collecting device, is possible to use a construction in which the front end portion for connecting the base end portion of the circulation pipe which is connected to a suction side of the air source (claim 5 see) it can. With such a configuration, when the high-temperature powder to be cooled does not like to be oxidized, an inert gas such as nitrogen gas can be circulated and used.

[0024]

The operation of the present invention will be described below, taking as an example the case of cooling high-temperature plastic pellets (high-temperature powder particles) produced by the hot cut method. When the air source is operated to supply compressed air into the air transportation pipe, while the high temperature pellets continuously discharged from the pelletizer are supplied into the air transportation pipe from the high temperature granular material supply pipe, the high temperature pellet is generated from the air source. The air flow having the outside air temperature is used to transport the air through the air transport pipe into the fluidized tank. At this time,
The high temperature pellets are transported in the air transport tube by an air flow having an outside air temperature, and are heat-exchanged with the high temperature heat of the air flow and the high temperature pellets themselves to lower the temperature and cool a little.

Next, when the slightly cooled high-temperature pellets reach the inside of the flow tank, the pipe diameter of the flow tank, that is, the inner diameter is made larger than the inner diameter of the air-transporting pipe, so that the high-temperature pellets are transported by air. The flow velocity of pellets is air in the same flow tank.
Due to the rapid decrease in flow velocity, the flow stalls and floats, forming a fluidized bed. While the high temperature pellets temporarily stay in the fluidized bed while being in contact with the air flow, the high temperature pellets are heat-exchanged with the transport air flow constantly supplied at the outside air temperature in the fluidized tank to be cooled in earnest. .

At this time, fins are provided in the flow tank .
Since the heat dissipation area is increased, the heat exchange rate is increased and the cooling capacity is improved. Further, according to the configuration in which the cooling water is passed together with the fins in the fluidized tank, the cooling capacity is further enhanced.

The outlet downstream air transport tube is connected to the tare order of fluidization vessel, similar to the action of the air transport tube to the fluidization vessel (i.e. upstream air transport tube) has an air source as described above,
The high-temperature pellets that have been cooled in a full-scale in the fluidized tank are further transported by the air stream at the outside air temperature constantly supplied in the downstream air transport pipe, and are further heat-exchanged with the heat of the air stream and the high-temperature pellets themselves. A little cooled. A dust collector is connected to the tip of the downstream air transport pipe, a hopper is connected to the lower part of the dust collector, and the outside air is blown from the secondary cooling air source into the chamber of this hopper, the outlet of the hopper. The cooled high temperature pellets discharged from are cooled to near the outside air temperature.

When the air volume adjusting means is provided, the air volume sent into the air transport pipe can be adjusted by adjusting the rotation speed of the air source, so that an appropriate air flow rate corresponding to the specific gravity of the material to be cooled can be obtained. As a result, a proper continuous fluidized bed can always be formed in the fluidized tank, and a stable cooling capacity can be maintained.

[0029]

The first example in the form status of implementation of the embodiment of the present invention with reference to FIGS. 1 to 4 will be described below. 1 is a schematic configuration diagram of the whole, FIG. 2 is a partial vertical sectional view of the flow tank in FIG. 1, FIG. 3 is a sectional view taken along the line AA of FIG. 2, and FIG. 4 is a bottom view.

In this embodiment, a hot-cut plastic pellet is used as an example of the high-temperature powder, and an apparatus for cooling the high-temperature pellet by air cooling is shown.
That is, as shown by the solid line in FIG. 1, the cooling device 1 for this high-temperature powder or granular material (high-temperature pellet) has an air transport pipe 2 having a rising portion 2a in the middle and a base end of this air transport pipe 2. Connected to the side of the air transport pipe 2 for transporting the high temperature powder or granular material by an air flow, and an air source 3 such as a blower or a compressor, and a high temperature connected to a position upstream of the rising portion 2a of the air transport pipe 2. The powder and granular material supply pipe 5 and the fluid tank 1 which is provided in the rising portion 2a and has an enlarged pipe diameter (inner diameter) for staying and cooling while flowing the high temperature powder and granular material.
It consists of 0.

