KR100802365B1 - Activated carbon-granule electrode filter - Google Patents

Abstract

An AC-GE(Activated Carbon-Granule Electrode) filter is provided to inhibit bacterial growth in the activated carbon and disinfect bacteria flown into the activated carbon by filling granular activated carbon with a large gain size into an activated carbon tank, disposing electrode sets at both sides of the granular activated carbon, and supplying a DC power to the electrode sets such that the granular activated carbon is electrified as a positive electrode. An AC-GE(Activated Carbon-Granule Electrode) filter includes: an upflow cylindrical chamber(10) having an inflow port(20) and an outflow port(30) formed on an upper part and a lower part thereof; a backwashing inlet(21) and a backwashing outlet(31) installed on the upper and lower parts of the cylindrical chamber to perform backwashing; electrode parts(40) of which at least one set is installed in upper and lower sides within the cylindrical chamber, and include a positive electrode plate, a negative electrode plate, and a spacer installed between the positive and negative electrode plates to maintain a gap between electrodes and prevent leakage of activated carbon; air diffusers(50) installed in a bottom part of the cylindrical chamber to supply bubbles during backwashing; a granular activated carbon(60) filled between the upper and lower electrode parts; and a rectification/control device(70) for converting an AC into a DC to supply a DC power to the electrode parts, wherein the positive electrode plates of the electrode parts are arranged to come in contact with the granular activated carbon.

Description

AC-WE filter {Activated Carbon-Granule Electrode Filter}

1 shows a perspective view of an AC-GE filter according to the invention.

Figure 2 shows an assembled cross-sectional view of the AC-GE filter according to the present invention.

Figure 3 shows an electrode assembly of the AC-GE filter according to the present invention.

Figure 4 shows a cross-sectional view of the electrode portion of the AC-GE filter according to the present invention.

<Description of the symbols for the main parts of the drawings>

10: chamber 20: inlet

21: backwash water inlet 30: outlet

31: backwash water outlet 40: electrode portion

41: (+) electrode plate 42: (-) electrode plate

43: spacer 44: electrode contact portion

45: electrode projection 46: guide

47: bolt 48: nut

50: diffuser 51: air inlet

60: granular activated carbon 70: rectifier / control device

80: wire 81: conduit

Field of invention

The present invention relates to an AC-GE filter with enhanced disinfection function and bioabsorbability, and more specifically, an upflow cylindrical chamber having inlets and outlets at upper and lower ends thereof; A backwash water inlet and a backwash water outlet installed at upper and lower ends of the cylindrical chamber for backwashing; One or more sets are respectively provided on the upper and lower sides of the cylindrical chamber, and a spacer is provided between the (+) electrode plate, the (-) electrode plate and the (+) electrode and the (-) electrode to maintain an electrode gap and prevent leakage of activated carbon. An electrode unit including; An air diffuser installed at a lower end of the cylindrical chamber to supply air bubbles during backwashing; Granular activated carbon filled between the upper and lower electrode portions; And a rectification / control device for supplying DC power to the electrode part by converting AC into direct current, wherein the positive electrode plate of the electrode part is arranged to be in contact with granular activated carbon.

Background of the Invention

Activated carbon is a black porous carbonaceous material made from carbonization of coconut shell, sawdust and coal. It has a large specific surface area and strong adsorption, and is used for removing odors, phenols, organic matter, color, and THM. Activated carbon treatment uses powdered activated carbon (PAC) and granular activated carbon (GAC), both of which are effective for adsorbing and removing odorous substances or trace organic substances. The activated carbon is porous and has a myriad of pores therein. The surface area of the layer of the pores is remarkably large, and the surface becomes hydrophilic to impurities. Thus, the removal of the soluble component as the substance to be adsorbed is accomplished by the soluble component adsorbing on the large inner surface of the pores. Conventional activated carbon tanks were filled with activated carbon and filled with water in a large capacity tank.However, the economical and installation area of the conventional activated carbon tank is large, and periodic backwashing is required due to the closing phenomenon of the activated carbon filler. Due to frequent cleaning of activated carbon and periodic replacement of activated carbon, there is a problem in management inconvenience, and there is a problem in that purification efficiency is lowered due to a problem of manpower and cost and a smaller contact area than activated carbon filling rate.

