JP2001009423A - Dehydration treatment under reduced pressure and cooker used for the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To remove and discharge water in a material to be treated from the material, in a surely purified state containing substantially no heavy metals or other impurities, originally contained, by completely immersing agitation disks in a hot oil so as to form such a hot oil surface that no projection is exposed to the outside of the surface, and allowing water evaporated or diffused from the material to be treated that is charged into the hot oil, to pass through the hot oil to vaporize the water. SOLUTION: This cooker 1 comprises a cooker main body provided with: lower and upper outer walls 12 and 13, each of which is separable from the other; and two connecting flanges 14 and 14' placed in the upper and lower outer walls 13 and 12 respectively; wherein these connecting flange 14 and 14' are abutted on each other, to place the upper outer wall 13 on the lower outer wall 12, to connect the upper and lower outer walls 13 and 12 with each other and to form the main body and accordingly, the cooker 1. This treatment process comprises: supplying a hot dehydration-treating oil from a dehydration-treating oil tank into the cooker 1; in the cooker 1, completely immersing agitation disks 15 in the hot dehydration-treating oil to transfer the total heat energy from the agitation disks 15 to the hot oil; and in such a state that the temperature within the cooker 1 is maintained at 100-110 deg.C, agitaing the hot oil, to almost completely evaporate or diffuse water in the material from it and to vaporize the water.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vacuum dehydration method and a vacuum dehydration method in which a processed material is put into a heating oil in a cooker of a vacuum dewatering apparatus, and the processed material is dehydrated while depressurizing the inside of the cooker. Is about cookers.

[0002]

2. Description of the Related Art Conventionally, garbage generated at the stage of food processing, brewer's lees generated during the production of alcohol products, manure of livestock animals, debris generated during the dismantling of the same livestock products, and dismantling of marine products. Dismantled debris and municipal sludge, including sewage sludge, are difficult to dispose of due to their high water content, and because they are organic, they spoil or grow bacteria during the disposal process. Intense foul odors, making disposal more difficult.

The inventor of the present invention can easily dehydrate various kinds of organic wastes having a high water content, and can utilize the excellent quality of the organic wastes by utilizing the excellent organic substances. Numerous vacuum dehydration treatment methods and devices that can be used as fertilizer raw materials or feed raw materials have been developed and provided.

[0004] In the dehydration method, a dehydration oil composed of waste cooking oil, animal oil, vegetable oil, or the like is put into a cooker, heated to form a heating oil, and the heated oil is subjected to a dehydration treatment. The dehydration process is performed by reducing the pressure in the cooker.

[0005] By performing this dehydration under reduced pressure, the water content of the treated product can be reduced to the order of several percent.
In addition, sterilization treatment can be performed by the heat of heating oil,
Furthermore, deodorization can be performed by having a deodorizing effect.

[0006] A plurality of stirring disks for stirring the heating oil and the processed material are provided in the cooker for performing the dehydration under reduced pressure. The stirring disk not only performs stirring, but also forms a steam flow path inside the stirring disk and sends steam to heat the stirring disk itself, thereby serving as a heat source of heating oil.

Further, a jacket portion is formed on the outer periphery of the cooker, and steam is also passed through the jacket portion to serve as a heat source of the heating oil. Normally, heat from the jacket portion is the main source of heat supply to the heating oil, and the cooker is configured to maintain a uniform temperature.

[0008] Recently, the effectiveness and high efficiency of this dewatering treatment method has been recognized, so that it has been used for dehydration treatment of a large amount of processed materials. I'm growing.

[0009]

However, the cooker must be surrounded by a jacket to heat the oil inside the cooker, and furthermore, steam is supplied to the jacket to form a pressure vessel. Therefore, the larger the capacity of the cooker, the more difficult it was to manufacture.

[0010] Even if the cooker can be manufactured, the work of transporting and installing the manufactured cooker becomes more and more difficult with the increase in size, and it is impossible to increase the size to a certain size or more. Therefore, it has not been possible to sufficiently meet the needs of customers who want large cookers.

[0011] The present invention was made in research and development to facilitate the manufacture of large cookers and to improve the workability of transport and installation. The present inventors have found a method capable of reducing the impurity concentration of water removed during operation and the BOD / COD numerical value.

