SU1248910A1 - Chamber feeder of pneumatic transportation installation - Google Patents

Description

The invention relates to pneumatic conveying devices for bulk materials and can be used, for example, to transfer raw meal from raw mills to mixing silos, from mixing silos to consumables, in feed systems for raw meal of heat exchangers of rotary kilns at cement plants, and also in construction, | pinozem and other industries.

The aim of the invention is to increase reliability and performance.

FIG. 1 shows the installation, general view; in fig. 2 and 3 - section A-A (variants) in FIG. one.

The chamber feeder includes a vertically installed container 1 with a shut-off device 2, a loading window 3 and a mixing chamber 4 with an aeration device 5, pipelines 6 disposed in tank I, air collector 7, individual air ducts with valves, liter 8 and 9, nozzles 10 communicated with a source of compressed air.

For each material line 6 there is an air duct system, VC. 1uchuchaus duct 11, shut-off valves 8 and the nozzle 10.

The dimensional feeder works in the following way.

The powdery bulk material from cfviKOCTH 1 through the loading window 3 when the locking device 2 is open enters the mixing chamber 4, where it is well aerated with compressed air that flows through the aeration device 5.

The prepared air / material mixture under the action of overpressure and compressed air energy coming from the collector 7 through the valves 8 and the nozzle 10 is carried from the mixing chamber 4 to the material pipes b and then to the receiving points (em. Or directly into the cyclone heat exchangers of the rotary furnaces). (Compressed air for aeration of the ponge-shaped material under the aerating device 5 comes from the common air collector 7 through the valve 9.

Aa

/ -nibs ftexi // coSou (Pui 2 I. -ffepaSHt / ffeiff (} (/ coffou

Thus, the compressed air in the chamber feeder is fed through nozzles 10 individually to each material conduit 6, accelerated by ejection of the entry of the material and air mixture into the material lines 6, as well as under the aerating device 5 of the mixing chamber 4, to aerate the powdered material in it.

The installation can be equipped with two or more transport pipelines (Fig. 2 and 3).

When operating the installation with a smaller number of material pipelines, the rest should be blocked by vents in the immediate vicinity of the mixing chamber.

Given the limits of ratios of 0.8-1.0 obtained

A 0.3 -0.35 if-

experimentally and are optimal.

1. D

With respect to 3 significantly worsening

The collection of powdered material into the pipeline due to the ejection hazard due to closely located sections of the pipelines is carried out.

R

An increase of 0.35 is impractical.

as this will lead to an unreasonable increase in the size of the installation.

Ratio-t-0,8-0-0,1 established

and max.

Based on the fact that during normal operation of the pneumatic conveying installation, the performance of the material pipeline should vary in proportion to its cross-sectional area, where B ,, is the distance between the pipelines, from the materials of the wires to the vessel walls;

D is the diameter of the tank;

d ,, is the diameter of the material pipeline;

n is the number of pipelines. Aa

VNIIPI Order 4186/19 GPR branch “Patent, g

Circulation 833 Uzhgorod, st.

Subscription Project, 4

Claims (1)

CHAMBER FEEDER OF AN AIR-TRANSPORT INSTALLATION, comprising a vertically mounted container with a loading window and an aeration device in its upper and lower parts, respectively installed inside the container above the aeration device, material pipelines with intake sections and an air duct with a tip for supplying compressed air, characterized in that, in order to increase reliability and performance, it is equipped with additional air ducts, each made with an adjustment valve and a tip directed in the intake section of the corresponding material pipeline, while the centers of the intake sections of the material pipes are placed at a distance from the inner walls of the container and between themselves, equal to 0.3-0.35 of the internal diameter of the container, and the ratio of the diameters located next to the intake sections of the material pipes is selected within 0, 8-1.0. figs?