The air transport pipe 2 is provided with a rising portion 2 provided midway.
With a as the boundary, the base side is the upstream air transport tube 2A, and the tip side is the downstream air transport tube 2B. Further, the air source 3 not only transports the high temperature powder and granules by the air flow but also forms a continuous fluidized bed in the fluidized tank 10.

A branch chute 6 is connected to the upper end of the high-temperature powder and granular material supply pipe 5 to select the high-temperature powder and granular material into good products and defective products. The branch chute 6 can be switched between a good product outlet 6b and a defective product outlet 6c by a switching valve 6a. To the inlet 6d of the branch chute 6, high-temperature powder particles (pellets) that are hot-cut with a cutter are supplied from a pelletizer 7. The lower end of the high-temperature powder supply pipe 5 is connected to the upstream air transport pipe 2A, and a rotary feeder 8 driven by a motor 9 is connected in the middle of the high-temperature powder supply pipe 5. It is measured and supplied to the upstream side air transport pipe 2A.

The fluidized tank 10 is, as shown in FIGS.
A tubular body portion 11 having a maximum pipe inner diameter, and the body portion 11
Between the lower end 11a and the upper end of the upstream air transport pipe 2A, and a substantially inverted conical portion 12 having a pipe inner diameter gradually increased from the lower part to the upper part, and the upper end 11b of the body part 11 and the downstream air. A plurality of fins 14 are provided on the body portion 11, which is connected between the lower ends of the transport pipes 2B and has a substantially conical portion 13 whose pipe inner diameter is gradually reduced from the lower portion to the upper portion. However, all the fins 14 provided on the outer periphery of the body portion 11 project outward from the body portion 11 so that they can contact the outside air.

The flange 15 formed at the upper end of the upstream side air transport pipe 2A and the flange 16 formed at the lower end of the substantially inverted conical portion 12 are fixed by a bolt 17 and a nut 18, and 19 is inserted through the bolt. It is a hole. Further, the flange 20 formed at the lower end of the downstream air transport pipe 2B and the flange 21 formed at the upper end of the substantially conical portion 13 are fixed by the bolts 22 and the nuts 23 in the same manner as described above. In FIG. 2 and FIG. 4, reference numeral 24 is a support piece for supporting the flow tank 10 on a mount (not shown) with bolts and nuts (not shown).
Is a bolt insertion hole.

The plurality of fins 14 ... 14 have a structure as shown in FIGS. That is, the body portion 11 serving as an outer case and the central cylinder 26 that is provided inwardly of the body portion 11 and hangs down to the center portion are provided. The body portion 11
Is a plurality of plate-shaped fins 14 vertically spaced apart.
.. are integrally formed or welded, and the outer peripheral edge portion 14 b of the fin 14 is projected outward from the body portion 11. Further, a plurality of plate-shaped fins 14 ... 14 are vertically provided at intervals on the outer wall surface of the central cylinder 26 toward the circumferential wall surface of the body portion 11.

An upper flange 11c extends outward from the upper end 11b of the body portion 11, and the upper flange 11c is provided.
Is a lower flange 13a formed at the lower end of the substantially conical portion 13.
It is fixed with a bolt 27 and a nut 28. Further, the upper end of the central cylinder 26 is vertically provided on a rib piece (not shown) integrally formed in a rib shape on the horizontal line of the upper flange 11c. The lower end portion 11a of the body portion 11 is placed on an outwardly facing upper flange 12a formed at the upper end portion of the substantially inverted conical portion 12.

In the first embodiment of the present invention, the high-temperature powder particles to be cooled are cooled by air while being transported by the upstream air transport pipe 2A, and then the material sent from the inlet 10a of the fluidized tank 10 is supplied. Fins 14 while being cooled by air in earnest
… After heat exchange at 14 , finally the downstream side air transport pipe 2
It is configured to be cooled by air while being transported to a destination such as a receiver at B.

Instead of the above structure, as shown by the alternate long and short dash line in FIG. 1, the dust collector 50 having an exhaust port 51 at the tip of the downstream side air transport pipe 2B connected to the outlet 10b of the flow tank 10. The air from the secondary cooling air source 62 is connected to the lower part of the dust collector 50 through the air blow pipe 63 and the room 6
It is also possible to adopt a configuration in which a hopper 60 adapted to be introduced into No. 1 is connected, and the cooled material (high-temperature powder or granular material) sent into the chamber of the hopper 60 is further cooled by the blowing.

