JP3138388U - High speed dryer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a high-speed dryer having a simple structure, low manufacturing cost, and easy maintenance, which requires less space for installation and can dry an object to be processed at high speed.
An object to be treated supplied from a raw material hopper 2 to a screw feeder 5 is fed into a drying path 7 while being heated by a burner 6, and is conveyed through the drying path 7 by air introduced from the outside by a blower 8. . The moisture of the workpiece heated by the burner 6 is removed by the air passing through the drying path 7 together with the workpiece, and the air that has absorbed moisture from the workpiece near the end of the drying path 7 is separated and removed by the cyclone 9. Then, the object to be processed is taken out from the end of the drying path 7.
[Selection] Figure 1

Description

  The present invention relates to a dryer for removing moisture contained in organic food residues such as okara and coffee squeezed rice cake and livestock feces in a short time.

Conventionally, for example, Patent Document 1 describes a method for drying waste that is sludge-containing and contains a large amount of water such as organic food residues generated in food production processes and livestock dung. As shown, the object to be processed was placed in a long cylindrical container body, and the object to be processed was moved at the center of the spiral blade while being moved by a shaftless spiral blade rotating with a motor in the container body. There has been proposed a drying apparatus for heating and drying an object to be processed by an inner heating means and an outer heating means for heating the container body from the outside.
JP2003-145088

In the conventional drying apparatus as described in Patent Document 1 described above, a structure in which an object to be processed put into the container body is gradually dried while being gradually moved to the discharge port side of the container body by a spiral blade. Therefore, it is necessary to increase the overall length of the container body in order to increase the ability to continuously process the object to be processed. There was a problem that required installation space.
Moreover, due to the complicated structure in which the heating means and the spiral blades are arranged inside the container body, the manufacturing cost is increased and maintenance such as cleaning and inspection is difficult.

  Therefore, the present invention solves the above-mentioned problems, requires less space for installation, and can dry the workpiece at high speed, has a simple structure, low manufacturing cost, and easy maintenance. It aims at providing a simple high-speed dryer.

  In order to achieve the above object, a high-speed dryer according to the present invention includes a screw feeder in which a conveying screw is built in a cylindrical casing connected to a raw material hopper, and a workpiece is supplied from the raw material hopper, and the screw. A burner which is provided in the feeder and which heats the object to be processed and which is conveyed in the casing; a tubular drying path whose start end is connected to a conveying direction end of the casing of the screw feeder; and a start end of the drying path A blower that is provided in the vicinity and conveys the object to be processed fed into the drying path from the screw feeder to the drying path end side by the flow of air taken from the outside of the drying path, and provided near the end of the drying path. And a cyclone that separates and removes air that has absorbed moisture from the workpiece.

  The high-speed dryer according to the present invention further includes at least one burner for reheating the workpiece to be passed in the middle of the drying path, and at least one blower for taking air from the outside into the drying path. It is desirable.

  It is also desirable to further include at least one cyclone that separates and removes air that has absorbed moisture from the object to be processed in the middle of the drying path, and that the main part of the drying path meanders up and down in a vertical plane. As shown in the figure, it is composed of a plurality of vertically arranged long drying cylinders and short drying cylinders that connect the upper and lower ends of these drying cylinders adjacent to each other, and at least some of the short drying cylinders are removable. It is also desirable that

  According to the high-speed dryer according to the first aspect of the present invention, a large amount of material to be processed heated to a high temperature by a high-temperature flame of a burner inside the casing of the screw feeder is fed into the drying path and blown into the drying path by a blower. Since the object to be processed is caused to flow toward the end of the drying path by the air, the object to be processed is stirred and pulverized by a high-speed air flow while passing through the drying path to evaporate moisture. Therefore, the drying process can be performed at a high speed and continuously.

  Also, just before the workpiece reaches the end of the drying path, the cyclone separates and removes a large amount of air that has carried the workpiece, so that dust on the workpiece does not rise at the exit of the drying path. At the outlet of the drying path, the object to be treated is deprived of heat by the large amount of air that has been separated and removed, and the temperature is lowered, so that it can be recovered safely and easily.

  In addition, the drying path for drying the object to be processed does not require moving parts such as spiral blades for conveying the object to be processed as found in conventional dryers, so the structure is simple and the manufacturing cost can be reduced. Cleaning and inspection can be performed easily.

