JP2015010809A - Drying device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a drying device that enables stable discharge and efficient drying of objects to be dried having small variation in moisture contents.SOLUTION: A drying device includes: detection means 15A-15C,16 for detecting moisture contents in objects to be dried within a cylindrical body; retention time adjustment means 5 for adjusting retention time of the objects to be dried; thermal energy amount adjustment means 6 for adjusting thermal energy amount of a heating medium; and a control section 46 for controlling the retention time adjustment means and the thermal energy amount adjustment means. In accordance with the moisture contents detected by the detection means, the retention time adjustment means and the thermal energy amount adjustment means are controlled by the control section.

Description

  The present invention dries industrial waste sludge, sludge, etc. discharged for general industrial products, fish meal and other feeds, fertilizer production, chemical resin production such as synthetic resin, or factory wastewater and sewage treatment. The present invention relates to a drying apparatus.

  Generally, sludge and sludge generated from food residues and water treatment devices are subjected to a weight reduction process that evaporates moisture contained therein. Here, in order to evaporate moisture etc., the contact member such as a container is heated by a direct drying method in which hot air is directly blown against the processed material, or a heating medium such as steam, and the heated contact member. There is an indirect drying method in which heat is indirectly transferred to a treated product by bringing the treated product into contact with the treated product.

As a drying apparatus employing the indirect drying method described above, a drying apparatus including a fixed body having a cylindrical body with side walls provided at both ends and a rotating shaft that is rotatably inserted into the fixed body is disclosed. (For example, refer to Patent Document 1). Here, a plurality of stirring blades are connected to the rotating shaft, and each stirring blade is heated by a heat medium that circulates inside. In addition, a jacket is provided on the outer peripheral portion of the cylindrical body, and a heat medium flows through the jacket.
And the to-be-dried material (processed material) supplied in the inside of a cylindrical body is conveyed, stirring and drying with a some stirring blade. At this time, by providing a plurality of stirring blades, the contact area with the object to be dried increases, and the object to be dried can be efficiently dried.

  By the way, in such a drying apparatus, it is desired that the moisture content in the material to be dried discharged from the cylindrical body is constant for reasons such as easy handling. Here, as a method for adjusting the amount of water in the discharged to-be-dried object, for example, the amount of moisture in the to-be-dried object to be discharged is adjusted by adjusting the residence time of the to-be-dried object to be discharged in the cylindrical body. There is a way to adjust. This is provided with a to-be-dried object discharge part for discharging the object to be dried which is connected to the inside of the cylindrical body and fixed to the fixed body, and is dried by the cylindrical body to the to-be-dried object discharging part. This is a method of adjusting the residence time of the to-be-dried material to be discharged by forming a channel through which the to-be-dried material is circulated and adjusting the weir height of this channel with a partition plate (for example, patent document) 2).

  Here, when the weir height of the flow path is increased, the material to be dried flowing over the partition plate is difficult to be discharged, so that the material to be dried stays in the cylindrical body. For this reason, the drying time of a to-be-dried object becomes long, and the moisture content in a to-be-dried object decreases. Conversely, when the weir height of the flow path is lowered, the material to be dried is less likely to stay in the cylindrical body, so the drying time is shortened and the amount of water is relatively large. In this way, by adjusting the weir height and appropriately changing the drying time, the amount of moisture in the discharged material to be dried is adjusted.

JP 2002-250590 A JP-A-3-137998

However, the to-be-dried product (processed product) may contain a variable amount of water, and the to-be-dried product to be discharged even if the drying apparatus disclosed in Patent Document 1 and Patent Document 2 is used. There was a problem that the amount of water was not constant.
In particular, in recent years, from the viewpoint of cost reduction and quality stability, it has been required to stabilize the moisture content of the discharged material to be discharged, and more efficiently dry the material to be dried and the moisture content of the material to be dried. There is a need for a drying device that can reduce the variation in the size.

  The present invention has been made in view of the above-described circumstances, and an object of the present invention is to provide a drying apparatus that can stably discharge a material to be dried with a small amount of moisture and can efficiently dry the material. To do.

  In order to solve the above-described problems, a drying apparatus of the present invention includes a fixed body having a cylindrical body having side walls provided at both ends, a rotating shaft that is rotatably inserted in the fixed body, A plurality of stirring blades arranged in the axial direction, and a heat medium flowing through the rotating shaft and the stirring blades is supplied to the object to be dried supplied into the cylindrical body. A drying device that applies heat to the drying object discharge portion provided in the axis of the rotating shaft and dries it, and detects the amount of water in the drying object in the cylindrical body. Detecting means; residence time adjusting means for adjusting the residence time of the material to be dried; thermal energy amount adjusting means for adjusting the heat energy amount of the heat medium; and the residence time adjusting means and the thermal energy amount adjusting means. A control unit for controlling the detection means. The sensed in response to the moisture content of the material to be dried, and the residence time adjusting means and the thermal energy amount adjusting means is characterized by controlling by the control unit.

