JP3147560U - Electric heating type high-speed dryer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electric heating type high-speed dryer capable of keeping the inside of a drying path at a high temperature over the entire length, improving the drying processing capacity and reducing the operation cost.
A dryer 1 carries an object M taken in a supply pipe 13 on hot air generated by a dryer 6 and feeds it into an introduction cylinder 14 where a spiral high-speed air flow from a main blower is provided. And is introduced into a tubular drying path 5 in which a plurality of bent portions are formed on the way. The conveyed product is agitated and pulverized into fine particles in the process of being continuously carried to the end of the drying path on the air flow, and moisture is absorbed in the surrounding air flow to be dried. The moisture is separated and removed by the cyclones 8, 9, and 10 incorporated in the middle of the drying path 5 and at the end portion. An electrothermal belt heater is attached to the drying path 5 and the cyclones 8 and 9 on the way, and heats the object to be processed and the air flow passing through these.
[Selection] Figure 1

Description

  The present invention relates to an electric heating type high-speed dryer for removing moisture contained in organic food residues, livestock dung, and the like in a short time.

Dry processing of coffee waste squeezed in the food manufacturing process, organic food residues such as okara and shochu, and sludge waste that contains a large amount of water such as livestock dung In order to achieve this, conventionally, for example, as described in Patent Document 1, an object to be processed is put into a long cylindrical container body, and the object is rotated by 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 provided at the center of the spiral blade and an outer heating means for heating the container body from the outside while being moved by the spiral blade.
JP 2003-145088 A

In the conventional drying apparatus as described in the above-mentioned Patent Document 1, the object to be processed put into the container main body is gradually dried while being gradually moved to the outlet side of the container main body by the 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.
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.

On the other hand, in order to solve the above-described problems, as described in Patent Document 2, a workpiece heated to a high temperature is introduced into the drying path from the start end of the tubular drying path, and this is performed at a high speed. There has been proposed a high-speed dryer that is transported to the end of the drying path by an air flow and can continuously and efficiently perform a drying process while stirring and pulverizing an object to be processed in the process.
Registration Utility No. 3138388

  In the high-speed dryer described in Patent Document 2 described above, since the object to be processed supplied to the dryer is heated by the burner immediately before being introduced into the drying path, the object to be processed has a large amount of moisture. If the object to be processed is cold in winter, etc., the heat generated by the burner may be insufficient and the drying process may be insufficient. It was necessary to use one with a high calorific value or lengthen the entire length of the drying path.

  On the other hand, if the length of the drying path is lengthened, there is a problem that the space required for installing the dryer increases, and the temperature in the drying path decreases at a position away from the burner due to heat radiation from the outer peripheral surface of the drying path. Since the drying efficiency is lowered, it is necessary to add piping for supplying hot air from the outside in the middle of the drying path.

  Therefore, the present invention eliminates the problems in the prior art described above, can keep the inside of the drying path at a high temperature over the entire length, can improve the drying processing capacity, and can reduce the operating cost. The purpose is to provide.

  In order to achieve the above object, an electric heating type high-speed dryer according to the present invention includes a cylindrical introduction tube having a circular cross section arranged in a substantially horizontal direction and a start end side end wall of the introduction tube coaxially. And a supply pipe in which an intake port for taking in a workpiece is formed in the peripheral wall of a portion protruding from the outer surface of the start end side end wall, and the end side is inserted to a midway position in the introduction cylinder A blower fan, an electric heater that heats the air that has passed through the blower fan to generate hot air, a dryer that blows hot air into the supply pipe from its start end, and a position closer to the start end of the introduction tube A main blower that blows air through a blower duct from a tangential direction into an annular space defined between an inner peripheral surface and an outer peripheral surface of the supply pipe, and a start end at a terminal portion of the introduction tube The parts are connected and on the way A tubular drying path in which a plurality of bent portions are formed; a cyclone that is incorporated in at least one place and a terminal portion in the middle of the drying path to separate and remove moisture from the drying path; and in the middle of the drying path An auxiliary blower provided near the outlet of the cyclone incorporated in the outlet, the suction side being connected to the outlet, and the discharge side being connected to the downstream side of the drying path, and the outer periphery of the cyclone incorporated in the middle of the drying path An electrothermal belt heater mounted on each of the surface and at least a part of the outer peripheral surface of the drying path, and a heat insulating material mounted on each of the drying path and the cyclone so as to cover at least the outside of the belt heater. An annular gap formed between the inner peripheral surface of the introduction cylinder and the outer peripheral surface of the supply pipe is continuously reduced toward the end of the supply pipe, and reaches the end near the end of the supply pipe. It is formed to be in.

