JPH0849972A - Drier for powdered tea to be presented - Google Patents

Abstract

PURPOSE:To prevent an uneven drying with a reduction in installation area by arranging endless belt-shaped nets formed using a metal screen in a plurality of stages from a feeding port of steamed leaves as transporting belt and breathing porous plates to form a transporting belt in the following stages. CONSTITUTION:After steamed by water vapor, tea leaves 5 are fed into a drying chamber at a feeding port 6 at an upper part of a drier. The steamed leaves 5 fed are placed on an endless belt-shaped net 1 made of a metal screen provided at the topmost stage, transferred to a roll 7 for supporting the endless belt-shaped net 1 with a shaft being dried thereon 1 and then, fed onto the endless belt-shaped net 1 at the second stage. Then, the leaves are transferred again to the roll 7 for supporting the net being dried to be fed onto a porous plate 2 at the third stage. Following the third stage, they are placed on the porous plate 2 at the subsequent stages one after another to be moved to the lowermost stage. After moved to the final end of the porous plate 2 at the lowermost stage, the tea leaves 5 are placed on a conveyor 10 at a takeoff port 9 to be carried to the subsequent process thereby enabling the elimination of uneven drying.

Description

【発明の詳細な説明】Detailed Description of the Invention

【０００１】[0001]

【産業上の利用分野】本発明は、茶生葉を蒸した後、も
まないで乾燥するてん茶製造工程に使用する多段式のて
ん茶用乾燥機に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-stage tencha dryer used in a tencha manufacturing process in which fresh tea leaves are steamed and then dried without delay.

【０００２】[0002]

【従来の技術】従来のてん茶用乾燥機においては、耐火
煉瓦製の大型の乾燥炉を築き、その内部に金網で出来た
輸送帯を循環させる構造となっている。一部に、煎茶用
の多段式の通気乾燥機を利用して、てん茶を製造してい
るところもある。2. Description of the Related Art A conventional tencha dryer has a structure in which a large refractory brick drying oven is built and a transportation zone made of wire mesh is circulated therein. In some cases, tencha is manufactured using a multi-stage aeration dryer for green tea.

【０００３】[0003]

【発明が解決しようとする課題】従来のてん茶用乾燥機
では、耐火煉瓦製の乾燥炉が広い設置面積を必要とし、
設備費も高価であるという問題点があった。一方、煎茶
用の多段式の通気乾燥機を利用した場合は、蒸熱された
ばかりの蒸葉が投入されると、蒸葉が多孔板に付着して
しまい、通気が悪くなり、乾燥むらを起こし、品質の低
下をまねく等の問題があった。金網を循環させた輸送帯
では、輸送帯の上側しか輸送面として利用出来ない為、
乾燥面積として半分しか利用出来ず、非常に効率が悪い
という問題がある。これに対して、多孔板の場合は、輸
送帯の端で多孔板を反転させ、上側の茶葉を下に落下さ
せ、循環する輸送帯の上下両面を利用出来るので、乾燥
面の利用効率は高くなる。In a conventional dryer for tencha, a refractory brick drying oven requires a large installation area,
There was a problem that the equipment cost was also expensive. On the other hand, in the case of using a multi-stage aeration dryer for green tea, when the steamed leaves that have just been steamed are added, the steamed leaves adhere to the perforated plate, resulting in poor ventilation and uneven drying. There were problems such as deterioration of quality. In the transportation zone where the wire net is circulated, only the upper side of the transportation zone can be used as the transportation surface,
There is a problem that only half of the dry area can be used, which is very inefficient. On the other hand, in the case of a perforated plate, the perforated plate is inverted at the end of the transportation zone, the tea leaves on the upper side are dropped, and the upper and lower sides of the circulating transportation zone can be used, so the utilization efficiency of the drying surface is high. Become.

【０００４】本発明は、設置面積が少なく、設備費が安
く、且つ、乾燥むらを起こさない構造のてん茶用乾燥機
を提供しようとするものである。An object of the present invention is to provide a tencha dryer having a small installation area, a low facility cost, and a structure which does not cause unevenness in drying.

【０００５】[0005]

【課題を解決するための手段】本発明では、蒸葉の投入
口から複数段は、金網を用いて形成された無端帯状ネッ
トを輸送帯として設け、それ以降の段は通気性多孔板の
輸送帯で構成する手段をとるものである。According to the present invention, an endless belt-like net formed by using a wire mesh is provided as a transportation zone at a plurality of stages from the steam feed leaf inlet, and the subsequent stages are for transportation of a breathable porous plate. It is a means of forming a belt.

【０００６】[0006]

【作用】上記のように構成された多段式のてん茶用乾燥
機において、多孔板の輸送帯の空間率が１５％〜２５％
に対し、金網の輸送帯は空間率７０％〜８０％以上の
為、熱風が透りやすい。蒸熱された茶葉は、最初は接触
面積の少ない金網上に投入され、ある程度乾燥してから
多孔板の輸送帯にのるため、乾燥機内の輸送帯に茶葉が
付着しなくなり、通気が良くなるために、乾燥むらがな
くなる。In the multi-stage type tea dryer having the above structure, the porosity of the transportation zone of the perforated plate is 15% to 25%.
On the other hand, in the transportation zone of the wire mesh, the porosity is 70% to 80% or more, and therefore hot air is easily transmitted. Steamed tea leaves are initially put on a wire mesh with a small contact area, and after being dried to some extent, they are placed on the transportation zone of the perforated plate, so that the tea leaves do not adhere to the transportation zone in the dryer and the ventilation is improved. In addition, there is no unevenness in dryness.

