SU1049030A1 - Apparatus for heat processing of green tea-leaf - Google Patents

Abstract

1. DEVICE FOR TEMPERATURE LAYOUTS. GREEN SKILL, contained ftpodi / Krn6 t 2 Yu - I v scale 5 -; :: «. -. rotary hollow drum mounted for rotation, loading and unloading mechanisms, pipes for supplying and discharging hot air, a heating element, so that, in order to improve the quality of heat treatment by eliminating burning of tea leaves with a simultaneous reduction of energy consumption, the heating element, made in the form of a perforated tube with hollow blades having an autonomous supply of heat agent successively to each blade, is set offset from the axis of rotation b arabana towards maxi. mallow concentration of the tea mass during its rotation. 2. The device according to claim 1, about tl and so that it is equipped with a battery of infrared lamps with a reflector, located opposite the heating element .: OmpaSotnaHHbiu bozduk Spent agent gg y Chd1 | . ha J- I

Description

The invention relates to the equipment of the tea industry and can be used to roast lao-h fixing green tea leaves in the production of green long leaf tea and to dry the twisted tea leaves in the production of green and charcoal long leaf tea. A known apparatus for roasting a raw HC1GO tea consisting of a drum, paired augers, a firebox, gas channels of the auger shaft and a chimney. Til The disadvantage of this apparatus is that the paired vane augers compress the roasted tea mass and I compress it the walls of the heated drum. To carry out the process. roasting the tea mass on the surface of the drum and the screw reaches 450-500 ° C, so part of the tea mass in contact with these surfaces is subjected to excessive heat and temperature, which causes the sheet to burn and the quality of the tea leaves to be uneven. . The use of a blade auger causes abrasion and damage to the sheet, contributing to the release of cell sap on its surface and thereby the flow of oxidative undesirable processes, which also negatively affects the quality of tea. It is also known device for. heat treatment of the bulk material, made in the form of rotary drum without holes in the form of slots around the drum circumference, and the supply of heat agent is only located in the J-axial cluster of mother 1 and 2j. However, the material in this device is not subjected to mixing, but is only poured during the rotation of the drum, which is not enough to process the tea leaf. . But closer to the technical essence of the achieved result, the invention is a device for heat treating a green tea leaf, comprising a rotary hollow drum, rotatably mounted, loading and unloading mechanisms, pipes, hot air inlet and outlet, a C 3 heating element. The disadvantage of the known device is that the heat treatment in it is carried out inside the drum due to the heat transferred through the walls of the drum, which are heated to a temperature of 700-800 C. This causes the burning of sty tea lead; is in direct contact with these surfaces. mi Due to non-uniform processing, the quality of the tea leaf deteriorates. The significant length of the drum (4.2 m) at the specified temperature contributes to its deformation and failure. Despite the fact that the rotating drum contributes to the mixing of the tea mass, uneven processing of the product occurs due to the low intensity of tea movement. This causes the burning of the part of the tea leaf that is most often in contact with the heated drum surface. This surface is relatively small. because of which there is little efficiency in the use of thermal energy. Most of the heat escapes with flue gases. Since the drum is closed in the furnace space, 1 heated flue; the gases coming from the furnace through the gas channels, penetrate into the interior of the drum, giving the tea leaf an odor and thus reducing its quality. At e5: the drum can be used only for roasting tea leaves in the production of laoch which production lasts only 30-40 days a year. The rest of the time, the machine is not used. So the utilization rate is very low. . .... The purpose of the invention is to improve the quality of heat treatment by eliminating the burning of the tea leaf with a simultaneous reduction of energy consumption. This goal is achieved by, j, in a device for heat treating a green tea leaf containing a hollow drum rotatably mounted, a loading bar, a discharge mechanism of a heat pipe, a pipe for supplying and discharging hot air, a heating element, the last one, perforated pipes with hollow blades having an autonomous supply of heat agent successively to each blade are installed with. . offset relative to the axis of rotation of the drum towards the maximum concentration of the tea mass during its rotation. In this case, the device can be equipped with a battery of infrared lamps with a reflector located opposite the heating element. Figure 1 shows a device for heat treating a tea leaf, a general view; figure 2 - section aa in figure 1; on fig.Z - section B-Bna figure 1; figure 4 - section in figure 1. The device consists of a hollow drum G, having insulation 2 on the outside. The drum 1 with supporting rims 3 rests on rollers 4 mounted obliquely on the fixed frame 5 at an angle relative to the horizontal. to the end of the drum 1, the lid fixedly b is fixed; the loading mechanism 7, and to the opposite end, the unloading mechanism 8 and the pipe 9 for evacuating hot air. Inside the hollow drum 1, parallel to its axis in the direction of the mixing tea Maycfca, there is a blade heat exchanger 10, mounted for rotation and adjustment of the distance. between its center and horizontal vertical axis of the hollow drum 1, depending on the filling ratio of the device with the product. The heat exchanger 10 consists of a central pipe 11 and several hollow. blades 12-15, internal cavities of which are isolated from each other 15

n about the entire length of the pipe 11, except for the ends, where they are sequentially connected by transitions 16. The internal cavity. the first blade 12. through the hole 17 in the central pipe 11 is connected 20 to the pipe 18 for supplying hot air O and the internal cavity of the last blade 15 through the hole 19

