JPH0749119B2 - Cooker - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial field of application> The present invention is directed to animals, chickens, seafood, vegetables, fruits, root vegetables, residues of these, sludge, beer dregs, kitchen waste, okara, manure, The present invention relates to a cooker that heat-treats animal or plant organic matter such as blood.

<Prior Art> As an example of a cooker for heat-treating organic matter of plants and animals, an oil temperature dehydrator for heating and dehydrating animals, seafood, plants or residues thereof with a non-volatile oil is disclosed in, for example, JP-B-53- It is known from Japanese Patent No. 15299 and Japanese Utility Model Publication No. 58-23278. These cookers are of a horizontal type in which a cylindrical can body is laid down horizontally, and heating steam is injected into the jacket part around the can body, the hollow rotating shaft that stirs the inside of the can body, and the hollow disk body attached to this rotating shaft. Then, the oil inside the can is indirectly heated from the inside and outside, and the object to be treated is heated in this oil to evaporate the moisture in the object to be treated.

<Problems to be Solved by the Invention> The above-described conventional cooker has a problem of poor thermal efficiency because it indirectly heats oil and an object to be processed in the apparatus by steam. In order to solve this problem, the can body containing the oil and the object to be treated may be directly heated from the outside by a burner. However, although such a direct heating method certainly has higher thermal efficiency than the indirect heating method, it causes local heating of the contents to cause a bumping phenomenon in which water evaporation from the bottom of the can violently occurs, or due to local high temperature. It raises new problems such as variations in the physical properties of the object to be processed, resulting in uneven quality of the object.

Therefore, the present invention is excellent in thermal efficiency as compared with the conventional indirect heating method by steam, and if problems such as bumping phenomenon and uneven quality of processed products due to local heating observed when directly heating an object to be processed by a burner It was made with the aim of providing an improved cooker that does not.

<Means for Solving Problems> The present invention for achieving the above object will be described with reference to FIG. 1 corresponding to the embodiment.

The cooker of the present invention is a cooker with stirring blades for heating animal and plant organic matter in a can body, in which the outer peripheral side wall 10a of the can body is surrounded by a closed jacket portion 30, and the jacket portion 30 is placed inside a furnace 36 having a burner 37. The can 10 is installed in the furnace 36 so that the volatile heat medium can be stored in the jacket 30.
31, the jacket outer wall 30a is used as the heat transfer surface to be heated, the volatile heat medium 31 in the jacket 30 is heated by the burner 37 of the furnace to evaporate the heat medium in the jacket, and the heat medium vapor is used to outside the can body. While heating the contents of the can body with the peripheral side wall as the heat transfer surface, the heat medium vapor itself condenses, and this evaporation / condensation is repeated, and a plurality of fins 34 are attached to the outer peripheral side wall 10a of the can body inside the jacket part 30. It is characterized in that the mounting end is inclined toward the outer end.

Further, in a preferred embodiment of the present invention, the jacket portion 30 is provided with an exchanging device provided with an emptying device for exchanging the volatile heat medium in the jacket portion and extracting air in the jacket portion.

<Operation> When the jacket outer wall 30a, which is the heat transfer surface to be heated, is heated by the burner 37 of the furnace, the volatile heat medium 31 enclosed in the jacket 30 evaporates and becomes high temperature vapor and diffuses into the jacket. . The high temperature heat transfer medium steam heats the contents of the can body using the outer peripheral side wall 10a of the can body as a heat transfer surface and condenses the heat transfer medium itself. That is, the evaporation and condensation of the volatile heat medium 31 are repeated, so that the jacket portion 30 functions as a heat pipe. Thus, the animal and plant organic matter in the can body 10 is uniformly heated without being locally heated, and the volatile heat medium 31 enclosed in the jacket portion 30 is heated by the burner 37, so that it is generated via the vial. The thermal efficiency can be improved as compared with the method of performing indirect heating using the evaporated vapor.

