KR101184174B1 - Air floatation type algae removing apparatus - Google Patents

Abstract

PURPOSE: An air floating type algae removing apparatus is provided to increase the floc removing efficiency of the apparatus by generating plenty of micro air bubbles. CONSTITUTION: An air floating type algae removing apparatus includes a floatation bath(10), an aerator(20), a floc forming bath(30), an introducing pipe(70), a chemical injecting pipe(75), an ultrasonic wave generator(50), a scraper(60), a treated water bath(80), and an electrolytic cell(100). The floc forming bath is installed at the middle of the floating bath. The aerator is positioned in the floc forming bath. The introducing pipe introduces raw water into the floc forming bath. The chemical injecting pipe is in connection with the introducing pipe and injects coagulant. The ultrasonic wave generator is installed at the lower side of the introducing pipe. The treated water bath is arranged at one side of the floating bath and stores treated water without algae. The electrolytic cell includes a plurality of copper electrodes and applies copper ions to the treated water.

Description

Air floatation type algae removing apparatus

The present invention relates to an algae removal apparatus using an air flotation method, and more particularly, algae contained in raw water drawn up from a water system such as a river or a river or a lake are removed using fine air bubbles, and then copper ions are added to the treated water. To remove the algae contained in the raw water by discharging it back into the water system and to prevent algae proliferation in the water system by using copper ions contained in the treated water discharged into the water system. It is about.

In general, eutrophication occurs when an excessive amount of nutrients such as organic matter, nitrogen, and phosphorus are supplied to natural water systems such as reservoirs, lakes, and rivers and artificial water systems such as golf course reservoirs. In eutrophicated waters, red or green algae occur in which phytoplankton or algae multiply in large amounts to red or yellow-green.

Red tide or green algae not only degrades the color of the water system, but also degrades the surrounding landscape, and depletes the oxygen inside the water, resulting in the death of aquatic organisms, and debris from the extinction of propagated algae. Because of the deposition and decay, the water quality is deteriorated by the generation of toxic substances and odors.

In order to remove the red tide and the green algae phenomenon, the loess is sprayed in the water to remove the nutrients and algae in the water by using the adsorption and cohesive force of the loess, and the nutrients by adding the flocculant into the water. And a flocculant input method that aggregates and removes algae grown, uses aquatic plants to absorb and remove nutrients through the roots of aquatic plants by planting aquatic plants, and injects air into the water by means of pressurized air, Air flotation to remove salts and algae by flotation, sterilization of microorganisms using ozone, flotation separation using bubbles generated during electrolysis, and removal using chlorine generated by electrolysis of seawater Etc.

The present invention relates to a flotation separation method that floats nutrients and algae to the surface using air bubbles in water. Flotation method is mechanical flotation method, pressurized flotation method, electrolytic flotation method depending on the method of injecting air into the water. Microbiological floating method. The mechanical flotation method is a method of crushing air into a small size by using a mechanical stirring facility and using it in the flotation process. The pressure flotation method is a wound that pressurizes return water to saturate air and exposes it to atmospheric pressure to form fine air bubbles. This is the method used for separation. In the pressure flotation method, the air is saturated by saturating the air at atmospheric pressure and placed in a pressure-reduced airtight tank, and then the air solubility is reduced by forming a bubble by reducing the solubility of the air. Dissolved air flotation method. Electrolytic flotation is a method of using bubbles made of minute hydrogen or oxygen bubbles generated by electrolysis of water, and microbiological flotation generates bubbles such as nitrogen and carbon dioxide by a biological nitriding / denitrification system, or algae grows vigorously. When oxygen in a supersaturated state is generated by photosynthesis, bubbles generated by oxygen generate a bubble.

Conventional algae removal device using the air flotation method to produce flocs (Floc) by adding a flocculant to the raw water, by attaching a micro-bubble to the floc to rise above the surface of the water and then remove by the scum remover (Skimmer), A reaction tank for injecting flocculant into the raw water containing algae, a flotation separator for floating the floc formed by the flocculant, a scum removal unit for removing contaminants from the surface of the flotation tank, and bubbles into the flotation separator And a bubble generator for injecting bubbles, an air compressor for injecting air into the bubble generator, and an air regulator for maintaining a constant pressure of air generated in the air compressor.