According to this structure, the material supplied to the hopper 60 can be cooled to a temperature close to the outside air (room) temperature before being discharged from the hopper outlet 64. In FIG. 1, 65 is an intake filter, 6
6 is a motor for driving the secondary cooling air source 62, 67 is a discharge valve for discharging an arbitrary amount of the material in the hopper 60, 68
Is a level gauge for detecting the fullness of the material in the hopper, 69,
70 is a thermometer for measuring the temperature of the material in the hopper 60,
Reference numeral 71 is a control panel for the entire cooling device for high-temperature powder particles shown in FIG. 1, 72 is a weighing machine for weighing the discharged material, and 73 is a storage bag for storing the material.

As shown in FIG. 1, the dust collector 50 is of a known type, and has an exhaust filter 53 suspended in the accommodation chamber 52. With this exhaust filter 53, the air source 3 and the secondary filter are provided. The exhaust gas and dust, etc., which have been supplied by the cooling air source 62 and have been used, are cleaned, and the clean gas is discharged from the exhaust port 51 to the outside of the system. When cleaning dust and the like adhering to the exhaust filter 53, compressed air is supplied from above the exhaust filter 53 from a compressed air source 54 for cleaning. 55 is a solenoid valve.

In FIG. 1, the exhaust port 51 of the dust collector 50
The exhaust gas discharged from the exhaust port 51 can be reused by connecting the intake air filter 30 of the air source 3 with a pipe (not shown). Instead of pure air, an inert gas such as nitrogen gas can also be used.

A second example of the embodiment of the present invention is shown in FIGS. 5 and 6.
It will be described below based on. FIG. 5 is a schematic configuration diagram of the whole,
FIG. 6 is an enlarged view of the control circuit of the air volume adjusting means.

The cooling device for high-temperature powder particles according to the second embodiment is the cooling device according to the first embodiment to which the air volume adjusting means 4 is added, and the other structure is the first. Since they are the same as those of the example embodiment, the same reference numerals are used for the common configurations of both of them for convenience.

The air volume adjusting means 4 comprises a rectifying tube 41, a total pressure Pitot tube 42, a static pressure Pitot tube 43, a differential pressure transmitter 44, a pressure indicating controller 45, an inverter 46 and a motor 47 for driving the air source 3. The constant air volume control circuit
The speed of rotation is changed to adjust the amount of air sent into the air transport pipe 2.

Here, the rectifying pipe 41 rectifies the air flow in order to detect the dynamic pressure of the air flow in the pipe, and the rectifying pipe 41 includes a total pressure pitot pipe 42 and a static pressure pitot pipe 43 as a sealing material. It is attached airtightly via 48. The dynamic pressure, which is the differential pressure between the total pressure detected by the total pressure pitot tube 42 and the static pressure detected by the static pressure pitot tube 43, is detected. The detected dynamic pressure is converted into an electric signal by the differential pressure transmitter 44 and output. The electric signal output from the differential pressure transmitter 44 is a pressure indicating controller 45.
Entered in. The pressure indicating controller 45 outputs an electric signal that is controlled so that the input dynamic pressure of the air flow in the pipe matches with an arbitrary set value. Pressure indicating controller 4
When the control electric signal output from the controller 5 is input to the inverter 46, the inverter 46 outputs a three-phase AC power source having a frequency proportional to the control electric signal to output the motor 47.
It is possible to change the rotation speed of the air source 3 via the and to make the amount of air sent into the air transport pipe 2 constant. The rectifying pipe 41 has its flanges 41A, 41B and the flanges 2b, 2c of the upstream side air transport pipe 2A flange-connected, but can also be connected by other means such as a crank band.

