KR20130002910A - A system for generating and processing alkaline water used in car washing center - Google Patents

Abstract

PURPOSE: A car-washing apparatus, and a water treatment system for a car wash comprising the same are provided to reduce the used amount of water by continuously generating and using alkaline water with a single phase, and re-using the alkaline water which is used for washing a car. CONSTITUTION: A car-washing apparatus uses alkaline water which is generated by electrolyzing water. The car-washing apparatus comprises an ionized water generator(200), an alkaline water supply unit, and a washing unit. The ionized water generator comprises an electrolysis cell, a direct current supply device, a positive liquid electrode storage tank, a negative electrode liquid storage tank, a first flow unit and a second flow unit, and a plurality of flow line. The flow lines have the positive electrode or negative electrode liquid to selectively flow and acidic water and alkaline water to selectively flow. The flow lines comprise an acidic water supply line and an alkaline water discharge line. The alkaline water discharge line discharges the alkaline water in the negative electrode liquid tank to the alkaline water supply unit.

Description

Car wash apparatus using alkaline water and car wash water treatment system having same {A system for generating and processing alkaline water used in car washing center}

The present invention relates to a car wash apparatus, and more particularly, to a car wash apparatus using alkaline water for washing the vehicle using alkaline water obtained by electrolysis of water instead of the detergent used in the car wash. The present invention also relates to a car wash water treatment system for reusing alkaline water used for washing.

As the number of vehicles increases, the number of car washes increases, and the amount of wastewater generated increases. Wastewater discharged from the car wash contains oil and synthetic detergents, and these components are difficult to treat microorganisms or physicochemically, causing serious water pollution. In addition, in order to reuse such wastewater, it is possible to introduce a high-purity water treatment facility, etc., but in terms of economics, it is difficult to easily introduce the car wash, and the general physicochemical method has a problem that the recycling rate is significantly reduced.

Therefore, many efforts have been made to reuse water in the car wash, but the process is complicated and the required space is largely unrealistic. In the case of the car wash, a detergent-free washing method using water only may be introduced, but this has a disadvantage in that it does not satisfy the satisfaction of consumers after washing.

On the other hand, alkaline waters obtained by electrolyzing water are generally reported to have a detergency (野 桂, 飯 田敬子, 千 葉昌彦, "機 水, 平 成 20 年度 靑 森 縣 産業 技術 セ ン タ)工業 部門 事業 報告 書, 115–118).

In general, an ionized water generator is configured to generate acidic water, which is acidic water in the anode chamber, and alkaline water, which is alkaline water, in the cathode chamber by applying a direct current while passing water between the anode chamber and the cathode chamber with the diaphragm interposed therebetween. do. Acidic water generated through such an ionized water generator is used for sterilization purposes, and alkaline water is used for cleaning contaminants and rustproofing of metals.

As described above, a method for generating acidic water and alkaline water by electrolyzing water is well known, and a number of prior art are disclosed. These prior arts commonly have an electrode pair consisting of an anode (an electrode in which an oxidation reaction occurs) and a cathode (a cathode in which a reduction reaction occurs), and a neutral membrane or an ion exchange membrane is disposed between the anode and the cathode. It is configured to electrolyze water using the configured electrolysis cell.

1 is a principle diagram of an electrolysis apparatus for producing acidic water and alkaline water by electrolyzing general water. On the other hand, there are many prior arts related to the production of acidic and alkaline water in addition to using the electrolysis device as shown in Figure 1, the principle of these are as follows.

