JP2015000022A - Apparatus and method for heat treatment of granular foodstuff using superheated steam - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an apparatus and a method for heat treatment of granular foodstuffs using superheated steam, in which uniformity of heat treatment of granular foodstuffs can be increased and quality of the heat treatment of the granular foodstuffs can be increased, and also the heat treatment can be efficiently accomplished.SOLUTION: An apparatus 10 for heat treatment of granular foodstuffs is configured such that a screw conveyor 12 is rotatably supported in a casing 11, and superheated steam is supplied into the casing 11 and the granular foodstuffs 16 inputted in the casing 11 are heat-treated with the superheated steam. The screw conveyor 12 comprises a screw shaft 14 and a screw blade 15 helically formed in an outer circumferential surface of the screw shaft 14. Auxiliary agitation blades 20 for scooping the granular foodstuffs 16 and assisting the stirring of the granular foodstuffs 16 are installed so as to be extended in the axial direction of the screw shaft 14, between mutually facing screw blade portions.

Description

  The present invention heats granular foods such as coffee beans in a food factory or the like in a state in which baking unevenness is suppressed by superheated steam, and improves the quality of the granular food. The present invention relates to a processing apparatus and a heat treatment method for granular foods.

  In general, by heating the granular food with hot air or superheated steam, the surface of the granular food is burnt, the taste is improved, and the moisture in the granular food is reduced to give a fragrant flavor or digestion. It can be changed to an easy property. For example, when coffee beans are heat-treated, a unique aroma is produced in addition to the sweetness, bitterness, and sourness of coffee.

  An organic carbonization apparatus related to this type of heat treatment apparatus is disclosed in Patent Document 1. That is, this carbonization apparatus includes a processing cylinder having an inlet and an outlet for a material to be processed, conveying means for conveying the material to be processed in the processing cylinder, and dry steam at 300 to 500 ° C. in the processing cylinder. It has a steam supply device for supplying and an external heating device for heating the processing cylinder. According to this carbonization processing apparatus, the activated carbon can be made into high-quality activated carbon in a short time by one-step processing.

JP-A-11-223476

  In the carbonization processing apparatus having the conventional configuration described in Patent Document 1 described above, the organic matter charged into the processing cylinder from the charging port is guided to a feed screw as a conveying means and moves to the discharging port. At this time, the organic substance moves while being agitated by the feed screw, but the organic substance is moved forward by the feed screw in a state where it is accumulated in the lower part of the treatment cylinder due to gravity. Absent. Accordingly, there has been a problem that it is difficult to uniformly carbonize the organic substance with dry steam, the carbonization of the organic substance is likely to be uneven, and the efficiency of the carbonization process is poor.

  Therefore, the object of the present invention is to improve the uniformity of the heat treatment of the granular food, to improve the quality of the heat treatment of the granular food, and to efficiently perform the heat treatment. An object of the present invention is to provide a granular food heat treatment apparatus and a granular food heat treatment method using superheated steam.

  In order to achieve the above object, the granular food heat treatment apparatus using superheated steam according to the first aspect of the present invention rotatably supports the screw conveyor in the casing and supplies superheated steam to the casing. A granular food heat treatment apparatus that heats the granular food charged in the casing with superheated steam, wherein the screw conveyor includes a screw shaft and screw blades formed in a spiral shape on the outer peripheral surface thereof. Auxiliary stirring blades are provided between the screw blades so as to scoop up the granular food and assist the stirring of the granular food so as to extend in the axial direction of the screw shaft.

  The heat treatment apparatus for granular food using superheated steam according to a second aspect of the present invention is the invention according to the first aspect, wherein the auxiliary stirring blade is formed in a plate shape and is installed at the outer peripheral position of the screw blade. It is characterized by that.

  The granular food heat treatment apparatus using superheated steam according to claim 3 is the invention according to claim 2, wherein the auxiliary stirring blade is screwed on the inner peripheral side from the outer peripheral side in the radial direction of the screw shaft. It is arranged to be inclined so as to be located behind the rotation direction of the shaft.

  The heat treatment apparatus for granular food using superheated steam according to claim 4 is the invention according to claim 2 or claim 3, wherein the auxiliary stirring blades are spaced equidistantly in the circumferential direction of the screw blades. A plurality of rows are provided.