  In the electrothermal heating type high speed dryer of the present invention, it is desirable that an electrothermal belt heater is mounted on the outer peripheral surface of the introduction cylinder. In addition, at least a part of the cyclones incorporated in the middle of the drying path and in the vicinity of the terminal end, the outlet of the previous cyclone is directly connected to the suction side of the auxiliary blower, and the discharge side of the auxiliary blower is It is also desirable to be directly connected to the entrance of the subsequent cyclone.

  According to the invention described in claim 1, the air flowing in the drying path and the cyclone and the workpiece to be moved on the flow of the air are mounted on the outer circumferential surface of the drying path and the cyclone. Because it is heated by an electrically heated belt heater, hot air generated by burning kerosene or the like with a burner is introduced from the beginning of the drying path at a position away from the beginning of the drying path. Thus, there is no such a case that the drying processing capacity of the object to be processed is reduced.

  In addition, the belt heater can always keep the object to be processed passing through the drying path and the cyclone incorporated in the middle of the drying path and the air flow carrying the object at a high temperature. The time required for processing can be shortened.

  In addition, since it takes less time to stay in the drying path until the drying process of the workpiece is completed, the drying path can be shortened by reducing the overall length of the drying path, and the drying process can be efficiently performed in a narrow place. It becomes possible.

  In addition, a combustion device such as a kerosene burner and piping for introducing hot air for reheating from the middle of the drying path are not required, and the drying path or cyclone through which the workpiece passes is directly heated by a belt heater. It has high thermal efficiency and can contribute to the reduction of greenhouse gas emissions such as CO2.

  Furthermore, by using an electrothermal belt heater, the temperature inside the cyclone built in the drying path and in the middle is controlled by controlling the energized state of the belt heater in each part, so that the type and characteristics of the object to be processed Accordingly, it is possible to easily set the optimum drying processing temperature.

  In addition, the air flow of the main blower blown from the tangential direction into the annular space defined by the inner peripheral surface of the introduction tube near the start end portion and the outer peripheral surface of the supply pipe. A spiral air flow is generated, and an annular gap formed between the inner peripheral surface of the introduction cylinder and the outer peripheral surface of the supply pipe is continuously reduced toward the end of the supply pipe and is minimized near the end of the supply pipe. Therefore, the spiral air flow reaches the maximum speed near the end of the supply pipe, and the tornado-like shape is formed by accelerating and accelerating the flow of hot air entering the introduction cylinder from the end of the supply pipe. The object to be processed can be smoothly flowed into the drying path without stagnation while turning.

  Further, according to the invention described in claim 2, the air blown from the main blower into the introduction cylinder is further heated by mounting an electrothermal belt heater on the outer peripheral surface of the introduction cylinder. The object to be processed which is heated by the hot air of the dryer and fed into the introduction cylinder from the supply pipe is not cooled again by the air supplied from the main blower, and the drying processing efficiency of the dryer can be increased.

  Further, according to the invention described in claim 3, since the preceding cyclone and the succeeding cyclone are connected in series via the auxiliary blower, the water to be processed is removed from the object to be processed. The absorbed ambient moist air passes through these cyclones continuously, so that the moisture contained in the air flow carrying the workpiece can be separated and removed efficiently.

  At this time, when the object to be processed and air pass through the preceding cyclone, the kinetic energy is partially lost and moisture is separated and removed at the outlet of the preceding cyclone. However, before entering the latter cyclone, the auxiliary blower incorporated between them again increases the speed of the workpiece and the air flow that carries it, so that the latter cyclone can also efficiently remove moisture. It can be separated and removed.

