JP2008182968A - Method for producing small piece of dried fish, and small piece of dried fish - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for producing small pieces of dried fish by which the dried fish maintains delicious taste inherent in the dried fish. <P>SOLUTION: The method for producing small pieces of dried fish includes: spraying steam into a rotary drum 11 charged with small pieces of cut dried fish; sterilizing the small pieces of dried fish through continuously spraying the steam until the temperature in the rotary drum reaches 85°C followed by sucking the steam out of the rotary drum via exhaust means 15 to reduce the pressure in the drum and sending the steam through a steam pipe 12 in the rotary drum to raise the temperature in the rotary drum; starting measurement of the mass of the raw material in the rotary drum; and heating and drying the small pieces of dried fish until the mass reduction ratio thereof reaches a prescribed value. The rotary drum is provided with a jacket part 14 so as to surround the inner part of the steam pipe, and the jacket part is wound with a concave-convex wave board 16 on the side of the axis O of the rotary drum so as to be formed into a partition wall. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

TECHNICAL FIELD The present invention relates to a method for producing a dried fish knot piece obtained by cutting a fish knot into small pieces, and a dried fish knot piece, in particular, for producing a savory dried fish knot piece with reduced oxidation at a reduced processing period and at a low cost. The present invention relates to a method and dried fish slices.

Conventionally, fish slices and powders (hereinafter referred to as small pieces) obtained by cutting dried fish products made from bonito, mackerel, bonito, etc. into small pieces have been manufactured as follows.
(A) After manufacturing the fish clauses, they are cut into small pieces using a cutter or a crusher.
(B) The raw fish is ground or cut and dried to a powder.
The method (A) is a method of steaming a fish salmon washed with water and heating it in a gas oven to dry the fish salmon. The water contained inside is heated to a high temperature, and the action of the high-temperature water softens the fish body itself, making it easier to cut.
The method (B) is carried out as a general simple method as a method for pulverizing fish meat.

Patent Document 1 discloses that a seasoned fish impregnated with a seasoning liquid is cut into a width dimension of 4 mm to 7 mm and a thickness dimension of 20 μm to 50 μm along a direction intersecting the fiber direction of the fish section. Savings are listed. Further, Patent Document 2 describes a method of irradiating a dried fish product such as bonito with infrared rays in a humidified atmosphere.
JP 11-215949 A JP-A-6-237686

In the above conventional production method, when the water content increases, the lipid contained in the crushed fish paste during the production is oxidized or the protein is decomposed, resulting in a problem that the flavor of the fish cake is lowered. It was. In addition, there is a problem that the appearance color is black and the appearance is poor.
Further, there is a problem that the dried product is pulverized by forced stirring with a stirring blade during drying.
Under such circumstances, it has been desired to provide a method for producing a high quality dried fish clause with a reduced processing period.
Accordingly, an object of the present invention is to provide a method for producing a dried fish knot piece and a dried fish knot piece that can retain the original umami taste of the fish knot.

The present invention relates to a method for producing a dried fish knot piece,
Steam is injected into the rotating drum into which the cut fish pieces are put,
After sterilizing the fish pieces by continuing to spray steam until the temperature in the rotating drum reaches 85 ° C.,
While the inside of the rotating drum is sucked by the exhaust means and held at a reduced pressure,
Increasing the temperature in the rotating drum by passing steam through the steam pipe in the rotating drum;
Measurement of the mass of the raw material in the rotating drum is started, and the fish clause pieces are heated and dried until the mass reduction rate reaches a predetermined value.
Further, in the manufacturing method, the rotating drum is provided with a jacket portion so as to surround the steam pipe, and a corrugated plate having irregularities is wound around the axis side of the rotating drum of the jacket portion. It is desirable that the partition wall is formed.
The dried fish clause pieces of the present invention are:
A small piece of dried fish
Steam is injected into the rotating drum into which the cut fish pieces are put,
After sterilizing the fish pieces by continuing to spray steam until the temperature in the rotating drum reaches 85 ° C.,
While the inside of the rotating drum is sucked by the exhaust means and held at a reduced pressure,
Increasing the temperature in the rotating drum by passing steam through the steam pipe in the rotating drum;
It is characterized in that measurement of the mass of the raw material in the rotating drum is started and the fish clause pieces are heated and dried until the mass reduction rate reaches a predetermined value.