  The granular food heat treatment apparatus using superheated steam according to claim 5 is the invention according to any one of claims 1 to 4, wherein the screw shaft is constituted by a cylinder, and the cylinder A superheated steam generating mechanism is provided in the body, and the superheated steam generated by the superheated steam generating mechanism is configured to be jetted into a heat treatment space between the casing and the screw shaft. To do.

  The granular food heat treatment apparatus using superheated steam according to claim 6 is the invention according to claim 5, wherein the screw shaft is constituted by a cylinder, and a superheated steam generation mechanism is provided in the cylinder. The superheated steam generated by the superheated steam generation mechanism is jetted into a heat treatment space between the casing and the screw shaft.

  The heat treatment apparatus for granular food using superheated steam according to claim 7 is the invention according to any one of claims 1 to 6, wherein the casing includes superheated steam or superheated steam and hot air. A superheated steam supply hole for supplying the water to the auxiliary stirring blade is opened.

  The heat treatment method for granular foods using superheated steam according to claim 8 is the heat treatment for granular foods using the heat treatment apparatus for granular foods according to any one of claims 1 to 7. In this method, the granular food is put into the casing, and the granular food is heat-treated while being moved by the screw blades of the screw conveyor in the presence of superheated steam, and the granular food is scooped up by the auxiliary stirring blades and stirred. It is characterized by heat-treating.

According to the present invention, the following effects can be exhibited.
In the heat treatment apparatus for granular foods using superheated steam of the present invention, a screw conveyor is rotatably supported in the casing, superheated steam is supplied into the casing, and the granular food charged in the casing is superheated steam. Heat-treated. Between the screw blades of the screw conveyor, auxiliary stirring blades that assist the stirring of the granular food are installed so as to extend in the axial direction of the screw shaft.

  Therefore, the granular food charged in the casing moves as the screw blades rotate, and the granular food accumulated in the lower part of the casing is scooped up by the auxiliary stirring blades. The sprinkled granular food is rotated in a state of being placed on the auxiliary stirring blade, and falls when the auxiliary stirring blade reaches the upper portion, so that the granular food is forcibly stirred. Since such forced stirring of the granular food is repeatedly performed by the auxiliary stirring blade between the screw blades, the stirring of the granular food is effectively continued. Therefore, the uniformity of the heat treatment for the granular food can be improved, and the quality of the heat-treated granular food can be improved.

  Therefore, according to the heat treatment apparatus for granular foods using superheated steam of the present invention, the uniformity of the heat treatment of the granular food can be improved, the quality of the heat treatment of the granular food can be improved, and the heating There exists an effect that a process can be performed efficiently.

The schematic sectional drawing which shows the whole heat processing apparatus for granular foods using the superheated steam in embodiment. The disassembled perspective view of the heat processing apparatus for demonstrating a superheated steam production | generation mechanism. (A) is the left view of the screw shaft which comprises a superheated steam production | generation mechanism, (b) is the right view of a screw shaft. (A) is a side view which shows the support wall of a screw shaft, (b) is a side view which shows the end wall and support wall of a screw shaft. Sectional drawing for showing the some auxiliary | assistant stirring blade provided in the screw blade | wing of the screw conveyor arrange | positioned in a casing. The partial expansion perspective view which shows the state by which the granular food was scooped up by the auxiliary | assistant stirring blade laid over the screw blade of the screw conveyor.

Hereinafter, embodiments of the present invention will be described in detail with reference to FIGS.
As shown in FIG. 1, the screw conveyor 12 in the casing 11 which comprises the heat processing apparatus 10 for granular foods is supported by the several support member 13 in the both ends. The screw conveyor 12 includes a screw shaft 14 located at the center thereof and screw blades 15 formed in a spiral shape on the outer peripheral surface of the screw shaft 14. The screw shaft 14 can be rotated by a rotational drive source (not shown). An input pipe 17 for supplying the granular food 16 into the casing 11 is connected to the upper part on the base end side (the right end side in FIG. 1) of the casing 11, and the lower part on the front end side of the casing 11 is heated. A discharge pipe 18 for discharging the granular food 16 is connected. As the granular food 16, for example, coffee beans, brown rice, nuts and the like are used.