Acid water and alkaline water are produced through a two-chamber electrolytic cell in which the anode and cathode are divided into diaphragms. That is, the feed chloride as an electrolyte in the case of (chloride ions) are present, the anode in the anode chamber of chloride ion (Cℓ ^-), which is oxidized chlorine (Cℓ ₂₎ gases are generated (Scheme 1), and at the same time the water Oxidation generates oxygen (O ₂ ) (Scheme 2). At this time, the generation rate of chlorine and oxygen is determined by the electrochemical catalyst of the positive electrode, the chlorine-based generation efficiency is about 20 ~ 30% when the concentration of 2,000ppm NaCl in water. The produced oxygen is not dissolved in water (solubility 8ppm) but is gasified and discharged to the outside of the electrolysis cell. However, chlorine is dissolved in water (solubility of about 10,000 ppm) and reacts with water to form hypochlorous acid (HClO or HOCl) and hydrochloric acid (HCl) (Scheme 3 to 5). As a result, the water in the anode chamber is acidified, the dissolved oxygen (DO) and the redox potential (ORP) rise, and the effective chlorine concentration reaches 20 to 10,000. Reaction patterns in the anode chamber of the electrolytic cell as described above are shown in the following reaction formulas, respectively.

[Reaction Scheme 1]

Scheme 2

Scheme 3

[Reaction Scheme 4]

Scheme 5

In addition, in the cathode inside the cathode chamber, water (H ₂ O) is reduced to generate hydrogen (H ₂ ) and hydroxyl ions (OH ⁻ ) (Scheme 6), and the generated hydrogen reacts with dissolved oxygen to produce DO (dissolved oxygen) and ORP (redox potential) is reduced. Therefore, the strong alkaline electrolytic water which shows high alkaline (pH11-13) produces | generates in the negative electrode in a negative electrode chamber. The reaction at the negative electrode is shown in Scheme 6 below.

[Reaction Scheme 6]

As a result, in the anode chamber of the electrolytic cell, acidic water containing chlorine and chlorine compounds is obtained, and alkaline water is obtained in the cathode chamber.

In the case where there is no septum between the anode and the cathode, the reaction products of the anode and the cathode are mixed. However, in general, since the electrolysis efficiency at water reduction at the cathode is superior to the water oxidation electrolysis efficiency at the anode, the electrolytic decomposition product exhibits weak alkalinity (pH 8-9). Electrolyzed water obtained by electrolysis in such a membrane-free state is regarded as a solution diluted with sodium hypochlorite, and is also called electrolytic tea water.

However, when using the electrolysis apparatus as shown in FIG. 1, there are the following problems. That is, acid water and alkaline water are inevitably generated simultaneously during the electrolysis of water. Since alkaline water and acidic water are always produced at the same time, there is a problem that generated water of one side is generated as wastewater unless alkaline water and acidic water are desired at the same time. In other words, when only acidic water is required, alkaline water generated at the same time becomes wastewater, and when only alkaline water is needed, acidic water generated at the same time becomes wastewater.

In addition, when using the electrolysis apparatus as shown in Figure 1 there are other problems as follows. That is, about 10 to 100 ppm of Ca ²⁺ or Mg ²⁺ dissolved in nature is present in water. Here, the cationic components Ca ²⁺ and Mg ²⁺ are attracted to the electric field and move to the cathode. As a result, the pH at the surface of the cathode is raised to pH 12 or higher by OH ⁻ generated by Scheme 6. In addition, Ca ²⁺ or Mg ²⁺ migrated to the surface of the cathode reacts with OH ⁻ generated in the electrode reaction (Scheme 7 and Scheme 8), and on the surface of the cathode, magnesium hydroxide (Mg (OH) ₂ ) and calcium hydroxide (Ca (OH) ₂ ) precipitates are produced. The calcium and magnesium attached to the surface of the cathode interferes with the movement of current and decreases the efficiency of electrolysis, causing problems in efficiently producing acidic and alkaline water. Scheme 7 and Scheme 8 are as follows.

[Reaction Scheme 7]

[Reaction Scheme 8]

As described above, the variable affecting the formation of Ca (OH) ₂ and Mg (OH) ₂ on the surface of the electrode is pH, and their correlations can be obtained from the solubility Ksp, and the formula is shown in Equation 1 below.

