KR100352584B1 - A Water Purifier Ship - Google Patents

Abstract

The present invention relates to a device for removing algae such as green algae, red tide, nutrients such as nitrogen and phosphorus, and pollutants generated in large reservoirs, dams and seas. A device that flocculates materials and floats flocs using pressurized water, wherein a vessel equipped with a driving device is used to inject chemicals and pressurized water into the water system and collect, dehydrate and store the flocs. .

Description

A Water Purifier Ship

The present invention relates to a water purification vessel for removing algae and suspended substances generated in large-scale reservoirs, dams, rivers and seas, more specifically in the site (in-site) mixed with the term "coagulant" The present invention relates to a ship that can remove algae and contaminants by administering and using dissolved air flotation (DAF).

Due to the deterioration of water by nutrients such as nitrogen and phosphorus contained in fertilizer, livestock wastewater, domestic sewage and factory wastewater, green algae are generated in rivers and lakes, and red algae in the ocean are destroying ecosystems. Water nutrients eutrophicated by nutrients contained in the waste water cause the algae to thrive. When the algae thrives on the surface of the water, it prevents the light from penetrating, thus preventing the photosynthesis of aquatic organisms and lowering the oxygen dissolution rate in the water, thus losing the self-cleaning ability of the water.

Green algae and red algae generated by eutrophication can shut off the oxygen supply to water and kill fish and fish that live in the water. In addition, when the red tide phenomenon occurs in the water supply source, algae taste problem occurs due to algae water purification, and excessive chlorine disinfection, trihalomethane (THM) can be formed. In Korea, hundreds of billions of won are incurred every year due to the occurrence of green algae and red tide, which are annual events in spring and autumn, which requires a revolutionary treatment of algae.

Conventional methods for removing algae, such as green algae and red tide, that occur in lakes, dams, rivers, and seas, inhale water containing algae to remove algae by dehydration or to sprinkle ocher soil to settle (patent application 1998). -13742). However, these methods temporarily deal with green algae and red algae that occur in large areas, but have problems such as flocculation flocs settling on the bottom and causing secondary pollution to the bed and seabed ecosystems.

Utility Model Registration No. 123407, in the algae removal device of the algae removal vessel, sucks up water containing algae and pulls it up to the ship while transporting algae by a conveyor belt, and removes algae by allowing water to fall into the bottom of the conveyor belt. It relates to a device to. However, the algae removal device is useful only for the removal of algae floating on the water surface and is generally inadequate for removing algae that occur in large quantities between 1 to 3 meters in water. In addition, it is difficult to completely remove microalgae and nutrients such as nitrogen and phosphorus by using a mechanical device called a conveyor belt.

Patent application No. 1998-35437 relates to a method of removing contaminants in seawater by raising seawater containing red tide and placing it in an electrolysis tank, forming an anode and a cathode on both sides of the electrolysis tank to cause an electrolysis reaction. . However, the electrolysis method is not suitable for removing algae generated in large quantities in the ocean or large lakes due to the significant decrease in efficiency as the amount of water to be treated increases.

Patent application No. 1998-40615 relates to a system for detecting red tide concentrations around aquaculture farms to reduce red tide damages by diluting the red tide concentrations on the surface using low-level water and blocking light from the fisheries when red tide occurs. However, the system is to prevent dilution of red tide concentration and diffusion of red tide, and is not a method of essentially removing red tide.

Patent No. 174365 introduces eutrophicated lake water, injects flocculant into the flocculation tank and rapidly stirs it, then moves to the flocculation tank to coarse the floc and floats the floc with pressurized water in the flotation tank, The present invention relates to a method and apparatus for concentrating and dehydrating and treating a concentrator using pressurized water. However, the apparatus forms flocculation tanks, flocculation tanks and flotation tanks in large enclosures, and floats them in water systems using buoys, which lacks maneuverability. Not suitable for processing

Japanese Patent Laid-Open No. 3-293090 relates to a sewage purification line and a method for purifying lake water with an electrolytic device on the hull. More specifically, the electrolysis reaction is performed by forming an anode and a cathode on both sides of an electrolysis tank. It relates to a water purification method of the electrolysis method to remove the contaminants. However, this method is not only time consuming, but is also less efficient when the flow rate of the treated water increases (see Table 1 in JP-A-1998-82153) to remove large amounts of algae from the ocean or large lakes. Not suitable In addition, the floc formed by the electrolysis is configured to be recovered by the trailing trap, but in fact, because the floc is settled in the natural state, some flocs that are not recovered by the trap are settled to the bottom and thus cannot be completely purified. will be.

Accordingly, the present invention is to solve the above problems to provide an apparatus that effectively removes the algae and contaminants generated in lakes, rivers and the ocean in-site (no site) without the need for a separate treatment tank.

