DD139994A1 - APPARATUS FOR REMOVING TOOTH FLUIDS OF ROTATING MOUNTING PARTS - Google Patents

Abstract

This involves equipment in the chemical, pharmaceutical, and food industries in which viscous media are present as thin layers on rotating components to carry out reactions. The invention solves the problem of removing the viscous medium from the rotating component at a predefined, fixed point in order to maintain narrow residence time spectra and guarantee appropriate product qualities. This prevents product from being thrown off over the entire circumference of the rotating component. To remove the viscous product from rotating film-forming components, the invention proposes providing an angular structural element at one or more predefined points on the outer circumference of the rotating component with a preferably horizontal edge to the plane of rotation below the outer peripheral edge of the rotating component and with an edge inclined at an angle of 0° to 70° to the axis of rotation opposite to the direction of rotation and projecting upwards beyond the peripheral edge of the rotating component.

Description

Device for removing viscous fluids from rotating components

Field of application of the invention

The invention relates to equipment of the chemical, pharmaceutical and food industries in which liquid media predominantly have high viscosity as a thin layer on rotating components for carrying out reactions or degassing. These rotating components can be disks, cones, truncated cones or even rings. in which due to the rotation, the liquid feed product moves as a thin layer to the outer rotational edge. There must now be a need for the liquid to flow away from the respective rotating fixture.

Characteristic of the known technical solutions

Devices are known for rapidly expelling gaseous components from liquids, in which "the liquid medium flows from the inside to the outside via rotating disks under the influence of the centrifugal force which occurs." The product forms a thin film on the disks which is favorable for the degassing process provides conditions. Since the disks are arranged one above the other on a vertical shaft, it is necessary that the object product is fed from the outer zone of the upper disc in the vicinity of the rotation axis of the underlying disc. For this purpose, v / ill with the aid of wipers, which rest on the discs and do not rotate, the liquid removed from the rotating insert and

directed to the lower disk »'

The wipers must lie resiliently directly on the disc surface so that the entire product is wiped off. Otherwise, any remaining product on the disc would be thrown outwards due to centrifugal force and thus be lost to the selected process flow. "By choosing wipers for product removal, the entire surface of the rotating discs can never be used as the film surface. Thus, in this way of product removal, the full installed disk surface can never be used as a film and thus mass transfer surface *

In other equipment for creating large product surfaces in the form of liquid films, unlike the previously described apparatus, one product sump is associated with each rotating assembly system. In WP 79151, a bottom and top open rotating truncated cone is used to form film from a product sump, returning to liquid delivery Direction swamp additionally a rotating truncated cone is arranged with opposite directed inclination. The viscous product is now thrown outwards due to the centrifugal force radially above the sump level and flows back from the reactor wall into the actual product sump. Thus, a liquid ring forms on the reactor inner wall above the sump surface. With highly viscous product sticks this with unimpaired Verv / eilzeit at least in the near-wall thin layer and is thus particularly exposed to the temperature of the heated reactor wall. A disadvantage of viscous melt so uncontrollable product flow and thus the uninfluenced retention time extension on the quality of the final product noticeable »

Object of the invention

The aim of the invention is to realize a device which allows, without great additional technical effort, viscous product of rotating components to be prescribed locally.

- 3 - 2 09 145

dissipate baren and locally strong localized points and thereby avoid product spilling from the rotating mounting part to the outside. At the same time, it must be ensured as a particular advantage that this does not reduce the realizable film surface area compared with the installed surface of the rotating components. By using the invention it should be possible to reduce the total circumference without reducing the pilot surface on the rotating internals which is decisive for the process of the rotating body free of thrown off product ·

Explanation of the essence of the invention

The technical object to be solved by the invention is to avoid the centrifuging of viscous product from rotating film-forming components and to remove the viscous product from the rotating components without reducing the liquid surface on the surface of the rotating body of these. Thus, with optimum utilization of the mass transfer surface to improve the quality of the final product, the residence time spectrum of the viscous product could be appreciably restricted ·

To realize the inventive concept, an angled construction element with a preferably horizontal edge to the plane of rotation below the outer peripheral edge of the rotating part and with an angle of 0 ° to 70 ° to the rotation axis at one or more predetermined locations of the outer circumference of the rotating insert the direction of rotation inclined and over the peripheral edge of the rotating part upwardly projecting edge fixedly mounted. Depending on the viscosity of the liquid and depending on the circumferential speed of the rotating part, the distance between this angled construction element is 1 to 50 mm to the peripheral edge of the rotating part.

