KR102564892B1 - electric water purification apparatus - Google Patents

Abstract

The present invention relates to an electric water purification device, and more particularly, to an electric water purification device capable of decomposing and purifying contaminants contained in a large amount of contaminated water in a relatively short time.

Description

Electric water purification apparatus {electric water purification apparatus}

The present invention relates to an electric water purification device, and more particularly, to an electric water purification device capable of decomposing and purifying contaminants contained in a large amount of contaminated water at high pressure in a relatively short time.

With the development of industrial technology, industrial wastewater, waste gas, and waste containing many hazardous substances and non-degradable substances are generated, and research for efficient treatment of these pollutants is being actively conducted.

Particularly, as one of the wastewater treatment methods, an underwater plasma generating device is known in which an electrode is immersed in wastewater to be treated, and then discharged by applying a high voltage pulse to the electrode to generate active radicals in water to perform purification treatment.

However, in such an underwater plasma generator, since the electrodes for generating discharge are submerged in water, electricity applied to the electrodes is conducted through wastewater, so plasma generation is not easy, so there are many problems in practical application.

In addition, among various active components generated by plasma, such as radicals, ions, and ozone, radicals and ions have a very high reactive activity, but have a very short lifespan, so if they are not contacted with water immediately after they are generated, they lose their activity soon. there is

Therefore, in order to effectively use the electric energy used in the production of these active ingredients, it is necessary to contact water immediately after the active ingredients are generated and to maximize the reaction rate.

Conventionally, as a method for efficiently purifying contaminated water and removing microorganisms such as bacteria, a method of purifying the contaminated water by generating plasma-treated air or mixed gas in the form of fine bubbles is known.

1 is described in Korean Patent Registration No. 10-0932377, and shows such a plasma water treatment device.

That is, in order to generate plasma in water, a transparent quartz tube, a conductive discharge electrode inserted inside the transparent quartz tube, and the outer surface of the transparent quartz tube are contacted to concentrate the maximum potential gradient at the conductive discharge electrode to form a high-density plasma region in the discharge electrode. A torch head having a conductive counter electrode to be formed, an inlet for injecting air or gas into the transparent quartz tube, and a high-voltage cable inlet.

In addition, a porous bubble device is installed at the lower end of the transparent quartz tube, and fine bubbles are supplied into the water while the gas discharged from the transparent quartz tube passes through the pumping.

The gas is finely divided by the porous bubble device and dispersed in the form of microbubbles in water, thereby increasing the contact time and surface area of high-concentration active species such as ozone and OH radicals in the plasma-treated gas with water, and dissolution of high-concentration active species It is possible to increase the efficiency of water treatment by greatly increasing the rate and catalytic oxidation decomposition.

Among such configurations, the conventional porous bubble device is composed of a foam material such as a sponge or a porous structure called an air stone, so that gas is divided into fine bubbles and discharged into water while passing through the porous structure.

However, the complex porous structure of the conventional porous bubble device plays an effective role in allowing the pressurized gas to be finely divided and discharged into microbubbles as it passes through. There is a problem in that gas permeability gradually decreases when used for a long time due to a high possibility of jamming from the inside.

This causes the generation efficiency of microbubbles to be lowered and the water treatment efficiency to be lowered.

In addition, there is a problem in that it is difficult to use it as a large-capacity contaminated water purification treatment apparatus as a structure in which contaminated water using conventional plasma is accommodated in a water tank and purifies pollutants by ejecting the plasma-treated gas into fine bubbles in the water tank in a stagnant state.

Korea Patent Registration 10-1579349 Korean Patent Publication No. 10-2018-0042886 Korean Patent Publication No. 10-2019-0055929 Korea Patent Registration 10-1753969 Korea Patent Registration 10-1955898

The present invention has been made to solve the above problems, and measures the temperature and flow rate to cut off high pressure when wastewater does not flow, and measures the state of wastewater as the treatment efficiency changes according to the state of incoming wastewater (pH and electricity). conductivity) to provide an electric water quality purification device.

