RU95559U1 - MULTI-PRODUCT ACOUSTIC HYDROCLASSIFIER-THICKENER - Google Patents

Abstract

 A multi-product hydroclassifier, including a container with several conical conical bottoms, adjustable distribution pipes for water supply, pipes for supplying hydraulic mixtures and drains, parallel inclined plates and elements for regulating the speed of movement of the hydraulic mixture between the plates, arranged in two tiers, characterized in that the parallel inclined plates are connected by waveguide, which is connected with an ultrasonic emitter, while the distance between adjacent plates is 1/4 of the excitation length expected elastic vibrations.

Description

The utility model relates to enrichment classifying devices and can be used in mining, chemical and other industries.

A multi-product hydroclassifier is known, including a container with several conical conical bottoms, in the upper part of which are installed distribution distribution pipes for water supply, hydraulic mixture supply and drain pipes, parallel inclined plates located in two-tier tanks located in adjacent tiers crosswise and in the upper tier with ends to the nozzles, with a gap between the plates decreasing from the supply nozzle to the drain nozzle, and the classifier is equipped with a device for the upper overlap interstitial channels made of several perforated sheets [1]. The disadvantage of this utility model is low productivity, poor quality separation of materials due to the variable speed of the hydraulic mixture between the plates with changing characteristics of the incoming hydraulic mixture.

Known multi-product hydroclassifier, including a container with several conical conical bottoms, adjustable distribution pipes for water supply, pipes for supplying hydraulic mixtures and drains, parallel inclined plates and elements for regulating the speed of movement of hydraulic mixtures between the plates placed in the tank in two tiers [2]. The disadvantages of this device are the low performance classification and not a high degree of subsequent thickening of the slurry.

The technical result of this utility model is an increase in the classification performance, a better separation of the material, as well as an increase in the degree of subsequent thickening of the slurry.

The technical result is achieved in that the oblique parallel plates connected by a waveguide which is connected to the ultrasonic transducer, the distance between adjacent plates is _^1/4 the length of elastic vibrations excited.

Figure 1 shows a General view of a multi-shelf shelf-classifier, figure 2 shows a section aa in figure 1.

Multi-product acoustic hydroclassifier - thickener includes a container 1 with several conical conical bottoms 2, in the upper part of which are installed adjustable distribution pipes 3 for water supply. At the end of the tank 1, a pipe 4 is installed for the incoming slurry, and on the opposite side of the drain (outlet) pipe 5 and 6. In the tank 1, parallel inclined plates 7 and 8 are placed in two tiers, located in adjacent tiers crosswise, and the ends to the pipe in the upper tier 4 feed slurry. The hydroclassifier is equipped with elements for regulating the speed of the hydraulic mixture between the plates (lamellas) 7 and 8, which can be adjustable outlets 5 and 6 at the outlet and inside the tank 1, floors 9 and 10 - upper and end - inter-plate gaps, adjustable outlets 11 in the bottoms. End overlap can be made in the form of a perforated sheet 12 with adjustable holes located on the drain side. The hydroclassifier can be equipped with movable walls 13 located in the tank 1 between the conical bottoms 2. The adjustable outlets are equipped with valves 14, and the outlets 11 in the bottoms 2 are interlocked with level sensors 15. Parallel inclined plate 7 are connected through waveguide 16, which is connected to the ultrasonic vibrator 17 (generator), the distance between adjacent inserts (lamellae) is _^1/4 wavelength of the oscillations. Depending on the parameters of the hydraulic mixture, productivity, the necessary degree and quality of separation of the material and thickening due to the effect of acoustic coagulation, the number of waveguides and emitters can be increased. The waveguide 16 passes through the end of the tank 1 by means of a sealing collar 18 to prevent transmission of elastic vibrations to the housing. This ensures tightness.

The proposed multi-product acoustic hydroclassifier thickener has a relatively small size in comparison with analogues. The distance L between the end floor 10 and the end perforated floor 12 is determined by the ratio:

where V is the velocity of the slurry, m / s;

α is the angle of inclination of the lamellas, degrees;

U _gr. - hydraulic grain size to be precipitated, m / s;

K _t - coefficient taking into account the effect of turbulization of the stream at the entrance to the hydroclassifier;

K _s is the fill factor of the interlamella space with settling materials;

h - distance between the lamellae (plates) gidroklassifikatora equal to _^1/4 wavelength of the oscillations, which depends on the frequency of the oscillator.

Multi-product acoustic hydroclassifier thickener works as follows.

Sandy hydraulic mixture by pump or by gravity through the pipe 4 enters the tank 1, where the flow is distributed by the plates 7 into thin layers, in which the material is separated by a given boundary grain. Under the influence of ultrasonic vibrations and the coagulation process, grains of coarse fractions settle down, sliding along the plates into the first conical bottom 2. Through the nozzles 3 and the distribution tube system, a uniform adjustable upward wash water flow is supplied to the top of the bottoms 2, which provides additional classification and enrichment of the coarse material fraction. Further, the material of the large fraction settles in the lower part of the conical bottom 2. The smaller material, which has not settled in the first bottom, moves further in the tank and, due to acoustic coagulation and a lower slurry speed, and smaller gaps between the plates 7 in each of the subsequent bottoms increasingly coagulated fine fractions of the material fall out, and clay and dust particles (microspheres during the hydroclassification of coal sludge and waste from CHP plants) are removed through drain pipes 5 and 6. The greater the flow rate of the pulp in tank 1, the farther large fractions of the material do not pass and accordingly changes in the granular composition of the material in the bottoms 2. The speed of the pulp is controlled by the level and amount of discharge through the drain pipes 5 and 6, as well as the frequency of ultrasonic vibrations. The lower the discharge threshold and the greater its value, the higher the particle deposition rate. The speed of the slurry mixture can be changed by blocking part of the interplate gaps with end faces 10 and 9, as well as increasing or decreasing the level of the product in the conical bottoms 2 by adjusting the valve 14 of the outlet 11 and changing the living cross section of the end perforated floor 12 and changing the frequency of ultrasonic vibrations. The composition of the product in the conical bottoms 2 can be changed by increasing or decreasing the area of the bottoms 2 due to the moving walls 13, as well as by increasing or decreasing the frequency of ultrasonic vibrations.

Multi-product acoustic hydroclassifier - thickener allows you to thicken the slurry to a predetermined density and use the condensed material as a filling mixture to fill the underground mined space and in construction with relatively small dimensions (for example, length does not exceed 5-6 meters) and weight (with a capacity of 30 m ³ / h - 2500 kg, at 60 m ³ / h - 4500 kg).

The utility model allows you to create a multi-product acoustic hydroclassifier - thickener, which provides productive and high-quality separation of the material into fractions with a variable amount, with different grain size and chemical composition of the incoming hydraulic mixture.

Information sources

1. RF patent No. 2068299 for class B03B 5/64, 1994.

Claims (1)

A multi-product hydroclassifier, including a container with several conical conical bottoms, adjustable distribution pipes for water supply, pipes for supplying hydraulic mixtures and drains, parallel inclined plates and elements for regulating the speed of movement of the hydraulic mixture between the plates, arranged in two tiers, characterized in that the parallel inclined plates are connected by a waveguide which is connected to the ultrasonic transducer, the distance between adjacent plates is _^1/4 length wHO induced elastic vibrations.