JPH10286178A - Heat processor for drink and food material or the like - Google Patents

Abstract

PROBLEM TO BE SOLVED: To appropriately control the transpiration of the contained moisture of a drink and food material and to perform a heating processing at a desired temperature by connecting the send-out port of the steam generation tank of a high humidity hot air generation furnace to a jetting port disposed inside the horizontal type rotary barrel of a heat processor for heat-processing tea leaves or the like to be processed and jetting high humidity hot air. SOLUTION: The feeding port 12 of material tea leaves is formed at one end of the horizontal type rotary barrel 1, a take-out port 13 is formed at the other end and a guiding projection line 14 is helically attached from the feeding port 12 to the take-out port 13 on an inner wall surface. At the time of feeding the tea leaves to be processed from the feeding port 12 while rotating the horizontal type rotary barrel 1, the tea leaves are moved to the take-out port 13 while being repeatedly scooped up and dropped. Also, at the time, by jetting the high humidity hot air whose humidity is 60-90% and temperature is 200-390 deg.C from the high humidity hot air generation furnace 2 composed of the steam generation tank 21 and a burner 22 connected to the horizontal type rotary barrel 11 to the tea leaves to be processed, the heat processing is performed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for heat-treating granular or flaked food and drink materials, such as chili pepper, cut young cloth, rough tea in the process of producing green tea, or tea leaves to be processed in the finishing process. It is about.

[0002]

2. Description of the Related Art In general, granular or flaked food and drink materials such as chili pepper, cut young cloth, and tea leaves are dried by blowing hot air or by heating in a high-temperature atmosphere. The temperature, the temperature of the hot air or the humidity of the high-temperature atmosphere, or the amount of water contained in the material itself has a significant effect on the finish of the product, especially on the taste, aroma and flavor, etc. Can be finished to have a strong scent and flavor. For example, for green tea, fresh tea leaves plucked
The fermentation was stopped by heating to about ℃ or more for several tens of seconds. , Sieve,
It is manufactured by adding other finishing processes. In the production of green tea, enzymes such as inactivation of raw tea leaves, heat-drying of rolled tea leaves, heat-drying of crude tea, and burning are used.
It is known that a green tea product having a high flavor and a strong umami can be obtained by performing the treatment at a temperature of 00 ° C. or higher.

[0003]

When heat treatment is applied to raw tea leaves, it is necessary to set the atmosphere to a high humidity and to substantially suppress the evaporation of moisture from the tea leaves. Simply heating it, for example, by applying high-temperature hot air, causes the surface of the tea leaves to lose its moisture content and become dry, and the tea leaves to be treated are stuck to the high-temperature machine walls and conveyors. It is in a state of withering and loses flavor and umami. However, conventionally, there was no such heating means, so that the raw tea leaves were heated using a net conveyor type or a rotating drum type tea leaf evaporator, and steam of normal pressure of about 95 to 105 ° C was applied. In the rough rubbing process, the temperature of the tea leaves was set to 40 ° C.
The treatment was carried out under such conditions, and the heating and drying had to be carried out at a relatively low temperature of about 150 ° C. For this reason, the green tea product has a light flavor and umami and has a blue smell. An object of the present invention is to provide a heat treatment apparatus capable of performing a heat treatment at a desired temperature while appropriately controlling the evaporation of water contained in food and drink materials.

[0004]

The present invention provides a heat treatment apparatus 1
The jet port 26 is disposed in the horizontal rotary drum 11 of the above, and the delivery port 23 of the steam generation tank 21 of the high-humidity hot-air generating furnace 2 is connected thereto, and the humidity in the high-humidity hot-air generating furnace 2 is 60 to 90%. Temperature: 200-390 ° C
The above-mentioned object is achieved by means configured to generate hot air having a high humidity of about the same level and blow it out from the outlet 26 to blow it to the material to be processed in the rotary drum. The horizontal rotary drum 11 may be formed using a metal plate, and the wall surface thereof may be heated by a heater 3 such as a gas burner or a band heater. It is also possible to provide a far-infrared heater 4 in the rotating drum 11 toward the material to be processed, and to heat the material to be processed also by far infrared rays. Horizontal rotating drum 11
The temperature of the outer wall or the inner wall of the rotating body 11 is detected by a non-contact thermometer such as an infrared temperature sensor, and the detection output is used to increase or decrease the heating power of the heater 3 so that the inner wall of the rotary drum 11 A configuration capable of maintaining a predetermined temperature of not less than ° C. can also be adopted.