According to the method for producing a dried fish knot piece of the present invention, the use of a vacuum heating and drying apparatus incorporating a corrugated plate that can take a wide contact area with the raw material can increase the heat transfer efficiency, and the fish knot piece Can be efficiently dried in a short time not only from the surface layer but also from the inside.
Further, since no stirring blade is used, the dried pieces can be prevented from being finely pulverized, and dried fish knot pieces of a predetermined size can be obtained.
Furthermore, when using such a vacuum heating and drying apparatus, it becomes possible to stir, heat and dry the fish knot pieces in a vacuum state, so that high quality dried fish knot pieces with reduced oxidation can be obtained, and flavor and It is possible to reliably obtain dried fish knot pieces with color.
Furthermore, the dried fish knot pieces of the present invention can be appropriately processed depending on the application. For example, when used for dashi removal, a dried fish knot piece is made of a water-resistant sachet (for example, a tea bag) made of a heat-resistant material such as paper of about several centimeters × several centimeters or a nonwoven fabric. Or can be processed for sprinkling with a mixture of dried fish balls.
In addition, the dried fish cake pieces of the present invention have a good extractability, so that they can be used for soup stock removal, as well as for soup by pouring hot water in a nylon tea triangle teabag, etc. It can be used for authentic miso soup.
Furthermore, the dried fish clause pieces of the present invention can be used in combination with kelp or shiitake mushrooms and packed in tea bags or the like as desired.
The method of the present invention can also be applied to the production of dried bonito small pieces, dried bonito small pieces made from ginger and dried “miscellaneous” pieces made from ginger. Examples of the knots used in the present invention include fish knots, and specific examples include kushi kushi, soda kushi, mackerel knots, sardine knots, tuna knots, kaki kushi, urume knots, boiled sardines and the like.

One embodiment of the method for producing a dried fish slice piece of the present invention will be described below.
[A] The raw fish ginger is washed with water to remove the head, belly, internal organs, and dorsal fin, and lowered to three.
[B] A piece of meat with a moisture content of about 70% is placed in a cooking basket and boiled.
[C] After cooking, the cooking basket is taken out from the cooking pot and the cooked meat is allowed to cool.
[D] The meat pieces are soaked in the sap.
[E] It has a pre-process of completing a rounded section.
Furthermore, as a post process,
[F] The rounded joint is cut or crushed into a size of about 5 to 10 mm in diameter to obtain a fish joint piece. As the cutting or pulverizing means, a known cutting machine or pulverizer is used.
[G] This small piece is put into a rotary drum (heat drying furnace) of a vacuum heat drying apparatus, and heat drying is performed in a furnace from which oxygen is removed.

In vacuum heating and drying equipment, a small drum with high moisture content is put in the rotating drum and sealed, and the rotating drum is heated by a heat medium such as steam injected into the jacket and sucked with a vacuum pump to reduce the pressure inside the rotating drum. To.
Then, the rotary drum is rotated around the axis and the knot pieces are heated and dried while stirring.
The bonito pieces are moved up by the rotating drum, dropped, and uniformly dried by heating.
At this time, the knot piece is lifted and dropped in a state of being in contact with the corrugated plate surface formed on the inner surface of the jacket portion of the rotating drum, so that the heat transfer efficiency to the knot piece can be improved. Efficient stirring.

Furthermore, the following steps follow.
[H] Sterilize knot pieces by spraying heated steam into the furnace. The spraying of heated steam is continued until the temperature in the furnace reaches 85 ° C. Furthermore, even if the furnace temperature reaches 85 ° C., the injection of the heated steam is stopped after continuing the injection for 10 minutes.
This is because if the temperature in the furnace is less than 85 ° C. and less than 10 minutes, the effect of sterilizing small knot pieces is not sufficient.
[I] After completion of the sterilization step, the air in the furnace is sucked from the suction port by a vacuum pump, and the inside of the furnace is kept at a reduced pressure. The holding time is preferably 90 to 120 minutes with the furnace pressure = -0.01 Mpa to -0.5 Mpa.
This is because if the furnace pressure is less than -0.01 Mpa, the oxidation of the knot small pieces during heating and drying is not sufficiently suppressed, and decompression in which the furnace pressure exceeds -0.5 Mpa is not economical.
This is because if the holding time is less than 90 minutes, the dried knot pieces are not sufficiently dried by heat, and the holding time exceeding 120 minutes is not economical.
[J] At the same time, steam is passed through the steam pipe in the furnace to raise the furnace temperature and maintain it at 80 to 85 ° C. Since the pressure inside the furnace is reduced, the water in the raw material becomes water vapor and evaporates. The steam is discharged out of the furnace together with the discharged air, cooled and liquefied in the receiver tank outside the furnace, and discharged as water.
When the temperature in the furnace is less than 80 ° C., the dried koji pieces are not sufficiently dried,
This is because long-time heating and drying exceeding 85 ° C. may cause oxidation of the knot pieces.
[K] When the evaporation of the moisture contained in the knot small piece proceeds, the mass reduction rate of the raw material (knot small piece) becomes converged. That is, the mass of the entire furnace (rotary drum) is weighed at regular time intervals, and the point at which this mass reduction rate approaches a certain rate is defined as the end point of drying.
[L] Stop the heating steam, and instead pass cooling water through the steam pipe to lower the furnace temperature. [M] When the furnace temperature reaches room temperature, the rotation of the rotary drum is stopped, the pressure in the furnace is returned to atmospheric pressure, the furnace lid is opened, and the dried bonito pieces dried from the furnace are taken out into the hopper. .