  As shown in FIGS. 1 and 5, a plate-like auxiliary stirring blade 20 is installed at an outer peripheral position between the spirally formed screw blades 15 so as to extend in the axial direction of the screw shaft 14. The auxiliary stirring blades 20 are made of the same metal as the screw blades 15 and are provided in a plurality of rows (eight rows in this embodiment) at equal intervals in the circumferential direction of the screw blades 15. Each auxiliary stirring blade 20 is inclined and arranged so that the inner peripheral side is located behind the outer peripheral side in the rotation direction of the screw shaft 14 (clockwise direction indicated by the arrow in FIG. 5) with respect to the radial direction of the screw shaft 14. . In this embodiment, the inclination angle α of the auxiliary stirring blade 20 is set to 45 degrees. Then, as the screw shaft 14 rotates, the screw blade 15 moves the granular food 16 forward, and the auxiliary stirring blade 20 scoops up the granular food 16 to stir the granular food 16.

  As shown in FIG. 5, the casing 11 is composed of a pair of semi-cylindrical upper divided body 11a and lower divided body 11b, and is formed to project from both sides of the upper divided body 11a and the lower divided body 11b. The upper connecting piece 19a and the lower connecting piece 19b are connected by a bolt 21.

  As shown in FIG. 1, the screw shaft 14 is formed of a cylindrical body, and a superheated steam generation mechanism 22 is provided in the screw shaft 14. The superheated steam generation mechanism 22 will be described.

  As shown in FIGS. 1 and 2, an end wall 23 and a supporting wall 24 inside thereof are superposed on the base end portion (right end portion in FIG. 2) of the screw shaft 14, and the tip end of the screw shaft 14 is also formed. The end wall 25 and the inner support wall 26 are superposed on the part. As shown in FIGS. 3A and 4A, the end wall 25 is provided with a first through hole 28 through which the saturated water vapor introduction pipe 27 is inserted. Further, the second through hole 29 is located at a position rotated 90 degrees in the circumferential direction from the first through hole 28, the fourth through hole 31 is located at a position rotated 90 degrees in the circumferential direction from the second through hole 29, and the fourth through hole. A third through hole 30 is formed at a position rotated 90 degrees in the circumferential direction from the hole 31.

  As shown in FIGS. 2, 3 (a) and 4 (a), the support wall 26 faces the second insertion hole 32 and the third penetration hole 30 at a position facing the second penetration hole 29. A third insertion hole 33 is formed at a position, and a fourth insertion hole 34 is formed at a position facing the fourth through hole 31. In addition, a first communication path 35 is formed in the support wall 26 between a position facing the first through hole 28 and the second insertion hole 32, and the third insertion hole 33 and the fourth insertion hole 34 are connected to each other. A second communication path 36 is provided between them. A saturated water vapor introducing pipe 27 inserted through the first through hole 28 is connected to the first communication path 35.

  As shown in FIGS. 2, 3 (b) and 4 (b), the support wall 24 has a second insertion hole portion 37, a third insertion hole at a position facing the second insertion hole 32 of the support wall 26. A fourth insertion hole 39 is formed at a position facing the third insertion hole 38 and the fourth insertion hole 34 at a position facing the hole 33. Further, a first communication portion 40 is formed in a U shape between the second insertion hole portion 37 and the third insertion hole portion 38 of the support wall 24, and the fourth insertion hole portion 39 and the center portion of the support wall 24 are formed. The 2nd communication part 41 is formed between these. Further, a central hole 43 communicating with the second communication portion 41 of the support wall 24 is provided at the center of the end wall 23, and four discharge holes 44 are spaced from the central hole 43 in the circumferential direction by 90 degrees. Are formed radially.

  As shown in FIG. 2, a second heating tube 45 is disposed so as to connect the second insertion hole 32 of the support wall 26 and the second insertion hole portion 37 of the support wall 24. A third heating tube 46 is disposed so as to connect the third insertion hole 33 of the support wall 26 and the third insertion hole 38 of the support wall 24. Further, a fourth heating pipe 47 is disposed so as to connect the fourth insertion hole 34 of the support wall 26 and the fourth insertion hole 39 of the support wall 24. The second heating tube 45, the third heating tube 46, and the fourth heating tube 47 are arranged in parallel with the axial direction of the screw shaft 14. In each of the second heating tube 45, the third heating tube 46, and the fourth heating tube 47, a rod-shaped electric heater 49 having helical heat exchange fins 49a on the outer peripheral surface is inserted.