  Hereinafter, an embodiment of an electrothermal heating type high-speed dryer (hereinafter simply referred to as a dryer) of the present invention will be described. FIG. 1 is a side view showing a schematic structure of a dryer according to the present invention, and FIG. 2 is a schematic plan view of the dryer. The dryer 1 shown in these drawings includes okara, coffee squeezed rice cake, shochu, livestock Is disposed adjacent to a storage hopper 2 in which a processing object containing a large amount of water such as feces is stored, and the processing object M in the storage hopper 2 is connected by a screw conveyor 3 connected thereto. It is conveyed to the supply hopper 4 of the dryer 1.

  The dryer 1 includes a tubular drying path 5 in which a plurality of bent portions are formed in the middle as a main component, and an object M to be processed that is fed from the screw conveyor 3 to the supply hopper 4 is an electrothermal type. The hot air generated by the dryer 6 and the air blown from the outside by the main blower 7 (see FIG. 2) are fed into the drying path 5 by the mixed air flow and merged with the hot air. In the process of being transported toward the terminal end, the object to be processed M repeatedly collides with the tube wall of the drying path 5 and is stirred and pulverized, while moisture is evaporated and absorbed in the air flow to be dried.

  Moisture absorbed from the workpiece M into the hot air is separated and removed from the dryer 1 by the cyclones 8, 9, and 10 incorporated in the middle of the drying path 5 and at the end portions, respectively, and the drying processing is completed. The object M is recovered into the recovery container V from the discharge cylinder 10A of the cyclone 10 provided at the end of the drying path 5.

  Note that the dryer 1 itself and the components of the devices such as the storage hopper 2 and the screw conveyor 3 that are attached to the dryer 1 are exposed to moisture-treated objects and high-temperature air. It is made using a lot of stainless steel with excellent heat resistance.

  Although not shown in detail, the storage hopper 2 includes a coil spring-like stirring member 12 that is rotated around a horizontal axis by a gear motor 11. The stirring member 12 has a diameter that rotates in the vicinity of the bottom 2A formed in a semicircular cross section, and has a spiral shape with opposite pitches symmetrically with respect to the axial center position. When formed and rotated by the gear motor 11, the workpiece M stored in the storage hopper 2 is raked from the left and right sides to the center of the bottom 2 </ b> A of the storage hopper 2 while stirring.

  Although not illustrated, in the present embodiment, the storage hopper 2 includes a pipe line for introducing hot air dried from the outside, and when the workpiece M is stirred by the rotation of the stirring member 12, The hot air is used to partially evaporate the water contained in the workpiece M to reduce its water content.

  Further, a connecting portion 2B communicating with the screw conveyor 3 is provided at a position slightly offset in the rotational direction of the stirring member 12 from the center of the bottom portion 2A of the storage hopper 2, and the inside of the storage hopper 2 is connected through the connecting portion 2B. The workpiece M is taken into the screw conveyor 3.

  The screw conveyor 3 incorporates a screw 3B that is rotationally driven by a gear motor 3A provided at the upper end, and the workpiece M that has fallen into the screw conveyor 3 from the storage hopper 2 by the rotation of the screw 3B is transmitted to the gear motor. It is sent out to a discharge port 3C provided in the vicinity of 3A.

FIG. 3 is a partial longitudinal sectional view showing a schematic structure around the workpiece introduction part communicating between the supply hopper 4 and the starting end of the drying path 5, and as shown in FIG. 4 is connected to an intake port 13A formed in the upper side wall of the supply pipe 13 provided horizontally, and the workpiece M introduced into the supply hopper 4 from the discharge port 3C of the screw conveyor 3 is Then, after temporarily staying in the supply hopper 4 functioning as a buffer for the workpiece M, it is taken into the supply pipe 13 from the intake port 13A.
Although not shown in the drawing, an electrothermal belt heater is attached to the entire peripheral wall of the supply hopper 4, and the outer side thereof is covered with a heat insulating material made of glass fiber.