The air volume adjusting means 4, that is, the constant air volume control circuit,
It utilizes the fact that there is a fixed relationship between the dynamic pressure of the air flow and the air flow velocity. At the time of test operation, the air source 3 is used so that a continuous fluidized bed of high-temperature powder or granules (pellets) is appropriately formed in the fluidized tank 10 by using the air volume adjusting means 4.
Adjust the flow rate of air generated in. That is, the dynamic pressure at the optimum air flow rate (flow velocity) obtained by the adjustment during the test operation is set in the pressure indicating controller 45. As a result, due to fluctuations in the pellet production amount during the pellet manufacturing operation, types of high-temperature particles to be cooled, clogging of the intake filter 30 and the exhaust filter of the dust collector described later, etc. Even if a load fluctuation occurs and the air flow rate (flow rate) fluctuates, the air volume adjusting means 4 causes the air source 3 to automatically reach the optimum air flow rate (flow rate) at the time of trial operation.
Since the drive rotational speed is controlled, a predetermined air volume is constantly supplied, and a continuous fluidized bed of high temperature powder and granules in the fluidized tank 10 is stably formed. As a result, the high-temperature powder and granules are temporarily retained in the fluidized tank 10 for heat exchange and are cooled in earnest.

When the load variation on the air source 3 exceeds the controllable range by the air volume adjusting means 4, an alarming means such as a buzzer or a lamp is incorporated in the constant air volume control circuit.

A third example of the embodiment of the present invention is shown in FIGS.
It will be described below based on 0. 7 is a schematic configuration diagram of the whole, FIG. 8 is a partial vertical sectional view of the flow tank in FIG. 7, FIG. 9 is a sectional view taken along line BB of FIG. 8, and FIG. 10 is a bottom view.

In the cooling device for high-temperature powder particles according to the third embodiment, the structure of the fins and the main body of the fluidized tank is different from that of the fluidized tank 10 in addition to the air cooling type, and the other structure is shown by the chain line in FIG. The dust collector 50, the hopper 60, and other reference numerals 51 to
It is similar to that of FIG. 5 with 55, 61-73. Therefore, the same components as those of the device of the second embodiment use the same reference numerals for convenience.

That is, the air transport pipe 2 having the rising portion 2a in the middle thereof, and the air source 3 connected to the base end side of the air transport pipe 2 for pneumatically transporting the high temperature powder and granules in the air transport pipe 2.
And an air volume adjusting means 4 for adjusting the rotational speed of the air source 3 to adjust the amount of air sent into the air transport tube 2, and a high temperature powder supply connected to a position upstream of the rising portion 2a of the air transport tube 2. It comprises a pipe 5 and a fluid tank 10 which is provided in the rising portion 2a and has an enlarged pipe diameter in order to stay and cool the high temperature powder particles while flowing, and the fluid tank 10 comprises:
A tubular body portion 11 having a maximum pipe inner diameter, and the body portion 11
Between the lower end 11a and the upper end of the upstream air transport pipe 2A, and a substantially inverted conical portion 12 having a pipe inner diameter gradually increased from the lower part to the upper part, and the upper end 11b of the body part 11 and the downstream air. It is composed of a substantially conical portion 13 which is connected between the lower end portions of the transport pipe 2B and whose pipe inner diameter is gradually reduced from the lower portion to the upper portion. The body portion 11 is provided with a plurality of fins 14 and the cooling water is passed through. The cooling means 80 for this purpose is provided.

Further, the outlet 10b formed in the flow tank 10
Is connected to a downstream air transport pipe 2B, a dust collector 50 having an exhaust port 51 is connected to the tip of the downstream air transport pipe 2B, and a lower part of the dust collector 50 for secondary cooling is connected. The air from the air source 62 is supplied to the room 6 through the blower pipe 63.
1 is connected to the hopper 60, and the cooled material sent into the chamber of the hopper 60 is further cooled by blowing air from the secondary cooling air source 62.

In the above structure, the detailed structure of the flow tank 10 will be described below with reference to FIGS. Flow tank 1
The body portion 0 of 0 has a cylindrical outer jacket 81 and an inner peripheral wall 82 of the outer jacket 81, and a first cooling water passage 83.
And the inner cylinder 25 forming the. As shown in FIG. 8, cooling water is introduced into the first cooling water passage 83 from a cooling water inlet 84 formed in the lower side wall of the outer jacket 81,
The water is discharged from a cooling water outlet 85 formed on the upper side wall of the outer jacket 81 so that it can be circulated for use. In FIG. 8, reference numerals 86 and 87 denote short pipes welded or integrally formed with the outer jacket 81 to form the cooling water inlet 84 and the cooling water outlet 85. The short pipe 86 is connected to a cooling water source via a conduit. At the same time, the short pipe 87 is connected to the cooling water source through a conduit so that the cooling water can be circulated and used. However, it is also possible to use the one-pass type without circulating the cooling water without connecting the short pipe 87 side to the cooling water source.

