JPH08285455A - Water-containing substance drying treatment apparatus and water-containing substance drying treatment method - Google Patents

Abstract

(57) [Summary] [Purpose] Efficiently load even a water-containing material such as bulky garbage into the drying tank to perform the drying process efficiently. A drying tank 2 for containing a water-containing substance inside, a spiral stirring blade 6 provided in the drying tank and rotatable along an inner wall, and having a space along the up-down direction, and a stirring blade are provided. The motor 8 to rotate, the heating devices 13, 17 and 19 for heating the inside of the drying tank, the cooler 23 which is connected to the drying tank so as to communicate with each other and cools the vaporized gas inside to recover the liquid component, and starts the operation. In the initial stage, the stirring blade is rotated in the reverse direction, and thereafter, the stirring blade is rotated in the forward direction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water-containing material drying treatment apparatus for drying water-containing materials such as raw garbage, and particularly, it is possible to efficiently take bulky raw garbage into a drying tank for the drying treatment. It is made possible and is suitable for use in a food product processing industry such as a marine product processing industry where a large amount of water-containing substances are generated, and a supermarket.

[0002]

2. Description of the Related Art Various types of drying apparatus for water-containing substances such as raw garbage have been developed in the past.
It is disclosed in Japanese Utility Model Publication No. 4-131500.

The "dryer having a vertical spiral rotary blade" disclosed in Japanese Utility Model Laid-Open No. 19501/1991 has a vertical spiral rotary blade having a flat upper surface in a drying tank.
By heating the wall surface of the drying tank and rotating the vertical spiral rotary blade, the liquid and semi-solid material to be dried contained in the drying tank is dried with stirring. In this "dryer with vertical spiral rotary blades", a boiler that generates steam is used as a means for heating the wall surface of the drying tank, and the steam generated by the boiler is used in the heating chamber provided on the outer periphery of the drying tank. It is introduced into and the peripheral wall of the drying tank is heated.

The "drying device having a vertical spiral rotary blade" disclosed in Japanese Utility Model Laid-Open No. 4-131500 has substantially the same device configuration as the "drying device having a vertical spiral rotary blade" described above, and heats it. As a means, a heating element that generates resistance heating using electricity is adopted, and this heating element is arranged on the outer periphery of the drying tank to heat the peripheral wall of the drying tank.

[0005]

However, the above-mentioned conventional water-containing material drying treatment apparatus is provided with the vertical spiral rotary blade inside the drying tank, and since the shaft and the arm of the spiral rotary blade are provided, it is bulky to be dried. Items such as cabbage, Chinese cabbage, open leaves of lettuce, cauliflower and broccoli leaves, which are generated in large quantities in supermarkets, etc., are thrown in at once from the input port, and are caught on the way before they fall to the bottom of the drying tank. Therefore, even if the capacity of the drying tank is large, only a fraction of the material to be dried can be put in, and the efficiency is poor. Then, when the operation is started and the vertical spiral rotary blade is rotated, the leaves of cabbage and the like rise along the wall surface, and those that have risen to the apex are caught in the middle of the vertical spiral rotary blade while falling. In some cases, it will fall and will not fall to the bottom. Therefore, the stirring function of the vertical spiral rotary blade cannot be fully exerted, and there is a problem that the efficiency of the drying process is reduced.

Further, in the above-mentioned conventional drying processing apparatus, since the evaporative gas is sucked by the suction force of the suction blower, a bad odor on the exhaust side of the blower has been a problem.

The present invention has been proposed in view of the above-mentioned problems of the prior art. The object of the present invention is to efficiently load even a water-containing material such as bulky garbage into a drying tank. An object of the present invention is to provide a hydrate-containing material drying treatment apparatus and a drying treatment method capable of efficiently performing a drying treatment.