The flotation separation tank is attached to the microbubbles (bubble) to reduce the density of the suspended solids, and to increase the buoyancy, so as to induce the flotation of the suspended solids to collect and remove, dissolved in accordance with the method of making a micro air bubble It may be classified into air flotation, induction air flotation, air flotation, vacuum flotation. Dissolved Air Flotation (DAF) is divided into water pressurization and partial pressurization. The water pressurization pressurizes the entire wastewater and floats it. As a method of flotation, both treatment principles have the principle of injecting external air using an air compressor or ejector to inject sludge by making pressurized water. Air flatation is a method using a blower and an diffuser, and is a method of forcibly injecting air into waste water to simultaneously float fine air and particulate matter. The vacuum flotation is a method of injecting waste water into a space in a vacuum state, causing supersaturated air bubbles to elute to the particulate matter and to float the particulate matter.

The floating separation tank of the present invention relates to an induction air flotation method for generating microbubbles by installing an aerator in water. CAF (Cabvltation Air Flotation) creates a cavitation area under atmospheric pressure by the high-speed rotational force of the aerator and makes the pressurized water by making the bubble finer by the action of the impeller. Treatment is to increase the flotation effect. Induction air flotation eliminates the need for recirculation pumps, air compressors, pressurized (pressure) vessels and high pressure pumps, eliminates the need for pre-stirring flocs, and eliminates the need for flash mixers and air control valves. have. In addition, it is easy to repair and repair the drive parts, and there is an advantage that the nozzle can be installed in a small area while cleaning nozzles and underground pipes are unnecessary.

However, the conventional induction air flotation method has a problem that a large amount of algae remains in the treated water because the efficiency of the algae removal is reduced instead of the simple structure of the device. These algae enter the water system and cause algae. Therefore, a method for improving algae removal efficiency and removing algae remaining in treated water is required.

Accordingly, in recent years, technologies for carrying out a sterilization method using ultraviolet rays, ozone, or chlorine at the rear of the algae removal device have been developed. For example, after removing algae using a flocculation-floating solid-liquid separation method, chlorine is added to the treated water to kill algae remaining in the treated water. However, conventional ultraviolet rays, ozone, chlorine, etc. can kill algae quickly, but it is toxic and may adversely affect other aquatic plants, and because the remaining time in the water is short, the effect of suppressing the occurrence of algae in the water system is inferior. have.

The present invention is to solve the problems of the prior art, the main object of the present invention is to simplify the configuration of the device by applying an induced air flotation method while generating a large amount of fine air bubbles to increase the floc removal efficiency air To provide a floating bird removal device.

In addition, the present invention is to provide an air flotation algae removal device to remove the algae contained in the treated water discharged from the algae removal device and to suppress the algae generated in the water system by using the treated water discharged to the water system.

As a means for solving the above problems, the air flotation algae removal apparatus according to the present invention,

In the air-floating algae removal device comprising a flotation tank for floating algae, and a scraper for removing contaminants injured in the water,

A floc forming tank installed in the center of the flotation separation tank;

An aerator installed to be located inside the floc forming tank;

An inlet pipe installed to supply raw water including algae to the inside of the floc forming tank;

A chemical inlet tube connected to the inlet tube and injecting a flocculant;

An ultrasonic generator installed under the inlet pipe;

A treatment water tank provided at one side of the floating separation tank and storing treated water from which algae is removed by the scraper;

Configured to include a plurality of copper electrodes installed to contain copper ions in the treated water supplied from the treated water tank,

The raw water supplied from the inlet pipe and the air bubble supplied from the aerator are ejected into the region of the ultrasonic wave radiated from the ultrasonic generator to kill algae and generate a large amount of micro bubbles, thereby facilitating the flotation of the electrolytic cell. The treated water passing through is characterized by containing copper ions to prevent algae from proliferating in the water system after being discharged into the water system.

According to the air-floating algae removal device of the present invention, the micro-bubbles generated by the microbubble generated by the aerator and the cavitation effect of the ultrasonic wave emitted from the ultrasonic generator and the microbubbles generated by the air bubble destruction effect of the ultrasonic wave By making a large amount of micro-bubbles due to the floe is easy to rise and there is an effect that the structure of the float separation tank is simplified.

In addition, the present invention is to supply the treated water discharged to remove the algae from the flotation tank to the electrolytic bath electrolytic treatment to ensure that the treated water contains an appropriate amount of copper ions having the effect of killing and inhibiting algae discharged to the water system The water has an effect of suppressing the generation of algae in the water system.

1 is a schematic configuration diagram showing an algae removing device according to the present invention,
2 is a side view showing an example of an aerator according to the present invention;
3 is a perspective view showing an example of an impeller casing according to the present invention;
4 is an exploded perspective view showing the structure of an electrolytic cell according to the present invention;
5 is an exploded perspective view showing a structure of a reaction unit shown in FIG. 4;
5 is a plan view of FIG.
Figure 6 is an old view showing another embodiment of the algae removal apparatus according to the present invention.