An upper flange 25a and a lower flange 25b are extended outward at the upper end of the inner cylinder 25. The lower flange 25b is supported by the upper end 81a of the outer jacket 81 and fixed by welding or the like. The flange 25a is fixed to the lower flange 13a formed at the lower end of the substantially conical portion 13 with a bolt 27 and a nut 28.
The lower end portion 25c of the inner cylinder 25 is placed on the outwardly facing upper flange 12a formed at the upper end portion of the substantially inverted conical portion 12 and fixed by welding or the like. A lower end portion 81b of the outer jacket 81 is placed on the upper flange 12a and fixed by welding or the like.

A plurality of plate-shaped fins 14 ... 14 are integrally formed or welded to the inner cylinder 25 at intervals in the vertical direction. The fin 14 has an outer peripheral edge portion 14b and an outer peripheral surface 25d of the inner cylinder 25. Are separated from the inner peripheral wall 82 of the outer jacket 81 so as to form a first cooling water passage 83.
The insides of the fins 14 ... 14 are exposed to the inside of the inner cylinder 25 so that the fins 14 ... 14 take heat from the high temperature powder particles by contacting with the high temperature powder particles supplied from below. I am doing it.

In this case, the outer peripheral edge portions 14b of the plurality of fins 14 ... 14 provided on the inner cylinder 25 face the inside of the first cooling water passage 83 as shown in FIGS. 8 and 9. In addition, it projects from the outer peripheral surface 25d of the inner cylinder 25. As a result, each fin 14 efficiently absorbs heat from the cooling water to improve heat exchange and efficiently cool the high-temperature powder or granular material.

A central tube 90 extends from the bottom of the center of the body portion 11 to the outside of the side wall of the substantially conical portion 13. That is, the lower end of the central tube 90 serves as a water reservoir 91, and the upper portion is bent so as to project outward from the tube insertion hole 13b formed in the side wall of the substantially conical portion 13, and a cooling water outlet is provided at a part of the projecting portion. 92 is formed.

In addition, the outer diameter of the central tube 90 is smaller than that of the central tube 90, and an opening 96 is formed at the lower end.
A flange 93 of the central tube 90 having an upper end
A water injection tube 95 having a flange 97 that is flange-connected with is inserted. Inner wall 9 of the central tube 90
0a and the outer wall 95a of the water injection tube 95, a second cooling water passage 99 is formed, and the cooling water inlet 9 of the water injection tube 95 is formed.
The cooling water injected from 8 passes through the water injection tube 95 and is discharged from the cooling water outlet 92 of the central tube 90 through the second cooling water passage 99. Further, a plurality of plate-shaped fins 14 ... 14 are radially provided at intervals in the vertical direction outside the vertical portion of the central tube 90 avoiding the vicinity of the bent portion.

In FIG. 7, reference numeral 88 is a float switch for detecting a decrease in the amount of cooling water and water interruption, and 89a and 89b are valves.

When the present inventor conducted an experiment using the cooling device for high temperature powder and granules according to the third embodiment, high temperature pellets having an initial temperature of 160 ° C. were put into the dust collector 50. At this point, the effect of cooling to about 60 ° C. was obtained. Further, the following phenomenon was observed in the experimental example in the embodiment of the third example. That is, the inlet 10 of the flow tank 10
The high temperature pellets introduced from a form a fluidized bed inside the fluidized vessel 10, and the fluidized bed is the outlet 10b of the fluidized vessel 10.
When it grows up to the vicinity, a part of the upper part thereof is jetted downstream from the outlet 10b, and the length of the fluidized bed is temporarily reduced. Thereafter, since the high temperature pellets are continuously pneumatically transported into the fluidized tank 10 through the inlet 10a, the fluidized bed of the high temperature pellets grows up to near the outlet 10b again. In this way, the fluidized bed of high temperature pellets is continuously maintained while repeating growth and contraction.

