RU2195099C2 - Coater - Google Patents

Abstract

FIELD: agricultural engineering, food-processing, pharmaceutical and other branches of industry. SUBSTANCE: coater has coating drum equipped with guides and composed of two chambers: conical chamber and toroidal chamber attached to end of conical chamber, bulk material dosing device, and binding solution feeding device. Conical chamber has inlet cylindrical part with spiral ribs. Guides of conical chamber are formed as spiral channels. Arrangement of spiral channels facilitates acceleration of process for initial formation of raw granules. Granulated and partially dried granules are fed into toroidal chamber for final processing thereof. EFFECT: increased efficiency in coating particles of bulk materials and in granulating, simplified construction and maintenance and improved quality of coated materials. 6 dwg

Description

 The invention relates to equipment for coating particles of bulk materials, as well as for granulation and can be used in agricultural, food, pharmaceutical and other industries.

 Known mixer-seed pellet A.S. SU 1817970, A 01 C 1/06, comprising a housing, loading and unloading nozzles, a working body mounted on the shaft, made in the form of spirals located on the disk that are located on opposite sides of the disk, have opposite winding directions and are made of polymer material.

 In the area where the ends of the spirals are located in the disk, a window is made for pouring material from one spiral into another.

 In this mixer-dragrator, the technological cycle of work at the required speed of rotation of the disks is significantly longer than the passage of the processed materials through the spiral of the disks. Materials must be passed several times through a drag train. Intermittent operation causes poor performance of the drag train.

 Repeated passage of granules through sections of spirals with a small radius also reduces productivity.

 A device for applying shells to dosage forms A.S. 848029, IPC A 61 J 3/06.

 The device comprises a drag coating drum having spiral guides on the inner surface adapted for loading and unloading material, binder solution sprays, heat carrier supply devices and a drive.

 The device with the aim of improving the quality of the coating is equipped with coaxially mounted additional drums of a similar shape having openings for feeding granules. One of the devices for supplying coolant is installed on the outer surface of the drum, and the wall of the drum at the junction with the specified device is made on the perforated cylindrical part. Spiral guides have a different pitch.

 The device has the following disadvantages. The required technological cycle of the device provides much more time for the passage of materials through the drums. In this regard, materials must be passed through the device several times. Intermittent operation causes poor performance. Repeated passage of granules through inner drums with a small radius of spiral guides requires a significant processing time and reduces the productivity of the device. The peripheral speed of the spiral guides, during the transition of the granules from the inner drum to the middle, grows spasmodically, which slows down the formation of raw granules. The flow of coolant through the holes in the wall and in the spiral guides of the outer drum is unreliable due to clogging of the holes.

 The device has a complex structure. It is difficult to observe the process in the inner zone of the guides, it is difficult to clean and repair them.

 Closest to the claimed one is a drag catcher, SU 1123562 A, 11/15/1984, containing a panning drum with guides made of two chambers, conical and mounted on its end toroidal, a rotation drive, a dispenser of bulk materials and a device for supplying a binder solution.

 A disadvantage of the known pelletizer is the low quality of pelleting seeds and low productivity.

 The purpose of the invention is the creation of a pellet mill having high performance and quality pelleting with a relatively simple design.

 This goal is achieved by the fact that in a drag train containing a panning drum with guides made of two chambers, conical and mounted on its end toroidal, a rotation drive, a dispenser of bulk materials and a binder solution supply device installed in the bearings, the drum is connected to the rotation drive, and the conical chamber is made with an input cylindrical part with spiral ribs, while the guides are made in the form of spirals of a gutter-shaped shape and are mounted on the inner surface of the conical cam ry.

 The location of the spiral guides on the conical surface accelerates the initial formation of the raw granules. Formed and partially dried granules are fed into a toroidal drum, where they are processed.

In Fig.1 shows a sniffer, side view;
figure 2 is a view of figure 1 along arrow A;
figure 3 is a view along arrow A on a coil of a spiral guide a;
figure 4 is a view along arrow A on a coil of a spiral guide b;
figure 5 is a view along arrow A on a coil of a spiral guide in;
figure 6 is a cross section of a coil.

 The diffuser comprises a base 1 with a stand 2 fixed on it, on which a drag drum 3 is installed in the bearings, made of two chambers, conical 4 and toroidal 5, mounted on the end of the conical chamber. On the inner surface of the conical chamber there are spiral guides 6 of a gutter-shaped form. On the cylindrical part of the conical chamber 4 there are spiral ribs 7. The drum 3 rotates from the drive 8 through the sprockets 9, 10 connected by a chain 11. The materials to be drained are fed by a dispenser 12. A binder solution is supplied through a pipe 13 with a nozzle 14 at the end. The pipe 15 is designed to supply coolant.

 Drag is as follows. The bulk material from the dispenser 12 is fed into the cylindrical part of the conical chamber 4. The binder solution is fed through the pipe 13 to the nozzle 14 and sprayed onto the material supplied by the spiral ribs 7 to the beginning of the conical chamber.

 When the drum rotates, the granules move along spiral guides 6, the peripheral speed of which gradually increases. After passing through the conical chamber 4, the granules enter the toroidal chamber 5 until the required volume is accumulated in it. After this, the flow of material from the dispenser is stopped. In the chamber 5 is the final processing of granules.

 When moving in a conical chamber 4 and in a toroidal chamber 5, the granules are dried by the coolant flowing through the pipe 15. During the final processing of the granules in the chamber 5, the nozzles of the pipe 15 in the conical chamber 4 overlap. At the beginning of the conical chamber 4, the peripheral speed of the spiral guides and the rates of mutual movement of the flows of the granules are low. The caving angle is also small. Humidity is high, Fig.3.

 Then there is a gradual increase in the peripheral speed of the spiral guides, the speeds of the mutual movement of the flows of the granules and the angle of collapse. Humidity decreases, FIG. 4, 5. A gradual change in all of the above factors in the conical chamber helps to streamline and accelerate the process of the initial formation of raw granules.

 The conical shape of the chamber 4 also contributes to a significant increase in the speed of rotation of the flow of granules around the longitudinal axis compared with the cylindrical shape of the drums in the prototype, Fig.6. This further increases the rate of formation and drying of the granules.

 Thus, the performance of the drag train, due to the presence of a conical chamber in the drum, is significantly higher than the productivity of the prototype. When rolling the shell from several layers, it is necessary to pass the material through the drag train appropriate number of times. Productivity in this case also increases significantly. The pulverizer has a simple design and is easy to maintain.

Claims (1)

 A drag train containing a drag coating drum with guides made of two chambers: a conical and a toroidal drive fixed to its end, a rotation drive, a bulk material dispenser and a binder solution supply device, characterized in that the coating drum is mounted in bearings and connected to the rotation drive, and the conical chamber is made with an input cylindrical part with spiral ribs, while the guides are made in the form of spirals of a gutter-shaped shape and are mounted on the inner surface of the conical amers.

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