[0008]

In order to achieve the above-mentioned object, the invention according to claim 1 has a drying tank for accommodating a water-containing substance therein, and a drying tank provided in the drying tank, wherein an inner wall of the drying tank is provided. A spiral stirring blade that is rotatable along the vertical direction of the center of rotation, a rotation drive device that rotates the stirring blade, and a heating device that heats the inside of the drying tank. , A cooler which is connected to the drying tank and cools the evaporative gas generated in the drying tank to recover the liquid component, and the stirring blade is rotated in the reverse direction at the beginning of the operation, and then the stirring blade is normally rotated. A water-containing substance drying treatment apparatus comprising: a control device that controls the rotation drive device so as to rotate.

In addition to the structure according to claim 1, the invention according to claim 2 is characterized in that a vacuum generating device for reducing the pressure inside the drying device is provided in communication with the drying tank. It is a dry processing device.

In addition to the configuration according to claim 2, the invention according to claim 3 is such that, in the vacuum generating device, a recovered liquid circulation path connected to the recovered liquid discharge path of the cooler and the recovered liquid. A recovery liquid circulation tank provided in the middle of the circulation path,
An ejector provided in the middle of the recovery liquid circulation path,
It is a water-containing material drying treatment apparatus, characterized in that it is provided in the middle of the recovery liquid circulation path, and comprises a recovery liquid circulation pump for circulating the recovery liquid in the recovery liquid circulation path.

Further, the invention according to claim 4 is provided in the drying tank, is rotatable along the inner wall of the drying tank, and has a space having a space along the vertical direction of the center of rotation. While rotating the stirring blade in the reverse direction, the water-containing material descending step of lowering the water-containing material charged from the charging port, and decompressing the inside of the drying tank while rotating the stirring blade in the normal state with the lid member of the charging port closed. A heating and drying step of heating and drying the water-containing material, and a step of removing the material to be dried to the outside of the drying tank after returning the inside of the drying tank to atmospheric pressure, by a water-containing material drying treatment method characterized by the following: is there.

[0012]

In the water-containing material drying treatment apparatus described in claim 1, since the stirring blade rotates in the reverse direction under the control of the control device at the initial stage when the operation of the apparatus is started, when the water-containing material is fed through the charging port, these water-containing materials are treated. The object is drawn downward by the reverse rotation of the stirring blade. Therefore, even a bulky water-containing substance such as vegetable waste is mechanically taken into the drying tank without waste.

When the water-containing substance is contained in the drying tank and the stirring blade returns to the normal rotation by the control of the control device and rotates, the heating device heats the inside of the drying tank. By the normal rotation of the stirring blade, it rises along the inner wall of the drying tank, and when it reaches the uppermost portion of the stirring blade, it drops through the space provided in the central portion of the stirring blade. Then, the water-containing material is repeatedly heated and lowered, and is gradually heated and dried.

Then, the evaporative gas generated in the drying tank is introduced into a cooler to be cooled and recovered as a liquid component.

The material to be dried which has been dried after the drying treatment is
It is taken out of the drying tank through an outlet provided at the bottom of the drying tank.

According to the second aspect of the invention, a vacuum generator is connected in communication with the drying tank to reduce the pressure inside the drying tank. Therefore, the evaporation temperature of water decreases compared to the case of performing the drying treatment of the water-containing substance under atmospheric pressure, and even if the temperature inside the drying tank is kept low, efficient drying is possible, and the drying treatment of the water-containing substance can be performed. It can be performed safely and the durability of the device is improved. Further, it is possible to suppress the oxidization of the water-containing substance in the drying tank and suppress the generation of the malodorous component. Further, when the dried hydrate is used for feed, etc., the oxidation of the hydrate is suppressed, so that the quality of the product is improved.

According to the third aspect of the invention, a device using an ejector is used as a vacuum generating device, and a negative pressure generated when the recovered liquid pressure-fed by the recovered liquid circulation pump passes through the nozzle portion of the ejector. This reduces the pressure inside the drying tank. Therefore, since no suction blower or the like is used, the evaporative gas does not leak out of the vacuum generating device, and the malodorous component contained in the evaporative gas does not diffuse out of the device.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. 1 and 2 show a water-containing substance drying treatment apparatus according to an embodiment of the present invention. FIG. 1 is a schematic configuration diagram of the water-containing substance drying treatment apparatus, and FIG. 2 is a perspective view of a stirring blade.