Hereinafter, with reference to the accompanying drawings will be described in detail with respect to the algae removal apparatus according to the present invention.

The algae removal device 1 according to the present invention is composed of a floating separation tank 10, an aerator 20, a floc forming tank 30, a scraper 60 and an electrolytic cell 100.

The floating separation tank 10 is a reaction tank for removing the algae contained in the raw water by floating on the surface of the water.

The aerator 20 is for supplying bubbles to the raw water to be processed in the floating separation tank (10). The aerator 20 includes an impeller 21 rotating at a high speed.

The floc forming tank 30 is used to agglomerate contaminants into a size suitable for floating separation of contaminants in raw water by bubbles supplied from the aeration 20. The flocculation tank 30 has a size of 20 to 80 mm. to be.

The electrolytic cell 100 is a reaction tank for containing copper ions in the treated water discharged from the floating separation tank (10).

The present invention removes the algae contained in the raw water drawn from the water system such as rivers, reservoirs, lakes, etc. and then discharges the treated water back to the water system, containing copper ions in the treated water discharged to the water system to thrive the algae in the water system It is to suppress. Therefore, the present invention is superior to the algae removal effect compared to the conventional algae removal device that only removes algae contained in raw water.

To this end, the algae removal device 1 of the present invention is a suction pump (3) for sucking the appeal water of natural water systems such as reservoirs, lakes, rivers, and artificial water systems such as golf course reservoirs, and discharged from the algae removal device (10) A treatment tank 80 for temporarily storing the treated water to be included.

More specifically, the flotation separation tank 10 according to the present invention. The scraper 60 is further installed to collect the floating float (aka, scum) on top of the float separation tank that can separate the algae.

And in the center of the flotation separation tank 10 is provided a floc forming tank 30 for forming a floc. The floc forming tank 30 is formed in a cylindrical shape and is provided with a ceiling so as to install the aerator 20 thereon. Openings 31 are provided on the side of the floc forming tank 30 in a size sufficient to allow the floc to escape with the raw water.

The aerator 20 is installed at the center of the floc forming tank 30. The impeller 21 of the aerator 2 is installed to be located at the lower end of the floc forming tank 30.

As shown in FIG. 2, the aerator 20 includes a drive motor 24 for providing a driving force, a rotation shaft 23 connected to the drive motor 24, and an impeller connected to the rotation shaft 23. 21 and an impeller casing 22 surrounding the impeller 21.

The impeller casing 22 is spaced apart from each other to surround and secure a plurality of wedge bars 25 having a triangular cross section arranged vertically at regular intervals and the outer circumferential surface of the wedge bars, as shown in FIG. 3. It consists of a plurality of round annular road bars (26) arranged and a disc (27) attached to block the upper surface of the wedge bar. In the figure, the disk 27 is shown to fall apart, but in fact is closely coupled to the top of the wedge bar 25.

Subsequently, the inflow pipe 70 for supplying raw water containing algae is installed in the floc formation tank 30. The inflow pipe 70 is installed to send raw water containing algae in the direction of the center of the floc forming tank (30). And the inlet pipe 70 is provided with a suction pump (3). In addition, the inlet pipe 70 is connected to the chemical injection pipe 75 for injecting the flocculant. Therefore, the flocculant injected through the chemical injection tube 75 is introduced into the floc forming tank 30 together with the raw water. The raw water and the flocculant supplied to the floc forming tank 30 are stirred by turbulence generated by the rotation of the impeller 21.

The ultrasonic generator 50 is installed below the inlet pipe 70. The ultrasonic generator 50 is installed to be located below the inlet pipe 70, preferably the ultrasonic generator 50 is installed to be irradiated upward toward the discharged raw water. The intensity of the ultrasonic waves emitted to the outside from the floc forming tank 30 is small so that the flocks of the flotation tank 10 are not destroyed.

More preferably, the ultrasonic generator 50 is an ultrasonic vibrator 51 is installed to enable the irradiation of ultrasonic waves toward the raw water discharged from the inlet pipe 70, and the fixing means for fixing the ultrasonic vibrator 51 52 and a controller 53 for outputting a control signal for controlling the operation of the ultrasonic vibrator 51. The ultrasonic vibrator 51 transmits a signal to apply an ultrasonic wave in the oscillation circuit unit, and generates an ultrasonic pulse in which the frequency is irregularly varied in the ultrasonic pulse generator in response to the signal generated in the oscillation circuit unit. Ultrasonic waves are generated by converting the ultrasonic pulse generated from the ultrasonic transducer into ultrasonic waves by vibrating the diaphragm with the converted ultrasonic waves.