[0012]

In order to solve the above-mentioned problems, in the present invention, a dehydrating oil is put into a cooker having a stirring disk disposed therein, and steam is supplied to the stirring disk. In a reduced pressure dehydration treatment method in which a dehydration treatment oil is heated indirectly by heating the dehydration treatment oil, the treatment product is fed to a cooker, and the treatment product is dehydrated while depressurizing, the stirring disk is immersed in the heating oil to project the protrusion A reduced pressure dehydration treatment method characterized by forming a heated oil surface without oil, and feeding the processed material from below the heated oil surface, passing moisture evaporating from the processed material into the heating oil and vaporizing it. It will not be provided.

In the present invention, the lower outer wall and the upper outer wall having no heating means are separable from each other, and are rotatably disposed in the processing space formed by the lower outer wall and the upper outer wall. Send steam into the stirring disk,
It is another object of the present invention to provide a cooker for use in a decompression dehydration treatment, wherein the dehydration treatment oil fed into the treatment space is heated only by a stirring disk.

In particular, the fact that the stirring disk is immersed in the heating oil, that a vapor reservoir space is formed in the upper outer wall, that a plurality of vapor suction openings are formed in the vapor reservoir space, that the interior of the hollow stirring disk A drain guide wall is disposed on the stirrer disk, and the drain generated in the stirring disk is moved along the drain guide wall with the rotation of the stirring disk and discharged from a drain discharge pipe. Things.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION In a reduced pressure dehydration method according to the present invention, a dehydration oil is placed in a cooker in which a stirring disk is provided, and steam is supplied to the stirring disk to indirectly dehydrate the oil. The present invention relates to a reduced-pressure dehydration treatment method for heating a heated oil to feed a processed product to a cooker and dehydrating the processed product while reducing the pressure.

Here, the oil for dehydration treatment refers to various oils such as waste cooking oil, animal oil, fish oil, and vegetable oil, and one or more of these oils are appropriately mixed and used.

The cooker is supplied with oil enough to immerse the stirring disk in the same oil for dehydration treatment so that there is no protrusion on the oil surface for dehydration treatment. Oil.

The treated material is fed from below the heated oil surface, and the moisture evaporated from the treated material is passed through the heated oil and vaporized, whereby heavy metals and impurities contained in the evaporated water are removed from the heated oil. To evaporate and purify the water that evaporates.

In particular, since the stirring disk is completely immersed in the heating oil, and the oil has a lower specific gravity than the water to form a heating oil surface, the evaporated water must pass through the heating oil. As a result, heavy metals and impurities contained in the water floating on the oil surface and evaporating can be reliably eluted into the heating oil. In the conventional dehydration method under reduced pressure, the stirring disk is exposed above the oil surface, so that when the stirring disk is rotated and stirred, the processed material may adhere to the stirring disk and be exposed on the oil surface. Occasionally, the steam containing impurities was evacuated as it was, resulting in high concentrations of impurities in the condensed water condensed in the processing step after evacuation, but the stirring disk was completely immersed in the heating oil By doing so, this can be prevented.

The cooker of the present invention does not have a conventional heating means by a jacket, and is configured to be separable by a lower outer wall and an upper outer wall having no heating means.

By forming the cooker by the lower outer wall and the upper outer wall, the cookers can be manufactured separately, and the cooker can be easily manufactured by not forming the jacket, so that a low-cost cooker can be manufactured. Can be provided. Even a large-capacity cooker can be easily manufactured.

Further, when the cooker is transported, the lower outer wall, the upper outer wall, and the stirring disk disposed inside can be transported separately, so that the transport operation can be facilitated. Can be easily installed.

The stirring disk disposed inside the processing space formed by the lower outer wall and the upper outer wall is rotatably disposed with respect to the cooker. Further, the agitating disk is formed in a hollow state, and steam is supplied to the inside to indirectly heat the dehydrating oil in the processing space. By using only the stirring disk as the heating means, the temperature inside the cooker can be easily adjusted.

Further, since the stirring disk is immersed in the heating oil, all the heat energy generated by the stirring disk can be transmitted to the heating oil. Therefore, the loss of the heat energy is small and the heating oil can be efficiently removed. Can be heated.

