DE102004010656B4 - Apparatus for the treatment of organic and / or biologically contaminated water - Google Patents

Abstract

Device for the treatment of organic and / or biologically contaminated water with positive and negative oxygen ions as oxidizing agent, comprising a tubular electrode generator (4) enclosing a pulsed high voltage electrode (12, 13) with this upstream filter (2) and controllable fan ( 1), a control system (3) associated with the ion generator (4) and an outflow system connected to the ion generator (4) on the outlet side with outlet openings (5) arranged over a wide area, characterized in that
- The ion generator (4) an outer glass tube (10) and an inner glass tube (11), on the outside of a first electrode mesh (12) and on the inside of a second electrode mesh (13) are arranged made of stainless steel, and
- The control system (3) includes an ion measuring sensor for the measurement of which dependent on its control of the voltage between 2300 and 6400 V and the pulse frequency between 4000 and 16000 Hz, and
- The outflow system by a between a closed bottom plate and the outflow openings (5) having a cover plate spirally extending, on the ...

Description

The The invention relates to a device for the treatment of organic and / or biologically contaminated water according to the features of the preamble of claim 1.

Becoming present a variety of water treatment methods used in practice. These are based on very different methods, such as on radiant energy, especially in the UV and gamma region, adding of chlorine or chlorine gas, hydrogen peroxide and sodium chloride for electrolysis and various other chemical auxiliary processes.

All However, previous applications have one thing in common, the addition of chemical substances or considerable quantities of electrical or Ray energy. Science and technology agree that any addition of aggressive chemicals (especially to call Here are chlorine, chlorine oxide, ozone, hydrogen peroxide, silver, copper, etc.) Risks, as well as adverse effects.

One Process for oxidative water sterilization with ionized air is by F. Sodec u. a. in "Oxidative Water sterilization in RLT systems with ionized air ", TAB Technik am Construction, special edition from 1/2004 described. To generate the ions is an airflow generated by a compressor through a tubular, led separated ionizers and cathodes ionizer, wherein the height the electric voltage and the field strength as well as the training of Electrode and the residence time of the air flow in the ionization module determine the concentration of ions. The ionized airflow is passed finely divided into the water to be treated.

At one of the DE 100 14 833 A1 known method for the treatment of water with ionized air, the ionization is carried out in an ionizer and an ionization with downstream Differenziator with large area separated by a glass plate anode and cathode braids at a DC voltage of 3 to 6 kV, with a tap changer a certain pulse duration can be set ,

According to one in the DE 696 25 872 T2 In the described method for preventing the spread of microbes with ionized air, the concentration of the ions can be adjusted by controlling the frequency of a pulsed DC voltage used for the discharge.

From the DE 43 40 788 A1 For example, another method for preventing the propagation of microbes with an ionic gas is known in which the ozone contained therein is removed by decomposition in a chamber, the voltage applied to the electrodes for ionization to the electrodes being 3.5 kV. The corresponding device comprises an ionization chamber for ionizing the air and a downstream of this chamber for decomposing the ozone contained in the ionized air.

According to one in the DE 199 31 662 A1 described apparatus for generating ionized gases by means of corona discharge are assigned to the electrodes on both sides plate-shaped insulators and in the cavity between two opposing electrodes is a Durchströmkörper.

The invention provides a further development of the method and the device according to DE 100 14833 A1 This applies in particular to the supply of the air to be ionized, the process conditions, the control and the structure of the ion generator and the outflow system.

The The object of the invention was a water treatment plant to develop with the natural Oxidation with ionized air optimal for the treatment of organic and / or biologically contaminated water.

According to the invention Task with one according to the features solved by the patent claim 1 device. A advantageous development of the invention results from claim Second

to Ionization is the air via blower / compressor via a Filter sucked and in a tube-shaped ion generator swirled. The oxygen molecules be with a voltage of 2,300 V to 6,400 V and frequencies from 25 Hz to 580 Hz at a pulse rate of 4,000 to 16,000 Hz ionizes and the air is charged with the electrostatically charged Particles over an outflow system wide area introduced into the medium to be treated and thereby distributed, wherein the optimal working range by measuring the ion intensity over one Ion probe and a control system adapted thereto is controlled.

The Pulse frequency or Umpolfrequenz the electrodes is independent of the frequency of the alternating current used set by pulse generator. This is supposed to increase the number of positive and negative oxygen ions be steered. It is useful the air at a pressure of 0.2 to 0.6 bar in the ion generator initiated. Preferably, the voltage at the ion generator should be 200V to 250V and the frequency 50 Hz to 150 Hz (e.g., mains voltage) at a pulse rate of 4,000 to 6,000 Hz.