  Then, the saturated water vapor introduced from the saturated water vapor introduction pipe 27 flows from the first communication path 35 to the second heating pipe 45 through the second insertion hole 32 and is heated, and the first communication hole 35 is connected to the first communication hole 35. It flows to the 3rd heating pipe 46 via the part 40, and is further heated. Subsequently, it flows from the third insertion hole 33 through the second communication path 36 to the fourth heating pipe 47 through the fourth insertion hole 34 and is further heated to generate superheated steam. That is, the second heating pipe 45, the third heating pipe 46, and the fourth heating pipe 47 are connected in series, and saturated steam is heated to a high temperature by the electric heater 49 to generate superheated steam. The generated superheated steam flows from the fourth insertion hole portion 39 through the second communication portion 41 to the four discharge holes 44 from the center hole 43 of the end wall 23.

  On the peripheral wall of the screw shaft 14, superheated water vapor ejection holes 51 are provided so as to form eight rows at regular intervals in the axial direction of the screw shaft 14 and at equal intervals in the circumferential direction. Then, the superheated steam discharged from the discharge hole 44 is jetted from the jet hole 51 to the heat treatment space 48 between the casing 11 and the screw shaft 14 through the inner space of the screw shaft 14. . The temperature of the superheated steam is preferably set in the range of 150 to 400 ° C, for example, 330 ° C.

  As shown in FIG. 1, a plurality of superheated steam supply holes 50 for supplying superheated steam toward the auxiliary stirring blade 20 are opened in the casing 11 at regular intervals in the axial direction of the screw shaft 14. Yes. The temperature of the superheated steam supplied from the superheated steam supply hole 50 is preferably set to 350 ° C, for example, in the range of 150 to 400 ° C. Note that a mixture of superheated steam and hot air can also be supplied from the superheated steam supply hole 50. In this case, the temperature of the hot air is set in the temperature range of the superheated steam.

Next, a heat treatment method using the granular food heat treatment apparatus 10 configured as described above will be described together with its action.
As shown in FIG. 1, when the granular food 16 such as coffee beans is heat-treated with superheated steam, the screw shaft 14 of the screw conveyor 12 is driven to rotate and the superheated steam generation mechanism 22 is operated. In this state, the granular food 16 is introduced into the casing 11 from the introduction pipe 17. The charged granular food 16 travels along the outer peripheral surface of the screw shaft 14 and falls below the heat treatment space 48 and moves forward while being heated by the rotation of the screw blade 15 formed in a spiral shape.

  At this time, as shown in FIG. 6, since the auxiliary stirring blade 20 extends between the screw blades 15 so as to extend in the axial direction of the screw shaft 14, the granular food accumulated in the lower part of the heat treatment space 48. 16 is stirred up by the auxiliary stirring blade 20 as the screw blade 15 rotates.

  As shown in FIG. 5, the auxiliary stirring blade 20 is inclined such that the inner peripheral side is located behind the outer peripheral side in the rotational direction of the screw shaft 14 with respect to the radial direction of the screw shaft 14, and the inclination angle α is Since it is set at 45 degrees, the granular food 16 is likely to be placed on the auxiliary stirring blade 20, and the granular food 16 is effectively scooped up. Further, since the auxiliary stirring blades 20 are provided in eight rows at equal intervals in the circumferential direction of the screw blades 15, the granular foods 16 accumulated in the lower part of the heat treatment space 48 are scooped up one after another, and are granular. The stirring of the food 16 is repeated. Therefore, the stirring of the granular food 16 is efficiently performed intermittently at regular intervals.

  Also, superheated steam or superheated steam and hot air are blown from the plurality of superheated steam supply holes 50 opened in the casing 11 toward the auxiliary stirring blade 20 that is particularly located in the upper part. Therefore, the granular food 16 on the auxiliary stirring blade 20 is blown off by the superheated steam or superheated steam and hot air blown up to the auxiliary stirring blade 20 that reaches the upper part after scooping up the granular food 16 and falls from above the auxiliary stirring blade 20. Then, stirring of the granular food 16 is promoted.

  Further, the superheated steam generated by the superheated steam generation mechanism 22 is transferred from the discharge holes 44 of the end wall 23 provided at intervals of 90 degrees in the circumferential direction of the screw shaft 14 to the heat treatment space 48 via the discharge holes 51. Released. For this reason, the granular food 16 moving forward in the heat treatment space 48 is exposed to superheated steam while being stirred.

