JPS61111655A - Apparatus for heat-treatment of tea leaf - Google Patents

Abstract

PURPOSE:To enable the uniform heat-treatment of tea leaves by providing a stirring blade in a boiling tank, and to enable the removal of impurities from tea leaves and the uniform and sufficient heat-treatment of the leaves by ejecting hot water against the heat-treated tea leaves. CONSTITUTION:A conveyor 3 passing through hot water in a boiling tank 4 is placed in the boiling tank 4. The tea leaves are immersed in the hot water and transferred by the rotation of the stirring blade 10, and the tea leaves floating on the hot water is sprayed with hot water with the hot-water sprayer 11. The uniform and moderate heat-treatment of tea leaves can be carried out and the impurities can be removed by this apparatus.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a conveying type heat treatment device for tea leaves, and more specifically, it is capable of producing a seasoned product with uniform quality and no impurities. be.

<Conventional technology> Traditionally, tea leaf conveyance-type heat treatment devices have either applied steam to the tea leaves placed on a conveyor, or heat-treated the tea leaves placed on a conveyor by passing them as they are into a boiling tank. There was something to do.

<Problems to be Solved by the Invention> In the above-mentioned belt-type heat treatment equipment, stirring of the tea leaves is insufficient, making it difficult to uniformly heat-treat the tea leaves and to perform heat treatment to an appropriate degree. Moreover, since the tea leaves are dried with the contaminant still attached to them after heat treatment and sent to the subsequent process, there is a drawback that the quality tends to be uneven and the product is contaminated with impurities.

SUMMARY OF THE INVENTION In view of these problems, an object of the present invention is to provide a tea leaf heat treatment apparatus that can uniformly and appropriately heat-treat tea leaves and can also remove impurities.

Means for Solving the Problems> The configuration of the present invention to achieve the above object is that a conveyor is provided in the boiling tank to pass through the hot water in the tank, and the tea leaves are immersed in the hot water and conveyed by rotating blades. A stirring blade is provided to
A special feature characterized in that a hot water injection device for injecting hot water onto the tea leaves rising from the hot water level is further provided. Embodiment Hereinafter, an embodiment of the heat treatment apparatus of the present invention will be described in detail based on the drawings. do.

As shown in the figure, the heat treatment apparatus of the present invention includes a leaf feeder 1. Chain wheel for conveyor drive 2. A net conveyor 3 which is driven by this and conveys the tea leaves from the leaf feeder 1 into the apparatus. 4. Boiling tank filled with boiling water and running a net conveyor 3't in the boiling water. A machine frame 5 that accommodates the boiling tank 4. A cover 6 that covers the boiling tank 4 and exhausts steam; A motor that drives the net conveyor 3 8. and a rotating chain wheel 9 arranged in an appropriate number within the device to guide the net conveyor 3.

The present invention has the following unique technical configuration in addition to the above basic configuration. That is, first, a plurality of stirring blades 10 are arranged to stir the hot water in the boiling tank 4 and transport the tea leaves by submerging them in the hot water, and also a hot water injection nozzle that sprays hot water onto the tea leaves that have risen from the water surface. 11 are arranged. moreover,
In this embodiment, a plurality of hot water injection nozzles 12 are arranged above the stirring blade 10. A brush roll 7 that rotates to brush off tea leaves adhering to the net conveyor 3 is disposed where the heat-treated tea leaves are transferred to the next process.

The stirring blade 10 used here has a mechanism in which two or more blades rotate in the direction of movement of the net conveyor 3, and transports the tea leaves while stirring the hot water in the boiling tank 4 up and down. It is. The shape of the stirring blade 10 may be a flat plate, a rod, or a modified shape thereof, as long as it stirs the tea leaves and conveys them while suppressing floating. In this embodiment, a curved rod blade 10a shown in FIG. 3(&) and a curved blade LOb shown in FIG. 10 atl of bar blades were arranged, and three curved plate blades 10b were provided between them.

In addition, when only the curved rod blades tOa are used here, it is efficient to alternately overlap them as shown in FIG. 4.

Further, the hot water injection nozzle 11.12 passes below the boiling tank 4 and the check valve 14. Water pipe (
It is connected to a feed water heating pipe 16 that is connected to a water heater (not shown in the figure).