  The supply pipe 13 is formed in a circular cross section, the dryer 6 is connected to the start end side thereof, and the end side is coaxial with the end wall 14A on the start end side of the introduction cylinder 14 also formed in a circular cross section. And is fixed at a position inserted into the introduction cylinder 14 by a predetermined length.

  The dryer 6 includes an electric heater 6A and a blower fan 6C that is rotated by a fan motor 6B. The air taken in from the outside by the rotation of the blower fan 6C is passed through the electric heater 6A to be hot hot air. The workpiece M blown into the supply pipe 13 and taken into the supply pipe 13 through the intake port 13A has a role of feeding it into the introduction tube 14 while being heated with this hot air.

  In the present embodiment, a rectifying portion 13B composed of comb-like irregularities is formed on the end edge of the supply pipe 13 over the entire circumference. The rectifying unit 13B prevents the flow of hot air, which is jetted into the introduction cylinder 14 from the end of the supply pipe 13 together with the workpiece M, from spreading outward, and rectifies so as to be jetted into the introduction cylinder 14 as a parallel flow. Have a role.

  Further, the introduction cylinder 14 surrounding the outside of the supply pipe 13 has a section a having a predetermined length on the start end side formed in a cylindrical shape having a large diameter, and a peripheral wall in the section a as shown in FIG. One end of the air duct 15 is connected to the air duct 15.

  The other end of the air duct 15 is connected to a discharge port of the main blower 7 that generates a large air flow, and is defined between the inner peripheral surface of the introduction cylinder 14 and the outer peripheral surface of the supply pipe 13. The air blown from the main blower 7 is blown into the formed space having an annular cross section from the tangential direction.

  On the other hand, as shown in FIG. 3, the inner diameter of the introduction tube 14 decreases in a tapered manner toward the end side of the supply pipe 13 in a section b from the midway position to a position near the end of the supply pipe 13. An annular gap formed between the inner peripheral surface and the outer peripheral surface of the supply pipe 13 is set to be minimum near the end of the supply pipe 13.

  In addition, the introduction cylinder 14 has a section c that increases in a taper shape from the position where the gap becomes the minimum toward the end side, and in the subsequent section d, the introduction cylinder 14 is reduced again to a taper shape, and the end portion is dried. The start end of the path 5 is connected to the inner diameter of each other.

  As shown in FIGS. 1 and 2, the drying path 5 is mainly composed of a large number of vertical pipe lines 5A and upper and lower connection pipe lines 5B and lower connection pipe lines that connect the upper and lower ends thereof. It is composed of a portion 5C, and repeatedly meanders in the vertical plane.

  In the present embodiment, in order to suppress heat loss due to heat radiation from the drying path 5 to the outside, substantially the entire portion of the drying path 5 is placed in a box-shaped heat insulation chamber 16 that is internally lined with a heat insulating material. Is housed.

  Moreover, as already stated, cyclones 8, 9, and 10 for separating and removing water vapor from the inside of the drying path 5 are incorporated in two places in the middle of the drying path 5 and in the vicinity of the terminal portion, respectively, Auxiliary blowers 17 and 18 are incorporated in the vicinity of the downstream side of the cyclone 8 and the cyclone 9 in the drying path 5.

  As shown in FIG. 5, the vertical pipe line 5 </ b> A of the drying path 5 has an electrothermal belt heater 19 installed in a spiral shape as shown in FIG. 5, and the outside is covered with a heat insulating material 20 made of glass fiber. The outside of the belt heater 19 and the heat insulating material 20 are protected by surrounding them with a protective wire mesh 21.

  By energizing the belt heater 19, when the vertical pipe 5A to which the belt heater 19 is attached is heated from the outside, the heat is transferred by heat conduction from the vertical pipe 5A to the upper connecting pipe 5B and the lower connecting pipe 5B. The entire drying path 5 is heated through the side connection pipe line 5C.

  The cyclone 8 and the cyclone 9 incorporated in the middle of the drying path 5 are also heated from the outside by the same structure as the vertical pipe line 5A. FIG. 6 is a view showing a state in which the belt heater and the heat insulating material are attached to these cyclones. FIG. 6A shows a state in which the belt heater 22 is attached to the outer periphery of the cyclone 8 (9), and FIG. A state in which the outside is covered with a heat insulating material 23 made of glass fiber, (c) further shows a state in which the outside is covered with a protective wire mesh 24, and these cyclones 8, 9 are in the state shown in FIG. Used by assembling.