【０００７】[0007]

【実施例】実施例について図面を参照して説明する。本
実施例は１０段式のてん茶用乾燥機である。１段目、２
段目は輸送帯を金網製の無端帯状ネット１で構成し、３
〜１０段目までは輸送帯を通気性の多孔板２で構成して
ある。熱風発生用の火炉３はてん茶用乾燥機とは別に設
けられ、ダクト４により上部と下部の２か所よりてん茶
用乾燥機内に供給される。EXAMPLES Examples will be described with reference to the drawings. The present embodiment is a ten-stage tencha dryer. 1st stage, 2
In the step, the transportation zone is composed of the endless belt-shaped net 1 made of wire mesh.
From the 10th stage to the 10th stage, the transportation zone is composed of the air-permeable porous plate 2. The furnace 3 for generating hot air is provided separately from the tencha drier, and is supplied into the tencha drier from two places, an upper part and a lower part, by ducts 4.

【０００８】茶葉５は蒸機で蒸された後、乾燥機の上方
にある投入口６から乾燥室内へ投入される。投入された
蒸葉５は、最上段に設けられた金網製の無端帯状ネット
１の上にのり、乾燥されながら無端帯状ネット１の上で
無端帯状ネット１を軸支するためのロール７まで移送さ
れた後、２段目に設けられた無端帯状ネット１の上に投
入される。そして、再び乾燥されながら軸支するための
ロール７のところまで移送された後、３段目に設けられ
た多孔板２の上に投入される。３段目の多孔板２の上で
乾燥されながら一番端まで移動すると、多孔板２を支え
ていたレールがなくなり、多孔板２が反転して、茶葉５
は４段目の多孔板２の上にのる。同様にして、茶葉５は
乾燥されながら４段目から５段目へ、又５段目から６段
目へ移動し、最下段の１０段目まで移動する。１０段目
に多孔板２の一番端まで移動すると、茶葉は取出口９か
ら乾燥機の外に備えつけられたコンベア１０上にのり、
次の工程へ運ばれていく。After the tea leaves 5 are steamed by a steamer, they are put into a drying chamber through a charging port 6 located above the dryer. The introduced steamed leaves 5 are placed on the wire mesh endless strip net 1 provided at the uppermost stage, and while being dried, transferred to the roll 7 for axially supporting the endless strip net 1 on the endless strip net 1 while being dried. After being processed, it is put on the endless belt-shaped net 1 provided in the second stage. Then, while being dried again, it is transferred to the roll 7 for supporting the shaft, and then put on the perforated plate 2 provided in the third stage. When it moves to the end while being dried on the third perforated plate 2, the rail supporting the perforated plate 2 disappears, the perforated plate 2 is inverted, and the tea leaves 5
Rests on the fourth perforated plate 2. Similarly, the tea leaves 5 move from the 4th stage to the 5th stage, or from the 5th stage to the 6th stage while being dried, to the 10th stage, which is the lowest stage. When the tea leaves are moved to the end of the perforated plate 2 at the 10th stage, the tea leaves are transferred from the outlet 9 onto the conveyor 10 provided outside the dryer,
It is carried to the next process.

【０００９】[0009]

【発明の効果】本発明は、上述のように構成されている
ので、輸送帯に茶葉が付着しなくなるために乾燥むらが
できなくなり、品質の高い製品が出来る。又、熱風が透
りやすくなるため、乾燥時間が短縮され、運転コストが
低減され、通気性の多孔板を複数段用いた輸送帯の代わ
りに、一部に金網を用いたため、乾燥機の製造コストが
低減される。又、耐火煉瓦製の乾燥炉内を金網で出来た
輸送帯だけを循環させたものに比べ、設置面積が少な
く、設備費も少なくてすむ。EFFECTS OF THE INVENTION Since the present invention is constructed as described above, since tea leaves do not adhere to the transportation zone, unevenness in drying cannot occur and a high quality product can be obtained. In addition, since the hot air easily penetrates, the drying time is shortened, the operating cost is reduced, and a wire mesh is used in part instead of the transportation zone using a plurality of breathable perforated plates. Cost is reduced. In addition, the installation area is small and the equipment cost is low compared to the one in which only the transportation zone made of wire mesh is circulated in the drying furnace made of refractory bricks.

【図面の簡単な説明】[Brief description of drawings]

【図１】本発明におけるてん茶用乾燥機の正面図。FIG. 1 is a front view of a tencha dryer according to the present invention.

【符号の説明】[Explanation of symbols]

１ 無端帯状ネット ２ 多孔板 ３ 火炉 ４ ダクト ５ 茶葉 ６ 投入口 ７ ロール ８ 排気口 ９ 取出口 １０ コンベア 1 Endless band net 2 Perforated plate 3 Furnace 4 Duct 5 Tea leaf 6 Input port 7 Roll 8 Exhaust port 9 Outlet port 10 Conveyor

Claims (1)

【特許請求の範囲】[Claims] 【請求項１】 多段式のてん茶用乾燥機において、蒸葉
の投入口から複数段は金網を用いて形成された無端帯状
ネットを輸送帯として設け、それ以降の段は通気性多孔
板で輸送帯を構成したことを特徴とするてん茶用乾燥
機。1. In a multi-stage dryer for tencha, an endless belt-like net formed by using a wire net is provided as a transportation zone in a plurality of stages from an inlet of steamed leaves, and subsequent stages are air-permeable perforated plates. A dryer for tencha, which has a transportation zone.