In addition, the present invention improves the applicant's prior patent application No. 99-44715 as a vessel instead of a group of vessels to separate the water treatment target, smooth the reaction of the treatment water and the chemicals, pressurized water, and The intention is to provide an improved device that makes water separation more complete.

1 is a front view of the apparatus of the present invention.

Figure 2 is a side view schematically showing the device of the present invention.

3 is an enlarged view of a front guide plate and a rear guide plate of FIG. 2;

Figure 4a, b shows embodiments of the pressurized water injection device according to the present invention.

Figure 5 is a plan view showing a connection structure, such as pressurized water production apparatus and chemical tank.

<Description of Drawing>

10: barge 11: shipboard

12: drive means 13, 13 ': vertical plate

20: chemical tank 21: chemical pump

22: chemical injection device 30: pressurized pump

31: air compressor 32: pressurized tank

33: pressurized water injection device 34: high pressure pipe

40: floc collection device 41: floc storage tank

51: front guide plate 52: rear guide plate

61: laminated separator 70: control panel

71: generator

In order to achieve the above object, the present invention provides a device for flocculating algae and contaminants using flocculant and floating flocs using pressurized water. The water is sprayed in the water system and the floc is collected, dehydrated and stored. That is, a flocculation chemical tank, a pressurized water production device, etc. are installed on a ship having a plate formed of a material such as plastic on both sides of the lower side, and a floating underwater structure is installed so as to be located 1 to 5 m below the water surface. The front and rear guide plates for guiding the water to be treated to the chemical injection device and the pressurized water injection device and the medicine and the pressurized water injection device are installed in accordance with the direction of travel.The guide plates for collecting the flocs are installed at the bottom and the rear of the injection device. Place the floc dehydrator and floc reservoir on board.

More specifically, the water purification vessel of the present invention is a chemical tank for storing the coagulant drug, a chemical pump for supplying the coagulant drug stored in the drug tank to the drug injection device, a pressurized pump for supplying the treated water or the treated water to the pressure tank. Compressor for supplying compressed air to the pressurized tank, pressurized tank for storing the pressurized water mixed and dissolved by the water supplied by the pressurized pump and the compressed air by the compressor, chemical injection device, pressurized water injection device In the water treatment apparatus to agglomerate contaminants using flocculation chemicals and to float flocs using pressurized water, a vertical plate is formed at both lower ends of a barge provided with a driving device, and the water to be treated is flocculated with chemicals and pressurized. Front and rear guide plates to guide the mixing well with water, and flocculant drugs supplied through the chemical pump in the water to suspended matter such as algae A chemical spray device for spraying water to be treated and a pressurized water injector for discharging the pressurized water in which air is dissolved from the pressurized tank, and a floc storage tank for collecting the flocs, and a floc storage tank on the back of a ship or barge Characterized in that the installation.

In addition, the vertical plate is preferably formed of a reinforced plastic material, it characterized in that it is possible to float by containing air therein.

Referring to the configuration and operation of the water purification vessel of the present invention in more detail with reference to the drawings as follows.

The barge for removing algae and pollutants 10 floats in the water system where algae live mainly. Chemical tank 20 for storing the power and flocculating chemicals, chemical pump 21 for supplying the flocculating chemicals stored in the chemical tank to the chemical injection device, pressurized pump 30 for supplying the water to be treated or the treated water to the pressurized tank Compressor 31 for supplying compressed air to the pressurized tank, pressurized tank 32 for mixing and dissolving the water supplied by the pressurized pump and the compressed air by the compressor and storing pressurized water containing dissolved air. ) Is positioned on the ship 11. The component devices may be located on a separate vessel, not on a barge, or may be located offshore or in the bottom if the area of the water body to be treated is not large. The barge is equipped with a drive device 12 such as a propeller to enable navigation (see FIG. 2).

Vertical plates 13 and 13 'are installed on both sides of the lower barge. The vertical plates 13 and 13 'are preferably made of a light and rigid plastic material, more preferably reinforced plastic. It is more preferable that the vertical plate forms a space for injecting air therein to facilitate the injury. This vertical plate also serves to separate the water system to be treated for in-site water treatment as well as for injury purposes.

In front of the barge, between the vertical plate is installed an underwater structure, preferably a steel pipe structure that can withstand the flow of sea water. Chemical injection device and pressurized water injection device are to be installed in the structure. Instead of installing the underwater structure separately, a chemical injection device, a pressurized water injection device, etc. may be configured as a tube with a nozzle.