[Equation 1]

The Ksp of calcium hydroxide Ca (OH) ₂ is 9 × 10 ⁻⁷ and the Ksp of magnesium hydroxide Mg (OH) ₂ is 4 × 10 ⁻¹² (Y. Ogata et al., J. Electrochem. Soc., 136, 91, (1989)). . From these results, it can be seen that 50 ppm of Ca and 50 ppm of Mg form precipitates at about pH 11-12 or higher. Therefore, it is preferable to effectively remove calcium and magnesium adhered to the electrode. In general, a method of removing calcium and magnesium adhered to the electrode is a method of supplying a reverse current to the electrode, a method of cleaning using an acidic solution, or the like. Is generalized.

On the other hand, the conventional ionized water generator has the following problems as mentioned above, it is difficult to apply to the car wash using a large amount of water.

First, since the conventional ionized water generator generates acidic water and alkaline water in the anode chamber and the cathode chamber at the same time, when only acidic water is needed, the alkaline water generated at the same time becomes unnecessary water, resulting in waste of water and disposal. Discomfort will follow, when only alkaline water is required, acidic water generated at the same time becomes unnecessary water, resulting in waste of water and inconvenience in treatment.

Second, in the case of the car wash, a large amount of water is required. Therefore, in generating the ionized water by electrolyzing a large amount of water using a conventional ionized water generator, Ca and Mg present in the water are inevitably accumulated in the cathode and the current There is a problem that the efficiency is rapidly reduced so that the pH of the alkaline water is lowered. On the other hand, as a method of removing calcium and magnesium attached to a common electrode, there is a method of supplying a reverse current to the electrode, a method of cleaning using an acidic solution, etc., but there are many difficulties in the handling thereof.

Therefore, in order to use the ionized water generator in the car wash, electrolyzed a large amount of water to generate ionized water, but only alkaline water, which is a single component, is continuously generated, and the generated acidic water is used to remove the scale formed on the cathode and used for washing. It must be configured to have a structure and system for recycling the waste water which is the deionized water. However, due to the problems described above, there has never been developed a stable and efficient car wash ion water production apparatus, and none of these attempts have been put to practical use.

Therefore, the present invention has been made to solve the problems of the prior art as described above, by supplying the acidic water produced by electrolysis of water to the cathode chamber to effectively remove the calcium and magnesium components formed on the cathode and to wash the alkaline water It is an object of the present invention to provide a car wash device using alkaline water to supply the car washing means to effectively wash the vehicle.

In addition, the present invention has another object to provide a car wash water treatment system for reusing the alkaline water used in the car wash.

In order to achieve the above object, a car washing device using the alkaline water of the present invention, an ionized water generator for generating an alkaline water and an acidic water by electrolysis of water, alkaline water supply means for supplying the alkaline water generated in the ionized water generator to the car washing means, and It includes a car wash means for washing with alkaline water supplied from the alkaline water supply means.

The ionized water generator of the present invention includes an electrolysis cell, a DC power supply for supplying current to an electrode in the electrolytic cell, an anolyte reservoir for storing an anolyte from an external time water, and an external time water supply. A catholyte reservoir for receiving and storing anolyte, first and second flow means for flowing to supply or discharge the anolyte or catholyte in the anolyte reservoir, and anolyte or catholyte And a plurality of flow lines for selectively flowing the acidic or alkaline water generated in the electrolytic cell.

In addition, the electrolysis cell of the present invention includes a positive electrode chamber having a positive electrode, a negative electrode chamber having a negative electrode, and a cation exchange membrane capable of moving the cation component in the positive electrode chamber to the negative electrode chamber while distinguishing the positive electrode chamber and the negative electrode chamber, Acidic water in the anode chamber is supplied to the cathode chamber via the catholyte storage tank to be used to remove the scale formed in the cathode, and an alkaline water discharge line for discharging the alkaline water in the cathode chamber toward the alkaline water supply means.

The present invention may further include an alkaline water storage tank installed between the alkaline water discharge line and the alkaline water supply means to store the alkaline water discharged along the alkaline water discharge line.