The ultrasonic generator 50 is irradiated with ultrasonic waves of frequency 15 ~ 40kHz, output 0.1 ~ 2kHz. One or more ultrasonic vibrators 51 may be installed. And the controller 53 is a control signal for automatically controlling the on / off of the ultrasonic vibrator 51 according to the corresponding time according to the operation time, the operating time zone and the number of times of operation of the ultrasonic vibration vibrator 51 previously input To output

Ultrasonic waves destroy algae by destroying the vacuoles surrounded by a membrane (vacuum membrane) having a high water content and having a thickness of about 7 nm. That is, it breaks the vacuole membrane which is easy to rupture by an ultrasonic vibration. The rupture of the vacuole membrane is affected by the vibration frequency and intensity. The higher the intensity, the easier the rupture of the vacuole membrane is, but the minimum strength that can rupture the vacuole membrane varies depending on the frequency. In addition, when the strength is low, the rupture of the vacuole film takes a lot of time, and when the strength is high, the time of tear is shortened.

Therefore, two or more ultrasonic vibrators 51 may be provided in order to increase the output intensity. At this time, the ultrasonic waves radiated from the two ultrasonic vibrators 51 do not interfere with each other. In addition, the ultrasonic vibrator 51 can be swept in a predetermined range (for example, 45 kHz to 50 kHz). That is, there is a variation in the resonant frequency when the ultrasonic vibrator is manufactured, and the resonant frequency changes according to the use temperature and the capacitance of the connection cable. If the frequency is swept in the resonant frequency deviation range, there is a period in which the ultrasonic output intensity is maximized in one sweep, so that the vesicle membrane rupture of the plant cell is possible at this time. In addition, the ultrasonic vibrator 51 allows to adjust the frequency according to the density of the algae after measuring the density of algae contained in the raw water. To this end, the ultrasonic generator 50 may be further provided with an ultrasonic receiving sensor for receiving the reflected sound signal strength reflected from the raw water.

On the other hand, the ultrasonic wave emitted from the ultrasonic generator 50 not only destroys the alveoli in the algae, but also kills the algae, causing cavitation in the water to generate microbubbles. That is, the ultrasonic generator 50 generates a large amount of micro bubbles by irradiating the bubbles generated by the aerator 20 with ultrasonic waves to destroy the bubbles. To this end, the ultrasonic generator 50 is installed to radiate ultrasonic waves to the bubbles ejected from the aerator 20. The conventional aerator 20 has no choice but to generate only micro bubbles having a size of 20 μm to 80 μm, but can generate a large amount of micro bubbles of 20 μm or less using ultrasonic waves.

In addition, the ultrasonic generator 50 has a cleaning effect of separating and removing contaminants attached to the aerator 20. Therefore, the raw water flowing through the inlet pipe 70 is supplied into the area to which the ultrasonic wave of the ultrasonic vibrator 51 is irradiated, and the bubbles generated by the high speed rotation of the impeller 21 are also the ultrasonic vibrator 51. Ultrasound is supplied to the area to be irradiated.

Then, the algae contained in the raw water supplied from the inlet pipe 70 is killed by the ultrasonic wave radiated from the ultrasonic generator 50, and the algae and the flocculant killed by the rotation of the impeller 21 are agitated at the same time. The air bubbles generated by the high speed rotation of the impeller 21 and the microbubbles generated by the cavitation effect of the ultrasonic waves come into contact with the algae to form flocs.

The flocs having various sizes are attached to a large amount of micro bubbles and floated upward to enter the flotation separation tank 10, and are removed by the scraper 60 installed on the top of the flotation separation tank 10. And sediment precipitated to the bottom of the flotation separation tank 10 is collected by a separate sludge scraper is sent to the sludge treatment tank to be treated.

As described above, since the present invention installs the aerator 20 in the center of the floating separation tank 10, the structure of the apparatus is simple, and the recirculation pump, the air compressor, the pressurized (pressure) container, the high pressure pump, etc. are not required. Of course, a tank for pre-stirring the floc FLOC is unnecessary. It also eliminates the need for flash mixers, air control valves, and the like. And it is easy to repair and repair the drive parts, there is an advantage that can be installed in a small area while the spray nozzle cleaning and underground piping is unnecessary. In addition, the present invention can increase the algae removal efficiency by floating the floc with a large amount of micro-bubbles generated by the impeller and ultrasonic waves rotating at high speed.

