JP2002045819A - Hot oil treating method and hot oil treating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hot oil treating method and a hot oil treating device capable of arousing the strong convection of oil in a place including the lower part of an oil container, infiltrating hot oil from the entire periphery of an object to be treated to the object to be treated and performing hot oil treatment at the time of performing the hot oil treatment to food materials and rubbish such as garbage. SOLUTION: In this hot oil treating method for heating and oil-infiltrating the object 9 to be treated in the hot oil at a high temperature, the supply port 2a of the object 9 to be treated is provided on the lower part of a vertical and deep oil container 2, the object 9 to be treated is supplied from the supply port 2a into the hot oil O at the high temperature housed inside the oil container 2 and the hot oil treatment of the object 9 to be treated is performed while the object 9 to be treated surfaces from the supply port 2a through the hot oil 2 to an oil surface.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot oil processing method and a hot oil processing apparatus used for hot oil processing such as high temperature, oil immersion, dehydration, and sterilization of food materials and wastes.

[0002]

2. Description of the Related Art In conventional hot oil processing in processing food such as fried food and tempura, an object to be processed, which is a food material, is charged from a high-temperature oil level stored in a cooking container (tempura pan).

[0003] In food processing, before hot oil treatment, water contains water, and since it is heavier than oil, there are some that settle immediately after supply. However, these food materials are heated by oil to evaporate water and become lighter. Therefore, when it is heated with hot oil, it is pressed down from the top, or even if it is floating, it may fall down periodically or over a suitable period of time, so that the entire peripheral surface of the material The heat treatment is performed evenly to avoid hot oil treatment on only one side of the object.

[0004] In addition, as shown in FIG. 5, a food material before hot oil treatment that floats lighter than oil when it is carried in, for example, a hamburger or a cutlet, is provided with a carrying conveyor 14 and a holding conveyor for preventing floating, as shown in FIG. The food material 19 is carried into the oil container 12 heated by the heating device 13 such as a burner to perform hot oil treatment, while holding the food material 19 between the upper and lower sides to prevent the food material 19 from floating. The hot oil processing time is adjusted by the speed of the carry-in conveyor 14.

On the other hand, recently, waste such as garbage and sludge is also subjected to hot oil treatment to simultaneously perform dehydration and high temperature treatment, to reduce the weight and volume by dehydration, and to remove deodorant by high temperature treatment. We sterilize and prevent decay.

[0006]

However, in the conventional hot oil processing, an object to be processed is charged and supplied from above the hot oil stored in the oil container through the oil surface.

[0007] Therefore, only the surface portion of the oil can be used for the hot oil treatment, and a large oil surface area is required. Therefore, the contact with the air increases, and the oil is easily oxidized and deteriorated. There is a problem that is short.

Further, in order to secure the amount of heat deprived of the object and reduce the temperature change, the amount of oil is increased to secure the heat capacity of the oil. There is.

That is, the convection of the oil in the oil container is violent near the oil surface, gentle at the bottom of the container, and there is little exchange of oil between the upper and lower parts. Therefore, natural convection is generated in the oil by heating from below. Thus, the upper and lower oils are mixed and heat is transferred. However, the oil near the surface is deprived of a large amount of heat to change the water contained in the object to be treated into water vapor, and is cooled down and becomes heavy.However, the rise in the generated water vapor hinders sedimentation. Therefore, there is a problem that sufficient heat transfer cannot be performed, it is difficult to keep the oil temperature at the oil surface portion constant, and stable hot oil treatment cannot be performed.

[0010] This is a particularly important problem particularly for the purpose of dehydration treatment, since it is necessary to supply a large amount of heat corresponding to the latent heat of evaporation.

Furthermore, the object to be treated is generally light and floats from the beginning or immediately after being charged, and is subjected to hot oil treatment in this floating state, so that the upper surface facing the hot oil faces the hot oil. There is a problem that the lower side is heat-treated earlier and hot oil treatment is not evenly performed on the upper surface and the lower surface.

Further, in order to uniformly treat the hot oil, hot oil is sprayed on the upper surface of the floating object, the object is turned over, or the floating object is placed in the oil. In order to perform continuous processing, it is necessary to sequentially move objects to be processed floating on the oil surface, and this movement requires a device with power. There is a problem that the cost rises.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problem, and an object of the present invention is to include a lower portion of an oil container when hot-oil-treating waste materials such as food materials and garbage. It is an object of the present invention to provide a hot oil processing method and a hot oil processing apparatus that can evoke intense convection of oil and allow hot oil to permeate an object from all around to perform hot oil processing.