The water-containing material drying treatment apparatus 1 according to the present invention has a drying tank 2 for containing water-containing materials such as raw garbage. The drying tank 2 has a cylindrical shape with an inlet 2'opened on the upper surface and a closed bottom, and a lid member 3 is attached to the open upper surface of the drying tank 2 so as to be openable and closable. Therefore, in order to add the water-containing material into the drying tank 2, the lid member 3 may be opened and the water-containing material may be supplied through the charging port 2 '. In addition, the inlet 2 '
A sealing material (not shown) is interposed between the cover member 3 and the lid member 3 to keep airtightness, and the water-containing material drying treatment apparatus 1 is in operation,
Suction air from the gap between the upper open surface and the lid member 3,
Alternatively, evaporative gas and bad odor are not leaked.

A rotary shaft 4 is inserted into the drying tank 2 so as to penetrate substantially the center of the bottom surface of the drying tank 2.
The spiral stirring blades 6 rotating along the inner wall of the drying tank 2 are attached to the tips of the plurality of connecting rods 5 extending downward from the inner wall of the drying tank 2 toward the inner wall of the drying tank 2. A space 7 is provided between the stirring blade 6 and the stirring blade 6 along the vertical direction of the rotating shaft 4. A motor 8 with a speed reducer, which functions as a rotation drive device, is connected to the lower end of the rotary shaft 4 protruding from the bottom of the drying tank 2 to the outside of the drying tank 2.

As shown in FIG. 2, the stirring blade 6 is a spiral plate having a substantially flat upper surface. Therefore, when the anticlockwise rotation in the direction of arrow A in FIG. 2 is performed in the clockwise direction, the water-containing substance can be placed on the pumping surface of the upper surface and pumped from the lower part to the upper part of the drying tank 2.

Further, by rotating in the counterclockwise direction of B in FIG. 2, the water-containing substance or the like can be lowered from the upper part to the lower part. Therefore, when a bulky water-containing substance such as cabbage or Chinese cabbage peeled off when displayed on a display shelf is thrown in from the charging port 2 ', the leaf comes into contact with the stirring blade 6 while falling in the space 7. At times, the leaf can be forcibly lowered at the inner peripheral edge of the spiral or the lower surface of the blade 6. Further, when the cabbage leaves are caught on the connecting rod 5 while falling in the space 7, the connecting rod 5 is inclined downward toward the stirring blade 6 and the centrifugal force acts. The leaves of the cabbage gradually move to the outside and approach the stirring blade 6. Then, when this leaf comes into contact with the stirring blade 6, it is forcibly drawn downward by the lower surface of the blade 6 as described above.

Therefore, when the stirring blade 6 is rotated in the reverse direction,
Even a bulky water-containing substance can be forcibly lowered to the bottom of the drying tank 2. Then, in this way, the water-containing substance descending step is forcibly lowered by the reverse rotation of the stirring blade 6.

The period in which the stirring blades 6 are rotated in the reverse direction includes at least the period during which the lid member 3 can be opened and a water-containing material (material to be dried) can be added, and after the lid member 3 is closed, a predetermined state is achieved. Until, for example, the pressure in the drying tank 2 becomes equal to or lower than a preset atmospheric pressure, or the temperature in the drying tank 2 rises to a temperature equal to or higher than a preset temperature, or until the time set in the timer elapses. You can set it as a space,
This period is called the initial stage when the operation of the drying processing apparatus 1 is started. During this initial period, the rotation control device is electrically controlled by the electric control device to rotate the stirring blade 6 in the reverse direction.

Further, a detector for detecting the opening / closing of the lid member 3 is provided, and the electric control device judges the opening / closing of the lid member 3 by a signal from the detector, and if it is judged that the lid member 3 is in the open state, the stirring is performed. The blade 6 may be rotated in the reverse direction, and when it is determined that the lid member 3 is closed, the stirring blade 6 may be controlled to be rotated normally. In this case, it is desirable to insert an idle time during conversion from reverse rotation to normal rotation. Note that the rotation of the stirring blade 6 may be manually changed, and in this case, it is necessary to forcibly convert the rotation to the normal rotation when the heating and drying step is performed. .