In addition, the present invention provides an electric water purification device having a structure capable of decomposing and purifying pollutants contained in a large amount of contaminated water in a relatively short time by smoothly supplying ozone and bubbles to contaminated water and applying high pressure thereto. has a purpose to

In order to solve the above problems, the present invention is a water tank into which contaminated water is introduced; an ozone generating device for inhaling ozone into the contaminated water as a part through which the contaminated water flows; a circulation motor that circulates the contaminated water from the ozone generator to the electric water purification module; an electric water purification module composed of internal electrodes and external electrodes for purifying the contaminated water circulated from the circulation motor; It includes a high-voltage generator that is electrically connected to the electric water purification module to provide a high-voltage current, and a controller box that controls it.

When the contaminated water does not flow, a device for measuring temperature and flow rate is included to block high pressure.

Since treatment efficiency changes according to the state of the contaminated water, a device for measuring pH and electrical conductivity is included.

It further includes; a flow sensor and a temperature sensor for measuring the flow rate and temperature of the contaminated water.

It further includes a PH sensor and a conductivity sensor for measuring the PH sensor and conductivity of the contaminated water.

The inner electrode and the outer electrode are mesh type and made of stainless steel including aluminum, copper, and silver.

The controller box further adds a safety device for turning off the high-pressure generator when the treated wastewater does not flow.

The PH sensor and the conductivity sensor are connected to an IOT module for transmitting measured values of pH and conductivity through a network in order to analyze the state of wastewater to be treated.

The present invention made as described above can maximize the reaction rate.

In addition, the present invention maximizes the contact area, so that the reaction rate is fast, and organic contaminants and microorganisms in the water can be effectively removed.

In addition, according to the present invention, even when foreign substances are included in the plasma-treated gas, clogging by foreign substances can be prevented or minimized in the area where microbubbles are generated.

In addition, the present invention can purify a large amount of contaminated water in a continuous flow state, so that the purification treatment action is continuously performed without interruption, and a large amount of contaminated water can be purified in a short time, and the water treatment device is very compact. ), so it can be installed even in a narrow or limited installation space.

1 is a view showing a water purification device according to the prior art.
2 is a diagram showing a schematic configuration of an electric water quality purification device according to an embodiment of the present invention.
3 is a view showing a configuration in which a flow sensor or the like is attached to an electric water quality purification device according to an embodiment of the present invention.
4 is a view showing a configuration in which a PH sensor and a conductivity sensor are attached according to another embodiment of the present invention.
5 is a view showing a configuration in which a plurality of water tanks are connected and divided according to contamination levels according to another embodiment of the present invention.

In order to fully understand the present invention, preferred embodiments of the present invention will be described with reference to the accompanying drawings. Embodiments of the present invention may be modified in various forms, and the scope of the present invention should not be construed as being limited to the examples described in detail below. This embodiment is provided to more completely explain the present invention to those skilled in the art. Therefore, the shapes of elements in the drawings may be exaggerated to emphasize a clearer description. It should be noted that in each drawing, the same members are sometimes indicated by the same reference numerals. In addition, detailed descriptions of well-known functions and configurations that may unnecessarily obscure the subject matter of the present invention are omitted.

The present invention includes a water tank 50, an ozone generator 10, a circulation motor 20, an electric water purification module 30, and a controller box 40.

Specifically, the present invention includes a water tank 50 into which contaminated water flows; an ozone generating device 10 that sucks ozone into the contaminated water as a part through which the contaminated water flows; a circulation motor 20 circulating the contaminated water from the ozone generator 10 to the electric water purification module 30; An electric water quality purification module 30 composed of internal electrodes 1 and external electrodes 2 for purifying the contaminated water circulated from the circulation motor 20 is included.

The electric water purification module 30 may be additionally connected to a plasma processor, a plasma module, a plasma discharge unit, etc. described in the following embodiments, but only the installation position (inlet or outlet direction of the electric water purification module) is similar, and its performance is It may be different and a plurality may be installed.

In addition, the present invention includes a high-voltage generator electrically connected to the electric water purification module 30 to provide a high-voltage current, and a controller box 40 that controls it.