Further, since a vapor reservoir space is formed on the upper outer wall, water is continuously vaporized on the heating oil surface under the vapor reservoir space, and is exhausted without any hindrance. Water can be efficiently evaporated. In the conventional cooker, as described above, the stirring disk was partly exposed on the heating oil surface and rotated and stirred, so that the flow of the evaporated vapor was obstructed by the stirring disk and the steam exhaust efficiency was reduced. According to the present invention, the agitated disk is completely immersed in the heating oil and the vapor reservoir space is formed, so that the vaporized vapor can be smoothly exhausted.

Further, by forming a plurality of vapor suction openings in the vapor reservoir space, the vapor in the vapor reservoir space is quickly exhausted, the increase in the vapor concentration in the vapor reservoir space is suppressed, and the vapor is more easily vaporized. Make up.

A drain guide wall is provided inside the stirring disk, and the drain generated in the stirring disk is moved along the drain guide wall with the rotation of the stirring disk. It is configured to discharge more.

One embodiment of the present invention will be described below with reference to the drawings.

[0029]

FIG. 1 is an explanatory view showing the entire structure of a dehydration treatment apparatus for performing a dehydration treatment under reduced pressure according to the present invention. Reference numeral 1 denotes a cooker, reference numeral 2 denotes a boiler that generates steam serving as a heat source of the cooker 1, and reference numerals 2a and 2b denote steam air pipes that communicate the cooker 1 and the boiler 2, respectively.

Reference numeral 3 denotes an oil tank for dehydrating treatment. Oil such as waste edible oil, animal oil, fish oil, vegetable oil, etc. is put in the oil tank for dehydrating treatment 3 and, if necessary, a heating heater 3a.
The oil is supplied to the cooker 1 by the oil feed pump P3. Reference numeral 3b is an oil feed pipe. As will be described later, in the present invention, the dehydrating oil in the cooker 1 is heated by the stirring disk 15 in the cooker 1, and thus the dehydrating oil supplied to the cooker 1 is heated in advance. The structure is such that the operation of raising the temperature of the oil for dehydration treatment by the step 15 is omitted and the operation efficiency is improved. In addition, when the temperature of the processed material to be fed into the cooker 1 is low and the temperature in the cooker 1 is too low, the heated dehydration oil in the dehydration oil tank 3 is poured into the cooker 1 so as to promptly increase the temperature. The temperature inside the cooker 1 may be increased.

Reference numeral 4 denotes a mist catcher, which is connected to the cooker 1 via a suction pipe 4a, separates oil and solids scattered together with the steam from the steam sucked from the cooker 1, and connects the return pipe 4b to the return pipe 4b. It is configured to return the oil and the solid separated through the cooker 1 to the cooker 1.

Further, the mist catcher 4 is connected to a condenser 5 via a vapor suction pipe 5a, and a vacuum pump VP is connected to the condenser 5 so that the vapor in the cooker 1 is sucked by the vacuum pump VP. are doing.

In the condenser 5, the vapor sucked from the cooker 1 is condensed and drained. Reference numeral 6 denotes a cooling tower for cooling the condensed water by the condenser 5. Reference numerals 6a and 6b are cooling water pipes connecting the cooling tower 6 and the condenser 5, and are configured to circulate the cooling water by a cooling water supply pump P4.

Reference numeral 5b denotes a condensed water pipe for sending condensed water from the condenser 5 to the hot well tank 7.
The drain of the vacuum pump VP is also supplied to the hot well tank 7 through a vacuum pump drain pipe 7a.

The condensed water stored in the hot well tank 7 is sent to the water treatment facility 8 by a hot well pump P5. Reference numeral 7b denotes a hot well pipe.

The processed material in the cooker 1 is stored in the processed material receiving tank 9 and is supplied to the first processed material feeding pump P1.
To the pretreatment tank 10. Reference numeral 9a denotes a first processed product supply pipe.

In the pretreatment tank 10, the viscosity is adjusted so that the supply to the cooker 1 is facilitated by mixing an appropriate amount of oil with the treatment product, and then the second treatment product feed pump P
2 to feed to the cooker. Sign 1
Reference numeral 0a denotes a second processed matter supply pipe.

