SU1414589A1 - Tumbling unit - Google Patents

Abstract

The invention relates to a casting cleaning technique and can be used in the foundry industry of any branch of the national economy. It reduces environmental pollution and increases the efficiency of waste collection. The tumbling installation consists of a rotating drum 1 with an electric drive 2, equipped with a loading 3 and 4 discharge devices, a fan 5 and a cyclone 6 with a tare bed. At the cyclone outlet nozzle 7 there is an annular connector 8 into which an annular suction collector 9 with gas outlet pipes 10 with electrifying inserts 15 is installed. The pipelines 10 connect a cyclone with a charging device and a cavity 6apia6aHa. The dust formed during the tumbling process is fed through the nozzle 12 to the cyclone 6. Unclassified dust is fed through the collector 9 to the charging device or into the cavity of the drum. 1 hp ff, 1 ill. from the next

Description

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The invention is applied to the casting cleaning technique and can be used in the foundry of any branch of the national economy.

The purpose of the invention is to reduce environmental pollution and improve the efficiency of waste collection.

The drawing schematically shows the installation, the overall appearance.

The tumbling unit consists of a rotating drum 1 with electric drive 2, equipped with loading 3 and unloading 4 devices, filter 5, cyclone 6, on the exhaust manifold 7 of which an annular connector 8 is additionally installed, in which the collector 9 of the ring suction is installed. The exhaust pipe 7 is made detachable to remove from it the near-wall layer of fine aerosols not caught in the cyclone.

Ring connector 8; It can be at a distance of 2-2.5 caliber from the lower end of the exhaust pipe, which corresponds to the most compact aerosols of the molding material in the boundary layer of the gas outlet pipe.

The collector 9 of the ring suction is designed for uniform selection along the perimeter of the pipe for the selection of the near-layer layer of finely dispersed azrozols of the molding material: a.

The return pipe 10 with recirculation valves 11 is mounted between the annular suction collector 9 and the drum loading device 3 or between the same collector 9 and the gas outlet pipe 12 of the drum mounted in the drum bearing 13. The pipeline system is designed to transport fine aerosols from the collector 9 to the charging device 3 or the gas outlet pipe 12.

A container bag 14, made of porous fabric, is hung on the outlet 7 of the discharge port of the cyclone dust collector and serves 1 to increase its degree of decontamination.

The electrifying insert 15 is installed at the end of the recycle pipelines 10 and is intended to intensify the process of coagulation of fine aerosols.

Galtovochny installation works as follows.

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The products to be cleaned are fed into the rotating drum 1 with the drive 2 by means of the loading device 3. The unloaded cleaned

The casting is performed by the discharge device 4, which is formed during the tumbling process ;: dust through the gas outlet pipe 12 by the fan 5 is fed

on cyclone 6. Not captured by cyclone 6, fine dust in the swirling flow of the gas outlet pipe under the action of centrifugal forces is concentrated in the near-wall layer and

through the annular connector 8 and the annular suction collector 9 through pipelines 10 is supplied to the loading device 3 or the gas outlet pipe 12 of the drum to the zone of maximum dustiness for coagulation. Enlarged particles are trapped in the cyclone 6. To suppress the backward vortex, therefore, the degree of dust collection of the dust exhaust pipe of the cyclone dust bag is additionally provided with a filter bag 14 allowing the filtered air to be released into the environment. Localization of the reverse vortex in a cyclone can significantly increase its degree of separation. Dust-free aspiration air, without a wall layer of fine aerosols, is emitted into the atmosphere.

Claims (2)

1. A tumbling installation containing a rotating drum with a drive, a loading and unloading device, and a ventilation system connected to the drum cavity, characterized in that, in order to reduce environmental pollution and improve the efficiency of waste collection, The installation is equipped with a cyclone with a detachable exhaust pipe and an annular suction collector installed in its connector with gas exhaust pipes mounted to be connected to the loading device and the drum cavity, at In the pipelines, electrifying inserts are installed in the installation. 2. Installation of pop. 1, characterized in that the cyclone is equipped with a filter bag.