SU755729A1 - Aeration-vortex feeder - Google Patents

Description

The invention relates to pneumatic transport and can be used in various industries for the controlled supply of bulk materials, for example in the energy sector when applying dust-like fuel.

The aeration feeder is known, which contains a cylindrical aeration chamber with an outlet, a gas distribution grid and an air chamber [11 The disadvantage of this feeder is that the gas distribution grid is clogged with the material over time, which violates the stability of the material fluidization process.

Also known aeration-vortex feeder containing aeration chamber with a conical perforated bottom, in the central part of which there is a discharge pipe, an air chamber fixed under the aeration chamber, and a device controlling the release of material, the rotary element of which is located in the aeration chamber vertically and coaxially with the discharge pipe and made in the form of a hollow cylindrical body of rotation with holes in the side wall, communicating

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in the process of unloading the material, the cavity of the aeration chamber with the cavity of the discharge pipe [2].

A disadvantage of this feeder is also instability fluidized process Nia ₅ and as a result, clogging of the holes of the rotary member neproaerirovannogo pieces of material, which reduces the efficiency of the unloading process and the reliability of the feeder. In addition, there is no device in the feeder that prevents large pieces and foreign objects from falling into the aeration chamber, the presence of which in the aeration chamber also leads to a breach of the stability of the fluidization process and clogging of the rotary holes.

an item.

¹⁵ The purpose of the invention is to improve the efficiency of the unloading process and the reliability of the feeder.

This goal is achieved by the fact that the bottom of the feeder is perforated with horizontal holes and above it a leveling air pressure net is mounted with a barrier ring fixed in its central part, in the hole of which the aforementioned rotary

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the element, while the upper end of the latter is plugged, the holes in the side wall of the rotary element are made above the ring, and the inlet end of the discharge pipe is located inside the rotary element and has holes that coincide with the holes in the side wall of this element.

In addition, a classification grid is installed above the rotary element in the aeration chamber, and the holes in the side wall of the rotary element and at the inlet end of the discharge pipe are inclined in ₁₀ directions of material flow.

The drawing shows schematically an aeration-vortex feeder, a general view.

The feeder 1 comprises an aeration chamber, wherein the set classifying grating 2. The bottom of the chamber 1 ¹⁵ pri- CREPLA aeration air chamber 3. The chamber has a perforated conical bottom 4, along the axis of which is mounted the discharge nozzle 5. At the inlet end of the nozzle 5 is swivel element 6 PE device ₂₀ regulates the release material. Above the bottom 4, a leveling air pressure grid 7 is fixed with a barrier ring 8 in its center.

The bottom 4 is perforated with holes a, ^{15 of the} axis of which are located at different angles (not shown) to the surface of the cone. In the side cylindrical wall of the rotating element biv wall of the nozzle 5 above the ring 8 are made combined when unloading the material of the hole b, having a slope in the direction of the flow of material.

The rotation of the element 6 is carried out from the drive using gear 9.

Aeration-vortex feeder works as follows. 31

From above through the classifying grating 2, which retained the large pieces of material and foreign objects, material enters the aeration chamber 1, where the process air of fluidization of material ⁴⁰ coming from Airforce hydrochloric chamber 3, converted into 4 perforated bottom of the vortex flow and evenly distributed in the chamber aeration leveling grid 7.

The swirling motion of the air April ₅ schaet prevent settling of material on the grid 7 and the bottom 4, in rezulrtate'shego occurs stable fluidization of the material.

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The ring 8 prevents direct penetration of aerating air into the discharge pipe 5. The fluidized material flows through the holes b into the pipe 5 and further to the destination with a capacity controlled by the mutual arrangement of the holes due to the angle of rotation of the elements 6.

Claims (2)

Claim 1. Aeration-vortex feeder containing aeration chamber with a conical perforated bottom, in the central part of which a discharge pipe is installed, an air chamber fixed under the aeration chamber and a device controlling the release of material, the rotating element of which is located in the aeration chamber vertically and coaxially with the discharge pipe and made in the form of a hollow cylindrical body of rotation with holes in the side wall, communicating in the process of unloading the material cavity of the aeration chamber with the cavity of the discharge pa Felling, characterized in that, in order to increase the efficiency of the unloading process and reliability, the bottom is perforated with horizontal holes and an equalizing air pressure net is mounted above it with a barrier ring fixed in its central part, in the hole of which the aforementioned rotating element is installed, with the upper end the latter is plugged, the holes in the side wall of the rotating element are made above the ring, and the input end of the discharge pipe is placed inside the rotating element and having m openings coinciding with openings in the side wall of the element. 2. Feeder on π. 1, characterized in that a classification grid is installed above the rotating element in the aeration chamber, and the holes in the side wall of the rotating element and in the inlet end of the discharge pipe are inclined in the direction of material flow.