According to the drying apparatus of the present invention, the moisture content of the material to be dried in the cylindrical body is detected, and the residence time of the material to be dried and the amount of heat energy of the heat medium are controlled by the control unit accordingly. The moisture content of the material to be dried can be adjusted.
That is, when the amount of water in the material to be dried in the cylindrical body is large, the material to be dried stays in the cylindrical body for a long time, and the drying time is lengthened. On the other hand, when the amount of water in the material to be dried in the cylindrical body is small, the residence time in the cylindrical body is shortened to shorten the drying time. By doing in this way, the to-be-dried material with small variation in moisture content can be discharged stably.

  Further, the amount of heat (heat amount) given to the dried object through the rotating shaft and the stirring blade is detected by detecting the moisture content of the dried object in the cylindrical body and adjusting the heat energy amount of the heat medium according to this. ) To adjust the moisture content of the material to be dried. For example, when the amount of moisture in the dried object in the cylindrical body is large, the amount of heat given to the object to be dried is increased, and when the amount of moisture in the dried object is small, the amount of heat given to the object to be dried is reduced. To do. By doing in this way, the moisture content of a to-be-dried object can be reduced efficiently.

As described above, in the drying apparatus of the present invention, the moisture content of the object to be dried in the cylindrical body is detected, and the residence time of the object to be dried and the heat energy amount of the heat medium are controlled accordingly. Therefore, it is possible to stably discharge a material to be dried with a small amount of moisture and dry it efficiently. That is, the object to be dried can be efficiently dried by combining the adjustment of the residence time and the adjustment of the heat energy amount of the heat medium at the same time.
Here, the amount of heat energy of the heat medium is expressed by, for example, the temperature, pressure, supply amount, etc. of the heat medium as parameters, and is appropriately determined according to the composition of the material to be dried and the material of the rotating shaft and the stirring blade A range of parameters can be set.

In the drying apparatus of the present invention, the dwell time adjusting means includes a partition plate that is formed in the drying object discharge portion and prevents the drying object transferred from the cylindrical body, and the drying object It is preferable to include an opening / closing adjustment mechanism that adjusts the weir height of the partition plate according to the amount of moisture and distributes the material to be dried so as to get over the partition plate.
In this case, according to the moisture content of the material to be dried in the cylindrical body, the partition plate adjusts the weir height of the flow path, thereby changing the drying time of the material to be dried discharged from the material discharging unit. . That is, the material to be dried in the flow path is discharged so as to get over the partition plate. Therefore, if the weir height by the partition plate is increased, the material to be dried gets over the partition plate, so the drying time of the material to be dried is increased. become longer. On the other hand, when the weir height of the flow path by the partition plate is lowered, the drying time of the object to be dried is shortened. In this way, the drying time of the material to be dried in the cylindrical body can be adjusted.

Furthermore, it is preferable that the opening / closing adjustment mechanism has an opening through which the material to be dried passes over the partition plate when the weir height of the partition plate is set to the maximum.
In this case, even if the weir height is set to the maximum, the material to be dried can be circulated from the opening, and the partition plate can be prevented from being overloaded. It is also possible to prevent a large amount of material to be dried from flowing to the outlet at a time and prevent the material to be dried from clogging the outlet.

Furthermore, it is preferable that the detection means measures the temperature of the object to be dried supplied into the cylindrical body and derives the moisture content of the object to be dried based on the temperature.
In this case, the temperature of the material to be dried inside the cylindrical body can be measured, the moisture content of the material to be dried can be derived from this temperature, and the drying time (residence time) of the material to be dried can be adjusted. Note that the moisture content in the material to be dried and the temperature of the material to be dried have a correlation in a state where the drying of the material to be dried has progressed to some extent. It is possible to calculate the amount of water in the object.

Further, the detection means measures the temperature of exhaust gas that flows through the cylindrical body and exhausts to the outside including water vapor generated from the object to be dried, and based on the temperature, moisture of the object to be dried It may be configured to derive the quantity.
In this case, the temperature of the exhaust gas flowing through the inside of the cylindrical body and exhausted to the outside including water vapor generated from the object to be dried is measured, and the moisture content of the object to be dried is derived from this temperature. The drying time (residence time) can be adjusted. Since the moisture content in the object to be dried and the temperature of the exhaust gas are correlated, it is possible to calculate the moisture content in the object to be dried by detecting the temperature of the exhaust gas. .