The car wash water treatment system of the present invention includes an ionized water generator for generating alkaline and acidic water by electrolyzing water, an alkaline water storage tank for storing alkaline water generated and discharged from the ionized water generator, and an alkaline water stored in the alkaline water storage tank. Alkaline water supply means for supplying the car washing means for supplying, storage water for storing the wastewater generated after washing with alkaline water supplied through the alkaline water supply means, wastewater flow means for flowing the wastewater stored in the storage feet, and included in the wastewater Oil-water separation means for removing the oil components, and filtration means for removing the solid components contained in the waste water and circulating back to the alkaline water storage tank.

This invention can supply the alkaline water generated by electrolysis of water to the car washing means of the car wash to wash the vehicle, there is an advantage that can remove the environmental burden caused by the use of the existing surfactant.

In addition, the present invention is configured to continuously generate and use a single-phase alkaline water, there is an effect of reducing the amount of water used by more than 1/2 compared to the method of generating a continuous alkaline and acidic water at the same time.

In addition, the present invention can effectively remove the scale of the calcium and magnesium formed on the cathode in the cathode chamber by using acidic water generated during the electrolysis of water, thereby reducing the manufacturing cost of the device compared to the effect It is effective.

In addition, the present invention is configured to reuse the alkaline water used in the car wash, thereby reducing the amount of water used for car wash.

1 is a principle diagram of an ionized water generator (electrolysis device) for producing acidic and alkaline water by electrolyzing water to which an electrolyte (eg, NaCl) is added.
Figure 2 is a schematic diagram showing the configuration of the car wash ion water generator according to an embodiment of the present invention,
FIG. 3 is a conceptual diagram of a car wash water treatment system for washing and using the alkaline water generated in the ionized water generator for a car wash shown in FIG.

In the following, with reference to the accompanying drawings, a preferred embodiment of a car wash apparatus using an alkaline water and a car wash water treatment system having the same according to the present invention will be described in detail. However, the configuration of the present invention should not be construed as being limited to the contents described below.

2 is a schematic diagram showing the configuration of the car wash ion generator 200 according to an embodiment of the present invention.

Structure and Materials of Ion Water Generator 200

As shown in FIG. 2, the ionized water generator 200 of this embodiment includes an electrolysis cell 210, a DC power supply 220 for supplying current to an electrode in the electrolysis cell 210, and an external device. Anolyte storage tank 230 for storing the anolyte by receiving the water of time, Catholyte storage tank 240 for storing the catholyte by receiving external time water, Anolyte or catholyte storage tank in the anolyte storage tank 230 The first and second flow means 250 and 260 which flow to supply or discharge the catholyte in 240 and the acidic or alkaline water generated in the electrolytic cell 210 while flowing the anolyte or catholyte It is configured to have a plurality of flow lines (circulation line, supply line, discharge line) for flowing.

The electrolysis cell 210 divides the positive electrode chamber 212 with the positive electrode 211, the negative electrode chamber 214 with the negative electrode 213, and the positive electrode chamber 212 and the negative electrode chamber 214. The cation component in 212 is composed of a cation exchange membrane 215 that is movable to the cathode chamber 214.

The anolyte chamber 212 is connected to the anolyte reservoir 230 via the first flow means 250 to receive the anolyte in the anolyte reservoir 230 and the anode chamber 212. Acidic water circulation line (S272) for circulating by discharging the acidic water generated in the anolyte storage tank 230 is installed. On the other hand, the cathode chamber 214 is connected to the catholyte storage tank 240 through the second flow means 260 to receive a catholyte solution in the catholyte storage tank 240, and a cathode chamber ( Alkaline water circulation line (S274) for discharging the alkaline water generated in 214 to the catholyte reservoir 240 is circulated.