  Further, according to the high speed dryer according to the invention described in claim 2, in addition to the effect of the invention of claim 1, the workpiece whose temperature has decreased while passing through the long drying path is re-used with the burner. By heating and replenishing new air with a blower from the middle, the drying capacity of the object to be processed can be further increased.

  Moreover, according to the high speed dryer which concerns on the device described in Claim 3, in addition to the effect of the device of Claim 1 or 2, in addition to the effect of the device of Claim 1, the water vapor generated from the object to be processed passes through the drying path in the cyclone. The amount of water contained in the air in the drying path on the downstream side can be reduced and the drying treatment capacity can be further increased.

  Further, according to the high speed dryer according to the invention described in claim 4, in addition to the effect of the device according to any one of claims 1 to 3, the main part of the drying path of the high speed dryer is further vertically Since it is meandering up and down in the plane, the installation space can be reduced, and the direction of the air flow passing through the meandering portion of the drying path changes, so that the work to be stirred and pulverized can be performed. It is accelerated | stimulated and can dry a to-be-processed object more effectively.

  In addition, since at least a part of the short drying cylinder constituting the drying path is detachable, an effect of easily performing the cleaning of the drying path and the maintenance and inspection work can be obtained.

  FIG. 1 is a schematic structural view showing an embodiment of a high-speed dryer according to the present invention. As shown in the figure, the high-speed dryer 1 is provided inside a cylindrical casing 3 connected to a raw material hopper 2. A screw feeder 5 having a conveying screw 4 incorporated therein, a burner 6 provided in the screw feeder 5, a tubular drying path 7 having a starting end connected to a terminal portion of the casing 3 of the screw feeder 5 in the conveying direction, A blower 8 provided near the start end of the drying path 7 and a cyclone 9 provided near the end of the drying path 7 are provided.

  As shown in FIG. 2, the raw material hopper 2 has an opening at the upper end, and a workpiece to be dried such as okara is input from here. In the present embodiment, upper and lower two-stage stirring members 10 and 11 are provided in the raw material hopper 2 for stirring and unraveling the charged workpieces and preventing the occurrence of bridges. .

  These agitating members 10 and 11 are composed of a spiral or paddle-shaped rotating body, and are rotationally driven by a rotational drive source (not shown). In addition, you may use what can change the rotation speed according to the rotational speed of the conveying screw 4 of the screw feeder 5 as this rotational drive source.

  The lower end of the raw material hopper 2 communicates with the casing 3 of the screw feeder 5. The conveying screw 4 in the casing 3 is driven and connected to a drive source 12 having a variable rotational speed provided outside the casing 3 on the end side in the conveying direction. A thing is conveyed to the drying path 7 side by a fixed ratio.

  The burner 6 uses a kerosene burner, and heats the inside of the casing 3 to a high temperature by injecting a flame at 800 ° C. from the start end side to the end side in the conveying direction of the casing 3 of the screw feeder 5.

  As shown in FIG. 1, the main part of the drying path 7 includes five long drying cylinders 13 that are held vertically by a support frame (not shown), upper ends of these drying cylinders 13, and A short drying cylinder 14 that connects the lower ends to each other is formed so as to meander up and down in a vertical plane, and is stored in the drying chamber 15.

  The last part of these five drying cylinders 13 communicates with a drying cylinder 17 exposed to the outside of the drying chamber 15 via a short drying cylinder 16 and connected to the cyclone 9. The cyclone 9 has an exhaust pipe 18 that extends upward and a discharge cylinder 19 that opens downward.

  In this embodiment, the drying cylinders 13, 14, 16, and 17 are made of stainless steel pipes having a diameter of 200 mm. The long drying cylinder 13 has a length of 4 m, and the short drying cylinders 14 and 16 have the same length. Is 500 mm long.

Moreover, the short drying cylinder 14 can be attached or detached from between the adjacent long drying cylinders 13 so that cleaning and inspection in the drying path 7 can be easily performed.

  As shown in FIG. 2, the blower 8 is attached to the lower end of the drying cylinder 13 which is the starting end of the drying path 7 with the air discharge port facing upward. In this embodiment, the output is 2.2 kW / The thing of h is used.

Next, operation | movement of the high-speed dryer 1 mentioned above is demonstrated.
First, when the high-speed dryer 1 is started, the stirring members 10 and 11 in the raw material hopper 2 and the conveying screw 4 of the screw feeder 5 start to rotate, and the blower 8 and the cyclone 9 also start to operate.