The cooled pellets jetted from the outlet 10b of the fluidized tank 10 are pneumatically transported in the downstream air transport pipe 2B and supplied into the dust collector 50. Then, the cooled pellets are further cooled in the hopper 60 to a temperature close to the room temperature.

A fourth embodiment of the present invention will be described below with reference to FIG. FIG. 11 is an overall schematic configuration diagram similar to FIG. As shown in FIG. 7, the cooling device for the high temperature powder and granules shown in FIG.
The exhaust port 51 of the dust collector 50 is different in that the base end 112 of the circulation pipe 110 having the front end 111 connected to the suction side of the air source 3 is connected, and other configurations are shown in FIGS. It is the same as that of the third embodiment shown in FIG. Therefore, the same components are designated by the same reference numerals as those in FIGS.

With this configuration, as described above,
An inert gas such as nitrogen gas can be used as a medium for transporting and cooling the material.

The air volume adjusting means 4 is the same as that shown in FIGS.
It is also possible to adopt the configuration omitted in.

According to an embodiment of the [0064] present invention, the air transport tube hot granular body to be cooled by not only cooling while transporting air stream, setting digits flow rising portion of the air transport tube Doso In the inside, since the high temperature powder and granules are configured to be cooled in earnest while flowing, for example, between the high temperature powder and granules manufacturing apparatus such as a pelletizer and the next step such as a weighing device, the high temperature powder and granules of the present invention are provided. By installing the body cooling device, the high-temperature powder particles can be cooled during the transportation to the next step, and it is not necessary to provide a dedicated transportation device between the respective devices unlike the conventional example. In addition, unlike the conventional example, dust is prevented from scattering or foreign matter is mixed in during cooling of the high-temperature powder or granules, and the vibration generating mechanism of the conventional example is not required, which is troublesome maintenance management. Disappears.

Further , when the air source and the air transport pipe are provided with an air volume adjusting means to control the driving rotational speed of the air source, a stable air volume is supplied corresponding to, for example, high temperature powder particles having different specific gravities. As a result, a continuous fluidized bed of high-temperature powder or granules is stably formed in the fluidized tank, so that the high-temperature powder or granules can be cooled in the fluidized tank in a stable manner.

[0066]

According to the invention of claim 1, the embodiment
In addition to the above advantage, since a plurality of fins are provided in the body portion of the fluidized tank, the fins widen the contact area of the high-temperature powder or granular material, that is, the heat radiation area to improve heat exchange. Therefore, the cooling capacity is improved.

According to the second aspect of the present invention, since the fluidized tank uses both the air cooling type and the water cooling type for cooling, the cooling capacity is further improved as compared with the air cooling type alone. The fluidized bed using a combination of air-cooled and water-cooled, if such claims 3 Symbol mounting arrangement, the flow tank compact can be manufactured.

According to the invention of claim 4 , by cooling the cooled material to a temperature close to the room temperature,
For example, there is an advantage that post-process work such as bagging of products such as pellets is easy. Further, since the exhaust gas, dust, and the like are collected by performing the dust collection process, environmental pollution can be prevented.

According to the fifth aspect of the present invention, since the exhaust gas can be circulated, if the high-temperature granular material to be cooled is a granular material that cannot be processed in the air due to oxidation or deterioration, nitrogen is used. Cooling can be performed by circulating and using an inert gas such as a gas.

[Brief description of drawings]

FIG. 1 is an overall schematic configuration diagram of a first example of an embodiment of the present invention.

2 is a partial vertical cross-sectional view of the flow tank in FIG.

3 is a cross-sectional view taken along the line AA of FIG.

FIG. 4 is a bottom view.

FIG. 5 is an overall schematic configuration diagram of a second example of an embodiment of the present invention.

FIG. 6 is an enlarged view of a control circuit of the air volume adjusting means.

FIG. 7 is an overall schematic configuration diagram of a third example of an embodiment of the present invention.

FIG. 8 is a partial vertical cross-sectional view of the flow tank in FIG.

9 is a sectional view taken along line BB of FIG.

FIG. 10 is a bottom view.

FIG. 11 is an overall schematic configuration diagram of a fourth example of an embodiment of the present invention.

FIG. 12 is a front view of a conventional example.

13 is an end view taken along line XX of FIG.