Further, at the lower part of the rotary shaft 4 located in the drying tank 2, there is provided a stirring plate 9 which is curved or inclined in a direction retracting from the forward rotation direction as it goes from the base end to the tip. . Further, on the inner wall of the upper portion of the drying tank 2, the stirring blade 6
A plate-shaped baffle 10 is provided to project toward the center of the drying tank 2 so as to be close to the uppermost surface. This baffle 10
Function as a scraping member.

The above-mentioned stirring blade 6 is rotated counterclockwise (in the direction of arrow A in FIG. 2) by the motor 8 connected to the rotary shaft 4 in the forward rotation when viewed from the upper part of the drying tank 2. Therefore, the water-containing substances such as raw garbage stored in the drying tank 2 are
The water-containing substance, which is carried on the lifting surface of the stirring blade 6 and conveyed toward the upper part of the drying tank 2 and reaches the uppermost portion of the stirring blade 6, is scraped off into the space 7 by the baffle 10. At this time, the water-containing substance on the stirring blade 6 rises in the drying tank 2 while being pressed against the inner wall of the drying tank 2 by the centrifugal force and being heated. Since the inside of the drying tank 2 is decompressed by a vacuum device which will be described later, the water-containing substance is heated under decompression to accelerate evaporation of water, and thereby efficient drying is performed. Further, the water-containing substance that has dropped inside the space 7 toward the bottom of the drying tank 2 is caught by the stirring plate 9, and is pushed toward the inner wall of the drying tank 2 by the centrifugal force and the inclination of the contact surface, and is stirred. The blade 6 is placed on the lifting surface. In this way, the water-containing substance in the drying tank 2 is circulated and stirred in the drying tank 2.

An outlet 11 is provided on the bottom surface of the drying tank 2 to take out the water-containing material after the drying treatment, and an openable lid 12 is attached to the outlet 11.
When the drying treatment (heating drying step) of the water-containing substance in the drying tank 2 is completed, the opening / closing lid 12 can be opened to take out the water-containing substance after the drying treatment in the drying tank 2 (removing step). The outlet 11 is not necessarily provided on the bottom surface of the drying tank 2, and may be an appropriate position such as the lower side surface of the drying tank 2 as long as the dried water-containing substance can be taken out. For example, you may open in the lower peripheral surface of the drying tank 2.

On the outer periphery of the drying tank 2, a heating jacket 13 is provided integrally with the drying tank 2 so as to surround the drying tank 2. The heating jacket 13 is a device for circulating the heating oil inside to uniformly heat the wall surface of the drying tank 2, and a heating oil circulation path 16 connecting the heating oil inlet 14 and the heating oil outlet 15 to each other. A heating oil tank 17 for storing the heating oil and a heating oil circulation pump 18 for circulating the heating oil in the heating oil circulation passage 16 are provided in the middle of the process.

An electric heater 19 is provided in the heating oil tank 17, and the heating oil in the heating oil tank 17 is heated by the electric heater 19.
Further, in the heating oil tank 17, a temperature measuring device 2 for measuring the heating oil temperature in the heating oil tank 17 is provided.
0 is provided, and the electric control device adjusts the temperature of the heating oil by turning on / off the electric heater 19 during the heating and drying process based on the detection output from the temperature measuring device 20. The temperature measuring device 20 is not necessarily provided in the heating oil tank 17, and may be provided at any position in the heating oil circulation passage 16 as long as the temperature of the heating oil can be measured. Further, without providing the temperature measuring device 20, the electric heater 1
Using the thermostat built into 9, electric heater 1
On / off of 9 may be controlled.

