LT6095B - Drinking water and wastewater treatment method and device - Google Patents

Abstract

Drinking water and wastewater treatment method and device, where water or wastewater stream is processed by various physical and chemical consequent factors. Its aim is to reduce energy consumption. In this method and device includes at least an electric plasma reactor (1), as well as potential water overflow tank (17), and precipitation (14), cumulative (16) and water-flow capacities (10) with pumps (11, 18) and ozonization column (9). This method and device is characterized by the fact that in hermetic electric plasma reactor (1) housing is created an overpressure, which increase the ozone output and makes ease its transmission through the ejector (12) into the ozonization columns with points of contact plates (13). Into the reactor pool, compressed air is supplied through the diffuser (7), creating bubbles and splashing in water surface. The water between the electrodes (3) through dielectric tube (19) is fed in such a way that the electric plasma discharges envelop in ring manner its flow and it to be broken into drops. Device electric plasma reactor (1) housing is made of dielectric material with sound insulating gasket and the inside is coated with UV-reflecting mirrors, each of the electrode pairs (3) has a separate power supply (4).

Description

TECHNICAL FIELD

BACKGROUND OF THE INVENTION The invention relates to the treatment of drinking water and wastewater flowing streams. More particularly, the present invention is directed to the treatment of a flowing stream by a variety of physical factors such as pressure and electro-plasmic discharge, and the chemical factors arising therefrom.

TECHNICAL LEVEL

Previously patented devices are known for treating water and wastewater by eliminating bacterial and other biological contamination by electro-plasma discharge and the resulting magnetic fields, ultraviolet radiation, local pressure changes and other additional factors.

Lithuanian Patent LT5082, published 2003 Dec. 29, describes a device in which water is treated with both an electro-plasma discharge and a pulsed magnetic field. Because this unit treats the rotating water plane, ultraviolet radiation is not effectively used due to the relatively thick water layer of 2-8 mm and the presence of opaque treated water.

Chinese Patent No. CN101935092, published May 2011 Describes a water purification plant using low temperature plasma and air oxidation for the purification process on January 5th. The unit consists of a reactor vessel, an oxidizer, and a melting device, and is characterized in that the oxidizer is located at the bottom of the reactor vessel and is used to form bubbles in the reactor vessel, thereby increasing the mass transfer between oxygen and water. The discharge unit is comprised of an electrode and a power supply, which are housed in a reactor vessel. The electrode is used to generate free radicals, ozone, and ultraviolet radiation. Due to the presence of electrodes in the water, due to its melting and low water transparency, this device does not efficiently utilize ultraviolet radiation.

Lithuanian patent LT4323, published in 1998 April 27, 2007 describes a device characterized by the simultaneous exposure of the effluent stream to thermal shock, ozone, ultrasonic and ultraviolet radiation, and to the accompanying factors that occur when the effluent stream is treated with short and powerful E, H field pulses. The treatment flow configuration and system parameters shall be selected so as to be capable of exposure to strong ultraviolet radiation as well as air saturated with post-discharge ozone, activated magnetic field, incident radiation and radicals enhancing its activity. Due to the large area and velocity of falling water flow, the device described in this patent is not always efficient and not suitable for all wastewater. In addition, the short residence time of the treated flow in the interelectrode space determines the short duration of exposure to ultraviolet light.

The state of the art, Chinese Patent CN 101638285, published May 2010 Describes a wastewater treatment system consisting of: a sand deposition tank, a controlled reservoir, an aerobic basin, a sloping plate settling tank, a filtration tank, an ozonation tank. Aerator at the bottom of the adjustable tank. Water enters the ozonation reservoir through a pump and venturi nozzle, the inlet of which connects with an electroplastic air ozonator. Since the electroplasmic discharge does not take place in a reactor with water but in a separate vessel, additional physical factors such as electromagnetic fields, ultraviolet radiation and local pressure changes are not used to purify the water.

All the above-mentioned inventions also do not provide a system for overpressure generation in electro-plasma reactors, the benefits of which are realized by the present invention.