A second object of the present invention is to provide a hot oil processing method and a hot oil processing apparatus which can perform low-temperature hot oil processing and high-temperature hot oil processing in the same oil container in hot oil processing. It is in.

[0015]

The hot oil treatment method of the present invention for achieving the above object is as follows.

1) A hot oil treatment method for heating and immersing an object to be treated in high-temperature hot oil, wherein a supply port for the object to be treated is provided at a lower portion of a vertically deep oil container, and the inside of the oil container is provided. The object to be treated is supplied from the supply port into the high-temperature hot oil stored in the hot oil, and the object to be treated is subjected to hot oil treatment while the object to be treated floats in the hot oil from the supply port toward the oil surface. It is characterized by doing.

Since the hot oil processing is performed during the floating, the entire circumference of the object to be treated is uniformly contacted with the hot oil, and the rising of the water vapor generated by the floating of the object to be processed and the evaporation of the moisture of the object to be processed. The oil is agitated by the flow and mixed up and down, so that heat transfer is smoothly performed, and a large amount of the object to be processed can be continuously processed. In addition, no external power is required for floating the object.

Also, since a large oil surface area is not required,
Since the area in contact with air is small and deterioration of the oil can be suppressed, the life of the oil is extended.

2) A hot oil treatment method for heating and immersing an object to be processed in hot oil at a high temperature, wherein a supply port for the object to be processed is provided at a lower portion of a vertically deep oil container, and the oil container is provided with The oil temperature of the low-temperature oil layer below the stored hot oil is maintained at or below the steam generation temperature, and the oil temperature of the high-temperature oil layer above the hot oil is maintained at or above the steam generation temperature. In the oil,
An object to be processed is supplied from the supply port, and while the high-temperature oil layer floats after the low-temperature oil layer floats from the supply port toward the oil surface, the object to be processed floats in the hot oil while floating. The processed material is subjected to hot oil treatment.

By passing the material to be processed through the high and low temperature oil layers, it is possible to perform a higher degree of hot oil treatment, so that when food materials are handled, cooking more suitable for the food materials can be performed. .

Further, by changing the depth of the oil layer, the hot oil processing time can be changed, so that finer hot oil processing can be performed.

Further, the type of oil in the upper and lower oil layers can be changed.
Since there is little convection, this low-temperature oil layer can be further made into a plurality of layers of different oil types and different temperatures, and the range of hot oil treatment can be expanded.

The hot oil processing apparatus of the present invention for achieving the above object is as follows.

3) A vertical oil container for storing hot oil for heating the object to be heated at a high temperature, and a supply device for the object connected to a supply port provided at a lower portion of the oil container. The oil container is formed to have an oil depth that allows a predetermined hot oil treatment while the object supplied from the supply port is floating.

The predetermined hot oil treatment is a necessary heat treatment which is determined in advance depending on the properties of the object to be treated, the temperature of the hot oil, the floating speed, the processing time, the properties after the processing, and the like.

Then, if this hot oil treatment device is used,
The object to be treated can be treated with hot oil by the above hot oil treatment method.

4) In the above hot oil processing apparatus, the oil container further includes an oil heating device for heating the hot oil, and a supply device connected to a supply port at a lower portion of the oil container. And a recovery device facing the oil surface.

If this hot oil processing apparatus is used, the object to be processed can be continuously processed with the hot oil by the above hot oil processing method.

5) Further, in the above hot oil processing apparatus,
A floating speed adjusting mechanism for controlling the floating speed of the object to be processed is provided in the oil container.

This floating speed adjusting mechanism can be formed by a spiral floating guide, a floating guide having staggered inclined surfaces, a screw feeder for transferring a workpiece downward, and the like. By providing the speed adjusting mechanism, the shortage of the depth of the oil container can be covered, the volume, particularly the height, of the oil container can be reduced, and the whole apparatus can be made compact. As a result, the amount of hot oil used can be reduced and the amount of heat radiation can be reduced, and the thermal efficiency can be improved.

Further, by providing a floating speed adjusting mechanism such as a screw feeder which can move the object to be processed in the upward direction, it becomes possible to perform hot oil processing while floating even the object to be settled in hot oil. .

6) Fluid waste can be handled as the object to be treated.