In the ion generator, oxygen ions O ₂ + and O ₂ - are formed by electrostatic charging of the inactive oxygen molecules. The charged oxygen ions are conducted with the air to the discharge system. The work area is limited to a relatively small chemical reaction energy range. The key point of the development was to use this small area between inactive oxygen and ozone for the natural oxidation due to the higher oxidation potential of active oxygen ions. The transition from active oxygen ions to ozone alone is very fast in the influence of high amounts of energy in practice. Since the degradation effects of ozone are much lower than by ionization, was developed in the development of the process to the exclusive production of oxygen ions in order to rule out the increased formation and overreaction towards ozone. Any amount of ozone generated, even in practice, means loss of actively generated oxygen ions. The primary available oxygen content in the ambient air must, in order to achieve an optimal oxidation behavior, be used optimally for the generation of oxygen ions. This was achieved by various technical parameters such as voltage type and voltage level.

hydrocarbons and their chemically analogous compounds are thus fast and effectively oxidized. Due to the high oxidation potential of the charged oxygen ions are split bacterial envelopes and thus sustainable destroyed. Dissolved in water Humic substances belong to the hardly degradable substances in drinking water treatment. Again, good results are achieved. A targeted use positive or negative oxygen ions can chemical degradation quantitatively affect substances that are difficult to oxidize.

in the Contrary to the ozone production become the oxygen ion generation much less energy needed. The total energy requirement is at about 0.8 watts per liter medium loaded raw water.

It It is important that the ionized air flows as large as possible into the polluted water becomes.

One Ion probe monitored in the exiting air duct the working area of the ion generator and controls the voltage and Frequency in the ion generator, depending on the degree of soiling.

• – einem Seitenkanalgebläse/Kompressor (1) mit vorgeschalteten F7-Filter (2) zur Ansaugung/Kompression von Luft,
• – einem Ionenerzeuger in Form zweier ineinander gesteckter Glasröhren (10, 11) mit einem (durch eine der Glasröhren (11)) getrennten ersten und zweiten Elektrodengeflecht (12, 13) (Kathoden- und Anodengeflecht) aus Edelstahl,
• – einem breitflächig angeordneten und zu Verwirbelungen der ionisierten Luft im aufzubereitenden Medium führenden Ausströmsystem und
• – einem Regelsystem (3), das durch einen Ionenmessfühler gesteuert wird.

The device or system according to the invention consists of

• - a side channel blower / compressor ( 1 ) with upstream F7 filter ( 2 ) for the suction / compression of air,
• - an ion generator in the form of two nested glass tubes ( 10 . 11 ) with one (through one of the glass tubes ( 11 )) separate first and second electrode meshes ( 12 . 13 ) (Cathode and anode mesh) made of stainless steel,
• - A broad-based and leading to turbulence of the ionized air in the medium to be recycled leading outflow system and
• - a control system ( 3 ), which is controlled by an ion sensor.

Under a so-called F7 filter becomes a fine filter <50 μm for the Filtration of the intake air to be sucked understood.

It is particularly advantageous if all components of the device, with the exception of the outflow system, are arranged compactly in a closed and transportable system ( 1 ).

The ion generator in the form of a cylinder ( 2 ) consists of one with two end caps ( 9 ) provided glass tube ( 10 ), in which a second glass tube ( 11 ) above and below in the end caps ( 9 ) is embedded. The second glass tube ( 11 ) serves as an insulator between the first ( 12 ) and second ( 13 ) Electrode braid. The air is applied to an end cover ( 9 ).

With this flow, it comes at the electrode braids ( 12 and 13 ) to turbulences and at the same time to the electrostatic charge of the oxygen molecules in the air. The now activated positive and negative oxygen ions are transmitted via the other end cap ( 9 ) to the discharge system.

To achieve optimal turbulence, the air is introduced into the ion generator at a pressure of 0.2 to 0.6 bar. The first electrode mesh ( 12 ) consists of stainless steel with a mesh size preferably from 0.6 mm to 1.5 mm and a material thickness preferably from 0.2 mm to 0.5 mm. The second electrode mesh ( 13 ) is also made of stainless steel, but with a mesh size preferably from 1.4 mm to 2.6 mm and a material thickness of preferably 0.5 mm to 1.2 mm.

Of the Working range is at a voltage of 2,300 V to 6,400 V and a frequency of 25 Hz to 580 Hz. Suitably, alternating current of 200 V up to 250 V (mains voltage) and a frequency of 50 Hz and over 50 Hz used.

The outflow system according to the invention is designed over a wide area, namely as a discharge plate with an air distribution spiral ( 3 ).

In the treatment of drinking, process and and waste water is distributed through the Ausströmplatte. This plate consists of a closed lower plate, an air distribution spiral ( 17 ) with a height of 8 mm to 14 mm and a cover plate with holes ( 5 ) from 0.6 mm to 1.3 mm, through which the ionized air with an air bubble size of 0.6 mm to 1.3 mm can escape into the water and flow through it.