Then, the bird removing device 1 of the present invention further includes an electrolytic bath 100 for containing a copper ion (Cu ^{+ 2),} the number of algae removal process. The electrolyzer 100 may be disposed to face the treatment tank 80 and the wall as shown in FIG. 1, or may be connected through a separate connection pipe 138. As shown in FIG. 7, the algae removal device 1 is also connected to the treatment tank 80 through the connection pipe 148, and the treatment tank 80 is connected to the electrolytic cell 100 through the connection pipe 138. ). That is, one end of the connection pipe 138 is disposed in the treatment tank 80 and the other end is disposed in the electrolytic cell 100 to supply the treated water of the treatment tank 80 to the electrolytic cell 100. .

Referring back to FIG. 1, the electrolytic cell 100 is made of a body 102 that is made of concrete, plastic, or iron plate members and can process a certain amount of treated water. The electrolytic cell 100 is composed of left and right side walls, front and rear side walls and the bottom. An inclined surface 121 is formed at the bottom.

Reaction tank 105 to form a middle copper ion (Cu ^{+ 2)} reaction section 108 that is installed before and after dissociation of the tightly to the side wall main body 102 of the body 102. One side of the reaction unit 108 is formed with an inlet 107 of a predetermined size into which the treated water flows. And the other side of the reaction portion 108 is formed with a precipitation portion 109 of a predetermined size outflow of the treated water. Therefore, the treated water introduced into the inlet 107 flows to the settling unit 109 via the reaction unit 108. The inlet 107 is provided with an inlet 103 through which treated water flows, and the outlet 109 is provided with an outlet 104 through which treated water containing copper ions is discharged. The bottom of the main body 102 is inclined downward toward the settling section 109 from the inlet section 107 to discharge dissociation by-product sludge generated in the inlet section 107 and the reaction section 108 to the settling section 109. The inclined surface 121 is formed.

As shown in FIG. 4, the reaction vessel 105 is formed in a quadrangular box shape, forms an inner space for accommodating a plurality of copper electrode plates, and is configured such that treated water flows in from one side and flows out of the treated water to the opposite side. . More preferably, the reaction tank 105 is made of an insulating material such as polyethylene (PE), and consists of left and right side plates, front and rear side plates, and a bottom plate 155. They are assembled in the form of a rectangular box so that a reaction part 108 capable of accommodating a copper electrode plate is formed therein. At this time, a plurality of copper electrode plates are installed at regular intervals along the flow direction of the treated water.

The reactor 105 is installed in the main body 102 of the electrolytic cell 100 in an assembled state. That is, one side plate of the reaction vessel 105, that is, the left side plate in the drawing, is the rectifying plate 151 into which the treated water flows. The rectifying plate 151 consists of a porous plate having a plurality of through holes 152 formed therein. The rectifying plate 151 makes the flow of the treated water flowing into the reaction part 108 from the inlet part 107 uniform. The rectifying plate 151 rectifies the flow of the treated water, thereby preventing variation in the consumption amount of the copper electrode plate.

The other side plate of the reactor 105, that is, the right side plate in the drawing, is the overflow plate 153 through which the treated water is discharged. The wear 154 through which the processed water flows is formed at the upper end of the overflow plate 153. That is, the treated water containing the copper ions dissociated in the reaction unit 108 is supplied toward the precipitation unit 109 through the weir 154 of the overflow plate 153. The overflow plate 153 serves to supply the copper ions dissociated in the reaction unit 108 to the settling unit 109 together with the treated water, but blocks the dissociation by-products that have sunk down to the settling unit 109. do.

In addition, the precipitation unit 109 serves to settle and separate the dissociation by-products supplied to the precipitation unit 109 together with the treated water by providing a precipitation space having a predetermined size. A hopper portion 191 for collecting dissociation by-products is formed in the lower portion of the precipitation portion 109. More specifically, as shown in FIGS. 4 and 5, the reactor 105 includes a rectifying plate 151, a overflow plate 153, and a bottom plate 155 between front and rear side plates 157a and 157b facing each other. It is done by installing it. To this end, vertical coupling grooves 251 and 253 for coupling both ends of the rectifying plate 151 and the overflow plate 153 are spaced at regular intervals on the inner side surfaces of the front and rear side plates 157a and 157b facing each other. Formed (see FIG. 5). In addition, horizontal coupling grooves 255 for coupling the bottom plate 155 are formed at the lower ends of the front and rear side plates 157a and 157b. Therefore, when the rectifying plate 151, the overflow plate 153, and the bottom plate 155 are respectively inserted between the front and rear side plates 157a and 157b, a reaction box 105 of a rectangular box shape is assembled. In this case, a plurality of sludge discharge holes 156 are formed in the bottom plate 155.

On the other hand, a plurality of copper electrode plates 110 for dissociating copper ions into the treated water are installed at predetermined intervals in the reaction tank 105. The copper electrode plate 110 is formed of a generally rectangular panel (panel), but the coupling piece 111 is formed on both sides of the upper end so that + voltage or-voltage (anode or cathode) is applied through the electrode 120, respectively. do. And the coupling piece 111 is formed with a coupling hole 112 for fitting the electrode rod 120.