  In addition, since only the cyclone 10 incorporated in the terminal part of the drying path 5 needs to lower the temperature of the object to be processed by radiating heat at the final stage of the drying process, no belt heater or heat insulating material is mounted. . Further, the cyclone 10 may be actively cooled by installing a cooling pipe through which a cooling medium such as cooling water passes instead of installing a belt heater.

Next, a process of drying the object to be processed by the dryer according to the present invention configured as described above will be described.
1 and 2, the workpiece M stored in the storage hopper 2 starts stirring by rotating the stirring member 12 before being taken into the dryer 1, and a hot air source such as a dryer (not shown). The heated hot air is fed into the storage hopper 2 to heat the workpiece M.

  In addition, the belt heaters 19 and 22 described above are energized in advance to heat the drying path 5 and the cyclones 7 and 8 incorporated in the middle thereof, and the dryer 6, the main blower 15, and the auxiliary blowers 17 and 18. To work.

  Thus, when the inside of the drying path 5 becomes sufficiently high, the screw conveyor 3 is started. In this way, the workpiece M stored in the storage hopper 2 is supplied to the supply hopper 4 by the screw conveyor 3, and further from here, as shown in FIG. It passes through and falls into the supply pipe 13.

  The workpiece M taken into the supply pipe 13 is rapidly heated by receiving high-temperature hot air blown from the already operating dryer 6, and the hot air blows into the introduction cylinder 14 from the end of the supply pipe 13. It is blown into.

  On the other hand, as shown in FIG. 4, the main blower 7 passes through the air duct 15 and enters an annular space defined between the inner peripheral surface of the introduction tube 14 and the outer peripheral surface of the supply pipe 13. The air blown from the tangential direction flows spirally and flows to the end side of the introduction cylinder 14, and increases the flow velocity while passing through the section b in FIG. When passing through the vicinity of the end of the supply pipe 13 where the annular gap between the peripheral surface and the outer peripheral face of the supply pipe 13 is minimized, the flow velocity reaches the maximum speed.

  The spiral air flow surrounds the periphery of the flow of hot air including the workpiece M that has entered the introduction cylinder 14 from the end of the supply pipe 13, imparts kinetic energy thereto, accelerates it, and merges it. It flows into the drying path 5 while turning in a shape.

  In this embodiment, the inner peripheral surface of the introduction cylinder 14 is provided in the introduction cylinder 14 by providing a section c in which the inner diameter increases in a tapered shape from the vicinity of the end of the supply pipe 13 toward the start end of the drying path 5. The flow of air in the vicinity is stabilized and energy loss due to the generation of vortices is prevented.

  In addition, air vortices are generated from the end of the supply pipe 13 by the rectifying unit 13B formed of comb-like irregularities provided at the end of the supply pipe 13, and the flow of hot air and the object M to be processed conveyed to the air vortex is generated. It is prevented from distorting and spreading outward to cause energy loss.

  In the introduction cylinder 14, since the air sent from the main blower 15 merges with the hot air carrying the workpiece M, the temperature around the workpiece M is temporarily lowered. As described above, the drying path 5 The belt heater 19 is energized in advance to heat the vertical pipe 5A, and since the entire drying path 5 is already at a high temperature due to heat conduction from the vertical pipe 5A to the entire drying path 5, the inside of the drying path 5 The air flow that has entered the flow path and the object M to be processed are heated again to a high temperature by heat transfer from the inner wall surface of the drying path 5.

  And the to-be-processed object M which entered in the drying path 5 rides on the air stream which flows at high speed, and is conveyed downstream, but since the drying path 5 repeats meandering in the vertical plane, The material M is agitated vigorously when it rises or descends the vertical pipe 5A, or passes through the upper and lower connecting pipes 5B and 5C, or is crushed to collide with the pipe wall and gradually becomes granular. The diameter becomes fine.

