DD137327B1 - DEVICE FOR HYDROPHOBISING PRILLS AND GRANULES - Google Patents

Description

Oil device for hydrophobizing prills and granules

Field of application of the invention:

The invention relates to a device for hydrophobizing prills and granules, in particular fertilizers.

Characteristic of the known technical solutions ;

There are a variety of mixing devices and devices for applying liquids to solids known.

Known mixing devices allow the mixture of at least two substances of the same state of aggregation, as shown for example in OS 24 16 628. Other devices for spraying liquids work with rotating distributor units (OS 1 667 071).

U.S. Patent No. 3,879,021 discloses a device for applying liquids to solids in which spraying is carried out vertically in free fall of the solid product stream without any guiding means.

In addition, devices are known in which there is a mixing of liquids, powders and pesticides in rotating drums or containers.

The known devices have significant disadvantages in their application to

Thus, in most known devices mixing of the media is achieved only by rotating parts of the device, which are energy-consuming and require a high technical effort · In addition, the rotating parts are subject to high wear.

The application of liquids which change to the solid state below a certain temperature, for example below 30 to 40 ° C, to pesticides in rotating drums and in the open air without conducting means does not result in a substantial part of the surface of the pesticides to be sprayed is wetted with the liquid.

In addition, known devices can cause caking on the boundary surfaces of the devices, which severely restrict the punctuality of these devices.

Most known devices require a high technical effort with very high precision required and a large amount of space · The flow and fall speed in known devices is not substantially varied by means of directors.

Object of the invention ^

The aim of the invention is to provide a device for hydrophobizing prills and granules, in particular of fertilizers, with which a high degree of wetting for the bulk material to be hydrophobized is to be achieved.

On the other hand, the device should be characterized by a low technical and energy costs and a small footprint.

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The invention has for its object to provide a technically simple device without rotating parts for spraying liquids on prills and granules, especially to find fertilizer. The object is achieved according to the invention with a device consisting of a downwardly conical cylindrical chamber in the Cylindrical distributor tubes are arranged below a pre-pressure space. The cylindrical distributor tubes have thread-shaped guide devices. At the outer diameter of the cylindrical chamber nozzle rings are attached. In two further embodiments, it is possible in addition to arrange a central bolt, which is also equipped with nozzle rings, in the cylindrical chamber and / or in the cylindrical manifold.

At a variable distance from the upper end of the device is an intermediate bottom for receiving at least 2, preferably 4-12 cylindrical distribution pipes, depending on applied Hydrophobierun gs with te l "" and product quantity to be moistened ·

The space between the upper end of the proper device to the intermediate bottom is used to adjust the form and therefore to vary the flow velocity of the wetted solids prior to distribution of the product flow in the cylindrical manifolds · Thus, the flow or falling speed of the product to be crosslinked with a liquid product flow to vary. In order to create the condition that a substantial part of the surface of the product stream can be wetted, takes place in the distribution pipes, a swirling of the solid product by mounted inside the distributor pipes thread-shaped guide means for slow flow velocities 1 to 10, preferably 1 to 4 threads and For larger flow rates, 0.3 to 1 thread at a pitch angle of 20 to 170 °, preferably 30 to 160 ° have.

In another embodiment of the device according to the invention a centered bolt is mounted between the manifold wall to limit the product flow in the middle.

Ler with a swirling motion emerging from the distributor tube product flow is wetted with the nozzle openings, which are located below the ends of the distribution pipes in spaced staggered Dtlsenringen on the inner wall of the device emerging hydrophobing liquid, such that the Spruhkegel from the liquid nozzle tangentially and At an angle of 30 ° to 160 ° to the vertical of the flowing product stream is formed by appropriate arrangement of the nozzles · By Duper rings arranged offset to the vertical of the swirling motion in eotation located pest substance is largely provided on веіпег entire surface with wetting agent »Another embodiment the device according to the invention allows the additional sprinkling of liquids on the product flow from the inside to the outside by means of a central tube which is present in the longitudinal axis of the device and at the height of which At least one nozzle ring for spraying the liquid is located at the ends of the distributor pipes.

The device according to the invention has at the upper end opposite the feed point of the product to be wetted an increase of the boundary surface of the device for better discharge of the product stream and at the lower end a conical enlargement or narrowing for better delivery of the liquid-wetted product stream.

To prevent caking of the product on the boundary surfaces of the device and to the

Distribution pipes whose surfaces can be provided with surface treatment agents, such as plastic resins and silicone rubber.

Exe cutive game

The invention will be explained in more detail below by way of example:

In the pictures mean:

Figure 1 Longitudinal section of the device Figure 2 Cross-section of the device Figure 3 Cylindrical manifold

Figure 4 Cylindrical manifold with central bolt Figure 5 longitudinal section of the cylindrical chamber with central bolt

The product stream passes into the device in which the space controlling the admission pressure 2, a division of the flow, fertilizer granules, on the 4 cylindrical distribution pipes 3 takes place. By the thread-shaped guide devices 4 the product flow is associated with a swirling motion. The liquid is sprayed, molten hydrophobing agent, via the nozzle rings 5. Due to the rotational movement of the solids, essentially complete wetting of the surface of the solids takes place due to the nozzle rings 5 arranged offset downwards.

The hydrophobized product is removed at the lower end of the expanding or narrowing device for further use

 The variant shown in FIG. 5 shows an additional wetting of the pest substance from the inside to the outside, since Dlisen rings 5 are arranged on the central bolt 6.

The device according to the invention does not require any great technical effort, since there are no rotating parts of the device which are subject to great wear.

Due to the eotation of the product stream generated by the swirling motion, substantially the entire surface of the solid is wetted with liquid. At the same time, the falling and flow rate of the product flow can be varied by the form above the intermediate plate generated via the distributor pipes and thus promotes the increase of the degree of wetting of the bulk material. The energy required for rotating parts in known devices is eliminated in the inventive solution. Caking of the product is avoided by surface treatment of the boundary surfaces.

The space required for the device according to the invention is low.

Claims (1)

Apparatus for hydrophobizing prills and granules, in particular fertilizers, characterized in that distributor pipes (3) are provided in a device comprising a cylindrical chamber (1), which is conically widened or constricted downwards and whose outer diameter is equipped with dihedral rings (5) In addition, a central pin (6,7), which is also equipped with Diisenringen (5), in the cylindrical chamber (1) and / or in the cylindrical manifold (3 ) can be attached For this _ ..: l pages drawings