In the heating oil tank 17, the electric heater 1
The heating oil heated by 9 is heated by the heating oil circulation pump 18 from the heating oil inlet 14 to the heating jacket 1.
3 is heated and the wall surface of the drying tank 2 is heated. And
The heating oil after heating the drying tank 2 is heated by the heating oil outlet 15
Is discharged to the heating oil circulation path 16 and returns to the inside of the heating oil tank 17.

As described above, in this embodiment, the heating jacket 13, the heating oil tank 17, the electric heater 19, the heating oil circulation pump 18, etc. function as a heating device, and the wall of the drying tank 2 is operated by the action of the circulating heating oil. It is possible to efficiently heat and dry the water-containing substance conveyed along the inner wall of the drying tank 2 by the stirring blade 6 under reduced pressure.

An evaporative gas outlet 21 is provided on the upper side surface of the drying tank 2, and the evaporative gas outlet 21 is
A condenser 23, which functions as a cooler, is connected via an evaporative gas discharge pipe 22. The condenser 23 is a device for cooling and liquefying evaporative gas by passing cooling water through a spiral heat exchange section 24 provided inside.

The evaporative gas generated in the drying tank 2 is introduced into the condenser 23 through the evaporative gas outlet 21 and cooled to recover the liquid component. Then, the liquid component cooled and liquefied by the condenser 23 is guided to an ejector 26, which is a component of the vacuum generation device, via a recovered liquid discharge passage 25 that is connected to the lower portion of the condenser 23.

The ejector 26 is a recovery liquid circulation tank 2
The recovery liquid circulation pump 31 is provided in the middle of a recovery liquid circulation path 30 that connects the outlet 28 side and the inlet 29 side of 7.
By the negative pressure generated when the recovered liquid pressure-fed by the nozzle passes through the nozzle portion 32, the condenser 23 communicating with the condenser 23
And the inside of the drying tank 2 communicating with the condenser 23 are decompressed. Therefore, the suction port 33 opened in the middle of the nozzle portion 32 of the ejector 26 having a reduced flow passage cross-sectional area is connected to the tip of the recovery liquid discharge passage 25 that is connected to the lower portion of the condenser 23, and the condenser 23 and the condenser are connected. The inside of the drying tank 2 connected to 23 is decompressed.

Further, the recovered liquid contains a malodorous component, and if the recovered liquid is discharged as it is to the outside of the apparatus,
The malodorous component evaporates again and causes environmental pollution. For this reason, a removable odor filter 34 is provided in the recovery liquid circulation tank 27 to remove the malodorous components in the recovery liquid. Further, the recovered liquid circulation tank 27 is provided with a recovered liquid discharge port 35 on the downstream side of the deodorizing filter 34 for discharging the recovered liquid after deodorization to the outside. Then, a part of the recovered liquid after removing the malodorous component is recovered liquid outlet 3
5, the collected liquid is circulated in the collected liquid circulation path 30 by the collected liquid circulation pump 31. The deodorizing filter 34 described above is composed of, for example, an activated carbon element containing activated carbon, and can absorb and remove a malodorous component by the action of the activated carbon.

The second embodiment of the water-containing substance drying treatment apparatus 1 shown in FIGS. 3 and 4 is a substantially ring-shaped introduction guide to a water-containing substance inlet 2'opened on the upper surface of a bottomed cylindrical drying tank 2. Board 37
By providing the above, it is possible to easily add the water-containing material and to surely add the water-containing material. That is, the drying tank 2
A substantially funnel-shaped introduction guide plate 37 having a guide surface that gradually decreases in diameter downward and is inclined downward toward the inner center of the drying tank 2 is provided along the inner peripheral edge of the upper opening of the introduction guide plate. The lower surface opening of 37 is exposed to the upper end space 7 of the stirring blade 6, and the baffle 10 is arranged in the empty space below the charging guide plate 37.