  And since the surface area of the workpiece M passing through the drying path 5 increases every time it is pulverized, evaporation of moisture contained therein is promoted, and the high temperature surrounding the workpiece M is high. Moisture is absorbed into the air stream.

  Thus, the workpiece M that has been transported partway through the drying path 5 enters the first cyclone 8 where the moisture in the high-temperature air stream that has carried the workpiece M is separated and removed. . At this time, as described above, since the cyclone 8 is heated to a high temperature by the belt heater 22 (see FIG. 6A), the workpiece is not cooled when passing through the cyclone 8.

  The workpiece M exiting the cyclone 8 and the hot air stream carrying it are then sucked into the auxiliary blower 17 where it is given kinetic energy and again passes through the drying path 5 meandering up and down, The particle size of the workpiece M is further reduced, and is further heated by heat transfer from the inner wall of the drying path 5 to further dry.

  Thereafter, the object to be processed M and the high-temperature air stream carrying the object enter the next cyclone 9 heated to a high temperature by the belt heater 22 as in the above-described cyclone 8, and carry the object to be processed M again here. Moisture in the generated air is separated and removed.

  Thereafter, the workpiece M exiting the cyclone 8 and the air flow carrying the workpiece M are further sucked into the auxiliary blower 18 and given kinetic energy again, and then pass through the drying path 5 meandering up and down again to be treated. The material M is further finely divided and dried, and finally enters the cyclone 10 outside the heat insulating chamber 16 incorporated in the end of the drying path 5, where the remaining water is finally separated and removed. Then, it is recovered into the recovery container V from the discharge cylinder 10 </ b> A of the cyclone 10 serving as the end of the drying path 5. In addition, the cyclone and auxiliary blower to be incorporated in the middle of the drying path 5 may be provided in one place or three or more places in the middle according to the length of the drying path 5.

  Next, FIG. 7 is a view showing a connecting structure of a double cyclone used in another embodiment of the present invention, and the double cyclone shown in the figure is a cyclone used in the dryer 1 described above. 8, 9, or 10, and the outlet of the cyclone 25 in the preceding stage is directly connected to the suction side of the auxiliary blower 26, and the discharge side of the auxiliary blower 26 is connected to the subsequent side. It is directly connected to the entrance of the cyclone 27.

  The double cyclone shown in the figure can enhance the ability to separate and remove moisture even when each cyclone is small and has a small processing capacity. In this embodiment, two cyclones are connected in series. However, if necessary, three or more cyclones may be used by incorporating auxiliary blowers between them and knitting in series. .

  Further, in the dryer 1 described above, the belt heater 19 is attached and heated only in the vertical pipe 5A portion of the drying path 5, but the vertical pipe 5C and the lower connection pipe 5C are also used for the vertical pipe. A belt heater or a heat insulating material may be attached in the same manner as the path 5A. Further, a belt heater or a heat insulating material may be mounted around the inside of the introduction cylinder 14 to heat the air taken in from the main blower 7.

  Further, in order to further improve the drying processing capacity, a belt heater or a heat insulating material is attached to the outside of the portion through which the workpiece M passes, such as the screw conveyor 3, the supply pipe 13, and the introduction cylinder 14, as necessary. Heating and heat insulation may be performed.

  In the embodiment described above, most of the drying path 5 is housed in the heat insulation chamber 16 and insulated from the outside. However, by applying a heat insulating material to the drying path 5 itself, release to the outside is possible. When the amount of heat can be reduced, the drying path 5 does not necessarily have to be covered with the heat insulating chamber 16.

  Further, in the above-described embodiment, the drying path 5 is meandered and bent only in the vertical plane. However, the present invention is not limited to this, and the drying path 5 is meandered and bent in a horizontal plane. You may make it bend in a direction.

  Further, in the above-described embodiment, as shown in FIG. 3, the lower end outlet of the supply hopper 4 is connected to the intake 13 </ b> A of the supply pipe 13, and the workpiece M is taken into the supply pipe 13. However, the present invention is not limited to this, and the workpiece M may be sent to the intake port 13A of the supply pipe 13 by another method, for example, by directly connecting the discharge port 3C of the screw conveyor 3 to the intake port 13A. Good.