Related arts related to this are 'Activated carbon tanks for wastewater purification using liquid activated carbon' (Korean Patent Registration No. 10-0528633, 2005.11.08), 'Pressure type water purification facility for water supply' (Korean Patent Registration No. 10-0542425, 2006.01 .04), the technique prevents clogging of the filler and provides an easy-to-manage activated carbon tank, but has no function of inhibiting the growth of microorganisms in the activated carbon, which allows the growth of microorganisms in the treated water, which shortens the lifespan, Disinfectant function is weakened. In addition, the technique of 'removing nitrogen compounds in activated carbon-filled electrolyzer' (Korean Patent Application No. 10-2002-0023868, 2002.04.24) provides a method of removing nitrogen contained in wastewater and wastewater by electrochemical methods. However, as a treatment method for nitrogen compounds, microbial propagation is possible in activated carbon, and bacterial growth is not suppressed.

Accordingly, the present inventors have made diligent efforts to solve the shortcomings of the prior art. As a result, the activated carbon tank is filled with granular activated carbon having a large particle size, the electrode sets are disposed on both sides of the granular activated carbon, and then the DC activated power is supplied to the granular activated carbon. The present invention was completed by confirming that the cells were charged with (+) and disinfected into the bacteria introduced with the inhibition of bacterial growth in activated carbon.

The main object of the present invention is to provide an AC-GE filter with enhanced disinfection function and bioabsorbability.

In order to achieve the above object, the present invention is an upflow cylindrical chamber having an inlet and an outlet at the upper and lower ends; A backwash water inlet and a backwash water outlet installed at upper and lower ends of the cylindrical chamber for backwashing; One or more sets are respectively provided on the upper and lower sides of the cylindrical chamber, and a spacer is provided between the (+) electrode plate, the (-) electrode plate and the (+) electrode and the (-) electrode to maintain an electrode gap and prevent leakage of activated carbon. An electrode unit including; An air diffuser installed at a lower end of the cylindrical chamber to supply air bubbles during backwashing; Granular activated carbon filled between the upper and lower electrode portions; And a rectifier / control device for supplying DC power to the electrode part by converting AC into direct current, wherein the positive electrode plate of the electrode part is arranged to be in contact with granular activated carbon. Electrode) filter.

In the present invention, the (+) electrode plate of the electrode portion is a iridium titanium (IrO ₂ -Ti) electrode or a platinum titanium (Pt-Ti) electrode of the mesh or perforated form, the (-) electrode plate is a mesh Or in the form of perforated iridium titanium (IrO ₂ -Ti) electrode, platinum titanium (Pt-Ti) electrode, stainless steel and titanium, and the spacer is made of PVC, PE and PP in mesh form. It may be characterized by being insulated with any one resin selected from the group consisting of.

In the present invention, when the (+) electrode plate of the electrode portion is arranged in contact with the granular activated carbon, the electrode further includes a plurality of electrode protrusions attached to the contact surface of the (+) electrode plate, the DC power supply to the electrode portion In this case, the granular activated carbon may be characterized as being charged with (+).

In the present invention, the rectifier / control device is connected to the electrode portion, it can be characterized in that configured to enable the polarity switching.

Hereinafter, with reference to the accompanying drawings will be described in detail the present invention.

1 is a perspective view of the AC-GE filter according to the present invention, as shown in Figure 1, the AC-GE filter according to the present invention is a cylindrical chamber 10, inlet 20, outlet 30 , Backwash water inlet 21, backwash water outlet 31, electrode 40, diffuser 50, granular activated carbon 60, and rectification / control device 70. The cylindrical chamber 10 is determined in size, height, capacity, etc. according to the intended use. The inlet 20 is located in the lower portion of the cylindrical chamber, the outlet 30 is located in the upper portion of the cylindrical chamber has an upstream water flow, less flow path obstruction than the conventional activated carbon filter, the backwash period is longer. The linear velocity of the influent through the activated carbon bed can be from 2m / h to 15m / h depending on the influent quality, target water quality and treatment capacity.

Figure 2 shows an assembled cross-sectional view of the AC-GE filter according to the present invention, Figure 3 shows an electrode assembly of the AC-GE filter according to the present invention, Figure 4 is an AC-GE according to the present invention The electrode section of the filter is shown in cross section. As shown in Figs. 2, 3, and 4, one or more sets of the electrode units are respectively provided on the upper and lower sides of the cylindrical chamber, and can be installed in various numbers according to the use place and the capacity of the chamber, and used in the electrode unit. The electrodes to be used may be installed one at each of the upper and lower sides according to their capacitance, but more preferably, they are divided into a plurality of sets of small electrodes in parallel in consideration of the load applied to the electrodes and the amount of current applied to the electrodes. desirable. In addition, it is preferable to uniformly manufacture the size of the unit electrode for smooth after-care.