As is well known, an edge bead forms prior to the centrifuging of viscous product at the outer peripheral edge of rotating hardware. The angled construction element brushes

'. - 4 - 209 145

Now this edge bead off and leads it due to its inclination in the underlying product sump ♦ lia.ch the passing of the construction element must therefore build up again by the centrifugal force this edge bead before the risk of Produktabschleuderns arises. Depending on the peripheral speed of the rotating part and on the viscosity of the liquid product, the resorption of the edge bead can take up to one complete revolution. Thus, a larger peripheral portion of spun-off product is kept on each pail without the formation of film on the surface of the rotating body Influence is taken »

-s 209 145

embodiments

Bs show

Fig. 1 - Rotating logs with angled construction element

Fig. 2 - Figure 1 in plan view

Fig. 3 - Product guide in a reactor stage without angled construction element

Fig. 4 - Product guide in a reactor stage with angled construction element

Fig. 5 - Product guide in a reactor stage with annular design element

example 1

As a rotating reactor installation, a rotating disk 1 is selected as an example in FIG. 1, the outer edge of the disk 1 moving past a fixedly mounted angled construction element 2 at a predetermined point. This angled construction element has to product from the edge of the disc perpendicular to the disc plane or inclined against the direction of rotation edge 4 and a reaching below the disc 1 and parallel to the disc surface edge 3 · These relationships are shown in Figure 2 in plan view.

Example 2

As an exemplary embodiment, 6,100 kg / h of polyester melt were degassed in a conical reactor with the inner cone 5 and the outer cone 6. The outer cone has a peripheral speed of 4.84 m / s. The product stream 7 takes the course shown in Figure 3, d. H. The product thrown off from the outer cone strikes the reactor wall 8 and runs into the sump 9.

In order to shorten the transport path and to realize the principle of forced delivery, a spin-off of the outer cone 6 is to be prevented. "For this purpose, three construction elements 2 * according to the invention (FIG. 4) were offset by -120 ° on the circumference

attached, the horizontal edges are 35 mm and their vertical edges are 10 mm away from the edge of the cone 6. The inclination in the tangential direction "is 15 ^ against the vertical j the product is not thrown off, but flows' as a closed product stream 11 directly from the construction element 2 into the sump 3 *

Example 3

For the same task as in example 2, the order is. preventing the product from being deflected from the outer cone 6 su, three construction-ring-shaped construction elements 12 (FIG. 5 _c ) mounted offset by 120 ° on the circumference.

Each inner arc has a radius of .100 mm. The vertical tangent of the circular arc is 17 mm outside the edge of the outer cone 6, the horizontal tangent of the circular arc is 66 mm below the edge of the outer cone, the inclination of the construction element 12 against the tangent of the outer cone 6 is 15 to the vertical "Also in this In this case, the product is not thrown against the reactor wall 8, but flows as a closed product stream 11 directly from the construction element 12 into the sump 9.

Claims (1)

claim Device for taking tough liquids from rotating components such. B. rotating discs, cones, truncated cones or rings at predetermined localized locations to Prutduktabschieudern over a larger peripheral area to prevent, characterized in that at one or more predetermined locations of the outer periphery of a rotating mounting part (1) an angled construction element (2) with an edge (3) preferably horizontal to the plane of rotation below the outer peripheral edge of the rotating insert part and an edge (4) inclined at an angle of 0 ° to 70 ° to the rotation axis opposite to the direction of rotation and projecting upwards beyond the peripheral edge of the rotating insert part Distance of 1 to 50 mm to the peripheral edge of the rotating part is firmly mounted. Dazu_JLSeiien drawings