  Then, until the surface temperature of the granular food 16 reaches 100 ° C., the superheated steam comes into contact with the granular food 16, the steam condenses on the surface of the granular food 16 while releasing condensation latent heat, and the granular food 16 is rapidly heated. Is done. When the surface temperature of the granular food 16 reaches 100 ° C. or more, the temperature of the granular food 16 further rises after water attached to the surface of the granular food 16 evaporates. Therefore, the granular food 16 is uniformly heat-treated with superheated steam while being stirred to suppress uneven baking, and the quality of the heat-treated granular food 16 can be improved.

The effect exhibited by the above embodiment is described collectively below.
(1) In the granular food heat treatment apparatus 10 using superheated steam of this embodiment, the screw conveyor 12 is rotatably supported in the casing 11, and superheated steam is supplied into the casing 11. The charged granular food 16 is heated with superheated steam. Between the screw blades 15 of the screw conveyor 12, auxiliary stirring blades 20 that assist the stirring of the granular food 16 are installed so as to extend in the axial direction of the screw shaft 14.

  For this reason, the granular food 16 introduced into the casing 11 is forcibly stirred by the auxiliary stirring blade 20 installed between the screw blades 15. Since the forced stirring of the granular food 16 is repeatedly performed by the auxiliary stirring blade 20, the stirring of the granular food 16 is continued effectively. Therefore, the uniformity of the heat treatment for the granular food 16 can be improved, and the quality such as the taste, aroma and appearance of the heat-treated granular food 16 can be improved.

Therefore, according to the heat processing apparatus 10 for granular food of this embodiment, the uniformity of the heat processing of the granular food 16 can be improved, the quality of the heat processing of the granular food 16 can be improved, and the heat processing is performed. Can be performed efficiently.
(2) The auxiliary stirring blade 20 is formed in a plate shape and is installed at the outer peripheral position of the screw blade 15. For this reason, the granular food 16 collected in the lower part of the heat treatment space 48 can be easily scooped up by the auxiliary stirring blade 20, and the stirring efficiency of the granular food 16 can be increased.
(3) The auxiliary stirring blades 20 are inclined and arranged so that the inner peripheral side is located behind the outer peripheral side in the rotational direction of the screw shaft 14 with respect to the radial direction of the screw shaft 14. Therefore, when the auxiliary stirring blade 20 reaches the lower part of the heat treatment space 48, the granular food 16 can be easily placed on the auxiliary stirring blade 20, and the stirring efficiency of the granular food 16 by the auxiliary stirring blade 20 is improved. Can be made.
(4) The auxiliary stirring blades 20 are provided in eight rows at equal intervals in the circumferential direction of the screw blades 15. Therefore, the granular food 16 accumulated in the lower part of the heat treatment space 48 can be scooped up intermittently at regular intervals, and the granular food 16 can be stirred uniformly and satisfactorily.
(5) The screw shaft 14 is formed of a cylindrical body, and a superheated steam generation mechanism 22 is provided in the screw shaft 14, and the superheated steam generated by the superheated steam generation mechanism 22 is supplied to the casing 11 and the screw shaft 14. It is comprised so that it may eject to the heat processing space part 48 between. For this reason, while using the screw shaft 14, the superheated steam production | generation mechanism 22 can be reduced in size, and superheated steam can be smoothly supplied with respect to the granular foodstuff 16 which moves by the screw blade 15 which rotates.
(6) The superheated steam generation mechanism 22 includes three heating tubes 45, 46, 47 in which an electric heater 49 is accommodated in parallel in the screw shaft 14, and three heating tubes 45, 46. , 47 are connected in series, and saturated steam is supplied into the heating tubes 45, 46, 47, and superheated steam is generated while moving in the heating tubes 45, 46, 47. Therefore, by arranging the heating tubes 45, 46, 47 in parallel and connecting them in series, it is possible to efficiently generate superheated steam within the screw shaft 14 of a certain length, and at the same time, A uniform temperature rise can be achieved. As a result, the heat treatment of the granular food 16 can be performed uniformly without unevenness.
(7) The casing 11 is provided with a plurality of superheated steam supply holes 50. Therefore, superheated steam or superheated steam and hot air can be sprayed from the superheated steam supply hole 50 toward the auxiliary stirring blade 20, and the granular food 16 can be stirred more effectively.
(8) In the granular food heat treatment method using the granular food heat treatment apparatus 10, the granular food 16 is introduced into the casing 11, and the granular food 16 is screwed on the screw blades 15 of the screw conveyor 12 in the presence of superheated steam. The granular food 16 is scooped up by the auxiliary stirring blade 20 and heated while being stirred. For this reason, the uniformity of the heat treatment of the granular food 16 can be improved, the quality of the heat treatment of the granular food 16 can be improved, and the heat treatment can be performed efficiently.

