RU2027471C1 - Method and filter-thickener for cleaning suspensions - Google Patents

Abstract

FIELD: filtering equipment for cleaning liquid phase from suspended solid particles. SUBSTANCE: method involves continuously passing suspension forced by hydrostatic pressure through pores of filtering member filaments, which are continuously vibrating one with respect to the other. Vibratory filter-thickener has housing 1 with pressure tank 2, discharge chutes 3 and discharge branch pipes 4. Housing 1 is rigidly connected with stators 6 of electromagnetic vibrators 7. Filtering members are made in the form of polymeric filaments and are collected into pack, which is mounted in horizontal position in upper part of housing 1 at both sides of pressure tank 2. Filtering members 9 are rigidly connected with anchors 13 of electromagnetic vibrators 7. In the process of vibration polymeric filaments are caused to move one relative to the other to provide for continuous recycling of filtering members. EFFECT: increased capacity and enhanced reliability in operation by continuous recycling of filtering members. 3 cl, 1 dwg

Description

 The invention relates to a filtering technique, and in particular to methods of filtering with a suspension, as well as to designs of vibration filter thickeners with flat filter elements, and can be used in mineral processing, in hydrometallurgy, chemical and some other industries, where it becomes necessary to clean the suspended liquid phase particulate matter.

 The purpose of the invention is to ensure the continuous flow of the filtering process through continuously operating filter elements, increasing filtering efficiency and increasing the throughput and self-regeneration of filter elements by changing the geometric parameters of the micropores of the filter elements.

 The filtering method proceeds continuously under the influence of hydrostatic pressure through continuously vibrating polymer fibers of filter elements, during the filtering process changing the geometry of micropores, i.e. their self-regeneration takes place, which excludes clogging of micropores with solid particles. As a result of this, the “live section” area practically does not decrease, which allows to significantly increase the throughput of filter elements.

 A device for providing this method provides for antiphase oscillation of two mechanical systems: a vibration exciter housing-stator and filter elements - an exciter armature.

 In this case, continuous destruction and beating of the sediment layer occurs, individual fibers of the filter elements continuously oscillate relative to each other constantly, regenerating filter elements and thereby increasing their throughput.

 The set of essential features characterizing the invention can be repeatedly used in mineral processing, in hydrometallurgy, in the chemical and a number of other industries, where there is a need to clean the liquid phase from suspended solids, with the technical result consisting in increasing the throughput and self-regeneration of filter elements by changing the geometric parameters of the micropores of the filter elements.

 The method is as follows.

 The suspension is continuously passed under the influence of hydrostatic pressure and antiphase vibration of the housing and polymer filter elements.

 Due to the fact that the thickening and filtering processes are carried out in antiphase, large particles rush to the bottom of the body under the action of gravity, and suspensions are sent to the filtering zones due to the generated hydrostatic pressure.

 During the filtering process, a sediment layer is not formed due to its beating out by vibro-displacement of the polymer filter element fibers and the possibility of the filtrate passing through the micropores formed by these filter element fibers with their constant self-regeneration, since during vibration the shape of the filter element micropores changes in geometric parameters.

 The drawing shows a vibration filter thickener, section.

 The filter is mounted on a support structure (not shown), on which the housing 1 is mounted with a pressure tank 2, drain channels 3 and an outlet pipe 4 provided with a slide 5.

 The housing 1 is rigidly connected to the stators 6 of the electromagnetic vibrators 7, and this system through elastic elements 8 is mounted on a supporting structure.

 The filter elements 9, assembled in a package, are installed horizontally in the upper part of the housing 1 on both sides of the pressure tank 2.

 The filter elements 9, made of polymer fibers, are rigidly connected through the rods 10 and 11 through the movable frame 12 to the anchors 13 of the electromagnetic vibrators 7. The movable frame 12 is mounted on the elastic elements 14.

 The filter elements are made of polymer fibers (nylon, dederon, etc.) with a diameter of 0.3-3.0 mm, depending on the technological conditions.

 By changing the thickness of the filter element package, you can change the technological parameters of the filtering process.

 Vibration filter thickener works as follows.

 The suspension is fed into the housing 1 through the pressure tank 2, which creates hydrostatic pressure. Exciters are activated in the form of electromagnetic vibrators 7. The thickening and filtering processes are carried out in antiphase oscillations of the housing 1 and the polymer filter elements 9. The vibration amplitude of the housing 1 is 0.1-0.2 mm, and the filter elements 0.3-1.0 mm at a frequency of 50 Hz . The polymer filter elements 9 in the process of vibration become mobile, since each of their fibers moves relative to neighboring fibers due to vibrations transmitted to them by the rod 10, and therefore, when they vibrate, the structure of the sediment is destroyed.

 When conducting this process, it becomes possible to continuously self-regenerate polymer filter elements 9 due to the constant change in the position of their constituent fibers, and beating off the sediment layer, which eliminates clogging of micropores with solid particles.

 When separating the fractions, the drain is removed using the drain troughs 3, and the sediment accumulates, vibro-compacts, which reduces its moisture, and is discharged out through the outlet pipe 4, equipped with a gate 5.

Claims (3)

 METHOD FOR CLEANING SUSPENSIONS AND VIBRATION FILTER-THICKENER FOR ITS IMPLEMENTATION.  1. A method for cleaning suspensions, which consists in passing the suspension through filter elements with vibration of the latter parallel to the filtering direction, characterized in that the suspension is passed continuously under the action of the hydrostatic pressure of the suspension and continuously vibrating the individual fibers of the filter elements relative to each other.  2. Vibration filter thickener for cleaning suspensions, comprising a housing with nozzles for removing sediment, filter elements and electromagnetic vibrators, characterized in that the filter elements of polymer fibers are assembled in a bag and rigidly connected to the anchors of electromagnetic vibrators, and the housing is equipped with a pressure tank and rigidly connected to the stators of electromagnetic vibrators, while the filter elements are mounted horizontally in the upper part of the housing on both sides of the pressure tank.