[0005]

According to the present invention, the heat treatment apparatus comprises a horizontal rotating body in the main body, and a high humidity hot air generating furnace connected thereto to heat-treat the material to be processed. The rotation of the trunk keeps it in a floating rolling state and makes it difficult to adhere to the inner wall surface of the trunk, and at the same time, a gap is formed between the trunks so that contact with hot air is improved and heat treatment is efficiently performed. Moreover, since the hot air has a high humidity of 60 to 90%, even if the material to be processed is exposed to hot air at a temperature of about 200 to 390 ° C,
Local drying from the surface layer is suppressed and high temperature treatment is performed. In addition, when the inner wall surface of the rotating drum is heated by the heater, when the material to be processed comes into contact with the inner wall surface, a vapor layer is generated at that portion, so that the material to be processed does not stick to the inner wall surface.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a specific description will be given of an embodiment in which a heat treatment apparatus for food and drink materials according to the present invention is applied to the production of green tea. In this embodiment, the heat treatment apparatus 1 is a rotary drum type heating machine, the main body of which is constituted by a horizontal rotary drum 11, to which a high-humidity hot air generating furnace 2 is connected. : 60-90%, temperature: 200-390 degrees Celsius. This horizontal rotating drum
Reference numeral 11 denotes a cylinder or a polygonal body, and is rotated at a predetermined speed by a driving device (not shown). An inlet 12 for material tea leaves is formed at one end of the rotating drum 11, and an outlet 13 is formed at the other end, and a guide ridge is provided on the inner wall surface from the inlet 12 to the outlet 13. 14 is helically mounted, thereby providing a horizontal rotating cylinder 11
A spiral groove is formed on the inner wall surface of the to-be-processed tea leaves from the input port 12 while rotating the horizontal rotary drum 11,
The tea leaves are successively moved toward the outlet 13 through the groove while being repeatedly scooped and dropped by the rotation of the rotary drum 11, and are discharged from the outlet 13. In this embodiment, the high-humidity hot-air generating furnace 2 is of a type in which high-temperature air is generated by a burner and steam is generated so that a mixed gas of the high-temperature air and the steam is converted into high-humidity hot air. And burner 22. Steam generation tank 21
Is designed to collect water at the bottom, while the burner
Numeral 22 is attached at an angle of 30 to 45 degrees toward the water surface W of the water, and by blowing a flame onto the water surface W, the water in the vicinity is heated and evaporated. The steam generation tank 21 has a delivery port 23 formed in an appropriate place, and a delivery duct is connected thereto, so that high-humidity and high-heat air generated in the tank 21 is sent out from here, and is supplied to the horizontal rotary drum 11. Has become. In particular, in this embodiment, the high-humidity and high-temperature air blown from the high-humidity / high-temperature hot air generator 2 is processed by arranging the jet port 26 of the high-humidity / high-temperature air toward the tea leaves to be transferred to the rotating drum 11. By spraying tea leaves, the thermal efficiency of hot air is increased. Further, an air supply port 24 is formed at the other end of the steam generation tank 21, and new air is supplied into the tank 21 from the air supply port 24. In this embodiment, a blower 25 is connected in the middle of the delivery duct to suck high-humidity and high-temperature air from the steam generation tank 21 and send it as high-humidity hot air toward the jet port 26. is there.
Further, a spray nozzle 27 is attached to the steam generating tank 21 at a position where the flame blown from the burner 22 does not directly hit, and a mist-like water is blown from the spray nozzle 27. This water mixes with the hot air in the tank 21, evaporates, and is sent out as high-humidity hot air. Therefore, the temperature and humidity of the high-humidity and high-temperature air and the amount of the generated air are determined by the intensity of the flame blown out from the burner 22, the amount of air supplied from the air supply port 24 to the steam generating tank 21, and the amount sprayed from the spray nozzle 27. It is adjusted by appropriately adjusting the amount of water that flows. In this case, since the steam generation tank 21 functions as a mixing tank of the water sprayed from the spray nozzle 27 and the hot air jetted from the burner 22, water is stored at the bottom of the steam generation tank 21 or the burner 22 It is not always necessary to spray the flame onto the water surface W, but by doing so, it is possible to reliably control the temperature and moisture content of the humid and hot air. Further, in this embodiment, the horizontal rotary drum 11 is formed using a metal plate, and a heater 3 such as a gas burner is provided below the horizontal rotary drum 11, thereby heating the wall surface of the rotary drum 11 from the outside. A far-infrared heater 4 is provided in the body toward the tea leaves to be treated, so that the tea leaves to be treated can be heated also by far infrared rays. Note that the heater 3 may be a band heater instead of the gas burner. Reference numeral 5 denotes a thermometer, which is connected to the heater 3 via a control mechanism (not shown), detects the temperature of the outer wall surface of the horizontal rotary drum 11, and adjusts the heating power of the heater 3 based on the detection output. Thus, the inner wall surface of the rotating drum 11 can be maintained at a predetermined temperature of at least 150 ° C. The thermometer 5 is a non-contact thermometer, for example, using an infrared temperature sensor. still,
In the figure, the thermometer 5 is attached to the outside of the horizontal rotary drum 11,
An example in which the temperature of the inner wall surface is indirectly detected by detecting the temperature of the outer wall surface has been described, but this is attached to the inside of the rotating drum 11 to directly detect the temperature of the inner wall surface. Such a configuration is of course acceptable. or,
Although not shown, an infrared temperature sensor for detecting the temperature of the tea leaves to be treated and a sensor for detecting the temperature and humidity in the body 11 are also mounted in the rotating body 11, whereby the rotating hot air generating furnace 2 rotates from the high humidity hot air generating furnace 2. The temperature and humidity of the high-humidity hot air sent into the body 11 and the heating power of the far-infrared heater 4 are adjusted.