According to the present invention, by the action of the plurality of fins 34 arranged on the outer peripheral side wall 10a of the can body, the high-temperature steam of the heat medium is quickly and uniformly diffused in the jacket portion 30 to uniformly heat the contents of the can body. be able to. Furthermore, the condensate of the volatile heat medium 31 does not flow down along the outer peripheral side wall 10a of the can body,
Since it drips from the outer end (lower end) along the fins 34, it is possible to reduce the thickness of the liquid film layer flowing down the outer peripheral side wall 10a of the can body, and as a result, the thermal conductivity of the outer peripheral side wall 10a of the can body is improved. Can be kept.

According to the preferred embodiment of the present invention, since the volatile heat medium 31 in the jacket portion 30 can be exchanged, the optimum volatile heat medium is selected in response to changes in the type and physical properties of the object to be processed by the cooker. Can be used. Furthermore, since the air as the inert gas in the jacket part can be extracted and removed by the vacuum device, the inside of the jacket part can be filled with the gas / liquid phase of the volatile heat medium, and as a result, the heat pipe type Improve the effect of action.

Note that the rotating shaft 12 and the stirring blade 11 arranged in the can body 10 are rotated to stir the animal and plant organic matter in the can body, as in the conventional dehydrator.

<Examples> The present invention will be described in detail below with reference to the examples shown in the drawings.

FIG. 1 shows an embodiment in which the cooker of the present invention is applied to the oil temperature dehydrator, and in particular, since the boiler for generating steam for heating is eliminated, a boiler man is not necessary, and the pressure vessel is certified and regularly inspected. Is a device that can eliminate the need for. In this cooker, a cylindrical can body 10 is placed in a vertical shape, and a rotary shaft 12 provided with a stirring blade 11 made of a ribbon screw is rotatably arranged in the can body 10. Axis of rotation
12 is rotated by a motor 14 via a rotation transmission device 13. At the top of the can body 10, an inlet pipe 15 for an object to be treated, which is made of animal and plant organic matter, is inserted, while at the bottom of the can body, a tapered taper surface 16 is attached, and a treated product take-out pipe 17 is downward from an opening at the center of the bottom face. It extends so that the processed product can be taken out through the rotary valve 18. Further, the top of the can 10 is provided with an outlet 19 for vapor generated by evaporation of water in the object to be treated, and the vapor outlet 19 is connected to a decompression device 20 including a cyclone 21, a condenser 22 and a vacuum pump 23. Therefore, the vapor generated in the can is sucked and the pressure in the can is maintained at a predetermined depressurized state. Workpiece inlet pipe
The inlet pipe 15 is provided so that the object to be treated introduced into the can body 10 from 15 is not sucked together with the steam from the steam outlet 19.
It is desirable to angle the workpiece inlet pipe 15 so that the tip opening faces the direction opposite to the vapor discharge port 19, and it is preferable to make it downward toward the inner wall of the can body 10. The can body 10 further includes an oil inlet pipe 24 opening to the bottom tapered surface 16,
An oil overflow pipe (25) opening downward from the tip of the workpiece inlet pipe (15) is provided. The oil introduced into the can body 10 from the oil inlet pipe 24 depends on the type of the object to be processed, the use of the object to be processed, etc.
It can be appropriately selected from animal oils, vegetable oils, mineral oils, waste oils thereof, and the like, and may be the oil contained in the object to be treated itself, or a mixture of these various oils. Arms 26 are attached to the upper and lower parts of the rotary shaft 12 substantially horizontally from the rotary shaft 12, and the arm 26, 26 is provided with a shaving plate so as to urge the arms 26, 26 outward through a spring (not shown). 27 is attached, and when the object to be processed or the object to be processed introduced from the inlet pipe 15 adheres to the inner wall of the can body 10, it is scraped off. On the other hand, a scraper 29 is slidably attached to the lower part of the rotary shaft 12 via an arm 28 along the can body bottom taper surface 16, and the upper end thereof is tilted so as to project in the rotational direction of the rotary shaft 12. The scraper 29 collects the processed products in the lower take-out pipe 17.