If such a water-containing material guide plate 37 is provided, the water-containing material that has been introduced is guided by the inclined guide surface of the introduction guide plate 37 and easily flows down into the space 7 of the stirring blade 6. Further, if the stirring blade 6 is placed on or caught on the stirring blade 6 while the space portion 7 is falling, as described above, the stirring blade 6 is forcibly lowered by the reverse rotation. Therefore, even if the water-containing material input port 2'is small, the water-containing material is unlikely to spill around, and there is almost no flat portion on the upper edge of the drying tank 2, so that the water-containing material that has been fed in is at the upper end of the drying tank 2. Can be prevented from accumulating. Therefore, unlike the conventional drying device, it is not necessary to manually drop the water-containing material accumulated on the upper end of the drying tank into the drying tank, and it is not necessary to touch the damp material to be dried. Further, in this embodiment, since the upper end of the drying tank 2 and the charging guide plate 37 are closed, even if the lid member 3 is opened near the completion of drying, the powdery material of the material to be dried rises. Can be prevented.

Further, in this embodiment, a vacuum release valve 38 is provided on the upper part of the drying tank 2, and when the time set in the drying timer has elapsed, the electric control device operates the vacuum release valve based on the time-up signal from the drying timer. 38 is opened to return the inside of the drying tank 2 to the atmospheric pressure. Therefore, the drying timer can be set to an appropriate drying time according to the characteristics (moisture content, etc.) of the material to be dried, and reliable drying can be performed. Moreover, when the drying is completed, the inside of the drying tank 2 is automatically enlarged. Can be returned to atmospheric pressure. Therefore, it is possible to easily open the open / close lid and take out the dried material to be dried without manually operating the valve. The vacuum release valve 3
In the drying process, 8 is closed by a signal from an electric control device to make the drying tank 2 an airtight chamber.

In each of the above-described embodiments, the lid member 3 is fixed to the drying tank 2 by the hinge provided at the end of the lid member 3,
By opening and closing the lid member 3 in the vertical direction, the drying tank 2
However, the present invention is not limited to this, and a support shaft for supporting the lid member 3 at a position deviated from the center of the lid member 3 is provided. The support shaft may be fixed in a vertically movable and rotatable manner, and the lid member 3 may be moved horizontally about the support shaft so that the water-containing material inlet 2'can be largely opened. .

The stirring blade 6 is not limited to the above embodiment in which the rotary shaft 4 is penetrated into the space portion 7,
The lower end of the blade 6 is fixed to the upper end of the short rotary shaft 4 via an arm, whereby the rotary shaft 4 and the connecting rod 5 are eliminated from the inside of the space portion 7, and a bulky material to be dried falls without being caught on the way. It may be configured as follows. Further, the water-containing material that can be processed by the water-containing material drying treatment apparatus 1 according to the present invention is not only raw garbage such as vegetable scraps but also "okara" which is a tofu residue, fish heads and internal organs, shrimp and crab shells, etc. May be food waste. These dried hydrates have a wide range of uses,
For example, "okara" can be used as a raw material for processed foods or feed for livestock, and fish heads and internal organs can be used as fertilizers. Also, shrimp and crab shells contain "chitin / chitosan". Therefore, it can be widely used as medical materials such as artificial skin and sutures, food additives and the like. Also, when vegetable waste etc. are dried, the volume is significantly reduced, so
It is easy to transport after processing.

[0042]

Since the present invention has the above-mentioned constitution,
The following effects can be obtained. In the invention described in claims 1 and 4, the stirring blade rotates in the reverse direction at the initial stage of the operation to forcibly lower the water-containing substance. Therefore, even a bulky water-containing material that does not drop to the bottom of the drying tank by simply charging it from the charging port 2'can be sufficiently loaded according to the capacity of the drying tank. Therefore, the material to be dried suitable for the processing capacity of the drying processing apparatus can be loaded to efficiently perform the drying processing.

According to the second aspect of the present invention, a vacuum generator is connected to the drying tank so that the inside of the drying tank is decompressed to reduce the boiling point, that is, an environment in which water easily evaporates. Therefore, compared to the conventional case where the hydrous material is dried under atmospheric pressure, efficient drying is possible even if the temperature inside the drying tank is kept low, and the hydrous material is safely dried. In addition, the durability of the device is improved.
Further, by performing the low temperature drying, the oxidation of the water-containing substance in the drying tank is suppressed, and the generation of the malodorous component due to the oxidation can be suppressed to the minimum. Furthermore, when the dried hydrate is used as feed or as a material for food, oxidation of the hydrate is suppressed, so that the quality of the product after the drying treatment is improved.

