SU1734875A1 - Hydrodynamic vibrator - Google Patents

Abstract

The invention can be used to produce emulsions and pulverize fragile solid pulp particles. The purpose of the invention is to increase the efficiency of a hydraulic vibrator by increasing the processing time. In the chamber 1 with the nozzles 2 installed reflecting device and the vibrating rods 4, located around the device. The reflecting device is made in the form of two oppositely rotated screws 5,6 and the impeller 7, mounted between the screws 5, 6, mounted on a common shaft 8. The shaft 8 is connected with the electric drive 9. 1 Il. Yo

Description

VI

WITH

00

Xi ate

The invention relates to the technology of producing emulsions and grinding fragile solid particles of pulp and can be used, for example, in alumina production for grinding particles of aluminum hydroxide, which is in the seed pulp.

A device for grinding solid particles is known, comprising a housing within which rigidly and permanently mounted vertical concentrically located cylinders, loading and unloading nozzles, an actuator connected to a shaft on which is mounted a disk with vertical cylinders mounted with a gap between the stationary cylinders of the housing however, all cylinders are made with a perforated surface.

The disadvantage of the apparatus is the unreliability of its operation due to the possibility of blockage of the cylinder bores by the solid phase of the treated solution (pulp).

Also known is a hydrodynamic multislit vibrator used to prepare emulsions and to treat corrosive media. The vibrator consists of a pipe in which the nozzle is coaxially located, a resonant chamber in which a reflecting device is located in the form of a baffle plate and a large number of vibrating rods around the circumference. The liquid jet flows out under high pressure (8–12 atm) from the nozzle and, after a collision with the plate, deviates in the radial direction. Through the slits in the pipe, the liquid enters the resonant chamber and is exposed to vibrating rods.

The disadvantage of the apparatus is that the supply of liquid to the reflecting plate must be carried out under high pressure, which is not always possible under production conditions. The effect on the particles is carried out once. In addition, the reflecting plate creates resistance to the movement of the fluid, which changes its direction of movement by 90 °, which causes an additional load on the pump. All this reduces the effectiveness of the (operation) of this unit.

The aim of the invention is to increase the efficiency of the apparatus.

This goal is achieved by the fact that the reflecting device of the apparatus is made in the form of two oppositely rotated screws and an impeller mounted between the screws mounted on a common shaft connected to the electric drive.

The drawing shows the proposed hydrodynamic vibrator, a general view in section.

The vibrator consists of a chamber 1 with a supply nozzle 2 and a liquid outlet 3 (pulp), vibrating rods 4, screws 5 and 6, impellers 7 mounted on a shaft 8 connected to an electric drive 9. Ring 10 serves to limit the vibrations of the rods.

The vibrator works as follows.

The pulp is fed into the chamber 1 through the nozzle 2. Under the action of rotating screws 5 and 6, the pulp after filling

chambers 1 moves down and up respectively on the turbine 7, which throws the pulp on the rods 4. The latter vibrate and act on the solid particles (aluminum hydroxide), grinding them. It turns out

fine pulp, which can be used as a seed in the decomposition of the aluminate solution. This pulp is discharged from chamber 1 through nozzle 3. In the process, two

pulp circuits (lower and upper) created by screws 5 and 6 and turbine 7. Pulp flows created by screws 5 and 6 meet in the zone of the impeller 7, are thrown to the periphery, move along

the walls of chamber 1 (upper stream up, lower - down) and re-sucked into the central part, etc. In order to increase the efficiency of particle attrition, there may be more such circuits,

than two (depending on the height of chamber 1), which is achieved by increasing the number of turbines and screws.

The circulation of pulp in the proposed apparatus allows the particles of the solid phase

repeatedly subjected to vibrating rods, and not once, as in the known apparatus. This increases the efficiency of the rods on the solid particles of the pulp, which to a greater extent

contributes to their grinding. At the same time, the grinding process can be controlled by varying the pulp flow rate and the shaft rotational speed, and a high pressure transport pump is not needed. In addition, grinding can be increased by increasing the volume of the chamber, as this increases the residence time of the pulp in the apparatus, i.e. the processing time of the pulp increases, which cannot be achieved in a known apparatus.

Thus, the proposed apparatus is more efficient.

Claims (1)

Claims of the invention A hydrodynamic vibrator comprising a chamber with nozzles, a reflecting device installed in the chamber, and vibrating rods arranged around the reflecting device, characterized in that, in order to increase processing time, the reflecting device is made in the form of two oppositely rotated screws and an impeller installed between the screws fixed to a common va efficiency by increasing the 5 lu associated with the electric drive.