The outer peripheral side wall 10a of the can body 10 is surrounded by the jacket portion 30. The jacket portion 30 is hermetically sealed, its internal air is exhausted, and a predetermined amount of volatile heat medium 31 and its vapor are enclosed. Further, an external circulation system pipe 33 for pumping up the volatile heat medium 31 enclosed in the jacket portion 30 with a pump 32 and circulating it to the upper portion of the jacket portion is also provided. As the volatile heat medium 31, an aromatic hydrocarbon that can be used at high temperature and has excellent thermal stability, for example, "NEO-SK 260".
(Trade name of Soken Chemical Industry Co., Ltd.) can be preferably used.

Further, the outer peripheral side wall 10a of the can inside the jacket portion 30 extends downward from its mounting end toward the outer end, and slopes from the left end to the right end or the left end of the mounting end. A plurality of fins 34 are attached. Further, a plurality of heat transfer fins 35 are arranged on the side wall of the outer wall 30a of the jacket so as to form an oblique spiral shape as a whole, and the tips thereof are attached in the vicinity of the furnace wall 36. The function of these fins 34 and 35 will be described later.

The can body 10 having the jacket portion 30 is arranged inside a furnace 36 having a burner 37. At this time, the can body outer peripheral side wall 10a
The jacket portion 30 provided in the furnace is placed in the furnace, and the top of the can body projects outside the furnace. The furnace wall 36a of this furnace is made of, for example, steel on the outer side and is made of, for example, heat-resistant brick, castable refractory, mortar or body heat steel on the inner side, and a burner 37 is arranged on the side wall of the furnace bottom so that the jacket portion 30 is volatile. The heat medium enclosure is heated from the outside by this burner. A chimney 38 is attached to the top of the furnace, and the treated product extraction pipe 17, the oil inlet pipe 24, the oil overflow pipe 25, and the external circulation system pipe 33 communicating with the can body 10 extend through the furnace wall 36a to the outside.

In the embodiment of FIG. 1, the rotary shaft 12 and the stirring blade 11 arranged in the can body 10 are hollow, and the hollow hollow shaft and the hollow stirring blade communicate with each other by making the upper and lower support arms 39 hollow. In addition, the heat medium inflow pipe 41 and the heat medium outflow pipe 42 are attached to the upper and lower ends of the rotary shaft 12 via the rotary joints 40, 40, respectively, and the heat medium vapor generated in the jacket portion 30 is guided to the outside from the pipe 43. Heat medium inflow pipe 41
It is flowing from. Further, the condensate flowing out from the heat medium outflow pipe 42 is temporarily stored in the tank 44, and the pump 45 is used to form the pipe 46.
It is circulated to the upper part of the jacket through.

In order to sufficiently flow the heat medium from the hollow portion of the rotating shaft 12 through the hollow support arm 39 to the hollow portion of the stirring blade 11, the hollow support arm serving as an inlet and an outlet of the heat medium to the stirring blade 11.
It is desirable to provide an orifice 47 on the rotary shaft 12 at an intermediate position of mounting 39, 39 to adjust the heat medium flow rate (pressure loss) in the hollow part of the rotary shaft 12.

Next, the operation of the cooker of this embodiment will be described. First, oil is injected from the oil inlet pipe 24, and the can body 10 is filled with oil until it overflows from the oil overflow pipe 25 to a certain level L. Next, the burner 37 of the furnace 36 heats the volatile heat medium 31 enclosure of the jacket 30. This heat medium
31 evaporates, becomes high-temperature vapor, diffuses into the closed space inside the jacket portion 30, and heats the oil inside the can. When the oil reaches a predetermined temperature, the animal and plant organic matter as a raw material is introduced into the can body 10 through the article inlet pipe 15. The introduced object to be treated is put into the oil by the action of the shaving plate 27 which rotates together with the rotating shaft 12 without adhering to the inner wall of the can body 10 and dehydrated at the oil temperature. The object to be treated in the oil gradually descends in the can body 10 while being stirred as it is lifted up by the action of the stirring blade 11, that is, the ribbon screw, and the tapered surface 16 at the bottom of the can body.
And by the action of the scraper 29, collected in the treated product extraction pipe 17,
It is taken out through the rotary valve 18. Moisture in the object to be processed is evaporated, and is sucked and discharged from the steam discharge port 19 by the decompression device 20.