If the water content of the processed material to be dehydrated is large and it is not necessary to adjust the viscosity in the pre-treatment tank 10, there is no need to provide the pre-treatment tank 10 and the second processed product feed pump P2. In addition, the viscosity may be adjusted by adding oil or the like in the processed product receiving tank 9 in advance, and in such a case, it is not necessary to provide the pre-processed tank 10 and the second processed product feed pump P2. However, by providing the pretreatment tank 10, even if the oil or the processed product in the cooker 1 flows backward through the second processed product delivery pipe due to an accidental accident, the backflow product is received by the preprocess tank 10. Therefore, it is possible to prevent the accident damage from spreading.

Reference numeral 11 denotes a cooker receiving tank.
The processed product and the heating oil after the dehydration process are poured into the cooker receiving tank 11. Reference numeral 11a denotes a discharge pipe connecting the cooker 1 and the cooker receiving tank 11. Although not shown, the cooker receiving tank 11
The dewatered processed material discharged to the hopper is then sent to a deoiling device such as a centrifugal separator for deoiling.

Next, the structure of the cooker 1 will be described with reference to FIGS.

As shown in FIG. 3B, the main body of the cooker 1 of the present invention can be separated into a lower outer wall 12 and an upper outer wall 13. Connecting flanges 14 and 14 'are provided on the lower outer wall 12 and the upper outer wall 13, respectively. The connecting flanges 14 and 14' are brought into contact with each other, and the upper outer wall 13 is provided on the lower outer wall 12 and connected. By doing so, the cooker 1 is formed.

The cooker 1 of the present invention is not provided with a jacket portion, and a heat insulating material is provided on the wall surfaces of the lower outer wall 12 and the upper outer wall 13 so as to prevent the heat inside the cooker 1 from leaking to the outside. are doing.

Since the cooker 1 can be vertically separated, the lower outer wall 12, the upper outer wall 13, and the stirring disk 15 can be manufactured separately when the cooker 1 is manufactured. And work efficiency can be improved. In particular, since no jacket is provided on the lower outer wall 12 and the upper outer wall 13, the manufacturing cost can be reduced.

Further, the separately manufactured lower outer wall 12, upper outer wall 13, and stirring disk 15 can be individually transported to the place where the cooker 1 is installed.
Even a large-capacity cooker 1 can be easily transported. The transported lower outer wall 12, upper outer wall 13, and stirring disk 15 become the cooker 1 by assembling at the installation location.

Reference numeral 16 in FIGS. 2 and 3 denotes a pedestal disposed on the lower outer wall 12. Reference numeral 17 denotes a vapor reservoir space formed in the upper outer wall 13, and when the radius of the stirring disk 15 is R, the height of the vapor reservoir space 17 (FIG. 3)
(W) in (a) is formed to be about R / 4 to 3R / 4. The most desirable is about R / 2. R /
If it is smaller than 4, the amount of the heating oil scattered with the water vapor increases, and the amount of the heating oil mixed into the mist catcher 4 increases, making it difficult to completely separate the heating oil in the mist catcher 4. There is. Conversely, if the ratio is 3R / 4 or more, there is little possibility that the amount of the heating oil mixed into the mist catcher 4, but the suction operation for the decompression process takes a long time, and the operation efficiency is reduced. The symbol S in FIG. 3A indicates the oil level of the heating oil.

Reference numeral 18 denotes a connection pipe for connecting the mist catcher 4 with the steam suction opening 19 provided on the upper outer wall 13. The vapor suction opening 19 is provided in the vapor storage space 1.
A plurality are provided at appropriate intervals so as to be able to evenly suck the vapor from the entire 7. If the number of the steam suction openings 19 is small and the steam is accumulated in the steam accumulation space 17, the accumulated steam is cooled by the wall surface of the upper outer wall 13, becomes water again, and returns to the heating oil. Must be evaporated again, resulting in reduced energy efficiency.

Reference numeral 20 denotes an oil feed port connected to the oil feed pipe 3b for feeding the oil in the dehydration oil tank 3 into the cooker 1, and reference numeral 21 denotes the oil separated by the mist catcher 4 in the cooker 1. Reference numeral 22 denotes a return oil supply port connected to the return pipe 4b to return to the cooker receiving tank 11 for discharging the processed material and oil after the dehydration processing.