[0008]

As described in detail above, the heat treatment apparatus according to the present invention comprises a main body portion constituted by a horizontal rotating drum, and a high humidity hot air generating furnace connected thereto to heat-treat the material to be processed. The material to be processed is kept in a floating rolling state by the rotation of the rotating drum, and a gap is created between them, so it is difficult to adhere to the inner wall surface of the drum, and the contact with high humidity hot air is good, and a high heat treatment effect is obtained. Has the effect. Moreover, the humidity of high humidity hot air
Since it is 60 to 90%, even if the temperature is about 200 to 390 ° C., the material to be processed is treated at a high temperature while suppressing local drying from the surface layer. In addition, by heating the inner wall surface of the rotating drum by the heater, the heat treatment effect of the material to be treated is further enhanced, and when the material to be treated comes into contact with the inner wall surface, a vapor layer is generated at that portion. There is also an effect that the possibility of sticking to the inner wall surface is eliminated.
As a result, when using this heat treatment device in the rough tea process,
The product green tea is excellent in flavor and umami like so-called `` pot roasted tea '', especially when performing heat treatment of raw tea leaves, autumn and winter tea will also be green tea without astringency, When this is used in the finishing step, there is an effect that a product green tea having a high burning effect is obtained. It is to be noted that the material to be processed can be steamed or roasted by making the humidity of the high-humidity hot air higher than this to make it supersaturated or lower than that. Not even.

[Brief description of the drawings]

FIG. 1 is a partially cutaway longitudinal side view showing one embodiment of a tea-making heat treatment apparatus according to the present invention.

FIG. 2 is a front view, partially cut away, of the same.

[Description of Signs] 1 Heat treatment device 2 High humidity hot air generating furnace 3 Heater 4 Far infrared heater 5 Thermometer 11 Horizontal rotary drum 12 Input port 13 Outlet 14 Guide ridge 21 Steam generating tank 22 Burner 23 Outlet 24 Air supply Mouth 25 Blower 26 Spout 27 Spray nozzle

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification symbol FI A23P 1/00 A23P 1/00 // A23L 1/325 A23L 1/325 F

Claims (5)

[Claims] 1. A heat treatment apparatus comprising a rotary drum type heat treatment apparatus and a high humidity hot air generation furnace, wherein an injection port is provided in a horizontal rotation drum of the heat treatment apparatus, and a steam generation tank of the high humidity hot air generation furnace is provided. A discharge port formed at one end and the above-mentioned discharge port are connected by a discharge duct to generate high-humidity hot air in a high-humidity hot-air generating furnace, and to supply it to a horizontal rotary drum. Heat treatment equipment for food and drink materials. 2. A high-humidity hot air generating furnace is used to generate high-humidity hot air having a humidity of about 60 to 90% and a temperature of about 200 to 390 ° C., and to blow it out from a jet port to blow the material to be processed. The heat treatment apparatus for food and drink materials according to claim 1, characterized in that: 3. The heat treatment apparatus according to claim 1, wherein the horizontal rotary drum of the heat treatment apparatus is formed using a metal plate, and the wall surface thereof is heated by a heater such as a gas burner or a band heater. Heat treatment equipment for food and drink materials. 4. The apparatus according to claim 1, wherein a far-infrared heater is provided in the horizontal rotary drum of the heat treatment apparatus toward the material to be processed, and the material to be processed is also heated by far-infrared rays. Or a heat treatment apparatus for food and drink materials of 3. 5. A non-contact thermometer is attached to an outer wall or an inner wall of a horizontal rotating drum, and the thermometer is connected to a heater via a control mechanism. Temperature of the rotating body and the heating power of the heater is adjusted according to the detected
The heat treatment apparatus for food and drink materials according to claim 1, 2, 3, or 4, wherein the apparatus is configured to maintain the predetermined temperature.