JPH09220052A - Tea powder drying device of secondary rolling tea dryer in tea making - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tea powder drying device for uniformly drying and then feeding to the following step because of uneven drying of tea powder recovered from a secondary rolling tea dryer. SOLUTION: This tea powder drying device is operated by means connecting to a tea powder separator, providing a hopper housed in tea powder, providing a determination feeder of tea powder in a hopper, feeding tea powder in a cylindrical rotating drum every a definite amount, heating a rotating drum from the outside, passing the separated tea powder through a cylindrical rotating drum and drying the tea powder. Thereby, wet tea powder is not mixed in tea leaves fed to the following step to improve quality and efficiency of a product.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for drying tea powder discharged from a tea making and kneading machine for producing green tea.

[0002]

2. Description of the Related Art In a tea manufacturing process in which steamed and heat-treated tea leaves are dried while applying a kneading pressure, a middle kneading machine
It is located in the process following rubbing. The central kneader supplies hot air from one side of the rotary drum to dry the tea leaves inside the rotary drum,
Exhaust is being performed from the other side. Exhaust gas contains a large amount of tea powder, and a tea powder separator such as a cyclone separates the exhaust gas from the tea powder. In the middle kneading process, batch processing is performed, and one tea leaf (about 60 kg of raw leaf equivalent for 60 k type, 120 kg for 120 k type, etc.) is put into the middle kneading machine, and a certain time (about 20 minutes to 50 minutes) Receive processing.

The tea powder separated from the exhaust gas is continuously and gradually discharged from the beginning of the introduction of the tea leaves into the middle kneader. Conventionally, this tea powder is stored in the take-out conveyor provided in the middle kneading machine when it is directly sent to the next refining process by the transport machine or when it is directly sent to the dryer, and after the middle kneading process, it is taken out. There are cases such as when the tea leaves are mixed with the dried tea leaves and sent to the next step.

[0004]

[Problems to be Solved by the Invention] The tea powder that appears in the initial stage after the medium-rubbing is not dried and contains a large amount of water. Therefore, in the scouring process or the drying process, these tea powders having a high water content are not sufficiently dried and are discolored. Further, in the above case, since the tea leaves that have come out of the medium kneading are distributed to a large number of measuring devices provided in the kneading machine, a large amount of only tea powder will enter a specific measuring device.
In the case, since tea powder having a large amount of water enters the substantially dry tea leaves, the drying tends to be uneven. In the case of 1, the discoloration of the undried tea powder occurs even while it remains in the take-out conveyor until the end of the single middle kneading process. Further, the tea leaves taken out from the middle kneading machine are transported without being completely mixed, and a phenomenon occurs in which tea powder becomes extremely large in a part of the fine kneading machine.

[0005]

According to the present invention, a tea powder accommodating hopper is provided which is connected to a tea powder separator, a constant amount of tea powder is provided in the hopper, and a fixed amount of tea powder is supplied to a cylindrical rotary drum. The problem is solved by means of supplying powder, heating the rotary drum from the outside, and passing the separated tea powder through a cylindrical rotary drum to dry.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION A tea powder containing a large amount of water discharged from a tea making and kneading machine is lifted and dropped by a crosspiece provided in a side wall of a rotary drum or a cylinder in a heated rotary cylinder.
By repeating the mixing, the heated side wall and the heated air in the cylinder are brought into contact with each other to move while moving from the inlet to the outlet to be dried.

[0007]

[Examples] A tea making and kneading machine (drawing, not shown) has a cylindrical rotary drum that is laid horizontally, and a certain amount of tea leaves is put into the rotary drum. Hot air is supplied from one side while absorbing moisture from the other side. The material is dried while being discharged. A wire mesh is provided on the exhaust side of the rotary drum to prevent tea leaves from coming out of the drum. However, the tea powder passing through the wire net is discharged together with the exhaust gas, separated from the exhaust gas by the cyclone 1 for separating the tea powder, and dropped into the hopper 2. A screw 3 is provided at the bottom of the hopper 2. A motor 4 drives the screw 3. By rotating the screw 3, the tea powder in the hopper 2 is supplied into the rotary drum 5 of the tea powder drying apparatus of the present invention. The supply amount can be adjusted by changing the rotation of the screw 3.

The rotary cylinder 5 is fixed to a rotary shaft 7 by an arm 6. By rotating the sprocket 8 provided on the rotary shaft 7, the rotary drum 5 rotates. (Drive part,
The outside of the rotary cylinder 5 is covered with a cover 9. A gas burner 10 is provided below the rotary drum 5, and the hot air of the gas burner 10 heats the lower portion of the rotary drum 5 from the outside, rises along the rotary drum 5, and is discharged from the upper portion of the cover 9. .. The tea powder 11 supplied into the rotary drum 5 is
By repeating the rotation of (1), while repeating rising and falling along the body wall, it is dried by hot air, drops from the discharge side, and is carried to the next step by the air transport device 12. If necessary, a crosspiece may be provided on the rotary drum 5 to improve the shaking of the tea powder, or the rotary drum 13 may be provided with irregularities as shown in FIG.

[0009]

EFFECTS OF THE INVENTION After finishing the middle rubbing operation, the tea leaves to be sent to the next step are not mixed with the moist tea powder, and the quality and efficiency of the product are improved. Further, in recent years, the middle kneading process is often divided into the first and second processes. In that case, if this drying device is provided in the middle kneading machine of the first step, the tea powder discharged from the first middle kneading machine is sent to the next step without passing through the second middle kneading machine. Will not be polluted with tea powder and the exhaust of the second crumpling machine will be very good, and the quality and efficiency of the product will be improved.

[Brief description of drawings]

FIG. 1 is a front view of a tea powder drying device.

FIG. 2 is a sectional view of a tea powder drying device.

FIG. 3 is a cross-sectional view of a rotary drum provided with unevenness.

[Explanation of symbols]

 1 cyclone 2 hopper 3 screw 4 motor 5 rotating body 6 arm 7 rotating shaft 8 sprocket 9 cover 10 gas burner 11 tea powder 12 air transport device 13 rotating body 14 valve 15 bearing 16 frame

Claims (1)

[Claims] 1. A cylindrical rotary drum, wherein tea powder discharged from a tea making and kneading machine is received by a hopper, and a fixed amount is supplied from one end of a horizontally mounted cylindrical rotary drum, and the rotary drum is heated from the outside. While drying the tea powder passing through it, discharge it from the other end,
A tea powder drying device of a tea making and kneading machine characterized by sending to the next process.