SU1477807A1 - Apparatus for separating finely granular material and gas-cleaning to installation for preparing asphalt-concrete mixes - Google Patents

Abstract

The invention relates to the field of construction, namely, devices for the separation of fine-grained material in installations for the preparation of asphalt concrete mixtures. The purpose of the invention is to increase reliability. The device contains a screen mounted in the bunker and a granular filter. Divided on the screen material enters the screen. The screenings of the lower screen of the screen enter the bunker compartment. The oversized product from the tray evenly across the width fills the granular filter cassettes. 4 il.

Description

one

The invention relates to the construction, in particular to devices for the separation of fine-grained material in installations for the preparation of asphalt concrete mixtures.

The purpose of the invention is to increase reliability.

FIG. 1 shows the proposed device, a general view; in fig. 2 - the same, side view; in fig. 3 - node I in figure 1; in fig. 4 is a section A-A in FIG. 2

The plant for the preparation of asphalt bolds with a device for separating fine-grained material and gas purification contains a unit for feeding inert materials, from the bins of which to the loading device of the drying drum 1 there is a conveyor for transporting (L

neither the material, the storage device, the heating of the bitumen and the mineral powder and the supply to the mixer (not shown).

Drying drum 1 has a discharge device located above the receiving tray of the bucket elevator 2. Pasrpy3O4Hqe the elevator device is located above the receiving tray of the vibrating screen 3, which serves to separate the hot material by size. The ends of the screens are located above the corresponding compartments 4 and 5 of the bunker of the accumulation material and oversize storage bunker. The vibrating screen 3 has a deaf deck 6 below for vibro-transporting the dropout product to the receiving tray of the additional vibrating screen 7 located under the main screen 3 in the bunkerЈ J

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re and intended for the separation of fine-grained material in the compartments 8 and 9 of the bunker.

The vibrating screen 7 is provided with a rotary bottom sieve 10 to maintain the separation boundary and secured to the last perforated tray 11 for uniform feeding of the particulate filter. In order to dedust the upper class granular material, a screen 12 is located on the tray and a pipe 13 of fresh air is disposed between it and the tray. The guides 14 are designed to evenly pass the material through the granular filter 15, consisting of a row of cassettes 16, located in the bin compartment above the mixer dispenser 17.

The duct 18 provides for the discharge of hot dusty gases with the help of a smoke exhauster from the drying drum and through the diffuser 19 from the screen unit and from the bunker. The gas duct 20 is connected through one of the cavities of the granular filter cassettes, and the outlet diffuser 21 through one with adjacent cavities of the cassettes.

The installation works as follows.

Inert materials as aggregate of asphalt-concrete mixtures flow from the power unit to the drying drum, from where the heated material enters the receiving tray of the vibrating screen 3. Using the elevator 2, the coarse-grained material separated into this section enters the bunker compartments 5, and the non-bulk material is separated from section 4. The fine-grained material as the undersize product of the lower screen of the vibrating screen 3 is transported by a deaf deck 6 to the receiving tray of the screen 7, where it is divided by size into a fraction that feeds the granular Filter, and dropouts. The screening of the lower screen of screen 7 enters the bin 8 of the hopper, and the entire oversize product enters the tray 11 with holes and fills the granular filter evenly across the width. The removable screen 12 and the pipe 13 with slots for air supply serve to create a stream of dust from the material towards the diffuser 19, which is located on the vibrating tray in a liquefied state. The filter material gets dust-free. The guides 14 serve to evenly advance the layers as the fine-grained material is discharged from the dust of the bin compartment 8 through the dispenser 17 to the mixer.

Claims (1)

Invention Formula A device for separating fine-grained material and purifying gas to an installation for preparing asphalt-concrete mixtures, containing successively installed screen, a bunker with an additional screen placed under it, and a granular Filter with gas inlet and outlet located above the mixer, characterized in that in order to increase reliability, the granular filter is placed in the bunker and made in the form of parallel-mounted box-shaped cassettes with the formation of cavities connected through one with the inlet and outlet of the flue, and the additional screen is made with a bottom sieve rotating in a horizontal plane and a perforated tray fixed to the latter, with the tray located above the upper edges of the cassettes. Ik 20; i i (v / 1 IJ4 / Jigl Compiler N.Popova Editor N.Rogulich Tehred M.Hodanich Proofreader V.Girn to Order 2321/28 Circulation 495Subscription VNIIPI State Committee for Inventions and Discoveries at the State Committee on Science and Technology of the USSR 113035, Moscow, Zh-35, Raushsk nab. 4/5 Production and Publishing Combine Patent, Uzhgorod, st. Gagarin, 101 sixteen 15