The detection means includes first detection means for measuring the temperature of the object to be dried supplied to the inside of the cylindrical body, and water vapor generated from the object to be dried through the inside of the cylindrical body. Second detection means for measuring the temperature of exhaust gas exhausted to the outside, and the temperature of the object to be dried measured by the first detection means and the exhaust gas measured by the second detection means The moisture content of the material to be dried may be derived on the basis of the temperature.
In this case, based on the temperature of the material to be dried supplied to the inside of the cylindrical body and the temperature of the exhaust gas flowing through the inside of the cylindrical body and exhausted to the outside including water vapor generated from the material to be dried. In addition, since it is configured to control the time during which the material to be dried stays inside the cylindrical body and the amount of heat energy of the heat medium, the stay time and the amount of energy of the heat medium can be controlled more appropriately, Furthermore, it becomes possible to reduce the variation in the moisture content of the material to be dried.

Further, the heat medium is any one selected from steam, heat medium oil, and hot water, and the amount of heat energy is controlled by controlling at least one of temperature, pressure, and flow rate of the heat medium. Is preferably adjusted.
When the heat medium is selected from steam, heat medium oil, and hot water, the temperature, pressure, or flow rate can be set relatively easily, so that the amount of heat energy can be easily controlled. is there.

  ADVANTAGE OF THE INVENTION According to this invention, the drying apparatus which can discharge | emit stably and dry efficiently the to-be-dried material with the small dispersion | variation in a moisture content can be provided.

It is a top view which shows the drying apparatus which concerns on embodiment of this invention. It is XX arrow sectional drawing of FIG. It is a YY arrow sectional drawing of FIG. It is a block diagram which shows a residence time adjustment means and a heat energy amount adjustment means in the drying apparatus which concerns on one Embodiment.

Embodiments of the present invention will be described below with reference to the accompanying drawings.
The drying device 1 in the present embodiment is a drying device that employs an indirect drying method, and as shown in FIG. 1, a hollow fixed body 2 and a rotary shaft 3 that is rotatably inserted into the fixed body 2. And a plurality of stirring blades 22 connected in the axial direction of the rotating shaft 3 and detection means (first temperature sensors 15A to 15C, second temperature) for detecting the amount of moisture in the object to be dried in the stationary body 2. Sensor 16), to-be-dried material discharge unit 4 provided on fixed body 2 for discharging the to-be-dried material inside fixed body 2, and residence time for adjusting the residence time of the to-be-dried material from to-be-dried material discharge unit 4 An adjusting means 5 (see FIG. 2), a thermal energy amount adjusting means 6 for controlling the heat energy amount of the heat medium flowing into the rotating shaft 3, a control panel for controlling the residence time adjusting means 5 and the heat energy amount adjusting means 6. (Control unit) 46.

  Here, the amount of heat energy of the heat medium is expressed by, for example, the temperature, pressure, flow rate, etc. of the heat medium as parameters, and the range of the parameters is appropriately set according to the drying characteristics of the object to be dried. Can do. In the drying apparatus 1 of the present embodiment, steam is used as the heat medium.

The fixed body 2 is provided so as to cover a cylindrical body 13 which is placed horizontally and has a side wall (one side wall) 11 and a side wall (the other side wall) 12 at both ends, and an outer peripheral surface of the cylindrical body 13. And a jacket 23.
The cylindrical body 13 has a cylindrical shape and is provided with an object to be dried inlet 13A for supplying an object to be dried on the upper surface on the side wall 11 side, and is to be dried which is transferred in the cylindrical body 13 to the side wall 12 side. A to-be-dried object discharge unit 4 for discharging the object is provided. Here, the to-be-dried material inlet 13 </ b> A is provided slightly closer to the side wall 12 than the side wall 11. In addition, the material to be dried is transferred in the direction of arrow W in the cylindrical body.

The cylindrical body 13 is provided with a plurality of fixing plates 14 from the upper inner peripheral surface toward the axis of the rotary shaft 3. The plurality of fixing plates 14 are provided so as to protrude between a plurality of stirring blades 22 described later.
Furthermore, as shown in FIG. 2, one or more first temperature sensors (first detection means) 15 </ b> A to 15 </ b> C for detecting the temperature of the object to be dried inside the cylindrical body 13 are provided inside the cylindrical body 13. Is provided. The first temperature sensor 15 </ b> C is provided on the inner peripheral surface of the cylindrical body 13 in the vicinity of the dried product discharger 4.

The first temperature sensors 15 </ b> A to 15 </ b> C are configured to notify the control panel 46 described later of the detection result of the temperature of the object to be dried inside the cylindrical body 13. Three first temperature sensors are arranged. In this embodiment, the first temperature sensor 15C is selected from the three sensors (first temperature sensors 15A, 15B, and 15C) to detect the temperature. The result is notified to the control panel 46.
The jacket 23 is configured such that steam (heat medium) is introduced from the steam inlet 23A, and the steam flowing through the jacket 23 is discharged from the steam outlet 23B.