As shown in FIG. 2, a plurality of stirring disks 15 are connected to the same rotating shaft 23 in the cooker 1, and the rotating shaft 23 is rotated by a rotating motor M. Thereby, the heating oil in the cooker 1 and the processed material are stirred. Code 24
Is a connecting belt for connecting the rotating shaft 23 and the rotating motor M in an interlocked manner.

Although not shown in FIG. 2, as shown in FIG. 3, the stirring disk 15 is provided with a stirring blade 30 at a required position. The number and shape of the stirring disks 15 may be set appropriately according to the processed material.

As shown in FIG. 4, the rotary shaft 23 has a hollow cylindrical shape, and steam baffles 2a and 2b are connected to both ends of the rotary shaft 23, respectively, to feed steam from the boiler 2. It is configured as follows.

The stirring disk 15 is also a hollow disk, and steam is sent from the rotating shaft 23 to the stirring disk 15 through a steam flow port 25 formed in the rotating shaft 23 to heat the stirring disk 15, and the cooker 1 The oil for dehydration treatment in the stirring disk 15 and the rotating shaft 23
And heating to be performed. In order to increase the heating efficiency of the dehydrating oil in the cooker 1, a stirring disk 15
The surface may be formed with irregularities or irregularities to increase the contact area with oil.

Reference numeral 26 denotes a locking pin provided to prevent the stirring disk 15 from being deformed by the steam supplied into the stirring disk 15. Reference numeral 27
Is a drain discharge pipe for discharging the drain in the stirring disk 15 to the rotating shaft 23.

As shown in the sectional view of FIG. 5, a drain guide wall 28 is provided in the stirring disk 15 from the outer peripheral edge toward the center and has a slight curvature so that the rotating shaft 23 is With the rotation, the drain generated in the stirring disk 15 is moved along the drain guide wall 28 and discharged from the drain discharge pipe 27 into the rotary shaft 23. Reference numeral 29 denotes the drain guide wall 28
This is a curved portion of the drain guide wall 28 which is curved in accordance with the shape of the drain discharge pipe 27 so that the drain is smoothly sent from the drain pipe 27 to the drain discharge pipe 27.

Next, a dehydrating operation using the dehydrating apparatus of the present invention will be described.

First, dehydration oil heated to a certain degree, preferably about 100 ° C., is fed into the cooker 1 from the dehydration oil tank 3. Alternatively, an unheated oil for dehydration treatment may be fed and heated in the cooker 1.
Here, as the oil for the dehydration treatment, waste edible oil, animal oil, fish oil, vegetable oil, or the like is appropriately selected or used in combination. There is no particular limitation on the material and amount of the oil, and any oil may be used.

The amount of the dehydrating oil to be fed to the cooker 1 is such that the stirring disk 15 in the cooker 1 is completely immersed. By completely immersing the stirring disk 15, all the heat energy emitted from the stirring disk 15 is transmitted to the dehydrating oil in the cooker 1, thereby preventing waste of the heat energy.

The oil for dehydration treatment fed to the cooker 1 is maintained at about 100 to 110 ° C. by the stirring disk 15. Depending on the material to be dehydrated, the material may be heated to about 150 ° C. However, when the treated material after dehydration is later used as a fertilizer material or feed material, if the temperature is too high, the dehydration effect is high,
Since there is a risk that important fertilizer components and feed components may be degraded and decomposed, they are usually used while being maintained at about 100 to 110 ° C. The processed material is, as described above,
Garbage generated at the stage of food processing, brewery lees generated during the production of alcoholic products, debris resulting from the demolition of livestock manure and livestock products, demolition debris resulting from the demolition of marine products, It is sewage sludge, city sludge, etc., and after dehydration, becomes a good fertilizer raw material or feed raw material.

After the temperature in the cooker 1 is maintained at about 100 to 110 ° C., as shown in FIG. 1, the processed material is fed from below the cooker 1 by the second processed material feed pump P2. By feeding from below the cooker 1, the moisture in the treated material starts to evaporate immediately, while the steam generated by the evaporation progresses through the heating oil, and various metals such as heavy metals mixed into the steam. Impurities elute in the heating oil,
In the vapor storage space 17, only the vapor with a small amount of impurities evaporates and accumulates.

