JP2001224311A - Partition of residual heat chamber in feeding belt steamer for tea making - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a feeding belt steamer capable of sufficiently steaming raw tea leaves. SOLUTION: This feeding belt steamer for tea making is composed by forming a steam chamber at the front of a feeding surface of a conveyor of the net conveyor type feeding belt steamer, forming a residual heat chamber in a subsequent part, arranging plural steam discharging pipes in the steam chamber, jetting steam into the steam discharging pipes and keeping the residual heat chamber in an atmosphere of saturated hot air and passing the raw tea leaves through the atmosphere of the steam so that the raw tea leaves can then be heated for at least >=1.2 times the heating time with the saturated hot air. Furthermore, partition plates are attached to the residual heat chamber at a suitable interval.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a partition of a preheating chamber in a tea-feeding steamer for tea production.

[0002]

2. Description of the Related Art In order to produce green tea, raw tea leaves plucked in a tea garden are quantitatively supplied to a feeding steamer and steamed for several tens of seconds with steam to produce steamed tea leaves and enzymes contained in the tea leaves. Is then inactivated, followed by treatments such as coarse kneading, kneading, medium kneading, fine kneading, and drying. The feeder steamer is a steam supply pipe in which the upper and lower sides of the feed surface of the net conveyor are covered with a cover plate to form a steaming chamber, in which a number of steam discharge pipes are arranged, and which is arranged outside the steaming chamber. In this method, steam is sprayed from above and below to steam the raw tea leaves uniformly while the raw tea leaves are uniformly placed on the net and transported.

[0003] In recent years, the feeder steamer has a steaming room part as a steam room and a residual heat room, the steam room is filled with steam, the residual heat room is filled with saturated hot air, and the raw green tea leaves are first steamed and then steamed. It is designed to be steamed by heating with saturated hot air.

[0004]

SUMMARY OF THE INVENTION
By installing partitions at appropriate intervals in the residual heat chamber, the smooth flow of the saturated hot air is interrupted, and the tendency of the saturated hot air to come into contact with the raw tea leaves is increased accordingly. From this point, the partition, the lower the edge is closer to the raw tea leaves placed on the conveyor net and narrow the interval between the raw tea leaves, less saturated hot air passing through without contact with the raw tea leaves, That is, the heating efficiency of the saturated hot air is improved. However, the raw tea leaves placed on the conveyor net are not uniform in thickness, and there are protruding stems and leaves, so that the lower edge of the partition must be raised so as not to hinder the transfer. You don't get it. Therefore, this partition has a problem that the effect of increasing the heating efficiency of the saturated hot air is low.

SUMMARY OF THE INVENTION An object of the present invention is to provide a partition having a small space between green tea leaves on a conveyor net and having a high effect of reducing the amount of saturated hot air passing without contacting the raw tea leaves.

[0006]

SUMMARY OF THE INVENTION The present invention solves the problem by means of forming a partition of a preheating chamber using a flexible sheet material and forming the lower edge to have a length in contact with raw tea leaves.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION According to the present invention, a partition of a preheating chamber is formed using a flexible sheet material, and when a protruding raw tea leaf placed on a conveyor net hits the lower edge thereof, It is configured so that it does not curve and hinder the progress of the raw tea leaves. Also, slits are inserted into the partition at intervals of about several tens of millimeters, and it is made up of a plurality of apparently narrow sheet materials, and when the protruding raw tea leaves hit this It is configured such that only that part is curved and the other parts are not affected.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a tea-feeding steamer for tea production according to the present invention will be specifically described based on an embodiment shown in FIG. In this embodiment, the feeding steamer is a continuous steamer of an inclined net conveyor type having a width of about 1,000 to 5,000 mm, and a pair of right and left sprockets 2 is attached to both front and rear ends of a beam 1 of a machine frame. Thus, the chain 31 is suspended from this. An endless belt-shaped conveyor net 3 is stretched over the chain 31 to form an inclined net conveyor, which rotates as the chain 31 rotates. The steaming chamber 4 is formed in a range of about 20 to 45% of the front part of the feeding surface of the conveyor, and the remaining heat chamber 5 is formed subsequently thereto. A plurality of steam discharge pipes 6 are disposed in the steaming chamber 4 at right angles to the traveling direction of the conveyor, and are connected to a boiler via a steam supply pipe (not shown). The steam is blown out to make the inside of the steaming chamber 4 an atmosphere of steam and hot air. The remaining heat chamber 5 is formed to be at least 1.2 times as long as the steaming chamber 4, and the green tea leaves steamed by the steam in the steaming chamber 4 are 1.2 times as long as the steaming time in the steaming chamber. It is designed to be heated for more than twice the time. The residual heat chamber 5 is continuous with the steaming chamber 4, and a partition 51 is provided between the two chambers, and the raw tea leaves pass through the partition 51 and enter the residual heat chamber 5. Steam and hot air, together with the raw tea leaves, pass through the space between the raw tea leaves and enter the remaining heat chamber 5. The surface of the raw tea leaves entering the preheating chamber 5 from the steaming chamber 4 is in a wet state, and the surface is heated to about the same as the temperature of the steam. On the other hand, the steam and the hot air which enter into the residual heat chamber 5 from the steaming chamber 4 together with the raw tea leaves are heated to 95 to 98 ° C. by heat exchange with the raw tea leaves and the peripheral wall surface in the residual heat chamber.
The temperature is lowered to a degree and becomes saturated hot air. The remaining heat chamber 5 is partitioned by a partition 51 into an appropriate length, and each of the compartments is constituted by an upper lid 52 whose ceiling surface is freely openable and closable. The room temperature can be adjusted by adjusting the height or slightly opening it to allow saturated hot air to escape.

