JP5325182B2 - Soy milk heating device for tofu production and method for producing tofu - Google Patents

Description

  The present invention relates to a soy milk heating apparatus used in the production process of tofu, and in particular, a soy milk heating apparatus that enables mass production of Okinawa-like tofu having a fragrant burnt flavor, and tofu production using the apparatus. On how to do.

  There are two methods for producing tofu: the “boiled chicken method” and the “raw squeeze method”. The stew method is to heat koji soup (soaked in water and softened and then ground), then perform a filtration process to remove “okara” and obtain soy milk. In the squeezing method, soy milk (raw soy milk) obtained by filtering the soup is heated.

  In Okinawa, tofu has been produced by the raw squeezing method for a long time, and the soy milk heating process (heat treatment) is still carried out by the traditional method of heating the pot with soy milk over an open flame. There are many cases. According to this traditional method, a savory burnt flavor is added to the soy milk in the heating step, and the unique flavor remains in the tofu after production. On the other hand, when tofu is produced by the boiled method, since the filtration step is performed after the heating step, the burnt flavor hardly remains.

Japanese Patent Laid-Open No. 10-323166

  In order to produce a tofu with an Okinawan flavor, it is necessary to carry out the raw squeezing method and the heating process using the traditional method of heating the pot with soy milk over an open flame. However, in this case, there is a problem that mass production is difficult. Specifically, when a ground pot is used in the heating process, it is a so-called batch method. For mass production, a large number of ground pots are used at the same time, or a large number of ground pots are placed with a time difference. In this case, temperature control becomes very difficult, and it is difficult to stabilize the quality.

  The present invention has been made to solve the above problems, and tofu having a fragrant flavor similar to that of tofu produced using a ground pot and direct fire is continuously used without using the ground pot. An object of the present invention is to provide a method for producing a large amount of the product and a soy milk heating device for the method.

  A soymilk heating apparatus according to the present invention includes a heating tank formed in a bowl shape, heating means for heating the bottom surface of the heating tank, and a scraper configured so that a large number of blades circulate on a track around a horizontal axis. The scraper is configured in such a manner that the blades orbiting the lower side of the track are partitioned so as to divide the internal space of the heating tank in the longitudinal direction, and the edge on the tip side is heated in the heating tank. The scorch recovery device is configured to continuously move from the start end side to the end end side of the heating tank in a state where it is in contact with the bottom surface of the heating tank. And the soy milk in the heating tank is supported so as to be partially submerged in the soy milk in the heating tank, and the burnt rice cake scorched off from the bottom surface of the heating tank by the edge of the tip of the blade is captured. Configured to be withdrawn from inside and collected It is characterized in that.

  Note that the scraper blades are preferably configured to contact the bottom surface of the heating tank in a state in which the edge on the distal end side is inclined rearward in the traveling direction with respect to the edge portion on the proximal end side. A step portion lower than the reference surface is formed in a portion of the bottom surface of the tank where the scorch recovery device is disposed, and the endless filter of the scorch recovery device is arranged along the step portion in the heating tank. Thus, it is preferable that the heating tank is configured to pass through a position lower than the reference surface on the bottom surface.

  In addition, the method for producing soymilk according to the present invention continuously supplies the soymilk obtained by filtering the soup to the soymilk heating device, and heat-treats the scorch at the bottom of the heating tank, After scorching the burnt rice cake generated at the bottom of the heating tank with a scraper and collecting it with a charcoal rice cake collecting device, the heat-treated soy milk is discharged from the soy milk heating device, and the filter device is used for heat treatment. It is characterized by performing a coagulation step after removing the fine burnt residue from soy milk.

  The soy milk heating apparatus according to the present invention heats the soy milk in the heating tank by supplying the raw soy milk continuously and quantitatively in the heating tank while heating the heating tank to such an extent that the bottom surface is burnt. The soy milk after the heat treatment can be discharged continuously and quantitatively, and the scorch generated by the heat treatment is scalded from the bottom of the heating tank by the scraper and the soy milk in the soy milk by the scorch soot recovery device. As a result, the tofu with a fragrant flavor similar to the tofu produced using a local pot and direct fire can be collected in large quantities continuously without using the local pot. It can be manufactured.

  In addition, the scorch attached to the bottom surface can be scalded by adjusting the amount at an appropriate timing and so that the scoring level does not exceed the limit, and the scoring degree is suitably controlled and moderate. Flavored tofu can be produced with stable quality.