As the fluid waste, there is a fried material of a kneaded material which is subjected to a hot oil treatment with a food material.
There are garbage sludge, sewage sludge slurry and other expired foods.

In particular, it is difficult to supply fluid oil to hot oil from above the oil surface, and if there is a large amount of water, a large amount of evaporation will occur explosively at the moment of injection, so that the oil scatters and the supplied waste Dispersion makes recovery difficult and facilitates these processes, which were considered difficult in the prior art.

7) Among them, it is particularly effective when the object to be treated is raw garbage sludge such as residual rice.

[0036] Waste meal treatment is a variety of components and has problems such as bad smell and decay, and the treatment has been a problem. However, it can be treated relatively easily, and those deoiled after heat treatment can be used as feed or fertilizer. Can be used effectively.

8) Further, a food material can be handled as the object to be treated.

This food material can be treated with hot oil from the entire circumference of the object to be treated at a uniform temperature, so that a delicious food can be obtained.

[0039]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A hot oil processing apparatus and a hot oil processing method according to an embodiment of the present invention will be described below with reference to the drawings.

[Object to be Treated] In the method and apparatus for treating hot oil according to the present invention, objects to be treated with hot oil include foods such as hamburgers, croquettes, cutlets, and menchi, garbage and sewage. Wastes such as sludge can be targeted, and by property, sludge-like mixtures such as solids such as hamburgers and garbage and sewage sludge such as sewage sludge can be targeted.

Also, garbage and the like are crushed in advance by a mixer,
After pretreatment such as mixing oil to make a slurry,
Hot oil treatment is also possible.

[Heat Oil Treatment Apparatus] The hot oil treatment apparatus 1 for treating these workpieces 9 comprises an oil heating apparatus 3
And a supply port 2a in a lower portion of the oil container 2.
And a recovery device 5 facing the oil level.

The oil container 2 is a container for storing high-temperature oil O for hot oil processing, is formed in a vertical shape, has an oil heating device 3 for heating oil on the outer peripheral wall, and has a supply device 4 on a lower portion. Are formed to have an oil drain hole 2c in the supply port 2a to be connected and the bottom 2b. In addition, an overflow pipe 2d, an oil supply pipe 2e, and the like are connected to the oil container 2.

If necessary, as shown in FIG. 2, the rising speed of the heat-treated material 9, ie, the inside of the oil container 2,
A levitation guide 6 for controlling the levitation time is provided.

In place of the floating guide 6, as shown in FIG. 3, a screw feeder 6B for feeding the object 9 downward is provided, and the rotation speed of the screw feeder 6B, that is, the return speed is adjusted. Hot oil processing can be performed while adjusting the floating speed of the processing object 9 supplied from the lower side of the oil container 2.

Further, the oil heating device 3 is provided with the oil O in the oil container 2.
And an amount of heat deprived by the object 9 to be processed, and is formed by providing an electric heater, a steam heater, and the like along the wall surface of the oil container 2. These heaters 3 may be provided on the outside, or may be provided on the inside of the oil container 3 as in a heating pipe 3A shown in FIG. It does not hinder the rise and the convection of oil, and also facilitates maintenance. On the other hand, since the heat transfer efficiency is improved when provided inside, it is more effective when used as a part of the floating guide 6.

The supply device 4 is for supplying the object to be treated 9 into the hot oil O, and is provided with a piston type supply device 4 as shown in FIG. 1 or a return heat as shown in FIG. The supply device 4 for charging the object 9 into the oil flow, or when the object 9 is in the form of a slurry, a continuous screw feeder 4A or a monopump is used as shown in FIG. It is also possible to perform intermittent feeding or continuous feeding by intermittent operation or continuous operation. Further, as shown in FIG. 4, the object 9 is put into a pressure tank 14C, and compressed air A is injected, thereby causing the object 9 to be throttled.
And can be supplied.

In the case of the piston type supply device 4 shown in FIG. 1, the workpiece 9 entering from the supply port 4b from the hopper 14 is pressed discontinuously into the oil by pressing the piston 4a. The processing object 9 is intermittently supplied in the state of rabbit feces. In addition, continuous feeder feeder 4B
In the case of continuous operation, it is continuously supplied in a tocorotene shape.

Further, by providing an injection nozzle 4c and a cutter 4d at the inlet of the supply device 4, any shape which can be easily post-processed, for example, a granular shape, a slice shape such as potato chips, or a strip shape such as fried potatoes is provided. You can also.