The partition 51 does not deteriorate even when it comes into contact with tea leaves in a saturated hot air such as a tetrafluoroethylene resin, and is formed of a tough and flexible sheet material. Also, the portion is curved so as not to hinder the progress of the raw tea leaves, and by doing so, the partition 51 has a length such that the lower edge is in contact with the raw tea leaves placed on the conveyor net 3. It is formed so that there is no gap between the raw tea leaves and the lower edge of the partition 51 through which saturated hot air passes without contacting the raw tea leaves. In particular, the sheet-like partition 51 has at least 50 to 2 in the lower half.
Slits 53 are inserted at intervals of about 00 mm,
Apparently, sheets of this width are arranged side by side, and when a protruding thing of fresh tea leaves hits it, only the thing at that location is curved, so that the gap caused by this hits is made as small as possible is there.

[0010] The conveyor net 3 is rotated, and steam of about 100 to 105 ° C is spouted from the steam discharge pipe 6 to fill the steam in the steaming chamber 4 with the raw tea leaves into the net conveyor. Then, the raw tea leaves are first sent to the steaming room 4, where they come into contact with steam and are steamed. As a result, the surface of the raw tea leaves is at a temperature approximately equal to the ambient temperature (approximately 100 ° C.), and steam is condensed on the surface, and the raw tea leaves are in a “wet surface state”. On the other hand, in the steaming room 4, the steam comes into contact with the raw tea leaves and the conveyor net, and a part of the steam becomes mist-like water droplets due to dew condensation, and the newly injected steam and the air entering together with the raw tea leaves are mixed. Inside 4 is an atmosphere of steam containing hot water droplets and hot air. The raw tea leaves which have been heated in the steaming chamber 4 and have a wet surface are transferred to the preheating chamber 5, and at the same time, the atmospheric steam in the steaming chamber 4 also enters the preheating chamber 5. Since no new steam is injected in the residual heat chamber 5, the mist-like water droplets (hot water) contained in the steam that has entered the steam adhere to the raw tea leaves, and the surface of the raw tea leaves becomes more moist. The water droplets are removed and become saturated hot air. Then, the raw tea leaves are heated to the central part of the leaf meat by contact with the saturated hot air to become steamed tea leaves, and then are discharged outside the machine through the residual heat chamber 5, and then sent to the roughing machine, The following rough tea treatments are added.

[0011]

As described above, the feeder of the present invention forms the front steaming chamber on the feed surface of the conveyor, followed by the remaining heat chamber at least 1.2 times as long as the steaming chamber. Partitions were installed at appropriate intervals in the residual heat chamber, and the saturated hot air in the residual heat chamber passed through this partition, so that the contact with the raw tea leaves increased and the heating efficiency increased There are advantages. In particular, since the partition is made of a flexible sheet material, it can be formed to a length such that the lower edge thereof comes into contact with the raw tea leaves placed on the conveyor net 3, and as a result, the raw tea leaves and the lower part of the partition It is possible to prevent a gap from passing between the edge and the saturated hot air without contacting the raw tea leaves, and the advantage that the saturated hot air contacts the raw tea leaves more and the heating efficiency is further improved. There is. Also, 50 ~
By slitting at intervals of about 200mm,
When a protruding portion of the raw tea leaves hits this, only the portion at that location is curved, and the gap generated by the hitting is reduced, and there is an advantage that the heating efficiency of saturated hot air can be further increased. In addition, since the ceiling surface of each compartment is configured with an openable top cover, the amount of saturated hot air in the compartment can be adjusted, and the appropriate steaming conditions can be adjusted. Is also obtained.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional side view showing an example of a tea-feeding steamer for tea production according to the present invention.

FIG. 2 is a vertical sectional front view showing a main part of the same.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Beam 2 Sprocket 3 Conveyor net 4 Steaming room 5 Preheating room 6 Steam discharge pipe 31 Chain 51 Partition 52 Top lid 53 Slit

Claims (3)

[Claims] A steam chamber is formed at a front portion of a feed surface of a conveyor of a net-conveyor type feeding steamer, and a remaining heat chamber having a length at least 1.2 times as long as the steam chamber is provided at a portion following the steam chamber. In the steaming chamber, a plurality of steam discharge pipes are disposed, and steam is injected into the steaming pipe to fill the steaming chamber. A partition for a residual heat chamber in a tea-feeding steamer, characterized in that a partition is attached to the chamber. 2. The partition of the remaining heat chamber in the tea-feeding steamer according to claim 1, wherein the partition is formed of a flexible sheet material. 3. The partition of the preheating chamber in the tea-feeding steamer according to claim 1, wherein slits are formed in the partition at intervals of about 50 to 200 mm.