It should be noted that the embodiment described above can be modified and embodied as follows.
-You may change inclination-angle (alpha) of the said auxiliary | assistant stirring blade 20 to 50 degree | times, 60 degree | times etc. according to the magnitude | size, shape, etc. of the granular food 16.

-You may form the said auxiliary | assistant stirring blade 20 in cross-sectional arc shape, or may form in cross-sectional square shape.
-You may change suitably the material of the said auxiliary | assistant stirring blade 20, a width | variety, thickness, etc. according to the kind, magnitude | size, shape, etc. of the granular food 16. FIG. Further, the number of auxiliary stirring blades 20 in the circumferential direction of the screw blades 15 may be appropriately changed to 4 rows, 12 rows, or the like.

The auxiliary stirring blade 20 may be further arranged at a constant interval from the auxiliary stirring blade 20 toward the inner peripheral side of the screw blade 15.
-In the superheated steam production | generation mechanism 22, you may comprise the heating pipes 45, 46, 47 by two, or may comprise four or more.

  The superheated steam supply holes 50 opened in the casing 11 may be provided in a plurality of rows in the circumferential direction of the screw shaft 14.

  DESCRIPTION OF SYMBOLS 10 ... Heat processing apparatus for granular foods, 11 ... Casing, 12 ... Screw conveyor, 14 ... Screw shaft, 15 ... Screw blade, 16 ... Granular food, 20 ... Auxiliary stirring blade, 22 ... Superheated steam production | generation mechanism, 45 ... 2nd Heating pipe, 46 ... third heating pipe, 47 ... fourth heating pipe, 48 ... heat treatment space, 49 ... electric heater, 50 ... superheated steam supply hole.

Claims (8)

A heat treatment apparatus for granular food that supports a screw conveyor in a casing rotatably, supplies superheated steam into the casing, and heats the granular food charged in the casing with superheated steam,
The screw conveyor is composed of a screw shaft and screw blades spirally formed on the outer peripheral surface thereof, and auxiliary stirring blades that scoop up the granular food and assist the stirring of the granular food between the screw blades. A heat treatment apparatus for granular foods using superheated steam, which is constructed to extend in a direction. The said auxiliary | assistant stirring blade is formed in plate shape, and is constructed in the outer peripheral position of a screw blade, The heat processing apparatus for granular foods using the superheated steam of Claim 1 characterized by the above-mentioned. 3. The superheated steam according to claim 2, wherein the auxiliary stirring blade is disposed so as to be inclined such that an inner peripheral side thereof is located behind the outer peripheral side in a rotational direction of the screw shaft with respect to a radial direction of the screw shaft. Heat treatment equipment for granular food using The said auxiliary | assistant stirring blade is provided in multiple rows at equal intervals in the circumferential direction of the screw blade, The heat processing apparatus for granular foods using the superheated steam of Claim 2 or Claim 3 characterized by the above-mentioned. The screw shaft is configured by a cylinder, and a superheated steam generation mechanism is provided in the cylinder, and superheated steam generated by the superheated steam generation mechanism is ejected into a heat treatment space between the casing and the screw shaft. It is comprised so that it may be performed. The heat processing apparatus for granular foods using the superheated steam as described in any one of Claims 1-4 characterized by the above-mentioned. In the superheated steam generation mechanism, a plurality of heating tubes containing electric heaters are arranged in parallel in the screw shaft, the plurality of heating tubes are connected in series, and saturated steam is supplied into the heating tube. 6. The granular food heat treatment apparatus using superheated steam according to claim 5, wherein superheated steam is generated while moving in the heating pipe. 7. The superheated steam supply hole for supplying superheated steam or superheated steam and hot air toward the auxiliary stirring blade is opened in the casing. 7. The heat processing apparatus for granular foods using the superheated steam of description. It is the heat processing method for granular foods using the heat processing apparatus for granular foods as described in any one of Claims 1-7,
The granular food is put into the casing, and the granular food is heat-treated while being moved by the screw blades of the screw conveyor in the presence of superheated steam, and the granular food is scooped up by the auxiliary stirring blade and heat-treated while being stirred. A heat treatment method for granular foods using superheated steam.