In addition, the hook piece 171 protrudes from the upper center of the copper electrode plate 110. And the hook piece 171 is formed with a hook hole 172 for fitting the support rod 170. The support rod 170 is for supporting a plurality of copper electrode plates 110, made of an insulating material or coated with an insulating material and having a predetermined length.

And both ends of the support bar 170 is fitted into the coupling coupling groove (see Fig. 5) formed in the inner side of the front and rear side plates (157a) (157b) to engage. To this end, support coupling grooves 270 to which both ends of the support rod 170 are inserted and fixed are formed at inner sides of the front and rear side plates 157a and 157b. The support coupling groove 270 is formed at a constant length in the middle between two vertical coupling grooves 251 and 253. The copper electrode plate 110 supported by the supporting rod 170 is installed at a lower end away from the bottom plate 155 so that dissociation by-products are smoothly discharged.

In addition, an air supply device 160 for ejecting air toward the copper electrode plate 110 is further installed in the reactor 105. As shown in FIG. 4 and FIG. 6, the air supply device 160 is supplied with air having a predetermined pressure through the air supply line 163-1 by an air pressurizing means such as a blower 163 and thus a reaction part ( 108) The air is blown into the aeration to make the mixing of the treated water and copper ions uniform. To this end, a plurality of diffusers 106 are installed in the reaction unit 108. Preferably, the diffuser device 106 is disposed to inject air into the lower portion of the copper electrode plate 110.

Therefore, when a voltage is applied to the plurality of copper electrode plates 110 by connecting a power supply to the electrode 120, the copper electrode plate 110 (positive electrode plate) to which + voltage is applied is applied, and the copper electrode plate 110 to which − voltage is applied. ) is - is a copper electrode plate (cathode plate) is to be a copper ion (Cu ^{+ 2)} in the positive electrode plate dissociation. At this time, the copper ions dissociated from the positive electrode plate has a fatal toxicity to the generation and growth of algae, so containing an appropriate amount of copper ions in the treated water has the effect of suppressing the generation of algae. In general, when the concentration of copper ions contained in water is 0.2ppm, algae do not occur, and at 0.4ppm or more, it is known that existing algae die and do not proliferate any more. In the water quality standards for wastewater treatment, copper ions are regulated to 3 ppm.

Therefore, the algae removing apparatus of the present invention includes a concentration adjusting device 180 for controlling the amount of dissociation of copper ions in the copper electrode plate corresponding to the positive electrode plate by adjusting the voltage or current applied to the copper electrode plate. The concentration controller 180 is a copper concentration value contained in the treated water using a copper concentration sensor installed in the control unit 130 and the copper concentration meter 132 and the precipitation unit 109 controlled by the control unit 130. Measure And the copper concentration value measured by the copper concentration meter 132 is transmitted to the control unit 130, the control unit 130 is supplied to the reaction unit 108 according to the copper concentration value of the copper concentration meter 132 or By controlling the current, the concentration of copper ions can be controlled.

However, dissociation by-products such as copper chips and debris generated during dissociation of copper ions are not detected by the copper concentration sensor and thus cannot be controlled. In particular, when the lower part of the reaction part is sealed, dissociation by-products accumulate in the lower part of the reaction part, and there is a problem of being released with the air bubbles and released into the natural world together with the treated water. In particular, dissociation by-products released into nature can have a fatal effect on aquatic life by generating high concentrations of copper ions over a long period of time. Therefore, it is necessary to periodically clean the dissociation by-products inside the reaction part to prevent the dissociation by-products from being discharged to the natural world. However, conventionally, no means for separating and safely removing dissociation by-products have been provided.

The algae removal device according to the present invention forms a precipitation section 109 at the rear end of the reaction section 108 and a transfer passage 125 for discharging dissociation by-products at the lower portion of the reaction section 108 to the precipitation section 109. The relatively light dissociation by-products supplied to the sedimentation unit 109 together with the treated water are precipitated and separated by gravity in the sedimentation unit 109, and the relatively heavy dissociation by-products are settled to the bottom of the reactor 108 to separate them. Next, by discharging to the sedimentation unit 109 through the sludge discharge hole 156 and the transfer passage 125 formed in the bottom plate 155 to minimize the discharge to the natural world with the treated water.

