SU885128A1 - Apparatus for pneumatic feeding-out of loose materials - Google Patents

Description

(54) INSTALLATION FOR PNEUMATIC DISTRIBUTION OF BULK MATERIAL

one

The invention relates to pneumatic conveying of bulk materials, in part, to installations for the pneumatic distribution of bulk material.

It is known that this problem is solved mainly with the use of multi-position switches that change the direction of the flow of material during the transition from one receiving device to another (1).

The disadvantages of the known devices include the presence of an additional mechanical device (multi-position switch) in the installation scheme, the need for a feedback channel informing about the filling of the next receiver, and the need for a channel managed by this device.

These drawbacks are eliminated in installations that supply bulk material to each subsequent receiving device by overflowing the previous one.

A device for pneumatically dispensing bulk material is also known, comprising a fan, a device for loading bulk material into a transport pipeline, successively installed receiving hoppers and a dust collector (2.

However, this installation has a number of drawbacks. Thus, the material extraction Mecto is a complex bend in which the material being transported, when moving to the next receiver, changes direction twice in the direction of movement, which leads to an increase in pressure loss during transportation. In addition, with this method of selecting a material, dust, which always arises in the process of direct shipment due to abrasion of the material, is poorly separated from it. The presence of dust in some technological processes is undesirable, sometimes it should be separated and returned for recycling. For example, in the pool-cage fish households, the dust from the granular, falling into the water, almost completely disappears, because the fish does not notice it and does not betray.

The purpose of the invention is to reduce the pressure loss on transportation while improving the quality of the material loaded into each receiving hopper.

This goal is achieved by the fact that the inlet and outlet nozzles of each bunker are installed tangentially in its upper part and are located in the same plane tangent to the cylindrical surface of the hopper, and the axis of the inlet nozzle is offset relative to the axis of the output nozzle of the corresponding bunker along the movement of the material of the bunker.

In addition, the amount of displacement between the axes of the inlet and outlet nozzle is equal to the diameter of the outlet nozzle.

FIG. 1 shows a schematic installation, general view; in fig. 2 is a section A-A in FIG. one.

The installation contains a fan 1, a device 2 for loading bulk material into a transport pipeline 3, receiving hoppers 4, an inlet 5 of each of which is located below the outlet 6. A dust collector 7 is installed behind the last hopper 4.

The device works as follows.

The sluice gate of the device 2 feeds the raw material into the pipeline 3, to which it under the action of the overpressure created by the fan 1 moves in the direction of the receiving bins 1, where the bulk material moves under the action of the centrifugal force to the inside its own weight slides down. Since there is no movement of transporting air in the direction of the deposition of the material, the latter rushes with the pulverized fraction into the outlet nozzle 6, the displacement of which upwards relative to the inlet nozzle 5 prevents the large fraction from entering it during this period. Then, through the material conduit and through successive receiving bin-cyclones, air enters the dust collector 7. Upon filling the first bunker 4, the bulk material forms a channel in it that smoothly connects

the nozzles are inlet 5 and outlet 6, and moves to the next receiving hopper.

The proposed installation allows, distributing bulk material to the receiving devices, mind / body, the loss of air pressure for transportation and to separate the dust-like fraction from the material loaded into the bunker. The latter makes it possible to improve the parameters of the technological process in which such an installation is involved, or to reduce the losses of expensive bulk material, for example, feed in the pool-cage fish farms.

Claims (2)

1. Installation for pneumatic distribution of bulk material, comprising a fan, a device For loading bulk material into a transport pipeline, successively installed receiving hoppers and a dust collector, in order to reduce the pressure losses on transportation while improving the quality of the load into each receiving the material bunker, inlet and outlet nozzles of each bunker are installed tangentially in its upper part and are located in the same plane tangent to the cylindrical the surface of the bunker, and the axis of the inlet nozzle is offset relative to the axis of the outlet nozzle of the corresponding bunker, while the dust collector is connected to the outlet nozzle of the latter in the course of the movement of the hopper material. 2. Installation under item 1, characterized in that the magnitude of the offset between the axes of the inlet and outlet nozzles is equal to the diameter ru output pipe. Sources of information taken into account in the examination 1. Zuev F. G. Pneumatic transportation at grain processing plants. M., 1976, p. 299-300. 2. USSR author's certificate No. 309075, cl. B 65 G 53/12, 1967 (prototype).