SU567653A1 - Air trough for fluent materials - Google Patents

Description

(54) AIRWAYS FOR BULK MATERIALS

one

The invention relates to the pneumatic conveying of bulk materials, in particular air chanels for granular materials®.

Airguns for bulk materials are known, containing a material conduit with loading and unloading nozzles, an air duct located under the material duct and connected to a source of compressed air, as well as an air-permeable porous bottom separating the material duct and air duct and having different air permeability ij.

The air injected into the air duct is filtered through the porous bottom and the layer of bulk material lying on it, which is loaded into the material duct from a bunker or some kind of conveying device. The upward air flow increases the porosity of the layer, the constant contact between adjacent particles is disturbed, as a result of which the internal friction in the layer decreases and the layer, like a liquid, spreads along the porous bottom. A layer in this state is called /. fluidized. I attach the porous bottom

slope in the direction of the desired movement of the material, as a result of which directional movement of the fluidized bed is provided, having some similarity with the flow of fluid in the channel.

The disadvantage of such an airgel is that when it is used to transport wet materials, or materials with increased friction between particles, particles stick together in large aggregates, and the filtration of air through the layer is accompanied by the formation of through channels of increased cross section, especially at the interface of the layer and walls airgun All this leads to increased air consumption during transportation of materials prone to sticking of particles and channeling in the air-dunnage, which, in turn, increases the power consumption of transportation and necessitates an increase in the size of devices for exhaust air.

The purpose of the invention is to reduce the consumption of compressed air.

Claims (1)

This goal is achieved by the fact that the gouge is provided with trunnions that are installed in epores with the ability to swing the gouge according to its longitudinal axis, and the air permeable porous bottom has a cross-shaped form in cross section, with the air permeability of the middle part of the bottom more than the air permeability of its side parts. , FIG. 1 is a schematic representation of the proposed wand; FIG. 2 - section A-A of FIG. 1, the cannel is in the starting position; in fig. 3 - the same, in the inclined position of the Airgel, has a material conduit 1 and an air duct 2, separated by a breathable porous bottom 3 of fabric. The porous bottom 3 has a trough-shaped form in cross section, while the middle part 4 of the porous bottom consists of a single-layer fabric, the hydraulic resistance of which, with a working filter, is equal to or slightly larger than the specific load on the partition wall, and the parts 5 and 6 consist of two layers of fabric, the air permeability of which is less than the air permeability of the fabric of the middle part 4. On top of the material, the material material 1 is closed with a fabric filter 7, for loading the material to be transported to the top s materialsshrovoda wall 1 there charging nozzle 8 performs a discharge through a discharge pipe 9. On the end walls there are coaxial chanels. pins JLO and 11 for swinging an air-piece against its longitudinal axis. The porous bottom 3 has a slope in the direction of the discharge port 9. The device operates as follows. The air supplied to the air duct 2 is filtered through the porous bottom 3 in the duct. 1, while the bulk material 12 entering the airgun is transferred to a fluidized state under the influence of an upward air flow. It moves along the porous bottom 3 to a stationary slope. Air escapes from the conduit through the fabric filter 7, while the dust particles removed from the layer by air are trapped by the filter. Passing along the entire length of the magnetic conduit 1, the material is discharged through pipe 9 (Fig. 1) from the nago. Oscillations are given to oscillations with respect to the axle axis of the axles 1O and 11, and in this case the aeroguns occupy the extreme position, as shown in FIG. 3, tilt in alternately in different directions. The quivers prevent channeling of the Pe material of the material; therefore, the actual filtration rate of the air through the bed and the total air flow rate are close to the calculated values. Due to the fact that the center of gravity of the trough and the layer of material are on the swing axis, the swing power consumption will be small. The trough-shaped form of the porous bottom 3 provides for the effect of the air flow on the main mass of the layer when the cross-section of the airbag is inclined, in addition, the particles in this case are subjected to air flow from the bottom and from the side, which contributes to the intensification of particle movements; and eliminated channelization. At the same time, the reduced air permeability of the porous partition on its lateral parts 5 6 prevents the breakthrough of air at the interface of the layer and walls of the gutter. The formula was invented for the Airgel for bulk materials, which contains a material pipe with loading and unloading pipes, an air duct located under the material pipeline and connected to inaccurate compressed air, as well as an air-permeable porous bottom that separates the material pipe and air duct and has different air permeability, in order to reduce the consumption of compressed air, the aerolab is provided with trunnions, which are installed in the supports with the possibility of swinging the aeroblock relative to its longitudinal axis. and a breathable porous bottom has a trough-shaped cross-sectional shape, with the average air permeability of the bottom is greater than the air permeability of its side portions. Sources of information taken into account in the examination: 1. USSR Author's Certificate No. 283О15, cl. B 65 G- 53/18, 197О. Air Material 9g.1