SU1680245A1 - Rotary film-type apparatus for separating dry matter from solutions - Google Patents

Description

The invention relates to chemical engineering and can be used in the chemical, food, microbiological. The invention relates to chemical engineering and can be used in the chemical, food, microbiological industry to obtain dry substances from solutions.

The purpose of the invention is to increase the productivity of the apparatus and improve the quality of the dried product.

FIG. 1 shows the apparatus, a general view; in fig. 2 - the same cross section; in fig. 3 is a view A of FIG. one.

The rotor film apparatus consists of a vertical cylindrical body 1 with a heating jacket 2, a separator 3, and a large-scale industry for obtaining solids from solutions. The purpose of the invention is to increase the productivity of the apparatus and improve the quality of the dried product. The rotor film apparatus for the production of dry substances includes a vertical cylindrical body with a heating jacket, a separator, a rotor with suspensions and an emphasis, scrapers and blades hinged on the suspensions and blades connected in pairs with a bottom inclined to the blade. In the scrapers, directed by the working edge in the direction of the rotor rotation, there are windows for driving the product. Each downstream pair of scraper-blade is offset relative to the upstream in the direction of rotation of the rotor so that the lower edge of the window of the upstream scraper coincides in height with the upper edge of the window of the upstream scraper. 1 hp f-ly, 3 ill.

torus 4 with suspensions 5 and an emphasis 6. pivotally fixed on the suspensions scrapers 7 and blades 8 connected in pairs inclined to the blade 8 in pairs by the bottom 9 of the branch pipes 10 and outlet 11 of the processed product, feed 12 and outlet 13 of the heat carrier and outlet 14 vapor. In the scrapers 7, directed by the working edge in the direction of rotation of the rhtor 4, windows 15 are made for moving the product.

Rotary film machine works

in the following way.

Through the pipe 10, the solution of the processed product enters the apparatus and 1680245 A1

3

1680245

four

with patches 8 fixed on the rotor 4 through suspensions 5 with an emphasis 6, it is applied (when the rotor rotates) to the wall of the housing 1. The heat carrier is fed into the heating jacket 2 through the nozzle 12 and is removed through the nozzle 13. The vapors formed during the evaporation of the solution are discharged through the separator 3 and nozzle 14. The solution is removed by the scraper 7 and, passing through the window 15, is intensively mixed, which is especially effective when the viscosity of the product increases as the solvent evaporates.

On a certain part of the housing 1, the solution is evaporated until a paste is formed. The latter is cut by the scraper 7 and through the window 15 enters the cavity formed by the scraper 7, the spatula 8 and the bottom 9. The paste is displaced along the inclined bottom to the scapula and is applied to the wall of the housing 1 at the level of the window 15 of the downstream scraper 7, Offset of the downstream scraper-scraper pair in the direction of rotation of the rotor 4 allows, firstly, to catch the paste particles that were not for any reason in the window 15 of the upstream

'scraper, into the cavity of the underlying scraper-blade and the bottom; secondly, since the lower edge of the window 15 of the upstream scraper 7 coincides in height With the upper edge of the window 15 of the downstream scraper 7, a "dead" strip on the wall of the housing 1 cannot form, which no scrapers scrape off the paste.

The movement of the scraper 7 on the housing 1 is limited by the stop 6 and when the rotor 4 rotates without supplying the product, the gap between the working edge of the scraper 7 and the housing 1 is, for example, 0.5-1 mm. For a better distribution of the product, the blade 8 is bent.

The residence time of the paste on the wall of the housing 1 after it is applied by the spatula 8 of the upstream pair and before being cut by the scraper 7 of the downstream pair is equal to

2n —φ

ω

where t is the residence time of the paste on the wall of the shell, s;

φ is the angle between the downstream

scraper and overhead shovel,

glad;

w - angular speed of rotation of the rotor, rad / s.

Thus, the paste is applied with an overblade paddle 8, cut off downstream and advancing to the nozzle 11 of the dry product outlet.

. Each particle of paste resides on the heat-exchanging surface of the body at the same time. The dried product has a residual moisture, the same for all particles of the product, which improves the quality of drying.

The productivity of the apparatus also increases due to a decrease in the zone of paste drying. In this case, the entire surface of the apparatus is uniformly loaded.

Claims (2)

Claim 1. Rotary film apparatus for the production of dry substances, containing a vertical cylindrical body with a heating jacket, a separator, a rotor with pendants placed at its height, made in the form of vertical plates with an emphasis, and hinged in pairs on each floor scraper with windows and with a working edge directed in the direction of rotation of the rotor, and the blade, the upper edges of which are placed on the same level, the nozzles of the supply and removal of the processed product, coolant and vapor recovery, characterized in that, in order to increase In order to improve the performance of the device and improve the quality of the dried product, each pair of scraper-blade is equipped with an inclined bottom attached to their lower edges, and the length of the outer edge of the blade is longer than the outer edge of the scraper. 2. The apparatus according to claim 1, characterized in that each downstream pair of scraper-blade is set offset in the direction of rotation relative to the upstream pair, while the lower edge of the window of the upstream scraper is installed at the same height as the upper edge of the window of the downstream scraper. 1680245 FIG. one