The electrode part includes a positive electrode plate, a negative electrode plate, and a spacer for maintaining an electrode gap between the positive and negative electrodes and preventing leakage of activated carbon. The positive electrode plate of the electrode unit is a iridium titanium (IrO ₂ -Ti) electrode or a platinum titanium (Pt-Ti) electrode of the mesh or perforated form, the (-) electrode plate is a mesh or perforated form It is selected from the group consisting of cerium titanium (IrO ₂ -Ti) electrode, platinum titanium (Pt-Ti) electrode, stainless steel and titanium, the spacer is in the form of a mesh having a mesh size of about 1 ~ 2mm size. Insulated with any one resin selected from the group consisting of PVC, PE and PP to maintain electrode spacing and prevent shorts due to leakage of activated carbon. In addition, provided with a guide in the form of a window frame, the guide serves to fix the electrode portion, and withstand the load of the granular activated carbon. The material of the guide may be selected from the group consisting of PVC, PE and PP which are non-conductive materials. In the guide, the electrode part is fixed in the order of (+) electrode plate, spacer, (-) electrode plate, and it is possible to fix the electrode part more tightly by using bolts and nuts, and the bolts and nuts have a risk of short circuit. Therefore, it is preferable to use a nonconductive material.

The diffuser is installed at the lower end of the cylindrical chamber, the air injected from the air inlet is bubbled through the diffuser, and supplies bubbles during backwashing.

Granular activated carbon is filled in the upper and lower electrode portions, and the (+) electrode plate of the electrode portion is arranged to contact the granular activated carbon, and further includes a plurality of electrode protrusions attached to the contact surface of the (+) electrode plate. The contact between the electrode surface and the granular activated carbon is improved. When DC power is supplied to the electrode portion, the granular activated carbon is charged with (+) to create an environment in which microorganisms cannot exist. Conventional activated carbon has a high surface area and excellent adsorption function, high risk of microbial breeding has a short lifespan, but the disinfection function of the activated carbon according to the present invention is added by granulation electrode to prevent the microorganism from being present. There is no risk of bacterial propagation, and the incoming microorganisms are also killed by the potential difference and the generated radicals, so that the backwash cycle of activated carbon is long and its life is long.

The rectifier / control device is installed outside the cylindrical chamber and converts alternating current into direct current to supply direct current power to the electrode, and is preferably configured to allow polarity switching by a timer or other current amount change. AC-GE filter according to the present invention is to reverse the (+), (-) in the electrode unit by supplying the polarity for 10 to 30 seconds alternately, to prevent inorganic substances such as Mg, Ca that can be attached to the (-) pole It can be detached to maintain a clean electrode state, it is possible to always maintain a good energized state by removing the scale attached to the electrode through the polarity transfer. The polarity switching can be automatically switched when the amount of power decreases more than a certain amount compared to the initial input power because the input power is gradually reduced as a method of periodically switching by the timer and the scale of the electrode surface. On the other hand, the suspended solids attached to the activated carbon layer can be removed through a periodic or irregular backwashing process, while the backwash water is injected into the upper backwash water inlet while the air is injected from the diffuser disposed in the lower portion of the cylindrical chamber. By discharging the backwash water outlet, it is possible to remove suspended solids that may adhere to the activated carbon. The backwashing period can be carried out irregularly by increasing the pressure in the tank or decreasing the discharge amount, and can be periodically backwashed by a timer.

Hereinafter, the operation principle of the AC-GE filter according to the present invention will be described in detail.

