SU1210906A1 - Installation for applying film coatings on granulated materials - Google Patents

Description

I

The invention relates to equipment for the preparation of spatial liquid films and the application of film coatings on granular materials and can be used in the encapsulation of various agricultural seed materials, as well as in the chemical and medical industry for coating granular materials.

The purpose of the invention is to improve the quality of the coating.

FIG. 1 shows the installation section; in fig. 2 — node 1 in FIG. one.

The installation for applying film coatings comprises a housing 1 with a lid 2, branch pipes 3, 4, 5 for discharging gas, liquid and coated granules, in which the device 6 for supplying gas drying the film on granules, collection 7 unused liquid, granulator 8 granules, A liquid film dispenser 9 mounted in a collar 2. A liquid film dispenser 9 is a coaxially mounted inner 10 and an outer 11 branch pipes, between which are arranged with a gap in a checkerboard separating ring ca 12 and 13. A cap 14 and nozzles 15 and 16 are attached to nozzle 11 for supplying a liquid and for withdrawing gas, respectively. Between the pipes 10 and 11, a damper is installed from a perforated ring 17 and solid rings 18 and 19. The ring 17 intersects the annular cross section between the pipes 10 and 11, the ring 18 is installed with a gap relative to the external nozzle 11, and the ring 19 - with a gap relative to inner tube 10. Thus, a zigzag junction for a liquid is formed, ending at the center of the pacifier. The upper edges of the free rings 18 and 19 are filled with rounded. A disk-film former 20 is attached to the nozzle 10, in which the upper edge is rounded and the lower end of the nozzle 11 is located opposite this edge and is rounded with a parallel edge rounded off (FIG. 2). On the cover 14 of the distributor 9, there is a device for adjusting the annular gap between the film-former 20 and the nozzle 11, which consists of a screw hole

0906

pairs 21 and electrodgptol 22.. on the lid 14, the prince 23 is reinforced to rotate the shaft of the pellet spreader, which consists of pulleys 24 5 and electric motor 25.

Under the film former 20, there is a spreader 8 granules, below its collection 7 unused liquid, which is covered with a mesh, which prevents collection 7 from falling into granules. Parallel to the collector 7 in the housing 1 is mounted a shell 26 of a woven mesh in the form of a truncated cone, directed by the top 5 downwards. The angle of inclination of the cone is 30. At the top of the cone of the shell 26 a short cylindrical shell 27 is attached to which the bottom 28 is fixed, obliquely located in the side 20 of the housing 1 and closing the annular space between the shell 26 and the housing 1, thus forming an additional collection of unused liquid connected through a 25 port 4 , pipe 29 and pump 30 with nozzle 15. A device 6 for supplying gas drying the film on the granules is located in the lower part of the housing 1. In the bottom of the housing 1 there is a nozzle 5 for draining the coated granules. A feed hopper 31 and a receiving chamber 32 are used to feed the pellets into the installation.

I 35 Film Coater

coatings on granular materials works as follows.

Liquid through the pipe 15 enters the annular space between

40 by an external branch pipe 11 and an internal branch pipe 10, flows through separate rings 12 and 13, where the gases are removed from the liquid, and gets onto the ring 17 of the soothing liquid. Pass through the openings of the ring 17 and the annular gaps of the subsequent rings 18, 19 of the quencher, the liquid is also quieted from the chamber of the calmed liquid through the annular gap

50 flows out in the form of an annular, domed thick film, is directed to the collection 7 of unused liquid, and from the collection 7 the liquid flows through line 29 to the pump

55 30. Obtaining spatial films of different flight paths and thickness is provided by adjusting the height of the annular gap from to .3

power of the device for its regulation.

The granulated materials enter the feed hopper 31, are fed to the receiving chamber 32, from where, having passed through the nozzle 10, 8 granules come out to the spreader. The spreader is designed so that each granule (grain, tablet) passes through the film separately. This results in the application of the required amount of covering liquid to each granule, depending on the thickness of the covering layer. Under the action of surface tension, the liquid is evenly distributed over the surface of the granular material, providing 109064

chiva high quality coating. In order to prevent injury, the separation of granules that hit the spreader blade 8 and into the wall 5 of the housing. 1, the latter are gummed. When the granules are possibly injected into the receiver of unused liquid, the receiver is covered in a wire mesh with a mesh size

10 smaller than the size of granular materials. Next, the granules arrive at the outlet nozzle, in front of which there is a gas flow, which allows the film to solidify on the granules.

15 and reduces the rate of incidence; gas flow depends on the composition of the granules and the rate of solidification of the film.

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9g 2

Editor M.Tovtin

Compiled by V.Pina

Tehred N. Bonkalo. Proofreader E. Roshko

Order 2527 Circulation 681 Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Production and printing company, Uzhgorod, st. Project, 4

Claims (1)

INSTALLATION FOR APPLICATION OF FILM COATINGS ON GRANULATED MATERIALS, comprising a housing with a cover, pipes for gas, liquid and coated granules, in which there is a gas supply unit, a collector of unused liquid, a granule spreader, a film liquid distributor installed in the cover in the form of a coaxially placed internal and external nozzles with separator rings mounted between them and a fluid damper with an upper perforated ring overlapping the annular section between the nozzles and a lower perforated ring located with a gap to the inner pipe, which has a disk-forming agent with a rounded top edge at its end, characterized in that, in order to improve the quality of the coating, the unit is equipped with a shell placed in parallel with the collector of unused liquid in the form a truncated cone from a woven mesh facing downward and a bottom p located between the top of the cone and the body, while the lower end of the outer pipe is made with a rounding parallel to the round to the edge of the film-forming disk opposite the latter, the separation rings are staggered relative to one of the nozzles, and the upper edges of their free ends are rounded.