  Next, the burner 6 is ignited, and the inside of the casing 3 of the screw feeder 5 is preheated by the flame to a high temperature. When the inside of the casing 3 reaches a sufficiently high temperature, the material to be processed for drying the raw material hopper 2 such as bean curd and livestock dung is introduced.

  The object to be processed put in the raw material hopper 2 is stirred by the stirring member 10 located in the upper stage to break up the lump, and the stirring of the stirring member 11 located in the lower stage causes the raw material hopper 2 to move at a constant speed. It moves to the lower part and falls into the casing 3 of the screw feeder 5.

  The object to be processed fed into the casing 3 is heated by a high-temperature flame generated by the burner 6 to remove moisture, and gradually moves toward the end of the casing 3 as the conveying screw 4 rotates. And it is sent to the lower end part of the perpendicular | vertical drying cylinder 13 which comprises the starting-end part of the drying path 7. FIG.

  The object to be processed fed into the lower end portion of the drying cylinder 13 is blown up by a high-speed air flow blown upward from the blower 8 and is conveyed toward the terminal side through the drying path 7 that meanders up and down in a vertical plane. .

  In this process, the water vapor generated from the workpiece heated by the burner 6 is absorbed into a large amount of air blown into the drying path 7 from the blower 8, thereby efficiently drying the workpiece. Done.

  In this way, the object to be processed that has alternately passed through the vertical drying cylinder 13 and the horizontal drying cylinder 14 passes through the short drying cylinder 16 and the oblique drying cylinder 17, and the cyclone provided at the end of the drying path 7. 9, where it is separated from a high-speed air stream containing a large amount of water vapor, and most of the air stream is discharged from the exhaust pipe 18 into the atmosphere, and the drying process is completed from the discharge cylinder 19 to form a granular material. The object to be processed is discharged.

  When the object to be processed is discharged from the discharge cylinder 19, most of the air flow is separated when passing through the cyclone 9, so that air blows out from the discharge cylinder 19 together with the object to be scattered. There is nothing wrong.

  In the present embodiment, collection of the processed object after the drying process is performed by using a storage bag made of 1 ton of cloth as the recovery container 20 and setting the entrance of the storage bag into the outlet of the discharge tube 19. ing. It should be noted that it is desirable to use a storage bag with excellent air permeability because some moisture remains on the surface of the object to be processed.

  Incidentally, the temperature of the drying path 7 is an average of 380 ° C. in the vertical drying cylinder 13 on the start end side, an average of 260 ° C. in the second vertical drying cylinder 13, and an average of 180 ° C. in the third vertical drying cylinder 13. The temperature gradually decreases to an average of 120 ° C. in the fourth vertical drying cylinder 13 and an average of 80 ° C. in the fifth vertical drying cylinder 13 and to an average of 50 ° C. in the discharge cylinder 19.

  In addition, in the present embodiment, each component of the screw feeder 5 is made of a stainless material particularly excellent in heat resistance so that it can withstand the high temperature of 800 ° C. of the combustion gas generated by the burner 6. Also, the components of the drying cylinders 13, 14, 16, 17, and the cyclone 9 constituting the blade portion of the blower 8 and the drying path 7 that become high temperature are heat resistant so that they can withstand long-term continuous use. Uses stainless steel with excellent wear resistance.

  Next, FIG. 3 is a schematic structural diagram of another embodiment of the high-speed dryer according to the present invention, and the high-speed dryer 1A shown in FIG. 3 is the same as the number used in FIG. About the part shown by, it has the same structure as the high-speed dryer 1 mentioned above.

  In the high-speed dryer 1A shown in FIG. 3, a cyclone 9A is added in the middle of the drying cylinder 13 constituting the downward conveying portion of the first half of the drying path 7A, and the high-temperature dryer 1A sent from the screw feeder 5 to the drying path 7A. Water vapor generated from the object to be processed is separated and removed by the cyclone 9A at an early stage of passing through the drying path 7A, and the amount of moisture contained in the air in the drying path 7A on the downstream side is reduced, thereby improving the drying processing capacity. We are trying to improve.