The anolyte storage tank 230 is a water supply line (S275) receiving tap water (which may include an electrolyte) and acid water receiving acid water generated and discharged from the anode chamber 212 of the electrolysis cell 210. The circulation line S272 is installed. In addition, the anolyte storage tank 230 is connected to the anode chamber 212 via a gas discharge line S276 for discharging the gas generated from the anode 211 and the first flow means 250 to discharge the anolyte solution. The liquid discharge line S277 is installed. On the other hand, the anolyte discharge line (S277) and the anolyte supply line (S271) for supplying the anolyte in the anolyte reservoir 230 through the first flow means 250 to the anode chamber 212, and the anolyte separately Acid water discharge line (S278) for discharging the purpose of use of, and the catholyte storage tank for supplying the anolyte in the anolyte storage tank 230 to the cathode chamber 214 to remove the scale generated in the cathode chamber 214 Acidic water supply line (S279) is connected to the 240 is installed.

The catholyte storage tank 240 is a water supply line (S281) receiving tap water (which may include an electrolyte) and an alkaline water circulation line receiving alkaline water generated and discharged from the cathode chamber 214 of the electrolysis cell 210. (S274) and the acidic water supply line (S279) receiving the anolyte to supply the anolyte of the anolyte reservoir 230 to the cathode chamber 214 to remove the scale generated in the cathode chamber 214. This is installed. In addition, the cathode liquid storage tank 240 is connected to the cathode chamber 214 via a gas discharge line S282 for discharging the gas generated from the cathode 213 and the second flow means 250 to discharge the cathode liquid. The liquid discharge line S283 is installed. The cathode liquid discharge line S283 is connected to a cathode liquid supply line S273 for supplying the cathode liquid in the cathode liquid reservoir 240 to the cathode chamber 214 through the second flow means 260, An alkaline water discharge line S284 is provided for discharging the water for use.

The positive electrode 211 and the negative electrode 213 in the electrolysis cell 210 are suitably a mesh, a mesh, or the like, through which liquid and gas can pass, and a flat electrode may be used. Here, suitable materials for the positive electrode 211 and the negative electrode 213 include titanium, tantalum, nickel, and the like, and the platinum group is coated by a method such as pyrolysis or electroplating to give an electrode catalyst function. It is preferable.

The anode 211 in the anode chamber 212 is preferably an alloy composed of one or more metals selected from the group consisting of platinum group metals (platinum, ruthenium, rhodium, palladium, osmium, iridium) and tin. On the other hand, the cathode 213 in the cathode chamber 214 is a catalyst for generating hydrogen, platinum metal (platinum, ruthenium, rhodium, palladium, osmium, iridium), gold, silver, chromium, iron, titanium, manganese, cobalt , Alloys composed of one or more metals selected from the group consisting of nickel, molybdenum, tungsten, aluminum, silicon, zinc and tin are preferred.

The cation exchange membrane 215 is a solid polymer electrolyte, and preferably has a thickness of 50 to 900 µm. The reason is that if the thickness is too thin (50 mu m or less), there is a risk of mechanical and chemical damage. If the thickness is thick (900 mu m or more), the resistance increases and the voltage rises rapidly. More preferably, they are 50 micrometers-200 micrometers.

In addition, the cation exchange membrane 215 must not be moved while the anions, while cations, ie, hydrogen ions, must be movable, and must be durable in heat resistance to temperature and an electrochemical redox atmosphere. do. Accordingly, the cation exchange membrane 215 transfers ions to selectively move cations to a hydrocarbon-based or fluorocarbon-based polymer so as to satisfy the above functions and requirements. It is preferable to construct a polymer structure having sulfonic, carboxylic and phosphoric acidic groups. More preferably, the polymer has a film structure having a strong acidity group of ˜SO 3 in a hydrocarbon-based or fluorocarbon-based polymer having excellent heat resistance and oxidation resistance. Representative cation exchange membrane 215 of this series is the "trade name NAFION" of DuPont (E. I. du Pont de Nemours and Company, Wilmington, Del.).