The central pipe 11 is connected to the pipe 20. The possibility of mixing 25 hot air supplied through.

pipe 18, and exhaust air discharged into the atmosphere through. pipe 20 is prevented from being negotiated. rodku 21, distribution worked; - to its air along the entire length inside the central pipe 11 is prevented by a partition 22. Central. The heat exchanger pipe 11 has a perforation 23 in places not covered by hollow blades 12-15 .. The size of the perforation is chosen to prevent the tea mass from getting into the central perforated pipe 11, the internal cavity of which is 24 G is connected to the nozzle 25. 0 Inside the drum 1 opposite to the position of the moving tea mass relative to the drum axis, an additional heating device consisting of 45 of the MAP 26 infrared rays and the reflector 27 is fixedly located. tion for -lamp support 26. The apparatus is provided with a drive (not shown) .50

The device works as follows.

The heat sheet to be heat treated by means of the loading mechanism 7 is fed into Poland "drum 1. The drive is turned on and the bardban 1 begins to rotate, as a result. . outside of which, the tea mass is arranged as a segment in the direction of the rotation of the drum and due to the paclon towards the horizontal and the rotation of the drum 1 gradually moves to the unloading mechanism 8 ...

1. For roasting the tea leaf, hot air is fed through the latrub. 18. The last air is fed through the hole 17 cent - 65.

A tubular pipe 11 is fed into the cavity of the first blade 12 of the heat-strainer 10. A passage along the entire blade 12, hot air heats its surface and, reaching the opposite end of the blade, passes through passage 16 into. The cavity of the second blade 13. Here the hot air moves in the opposite direction to the movement of air in the first blade 12. Reaching the end of the blade 13, the hot air through the transition 16 enters the cavity with the next blade 14. Thus, the hot air afterwards. It passes through the cavities of all the blades 12-15, heating them, and from the cavity. last blade 15 through hole

.19 central tube 11 enters chimney 20 from where it is emitted into the atmosphere. The heat exchanger 10 thus heated, rotating in the direction of rotation of the drum 1, takes a portion of the tea and transfers it through itself, transferring a certain amount of heat. Such pereaplachivanie processed product increases the interphase contact between the tea. mass and working agent that gives the chance of uniform processing

; lateral and process intensification

roasting Simultaneously with the feed.

The mountain of which the air is turned on is the battery of infrared lamps 26, which is characterized by a significant penetration of heat into the mass. The reflector 27 contributes to the direction of the rays on. tea mass segment. Thermal insulation 2 drum 1 eliminates the possibility of loss of heat, and thereby concentrates all the thermal energy inside the drum, while reducing energy consumption; raty. When roasted, moisture evaporates through pipe 9 to the atmosphere. To prevent tea leaf injuries, the linear velocities are equal to those of heat exchanger 1 and heat exchanger 10.

Drying the tea leaves in the device is carried out similarly to the process of roasting by selecting the appropriate regime parameters. Difference; It consists in the fact that during drying there is a greater amount of moisture. To remove this moisture, hot air is fed through pipe 25 into central pipe 11. The latter, through the perforation 23, enters the interior of the drum 1, is poured with moisture absorbed during drying and is emitted into the atmosphere through the pipe 9.

with

Fixing the tea leaf in the device is carried out similarly to the drying process. The difference is that during fixation, through the nozzle 25, instead of hot air, a specific pair of certain steam is supplied ;; fo; E.

Thus, the proposed device allows the production of roasting of tea leaves during the production of l & oh cha, fixation in the production of green long leaf tea, and. Suivsi - in the production of green and "hot bye tea", so the device can be used in the tea chain of the whole tea-processing season, which gives a significant

Yu

15

increase device utilization.

Placing sources of thermal energy inside the drum and its thermal insulation from the external environment allows (Concentrate all the energy inside the drum, make maximum use, it is for carrying out the heat treatment, as much as possible to reduce energy losses by reducing the energy consumption.

± 4

FIG.

FIG.

Claims (2)

(543 1. DEVICE FOR THERMAL PROCESSING OF GREEN TEA SHEET, content Product. ------------------------- »jo >> X» U0E ^^ <y; ^ hollow drum, rotatably mounted, loading and unloading mechanisms, pipes for supplying and discharging hot air, a heating element, so that in order to improve the quality of heat treatment by eliminating the burning of tea leaves while reducing energy consumption, the heating element is made in the form of a perforated pipe with hollow blades having, / autonomous supply of heat agent sequentially to each blade installed with an offset flax axis of rotation of the drum in the direction of the maximum concentration of tea mass · during its rotation. 2. The device according to claim 1, with the fact that it is equipped with a battery of infrared lamps with a reflector located opposite the heating element. Spent Bozduk% q Spent Agent | /!