The high-voltage generator may be installed in the controller box 40 or may be installed independently outside, preferably applying a voltage of 15 kV to 18 kV (effective value), a plasma processor for activating plasma gas, a plasma module, It can be installed like a plasma discharge unit.

In addition, the present invention includes a flow sensor and temperature sensor 45 for measuring the flow rate and temperature of the contaminated water, and a PH sensor and conductivity sensor 25 for measuring the PH sensor and conductivity of the contaminated water.

The inner electrode 1 and the outer electrode 2 are mesh type and made of stainless steel including aluminum, copper, and silver.

The controller box 40 may further add a safety device for turning off the high pressure generator when the contaminated water does not flow.

That is, the safety device further includes a measurement sensor for measuring whether the contaminated water flows.

The PH sensor and the conductivity sensor 25 are connected to an IOT module for transmitting measured values of pH and conductivity through a network in order to analyze the state of wastewater to be treated.

By connecting with the electric water quality purification device through the IoT module, the user can monitor and control anytime, anywhere.

As an embodiment, the IOT module transmits the pH and conductivity measured values through the network to analyze the state of the wastewater to be treated by the PH sensor and the conductivity sensor 25, and generates an alarm when the measured values exceed a certain value. The generated signal is transmitted to an alarm unit (not shown).

In addition, as another embodiment, the IOT module converts data of a certain protocol and transmits it.

That is, the protocol rules for measurement values generated by the PH sensor and conductivity sensor 25 include a rule for increasing the weight of one measurement value of PH or conductivity according to the purpose of current purification.

These weights can be displayed and changed through an app or web display device, and are uploaded to an optimal server for efficient processing, management, and monitoring of data delivery.

The server individually manages the IOT module and can track which purifier the data came from, so that a quick response is possible with an alarm.

Example 1

The electric water purification module 30 includes a gas mixing unit having an inlet through which contaminated water flows in and a gas intake hole through which the plasma-treated gas from the outside is sucked into the inside as a part through which the contaminated water flows in, and , a discharge part from which the contaminated water mixed with the gas is discharged from the gas mixing part, a connection passage connected to the gas suction hole, and a gas suction hole connected to the connection passage to treat gas with plasma and supplying the gas to the gas suction hole through the connection passage It further includes a plasma processor for

The plasma processor arranges a cylindrical internal electrode inside the cylindrical dielectric and arranges a cylindrical external electrode outside the dielectric, adjusts the distance difference between the end of the internal electrode and the end of the dielectric and the distance between the end of the dielectric and the end of the external electrode, , the discharge voltage and the length and shape of the jet discharge flame are controlled by adjusting the end shape of the external electrode.

The plasma processor includes an electric water quality purification module 30 connected to the discharge pipe in a continuous manner and formed with a mesh through which contaminated water discharged from the discharge pipe passes, and generates plasma around the electric water quality purification module 30 to Ultraviolet rays and shock waves are transmitted to the inside of the electric water purification module 30.

In addition, in the present invention, the inlet, the electric water purification module 30, and the outlet are connected to each other through a continuous conduit.

The cross-sectional area through which the polluted water flows in the electric water quality purification module 30 is smaller than the cross-sectional area through which the contaminated water flows in the inlet so that the flow rate in the electric water purification module 30 increases compared to the inlet, The gas supplied to the gas intake hole installed in a certain portion of the water purification module 30 is naturally sucked by the pressure drop due to the increase in the flow rate of the contaminated water as the cross-sectional area of the electric water purification module 30 decreases. and is introduced into the contaminated water.

In addition, in the present invention, the plasma treatment device is installed outside the electric water quality purification module 30 and generates plasma, and the plasma generating electrode is installed to face the plasma generating electrode at a distance from each other, and the electric water quality It includes a gas flow pipe surrounding the outside of the electric water quality purification module 30 and the plasma generating electrode so that the gas flows through the space between the purification module 30.

Therefore, the gas flowing in the space between the electric water purification module 30 and the gas flow pipe can be plasma treated by the plasma generating electrode and supplied to the gas suction hole.