Here, in the present embodiment, one end of the cylindrical body 13 on the side where the material to be dried inlet 13A is provided is referred to as an upstream end, and one end on the side where the material to be dried discharge portion 4 is provided is referred to as a downstream end.
Further, the cylindrical body 13 is provided with a moisture exhaust port 13B for exhausting water vapor generated by heating an object to be dried and an air inlet 13C for introducing air (carrier gas) into the cylindrical body 13. ing. That is, water vapor generated from the material to be dried is carried to the moisture exhaust port 13B by the carrier gas introduced from the air introduction port 13C and exhausted to the outside of the cylindrical body 13. In the present embodiment, a second temperature sensor (second detection means) 16 that detects the temperature of the exhaust gas (carrier gas) exhausted from the cylindrical body 13 is provided in the vicinity of the inner peripheral surface of the moisture exhaust port 13B. Is provided.
The second temperature sensor 16 is configured to notify the control panel 46 described later of the detection result of the temperature of the exhaust gas (carrier gas) exhausted from the cylindrical body.
In the present embodiment, the detection means includes the first temperature sensors 15 </ b> A to 15 </ b> C and the second temperature sensor 16.

The rotating shaft 3 is rotatable in the direction of arrow A shown in FIG. 1 by a power source (not shown) provided outside the fixed body 2.
The rotating shaft 3 has a cylindrical shape, and both end portions thereof extend through the side walls 11 and 12 of the fixed body 2. The rotary shaft 3 is provided with a steam inlet 3 </ b> A for introducing steam S <b> 1 as a heat medium into the rotary shaft 3 outside the fixed body 2. The steam S1 flows through the rotary shaft 3 and is discharged as drain S2.

  The plurality of stirring blades 22 are provided to increase the contact area with the material to be dried supplied to the inside of the cylindrical body 13 and are arranged at equal intervals. Further, the stirring blade 22 has a hollow disk shape, and the steam S <b> 1 flowing through the rotating shaft 3 can also flow through the stirring blade 22.

  As shown in FIGS. 2 and 3, the to-be-dried material discharge unit 4 has a hollow box shape continuously provided on the peripheral surface of the cylindrical body 13, and includes a transition unit 31 and a discharge unit 32. Has been. And the flow path through which the to-be-dried material transferred from the cylindrical body 13 distribute | circulates the inside of the to-be-dried material discharge part 4 is formed.

The transition part 31 is connected to the inside of the tubular body 13 via a connection opening 13D formed on the peripheral surface of the tubular body 13, and the material to be dried inside the tubular body 13 is transferred from the connection opening 13D. Is done.
The discharge unit 32 discharges the material to be dried transferred from the transition unit 31 from the material to be dried discharge port 4A. Here, between the transition part 31 and the discharge part 32, the partition plate 33 which adjusts the weir height of the flow path which connects the transition part 31 and the discharge part 32 is provided.

  As shown in FIGS. 2 and 3, the residence time adjusting means 5 includes a partition plate 33 and an opening / closing adjustment mechanism 34, and the partition plate 33 and the opening / closing adjustment mechanism 34 are controlled by a control panel 46. It is configured.

  As shown in FIGS. 2 and 3, the partition plate 33 is a rectangular plate-like member, and is provided over the width direction inside the dry matter discharge portion 4. The partition plate 33 is within the range indicated by the two-dot chain line in FIG. 2 in the direction perpendicular to the horizontal plane, as indicated by the arrow B direction in FIG. It can be moved up and down. Further, when the partition plate 33 is moved upward by the opening / closing adjustment mechanism 34, the weir height of the flow path between the transition portion 31 and the discharge portion 32 is increased, and the partition plate 33 is moved downward. And the weir height of the flow path is configured to be low.

  The opening / closing adjustment mechanism 34 extends in the vertical direction inside the object to be dried discharge portion 4, and is paired with a pair of poles 41, a rack 42, a pair of pinions 43, The shaft 44 and a motor 45 (see FIG. 4) for driving the rotating shaft 44 are configured. The motor 45 is controlled by the control panel 46.

The pair of poles 41 are provided in the up-down direction of the to-be-dried object discharge unit 4, and are arranged at intervals along the axial direction of the rotation shaft 3. And the pole 41 is accommodated in the pole accommodating part 4B provided in the upper part of the to-be-dried material discharge | emission part 4 at the upper part. Upper and lower rack detection sensors 47A and 47B for detecting that the rack 42 is located at the upper limit or the lower limit are provided on either one of the upper end and the lower end of the pole housing portion 4B.
These upper and lower rack detection sensors 47A and 47B notify the control panel 46 of the presence or absence of the detection plate 42A provided at the tip of the rack 42 at the upper end or the lower end in the pole housing 4B. It is configured.