Accordingly, the vapor accumulated in the vapor accumulation space 17 is sucked by the vacuum pump VP and condensed,
When drained, no impurities are mixed in the drain, and the values of BOD and COD can be reduced.
Water treatment in the water treatment equipment 8 can be easily performed.

The material to be fed to the cooker 1 is not necessarily limited to the feed from below the cooker 1, but is fed from a position below the oil level S (see FIG. 3A) of the heating oil. What is necessary is just to comprise.

The steam accumulated in the vapor accumulation space 17 is sucked as needed by a vacuum pump VP, and
The inside is not pressurized. If anything, the pressure is slightly reduced from the normal pressure, and the processed material is gently fed from the pre-treatment tank 10 using the reduced pressure and the action of the siphon to be fed into the cooker 1. You may comprise. Since the processed material is gently drawn into the cooker 1 by feeding the processed material by using the reduced pressure, it prevents bumping of the processed material when it is drawn into the cooker 1, and generates an impact due to the bumping and a mist. The foreign substances are prevented from being sucked into the catcher 4 and the condenser 5.

Also, by gently feeding the processed material, it is possible to prevent the temperature inside the cooker 1 from drastically lowering, and to prevent an additional operation for raising the temperature inside the cooker 1 from occurring. are doing.

As described above, it is desirable to adjust the viscosity of the processed material in the preliminary processing tank 10 so that the processed material can be gently fed. In particular, if air is mixed in the processed material, it will hinder the feeding, so it is desirable to perform simple defoaming if possible. However, the feeding of the processed material to the cooker 1 is not limited to the feeding by gentle suction of the processed material by utilizing the reduced pressure, but may be pressure-fed by the second processed material feeding pump P2 in some cases.

After feeding a predetermined amount of the processed material into the cooker 1, the inside of the cooker 1 is reduced by 10 to 50 mmHg from the normal pressure by the vacuum pump VP. At this time, cooker 1
The temperature in the inside is about 85 to 90 ° C. with the supply of the processed material, and the processed material and the heating oil are sufficiently stirred and mixed by the stirring disk 15 and heated.

By stirring for about 30 minutes in this state, the water that causes the processed material to have fluidity can be substantially evaporated. At this time, the fertilizer component and the feed component in the processed product can be thermally coagulated, and the fertilizer component and the feed component can be prevented from being eluted into the heating oil during the subsequent processing.

Next, the inside of the cooker 1 is set to 250 to
Reduce the pressure by about 350 mmHg. At this time, the temperature in the cooker 1 is about 100 ° C., and this state is maintained for about 10 minutes to prevent the temperature inside the cooker 1 from being lowered in the next decompression work.

Next, the inside of the cooker 1 is set at 600 to 600
Reduce the pressure by about 700 mmHg. At this time, stirring is performed while heating with the stirring disk 15 so that the temperature inside the cooker 1 becomes about 110 to 120 ° C. Change this state to 10
By maintaining stirring for about a minute, the water and oil in the tissue constituting the processed material are replaced, and dehydration is performed to the core of the processed material.

The processed product having been subjected to the dehydration under reduced pressure is discharged to the cooker receiving tank 11, and then deoiled by a compressing machine, a centrifugal separator, normal hexane or the like until it becomes about 1 to 20%. The deoiled treated product is in a dried state, and then finely crushed to be used as a fertilizer raw material or feed raw material.

[0069]

According to the present invention, the following effects can be obtained.

The stirring disk is immersed in the heating oil to form a heating oil surface without protrusions, and the processed material is fed from below the heating oil surface to convert the water evaporated from the processed material into the heating oil. By passing through and evaporating, heavy metals and impurities contained in the evaporated water are eluted into the heating oil,
Evaporated water can be purified. In particular, since the stirring disk is completely immersed in the heating oil, the evaporated water always passes through the heated oil and floats on the oil surface, so that heavy metals and impurities contained in the evaporated water can be reliably removed. Can be eluted in heated oil.