The high-temperature vapor of the volatile heat medium 31 that has diffused into the jacket portion 30 is gradually cooled and condensed, and again becomes a liquid and descends. Therefore, the jacket portion 30 acts as a heat pipe as a whole. When the vapor of the volatile heat medium 31 diffuses into the jacket portion 30, by the action of the large number of fins 34 arranged on the outer peripheral side wall 10a of the can body, the jacket portion is formed.
The high-temperature steam is quickly and uniformly diffused in the container 30, and as a result, the contents of the can body 10 can be uniformly heated. Further, when the condensate of the volatile heat medium 31 descends along the outer peripheral side wall 10a of the can body, heat conduction is deteriorated, but the condensate does not flow down along the outer peripheral side wall 10a of the can body due to the action of the fins 34, and quickly. Since the droplets can be dropped from the outer end of the fin, that is, the lower end, good heat conduction can be maintained on the outer peripheral side wall 10a of the can body.

If the fins 34 on the outer side wall of the can body are formed so that their outer ends are in contact with the inner surface of the jacket outer wall 30a as shown in FIG. It flows down while forming a liquid film on the peripheral side surface. Since the jacket outer wall 30a serves as a surface for receiving heat from the burner 37, the liquid film becomes high temperature steam again while flowing down on the inner peripheral side surface, so that the heat can be efficiently transferred to the heat medium. In addition, the jacket 30
The heat medium circulated to the upper part also flows down while forming a liquid film on the inner peripheral side surface of the jacket outer wall 30a, so that the heat medium can be efficiently evaporated during this period.

Further, by using the punching metal for the fins 34 as shown in FIG. 2, it is possible to improve the flow of the heat medium vapor inside the jacket portion 30. Further, as shown in FIG. 3, by providing a wick 48 made of a wire mesh or the like on the inner peripheral side surface of the jacket outer wall 30a which is the heat receiving surface, the condensate can be circulated along the inner peripheral side surface of the jacket outer wall 30a well. Evaporation can be accelerated.

On the other hand, by the action of the heat transfer fan 35 attached to the side wall portion of the jacket outer wall 30a, the heat generated in the burner 37 is discharged from the chimney 38 while rising in a spiral shape along the jacket outer wall 30a. As a result, the entire outer wall 30a of the jacket that serves as the heat receiving surface can be uniformly heated, and the jacket 30
The heat medium at the bottom and the heat medium liquid film flowing down on the inner peripheral side surface of the jacket outer wall 30a can be evaporated more efficiently.

In addition, in this embodiment, the heat medium vapor extracted from the pipe 43 and introduced through the heat medium inflow pipe 41 is circulated through the hollow rotating shaft 12 and the hollow agitating blade 11, and the can body contents from the center of the can body 10 as well. So that it can be heated.

FIG. 4 shows another embodiment of the present invention and the cooker, and the same members as those in the embodiment of FIG. 1 are designated by the same reference numerals and the description thereof will be omitted. In the embodiment shown in FIG. 4, the jacket outer wall 30a provided in the embodiment shown in FIG.
The external circulation system (the pipe 33 and the pump 32) for the heat transfer fins 35 and the volatile heat medium 31 is not provided, and the structure is simplified as a whole. Also, in place of the circulation system (pipe 43, tank 44, pump 45 and pipe 46) for circulating the volatile heat medium through the hollow rotating shaft 12 and the hollow stirring blade 11 in the embodiment of FIG. 1, a small boiler 49 is used. The condensed water vapor is introduced from the heat medium inflow pipe 41 to be circulated in the hollow rotating shaft 12 and the hollow stirring blade 11, and the condensed water is in the heat medium outflow pipe.
An indirect heating system is circulated from 42 to the small boiler 49. In the embodiment of FIG. 4, the outer ends, or lower ends, of the fins 34 provided on the outer peripheral side wall 10a of the can body are not projected so as to contact the inner surface of the outer wall 30a of the jacket portion. It is possible to effectively prevent the heat conduction from being deteriorated by flowing down along the peripheral side wall 10a.