A collecting device 5 formed by a belt conveyor or the like is provided in order to scoop up and collect the processed object 9 after the hot oil treatment, which floats on the oil surface. This is only required to be able to scoop up the processing object 9 which is continuously floating, and may be collected by a collection guide 5b and scooped by a wire mesh bucket 5a which moves on a belt conveyor 5, or FIG.
As shown in (5), the oil may overflow onto the wire mesh conveyor 5A, and the oil of the object 9 after the hot oil treatment may be cut on the conveyor 5A and moved to the next processing step. it can.

[Hot Oil Processing Method] Next, a hot oil processing method using the hot oil processing apparatus 1 having the above configuration will be described.

First, the oil O is put into the oil container 2 and the oil O is heated to the processing temperature by the oil heating device 3 such as an electric heater.
Heat. At this time, the oil O previously heated to a high temperature
Oil heating device 3 installed in the hot oil treatment device 1
Capacity and burden can be reduced.

When the oil O is heated and reaches a predetermined temperature, the object 9 is supplied into the oil O by the supply device 4.

The object 9 supplied to the lower side of the oil container 2 passes through the hot oil O, and the water contained therein evaporates and becomes light, so that it floats in the oil O. During this floating, the entire circumference is surrounded by the hot oil O, so that the dehydration and the heat treatment by the hot oil O are performed. That is, when the water is evaporated by receiving heat from the surrounding high-temperature oil O, the high-temperature oil replaces the evaporated water and penetrates, and further evaporates the inner water. It can be treated and can have dehydration and sterilization effects.

The control of the floating speed related to the hot oil processing time can be relatively easily performed by providing the inclined floating guide 6 or the spiral floating guide shown in FIG. At this time, the water contained in the processing object 9 evaporates and becomes water vapor S, so that the floating force is reduced by the floating force.
The workpiece 9 floats along the floating guide 6.

As shown in FIG. 3, when a screw feeder 6B for feeding the object 9 downward is provided, the return speed is adjusted together with the supply speed by adjusting the rotation speed of the screw feeder 6B. Optimize hot oil processing time. In the oil container 2, the gas of the steam S, the liquid of the oil O, and the solid of the object 9 are mixed, and a strong convection occurs due to the floating of the steam S, so that a large stirring effect is obtained. Since the oil O is mixed and equalized in temperature, heat supply is performed well.

The object 9 floats while undergoing hot oil treatment, and finally reaches the oil surface and floats on the oil surface.
Since the processing object 9 floating on the oil surface is in a dried state after removing the contained water, it is scooped and collected by a collecting device 5 such as a belt conveyor.

In the hot oil treatment apparatus 1, the optimum dewatering time depends on the water content of the article 9 to be treated and the difficulty of the hot oil treatment. The size at the time of supply of the workpiece 9 can be changed by the drive cycle of the piston 4a and the like, and the floating speed can be adjusted by the shape of the floating guide 6, the oil temperature, and the like. The optimum dehydration time can be selected for this, and hot oil treatment can be performed with this dehydration time.

[Effect] According to the above-described hot oil processing method and hot oil processing apparatus, the object 9 is supplied from the lower side of the heated oil layer to perform hot oil dehydration and drying. Can play.

In the case of continuous mass treatment, the oil container 2
Is formed vertically deep and does not require a large oil surface area,
The area in which the hot oil contacts the air can be reduced, and alteration of the hot oil O due to oxidation can be suppressed. Therefore, the life of the oil is extended.

The object 9 supplied into the hot oil evaporates the water contained therein by the hot oil treatment.
The weight itself is reduced, and the water itself floats due to the buoyancy and the flow in the floating direction generated by the evaporated water vapor S. Therefore, the water does not stay near the supply port 2a and can be continuously supplied. Therefore, it is suitable for continuous hot oil processing for continuously processing a large amount of the workpiece 9.

Further, since it is not carried in from above the oil surface, even a material 9 having a low specific gravity or a slurry-like liquid, which floats before hot oil treatment, can be supplied into the high-temperature oil S, Until the surface 9 comes up, hot oil treatment can be sufficiently performed. In addition, since the entire peripheral surface of the processing object 9 is in contact with the high-temperature oil S, the hot oil processing can be performed uniformly and efficiently.

The floating time and the floating distance of the object 9 are compared not only with the depth of the oil S but also with the shape of the oil container 2 and the floating guide 6 and the screw feeder 6B mounted inside the oil container 2. It can be easily and easily controlled.