The cooker can be manufactured separately from the lower outer wall and the upper outer wall having no heating means such as a jacket, so that the cooker can be manufactured separately. Manufacturing can be facilitated, and a low-cost cooker can be provided. Even a large-capacity cooker can be easily manufactured. Furthermore, when transporting the cooker, the lower outer wall, the upper outer wall, and the stirring disk provided inside can be transported separately, so that the transport operation can be facilitated, and the cooker installation operation can be performed. Can be facilitated.

By immersing the stirring disk in the heating oil, all of the heat energy generated by the stirring disk can be transmitted to the heating oil, so that the heating oil can be efficiently heated with little loss of heat energy. it can.

By forming a vapor reservoir space on the upper outer wall, moisture is continuously vaporized on the heating oil surface under the vapor reservoir space, and is exhausted without any hindrance, thereby efficiently evaporating moisture in the processing object. Can be done.

By forming a plurality of vapor suction openings in the vapor reservoir space, the vapor in the vapor reservoir space is quickly exhausted, the increase in the vapor concentration in the vapor reservoir space is suppressed, and the vaporization is further facilitated. Can be.

A drain guide wall is provided inside the hollow stirring disk, and the drain generated in the stirring disk is moved along the drain guide wall with the rotation of the stirring disk, and is discharged from the drain discharge pipe. With such a configuration, it is possible to prevent the drain from accumulating in the stirring disk, and to always smoothly rotate and stir the stirring disk.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing an overall configuration of a dehydration processing apparatus for performing a decompression dehydration processing according to the present invention.

FIG. 2 is an explanatory view of a cooker of the reduced-pressure dewatering apparatus according to the present invention.

FIG. 3 is an explanatory side sectional view of a cooker of the vacuum dewatering apparatus according to the present invention.

FIG. 4 is a partially cutaway explanatory view of a stirring disk portion.

FIG. 5 is an explanatory longitudinal sectional view of a stirring disk.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cooker 12 Lower outer wall 13 Upper outer wall 14, 14 'Connection flange 15 Stirring disk 16 Pedestal 17 Steam accumulation space 19 Steam suction opening 20 Oil supply port 21 Return oil supply port 22 Outlet 23 Rotary shaft 30 Stirrer blade

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) C05F 5/00 B09B 5/00 ZABE (72) Inventor Shuzo Nakazono 4-7-1 Hirao, Chuo-ku, Fukuoka City, Fukuoka Prefecture No. 17 F-term (reference) 4B061 DA06 DB12 DB13 4D004 AA02 AA03 AA04 AB01 BA04 CA15 CA22 CA46 CA48 CB04 CB28 CB31 CB43 CC15 DA02 DA07 DA09 4D059 AA01 AA02 AA07 AA08 BD09 BD12 BD19 BD21 BJ01 CB30 CC01 CC02 CC02 CC02 CC42 CC45 CC51 GG18 GG43 GG67

Claims (6)

[Claims] 1. A dehydrating oil is put into a cooker in which a stirring disk is disposed, and steam is supplied to the stirring disk to heat the dehydrating oil to a heating oil. In a reduced-pressure dehydration treatment method of feeding and dehydrating a treated material while decompressing, a stir disk is immersed in heating oil to form a heated oil surface without protrusions, and the treated material is heated at the same temperature. A reduced pressure dehydration method comprising feeding water from below and evaporating water vaporized from a processed product through heating oil. 2. A stirring disk which is separable into a lower outer wall and an upper outer wall having no heating means and is rotatably disposed in a processing space formed by the lower outer wall and the upper outer wall. A cooker for use in vacuum dehydration processing, wherein steam is supplied to heat dehydration processing oil fed into the processing space with only a stirring disk. 3. A cooker for use in a vacuum dehydration treatment according to claim 2, wherein said stirring disk is immersed in heating oil. 4. A cooker for use in vacuum dehydration treatment according to claim 2, wherein a vapor reservoir space is formed in said upper outer wall. 5. A cooker for use in a vacuum dehydration process according to claim 4, wherein a plurality of steam suction openings are formed in said steam pool space. 6. A drain guide wall is provided inside the hollow stirring disk, and drain generated in the stirring disk is moved along the drain guide wall with rotation of the stirring disk, and drain is discharged. The cooker used in the vacuum dehydration treatment according to any one of claims 2 to 5, wherein the cooker is configured to be discharged from a pipe.