RU80129U1 - MULTIFUNCTIONAL SURFACE ELECTRIC CATCH - Google Patents

Abstract

A multifunctional surface collector using the phenomenon of droplet-dipole motion in an inhomogeneous electric field toward a field of higher tension captures liquid aerosols over an active working surface, alternating in sign, connected in groups, identical in shape to 1 Y-shaped electrodes. The lower edge of the electrodes ends with nozzles 5, forming separate drops, which protects the system from short circuit to the bath. The outflow of fluid from the grooves between the elements of the individual electrode is provided through openings 7 located opposite the drop former 5.

Description

A new useful device relates to environmental protection equipment, which prevents the release of harmful liquid aerosols into the atmosphere and serves to save working fluid (in the zone of its localization in the aerosol state, droplet entrainment is restrained and the liquid returns to the original bath).

Traditionally, galvanic production is equipped with typical ventilation systems with an on-board suction, which does not provide sufficient air purification. In this regard, it is important to use electrostatic precipitators, which are more effective: economical in terms of energy consumption, compact, controllable and universal.

A device for trapping liquid aerosols is known, which forms droplets and ensures the return of liquid to the process bath by means of an electric field formed by electrodes combined with a heat exchanger, a field concentrator and droplet shaper (Patent No. 2050979 “Device for trapping liquid aerosols”, RU, C1, December 27, 1995 g.).

However, an analysis of the processes occurring in the capture zone showed that the presence of such a heat exchanger in the known device complicates the design and reduces its reliability, and the formation of droplets and the return of liquid to the original bath can be achieved in a more rational way.

New solutions implemented in a multifunctional superficial electrocatcher (MNEU) eliminate the disadvantages of the above device, simplify and increase the reliability of the design, without compromising efficiency. A more compact and efficient installation provides the ability to use it in a wider range of working tools, which increases its functionality.

MNEU is located in an aerosol medium above the surface of the working fluid. The structure of the device (Fig. 1) includes Y-shaped electrodes 1, supply busbars 2, insulator 3, mounting posts 4.

The electrode is a section of two corners with a droplet-forming nozzle 5 located in its lower part. The supply busbars unite the individual sections into polar groups and act as fixators for the position of the electrodes in a homogeneous group. The insulator and mounting racks combine the groups into a simple and reliable design, providing the possibility of its subsequent placement and fixation in the working area. Polar groups form

a system with an alternating arrangement of uncharged electrodes, which creates a potential difference in the working space.

The technical result of the invention is the capture of the aerosol and returning it to the process bath in separate drops.

To do this, the device uses the principle - the movement of dipole droplets in an inhomogeneous electric field in the direction of the field of greater intensity.

This is achieved by arranging Y-shaped electrodes of the same type, alternating polarity so that the end (lower part) of the shelf of one electrode is opposite the length of the shelf of the other electrode and is perpendicular to it (Fig. 2).

A stable aerosol is formed above the bubble system (for example, above a plating bath), the emissions of which into the environment are highly undesirable. In this environment, a trapping device is located above the surface of the solution so that the lower edge of the electrodes does not touch the liquid, and the condition of non-breakdown of the electrode-solution gap is observed. At the same time, the lower edge of the electrodes should be located in the region of maximum localization of droplet entrainment.

Aerosol droplets, falling into an inhomogeneous electric field formed by electrodes, polarize (turn into dipoles) and, under the action of a gradient of electric field strength, move towards a field with higher intensity. The electrode consists of two angles, the geometry of which is determined by the conditions of the formation of the field and the drain of liquid in the system. The design of the electrode is based on metal corners (which can be fastened together with screws, rivets, etc.).

Simultaneously with the action of an inhomogeneous field, the trapping action of the device is ensured by an inertial mechanism - the effect of a blind having a sufficient surface for precipitation of droplets.

At the junction of the corners, a groove is formed in each electrode along which through holes 7 are located (Fig. 4) for uniform outflow of liquid covering the electrode surface with a film. From the holes, the liquid enters the drop former, which prevents the formation of a continuous flow when the liquid returns to the bath, preventing a short circuit in the system.

A simple design of the drop former 5 is developed - removable nozzles (Fig. 4), which are installed in the lower part of each electrode opposite

holes and provide an effective drop (discrete) drain of fluid from the electrodes. As drop shapers, forming nozzles were used, which are fastened with hooks 6 at the bottom of the Y-shaped electrodes of Fig. 3.

Claims (3)

1. A device for collecting liquid aerosols, using the principle of movement of dipole droplets in an inhomogeneous electric field towards a field of higher tension, formed by Y-shaped electrodes, where the end of the (short) shelf of one electrode is perpendicular to the long shelf of the next electrode and is located opposite it. 2. The device according to claim 1, characterized in that, in order to simplify the design with the same capture effect, the electric field is formed by alternating identical electrodes in sign. 3. The device according to claim 1, characterized in that in order to ensure an unhindered and uniform along the length of the fluid drain electrode from the groove to the drop former, holes are provided at the junction (at the bend) of the plates, drilled so that they capture both plates for the liquid drain on both sides electrode.