Example 2

The high voltage generator according to the present invention applies a voltage of 15 kV to 18 kV (effective value), and the purification efficiency of the electric water quality purification module 30 measured for each application time is shown in Table 1 below.

That is, it was found that the initial concentration was completely removed after about 6 minutes when the concentration was 3.5 mg/L, about 10 minutes when the concentration was 8.75 mg/L, and about 14 minutes when the concentration was 17.5 mg/L.

Table 1 below shows the removal efficiency after 10 minutes of other organic matter and Escherichia coli measured under operating conditions of a voltage of 15 kV to 18 kV (effective value).

As shown in Table 1, it was found that 100% of Acid Red 4, Orange Ⅱ and Escherichia coli were removed in 10 minutes.

In particular, comparing before and after treatment of Orange II, it was found that E. coli was removed.

Therefore, it was found that the present invention is very effective for water treatment in a wastewater treatment device.

Example 3

In the present invention, a hollow part is formed inside the electric water purification module 30 or an additionally installed plasma module to purify the contaminated water in the water tank 50 containing the wastewater.

The inside of the plasma module includes a ceramic membrane with a plurality of pores, a gas inlet through which external gas flows, and a plasma discharge unit for activating the introduced gas by generating an electric discharge from the high-pressure generator to supply the activated gas to the electric water purification module ( 30) is supplied within.

Therefore, the plasma module introduces gas into the electric water purification module 30, applies a voltage to the discharge electrode to generate plasma to activate the introduced gas, and the activated gas is supplied into the electric water purification module 30 to prevent contamination. Water can be purified.

The plasma discharge unit in the plasma module may include a discharge electrode extending in a longitudinal direction and generating plasma by applying a voltage, and a dielectric tube surrounding an outer surface of the discharge electrode.

In this case, the discharge electrode may be made of stainless steel, carbon steel, copper, brass, titanium, tungsten or molybdenum, and the dielectric tube may be made of a quartz tube, glass tube or ceramic tube.

For example, the plasma module is composed of a discharge electrode and a dielectric tube, and the discharge electrode is formed of a conductive material such as stainless steel, carbon steel, copper, brass, titanium, tungsten or molybdenum, and a dielectric tube is formed on the outer surface. is formed

In particular, the dielectric tube can limit the amount of electric charge delivered by one micro-discharge and spread the micro-discharge to the entire electrode.

To this end, the dielectric tube may be made of a material having a high dielectric constant. For example, it may be made of glass, quartz or ceramic.

Example 4

An air fan for forcibly sucking outside air is installed in the electric water purification module 30, and a high voltage generator is installed on the discharge electrode (+ pole) and the ground electrode (- pole) installed facing each other inside the air intake pipe that is interviewed with the air fan outlet. By applying the high voltage generated between the two discharge electrodes by applying the high voltage generated between the two discharge electrodes, a very high field electron energy band is generated, and fresh outdoor air passes through this energy band, and a very high field electron in the fresh outdoor air Energy is applied to generate nitrogen ions [N], oxygen ions (O, ), and hydroxyl ions (OH-) through electrochemical reactions such as dissociation, excitation, ionization, oxidation, and reduction reactions, and the generated ions are transferred to a circulation motor ( 20) can be used to purify contaminated water by supplying and spraying to the electric water purification module 30.

Example 5

In one embodiment of the present invention, the additionally installed control unit depressurizes the AC power of the high-voltage generator in the transformer, converts the AC power into DC power for which the appropriate power value is selected between 15kV and 18kV in the rectifier, and converts it into DC power to generate electric power. DC power may be applied to the water purification module 30 to perform a high-voltage electrolysis reaction between adjacent anodes and cathodes.

Example 6

The electric water purification module 30 according to the present invention can perform electrical cell lysis through the internal electrode 1 and the external electrode 2, and destroys the cells by applying an electric field to the cells to generate a difference in membrane potential of the cells way to do it

There is an aspect similar to other cell lysis methods such as the freeze-thaw method, the heating method, and the osmotic shock method in that the shock is applied to the cell wall.