  The rack 42 and the pole 41 are configured to be movable up and down within the range of the chain double-dashed line shown in FIG. 2 in the same manner as the partition plate 33, and the partition plate 33 is attached and fixed below. The rack 42 and the pole 41 are configured to be detected by upper and lower rack detection sensors 47A and 47B provided in the pole housing portion 4B by moving up and down.

Here, the upper rack detection sensor 47A has the detection plate 42A when the partition plate 33 that moves upward with the rack 42 closes the flow path between the transition portion 31 and the discharge portion 32. Is detected and notified to the control panel 46 to that effect.
Further, the lower rack detection sensor 47B is configured to detect the presence of the detection plate 42A when the partition plate 33 fully opens the flow path and notify the control panel 46 to that effect.

In the present embodiment, when the flow path is closed, the flow path is not completely closed, and at least an opening 49 through which the material to be dried passes over the partition plate 33 is formed. It is configured. That is, even if the height of the partition plate 33 is set to the maximum height, the opening 49 is formed.
The maximum height of the partition plate 33 is detected by providing a height detection sensor in the transition portion 31 for detecting the height of the partition plate 33, and the opening / closing adjustment mechanism 34 is determined based on the detection result of the height. Thus, the height of the partition plate may be limited.

  The rotation shaft 44 has a shaft center parallel to the shaft center of the rotation shaft 3, and is provided with a pair of pinions 43 that respectively mesh with the pair of racks 42. The rotating shaft 44 can be rotated in the direction of arrow C shown in FIGS. 2 and 3 by the motor 45, and the rack 42 and the pole 41 that mesh with the pinion 43 move up and down by rotating. The rotary shaft 44 is provided with a rotary encoder 48 that detects the amount of rotation of the rotary shaft 44. The rotary encoder 48 is configured to notify the control panel 46 of the rotation amount of the rotary shaft 44.

The thermal energy amount adjusting means 6 is for adjusting the thermal energy amount of the steam S1 flowing into the rotary shaft 3 from the steam inlet 3A. The thermal energy amount adjusting means 6 includes, for example, a temperature adjuster that adjusts the temperature of the steam S1 in the steam supply source of the steam S1 that flows into the rotating shaft 3, a flow rate adjuster that adjusts the flow rate, and a pressure adjustment that adjusts the pressure. With a bowl. These temperature regulator, flow rate precision device, and pressure regulator are controlled by a control panel 46.
The heat energy amount adjusting means 6 controls the amount of heat energy of the steam S1 by adjusting the temperature, pressure, and flow rate of the steam S1.

In the control panel 46, information on the raw material of the material to be dried to be supplied, the temperature of the material to be dried corresponding to a desired amount of moisture in the material to be dried after the drying process, and the like can be input in advance.
Further, a database describing the correlation of the moisture content with respect to the temperature of the object to be dried and the temperature of the exhaust gas (carrier gas) is stored in a storage medium (not shown) such as a hard disk drive. The control panel 46 determines whether the object to be dried is detected based on the input raw material information and the detection result of the temperature of the object to be dried and the temperature of the exhaust gas (carrier gas) by the first temperature sensor 15C and the second temperature sensor 16. It is configured to read out the moisture content in the object from the above-mentioned storage medium.

  Then, the control panel 46 derives the moisture content in the material to be dried from the detection results of the first temperature sensor 15C and the second temperature sensor 16, and compares it with the moisture content in the material to be dried after the drying process inputted in advance. To do. Next, based on this comparison, the rotating shaft 44 is rotated with respect to the motor 45 that rotationally drives the rotating shaft 44 so that the moisture content of the material to be dried becomes a desired amount, and the weir of the flow path by the partition plate 33 is achieved. The stop height and the amount of heat energy (temperature, pressure, and flow rate) of the steam S1 flowing into the rotating shaft 44 are controlled. The control panel 46 also refers to the detection result of the rotation amount of the rotating shaft 44 detected by the rotary encoder 48, and the appropriate height of the weir height by the partition plate 33 and the appropriate amount of heat energy of the steam S1. Judging.

Next, a method for drying an object to be dried (processed object) using the drying apparatus 1 having the above-described configuration will be described.
First, the steam S1, which is a heat medium, is introduced into the rotating shaft 3 from the steam inlet 3A. Thereby, the several stirring blade 22 is heated by the vapor | steam S1 which distribute | circulates an inside. In addition, the cylindrical body 13 is heated by introducing steam as a heat medium into the jacket 23 from the steam inlet 23A. And the rotating shaft 3 is rotated. At this time, information on the raw material of the material to be dried to be supplied and the temperature of the material to be dried corresponding to the desired amount of moisture after the drying process are input to the control panel 46.