The electrolysis cell 210 may be an acrylic resin, acetal resin, polyvinylchloride resin (PVC), chlorinated PVC resin (CPVC), polyvinylidene difluoride (PVDF) resin, Teflon (or PTFE, polytetrafluoroethylene) resin, fluoropolymer resin, or ABS. (acrylonitrile-butadiene-styrene) It can be produced by molding from a polymer material such as resin, or can be made from a metal material with corrosion resistance such as titanium.

The DC power supply unit 220 is a DC current supply to supply the electrolysis cell 210, it is also possible to use a secondary battery or a power conversion device that can supply DC power from the AC power.

How to descale

When electrolytes (eg, NaCl, KCl, Na ₂ CO ₃ , K ₂ CO ₃ ) are included in the time water supply line S275 and supplied to the anode chamber 212 through the anolyte storage tank 230, these electrolytes The anion component of (eg, Cl ⁻ , CO ₃ ^2- ), etc. reacts at the anode 211 to produce chlorine or CO ₂ gas (products generated during electrolysis of Na ₂ CO ₃ , K ₂ CO ₃ ) and water. The decomposed oxygen gas is produced (Scheme 1 and Scheme 2). H ⁺ is present in a large amount in the anode chamber 212 by the decomposition reaction of water, and the anode chamber 212 is acidified, and is lowered to about pH 2 or less by controlling the current supply amount.

By the way, the pH which can be used for the scale removal attached to the surface of a negative electrode is possible at 4 or less. Accordingly, as mentioned above, the anode liquid having a pH of 4 or less in the anode chamber 212 is supplied to the cathode chamber 214 through the catholyte storage tank 240 through the acidic water supply line S279 to the cathode chamber 213. The scale attached to the surface can be removed.

The following describes the operation method of the car wash ion water generator of this embodiment configured as described above.

Driving method to generate only alkaline water

During normal operation

An operation method of generating only alkaline water using the car wash ion water generator shown in FIG. 2 is as follows.

The electrolyte MX is added to the water. In the electrolyte expression MX X is chloride (Cl ^-), carbonate ions (CO ₃ ^2-), bicarbonate ion (HCO ₃ ^-) of which is a component of, M is sodium ion (Na ^+), potassium ion in the alkali metal ( K ⁺ ) component. Therefore, the electrolyte MX can be used as an inorganic material to which the above components are selectively combined.

Initially, water with an electrolyte is supplied to the anolyte storage tank 230, and electrolysis is performed while continuously supplying the stored water to the anode chamber 212 using the first flow means 250. In addition, water is supplied to the catholyte reservoir 240, and electrolysis is performed while the stored water is continuously supplied to the cathode chamber 214 using the second flow means 260. Then, when the pH of the catholyte reservoir 240 reaches a predetermined condition, the valve V281 of the time water supply line S281 and the valve V284 of the alkaline water discharge line S284 are opened to operate continuously. Therefore, the alkali water generated through the alkaline water discharge line S284 is continuously discharged. On the other hand, the valve (V278) provided in the acidic water discharge line (S278) is closed, and continues to circulate without discharging the acidic solution of the anode chamber (212).

Table 1 below shows the state of the valve in normal operation to generate only alkaline water.

V271 V278 V279 V275 V273 V284 V281 On Off Off Off On On On

Non-operational

When not in operation, descaling attached to the surface of the cathode 213 is performed. First, all the solutions in the catholyte reservoir 240 are discharged using the second flow means 260. That is, the valve V284 is opened and discharged through the alkaline water discharge line S284. Although not shown in FIG. 2, the electrolysis cell 210 may be directly discharged to the outside.

Thereafter, water having a pH of 4 or less stored in the anolyte reservoir 230 is supplied to the catholyte reservoir 240 through the acidic water supply line S279 using the first flow unit 250. Here, the water may be supplied to the catholyte storage tank 240 by opening the valve V279 provided in the acidic water supply line S279. Then, the acidic water stored in the catholyte reservoir 240 is supplied to the cathode chamber 214 using the second flow means 260 to remove the scale attached to the surface of the cathode 213.