According to the third aspect of the present invention, a device using an ejector is used as a vacuum generating device, and the negative pressure generated when the recovered liquid pumped by the recovered liquid circulation pump passes through the nozzle portion of the ejector, The pressure inside the drying tank is reduced. Therefore, even if the garbage that has started to decompose is dried, the circulation path for the vaporized gas containing the malodorous component and the liquid component is a closed circulation path, so the vaporized gas does not leak outside the vacuum generator. The malodorous component contained in the vaporized gas is not diffused outside the device.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a hydrous material drying treatment apparatus according to the present invention.

FIG. 2 is a perspective view of a stirring blade.

FIG. 3 is a plan view of a drying tank provided with a charging guide plate.

FIG. 4 is a sectional view of a drying tank provided with a feeding guide plate.

[Explanation of symbols]

 1 Water-containing material drying treatment apparatus 2 Drying tank 2'input port 3 Lid member 4 Rotating shaft 5 Connecting rod 6 Space part 7 Space part 8 Motor 9 Stirrer plate 10 Baffle 11 Outlet 12 Open / close lid 13 Heating jacket 14 Heating oil inlet 15 Heating Oil outlet 16 Heating oil circulation path 17 Heating oil tank 18 Heating oil circulation pump 19 Electric heater 20 Temperature measuring device 21 Evaporation gas outlet 22 Evaporation gas discharge pipe 23 Condenser 24 Heat exchange part 25 Recovery liquid discharge path 26 Ejector 27 Recovery liquid circulation tank 28 Recovery Liquid Circulation Tank Outlet 29 Recovery Liquid Circulation Tank Inlet 30 Recovery Liquid Circulation Route 31 Recovery Liquid Circulation Pump 32 Nozzle Part 33 Suction Port 34 Deodorizing Filter 35 Recovery Liquid Discharge Port 37 Input Guide Plate 38 Vacuum Release Valve

Claims (4)

[Claims] 1. A drying tank for accommodating a water-containing substance therein, a drying tank provided in the drying tank, rotatable along an inner wall of the drying tank, and having a space portion along a vertical direction of a rotation center. A spiral stirring blade having, a rotation driving device for rotating the stirring blade, a heating device for heating the inside of the drying tank, and a communication device connected in communication with the drying tank for cooling evaporative gas generated in the drying tank. A cooling device for recovering the liquid component, and an electric control device for controlling the rotary drive device so that the stirring blade is rotated in the reverse direction at the beginning of the operation and then the stirring blade is rotated in the normal direction. An apparatus for treating and drying a water-containing material. 2. The water-containing material drying treatment apparatus according to claim 1, wherein a vacuum generator for reducing the pressure inside the drying apparatus is provided in communication with the drying tank. 3. The vacuum generator comprises a recovered liquid circulation passage that is connected to a recovered liquid discharge passage of the cooler, a recovered liquid circulation tank provided in the recovered liquid circulation passage, and the recovered liquid circulation. 3. An ejector provided in the middle of the passage, and a recovery liquid circulation pump provided in the middle of the recovery liquid circulation path for circulating the recovery liquid in the recovery liquid circulation path. The water-containing material drying treatment apparatus described. 4. A spiral stirring blade provided inside the drying tank, rotatable along the inner wall of the drying tank, and having a space along the vertical direction of the center of rotation, is reversely rotated, The water-containing material descending step of lowering the water-containing material charged from the charging port, and decompressing the inside of the drying tank while heating the stirring blade in the forward direction while the lid member of the charging port is closed to dry the water-containing material. A method for drying a water-containing material, comprising: a heating and drying step; and a step of returning the inside of the drying tank to atmospheric pressure and then taking out the material to be dried to the outside of the drying tank.