However, these methods can easily destroy cells by giving them thermal shock.

The electrical method uses the principle of dielectrophoresis. Neutral particles such as microbial cells become polarized when placed in a non-uniform electric field, and a force acts on the particles due to the non-uniform electric field. This force causes the suspended cells to move, causing the cells to lyse.

As another example, the general electric field strength is inversely proportional to the distance between the electrodes for a given voltage, and the electric field strength increases as the distance between the electrodes decreases.

The flow of charge in a conductor or medium between two points having a potential difference is called current. Current between the electrodes is achieved by ions that can change within cells or charged particles within tissues.

Using this principle, it can be used to effectively facilitate cell destruction of the electric water quality purification module 30.

Example 7

As shown in FIG. 4, a flow sensor and a temperature sensor 45 for measuring the degree of filtration of water passing through a graphene filter (not shown) installed between the electric water purification module 30 and the water tank 50, and the It is preferable to include a control unit for receiving measured data from the flow sensor and the temperature sensor 45 and controlling a flow valve installed in a pipe connecting the filter housing and the sewage storage tank.

In addition, the graphene filter includes a bypass valve installed in a pipe connecting the outlet of the filter housing and the water tank 50 to control the flow of water supplied to the water tank 50, and the bypass valve and the water tank 50. It is preferable to include a bypass pipe connected to ) and a bypass pump for supplying the water supplied to the bypass pipe to the water tank 50.

The manufacturing method of the graphene filter is manufactured by electrospinning and coating a polymer on the surface of a substrate and coating graphene on the surface of the coated polymer, so that a graphene filter can be manufactured quickly and at low cost, and coating Since the formed graphene does not easily fall off, a high-quality graphene filter can be manufactured.

In addition, since the polymer is electrospun and the graphene is coated on the polymer as described above, various types of substrates can be used without being limited by the thickness and shape of the substrate.

In addition, since the polymer and graphene coated on the substrate can be patterned in various ways, the graphene filter can be manufactured according to the characteristics of the water treatment facility in which the graphene filter will be installed, thereby maximizing the water purification ability of the graphene filter.

Example 8

The present invention dissociates, ionizes, excites, and oxidizes water molecules in the fluid and contaminants in the water by applying the electric field energy generated by the high voltage discharge to the anode and cathode of the high voltage generator, and dissociates, ionizes, excites, and oxidizes water molecules in the fluid by water discharge in the contaminated water at the discharge electrode of the high voltage generator. It further enhances electrochemical reactions such as , reduction reactions, degassing of active gases, and activity.

In addition, the organic substances contained in the water are decomposed first, and a plurality of discharge electrodes constituting anode and cathode of various materials are installed inside the reaction tank connected to the treated water pipe, and the discharge electrode is operated by the control program of the additionally installed control unit. Electrolysis is performed by supplying controlled power to generate oxygen, hydrogen, zinc ions, aluminum ions, and oxalate ions to remove cationic substances such as scale components, chloride ions, sulfate ions, and pollutants in water. divide by 2

At the same time as the secondary electrolysis process, the quantum energy generated by the braking radiation method installed on the outer side of the body of the electric water purification module 30 is irradiated to the water to be treated (contaminated water) to further increase the activity of ions in the water.

As the contact time with the pollutants in the water is increased by further extending the movement path of the ions, contaminants such as scale components and acid ions are reduced, and then the sedimentation tank added to the water tank 50 is added to the process described above. The decomposed contaminants are precipitated and recovered.

In the microbial reactor (not shown) additionally installed according to the present invention, the oxidative decomposition process by microorganisms supported on the carrier of the filter and the oil in the emulsion state in the metal hydroxide hydrate layer are filtered and circulated or discharged. (50) is given again.

On the other hand, it passes through the discharge electrodes installed facing each other inside the cell of the high voltage discharge unit, and an electric field energy band is formed between the discharge electrodes by the very high voltage generated in the high voltage discharge unit, and the air passing through this electric field energy band is dissociated and excited. , Oxygen ion [O], nitrogen ion (N), and active gas such as OH- Radical are generated through electrochemical reactions such as ionization, oxidation, and reduction reactions. Activated gas is supplied to the water to be treated through the diffuser 201 installed inside.