Preferably, the moving passage 125 is formed between the lower end of the reaction vessel 105 and the inclined surface 121 of the main body 102 by leg portions 256, 258 (see FIG. 5) installed at the lower end of the reaction vessel 105. do. The legs 256 and 258 have a predetermined height difference depending on the inclination of the inclined surface 121. More preferably, the moving passage 125 is connected to the inlet 107 so that a part of the treated water is supplied from the inlet 107. Therefore, the treated water supplied from the inlet 107 serves to transport the by-product sludge inside the moving passage 125 to the precipitation unit 109.

In addition, the precipitation part 109 is formed with a hopper part 191 for collecting dissociation by-product sludge. The hopper unit 191 is provided with sludge discharge means 190 for discharging the by-product sludge to the outside. The sludge discharge means 190 is composed of a discharge pipe line 192 installed to be connected to the hopper unit 191, a transfer pump 193 and a control valve 195 for transferring the sludge.

On the other hand, the copper electrode plate 110 is installed in the reaction unit 108, the coupling piece 111 is alternately arranged to one side and the other side. For example, the coupling piece 111 of the copper electrode plate 110 is positioned on one side or the right side (see FIG. 4), and then the copper electrode plate 110 disposed next is disposed on the other side or the left side. Then, the coupling piece 111 is positioned on the right side of the copper electrode plate 110, and then the coupling electrode 111 is positioned on the left side of the copper electrode plate 110. Mutual interference is excluded when the 120 is coupled, and the anode or cathode can be applied to the electrode 120, respectively. The positive electrode or the negative electrode applied to the electrode 120 is alternately applied to the negative electrode instead of the positive electrode and the negative electrode according to the control time input to the controller, that is, the set time.

The amount of copper ions (copper ion concentration) dissociated from the anode copper electrode plate 110 may be formed by a gap between the cathode plate and the anode plate, or by adjusting voltage and current. For example, since the oxidation rate of the anode copper electrode plate is increased while increasing the voltage or current, the copper electrode plate corresponding to the anode side becomes thinner, and thus the anode copper electrode plate must be replaced. To prevent this, apply + voltage to + copper electrode plate (anode plate) instead of + voltage to-copper electrode plate (cathode plate), and-apply + voltage to copper electrode plate (cathode plate) instead of + voltage to + copper It can be used by changing into an electrode plate (anode plate). As a result, the service life can be extended by simply changing the positive electrode and the negative electrode without replacing the copper electrode plate on the positive electrode side.

In addition, the +,-voltage or current applied to the copper electrode plate 110 installed in the reaction unit 108 is made by the power supply 131 of the controller 130 at set time intervals. When the copper electrode plate 110 corresponding to the positive electrode plate becomes thin, the power supply 131 replaces the copper electrode plate 110 by replacing + and − to supply the copper electrode plate 110 corresponding to the negative electrode plate to the positive electrode plate. Long-term use is possible.

The precipitation unit 109 is provided with a copper analyzer 132 to measure the concentration of copper ions contained in the treated water. Therefore, according to the measured value of the copper concentration meter 132, the amount of copper ions appropriate to the discharged water discharged to the outside of the electrolytic cell 100 by appropriately adjusting the voltage or current applied to the copper electrode plate 110 of the reaction unit 108 To be contained.

On the other hand, the power supply 131 controlled by the control unit 130 is an electrode rod coupled to each of the coupling piece 111 of the copper electrode plate 110, more specifically, the coupling hole 112 of the coupling piece 111 ( The anode or cathode is connected to the copper electrode plate 110 alternately at predetermined time intervals through 120.

The air of the predetermined pressure is supplied to the reaction unit 108 through the blower line 163-1 by the blower 163 and blown into the reaction unit 108, and into the reaction unit 108. The dissociated copper ions may be mixed well with the treated water in the reaction unit 108. In addition, by removing the contaminants and by-products attached to the surface of the copper electrode plate 110 in the air bubbles ejected from the diffuser device 106 to facilitate the dissociation of copper ions.

As such, the treated water mixed with copper ions in the reaction part 108 flows to the next settling part 109, and the treated water introduced into the settling part 109 precipitates dissociation by-products by gravity, The treated water is discharged into natural ecosystems. The dissociation by-product sludge collected in the hopper unit 191 of the precipitation unit 109 is discharged to the outside by the sludge discharge device 190 installed in the hopper unit 191. The sludge discharge device 190 is composed of a discharge pipe line 192 connected to the hopper unit 191 and a discharge pump 193 controlled by the controller 130. Therefore, when the dissociation by-products are accumulated in the hopper unit 191, the discharging by-products 193 are periodically discharged to the outside to prevent the dissociation by-products from being discharged into the natural water system through the outlet 104.