  Then, the material to be dried is supplied from the material to be dried inlet 13A. The supplied to-be-dried material is placed on the lower inner peripheral surface of the cylindrical body 13, and is sent out from the upstream side toward the downstream side as the rotating shaft 3 rotates. At this time, the material to be dried comes into contact with the inner peripheral surface of the rotating shaft 3 and the stirring blades 22 and the jacket 23 of the cylindrical body 13 heated by the steam, and the moisture in the material to be dried evaporates. Dried. Further, water vapor or the like generated from the material to be dried by drying the material to be dried is mixed with air (carrier gas) flowing through the inside of the cylindrical body 13, and is discharged from the moisture exhaust port 13 </ b> B as exhaust gas. It is discharged outside.

  The to-be-dried material transferred to the vicinity of the connection opening 13D is lifted along the inner peripheral surface of the cylindrical body 13 by the rotation of the stirring blade 22, and the transferred material discharge unit 4 is transferred from the inside of the cylindrical body 13. It is transferred to the unit 31. And the to-be-dried material transferred is transferred from the transition part 31 to the discharge part 32 so as to get over the partition plate 33 and discharged from the to-be-dried object discharge port 4A.

A first object provided on the inner peripheral surface of the tubular body 13 and in the vicinity of the dried object discharge portion 4 while the object to be dried is transported downstream while being stirred and dried inside the tubular body 13. The temperature sensors 15 </ b> A to 15 </ b> C detect the temperature of the object to be dried inside the cylindrical body 13 and notify the control panel 46 of the detection result. Here, the first temperature sensors 15A to 15C can be selected and used from among the three temperature sensors. In the present embodiment, the first temperature sensor 15 is selected from the three temperature sensors.
Further, while the material to be dried is transferred downstream, the second temperature sensor 16 provided in the vicinity of the inner peripheral surface of the moisture exhaust port 13B detects the temperature of the exhaust gas and controls the detection result. The board 46 is notified.

And the control board 46 calculates the moisture content in the to-be-dried material inside the cylindrical body 13 from the information of the raw material of the to-be-dried material input and the temperature detected by the first temperature sensor 15C and the second temperature sensor 16. It calculates with reference to the above-mentioned database, and compares the input moisture content after the drying process with the moisture content in the material to be dried calculated from the database.
In addition, in the state in which the to-be-dried object was dried to some extent inside the cylindrical body 13, since there is a correlation between the moisture content in the to-be-dried object and the temperature of the to-be-dried object, the temperature of the to-be-dried object From this, the amount of water in the material to be dried can be derived.

Here, when the moisture content of the material to be dried calculated by the control panel 46 is deviated from the desired moisture content, the residence time adjusting means 5 and the thermal energy amount adjusting means 6 are controlled together. The moisture content of the material to be dried is adjusted to a desired moisture content.
More specifically, when it is determined that the moisture content in the material to be dried calculated by the control panel 46 is higher than the desired moisture content, the motor 45 is controlled so that the rotating shaft 44 rotates by a predetermined number of revolutions. When driving, the partition plate 33 is moved upward along the pole 41, and the temperature, pressure, and flow rate of the steam S1 are set high to increase the heat energy amount of the steam S1.

Here, the control panel 46 determines the weir height by the partition plate 33 based on the detection result of the rotation amount of the rotary shaft 44 detected by the rotary encoder 48, and controls the partition plate 33 to a predetermined height. doing.
When the upper rack detection sensor 47A detects the presence of the detection plate 42A, the control panel 46 determines that the flow path is closed by the partition plate 33 during the rotation of the rotation shaft 44, and the rotation of the rotation shaft 44 is determined. Stop. In the present embodiment, the opening 49 is formed even if the height of the partition plate 33 is set to the maximum height.

When the partition plate 33 is moved upward, the weir height of the flow path of the to-be-dried material discharge unit 4 by the partition plate 33 increases, so that the material to be dried transferred to the transition unit 31 gets over the partition plate 33. It becomes difficult. Accordingly, the material to be dried stays in the cylindrical body 13 for a long time from when the material to be dried is discharged until it is discharged, and the drying time for the material to be dried becomes longer. Thereby, the to-be-dried object which remains in the inside of the cylindrical body 13 is heated by contacting with the rotating shaft 3, the stirring blade 22, and the inner peripheral surface of the jacket 23 of the cylindrical body 13, and in the to-be-dried object The water evaporates and becomes more dry.
Even when the height of the weir is adjusted, the first temperature sensor 15C and the second temperature sensor 16 detect the temperature of the object to be dried and the temperature of the exhaust gas inside the cylindrical body 13, and the detection results are displayed. Notify the control panel 46.