In addition, in the present invention, since the discharge space is formed by the high field energy applied to the air, nitrogen molecules (N ₂ ) constituting 79% of the air in the discharge space and oxygen constituting 21% Molecules (O ₂ ) are decomposed into nitrogen and oxygen atoms by decomposition of covalent bonds between nitrogen and oxygen molecules due to the high voltage applied by the discharge electrode.

Accordingly, nitrogen atoms and oxygen atoms undergo a rapid ionic reaction to produce nitrous oxide (NO) and trace amounts of nitrous oxide (N ₂ O) and nitrogen dioxide (NO ₂ ). At this time, dissociation, ionization, oxidation, and reduction The reaction can be done as follows.

[Dissociation reaction]

[Ionization reaction]

[oxidation reaction]

[Reduction reaction]

Example 9

One side of the electric water purification module 30 is connected to a high-voltage generator and the other side is grounded, and a pair of electrodes are installed facing each other and spaced apart from each other.

Dielectrics are installed to face each other on the surface of the electrodes of the electric water purification module 30 facing each other, a discharge gap is formed in one of the dielectrics, and a conductor electrode having a protrusion is provided in the dielectric discharge gap. .

An electric field of pulsed DC or AC power in a frequency band of 50 Hz to 10 GHz is applied to the electrode at an intensity of 15 to 18 KV/cm through a high-voltage generator.

10: ozone generator
20: circulation motor
30: Electric water purification module
40: controller box
50: water tank

Claims (8)

a water tank 50 into which contaminated water flows;
an ozone generating device 10 that sucks ozone into the contaminated water as a part through which the contaminated water flows;
a circulation motor 20 circulating the contaminated water from the ozone generator 10 to the electric water purification module 30;
an electric water purification module 30 composed of internal electrodes 1 and external electrodes 2 for purifying the contaminated water circulated from the circulation motor 20;
A controller box 40 including a high-voltage generator electrically connected to the electric water purification module 30 and providing high-voltage current, and controlling it;
Since the treatment efficiency changes according to the state of the contaminated water, a device for measuring pH and electrical conductivity and transmitting the measured values to the IoT module;
A flow sensor and a temperature sensor 45 for measuring the flow rate and temperature of the contaminated water;
When the contaminated water does not flow, a device for measuring temperature and flow rate and transmitting the measured value to the IoT module in order to cut off the high pressure;
A PH sensor and a conductivity sensor 25 for measuring the PH sensor and conductivity of the contaminated water;
The PH sensor and conductivity sensor 25 is an IOT module that transmits measured values of pH and conductivity through a network to analyze the state of wastewater to be treated, and generates an alarm when the measured values exceed a certain value; connected,
The inner electrode 1 and the outer electrode 2 are mesh type and made of stainless steel including aluminum, copper, and silver,
The electric water purification module 30 includes a gas mixing unit having an inlet through which contaminated water flows in and a gas intake hole through which the plasma-treated gas from the outside is sucked into the inside as a part through which the contaminated water flows in, and , a discharge part from which the contaminated water mixed with the gas is discharged from the gas mixing part, a connection passage connected to the gas suction hole, and a gas suction hole connected to the connection passage to treat gas with plasma and supplying the gas to the gas suction hole through the connection passage Further comprising a plasma processor for
The plasma processor arranges a cylindrical internal electrode inside the cylindrical dielectric and arranges a cylindrical external electrode outside the dielectric, adjusts the distance difference between the end of the internal electrode and the end of the dielectric and the distance between the end of the dielectric and the end of the external electrode, , An electric water quality purification device characterized in that the discharge voltage and the length and shape of the jet discharge flame are controlled by adjusting the end shape of the external electrode. delete delete delete delete delete According to claim 1,
Electric water purification device, characterized in that the controller box (40) further adds a safety device for turning off the high pressure generator when the contaminated water does not flow. delete