FIG. 1 is a side cross-sectional view of a soymilk heating device 1 (first embodiment) according to the present invention. FIG. 2 is a perspective view of the scraper 4 shown in FIG. FIG. 3 is a perspective view of the main part of the scorch recovery apparatus 5 shown in FIG. 1 and the heating tank 2 (part near the scorch recovery apparatus 5). FIG. 4 is a perspective view showing a cross-section of the main part of the scorch recovery device 5 shown in FIG. 3 and the heating tank 2 (site near the scorch recovery device 5). FIG. 5 is a perspective view showing a cross-section of the main part of the burnt spout recovery apparatus 5 shown in FIG. 3 and a cross-section of the heating tank 2 (a part in the vicinity of the scorch recovery apparatus 5).

  Hereinafter, embodiments of the “soy milk heating device” of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a side cross-sectional view of a soymilk heating device 1 (first embodiment) according to the present invention. This soymilk heating device 1 is basically composed of a heating tank 2, a heating means (burner 3), a scraper 4, and a charred salmon recovery device 5.

  The heating tank 2 is made of stainless steel and is formed in an elongated bowl shape (inner dimensions: length 5 m, width 500 mm, depth 150 mm), and can store 350 L or more of soy milk at a time. In addition, a discharge port 2c having a valve is formed at the end portion 2b (the right end portion in FIG. 1) of the heating tank 2.

  A burner 3 is disposed below the heating tank 2. The burner 3 is composed of a gas pipe 3a and a plurality of nozzles 3b. The nozzle 3b has a predetermined interval in the longitudinal direction of the heating tank 2 (left and right direction in FIG. 1) as shown in the figure. In addition to the arrangement, a plurality of arrangements are also arranged at predetermined intervals in the width direction of the heating tank 2.

  The scraper 4 includes a pair of rollers 6a and 6b, an endless belt 7 stretched between them, a large number of blades 8 attached to the outer surface of the endless belt 7, and a motor (not shown). . Among these, the rollers 6a and 6b are supported in a state that they can rotate slightly above the upper edge of the heating tank 2, and receive a driving force of the motor in a predetermined direction (counterclockwise direction in FIG. 1). It is configured to rotate to. As shown in the figure, one roller 6 a is disposed at a position near the starting end 2 a of the heating tank 2, and the other roller 6 b is disposed at a position near the terminal end 2 b of the heating tank 2.

  As shown in FIG. 2, each of the blades 8 is formed in a rectangular plate shape, and the lateral width is set to be approximately equal to the lateral width inside the heating tank 2. Further, the blade 8 is attached to the endless belt 7 in such a direction that the edge 8a on the base end side coincides with the transverse direction of the endless belt 7 (direction orthogonal to the longitudinal direction of the heating tank 2), and the horizontal axis (roller 6a , 6b axis) around the track. In addition, the space | interval of adjacent blade | wings 8 is set uniformly (all are 300 mm).

  The scraper 4 has a predetermined height position (the lower side of the endless belt 7 is placed in the soy milk introduced into the heating tank 2 in a direction in which the length direction of the endless belt 7 coincides with the length direction of the heating tank 2. The edge 8b on the tip side of the blade 8 that is not submerged and is attached to the lower side of the endless belt 7 is supported at a height position in contact with the bottom surface 2f of the heating tank 2.

  As shown in FIG. 3, the scorch recovery device 5 includes four rollers 9 a to 9 d, an endless filter 10 stretched outside these rollers, a guide roller 12, and a motor (not shown). . Among these, the endless filter 10 is formed by forming a mesh-shaped material having a coarse mesh into a band shape with a constant width (about 300 mm) and connecting the both ends in the longitudinal direction to form an annular shape (endless shape). Is.

  The rollers 9a and 9d are supported so as to be rotatable slightly above the upper edge of the heating tank 2, and are configured to rotate in a predetermined direction by receiving the driving force of the motor. The rollers 9b and 9c are supported in a rotatable state slightly below the lower edge of the heating tank 2. The endless filter 10 passes from the upper side of the heating tank 2 through the right side, lower side, and left side of the heating tank 2 and again to the upper side of the heating tank 2 around the horizontal axis (the axes of the rollers 9a to 9d). It is stretched outside the rollers 9a to 9d so as to go around.

  In addition, in most parts of the heating tank 2, the width dimension is constant (500 mm) and the depth dimension is also constant (150 mm). However, in the part where the scorch recovery device 5 is arranged. As shown in FIG. 3, the extension 2d and 2e projecting in the left-right direction are formed, so that the width dimension is partially increased. The endless filter 10 is stretched so as to pass outside these extensions 2d and 2e.