The inventive device with its variants is exemplified schematically by the figures

1 Compact system (without outflow system)

2 Ion generator and

3 Outflow system for water shown.

1

Blower / compressor

2

F7 filter

3

control system

4

ion generator

5

outflow

9

endcaps of the ion generator

10

outer glass tube of the ion generator

11

inner glass tube of the ion generator

12

first Electrode mesh of the ion generator

13

second Electrode mesh of the ion generator

17

Air distribution spiral

Of the Ion probe is built into the channel to measure the ion intensity. About a rule system In particular, the voltage and the pulse frequency in the ion generator regulated. The inflow of untreated water could also be controlled become.

Of the Energy consumption of the method according to the invention is 0.1 up to 1.5 watts / liter of water lower than in previously known methods, on average at 0.8 watts / liter.

With The newly developed ionization device achieves an extremely higher oxidation intensity Service. So far, ozone has been considered as the best possible oxidizer. Thus, the effectiveness is decidedly higher than in the conventional one Ozone treatment, which is currently practiced in all areas.

In Result of the oxidation process are also occurring odor nuisance neutralized.

• – Entkeimung von Salzlaken, Entkeimung von Brauchwasser und Entkeimung von Bearbeitungsräumen bei der Fleischverarbeitung,
• – Entkeimung von Wasser zur Flaschenspülung in der Getränkeindustrie,
• – Entkeimung von Wasser in Fischaufzuchtbecken,
• – Entkeimung von Prozesswasser zur Rückführung in Produktionsprozesse oder zur Rückführung in öffentliche Gewässer.

Examples of the treatment of organic and / or biologically contaminated water include the following uses:

• - degermination of brine, sterilization of process water and sterilization of processing rooms in meat processing,
• - degermination of water for bottle washing in the beverage industry,
• - sterilization of water in fish breeding tanks,
• - Sterilization of process water for recycling in production processes or for return to public waters.

One The current topic of drinking water treatment is pesticide residues (from agriculture), especially in the next few years the proportion of herbicides and other pesticides in raw water. Pesticides and insecticides have been widely used since 1970. Because nature usually only very difficult or impossible to break down these substances These are able to penetrate the soil into water-bearing layers arrives. One of the main representatives of herbicides is called atrazine. It is the most prominent representative of triazine herbicides. The mining capacity in nature amounts virtually zero. In contrast, to confirm the results of the invention the high oxidation activity the oxygen ions.

Around the effectiveness the germ killing to check was the device according to the invention used for the treatment of water, with a defined Amount of the bacterium Legionella pneumophila was vaccinated. To a starting concentration was chosen that was a massive (in exceptional cases) Load in aquifer Systems corresponds.

After this a first sampling to determine the existing bacterial concentration (zero value), the device was put into operation and at predetermined time intervals, water samples were taken taken and examined microbiologically.

The initial sampling showed a baseline concentration of 140,000 cfu / ml on Legionella (zero value). After sampling, the device was switched on. Already after one hour running time, one showed up Reduction of the used bacterial strain Legionella pneumophila from 140,000 cfu / ml to an undetectable concentration (KBE = Colony Forming Unit).

Claims (2)

Apparatus for the treatment of organic and / or biologically contaminated water with positive and negative oxygen ions as oxidation means comprising a tubular electrode connected to a pulsed high voltage ( 12 . 13 ) including ion generators ( 4 ) with this upstream filter ( 2 ) and controllable fan ( 1 ), the ion generator ( 4 ) associated control system ( 3 ) as well as an exit side to the ion generator ( 4 ) connected outflow system with widely arranged outflow openings ( 5 ) Comprises, characterized in that - the ion generator ( 4 ) an outer glass tube ( 10 ) and an inner glass tube ( 11 ), on the outside of which a first electrode mesh ( 12 ) and on the inside of a second electrode mesh ( 13 ) are made of stainless steel, comprising, and - the control system ( 3 ) includes an ion measuring sensor for controlling the voltage between 2300 and 6400 V and the pulse frequency between 4000 and 16000 Hz depending on its measurement result, and - the outflow system by means of a between a closed lower plate and the outflow openings ( 5 ) having a cover plate spirally extending, to the ion generator ( 4 ) connected air distribution channel ( 17 ) is formed, wherein the air distribution channel ( 17 ) has a height of 8 to 14 mm and the diameter of the outflow openings ( 5 ) Is 0.6 to 1.3 mm. Device according to claim 1, characterized in that - the first electrode mesh ( 12 ) has a mesh size of 0.6 to 1.5 mm and a material thickness of 0.2 to 0.8 mm and - the second electrode mesh ( 13 ) has a mesh size of 1.4 to 2.6 mm and a material thickness of 0.5 to 1.2 mm.