DE1254946B - Cyclone for separating fine dust that can be agglomerated - Google Patents

Description

Cyclone for separating agglomerable fine dust The invention refers to a cyclone for the separation of dispersed in air or gases, agglomerable fine solid particles such as pigment powder having a grain size below 2 microns, the cell jacket of which is made of thin flexible sieve material, in particular made of synthetic fiber fabric or perforated synthetic resin film, on the ceiling of the Separator housing is attached and at the lower end a central, in the collecting space Has the housing opening out material discharge opening.

Cyclone cells of this type are used to separate the small particles used by large particles or to separate solid particles from the Carrier air. In the latter case, the meshes or holes of the sieve walls are so small that that they are impermeable to the solid particles. The sieve cyclone cells are at its lower outlet end to a pipe od. Like. Attached.

Since the fine particulate matter, e.g. B. Pigments, for agglomeration tend, the meshes and holes of the sieve walls of the cyclone cells settle after a short time Time to. The incrustation can only be periodic by mechanical deformation of the walls be made to jump off. At the moment when the attachment layers come off strong disturbances of the vertebral depression in the cyclone occur, which affect the degree of separation adversely affect.

It is known from cyclone electric dust collectors at some distance from the inner container wall a larger number of oscillating wires in the way to arrange that between the wires and the housing wall a collecting space for the suspended particles that have got into it is formed. The vibrating wires are on the one hand on the ceiling of the cyclone container and on the other hand on a screening funnel, the extends into the lower part of the container, attached. Form the vibrating wires just a partition with more or less wide longitudinal slots, which are fine Solid particles has an incomparably poorer degree of separation than that known bag-like sieve inserts. Such a partition is only in connection useful with an electrostatic precipitator.

It has now been found that encrustation of the sieve surfaces of the cell jacket is prevented with certainty and equipped with an electrostatic device is superfluous if, according to the invention, the cyclone cell jacket like a sack in its hangs freely movable over its entire length from the ceiling of the separator housing and as a result of the mesh or hole size provided accordingly of the sieve material for Agglomerates of solid particles is permeable.

The cell jacket becomes automatic under the influence of the flow set in vibrating or pulsating motion.

This ensures that when there is a tangential flow against the dust-laden Gas against the inner wall of the permeable for dust agglomerates vibrating sieve cyclone cell jacket the suspended particles as a result of the turbulent flow disturbances generated here Agglomeration are stimulated and precipitate in a granulated state from the carrier air. The grain size of the material, which is decisive for the separation in the cyclone, is therefore changed. In addition, since the sack-like sieve insert (cyclone cell jacket) is under the influence of the Gas flow and the powder undergoes a pulsating deformation and in the solid cyclone container can flutter freely, the dust particles are deprived of any opportunity to settle and thus prevents clogging of the sieve holes or sieve meshes.

The dispersion is partly separated on the inside the sack-like cyclone cell, as the grain size of the suspended particles that tend to agglomerate on the screen surface that vibrates or flutters under the influence of the current the cyclone cell is enlarged. Part of the suspended particles and also the agglomerates enters with a partial flow of the carrier air through the sieve openings and falls outside of the cyclone cell jacket in the cyclone container downwards.

Several cyclone cells can be used in the known multi-cyclone design be installed in parallel in a common container.

The distance between the container jacket and the cell jacket is chosen so that that through the sieve-like Cell mantle only exiting particles still reach the container wall at low speed, so that here a Impact and caking is avoided.

The drawing shows an embodiment of the subject matter of the invention shown schematically.

F i g. 1 shows a longitudinal section through the cyclone with a suspended one Sieve cell jacket; F i g. 2 shows a cross section through the cyclone according to the line A-B of FIG. 1 represents.

It means 1 the outer cyclone tank, 2 the inlet port of the Cyclones, 3 the inner insert nozzle for the sieve cell jacket 4. At 5 that is central clean gas outlet pipe, with 6 the calming chamber and with 7 a rotary valve designated for the removal of the rejected solid material.

At the lower end of the sieve cell jacket 4 is a discharge opening 8 provided.

Claims (1)

Claim: Cyclone for the separation of dispersed in air or gases, agglomerable fine Solid particles such as pigment powder with a grain size below 2 microns, the cell jacket of which is made of thin flexible sieve material, in particular made of synthetic fiber fabric or perforated synthetic resin film, on the ceiling of the Separator housing is attached and at the lower end a central, in the collecting space of the housing has the discharge opening opening out, d u r c h e k e nnz ei chn et that the sieve-like cyclone cell jacket (4) like a sack in its entire length hangs freely movable from the ceiling of the separator housing (1) and as a result of the Corresponding mesh or hole size of the sieve material for agglomerates the solid particles are permeable. Publications considered: German Patent Specifications No. 562 893, 597 314, 642 547, 707 893; French Patent No. 456 316; U.S. Patents No. 526 334, 802 651, 940 827.