  The endless filter 10 is supported so as to be partially submerged in the soymilk in the heating tank 2. More specifically, in the portion of the bottom surface 2f of the heating tank 2 where the scorch recovery device 5 is disposed (extensions 2d and 2e and intermediate portions thereof), the normal bottom surface 2f of the heating tank 2 ( A step portion 2g lower than the bottom surface (reference surface) other than the portion where the scorch recovery device 5 is disposed is formed (see FIGS. 1, 4, and 5). The intermediate portion of the portion stretched between the rollers 9a and 9d (the roller positioned above the heating tank 2) is pushed down by the guide roller 12 as shown in FIGS. It passes along the level | step-difference part 2g in 2, and is comprised so that it may pass through a position lower than the normal bottom face 2f (reference plane) of the heating tank 2. FIG.

  The soymilk heating apparatus 1 according to the present embodiment has the above-described configuration. While the raw soymilk is continuously and quantitatively supplied into the heating tank 2 from the supply port 11 shown in FIG. The bottom surface 2f of the heating tank 2 is heated by the burner 3 to such an extent that it will be burnt in the cooking tank 2, so that the soy milk in the heating tank 2 is heated, and the soy milk after the heating process is continuously and quantitatively measured from the outlet 2c. Can be discharged. Then, the scorch caused by the heat treatment can be scalded from the bottom surface 2f of the heating tank 2 by the scraper 4, and the scorch soak can be automatically recovered from the soymilk by the scorch recovery device 5, as a result. In addition, it becomes possible to continuously produce a large amount of tofu having a fragrant flavor similar to that of tofu produced using an open flame without using a ground pot.

  More specifically, as described above, the scraper 4 is supported at a height position where the edge 8b on the tip end side of the blade 8 is in contact with the bottom surface 2f of the heating tank 2, and the width of the blade 8 is as follows. Therefore, the inner space of the heating tank 2 (the lower part of the endless belt 7) is divided in the longitudinal direction by the blades 8 adjacent to the longitudinal direction of the heating tank 2. It is in a state of being partitioned to do. When the motor is driven to rotate the rollers 6 a and 6 b in a predetermined direction (counterclockwise direction in FIG. 1), the endless belt 7 rotates in the same direction, and the blades 8 attached to the outside of the endless belt 7. Circulates on the track, and on the lower side of the endless belt 7, the blade 8 that circulates on the lower side of the track is partitioned so as to divide the internal space of the heating tank 2 in the longitudinal direction. It moves continuously from the terminal part 2b side.

  For this reason, the raw soy milk supplied into the heating tank 2 from the supply port 11 disposed in the vicinity of the starting end 2a of the heating tank 2 is moved through the heating tank 2 toward the end portion 2b by the blades 8 of the scraper 4. Will be transported. The blade 8 is set so as to advance at a speed of 200 mm per minute, and the soy milk moves slowly while being heated by the burner 3. And the soy milk which reached | attained the terminal part 2b of the heating tank 2 is discharged | emitted from the discharge port 2c in the state to which sufficient heat processing was performed.

  Thus, if the soymilk heating apparatus 1 of this embodiment is used, the raw soymilk heat treatment (previously performed in a batch system) can be performed continuously and quantitatively. In addition, when the heat processing by the direct fire using the burner 3 is performed, the part heated by the burner 3 among the bottom face 2f of the heating tank 2 will arise. This scorch is a unique flavor in tofu produced by the raw squeezing method, and it is an essential factor for producing a tofu with a savory flavor of Okinawa, but heat treatment is carried out while leaving this scorch undisturbed. If it continues, accumulation, increase, the degree of scoring will exceed the limit, and the result will be the production of tofu with a burnt smell. In other words, when performing the heat treatment continuously, it is necessary to control the degree of scoring in order to keep the quality constant.

  In the present embodiment, the edge 8b on the tip side of the blade 8 of the scraper 4 is configured to move in contact with the bottom surface 2f of the heating tank 2 where scorching occurs. It is designed to be bald at a fixed timing. In consideration of the temperature of the bottom surface 2f to be heated and the degree of scoring, the traveling speed and pitch (interval) of the blades 8 are set so that scorching can be removed at an appropriate timing. Since it is set, tofu with a moderate flavor can be produced with stable quality.

  In addition, in the present embodiment, the degree of scoring exceeds the limit if the scorching of the bottom surface 2f is completely scorched off by the edge 8b on the front end side of the blade 8, because sufficient flavor cannot be obtained. A state where the blade 8 is laid backward in the traveling direction so that the scorching can be lightly scalded to the extent (the edge 8b on the distal end side is rearward in the traveling direction with respect to the edge portion 8a on the proximal end side). It is in contact with the bottom surface 2f in an inclined state).