The processing conditions in the can 10, such as the oil temperature, need to be changed according to the type and physical properties of the object to be processed, and the type of the volatile heat medium 31 enclosed in the jacket 30 is changed according to the change in the processing conditions. It is desirable to be prepared. FIG. 5 shows an embodiment of the tucker of the present invention equipped with a device for exchanging the volatile heat medium 31 in the jacket part, in which the drain valve V1 is provided at the bottom part of the jacket part 30 and from the upper part. A pipe 54 connected to the vacuum device 50 is drawn out, a valve V2 is arranged in the middle of the pipe, and a valve V3 is arranged in a branch pipe communicating with the atmosphere from the pipe 54. The vacuum device 50 includes a cooler 51, a drain separator 52, and a vacuum pump 53. The operation of replacing the volatile heat medium 31 in the jacket 30 is as follows. First, the valves V2 and V3 are opened to bring the inside of the jacket portion 30 to normal pressure, and then the valve V1 is opened to remove the volatile heat medium 31. Next, different kinds of volatile heat mediums are injected from the valve V1, and when the jacket 30 has reached a predetermined level, the valves V1 and V3 are closed, and the air in the jacket 30 is evacuated by the vacuum pump 53 through the pipe 54. . Usually, the air is taken out at room temperature, but depending on the type of the volatile heat medium, it may be easier to take out the air by heating a little. The vapor of the volatile heat medium is extracted from the jacket portion 30 together with the air, but the volatile heat medium vapor is condensed by the cooler 51 and recovered by the drain separator 52. Thus, when the air is extracted from the jacket portion 30, the valve V2 is closed. The vacuum device 50 may be shared with the decompression device 20 used to suck the steam from the steam discharge port 19 of the can body.

In the description of the operation of the above examples, an example was shown in which the can 10 was first filled with oil, and the oil was heated to a predetermined temperature, and then the animal or plant organic matter as a raw material was introduced into the can 10. However, without being limited to this example, after introducing both the oil and the animal and plant organic matter that is the raw material into the can body 10, the oil temperature may be dehydrated by heating, and further the raw material is first introduced into the can body 10. Then, the oil may be heat-treated, and the oil may be added according to the treatment condition, and there are various usage forms.

Further, in the above embodiment, an example in which the cooker of the present invention is used in an oil temperature dehydrator is shown, but the cooker is not limited to this, and can be used as a normal cooker such as fish meal, feather meal, and rendering. Of course.

<Effects of the Invention> As described above, the cooker of the present invention is provided with the jacket portion acting as a heat pipe on the outer peripheral side wall of the can body, and the volatile heat medium enclosed in the jacket portion is directly heated by the burner. , The thermal efficiency can be improved compared to the conventional indirect heating method using water vapor that is used in this type of cooker, and the can can be evenly heated without locally heating the contents of the can, resulting in uneven quality. Can be obtained.

Particularly, according to the apparatus of the embodiment shown in FIGS. 1 and 4, since the cylindrical can body is not the horizontal type as in the conventional apparatus but the vertical type, the area is smaller than that of the horizontal type. Can be made compact. In addition, when the non-volatile oil used for oil-temperature dehydration of the object to be treated is housed in the can body, the area in which the oil contacts the air in the vertical type is more than in the horizontal type. Can be reduced, and as a result, deterioration (oxidation) of oil can be reduced. Further, the conventional cooker has a heat dissipation, oil scattering, labor and risk of charging / discharging because the charging / discharging of raw materials is a batch type. Since the animal and plant organic matter which is the above is put in from the top of the can body and taken out from the bottom, it is possible to continuously treat as necessary,
The above problems due to the batch method can be solved. Furthermore, in the device of the present invention, since a large number of fins are attached to the outer peripheral side wall of the can body in the jacket, the high temperature vapor of the volatile heat medium enclosed in the jacket can be diffused uniformly in the jacket part, resulting in a can body. Since the fins prevent the condensate of the steam in the jacket from flowing along the outer peripheral side wall of the can body, the thermal efficiency can be significantly improved.

