RU169472U1 - DEVICE FOR LIFTING BULK MATERIALS WITH INCREASED CONCENTRATION IN A GAS MIXTURE - Google Patents

Abstract

The device relates to a pipeline transport of bulk materials, namely pneumatic lifting devices with inclined from the vertical pipelines with a high concentration of bulk materials in the gas mixture. The device for lifting bulk materials with a high concentration in the gas mixture contains a mixing chamber, a pipe for supplying compressed gas, a porous gas distribution partition and pipeline. The pipeline is equipped with sections inclined from the vertical into which transverse inserts in the form of gratings are dispersedly installed in them. The gratings of the inserts are provided with crescent-shaped cutouts for creating crescent-shaped slit through holes expanding towards the lower inner wall of the pipeline. The technical result of the development is to increase the throughput, reduce the energy consumption for transportation in pipelines tilted from the vertical, and increase the reliability of the device. 2 ill.

Description

The device relates to a pipeline transport of bulk materials, namely, pneumatic lifting devices with inclined from the vertical pipelines with an increased concentration of bulk materials in the gas mixture.

A device for lifting bulk materials with a high concentration in a gas mixture, comprising a mixing chamber, a nozzle for supplying compressed gas, a porous gas distribution baffle and a pipeline with sections inclined from the vertical, equipped with dispersed transverse inserts installed in them with through holes (Patent RU No. 2194661, published on December 20, 2002. Authors: Davydov S.Ya., Rukomoykin AA, Ponomarev AV).

In pipelines inclined from the vertical with inserts, the transported material, moving in cramped conditions, is pressed against a gentle lower wall and slides along it. In this case, the friction forces of the material movement increase as the slope of the pipeline increases from the vertical, which affects the increase in energy consumption and wear of the pipeline. There is a delamination of particles of material and air flow with bubbles above them. Deviation from the vertical leads to an increase in the intensity of occurrence of gas bubbles, which violates the regime of movement of the material in a continuous stream. This leads to a decrease in productivity and to a decrease in the efficiency of pneumatic transport.

It is also known a device for lifting bulk materials with a high concentration in the gas mixture, containing a mixing chamber, a nozzle for supplying compressed gas, a porous gas distribution partition and a pipeline with sections inclined from the vertical, provided with dispersed cross-sections installed in them with through holes installed with the possibility of obstruction the movement of material along the bottom wall of the pipeline (Patent RU 2294886, publ. 03/10/2007. Author - Davydov S.Ya.).

Dead spots are created at the installation sites of the transverse gratings, which on the lower walls of the inclined sections of the pipeline create resistance for the movement of particles of bulk material, which reduces the throughput of the entire pipeline. In the process of blocking inclined sections of the pipeline (in emergency situations) with bulk material in dead zones, the purge process slows down.

The development objective is to increase throughput, reduce energy consumption for transportation in the presence of piping tilted from the vertical, and increase the reliability of the device.

This object is achieved in that in a device for lifting bulk materials with a high concentration in a gas mixture containing a mixing chamber, a nozzle for supplying compressed gas, a porous gas distribution partition and a pipeline with sections inclined from the vertical, provided with transversely distributed transverse inserts with through holes installed with the possibility of obstructing the movement of material along the bottom wall of the pipeline, the transverse inserts are provided with crescent-shaped cutouts for creating sickle slotted through holes, expanding towards the lower inner wall of the pipeline.

In FIG. 1 shows the proposed device; in FIG. 2 is a view A in FIG. one.

The device (Fig. 1) for pneumatic transportation of bulk materials contains a mixing chamber 1 with a vertical transport pipe 2. In the lower part of the mixing chamber, nozzles 3 for supplying compressed air and a porous gas distribution wall 4. are installed in the transport pipe 2, transverse inserts are dispersed along its height. 5 in the form of gratings or grids. The feed part 6 of the mixing chamber 1 is located above the branch pipe of the transport pipe 2. The vertical pipe 2 is provided with sections 7. The gratings of the inserts 5 are provided with crescent-shaped cutouts 8 for creating crescent-shaped slotted through holes 8, expanding towards the bottom inner wall 9 of the pipeline in front of the edge 10 bars 5.

Bulk material from the feed part continuously enters the mixing chamber 1. Compressed gas is supplied through the porous partition 4 under the material layer. After passing through the porous septum 4, gas flows, acting on the material, aerate it to a fluidized (boiling) state. Under the action of excessive gas pressure in the mixing chamber 1 and constant backfill of the bulk material flowing through the feeding part 6, the fluidized material with increased concentration is fed into the pipe branch 2. Due to the pressure drop, the material moves through the pipeline in a locked state by creating additional transverse resistances inserts 5 with holes installed dispersed over the height of the pipeline with a certain step. The creation of crescent-shaped slit holes 8 reduces the formation of dead zones along the wall of the pipeline during the movement of particles of bulk material. In the process of blocking the inclined sections of the pipeline (in emergency situations) with bulk material in the dead zones, the purge process is accelerated by the passage of compressed gas through the slotted holes 8.

Claims (1)

A device for lifting bulk materials with a high concentration in the gas mixture, containing a mixing chamber, a nozzle for supplying compressed gas and a pipeline with sections tilted from the vertical, provided with dispersed transverse inserts installed in them with through holes installed with the possibility of obstructing the movement of material along the lower wall of the pipeline characterized in that the transverse inserts are provided with crescent-shaped cutouts for creating crescent-shaped slotted through holes expanding in side of the lower inner wall of the pipeline.

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