THE SUBSTANCE OF THE INVENTION

The object of the present invention is to utilize more effectively the physical and chemical factors generated during electroplasmic discharge and thereby reduce energy consumption. Simple device maintenance is also sought. The proposed method of treating drinking water and wastewater is based on a complex treatment of the following factors, each of which, individually and possibly all together, has a strong effect on the pollutants in the water.

In order to increase the efficiency of the device, an additional air compressor (8) is created in the airtight electroplasmic reactor (1) by means of an additional pressure. This overpressure facilitates the removal of ozone formed from the electroplating reactor (1). This increases the safety of the reactor as it explodes when ozone exceeds 10% by volume. In addition, the increased air circulation in the electroplasmic discharge zone (20) results in a higher ozone release, which then reacts with the pollutants in the water. In order to increase the irradiation of the water by ultraviolet radiation emitted during the electroplastic discharge, the inner walls of the reactor (1) housing are covered with ultraviolet reflecting mirrors. Also, the reactor (1) housing has a sound-insulating gasket and tinted, easy-to-open glass windows for easy maintenance.

Compressed air is fed from the compressor (8) into the pool of the electroplastic reactor (1) via diffusers (7). In this way, bubbles are formed in the basin which swell up with tiny droplets on the surface of the water and are thus more effectively exposed to ultraviolet light.

For the most efficient treatment of the water by electro-plasma discharge, the water in the device is fed so that its current is crossed by an apparent line connecting the ends of the electrodes of different polarity (3). In this way, the water stream is enveloped by a ring and subjected to electrostatic and electromagnetic fields in the flow crossing plane, hydrodynamic pressure over the entire radial surface of the stream, and acoustic shock across the surface of the running water. By acting on these factors, the passing stream is scattered into small droplets and is virtually irradiated with ultraviolet light in its entirety. Also, the angle of the dielectric tubes (19), which feed the water to the horizon, can be adjusted and thus adjust the current drop rate according to technological needs.

The water is directed towards the pores of the electrodes (3), which are radially fed from the center of the housing. Each of the electrode pairs (3) has a separate power supply (4). As a result, even if one of the power supplies (4) fails, the water flow is still treated with the remaining electrode pair (3). It also facilitates service and repair, and allows for expansion of the device by mounting additional electrode pairs (3).

Water ozonation takes place in a dedicated column (9), which has contact plates and is of a certain height, calculated so that all ozone reacts with pollutants in the water as it rises to the top. Ozone is fed into this column (9) through a ejector (12), thereby ensuring minimal ozone depletion before and after contact with water, and its maximum dissolution in water. The ejector (12) also provides ozone removal from the reactor (1) housing at low overpressure, further increasing the safety of the unit and extending the range of operating pressure in the reactor (1).

Because many of the features mentioned above allow for more efficient operation, a plasma discharge voltage of less than 15 kV, a specific energy of less than 2 J / cm ³ , and a discharge time of up to 1 ms are used.

BRIEF DESCRIPTION OF THE DRAWING FIGURES

For a better understanding of the invention, explanatory drawings are provided. The drawings are given by way of example only and in no way limit the scope of the invention.

1. a schematic drawing of a method and a device showing one embodiment.

FIG. schematic drawing of a section of an electroplastic reactor (1) showing one embodiment.

3. Schematic drawing of an electroplasmic reactor (1) showing a water distribution and supply to one of the embodiments of the electroplasmic discharge zones (20).

PREFERRED EMBODIMENTS

In a preferred embodiment, the main element of the device is an electroplating reactor (1). Its body is airtight, made of dielectric material with a soundproofing gasket, and has tinted windows made of tempered thick quartz glass. The inner walls of the housing are covered with ultraviolet reflecting mirrors.

A water supply and distribution device (2) is provided in the upper part of the housing of the electroplasmic reactor (1), which comprises dielectric tubes (19) for supplying water to the electro-plasmas discharge zone (20). Depending on the technological need, the tube can be adjusted from O to 75 degrees from the vertical drop direction to change the water drop rate. In the middle part of the housing there are pairs of electrodes (3) radially arranged, each having a separate power supply (4) mounted on the upper dielectric cover as a base. These power supplies (4) are also covered with a dielectric having a ventilation system.