Since the water vapor S evaporating from the processing object 9 is also generated from the lower part of the oil container 2, the processing object 9 is naturally generated by its own buoyancy and the buoyancy of the water vapor S generated from the processing object 9. , And the floating of the steam S can be used for agitation, so that a transfer device and a driving force for the object 9 are not required.

Since the object 9 is supplied from the lower side of the oil container 2 and the oil O can be agitated by the rising force of the steam S generated in the lower part, the oil O on the lower side of the oil container 2 can be sufficiently utilized. It is possible, and because the oil temperature becomes uniform by this stirring,
Hot oil processing temperature can be equalized.

In addition, since a vertical oil tank can be used, the installation area of the hot oil treatment device can be small.

[Multi-stage hot oil treatment] Next, a multi-stage hot oil treatment for passing oil layers having different oil temperatures will be described.

In this multi-stage hot oil treatment, as shown in FIG. 4, the oil container 2C is formed as a vertical oil tank with a single container, and the heater 3 is arranged so that the oil temperature on the upper side is controlled. 9 is formed at a high temperature at which the water vapor in the workpiece 9 evaporates, and a temperature distribution layer is formed at a lower oil temperature at a lower temperature at which the water vapor in the processing object 9 does not evaporate. Through the oil layer O2.

In this case, in the lower oil layer O1, since the oil temperature is low and the oil pressure is high, no steam is generated and no upward force due to the steam is generated, and the convection effect is reduced. Although slightly, the object 9 rises due to its own buoyancy and slowly rises in the lower oil layer O1.
It rises while being accelerated in the upper oil layer O2.

[Effect] According to this multi-stage hot oil treatment, the object to be treated 9 is not exposed to high-temperature oil suddenly, and the temperature is gently raised in the low-temperature oil layer O1, so that it is close to boiling. Heat treatment is performed, and thereafter, the high-temperature oil layer O2 is subjected to tempura treatment. In this stewed state,
Since the oil pressure generated at the depth of the oil O is applied in addition to the pressure in the oil container 2C, it is possible to obtain a stewed state in the pressure cooker.

Since a sudden rise in temperature of the object 9 can be avoided, the influence on the properties and components of the object 9 can be reduced. In addition, since rapid steaming can be avoided, the shape of the workpiece 9 can be prevented from being destroyed by rapid steaming.

Therefore, by passing the material to be processed through the high and low temperature oil layers, it is possible to perform a higher degree of hot oil processing, and particularly when a food material is handled, cooking more suitable for the food material is performed. It can be performed.

By changing the depth of the oil layer, the hot oil processing time can be changed.
Is formed in a high-pressure vessel, and by applying pressure and pressure,
Since the processing temperature of the low-temperature section can be freely changed, and the temperature of the upper part can be changed by the heat supply speed of the upper heater, more various types of hot oil processing can be performed.

Also, since the temperature of the low-temperature part has little convection,
If necessary, a plurality of temperature layers can be provided, so that the conditions of the hot oil treatment can be changed more finely and complicatedly.

Further, it is possible to change the type of oil in the upper and lower oil layers, and in the low-temperature oil layer, since there is little convection, this low-temperature oil layer is further divided into a plurality of oil types and layers having different temperatures. It is also possible to extend the range of hot oil treatment.

[0076]

According to the hot oil processing method and the hot oil processing apparatus of the present invention as described above, the following effects can be obtained.

Since the material is not carried in from the oil surface, it is possible to supply an object having a low specific gravity or a slurry-like material which is almost liquid, which floats before the hot oil treatment, and the entire peripheral surface is kept at a high temperature until it floats. Hot oil can be evenly and efficiently treated by contact with oil.

Further, even in the case of continuous mass processing, the oil container is formed vertically deep and does not require a large oil surface area, so that the area where hot oil comes into contact with air can be reduced, and the hot oil is deteriorated by oxidation. Can be suppressed. Therefore, the life of the oil is extended.

The processing object supplied into the hot oil floats due to its own buoyancy and evaporated water vapor and does not stay near the supply port, so that it can be continuously supplied. Can be processed. In addition, since a lifting force is obtained by the buoyancy of the object and the flow of the vaporized water vapor floating, the transfer device for the object and the driving force thereof are not required.

