RU2506508C2 - Shaft-type airslide drier - Google Patents

Abstract

FIELD: heating, drying.

SUBSTANCE: invention refers to machines for drying of loose, slow-loose and granulated materials. A shaft-type airslide drier includes a loading neck, a drying chamber with wedge-shaped ducts located one under another, an unloading neck, and shaft walls with waste air discharge openings. A wall of each drying duct is bent at the height of 100-200 mm from a perforated load-carrying partition wall throughout its length and forms a pocket for removal of waste air with an inclination angle of a side wall of 35-50° in a vertical plane, which provides obstacle-free flow of grain heap from a pocket and 5-15° in a horizontal plane for equalisation of static pressure above the grain layer; pockets are tightly closed with a confuser for collection of waste air.

EFFECT: invention is aimed at intensification, improvement of a uniform and reliable drying process of grain and other loose materials; reducing energy consumed for drying; simpler structure, manufacturability; reducing room air dust content.

3 dwg

Description

The invention relates to agricultural machinery, namely for drying grain and other bulk products.

Closest to this technical solution is a mine aerosene dryer [1] containing a loading neck, a drying chamber with wedge-shaped boxes located one below the other, an unloading neck, the walls of the shaft have windows for removing the spent coolant.

The disadvantage of this dryer is that the spent drying agent is discharged through windows in the shaft wall and is not reused. In view of the fact that the cross-sectional area of the outlet window is small compared to the cross-sectional area of the load-bearing partition of the aeroflot, an excess static pressure of the exhaust air is created inside the mine, which prevents the drying agent from increasing its filtration rate through the grain layer, complicates the drying process and reduces the reliability of the material transportation process aerofoil, while increasing the cost of driving fans.

The present invention is aimed at intensifying, increasing the uniformity and reliability of the drying process of grain and other bulk materials, reducing energy costs for drying, simplifying the manufacture and manufacturability of the design, reducing dustiness in the air in the room, improving working conditions of staff.

The problem is solved in that the mine aerogelous dryer containing a loading neck, a drying chamber with wedge-shaped boxes located one below the other, an unloading neck, walls of a shaft with windows for exhaust air (or a drying agent), according to the invention, the wall of each drying box is bent at a height 100-200 mm from the perforated load-bearing partition along its entire length and forms a pocket for removing exhaust air with an angle of inclination of the side wall of 35-50 ° vertically, providing seamless GOVERNMENTAL grain heap the swelling of the pocket and 5-15 ° for the horizontal alignment of the static pressure above the grain bed, pockets are sealed confuser for collecting spent drying agent from the drying boxes and all directions of its cleaning and recycling. This achieves a reduction in static pressure on the entire surface of the grain layer, energy consumption for drying.

The proposed design of a mine aerosene dryer for drying bulk materials due to the distinguishing features provides the solution to the task of intensification, increasing the uniformity and reliability of the drying process of grain and other bulk materials, simplifying the manufacture and manufacturability of the structure, reducing dust in the room, improving the working conditions of staff.

In Fig.1 presents a General view of a shaft aerosene dryer, in Fig.2 a drying box with a pocket, in Fig.3 a model of a drying box in 3-D.

The dryer contains a shaft 1 (Fig. 1), in which drying boxes 2 with perforated load-bearing partitions 3 are installed. The wall of each drying box (Fig. 2) is bent at a height of 100-200 mm from the perforated load-bearing partition 3 along its entire length and forms a pocket 4 with an angle of inclination of the side wall of 35-50 ° vertically and 5-15 ° horizontally, the pockets are hermetically closed by confuser 10 (Fig. 1). A drying bin 5 is installed above the shaft 1, and a drying bin 8 with a dispenser 9 is fixed under the shaft 1. At the ends of the shaft 1 there are fixed air distribution boxes 6 with movable shutters 7 (heat generator, box cavities, cyclones for cleaning the spent drying agent are conventionally not shown).

An air-duct shaft dryer for drying bulk materials works as follows: material under the action of gravity from above the drying bin 5 enters the perforated partition 3 of the drying box 2, where it is exposed to jets of air coming out at an acute angle from the slots of the perforated load-bearing partition 3. Distribution of the flow the drying agent in the drying boxes 2 is carried out using a distributor 6, and the air flow rate is set by movable dampers 7. In the process of air passing through the layer of rash which material is a gradual saturation of its moisture. The spent drying agent is sent to pocket 4. Since the cross-sectional area S of the _window (Fig. 2) formed by the walls of the pocket and the shaft is much larger than the total area of the holes in the perforated load-bearing partition, this significantly reduces the speed of the spent drying agent when it leaves the drying box and helps to reduce the aerodynamic drag of the system and the return of the dried material along the inclined wall 4 of the pocket back to the grid 3 of the drying box in case of its fountain Niya. This design of the dryer allows you to create a vacuum over the entire area of the dried material to increase the air supply to the layer without the risk of its removal from the shaft of the dryer, which together contributes to a uniform distribution of air flow over the entire cross-sectional area of the dried material located on the grate 3, to reduce heat loss and dust working area around the dryer. The design of the dryer is simpler to manufacture, technologically advanced and allows for the recycling of exhaust air.

References

1. Pat. 2151983 Russian Federation, IPC7 F26В 3/08. The method of drying agricultural products [Text] / Zimin EM, Krutov VS, Volkhonov MS; Applicant and patent holder FGOU VPO Kostroma State Agricultural Academy. - No. 98105188/06 (005259); declared 03/17/98; publ. 06/27/00, Bull. Number 18. - 5 p.: Ill.

Claims (1)

Mine shaft dryer containing a loading neck, a drying chamber with wedge-shaped boxes located one below the other, an unloading neck, shaft walls with windows for exhaust air, characterized in that the wall of each drying box is bent at a height of 100-200 mm from the perforated load-bearing partition along its entire length and forms a pocket for removing exhaust air with an angle of inclination of the side wall of 35-50 ° vertically, providing unimpeded runoff of the grain heap from the pocket and 5-15 ° horizontal to equalize static pressure over the grain layer, pockets hermetically closed by a confuser to collect exhaust air.

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