Further, when the temperature, pressure, and flow rate of the steam S1 are set high, the heating temperature of the rotating shaft 3 and the stirring blade 22 increases, and the heat given to the material to be dried that contacts the rotating shaft 3 and the stirring blade 22 increases. Thus, the moisture in the material to be dried evaporates and is dried faster.
Even when adjusting the temperature, pressure, and flow rate of the steam S1, the first temperature sensor 15C and the second temperature sensor 16 detect the temperature of the object to be dried and the temperature of the exhaust gas inside the cylindrical body 13. The detection result is notified to the control panel 46.

On the other hand, when it is determined that the moisture content in the material to be dried calculated by the control panel 46 is lower than the desired moisture content, the motor 45 is driven so that the rotating shaft 44 rotates by a predetermined number of revolutions, The plate 33 is moved downward along the pole 41, and the temperature, pressure, and flow rate of the steam S1 are set low to set the heat energy amount of the steam S1 small.
As described above, the control panel 46 determines that the flow path has been fully opened by the partition plate 33 during the rotation of the rotary shaft 44 when the lower rack detection sensor 47B detects the presence of the detection plate 42A. The rotation of the rotating shaft 44 is stopped.

When the partition plate 33 is moved downward, the weir height of the flow path of the to-be-dried material discharge unit 4 by the partition plate 33 is lowered, so that the to-be-dried material transferred to the transition unit 31 gets over the partition plate 33. It becomes easy. Accordingly, the material to be dried is easily transferred from the tubular body 13 toward the material to be dried discharge section 4 and the residence time in the tubular body 13 is shortened. Moreover, the drying time with respect to the to-be-dried object in the cylindrical body 13 becomes short.
Furthermore, when the temperature, pressure, and flow rate of the steam S1 are set low, the temperature of the rotating shaft 3 and the stirring blade 22 is lowered, and the drying target that contacts the rotating shaft 3, the stirring blade 22, and the jacket 23 of the cylindrical body 13 is reduced. Since the heat given to the object to be dried that comes into contact with the object is reduced, the evaporation of moisture in the object to be dried is reduced, and the moisture content of the object to be dried approaches the desired amount of moisture.

  As described above, the moisture content of the material to be dried inside the cylindrical body 13 is derived from the detection results of the first temperature sensor 15C and the second temperature sensor 16, and the partition plate is based on the derived moisture content result. The to-be-dried object is dried while adjusting the weir height by 33 and the temperature, pressure, and flow rate of the steam S1 to control the drying time of the to-be-dried object. When notifying the control panel 46 of the temperatures detected from the three temperature sensors of the first temperature sensors 15A to 15C, based on the average temperature of the three temperature sensors, for example, What is necessary is just to derive the moisture content of the dried product.

  According to the drying apparatus 1 according to the present embodiment configured as described above, the moisture content of the material to be dried inside the cylindrical body 13 is derived, and the height of the partition plate 33 is controlled from this moisture content. The moisture content of the object to be dried can be adjusted by adjusting the residence time of the object to be dried and controlling the amount of heat energy of the heat medium flowing through the rotating shaft 3 by the control panel 46. Furthermore, it is possible to stably discharge a material to be dried with a small variation in water content and to dry it efficiently.

  Furthermore, in this embodiment, the moisture content of the material to be dried is derived based on the temperature of the material to be dried and the temperature of the exhaust gas, and the material to be dried is inside the cylindrical body 13 according to the derived moisture content. The residence time and the temperature, pressure, and flow rate of the steam S1 are adjusted, so that the residence time and the energy amount of the heat medium can be controlled more appropriately, and the moisture content of the material to be dried It is possible to reduce the variation of the.

  Further, in this embodiment, the opening 49 is formed even when the weir height of the partition plate 33 is set to the maximum, so that the object to be dried is prevented from accumulating inside the cylindrical body 13, and the object to be dried is dried. It is possible to reliably distribute things and prevent the partition plate 33 from being overloaded. Further, it is possible to prevent a large amount of material to be dried from flowing to the material to be dried discharge unit 4 at a time, and to prevent the material to be dried from clogging the material to be dried discharge unit 4.

  Furthermore, in the present embodiment, the material to be dried can be efficiently and quickly dried by the heat of both the steam S1 flowing through the rotary shaft 3 and the stirring blade 22 and the steam flowing through the jacket 23.

  As mentioned above, although embodiment of this invention was described, this invention is not limited to the said embodiment, A various change can be added in the range which does not deviate from the meaning of this invention.

