RU85469U1 - DEVICE FOR DISINFECTION AND ACTIVATION OF LIQUID - Google Patents

Abstract

A device for disinfecting and activating a liquid, comprising a chamber for treating a liquid with electrodes mounted in it, a current pulse generator forming a spark gap, characterized in that the chamber is made in the form of a Venturi pipe containing a confuser, a neck, a diffuser, and electrodes are located inside the confuser, made in the form of hemispheres.

Description

The utility model relates to the field of disinfection (disinfection) of liquids from microbiological contaminants, as well as to change the structure of water and can be used in any industry, agriculture and utilities in water and wastewater treatment processes.

A device for cleaning drinking and wastewater from bacterial contamination [I], containing a pipeline for the flow of the liquid to be cleaned with inlet and outlet flanges or fittings, one or more pairs of electrodes separated by insulation from the pipeline, to which electric current pulses are supplied from a high-voltage source, generating shock waves causing disintegration and death of microorganisms. The disadvantage of this device is its high energy intensity (~ 1 kWh / m ³ ), which is the main obstacle to its practical implementation.

It is also known that a device for disinfecting water with electric discharges, consisting of a high-voltage pulse generator, an air gap, a process chamber with an electrode system, in which water is treated [2].

The disadvantage of this device is the high specific energy consumption (1.2 ... 1.5 kWh / m ³ ).

The closest in technical essence to the claimed device (prototype) is an electropulse installation for disinfecting liquids, which eliminates the disadvantages of analogues, namely, reduces energy consumption. The apparatus for disinfecting liquids has a chamber for processing liquids with an electric discharge unit, a current pulse generator, a switching arrester forming an electric discharge, leading and discharging hydraulic systems [3]. The chamber profile is chosen in such a way that the shape of the inner wall coincides with the surface of equal amplitudes generated in the liquid pressure pulses. The electric-discharge assembly is located on the minor axis of the chamber (i.e., the chamber and the electrical-discharge assembly are arranged coaxially) and is made of two coaxially located insulated conductors ending with electrodes immersed in a fluid symmetrically with respect to the major axis of the chamber.

The disadvantage of this installation is the design complexity due to the volumetric chamber, which reduces the quality of disinfection, and does not allow to mount the device in the pipeline for the process of processing liquid in the stream, and this reduces its performance. The design of the electric-discharge unit with tip-to-tip electrodes during the discharge does not completely cover the volume of the processed liquid, which reduces the quality of disinfection and the productivity of the process

The objective of this utility model is to simplify the design, increase process productivity and the quality of liquid disinfection.

The problem is solved as follows, in a device for disinfecting and activating a liquid containing a chamber for treating a liquid with electrodes mounted in it, a current pulse generator forming a spark gap, the chamber is made in the form of a Venturi tube containing a confuser, a neck, a diffuser, while inside the confuser are located electrodes made in the form of hemispheres.

The technical result is achieved due to the fact that the cleaning efficiency is enhanced due to the cavitation effect that occurs when the fluid passes through the neck. The cleaning efficiency is also affected by the fact that the electrodes are made in the form of hemispheres, therefore, the volume of disinfected water increases at the time of electrical discharge. As a result, the productivity of processing the liquid increases, and the execution of the chamber in the form of a Venturi pipe allows disinfection and activation of the liquid to be carried out in the stream, by mounting the device in the pipeline.

The proposed device is illustrated by drawings, where in FIG. 1 shows the design of a device for disinfecting and activating a liquid, and FIG. 2 is a circuit diagram of a device for disinfecting and activating a liquid.

The composition of the proposed device (Fig. 1) includes a chamber for processing fluid 1 with electrodes mounted in it in the form of hemispheres 2, and the chamber is a venturi-type device containing a confuser 3 - front part, neck 4 - middle narrow part, diffuser 5 - expanding end part [4]. The device also contains a current pulse generator 6, to which electrodes 2 and a forming arrester 7 are connected.

The current pulse generator 6 (Fig. 2) consists of a high voltage source made in the form of a step-up transformer T ₁ , which is connected by the primary winding to a standard alternating voltage network U ₁ . The secondary winding with an increasing voltage U _{2 is} connected through the control resistor R ₁ and the rectifier VD to the storage capacitor C. The listed elements form a charge circuit. The capacitor is connected through a forming spark gap 7 and a safety resistor R ₂ to electrodes 2 made in the form of hemispheres located inside the confuser 3. A shaping spark gap (switching spark gap) 7, a safety resistor R ₂ and electrodes 2 form a discharge circuit.

The proposed device operates as follows: the primary voltage U ₁ in the transformer T _{1 is} converted to a high voltage U ₂ (of the order of 1 ... 10 kV) and fed to the rectifier VD. In the forming spark gap 7 and between the electrodes (located in the chamber with water), a breakdown occurs. A high-voltage discharge arising in a liquid as a result of an instantaneous “shock” connection of an energy storage device creates an electro-hydraulic discharge, as a result of which phenomena such as cavitation, ultrasonic vibrations, ultraviolet radiation, and temperature rise occur in the water, which leads to instant death of microorganisms.

In the process of electro-hydraulic discharge, the shock wave ensures the passage of fluid through the neck of the chamber, thereby increasing the cavitation effect with a simultaneous increase in temperature. Along with this, this utility model provides an impact on the formation of structured water, characterized by increased chemical and biological activity. The water treatment time is 3 ... 7 μs.

The use of electrodes in the form of two hemispheres in comparison with electrodes of the tip-plane or tip-tip type, is preferable, because allows for more efficient mixing of water with pressure pulses excited by discharges; the use of tip-tip electrodes leads to an increase in the energy consumption of the installation and a decrease in the process productivity.

The design of the inventive device is simpler to manufacture, since when the chamber is made in the form of a Venturi pipe, there is no need for a profiled chamber, a supply hydraulic system, an axisymmetric water collector, a discharge pipe, and as a result, it becomes possible to mount the device directly into the pipeline system, which allows the process of processing the liquid in the stream, and this improves the performance of the process.

BIBLIOGRAPHY

1. A.S. USSR 225799 from 05.15.83 С02F 1/48.

2. A.S. USSR 960130 from 09/23/82 C02F 1/48.

3. RF patent No. 2 144003 of 02/19/1999 С02F 1/34.

4. Information leaflet No. 213-89 "Method for the disinfection of wastewater in a cavitation field" - Chelyabinsk Interbranch Territorial TSNTI, 1989.

Claims (1)

A device for disinfecting and activating a liquid, comprising a chamber for treating a liquid with electrodes mounted in it, a current pulse generator forming a spark gap, characterized in that the chamber is made in the form of a Venturi pipe containing a confuser, a neck, a diffuser, and electrodes are located inside the confuser, made in the form of hemispheres.