Further, the mass of the rotating drum is measured at a predetermined time interval, the mass reduction rate of the knot small piece raw material is calculated every moment, and the drying process is terminated when the moisture content of the raw material becomes a certain value or less.
In addition, since the corrugated sheet for promoting heat transfer and stirring is provided in the furnace of the vacuum heating / drying apparatus to directly contact the raw material, an internal stirring apparatus such as a screw can be omitted, and the heat-dried bonito piece Will not be broken and pulverized.

Next, an apparatus for producing the dried knot pieces of the present invention will be described.
1 to 3 show an apparatus used for manufacturing dried knot pieces according to an embodiment of the present invention, and an example of a vacuum heating and drying apparatus for obtaining dried knot pieces by vacuum heating drying knot pieces as a raw material. It is.
1 is a front view of a vacuum heating and drying apparatus, FIG. 2 is a plan view, and FIG. 3 is a side view. FIG. 4 is an internal cross-sectional view of a rotating drum constituting the vacuum heating and drying apparatus.

As shown in FIGS. 1 to 4, the vacuum heating and drying apparatus 10 accommodates raw materials and heats the inside of the rotating drum 11 and a horizontal cylindrical rotating drum 11 that is rotatably supported around an axis O. A heating means 12 such as a steam pipe and an exhaust means 15 for exhausting the inside of the rotating drum 11 to reduce the pressure are provided, and the inside of the rotating drum 11 is filled while rotating the rotating drum 11 around its axis O. The dried raw material is heated and dried in a reduced pressure atmosphere.

The rotating drum 11 is formed in a cylindrical shape from, for example, steel, stainless steel, or a heat-resistant alloy as required, for example, molybdenum, tantalum, or tungsten, or a molybdenum alloy containing titanium and zirconium, and its axis O is in the horizontal direction. It is set as the horizontal structure arrange | positioned sideways so that it may become.
In addition, the cylindrical portion of the rotating drum 11 is provided with a charging port 11 c that is used for charging and discharging the raw material inside the rotating drum 11.
A steam pipe 12 is coaxially disposed through both ends of the rotating drum 11 so as to extend outward in the axis O direction at both ends in the axis O direction. .

In the front view of FIG. 1, a steam branching portion 11 e that is a branch circuit for supplying steam to a plurality of steam pipes 12 in the rotating drum 11 is provided on the right end surface 11 g of the rotating drum 11. The distal end of the pipe 12 is connected to the steam branching part 11e, and the base end of the steam branching part 11e is connected to a boiler (not shown).
The heated steam supplied from the boiler is distributed and transferred to the plurality of steam pipes 12 in the jacket part 14 in the rotating drum 11 through the steam branching part 11e.
Further, the steam branching portion 11e is connected to a sterilization steam outlet 11f that directly jets steam into the rotary drum 11, and high temperature steam can be injected from the sterilization steam outlet 11f to the raw material. Yes.

As shown in the cross-sectional view of FIG. 4, the outer peripheral wall 13 of the rotary drum 11 has a double structure, and a jacket portion 14 is provided so as to surround the pipe through which steam passes.
A corrugated plate 16 having irregularities is wound around the axis O side of the rotating drum of the jacket portion 14 to form a partition wall.
Although the size of the unevenness is not particularly defined, as an example, it is preferable that the interval between the convex portions is 30 to 60 mm pitch and the height of the valley is about 10 to 30 mm.
This corrugated plate 16 also serves as a stirring means formed inside the rotary drum 11,
The raw material sinking in the concave portion of the corrugated plate is lifted upward along with the rotation of the drum, and dropped to the lower side and stirred. At this time, since the raw material is in direct contact with the curved surface of the corrugated plate, the raw material is gently stirred, and the cutting action like a stirring blade does not work and the powder is not pulverized.
The corrugated plate 16 is made of, for example, a stainless alloy plate.