When the water to be treated is introduced through an inlet provided in the lower portion of the cylindrical chamber and DC power is supplied to the electrode portion, granular activated carbon filled between the upper and lower electrode portions is charged with (+). In the (+) charged granular activated carbon, an environment in which microorganisms cannot exist is created, and the treated water passing through the AC-GE filter according to the present invention is sterilized and purified while passing through the granular activated carbon layer to The treated water is discharged to an outlet located above. The voltage supplied to the electrode part is preferably 5-10V, more preferably 10V, and economical design is possible under the voltage condition, and maintenance cost is reduced. At this time, it is preferable that the electrode area is designed so that a current of 0.7 A / L · min can be maintained. The passage time of the activated carbon layer of the influent is 10 minutes to 30 minutes, more preferably 15 minutes, and the contact time can be adjusted according to the water quality of the water to be treated and the expected water quality of the treated water. The linear velocity of inflow water through the activated carbon layer is preferably 2m / h ~ 15m / h, but as the linear velocity increases, the height of the activated carbon layer increases, so that the middle part of the activated carbon layer may generate an area that is not disinfected by voltage drop. It is preferable to keep at 5 m / h.

The AC-GE filter according to the present invention can be used in places where water quality improvement and disinfection are required, such as water purification plants, simple water purification plants, inflow pipes of aggregate buildings (schools, apartments, buildings, military units), inflow pipes of homes, water purifiers, and industrial process water. have. In the case where the water quality to be treated in various places where the AC-GE filter according to the present invention is installed is good, only the AC-GE filter may be applied. When the water quality to be treated is not good, Element Filter, Sand Filter, MF or After passing through a filter such as UF Membrane, an AC-GE filter can be installed to purify the water more efficiently.

Having described the specific parts of the present invention in detail, it will be apparent to those skilled in the art that such specific descriptions are merely preferred embodiments, and thus the scope of the present invention is not limited thereto. will be. Thus, the substantial scope of the present invention will be defined by the appended claims and their equivalents.

As described in detail above, the present invention has the effect of providing an AC-GE filter with enhanced disinfection function and bioabsorbability. AC-GE filter according to the present invention is added to the disinfection function in addition to the adsorption function, the need for backwashing used when the flow path is closed in the conventional activated carbon filter is easy to operate, the additional cost of backwashing is reduced, activated carbon Long service life reduces operating costs. In addition, microorganisms cannot be inhabited in the activated carbon layer due to granulation electrode of activated carbon, and microorganisms from the outside are also killed, so that activated carbon is always maintained in a clean state. It does not have the effect of saving energy. In addition, when the AC-GE filter is backwashed, the inorganic material may be detached through polarity switching, and microorganisms may be present inside the chamber by charging the granular activated carbon to a positive value by applying DC power to the electrode. By reducing the risk of bacterial propagation by reducing the environment, the water molecules are reduced due to electrical energy, and the bioabsorption is improved, thereby providing better water quality.

Claims (4)

An upflow cylindrical chamber having inlets and outlets at upper and lower ends thereof; A backwash water inlet and a backwash water outlet installed at upper and lower ends of the cylindrical chamber for backwashing; One or more sets are respectively provided on the upper and lower sides of the cylindrical chamber, and a spacer is provided between the (+) electrode plate, the (-) electrode plate and the (+) electrode and the (-) electrode to maintain an electrode gap and prevent leakage of activated carbon. An electrode unit including; An air diffuser installed at a lower end of the cylindrical chamber to supply air bubbles during backwashing; Granular activated carbon filled between the upper and lower electrode portions; And AC / GE (Activated Carbon-Granule Electrode), characterized in that the rectifier / control device for supplying the DC power to the electrode portion by converting the alternating current to AC, the positive electrode plate of the electrode portion is arranged in contact with the granular activated carbon ) filter. According to claim 1, The positive electrode plate of the electrode portion is a mesh or perforated iridium titanium (IrO ₂ -Ti) electrode or platinum titanium (Pt-Ti) electrode, and the (-) electrode plate It is selected from the group consisting of iridium titanium (IrO ₂ -Ti) electrode, platinum titanium (Pt-Ti) electrode, stainless steel and titanium in mesh or perforated form, and the spacers are PVC, PE and PP in mesh form. AC-GE filter, characterized in that insulated with any one resin selected from the group consisting of. The method of claim 1, wherein when the (+) electrode plate of the electrode unit is arranged in contact with the granular activated carbon, the electrode unit further includes a plurality of electrode protrusions attached to the contact surface of the (+) electrode plate, and the direct current power source is supplied to the electrode unit. AC-GE filter, characterized in that when activated, the granular activated carbon is charged with (+). The AC-GE filter according to claim 1, wherein the rectifying / controlling device is connected to the electrode part and configured to enable switching of the polarity by a timer or a current amount change.

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