  The high-speed drying system of the present invention can be widely used for drying processing of wastes containing a large amount of water such as okara, coffee squeezed rice cake, shochu, and livestock dung. It can also be used in a drying treatment step as a pretreatment step when carbonizing a product.

1 is a side view showing a schematic structure of an embodiment of an electric heating high-speed dryer according to the present invention. 1 is a plan view showing a schematic structure of an embodiment of an electric heating high-speed dryer according to the present invention. It is a fragmentary longitudinal cross-section which shows schematic structure of the to-be-processed object introduction part periphery in one Embodiment of the electrothermal heating type high-speed dryer of this invention. It is AA sectional drawing of FIG. It is a figure which shows the mounting structure of the belt heater and the heat insulating material to the drying path in one Embodiment of the electrothermal heating type high-speed dryer of this invention. It is a figure which shows the mounting structure of the belt heater and heat insulating material to the cyclone in one Embodiment of the electrothermal heating type high-speed dryer of this invention. It is a figure which shows the connection state of the double cyclone used in another embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Dryer 2 Storage hopper 2A Bottom part 2B Connection part 3 Screw conveyor 3A Gear motor 3B Screw 3C Discharge port 4 Supply hopper 5 Drying path 5A Vertical pipe line 5B Upper connection pipe line 5C Lower connection pipe line 6 Dryer 6A Electric heater 6B Fan motor 6C Blower fan 7 Main blowers 8, 9, 10, 25, 27 Cyclone 10A Discharge cylinder 11 Gear motor 12 Stirring member 13 Supply pipe 13A Inlet 13B Rectifier 14 Inlet cylinder 14A End wall 15 Air duct 16 Thermal insulation chambers 17, 18, 26 Auxiliary blowers 19 and 22 Belt heaters 20 and 23 Heat insulation materials 21 and 24 Protective wire mesh

Claims (3)

An introduction tube having a circular cross section arranged with the longitudinal direction being substantially horizontal;
A workpiece is passed through the peripheral wall of the portion protruding from the outer surface of the start end side end wall while the end side is inserted through the start end side end wall of the introduction tube coaxially and inserted into the introduction tube by a predetermined length. A supply pipe formed with an intake for taking in;
A blower fan, and an electric heater that heats the air that has passed through the blower fan to generate hot air, and a dryer that blows hot air into the supply pipe from its starting end; and
A main blower that blows air from the tangential direction through an air duct into an annular space defined between the inner peripheral surface near the start end of the introduction tube and the outer peripheral surface of the supply pipe; ,
A tubular drying path in which a start end is connected to a terminal end of the introduction tube and a plurality of bent portions are formed in the middle,
A cyclone that is incorporated into at least one location and the end of the drying path, and separates and removes moisture from the drying path;
An auxiliary blower provided near the outlet of a cyclone incorporated in the middle of the drying path, the suction side being connected to the outlet, and the discharge side being connected to the downstream side of the drying path;
An electrothermal belt heater attached to each of the outer circumferential surface of the cyclone incorporated in the middle of the drying path and the outer circumferential surface of at least a part of the drying path;
A heat insulating material attached to each of the drying path and the cyclone so as to cover at least the outside of these belt heaters;
An annular gap formed between the inner peripheral surface of the introduction cylinder and the outer peripheral surface of the supply pipe is formed so as to continuously decrease toward the end of the supply pipe and to be minimized near the end of the supply pipe. Electric heating type high-speed dryer.   The electrothermal heating type high-speed dryer according to claim 1, wherein an electrothermal belt heater is mounted on the outer peripheral surface of the introduction cylinder.   At least some of the cyclones installed in the middle of the drying path and in the vicinity of the terminal end have the outlet of the preceding cyclone directly connected to the suction side of the auxiliary blower, and the discharge side of the auxiliary blower is connected to the succeeding cyclone. 3. The electric heating type high-speed dryer according to claim 1, wherein the electric heating type high-speed dryer is directly connected to an inlet of the cyclone.

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