  The burnt rice cake boiled off by the edge 8b on the tip end side of the blade 8 has a specific gravity greater than that of soy milk, and therefore stays in the vicinity of the bottom surface 2f of the heating tank 2, and the end portion of the heating tank 2 by the blade 8 of the scraper 4 It will be transferred toward 2b. Further, as shown in FIG. 1, a scorch recovery device 5 is disposed on the front side of the end portion 2 b of the heating tank 2, and the scorched scalp transported along the bottom surface 2 f of the heating tank 2 is It is collected by the soot collecting device 5.

  More specifically, as described above, the scorch recovery device 5 is configured so that the intermediate portion of the endless filter 10 that is stretched between the rollers 9a and 9d is pushed downward by the guide roller 12 and is Since 10 a is configured to pass through a position lower than the normal bottom surface 2 f of the heating tank 2, the scorched rice cake transferred to the scorch recovery device 5 by the scraper 4 is endless from the bottom surface 2 f of the heating tank 2. Will be swept out onto the filter 10 and captured at the upper surface 10a.

  The chard salmon recovery device 5 is set to always operate while the soymilk heating device 1 is performing the heat treatment. Accordingly, the rollers 9a and 9d are rotated in a predetermined direction by receiving the driving force of the motor, and the endless filter 10 stretched outside thereof is always rotated in the same direction. For this reason, the burnt trough captured by the endless filter 10 is lifted from the soy milk in the heating tank 2.

  Further, in this charcoal recovery device 5, when the endless filter 10 passes outside the heating tank 2, the scorch trapped by the removal means (air blow device, brush device, etc.) (not shown) is captured by the endless filter 10. It is configured to be removed from the surface, dropped into a collection box (not shown), and collected.

  On the other hand, the heat-treated soy milk discharged from the soy milk heating device 1 is transported for the next step (coagulation, mold filling, moisture removal), but can be recovered by the charred salmon recovery device 5. Since there is a possibility that fine burnt residue that has not been mixed in, it is preferable to remove the fine burnt residue by applying soy milk to a simple filter device (fine dust removing device) before the coagulation step.

  In the present embodiment, a burner 3 (gas burner) including a gas pipe 3a and a nozzle 3b is used as a means for heating the heating tank 2, but the heating means is limited to the gas burner. Any means (for example, electric heater, IH, kerosene burner) can be used as long as the bottom surface 2f of the heating tank 2 can be heated and the bottom surface 2f can cause the soy milk to burn. , Charcoal, firewood, etc.) can also be used.

1: Soy milk heating device,
2: heating tank,
2a: start end,
2b: terminal part,
2c: outlet,
2d, 2e: extensions,
2f: bottom surface
2g: step portion,
3: Burner,
3a: gas pipe,
3b: nozzle,
4: Scraper,
5: Burnt salmon recovery device,
6a, 6b: roller,
7: Endless belt,
8: Feather,
8a: base end side edge,
8b: tip side edge,
9a to 9d: roller,
10: endless filter,
10a: top surface,
11: Supply port,
12: Guide roller

Claims (4)

A heating tank formed in a bowl shape, heating means for heating the bottom surface of the heating tank, a scraper configured so that a large number of blades circulate on a track around a horizontal axis, and a scorch recovery device And
The scraper is in a state in which blades orbiting the lower side of the track are partitioned so as to divide the internal space of the heating tank in the longitudinal direction, and the edge on the tip side is brought into contact with the bottom surface of the heating tank. In a state, the heating tank is configured to continuously move from the start end side to the end end side,
The scorched salmon recovery device is supported so that the endless filter circulates on a trajectory around a horizontal axis and is partially submerged in the soy milk in the heating tank. A soy milk heating apparatus configured to capture the burnt rice cake that has been scooped off from the bottom surface of the heating tank by an edge, and to lift and collect it from the soy milk in the heating tank.   The blade is configured to come into contact with the bottom surface of the heating tank in a state in which the edge on the distal end side is inclined rearward in the traveling direction with respect to the edge portion on the proximal end side. Item 2. The soybean milk heating device according to Item 1. Of the bottom surface of the heating tank, a step portion lower than a reference surface is formed in the portion where the burnt soot collection device is arranged,
The endless filter of the scorch recovery device is configured to pass through a position lower than a reference surface of the bottom surface of the heating tank along the stepped portion in the heating tank. The soymilk heating device according to claim 1. A method for producing tofu using the soymilk heating device according to any one of claims 1 to 3,
The soy milk obtained by filtering the soup is continuously supplied to the soy milk heating device, and heat-treated to the extent that scorching occurs at the bottom of the heating tank,
While scoring off the burnt rice cake generated on the bottom surface of the heating tank during the heat treatment with the scraper, and collecting the burnt rice cake recovery device, discharge the heat-treated soy milk from the soy milk heating device,
A method for producing tofu characterized by performing a coagulation step after removing fine burnt wrinkles from the heat-treated soy milk by a filter device.

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