Circular rails 17 are wound around both ends of the outer peripheral wall 13 of the rotating drum 11 so as to circulate in the circumferential direction of the rotating drum 11.
A base 18 is provided below the rotary drum 11.
A flanged wheel 19 is rotatably supported on the upper surface of the base 18 at a position separated in the axial direction of the rotary drum 11, and the circular rail 17 is fitted in the groove of the flanged wheel 19.
The rotating drum 11 is supported on the base 18 by the circular rail 17 and the flanged wheel 19 so as to be rotatable and immovable in the axial direction of the rotating drum 11.

The flanged wheel 19 is connected to a motor with a transmission, which is a drive source fixed in the base 18, and controls the rotation direction and the rotation speed of the rotary drum 11 by controlling the motor with the transmission. Can be done.
The rotating drum 11 is connected to a weighing means 20 such as a scale for measuring the mass of the rotating drum 11 via a flanged wheel 19.

In the front view of FIG. 1, a suction port 11 b is provided on the left end surface 11 a of the rotary drum 11.
An intake pipe 15a connected to an exhaust means 15 such as a vacuum pump is connected to the suction port 11b so that the inside of the rotary drum 11 can be exhausted.
The intake pipe 15a is directly connected to the left end surface 11a from the outside coaxially with the axis O of the rotating drum 11, and is configured to rotate together with the rotating drum 11 when the rotating drum 11 rotates around the axis O. Has been.
Further, a filter or the like (not shown) is disposed at the suction port 11b of the rotating drum 11, so that when the inside of the rotating drum 11 is exhausted by the exhaust means 15, the raw material inside the rotating drum 11 is not discharged. It has become.
Examples of the exhaust means 15 include a rotary pump and a mechanical pump.

With the above apparatus configuration, when the air inside the rotary drum 11 is exhausted from the exhaust means 15 via the intake pipe 15a, the moisture contained in the raw material heated by the heating means 12 such as a steam pipe is also exhausted. can do.

Further, the cylindrical wall of the rotary drum 11 is provided with a charging port 11c through which knot pieces are taken in and out, and a furnace lid 11d for closing the charging port 11c is provided.
Note that the outer diameter of the rotating drum 11 is about 1100 mm and the length in the direction of the axis O is about 1000 mm, and the rotating drum 11 can be filled with about 100 kg of raw material at a time. It can be rotated at about 0.1 rpm to 10 rpm.

A method for heating and drying the raw material by the vacuum heating rotary furnace 10 configured as described above will be described in detail.
First, the small knot pieces obtained by cutting the above-described round nodes into a diameter of about 5 to 10 mm are put into the rotary drum 11 from the charging port 11c, and then the charging port 11c is closed with the furnace lid 11d.
Then, the rotating drum 11 is rotated around its axis O by a transmission-equipped motor that is a driving source, and stirring of the raw material filled in the rotating drum 11 is started.

Next, sterilization is started by injecting high temperature steam at about 85 ° C. into the raw material from the sterilization steam outlet 11f, and the heating steam is continuously injected until the temperature of the rotating drum 11 reaches 85 ° C.
And even if the in-furnace temperature reaches 85 ° C., after continuing the injection for 10 minutes, the in-furnace injection of the heated steam is stopped.
After completion of the sterilization process, the air in the rotary drum 11 is sucked from the suction port 11b by the exhaust means 15, and the inside of the furnace is kept at a reduced pressure. The holding time is preferably 90 to 120 minutes, with the furnace pressure = -0.01 Mpa to -0.5 Mpa.
At the same time, steam is passed through the steam pipe 12 in the rotating drum 11 to raise the furnace temperature to 80 ° C., and the moisture in the raw material is discharged out of the furnace together with air.
Then, after 90 to 120 minutes have passed since the inside of the furnace was held at a reduced pressure, the mass reduction rate of the raw material approached the convergence state, and this mass reduction rate reached a constant rate by the weighing means 20 previously set at a predetermined value. Let the alarm device, such as a buzzer,
Stop the transfer of steam to the steam pipe in the furnace, and instead pass cooling water to lower the furnace temperature. Further, when the furnace temperature reaches room temperature, the rotation of the rotary drum 11 is stopped, the furnace pressure is returned to atmospheric pressure, the furnace lid 11d is opened, and the dried knot small pieces are taken out from the furnace into the hopper 21.

As described above, according to the method for manufacturing the dried knot pieces according to this embodiment,
Without increasing the cost of the apparatus and lowering the handleability, it is possible to produce dried dried knot pieces by reducing the pressure inside the rotating drum 11 while rotating it.

Furthermore, using such a vacuum heating and drying apparatus 10 makes it possible to stir, heat, and dry the raw material in a vacuum state, so that a high-quality dried bonito piece is obtained, and the flavor and color tone with suppressed oxidation are obtained. The provided dry bonito piece can be obtained reliably.