Further, an object to be processed is supplied from the lower side of the container,
Since the oil can be agitated by the rising power of the steam generated in the lower part, the oil on the lower side of the container can be sufficiently used, and the oil temperature can be made uniform, and the hot oil processing temperature can be made uniform. Furthermore, since the oil tank can be a vertical oil tank, the installation area of the hot oil treatment device can be small.

By providing a floating speed adjusting mechanism such as a floating guide or a screw feeder, the floating time and the floating distance of the workpiece can be adjusted relatively easily and can be easily controlled.

In addition, multi-stage hot oil treatment is also possible. According to this multi-stage hot oil treatment, the object to be treated is gently heat-treated in a low-temperature oil layer, and then subjected to a high-temperature hot oil treatment in a high-temperature oil layer. it can. Therefore, the object to be processed can be passed through the high and low temperature oil layers to prevent a sharp rise in the temperature of the object to be processed, thereby reducing the influence on the properties and components of the object. Therefore, more advanced hot oil treatment can be performed, and particularly when food materials are handled, cooking more suitable for the food materials can be performed.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a hot oil treatment device according to a first embodiment of the present invention.

FIG. 2 is a configuration diagram of a hot oil treatment device according to a second embodiment of the present invention.

FIG. 3 is a configuration diagram of a hot oil treatment device according to a third embodiment of the present invention.

FIG. 4 is an explanatory diagram of a two-stage hot oil treatment according to the present invention.

FIG. 5 is a configuration diagram of a conventional hot oil processing apparatus.

[Explanation of symbols]

 1, 1A, 1B, 1C Hot oil processing device 2 Oil container 2a Supply port 3, 3A Oil heating device (heater) 4, 4A, 4B Supply device 4a Piston 4b Supply port 4c Injection nozzle 4d Cutter 5 Recovery device (bucket) 6 Floating guide 6A Screw feeder 9 Workpiece

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Isao Matsushima 5-6-4 Tsukiji, Chuo-ku, Tokyo Mitsui Engineering & Shipbuilding Co., Ltd. F-term (reference) 4B035 LE17 LP08 LT03 4B059 AA01 AB01 AB11 AC06 AC08 AC12 AE04 BA06 BE01 BE02 BE11 BE18 4D004 AA02 AA03 AA04 AC04 CA22 CA42 CA46 CA48 CB04 CB32 CB42 CB43 CC15 DA02 DA06 DA20 4D059 AA03 BD09 CB01 CB06 DB40 EB16 EB20

Claims (8)

[Claims] 1. A hot oil treatment method for heating and immersing an object to be treated in hot oil at a high temperature, wherein a supply port for the object to be treated is provided at a lower portion of a vertically deep oil container, The object to be treated is supplied from the supply port into the high-temperature hot oil stored in the hot oil, and the object to be treated is subjected to hot oil treatment while the object to be treated floats in the hot oil from the supply port toward the oil surface. A hot oil treatment method. 2. A hot oil processing method for heating and immersing an object to be processed in hot oil at a high temperature, wherein a supply port for the object to be processed is provided at a lower portion of a vertically deep oil container, The oil temperature of the low-temperature oil layer below the stored hot oil is maintained at or below the steam generation temperature, and the oil temperature of the high-temperature oil layer above the hot oil is maintained at or above the steam generation temperature. In the oil, the object to be processed is supplied from the supply port, and the object to be processed floats in the hot oil while floating the high-temperature oil layer after floating through the low-temperature oil layer from the supply port toward the oil surface. A hot oil treatment method, wherein a treatment object is treated with hot oil on the way. 3. An apparatus comprising: a vertically deep oil container for storing hot oil for heating an object to be processed at a high temperature; and a supply device for the object to be connected to a supply port provided at a lower portion of the oil container. The hot oil processing apparatus is characterized in that the oil container is formed to have a sufficient oil depth for predetermined hot oil processing while the object supplied from the supply port is floating. 4. The oil container further includes an oil heating device for heating the hot oil, a supply device connected to a supply port in a lower portion of the oil container, and a recovery device facing the oil surface. The hot oil treatment device according to claim 3, comprising: 5. The hot oil processing apparatus according to claim 3, wherein a floating speed adjusting mechanism for controlling a floating speed of the object to be processed is provided in the oil container. 6. The hot oil treatment apparatus according to claim 3, wherein the object to be treated is a fluid waste. 7. The hot oil processing apparatus according to claim 6, wherein the object to be processed is raw garbage sludge such as leftovers. 8. The hot oil processing apparatus according to claim 3, wherein the object to be processed is a food material.