Table 2 below shows the state of the valve in cleaning the cathode chamber 214 using acidic water after discharging the alkaline water stored in the cathode chamber 214 during non-operation.

V271 V278 V279 V275 V273 V284 V281 Off Off On Off On Off Off

The removal cycle of the scale through the above method is preferably one or more times a day.

Hereinafter, a description will be given of a car wash apparatus using a car wash ion water generator configured as described above and a water treatment system in a car wash.

FIG. 3 is a conceptual diagram of a car wash water treatment system for washing and using the alkaline water generated in the ionized water generator for a car wash shown in FIG.

As shown in FIG. 3, the water treatment system 300 of this embodiment is generated in the ionized water generator 200 and the ionized water generator 200 configured as shown in FIG. 2 along the alkaline water discharge line V284. Alkaline water storage tank 310 for storing the flow of alkaline water, alkaline water supply means 330 for supplying the alkali water stored in the alkaline water storage tank 310 to the car washing means 320, and the alkaline water supplied through the alkaline water supply means 330 A storage pit 340 for storing the wastewater generated after washing the vehicle, a wastewater flow means 350 for flowing the wastewater stored in the storage pit 340, and oil-water separation means 360 for removing oil components contained in the wastewater. ), And filtration means 370 for circulating back to the alkaline water storage tank 310 after removing the solid components contained in the waste water.

The storage pit 340 homogenizes the wastewater and separates the sediments contained in the wastewater from the wastewater. That is, the storage pit 340 uniformly adjusts the load of the inflowing wastewater, removes soil, dirt, and the like contained in the car wash wastewater, and serves to remove oil components. Here, the earth and sand in the pre-wash wastewater is settled to the bottom and the oil component and the like rises to the water surface because the specific gravity is smaller than the water. Therefore, in the storage pit 340, the sedimentation and oil components are separated from the waste water. Meanwhile, the wastewater stabilized in the storage pit 340 is introduced into the oil / water separation means 360 through the wastewater flow means 350.

The oil-water separation means 360 is a separation method using specific gravity, but an oil-water separation method of the electrolytic flotation method is preferable. Electrolytic flotation is a method of removing the fine particles and oil components in the wastewater by using the fine bubbles of hydrogen and oxygen gas generated when the wastewater is electrolyzed. When the electrolytic flotation method is used, fine particles such as an oil component which is not removed from the storage pit 340 and a wax component which is suspended and present in a colloidal state are removed. The upper portion of the oil-water separation means 360 is preferably configured to further include a conventional skimmer, which is a device for removing the floating oil.

The wastewater that has passed through the oil and water separation means 360 is supplied to the alkaline water storage tank 310 through the filtration means 370, and the final treated water stored in the alkaline water storage tank 310 may be directly reused for washing.

The filtering means 370 may use a known filter such as a sand filter or a micro filter, and the membrane itself has a high strength, so that damage to the membrane surface due to contact with contaminants mixed from the waste water is small, long life, and the reverse direction of the filtration direction. The hollow fiber membrane which can blow back a medium and removes the deposit on the membrane surface is preferable.

In the above description, the technical details of the car wash apparatus using the alkaline water of the present invention and the water treatment system for car washes having the same have been described together with the accompanying drawings, which are illustrative examples of the best embodiments of the present invention and are not intended to limit the present invention. .

In addition, it is obvious that any person skilled in the art can make various modifications and imitations within the scope of the appended claims without departing from the scope of the technical idea of the present invention.