As the device of the present invention is operated, the water to be treated is guided and flows toward the chemical injection device and the pressurized water injection device installed in the water by the front guide plate 51 and the rear guide plate 52. The front guide plate is formed obliquely from the upper side to the rear side as shown in FIG. 2, and water containing algae, etc., is directed toward the chemical injector and the pressurized water spraying device as the barge progresses, so that flocculation, floc formation, and injury occur. do. At this time, it is preferable that the drug injector and the pressurized water injector are sprayed upward and / or forward. As shown in FIG. 2, the rear guide plate extends from the lower surface of the chemical injector and the pressurized water injector, and forms an angle toward the upper side of the rear side, so that flocs formed by flocculation by the coagulant do not settle to the bottom of the water system. It performs a function of inducing to rise to the surface smoothly (see Figure 3).

At this time, the supply process of the flocculant and the mixing with water is different from the prior art by supplying the flocculant through the chemical pump from the chemical tank for storing the flocculant to the raw water supply pipe without installing a separate flocculant injection device (or flocculant injection device) (See Fig. 5). Raw water supply pipe means a water supply pipe supplying raw water or treated water to the pressurized tank. Coagulant and pressurized water in the process of vigorous mixing of water and air in the pressurized tank by supplying raw water supply pipe without the reaction tank (rapid mixing tank and floc forming tank) and the process of injecting and stirring the coagulant into the raw water with a separate injection device. Homogeneously distributed within.

Alternatively, instead of installing the chemical pump supplying the flocculating chemicals to the front end of the pressurized tank, it may be connected to the rear end of the pressurized tank and the front end of the pressurized water injection device.

In order to form flocs by administering a flocculant in the conventional water purification apparatus and method using a pressure flotation method, a rapid blending tank and a slow blending tank (floc forming tank) are required in addition to the flocculant dosing apparatus, as well as changes in water quality and agitation. There is a difficulty in controlling the amount of flocculant precisely according to the speed and the residence time in the mixing tank. There was a problem in that no flocs were formed or floc formation efficiency was significantly lowered.

However, when the chemical pump for supplying the flocculating chemicals is connected to the front or rear end of the pressurized tank and sprayed into the water together with the pressurized water as in the apparatus of the present invention, a separate rapid mixing tank and a slow mixing tank are not required, so the equipment cost is low. It takes less time and shortens the time, and adjusts the dosage of the flocculant according to one factor such as water quality, thereby significantly improving the flocculation and flocculation efficiency compared to the prior art.

Algae and suspended solids react with flocculant supplied by the chemical injector to form flocs. Injection of the coagulant medicine supplies the coagulant from the chemical tank 20 using the chemical pump 21 in the chemical injector 22. The floc formed by the flocculation chemical spray is attached to the surface of the water system by the microbubbles of the dissolved air. That is, a portion of raw water or treated water is injected into the pressure tank 32 through the pressure pump 30, and then the water is pressurized to a pressure of 1 atm or higher, preferably 4 to 7 atm, using the compressor 31. Saturate the dissolved air sufficiently. Fine air bubbles are generated by supplying pressurized water saturated with the dissolved air through the pressurized water injection device 33. Air dissolved in the pressurized water is rapidly released under atmospheric pressure to form fine air bubbles, so that flocs, suspended matter, algae, etc. (hereinafter referred to as "floc" in the present specification) refers to floating algae, suspended matter, pollutants, and the like. Attached to the water surface). That is, the floc formed by the flocculating chemicals is floated on the water surface by about 10 to 100 μm of fine air bubbles generated by the pressurized water injected from the pressurized water injector 33.

In the apparatus of the present invention, the coagulant drug is injected into the pre or post stage of pressurized water production, so that the drug injector 22 and the pressurized water injector 33 are not separately installed, and the coagulant drug and the pressurized water are simultaneously sprayed through the same device. do. That is, when flocculating chemicals are added to the water supplied to the pressurized tank by pulling up part of raw water or treated water, the flocculating chemicals are injected at high pressure through the pressurized water injection device to mix the flocculating chemicals with algae in the treated water. , Flocculate to form a floc, and the floc formed by the injected pressurized water rises to the surface.

In addition, the chemical injector and the pressurized water injector (22, 33) may add a depth adjusting device that can adjust the depth from the water surface as needed. In other words, when the algae breeds to a large depth deeply, the depth of the injector is adjusted to effectively flocculate and float.

The pressurized water injection device may have a structure such as a nozzle. The pressurized water injection device may be provided with one or more injection devices, and may be moved back and forth in accordance with the flow rate of the sea water or river and the moving speed of the barge. In addition, when the amount of suspended matter or algae to be treated is large, it is possible to increase the treatment efficiency by operating a plurality of pressurized water injection device.