In addition, this invention is not limited to the said embodiment, A various change can be added in the range which does not deviate from the meaning of this invention.
For example, although the horizontal structure is shown as the vacuum heating and drying apparatus, a vertical structure vacuum heating and drying apparatus may be adopted instead.

Using the above-described apparatus, a method for producing a dried knot piece will be described in more detail in Examples, but the present invention is not limited to such examples.
First, 15 ginger of approximately 5.5 kg per animal is dropped into three pieces, and each piece of meat is placed in a boiled basket and boiled for 100 minutes at 90-95 ° C in a boiled pot by indirect heating with steam. Ripe.
After cooking, remove the cooking basket from the cooking pot, let it cool, and prepare the bones from each piece of meat while floating the cooked meat in the water in the tub. Was soaked for 1 hour, and then drained, and this was dipped in a cocoon solution diluted with water 100 times with water for 1 hour to produce marinade.
Next, the round knot was pulverized into about 8 mm square, and 100 kg of the kneaded knot was used as a koji small piece raw material.
Thereafter, steam at 85 ° C. was ejected from the steam outlet for sterilization into the rotating drum, and the ejection continued for another 10 minutes after the interior of the drum reached 85 ° C.
Next, the inside of the drum was started to be sucked from the suction port, and at the same time, the steam was passed through the steam pipe.
During this time, the temperature in the drum was maintained at 80 ° C. while maintaining the internal pressure of the drum at −0.076 Mpa.
The drum rotation speed is set to 3r. p. m. And processed for 1.5 hours to produce dried knot pieces.

According to the method for producing a dried fish knot piece of the present invention, the use of a vacuum heating and drying apparatus incorporating a corrugated plate that can take a wide contact area with the raw material can increase the heat transfer efficiency, and the fish knot piece Can be efficiently dried.
Further, since no stirring blade is used, the dried fish knot pieces can be prevented from being finely pulverized, and the dried fish knot pieces having the same size can be obtained.
Furthermore, when such a vacuum heating and drying apparatus is used, it becomes possible to stir, heat and dry the raw material in a vacuum state, so that a high-quality dried piece is obtained, and it has a flavor and color with suppressed oxidation. The product can be obtained reliably.
Furthermore, the dried fish knot pieces of the present invention can be appropriately processed depending on the application. For example, when used for dashi removal, the dried small pieces can be filled into small bags or processed for sprinkling mixed with the dried small pieces.

It is a front view of the vacuum heating drying apparatus used for the embodiment of the present invention. It is a top view of the vacuum heating drying apparatus used for the embodiment of the present invention. It is a side view of the vacuum heating drying apparatus used for the embodiment of the present invention. It is an internal sectional view of a rotating drum used in an embodiment of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Vacuum heating dryer 11 Rotary drum 11a Left end surface 11b Suction port 11c Input port 11d Furnace lid 11e Steam branching part 11f Sterilization steam outlet 11g Right end surface 12 Heating means (steam tube)
13 Outer wall 14 Jacket portion 15 Exhaust means 15a Intake pipe 16 Corrugated plate (stirring means)
17 circular rail 18 base 19 wheel with flange 20 weighing means 21 hopper O axis

Claims (3)

A method for producing a dried fish slice,
Steam is injected into the rotating drum into which the cut fish pieces are put,
After sterilizing the fish pieces by continuing to spray steam until the temperature in the rotating drum reaches 85 ° C.,
While the inside of the rotating drum is sucked by the exhaust means and held at a reduced pressure,
Increasing the temperature in the rotating drum by passing steam through the steam pipe in the rotating drum;
A method for producing a dried fish knot piece, characterized in that measurement of the mass of the raw material in the rotating drum is started and the fish knot piece is heated and dried until the mass reduction rate reaches a predetermined value. The rotating drum is provided with a jacket portion so as to surround the steam pipe, and a corrugated plate having irregularities is wound around the axis of the rotating drum of the jacket portion to form a partition wall. The method for producing a dried fish knot piece according to claim 1. A small piece of dried fish
Steam is injected into the rotating drum into which the cut fish pieces are put,
After sterilizing the fish pieces by continuing to spray steam until the temperature in the rotating drum reaches 85 ° C.,
While the inside of the rotating drum is sucked by the exhaust means and held at a reduced pressure,
Increasing the temperature in the rotating drum by passing steam through the steam pipe in the rotating drum;
A dried fish knot piece obtained by starting to measure the mass of the raw material in the rotating drum and heating and drying the fish knot piece until the mass reduction rate reaches a predetermined value.

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