When the water from the water pipe passes through the water supply heating pipe L6t, it is heated by the burner 17 installed below, and is turned into hot water and injected from the hot water injection nozzle 11.12.

Incidentally, the excess hot water supplied to the boiling tank 4 is discharged to the outside of the tank through an overflow pipe 19 attached to the boiling tank 4. -!
After the work is completed, the boiling water is drained from the drain valve 18 installed at the bottom of the tank.
It is discharged by

The configuration of the heat treatment apparatus of this embodiment is as described above, and tea leaves are heat treated as follows.

First, tea leaves are continuously supplied from the leaf feeder 1 to the net conveyor 3, and the tea leaves are conveyed by the net conveyor 3 into hot water in the boiling tank 4. The hot water in the boiling tank 4 is stirred by stirring blades 10 9, and in this state the tea leaves are conveyed while being reversed up and down while being prevented from floating.

In this embodiment, hot water is further jetted downward from a hot water jetting nozzle 12 provided above the stirring blade 10. This hot water injection helps the stirring blade 10 to move the tea leaves vertically and heat-treats the tea leaves when they float up. Furthermore, it serves to supply hot water to the boiling tank 4.

Next, hot water is sprayed onto the tea leaves coming out of the water surface of the boiling tank 4 from the hot water spray nozzle 11. In this process, the tea leaves are
Adhering impurities are removed and heat treatment is performed again to ensure uniform and sufficient heat treatment. Furthermore, the degree of heating here can be easily adjusted by adjusting the amount of hot water jetted from the hot water jet nozzle 11).

Moreover, the hot water injected from this hot water injection nozzle 11 also
It is supplied to the boiling tank 4.

The tea leaves treated as described above are removed from the net conveyor 3 by the brush roll 7 and sent to the next suction draining step and rolling step.

Note that, as shown in FIG. 5, if the number of hot water injection nozzles 11 is increased, cleaning of impurities and reheating treatment become more sufficient. At this time, if the spray water receiving gutter 20 is provided, all the hot water injected from the hot water injection nozzle 11 is supplied to the boiling tank 4,
The exchange of hot water in the boiling tank 4 becomes more sufficient.

<Effects of the Invention> In the tea leaf heat treatment apparatus according to the present invention, the following effects can be obtained.

(r) By providing the stirring blade in the boiling tank, the tea leaves can be reversed up and down and prevented from floating, so that the tea leaves can be uniformly heat-treated.

(2) Since a device is provided for injecting hot water onto the tea leaves that have been heat-treated in the boiling tank, impurities can be removed from the tea leaves, and the tea leaves can be reheated and evenly and sufficiently heat-treated. Furthermore, since the degree of heating in this reheating treatment can be easily adjusted, appropriate heat treatment can be performed.

(3) Since the hot water in the boiling tank is constantly exchanged by supplying hot water from the hot water injection device, impurities are less likely to adhere to the tea leaves.

In addition, as shown in the example, by providing a hot water injection device above the stirring blade in the heating tank, the action of the stirring blade to move the tea leaves upside down is facilitated, and furthermore, even when the tea leaves float to the surface, the heat treatment continues. Therefore, even and sufficient heat treatment can be performed.

Therefore, according to the device according to the present invention, there is no unevenness in quality.
It is possible to manufacture products free of impurities.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram conceptually showing a heat treatment apparatus according to the present invention, FIG. 2 is a partial sectional view and a plan view thereof, and FIG.
It is an explanatory view showing one embodiment of a hot water injection device. Drawing: 1 is a leaf feeder, 3 is a net conveyor, 4 is a boiling tank, 7 is a brush roll, io is a stirring blade, 11.12 is a hot water injection nozzle, 16 is a water supply heating pipe, 17 is a burner, 18 is Drain valve 19 is an overflow pipe.

Claims (1)

[Claims] The boiling tank is equipped with a conveyor that passes through the hot water in the tank, and a stirring blade that submerges and transports the tea leaves into the hot water by rotating the blades, and then injects hot water onto the tea leaves that have risen above the hot water surface. A tea leaf heat treatment device characterized by being equipped with a hot water injection device.