CS224280B1 - Apparatus for moistening pulverulent materials with water vapour,especially in the manufacture of dried instant products - Google Patents

Description

The present invention relates to an apparatus for wetting water vapor of pulverulent materials in the production of instant (fast-dissolving dust-free granular) products.

The introduction of the production of instant products is one of the most important tasks of the food, chemical and pharmaceutical industries.

So far the most widespread is the so-called two-stage instantization process, in which the dry powder is re-humidified by water vapor coming from nozzles of different types located in the humidifier part of the instantaneous device. The wetted particles become sticky and agglomerate.

The agglomerates thus obtained have very good instant properties (i.e. wettability, permeability, descent, dispersibility and solubility) and the resulting product is dust-free.

It is moistened with saturated steam, which immediately after leaving the nozzle condenses in water mist and moisturizes the powder to be processed more quickly. In the food industry, these are always heat-sensitive materials where the use of superheated steam is out of the question, despite the technical difficulties in transporting it from the boiler to the humidifier nozzle, where there are usually long supply lines from the boiler room to the instantiser. steam.

The equipment used in operation is made of a straight or coiled pipe that has a number of small holes along its length through which wet steam or pipes with one row of inserted tubes (AO No. 186 471) emerge. The prior art nozzle types moisten the material falling in the form of a cloud of particles only in a narrow area, due to the collision of steam streams flowing out of the holes or nozzles arranged in a single row.

The above disadvantages are overcome by a device for wetting powdered materials

22428C according to the invention, wherein at least two rows of tubes are disposed perpendicularly to the longitudinal axis of the tubes so as to form a dampening region given by the intersection points of the free water vapor flows from the tubes. The tube is straight or coiled in a plane or space.

The novel effect achieved by the object of the invention is manifested by the fact that the particulate material is wetted in its path several times over its path. This new method of multiple dampening of the material makes it possible to use lower pressures of wet steam, that is to say of lower temperature steam, whereby the material is more gentle wetted and the resulting product is of higher quality because it is not so much thermally stressed. Another advantage is a more uniform wetting of the material, which then results in virtually the same size of all agglomerates formed and improved instant properties. It is also advantageous to reduce the sensitivity of the device to uneven dispensing.

In the accompanying drawing, an exemplary embodiment of a device for wetting powdered materials according to the invention is shown, in which Fig. 1 is a cross-section of a tube with tubes and Fig. 2 shows a part of a tube shell with three rows of tubes.

Perpendicular to the longitudinal axis of the tube 1 (Fig. 1j), three rows of tubes 2 are positioned so as to create a dampening region given by the intersections A, B, C of the free water vapor axis flowing from the tubes 2. In the vertical axis 4. the condensation water vapor 3 is connected to the pipes.

Claims (2)

SUBJECT OF THE INVENTION Apparatus for wetting powdered materials with water vapor, in particular in the manufacture of dried instant products, characterized in that at least two rows of tubes (2) are positioned perpendicular to the longitudinal axis of the tube (1) so as to form a wetting area given by the intersections (A) , (B), (C) the axis of the free water vapor flows from the tubes (2). Device according to claim 1, characterized in that the tube (1) is straight or twisted in a plane or space.