  For example, in the above embodiment, the moisture content of the material to be dried is derived from the detection results of the first temperature sensor 15C (first detection means) and the second temperature sensor 16 (second detection means) provided in the drying apparatus 1. However, you may derive | lead-out the moisture content of a to-be-dried object by the detection means of only any sensor among the 1st temperature sensors 15A-15C or a 2nd temperature sensor.

In the above embodiment, the case where the heat energy amount is adjusted by adjusting the temperature, pressure, and flow rate using steam as the heat medium has been described. However, any one of the temperature, pressure, and flow rate is adjusted. It may be configured to.
Moreover, in the said embodiment, although steam was used as a heat medium, you may use other heat media, such as heat-medium oil and warm water.
Moreover, although the said embodiment demonstrated the case where the amount of thermal energy of the heat medium which flows in into the inside of a rotating shaft and a stirring blade was demonstrated, it may be set as the structure which also adjusts the amount of thermal energy which flows through the inside of a jacket simultaneously. .

Moreover, although the first temperature sensors 15A to 15C are used as the first detection means, for example, other sensors such as a humidity detection sensor that detects humidity in the cylindrical body 13 and a moisture detection sensor that detects moisture are used. May be.
Also. In this embodiment, although the case where three 1st temperature sensors are arrange | positioned was demonstrated, at least 1 or more should just be arrange | positioned.

In addition, the control panel 46 is configured to read out the moisture content in the object to be dried from the storage medium in which the database is stored, but the temperature of the object to be dried and the temperature by the first temperature sensor or the second temperature sensor are adjusted. You may comprise so that the moisture content in to-be-dried material may be computed and derived | led-out from a detection result.
Further, although the fixed plate 14 is provided on the inner peripheral surface of the cylindrical body 13, a configuration in which the fixed plate 14 is not provided may be employed.

DESCRIPTION OF SYMBOLS 1 Drying apparatus 2 Fixed body 3 Rotating shaft 4 To-be-dried substance discharge part 5 Residence time adjustment means 6 Thermal energy amount adjustment means 13 Cylindrical body 15A, 15B, 15C 1st temperature sensor (1st detection means)
16 Second temperature sensor (second detection means)
22 Stirrer blade 33 Partition plate 34 Opening and closing adjustment mechanism 46 Control panel (control unit)

Claims (7)

A fixed body having a cylindrical body with side walls provided at both ends, a rotating shaft rotatably inserted in the fixed body, and a plurality of stirring blades connected in the axial direction of the rotating shaft, The rotating shaft and the stirring blade are supplied with a heat medium that circulates inside, and the object to be dried supplied to the cylindrical body is directed toward the object to be dried provided in the fixed body. A drying device that heats and dries while transporting in the axial direction,
Detecting means for detecting the amount of water in the material to be dried in the cylindrical body;
A residence time adjusting means for adjusting the residence time of the material to be dried;
A heat energy amount adjusting means for adjusting a heat energy amount of the heat medium;
A control unit for controlling the residence time adjusting means and the thermal energy amount adjusting means,
The drying apparatus, wherein the dwell time adjusting unit and the thermal energy amount adjusting unit are controlled by the control unit in accordance with a moisture content of the object to be dried detected by the detecting unit. The residence time adjusting means is a partition plate that is formed in the dry matter discharge section and prevents the dry matter that has been transferred from the cylindrical body;
An opening / closing adjustment mechanism that adjusts the weir height of the partition plate according to the moisture content of the material to be dried, and distributes the material to be dried so as to get over the partition plate;
The drying apparatus according to claim 1, comprising:   The said opening / closing adjustment mechanism has an opening part through which the said to-be-dried object passes over the said partition plate, and distribute | circulates, when the dam height of the said partition plate is set to the maximum. Drying equipment.   The said detection means measures the temperature of the said to-be-dried material supplied into the said cylindrical body, and derives | leads-out the moisture content of the to-be-dried material based on this temperature. 4. The drying apparatus according to any one of 3. The detection means is
Measuring the temperature of exhaust gas that flows through the cylindrical body and exhausts to the outside including water vapor generated from the object to be dried, and derives the moisture content of the object to be dried based on the temperature. The drying apparatus according to any one of claims 1 to 3. The detection means is
First detection means for measuring the temperature of the material to be dried supplied into the cylindrical body;
A second detection means for measuring the temperature of the exhaust gas that flows through the cylindrical body and contains water vapor generated from the material to be dried and exhausted to the outside, and
Deriving the moisture content of the object to be dried based on the temperature of the object to be dried measured by the first detection means and the temperature of the exhaust gas measured by the second detection means; The drying apparatus according to any one of claims 1 to 3. The heat medium is any one selected from steam, heat medium oil, and hot water,
The drying apparatus according to any one of claims 1 to 6, wherein the amount of heat energy is adjusted by controlling at least one of temperature, pressure, and flow rate of the heat medium. .

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