In the lower part of the body of the electro-plasmatic reactor (1), a water basin, a water level maintenance and discharge system (5), an ozone collecting device together with a duct (6), air supply diffusers (7) with ducts are formed. Air is supplied to the pool of the electroplastic reactor (1) by means of a compressor (8).

The compressor (8) also creates an overpressure in the housing which, together with the flow of the supplied water, determines the water level in the pool.

The ozonation column (9) into which water and ozone formed in the reactor passes through the ejector (12) has contact plates (13). The water settling tank (14) has a thin-film settling tank (15) mounted therein.

When preparing the unit for operation, the storage tank (16) is filled with water to be cleaned. When the pump (18) is turned on, the water fills the overflow vessel (17), which ensures an even flow of water to the electroplastic reactor (1). In the reactor housing, water flows through the distribution device (2) and further through the adjustable dielectric tubes (19) into the gap between the electrodes (3). When the water in the pool reaches the overflow level, the air compressor (8) is activated. Compressed air enters the pool through diffusers submerged therein (7). When the desired overpressure occurs, the electroplasmic power supplies (4) are turned on. Plasma discharge occurs at sufficient voltage between the electrodes. The pre-treated water flows from the reactor basin to the circulation vessel (10) from where it is fed to the ozonation column (9) by a pump (11) through an ejector (12). When the water is fed to the ozonation column (9), the ejector (12) also mixes with the ozone formed in the electroplastic reactor (1). After the ozone has reacted with the pollutants in the water in the ozonation column (9), the water is poured into the settling tank (14) where a thin-layer precipitator (15) is installed to purify the water from the pollutant fraction.

Claims (12)

DEFINITION OF INVENTION A method for treating potable water and wastewater, wherein the water is treated at least in an electroplasmic reactor (1), and also possibly transfused, precipitated, stored, circulated and ozonated in a separate room, characterized in that the pressurized housing (1) can be adjustable. A method for treating potable water and wastewater according to claim 1, characterized in that compressed air is blown into the water contained in the electro-plasma reactor (1) through submersible diffusers (7). Method for treating potable water and wastewater according to one of the preceding claims, characterized in that the stream of water fed for cleaning in the electroplastic reactor (1) is crossed by an apparent line connecting the ends of the electrodes (3) of different polarity. Method for treating potable water and wastewater according to one of the preceding claims, characterized in that the electrode pairs (3) are arranged in a radius from its center and the water is supplied by dielectric tubes (19) at an angle perpendicular to the apparent line. pole electrodes (3). 5. A method for treating potable water and wastewater according to one of the preceding claims, characterized in that the angle between the horizontal and the dielectric tubes (19) through which the bath is fed to the electro-plasma discharge zone (20) can be adjusted. 6. A method for treating drinking water and wastewater according to one of the preceding claims, characterized in that a column (9) having one or more contact plates (13) is used for ozonizing the water. 7. A method for treating drinking water and wastewater according to one of the preceding claims, characterized in that the ozone is supplied to the ozonation column (9) by means of an ejector (12). 8. A method for treating drinking water and wastewater according to one of the preceding claims, characterized in that a voltage of 10-15 kV, a specific energy of less than 2 J / cm ³ and a discharge time of less than 2 J / cm ^{3 are} used for the electroplastic discharge. 1ms A potable water and wastewater treatment plant comprising at least an electroplasmic reactor (1) as well as, possibly, a water transfer vessel (17), a settling tank (14), a storage tank (16) and a water circulation tank (10) with pumps (11, 18). ) and ozonation columns (9), characterized in that an auxiliary air compressor (8) is provided in the airtight housing of the electroplastic reactor (1), which can be regulated. Drinking water and wastewater treatment plant according to Claim 9, characterized in that separate power supplies (4) are used for each pair of electrodes (3) in the electroplastic reactor (1). Drinking water and wastewater treatment plant according to one of claims 9 to 10, characterized in that the housing of the electroplating reactor (1) is made of a dielectric material with an insulating layer, which has tinted opening glass windows and is internally covered with mirrors reflecting UV light. . 12. Drinking water and wastewater treatment plant according to one of claims 9 to 11, characterized in that the process according to one of claims 1 to 8 is used.