200: ionized water generator 210: electrolysis cell
220: DC power supply 230: anolyte storage tank
240: catholyte reservoir 250: first flow means
260: second flow means 300: water treatment system
310: alkaline water storage tank 320: car wash means
330: alkali water supply means 340: storage feet
350: wastewater flow means 360: oil water separation means
370: filtering means

Claims (11)

As a car wash device for washing with alkaline water produced by electrolysis of water,
Ionized water generator for electrolyzing water to generate alkaline water and acidic water, alkaline water supply means for supplying the alkaline water generated in the ionized water generator to the car washing means, and the car wash using the alkaline water supplied from the alkaline water supply means Means,
The ion water generator includes an electrolysis cell, a DC power supply for supplying current to an electrode in the electrolytic cell, an anolyte storage tank for receiving an external time water and storing an anolyte solution, and an external time water supply. A catholyte reservoir for storing catholyte, first and second flow means for flowing to supply or discharge the anolyte in the anolyte reservoir or catholyte in the catholyte reservoir, and the anolyte or the cathode And a plurality of flow lines for selectively flowing the liquid and for selectively flowing the acidic or alkaline water generated in the electrolytic cell,
The electrolysis cell includes a positive electrode chamber having a positive electrode, a negative electrode chamber having a negative electrode, and a cation exchange membrane capable of moving a cation component in the positive electrode chamber to the negative electrode chamber while separating the positive and negative electrode chambers.
The plurality of flow lines include an acidic water supply line for supplying acidic water in the anode chamber to the cathode chamber via the catholyte storage tank to remove scale formed in the cathode, and an alkali water supply means for supplying alkaline water in the cathode chamber. Car wash apparatus using an alkaline water, characterized in that it comprises an alkaline water discharge line for discharging toward. The method according to claim 1,
And an alkaline water storage tank installed between the alkaline water discharge line and the alkaline water supply means to store the alkaline water discharged along the alkaline water discharge line. The method according to claim 1,
And said plurality of flow lines comprises an acidic water circulation line for circulating said acidic water in said anode chamber to said anolyte storage tank and circulating it back to said anode chamber. The method according to claim 1,
The anode and the cathode is a car wash device using an alkaline water, characterized in that the liquid and gas permeable has a mesh or mesh form. The method of claim 4,
The anode is a car wash device using an alkaline water, characterized in that the alloy consisting of one or more metals selected from the group consisting of platinum, ruthenium, rhodium, palladium, osmium, iridium, tin. The method of claim 4,
The cathode is selected from the group consisting of platinum, ruthenium, rhodium, palladium, osmium, iridium, gold, silver, chromium, iron, titanium, manganese, cobalt, nickel, molybdenum, tungsten, aluminum, silicon, zinc and tin. Car wash apparatus using an alkali water, characterized in that the alloy consisting of one or more than one metal. The method according to claim 1,
The cation exchange membrane is a solid polymer electrolyte, the washing machine using alkaline water, characterized in that the thickness of 50 ~ 900㎛. The method of claim 7,
The cation exchange membrane is an ion transfer group sulfonic, carboxylic and phosphoric (cation) to selectively move cations to a hydrocarbon-based or fluorocarbon-based polymer. Car wash apparatus using an alkaline water, characterized in that consisting of a polymer structure having phosphoric acid-based groups (acidic groups). The method of claim 7,
The cation exchange membrane is a car wash apparatus using an alkaline water, characterized in that having a membrane structure having a strong acidity group of ~ SO3 type in a hydrocarbon-based material or a fluorocarbon-based polymer. As a car wash water treatment system for washing with alkaline water generated by electrolysis of water, to reuse the alkaline water used for washing,
An ionized water generator for generating alkaline water and acidic water by electrolyzing water, an alkaline water storage tank for storing alkali water generated and discharged from the ionized water generator, and an alkaline water supplying alkaline water stored in the alkaline water storage tank as a car washing means for washing the car A storage pit for storing waste water generated after washing by using an alkaline water supplied through the alkaline water supply means, a waste water flow means for flowing the waste water stored in the storage pit, and oil components contained in the waste water Car wash water treatment system comprising an oil-water separation means, and filtration means for removing the solid components contained in the waste water and circulating back to the alkaline water storage tank. The method of claim 10,
The ion water generator is a water treatment system for a car wash, characterized in that the ion water generator according to any one of claims 1 to 9.

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