Further, in the apparatus of the embodiment shown in FIG. 1, since the heat transfer fins are provided also on the outer wall of the jacket part, the periphery of the outer wall of the jacket part, which is the heat receiving surface of the burner, can be uniformly and entirely heated to improve the heat transfer. be able to. Further, since the outer ends of the fins provided on the outer peripheral side wall of the can are formed so as to contact the inner peripheral side surface of the outer jacket wall, the condensate flowing down the fin surface forms a liquid film on the inner peripheral side surface of the outer jacket wall. It can be made to flow down, and evaporation to high temperature steam can be promoted further. In particular, the embodiment shown in FIG. 1 has the advantage that no boiler is installed because steam is not used as the heat medium, so that a boiler man is not required, and approval of the pressure vessel and its periodic inspection are also unnecessary.

Further, according to the apparatus of the embodiment shown in FIG. 5, since the volatile heat medium enclosed in the jacket portion is provided with the exchange means,
The volatile heat medium in the jacket can be replaced according to changes in processing conditions caused by changes in the type and physical properties of the object to be processed,
It is possible to use a volatile heat medium that is optimal for the desired processing conditions.Furthermore, air as an inert gas in the jacket part is removed using a vacuum device, and the jacket part is filled with the gas / liquid phase of the heat medium. By doing so, the heat efficiency of the cooker can be remarkably improved in combination with the effect of the heat pipe action being remarkably improved.

[Brief description of drawings]

FIG. 1 is an explanatory view showing a preferred embodiment of the cooker of the present invention, FIGS. 2 and 3 are enlarged explanatory views showing a modified example of the fin and the structure in the vicinity of the fin, and FIG. 4 is another view of the cooker of the present invention. FIG. 5 is an explanatory view showing another embodiment, and FIG. 5 is an explanatory view showing still another embodiment of the cooker of the present invention. 10 …… Inside the can, 10a …… Outer side wall of the can, 11 …… Stirring blade, 1
2 …… Rotary shaft, 19 …… Steam discharge port, 30 …… Jacket part, 30 …… and outer wall of jacket part, 31 …… Volatile heat medium,
34,34 '... Fins, 36 ... Furnace, 37 ... Burners.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification number Internal reference number FI Technical indication C05F 3/06 D 7188-4H 9/02 D 7188-4H (72) Inventor Tadahiro Higashi Osaka, Osaka 5-1-1 Kitaguchi, Higashiyodogawa-ku, Higashi-shi, Japan (72) Inventor Isao Nagaishi 285-13, Shinkawa, Akame-cho, Nabari-shi, Mie (72) Toshinori Kameoka 136, Midorigaoka, Kuramochi-machi, Nabari-shi (72) Inventor Michio Sakimoto 3-5, Ume-sato, Tomitabayashi-shi, Osaka (72) Inventor Yoichi Ino 4-4-2-25-406, Takawashi, Habikino-shi, Osaka (72) Inventor Masakazu Irie, Osaka 2-8-11 Satsukinohigashi, Mihara-cho, Minamikawachi-gun (72) Inventor Yoshihiko Yoshida 1-1-18 Tsudaminami-cho, Hirakata-shi, Osaka (72) Inventor Izumi Shimizu 1-9-3 Kamatahoncho, Ota-ku, Tokyo Niigata Steel Co., Ltd. (72) Inventor Yoshiharu Koyanagi 1-9-3 Kamatahonmachi, Ota-ku, Tokyo Inside Niigata Ironworks Co., Ltd. (72) Inventor Shuzo Nakazono 1-13-21, Tenjin, Chuo-ku, Fukuoka-shi, Fukuoka Prefecture Protein resource development Incorporated (72) Inventor Fumio Nishikawa 1-13-21 Tenjin, Chuo-ku, Fukuoka City, Fukuoka Prefecture Protein Resource Development Co., Ltd. Inventor Masumi Taguchi 1-2-13 Tenjin, Chuo-ku, Fukuoka-shi, Fukuoka Within Protein Resources Development Co., Ltd. (56) Reference Japanese Unexamined Patent Publication No. 50-65958 (JP, A) No. 48-72162 (JP, U) No. 59-27725 (JP, U) Japanese Patent No. 52-10096 (JP, B2) JP-B 56-52544 (JP, B2) JP-B 49-35152 (JP, B2) JP-B 5-7323 (JP, Y1)