FIG. 14 is a right side view of a conventional example.

FIG. 15 is a plan view of a conventional example.

[Explanation of symbols] 2 Air transport pipe 2a Rising part 2A upstream air transport pipe 2B Downstream air transport pipe 3 Air source 4 Air volume control means 5 High temperature powder supply pipe 7 Peretizer 10 fluid tank 10a Inlet of fluidized tank 10b Fluid tank outlet 11 torso 12 Nearly inverted cone 13 Conical part 14 fins 14b outer peripheral edge 25 Inner tube 26 Central tube 41 Rectifier tube 42 Total pressure Pitot tube 43 Static pressure Pitot tube 44 Differential pressure transmitter 45 Pressure indicating controller 46 inverter 47 motor 50 Dust collector 51 Exhaust port 60 hopper 62 Air source for secondary cooling 80 Cooling means 81 outer jacket 82 Inner wall of outer jacket 83 First cooling water passage 90 Central tube 90a Inner wall of central tube 95 Water injection tube 95a outer wall 99 Second cooling water passage 110 circulation pipe 111 Tip of circulation pipe 112 Proximal end of circulation pipe

─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Osamu Matsui 6-526 Tanimachi, Chuo-ku, Osaka City, Osaka Prefecture Matsui Manufacturing Co., Ltd. (56) Reference JP-A-7-214548 (JP, A) Sho 60-96012 (JP, U) Japanese Patent Publication Sho 43-25553 (JP, B1) (58) Fields investigated (Int.Cl. ⁷ , DB name) B29B 9/00-13/10

Claims (5)

(57) [Claims] 1. An air transport pipe having a rising portion in the middle, an air source connected to the base end side of the air transport pipe for pneumatically transporting the hot powder or granular material in the air transport pipe, and a rising portion of the air transport pipe. A high temperature powder supply pipe connected to a more upstream position,
In the cooling device of Do that high Yutakako granules from the fluidized bed formed by enlarging the pipe diameter for cooling staying while flowing provided and the hot granular body to the rising portion, the flow Doso is A tubular body portion having a maximum pipe inner diameter, and a substantially inverted conical portion which is connected between a lower end portion of the body portion and an upper end portion of an upstream air transport pipe and which has a gradually increasing pipe inner diameter from a lower portion to an upper portion. , A substantially conical portion that is connected between the upper end of the body portion and the lower end of the downstream side air transport pipe, and has a substantially conical portion in which the pipe inner diameter is gradually reduced from the lower portion to the upper portion, and the body portion is provided with a plurality of fins. A cooling device for high-temperature powder particles characterized by being provided . 2. If multiple fins are provided on the body,
Both have cooling means for passing cooling water.
Characterized byAccording to claim 1.Cooling device for high temperature powder. 3. The body part of the fluidized tank is formed by an outer jacket having a tubular shape and an inner cylinder forming a first cooling water passage with an inner peripheral wall of the outer jacket, and a vertical direction to the inner cylinder. While providing a plurality of fins at intervals, a central tube is extended from the central bottom of the body to the outside of the side wall of the substantially conical portion, and the central tube has a small outer diameter. A water injection tube is inserted, a second cooling water passage is formed between the inner wall of the central tube and the outer wall of the water injection tube, and the cooling water injected from the water injection tube passes through the second cooling water passage to move to the central tube. Drain from the cooling water outlet,
The cooling device for a high-temperature powder or granular material according to claim 2, wherein a plurality of fins are provided on the outside of the central tube at intervals in the vertical direction. 4.   Formed in a fluid tankWas doneDownstream air at the outlet
Connect the transportation pipe and connect the tip of this downstream air transportation pipe.
A dust collector having an exhaust port is connected to the end of the dust collector.
Air from the secondary cooling air source is supplied to the lower part through the blower pipe.
Connected to a hopper that is designed to be introduced indoors.
The cooled material sent into the chamber of the upper
Further cooling by blowing air from the secondary cooling air source
ContractRequirement 1-3Of high-temperature powder or granular material according to any one of
Cooling system. 5. The cooling device for high-temperature powder and granules according to claim 4 , wherein the exhaust port of the dust collector is connected to the base end of a circulation pipe whose front end is connected to the suction side of the air source.