In operating the nozzle type pressurized water injector through the one valve in the present invention, when the length of the injector having a plurality of nozzles becomes long, turbulence occurs in the nozzle close to the valve. By the way, the floc adheres to the microbubbles and the efficiency of the flotation increases as the size of the microbubbles is smaller and the pressure of the pressurized water is higher. Therefore, when the air bubbles collide with each other to form large air bubbles due to the generation of turbulence, a problem that the adhesion efficiency of pollutants by the pressurized water is significantly lowered.

In the present invention to solve this problem it is possible to solve the above problems by operating a plurality of pressurized water injection device through a plurality of valves from the pressure tank (see Fig. 1).

Another method is to increase the contaminant adhesion efficiency of the pressurized water by preventing the turbulence by forming a larger diameter in the central pipe close to the valve and a smaller diameter pipe at the edge away from the valve. 4a, b).

The floc formed by the injected flocculant and the injected pressurized water rises to the surface. If necessary, a separator plate in which a plurality of plates are stacked may be added to the rear end of the rear guide plate so that contaminants or algae may be easily floated due to the specific gravity difference with water. The plate is formed with a plurality of through-holes so that water with a large specific gravity and pollutants with a small specific gravity pass through the bottom and top, respectively. In addition, the plate may be applied in a planar shape, a shape in which a plurality of valleys and floors are repeated like a slate plate, and an egg plate shape formed of a plurality of valleys and floors. The laminated separator can further increase the separation efficiency, that is, the removal efficiency, particularly when contaminants having a low specific gravity such as oil are contained in the water to be treated.

Floated flocs are collected by a floc collection device 40 such as a floc suction device or a scraper, and the flocs are transferred to the floc storage tank 41. The floc reservoir is installed at the rear of a ship or barge.

In addition, a dehydration device may be added to the rear of the floc collecting device to dehydrate the collected floc and to transfer the floc to the floc storage tank and to reduce the treated water from which the floating material is removed to the water system.

The apparatus of the present invention can be added to the flocculating drug injection control device that can measure the water quality of turbidity, pH, alkalinity, water temperature and the like by using a sensor to adjust the amount of flocculant required in real time.

Furthermore, in the apparatus of the present invention, a pressurized water injection control device is added to measure the water quality, such as turbidity and pH, so that a large amount of flocculant is injected and a large number of flocs are generated. If the amount of flocculant and floc is small, the number of pressurized water injectors operated can be reduced.

The apparatus and method of the present invention can be applied not only to small lakes but also to large lakes and coastal seas created by dams.

As described above, the present invention can effectively remove algae and contaminants generated in lakes, rivers, and the sea, etc., in site without the need for a separate treatment tank.

In addition, the apparatus of the present invention increased the flocculation and flocculation efficiency of the contaminants by introducing the flocculating chemicals into the previous stage or immediately after the pressurized water production.

In addition, the present invention effectively improves flocculation, flocculation and flotation efficiency by using the vertical plate, front guide plate, and rear guide plate in the water system to be treated without introducing the raw water into a separate treatment tank, thereby effectively preventing algae and suspended matter. Can be processed.

In addition, the present invention solves the problem that the efficiency of floating the floc of the pressurized water due to the generation of turbulence in the pressurized water injection device is solved.

Claims (5)

Chemical tank for storing flocculated chemicals, Chemical pump for supplying flocculated chemicals stored in the chemical tank to the chemical injection device, Pressurized pump for supplying treated water or treated water to the pressurized tank, Compressor for supplying compressed air to the pressurized tank And a pressurized tank for storing the pressurized water mixed with the water supplied by the pressurized pump and the compressed air by the compressor, and a pressurized water, a chemical injection device, and a pressurized water injection device. In the water treatment apparatus which floats a floc using pressurized water, Vertical plates are formed at the lower ends of both sides of the ship provided with a driving device, Front and rear guide plates for guiding the water to be well mixed with the flocculating agent and pressurized water, A chemical injection device for injecting agglomerated chemicals supplied through the chemical pump into water to be treated containing suspended solids such as algae and a pressurized water injection device for discharging pressurized water in which air is dissolved from the pressure tank; , And a floc storage device for collecting the floc, and a floc storage tank for storing the flocs collected by the floc collection device on a shipboard or a barge rear side. The water purification vessel of claim 1, wherein the chemical injector and the pressurized water injector comprise a plurality of valves and a plurality of injectors. The water purification vessel of claim 1, wherein the chemical injector and the pressurized water injector form a larger diameter on the side close to the valve and a smaller diameter on the side away from the valve to prevent turbulence. The water purification vessel according to any one of claims 1 to 3, wherein the vertical plate is made of a reinforced plastic material and contains air therein so as to be floated. The water purification vessel according to any one of claims 1 to 3, wherein a laminated separator is added to the rear end of the rear guide plate.