Claims (10)

[Claims] 1. A cooker with stirring blades for heating animal and plant organic matter in a can body, wherein the outer peripheral wall of the can body is surrounded by a closed jacket part, and the jacket part is placed inside a furnace having a burner. The can body is installed in the furnace, the volatile heat medium is enclosed in the jacket portion, and the volatile heat medium in the jacket portion is heated by the burner of the furnace with the outer wall of the jacket portion as the heat transfer surface to be heated. In the jacket portion, the heating medium vapor heats the contents of the can body by using the outer peripheral side wall of the can body as a heat transfer surface, and the heating medium vapor itself condenses, and the evaporation and condensation are repeated, and A cooker characterized in that a plurality of fins are attached to the outer peripheral side wall of the can body in the jacket portion, and the fins are inclined from the attachment end toward the outer end. 2. The cooker according to claim 1, wherein the can body has a cylindrical shape and is of a vertical type, and a vapor discharge port communicating with a decompression device is provided at a top portion of the can body. 3. The cooker according to claim 1 or 2, wherein the fins are mounted so as to be inclined from the left end to the right end or from the right end to the left end of the mounting end thereof. . 4. The cooker according to claim 1, 2 or 3, wherein a plurality of heat transfer fins are attached to the outer wall of the jacket portion. 5. An external circulation system for pumping a volatile heat medium enclosed in the jacket portion by a pump to circulate the volatile heat medium to the upper portion of the jacket portion. The cooker according to item 3 or 4. 6. A cooker with stirring blades for heating animal and plant organic matter in a can body, wherein the outer peripheral side wall of the can body is surrounded by a closed jacket part, and the can part is placed inside a furnace having a burner. The body is installed in the furnace, the volatile heat medium is enclosed in the jacket portion, and the outer wall of the jacket portion is used as a heat transfer surface to be heated to heat the volatile heat medium in the jacket portion by the burner of the furnace. The contents of the can are evaporated by evaporating in the jacket, the outer peripheral side wall of the can is used as a heat transfer surface by the heat medium vapor, the heat medium vapor itself is condensed, and the evaporation and condensation are repeated, and the jacket A plurality of fins are attached to the outer peripheral side wall of the can inside the section, and the fins are inclined from the attachment end toward the outer end, and the volatile heat medium in the jacket section is exchanged and the space in the jacket section is replaced. Cooker exchange apparatus provided with a withdrawal vacuum apparatus for performing is characterized by providing on the jacket portion. 7. The cooker according to claim 6, wherein the can body has a cylindrical shape and is of a vertical type, and a steam discharge port communicating with a decompression device is provided at a top portion of the can body. 8. The cooker according to claim 6 or 7, wherein the fins are mounted so as to be inclined from the left end of the mounting end to the right end or from the right end to the left end. . 9. The cooker according to claim 6, wherein a plurality of heat transfer fins are attached to the outer wall of the jacket portion. 10. An external circulation system for pumping a volatile heat medium enclosed in the jacket portion by a pump to circulate the medium to the upper portion of the jacket portion. The cooker according to item 8 or 9.