SU1039578A1 - Filtering centrifuge with vibration discharging of deposit - Google Patents

Abstract

A VIBRATING DOWNLOAD FILTER CENTER, containing a rotor consisting of at least two successively installed conical sieves to form a threshold, characterized in that the screen elements are interconnected by elastic elements. SP with: about SP H 00

Description

The invention relates to devices for separating liquid inhomogeneous systems using centrifugal forces, in particular centrifuges, and can be used in the coal, chemical and other industries,

A filtering centrifuge, known in the coal industry, is known for dewatering materials in a perforated rotor using centrifugal and vibration forces, and the material is usually coarse-grained (for example, class 0-13 or 0 coal or anthracite concentrate). -25 mm with the content of small classes 0-05 mm to 5%) 1.

The disadvantage of this centrifuge is that it cannot be used to dehydrate fine-grained materials, since a high moisture content of the precipitate is obtained in a 1-1 -1 degree of seizure of the material.

The closest to the technical essence of the present invention is a filter centrifuge with a vibratory discharge of sediment containing a rotor consisting of at least. Two consistently installed with the formation of a threshold of conical sieves 2.

However, a high power consumption is required to oscillate the rotor in a given dynamic mode consisting of two sieves. For example, for a rotor with a total mass of actively vibrating parts of 550 kg, a 5.5 kW electric motor is required. In addition, due to the large mass of the rotor, it is difficult to obtain the required amplitude at a high oscillation frequency. For the indicated mass at a frequency of 25–30 Hz, it is possible to achieve with limited power only amplitudes of no more than 2–3 mm. A reliable transportation and high-quality dewatering amplitude up to 5-6 mm is required.

The purpose of the invention is to reduce energy consumption.

This goal is achieved by the fact that in the filtering centrifuge with a vibratory discharge of sediment containing a rotor consisting of at least two successively installed conical sieves to form a threshold, the sieves are interconnected by elastic elements.

At the same time, only the second stage sieve actively vibrates, elastically connected to the first stage sieve. This leads to the fact that it is possible to almost halve the oscillating mass. The result is a reduction in energy consumption, the possibility of obtaining a larger amplitude of oscillations at the same frequency {in the region close to the second resonance, in which, as a rule, vibration centrifuges operate to dehydrate coal. Usually, the first conic I sieve of the first stage is supplied: material with high initial strength, i.e. with a low coefficient of friction, and no. the need to produce an active vibration for movement is enough and the angle of inclination of the cone. After the formation of a precipitate (removal of a part of moisture), the coefficient of friction increases: .- sharp shaking, lack of pressure, disturbance of the formation of the capillaries is necessary. This is done when the threshold of the first step is passed to the second stump. In the second stage, the pre-dried material is vibrated actively. Thus, the properties of a moving product and the degree of influence of disturbing forces on it are organically combined.

The drawing shows a centrifuge, a longitudinal section.

The centrifuge contains a rotor consisting of successively installed with the formation of a threshold of 1 sieves 2 and 3. One or several elastic elements 4 (annular vibration isolators of shear) are installed between the sieves. The sieve 2 is rigidly connected to the shaft 5, which is via radial-thrust bearings; it is connected to the housing 6 where it has installed (2n vibrator 7 (for example, self-balancing type). Pulley 8 is mounted on shaft 5. From practice of manufacturing and operating vibration shear insulators for large-capacity centrifuges it is known that they have a high (superhigh flexibility, at the same time, have a high crush stiffness. Therefore, there is no reason to fear the appearance of unstable modes of dead time and vibration of the second stage sieve.

The centrifuge works as follows.

Torque through pulley 8, shaft 5 is transferred to sieve 2, then, through vibration isolator 4 sieve 3. At the same time sieve 3 intensive axial oscillations from vibrator 7 are reported at a frequency close to resonance. With edom, the sieve 2 of the first stage also fluctuates, but since it together with the body represents a large mass, its amplitude is significantly less than the amplitude of the sieve 3.

The slurry is initially fed to screen 2. Here the preliminary separation of the liquid and solid phases takes place. Then the material, passed through threshold 1, goes to sieve 3, where conditioned dehydration occurs. .

Installation of elastic elements between the first and second stages

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with the formation of a threshold between them - this makes the amplitude of oscillations in the proposed design 5-6 .mm / that the benefit of the centrifuge designed to be dehydrated during the dewatering process, the coal sludge dehydration, is almost moisture. The annual reduction of the installed power-economic effect is 10 times the drive (from 5.5 to 3 kW J. At 5 12 thousand rubles.

Claims (1)

FILTERING CENTRIFUGE WITH VIBRATION UNLOADING SEDIMENT, containing a rotor, consisting of at least two conical sieves installed in series to form a threshold, distinguishing ·; with the fact that, in order to reduce energy intensity, sieves are interconnected by elastic elements. SU „, .1039578>