  Further, in this high-speed dryer 1A, a burner 6A similar to the burner 6 described above is added to the transport direction start end side of the drying cylinder 21 constituting the horizontal transport portion below the latter half of the drying path 7A. In addition, the object to be treated whose temperature has been reduced while passing through the drying path 7A is reheated by the burner 6A to promote evaporation of moisture contained therein.

Further, a blower 8A is added to a connecting portion between the terminal end of the drying cylinder 21 and the drying cylinder 13 that constitutes the upward conveying portion following the drying cylinder 21.
When the air sent from the blower 8 into the drying path 7A passes through the cyclone 9A together with the object to be processed, a part of the air is discharged to the outside together with the water vapor, and therefore flows in the drying path 7A on the downstream side. The air flow rate is reduced and the drying capacity is reduced.

  Therefore, in the present embodiment, the blower 8A from the middle of the drying path 7A blows new external air toward the conveying direction of the drying path 7A to increase the flow rate of the air, and the downstream portion of the drying path 7A. In this case, the drying capacity is not lowered.

In addition, this invention is not limited to the thing of each embodiment mentioned above, The number of cyclones, burners, and a blower provided in the middle of a drying path can be suitably selected as needed.
In these embodiments, the main portions of the drying paths 7 and 7A are arranged in the drying chamber 15 in order to increase the thermal efficiency, but they are exposed to the outside without providing the drying chamber 15. You may install in a state.

  The moisture content of the object to be treated could be reduced to 35% to 40% by drying the okara with a moisture content of 90% to 95% by the high speed dryer 1 having the configuration shown in FIG. When okara is used as livestock feed, the moisture content only needs to be reduced to 40%. Therefore, the dried okara can be used as livestock feed without problems.

  On the other hand, when the coffee grounds are dried to produce livestock feed, the moisture content of the raw material itself is about 80%, but since the amount of moisture adhering to the surface of the raw material is large, a dry path is constructed. When the drying tube is meandered up and down four times and the drying process is performed with a configuration in which a burner and a blower are added one by one as in the high-speed dryer 1A shown in FIG. 3, the moisture content after the drying process is 20% could be achieved.

  The high-speed dryer of the present invention can be widely used in the drying process of wastes containing a large amount of moisture such as okara, coffee squeezed rice cake, and livestock dung, etc. It can utilize also for the drying process process as a pre-processing process in the case of processing.

It is a schematic structure figure in one embodiment of a high-speed dryer of the present invention. It is the elements on larger scale in one Embodiment of the high-speed dryer of this invention. It is a schematic structure figure in another embodiment of a high-speed dryer of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1, 1A High-speed dryer 2 Raw material hopper 3 Casing 4 Conveying screw 5 Screw feeder 6 Burner 7, 7A Drying path 8, 8A Blower 9, 9A Cyclone 10, 11 Stirring member 12 Rotation drive sources 13, 14, 16, 17, 21 Drying cylinder 15 Drying chamber 18, 18A Exhaust pipe 19, 19A Discharge cylinder 20 Collection container

Claims (4)

A screw feeder in which a conveying screw is built in a cylindrical casing connected to the raw material hopper, and a workpiece is supplied from the raw material hopper;
A burner that is provided in the screw feeder and that heats the workpiece to be conveyed in the casing;
A tubular drying path having a start end connected to a terminal end in the conveying direction of the casing of the screw feeder;
A blower that is provided in the vicinity of the start end of the drying path, and that conveys the workpiece that has been fed into the drying path from the screw feeder to the drying path end side by the flow of air taken from the outside of the drying path,
A high-speed dryer provided with a cyclone that is provided near the end of the drying path and separates and removes air that has absorbed moisture from the object to be processed.   In the middle of the drying path, the apparatus further comprises at least one burner for reheating the workpiece to be passed and at least one blower for conveying the workpiece to the drying path end side by the flow of air taken from the outside of the drying path. The high-speed dryer according to claim 1.   The high-speed dryer according to claim 1 or 2, further comprising at least one cyclone for separating and removing air that has absorbed moisture from the object to be processed in the middle of the drying path.   Short drying that connects a plurality of vertically arranged long drying tubes and the upper ends and lower ends of these drying tubes adjacent to each other so that the main part of the drying path meanders up and down in a vertical plane. The high-speed dryer according to any one of claims 1 to 3, wherein the high-speed dryer comprises a cylinder, and at least a part of the short drying cylinder is detachable.

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