SU1369713A1 - Arrangement for drying tea - Google Patents

Abstract

The invention relates to devices for drying tea and can be used in tea factories of primary processing. The purpose of the invention is to increase productivity and quality of tea. The device contains a corr -, star I, perforated drum 12, mounted in the housing so that it can be rotated. Inside the drum 12, there is a device for inserting a product layer, including a cylindrical perforated wall 6 and a flat continuous wall 7. The device is connected to the air supply sources, and the case I is provided with nozzles 20 for its removal. A rotating screw 14 is arranged outside the wall 7, and a rotary brush 17 is mounted outside the drum 12. A blade device 18 is mounted in the lower part of the housing 1 for drying the sifted fine particles of tea. 3 hp f-ly. 4 il. with B-B (L

Description

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The invention relates to devices for drying tea and can be used in the food industry, namely in tea factories of primary processing.

The purpose of the invention is to increase the productivity and quality of tea.

Making the flat wall solid, and tools for leveling the product layer open at the ends for supplying air allows air to be fed into the drum from the center to the periphery, which reduces the possibility of the layer contacting the fixed surface of the cylindrical wall and thereby reduces the workout forces This surface eliminates abrasion and, as a result, improves the quality of tea; These features allow to exclude air-sealing means (flexible partitions) from the design of the dryer, which increases the reliability of the device in operation and also eliminates air loss without using it and thereby increases the thermal efficiency and productivity of the dryer.

Placing the auger on the outside of the flat wall from the loading nozzle to the product unloading nozzle and performing the auger turns with a step decreasing to the product unloading nozzle, makes it possible to arrange the drum strictly horizontally, since the function of moving the product to the outlet in this case auger, which increases the operational reliability (for example, the degree of wear of the role of coopores decreases), as well as to preserve the thickness of the product when sifting small particles of tea, which creates favorable conditions for the passage of air through the product and its full use and thereby increases the productivity of the dryer.

The implementation of a device for unloading small particles of tea in the form of a shaft with blades allows intensive mixing of small particles of tea during the drying process, which increases the drying intensity and, thus, the capacity of the dryer in the evaporated water.

Providing a rotary brush mounted in the housing with the ability to interact with the outer surface of the drum allows you to continuously clean the perforation holes of the drum from the jammed tea leaves, which improves the condition of air passage and sifting of small particles of tea that is necessary for the fractionation of a non-uniform tea mixture during the drying process.

Making a flat wall with a slope in the horizontal about the plane 60-65 and the height from the flat cylindrical wall greater than the radius of the latter provides an increase in the volume of the working gap formed by the drum and the cylindrical wall, which leads to an increase in the filling ratio of the drum and m (m the dryer capacity itself).

Figure 1 shows a schematic diagram of a device for drying tea, a general view, a section; figure 2 - section aa in figure 1; on fig.Z - section BB in figure 1; figure 4 - section bb In figure 2.

The device for drying includes a housing 1, on the horizontal axis 2 of which, at a distance from one another, are located diaphragms 3, each of which consists of two sector-like parts 4 and 5; A cylindrical perforated wall 6 and a flat continuous wall 7, representing a segment (hollow element) in cross section, are fixed to the diaphragms.

Walls 6 and 7 form a device for leveling the product layer, the ends of which are open to supply coolant (air).

The said device is rigidly mounted in the housing 1 and at the ends provided with guide rings 8, on which the blades I1 located along the axis 2 on the same circle are installed by means of the roller bearings 9 using ring-shaped walls 10. On the blades 11, a perforated metal wall is rigidly fixed outside, forming a drum 12, on the central part of which (outside) is a gear wheel 13, kinematically connected with a drive (not shown).

Inside the drum 12 (outside the flat wall 7) a rotating screw 14 is fastened, connecting the nozzles 15 and 16, respectively, for loading and unloading the product. The turns of the screw 14 are made in increments decreasing to the nozzle 16.

In the lower part of the housing 1 there is a set-, flap-rotary brush 17 with the possibility of interaction with the outer surface of the drum 12. In the housing 1 under the brush 17 there is mounted a rotating bladed fixture 18 connected to the nozzle 19 for unloading fine particles of tea. At the top of the housing there are connections for exhaust air 20.

The internal volume of the alignment device for the product layer is divided into two parts by means of a partition 21.

Flat wall 7 has a horizontal inclination of 60-65. The radius of the cylindrical wall 6 is smaller than the width of the device for leveling the product layer, measured perpendicular to the flat wall 7.

The device for drying tea works as follows.

Raw tea is loaded into the nozzle 15, and from there it flows through the screw 14 to the outermost part of the drum 12. At the same time, hot air enters the device through the open ends of the device for extracting the product layer.

In drum 12, particles of tea are picked up by paddles II and transported into the gap between drum 12 and cylindrical wall 6, where they are blown with an intense stream of hot air coming from the perforation opening of the cylindrical wall 6 and moving to the periphery of the housing 1 through the perforations of drum 12, in a layer equal to thickness. After rounding the cylindrical wall 6, tea particles spill down and fall onto a flat wall 7. The wall inclination is 60-65 ° larger than the free dumping angle of the tea leaves, which makes tea leaves rolling on the wall 7 and directed to the turns of the screw 14, which move in the direction of the nozzle 16 for a certain length and fall back onto the drum 12, and then the cycle is repeated until the product is shifted by the screw 14 to the nozzle 16-to discharge the product. Fine particles of tea sifted from the drum

12 through the perforation holes of it, enter the blade device 18, where they are intensively mixed with guide vanes, dried to the technological standard and unloaded from the device through the nozzle 19.

Claims (4)

1. A device for drying tea, including a body with installed in it rotatably with a perforated drum with blades on the inner surface, a device for winding a layer consisting of a hollow element having a segment shape in cross section, inside the drum with a gap, the cylindrical wall of which is perforated, and containing an auger, branch pipes for loading and unloading tea and a device for unloading fine particles, mounted along the drum In the lower part of the body, characterized in that, in order to improve the performance and quality of tea, the device for leveling the bed has open ends for supplying the heat agent, its flat wall is made solid, and the screw is placed on the outside of the flat wall from the nozzle to the nozzle for unloading tea at the same time the screw is executed with a step, reduced to the nozzle to discharge the product. 2. The device according to claim 1, about tl and - that the device for unloading small particles of tea is made in the form of a shaft with blades. 3. The device according to claim 1, about tl and - so that it is equipped with a rotary brush mounted in the housing for cleaning the outer surface of the drum. 4. The device according to claim 1, wherein the device for leveling the layer is installed so that its flat wall makes an angle of 60-65 with the horizontal, and the height from the flat wall to the cylindrical wall exceeds the radius of the latter. " " 20 . IDD- "J D.2 .A II It (.1 С (1iЛ . //./ GTGT ... / .... / ... / g /. , j} rgI / Z-j, -L- 7ZhO. . Ha 114; G7 П П П О and and and about 7d Q .Q and a C C fc vn , -L- 7ZhO. . one -fr / o Ro hell go c 1 vn / 7 D Phie.1 n Iff .A A A A UCH UCH UCH L UCH V V V V V / rFig. B- B Y // r / 12