As described above, the algae removing apparatus 1 according to the present invention uses algae contained in raw water by using a large amount of microbubbles generated by the microbubbles generated in the aerator and the cavitation effect of the ultrasonic wave and the air bubble destruction effect of the ultrasonic wave. Float and remove the algae, and remove the algae, and supply the electrolytic treatment to the electrolytic cell, so that the treated water contains a predetermined amount of copper ions, and discharge the treated water containing a certain amount of copper ions into the water system. It can suppress algal outbreaks.

1: algae removal device 3: suction pump
10: flotation tank 20: aerator
21: impeller 22: impeller casing
24: drive motor 30: floc forming tank
41: opening 50: ultrasonic generator
51: ultrasonic vibrator 53: controller
60: scraper 70: inlet pipe
75: chemical injection tube 80: treatment tank
100: electrolyzer 102: main body
103: inlet 104: outlet
105: reactor 107: inlet
108: reaction part 109: precipitation part
111: coupling piece 112: coupling hole
120: electrode 130: control unit
131: power supply 132: copper concentration meter
135: treatment tank 136: pump
151: rectification plate 153: moon plate
155: bottom plate 156: sludge through hole
160: air supply device 163: blower
170: support rod 171: hanger
172: hook hole 180: concentration adjusting device
190: sludge discharge device 191: hopper portion

Claims (2)

In the algae removal device comprising a flotation tank for floating algae, and a scraper for removing contaminants injured in the water,
A floc forming tank installed in the center of the flotation separation tank;
An aerator installed to be located inside the floc forming tank;
An inlet pipe installed to supply raw water including algae to the inside of the floc forming tank;
A chemical inlet tube connected to the inlet tube and injecting a flocculant;
An ultrasonic generator installed under the inlet pipe;
A treatment water tank provided at one side of the floating separation tank and storing treated water from which algae is removed by the scraper;
It is configured to include an electrolytic cell in which a plurality of copper electrodes are installed to contain copper ions in the treated water supplied from the treated tank,
The electrolyzer includes a main body forming an inner space of a size capable of treating a predetermined amount of treated water;
It is installed inside the body of the electrolytic cell and constitutes a reaction part of a predetermined size to accommodate a plurality of copper electrode plates that dissociate copper ions into the treated water, and on one side, a rectifying plate made of a porous plate is installed so that the treated water is uniformly introduced. And, the other side is installed in the upper end of the overflow plate formed with the wear to the treated water is discharged, the bottom of the reaction vessel consisting of a bottom plate formed with a plurality of sludge discharge holes to discharge the by-products generated from the copper electrode plate;
Air supply means for ejecting air into the reaction tank to uniformly mix the treated water and copper ions in the reaction unit and to separate the dissociation by-products attached to the copper electrode plate;
The reactor is installed in the center of the main body of the electrolytic cell and partitions the inner space of the electrolytic cell into a predetermined size inlet and settled, the bottom surface of the body to form an inclined surface inclined from the inlet to the settling portion, A transfer passage for transferring the dissociation by-products discharged from the reaction unit to the sedimentation unit is formed between the bottom and the bottom of the main body, and the hopper unit forms a hopper for collecting dissociation by-products in the sedimentation unit and dissociation by-product sludge in the hopper unit. Air flotation algae removal device characterized in that the sludge discharge device for discharging to the outside. In the air-floating algae removal device comprising a flotation tank for floating algae, and a scraper for removing contaminants injured in the water,
A floc forming tank installed in the center of the flotation separation tank;
The drive motor is installed to be located inside the flocculation tank and provides a driving force, a rotation shaft connected to the drive motor, an impeller connected to the rotation shaft, and an impeller casing surrounding the impeller, wherein the impeller casing is constant A plurality of wedge bars having a triangular cross section vertically arranged at intervals and a plurality of round annular rod bars disposed to be separated from each other to surround and fix the outer circumferential surface of the wedge bar and a disc attached to block the top surface of the wedge bar. An aerator comprising;
An inlet pipe installed to supply raw water including algae to the inside of the floc forming tank;
A chemical inlet tube connected to the inlet tube and injecting a flocculant;
An ultrasonic generator installed under the inlet pipe;
A treatment water tank provided at one side of the floating separation tank and storing treated water from which algae is removed by the scraper;
It comprises an electrolytic cell in which a plurality of copper electrodes are installed to contain copper ions in the treated water supplied from the treated tank,
The raw water supplied from the inlet pipe and the bubble supplied from the aerator are ejected into the region of the ultrasonic wave radiated from the ultrasonic generator to kill algae and generate a large amount of micro bubbles to facilitate the flotation of the floc, An air-floating type algae removal device comprising copper ions contained in the treated water passing through to prevent algae from flourishing in the water after being discharged into the water system.

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