KR101706286B1 - Water Treatment System Equipped With High Capacity Separation Tower - Google Patents

Abstract

The present invention relates to a water treatment apparatus using a large-capacity separation tower, and more particularly, to an apparatus for separating suspended matters, sediment, and treated water by supplying raw water containing suspended matters to a large-capacity separation tower after supplying flocculant.
Since the water treatment apparatus according to the present invention uses a device with minimized mechanical movement, it is easy to change the design when the treatment device is expanded according to the capacity, and since the natural material is used as the flocculant, useful.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a water treatment system having a large-

The present invention relates to a water treatment apparatus having a large capacity separation tower, and more particularly, to a water treatment apparatus having a large capacity separation tower, and more particularly, to a water treatment apparatus having a large capacity separation tower, And the like.

Water is an indispensable resource for all human economic, social and cultural activities. However, due to population increase, rapid increase of water consumption due to industrialization, and water pollution caused by environmental pollution, the water shortage situation is getting worse each year.

In the summer when the water temperature rises, reservoirs, lakes, fisheries, offshore waters or running water are also producing green tides or red tides. These green algae or red tide not only destroy fishes in the lake or sea farm, but also aquatic plants, causing destruction of ecological environment as well as bad odors.

In general, algae phenomenon is caused by eutrophicated lakes or floodplains (phytoplankton) in a slow stream, which are accumulated on the surface of water and change the color of the water remarkably to green. It is known that the cause of the algae phenomenon is adversely affecting aquatic plants by the toxic cyanobacteria. For example, it causes serious problems such as the effects of toxins on human body and livestock, ecological problems caused by ecosystem destruction, fish deficiency due to oxygen deficiency and various kinds of aquatic organisms.

In addition, the red tide phenomenon refers to the phenomenon that the color of the seawater changes in red color due to the proliferation of a large amount of phytoplankton. When the creature causing red tide is caused by the ciliate or diatoms classified as euglena or protozoa The red tide phenomenon has recently been shown widely in the southern coast of Korea, the west sea, and the southern coast of the East Sea, and the red tide creatures are moving from the center of the diatoms to the center of the flagellated tide, Due to this trend, red tide damage is increasing every year.

In recent years, such rust and red tide phenomenon has occurred as a characteristic of wide area, toxicity, and prolongation, and development of technology for solving this is urgently required.

Conventional techniques for solving such phenomenon include a method of adsorbing a green or red tide with electrostatic adsorption power by using a chemical sterilizing method using a chlorine agent or ozone, A filtration method in which a green and a red tide are separated and removed from water, a method of removing algae using microorganisms, an ultrasonic wave, and a tidal line are generally used.

Chemical disinfection using chlorine chemicals or ozone has the advantage of long lasting effect of sterilization due to residual chlorine or ozone in water. However, chlorine or ozone is toxic to most living organisms and secondary damage .

A flocculation treatment method using yellow loess (Korean Patent Registration No. 10-1355178) is a method of flocculating and precipitating suspended solids using colloid particles of loess. When a large amount of loess is used, a large amount of suspended solids, . However, the colloid particles of the loess have a role of simply precipitating the suspended solids. Accordingly, when used in a lake or in the sea, the precipitated green tide is decomposed, resulting in deterioration of water quality. When used in a separation apparatus, And a step of separating the substrate from the substrate.

In order to solve such a disadvantage, a method of floatation of a floating material by using a flocculant has recently been developed.

When surfactant microbubbles are used (Korean Patent Registration No. 10-0742509), since the suspended solids are floated on the treated water by the Isegi capsule, the treatment is simple, but it is necessary to supply additional surfactant and to treat a large amount of algae It is possible that the water quality deteriorates due to the added surfactant.

Korean Patent Registration No. 10-0919367 discloses a flotation separation apparatus using a gas dissolving tank. This device supplies pressurized water to the micro-bubble generating device, and the micro-bubbles generated at this time are supplied to the floating tank to float the floating material. However, the above-mentioned invention has disadvantages in that a larger number of pressurizing devices and gas dissolving tanks are required to be installed as the throughput increases, and the amount of energy to be pressurized is also increased.

Korean Patent Laid-Open Publication No. 2014-0025757 discloses a method for producing shale gas using concentrated water of a fresh water plant. In this invention, although a method of hydro-crushing a shale gas layer using concentrated water of a fresh water plant is requested, environmental wastewater pollution is expected due to the fact that separate wastewater treatment process is not visible.

As a result, the present inventors have made intensive efforts to solve the above problems, and as a result, they have found a separating tower capable of treating a large volume, adding a natural coagulant to wastewater and then injecting the coagulant into the large- (TP) and chemical oxygen demand (COD) can be improved. As a result, the present invention has been completed.

It is an object of the present invention to provide a water treatment apparatus having a large capacity separation tower and a water treatment method.

Another object of the present invention is to provide a mobile water treatment apparatus in which the water treatment apparatus is mounted on a movable vehicle.

In order to achieve the above object, the present invention relates to a method of manufacturing a tower tank, comprising the steps of: (a) mixing an influent and a flocculant into a top side of a tower tank; (b) a cylindrical tower tank consisting of an upper layer where inflow water is treated and a lower layer in which the supernatant separated temporarily is stored; (c) a specific-gravity separation pipe located at the center of the tower tank and having a cylindrical shape with an upper end clogged and a high-boiling substance in the tower tank at the lower end thereof fed inward; (d) an upper portion located in the inside of the above-mentioned specific gravity separating pipe and having an opening at its upper end, and a lower end connected to a lower portion of the cylindrical tower tank to supply the upper portion of the high- Separation pipe; (e) an impeller disposed between the specific gravity separating pipe and the cylindrical tower tank and mixing the treated water by rotation to separate the suspended material according to the specific gravity; (f) a rotating motor located at the top of the cylindrical tower tank and connected to the impeller inside the separation tower to rotate the impeller; (g) means for discharging the treated water separated from the upper water separation pipe, which is located on the lower side of the cylindrical tower tank; (h) means for discharging a substance to be settled in the lower portion of the upper portion of the cylindrical tower tank, the lower portion of which is settled in the lower portion of the specific- And (i) means for discharging the floating material floated above the upper side of the upper portion of the cylindrical tower tank, and a water treatment method using the same.

The present invention also provides a mobile water treatment apparatus in which the water treatment apparatus is mounted on a movable vehicle.

Since the water treatment apparatus according to the present invention uses a device with minimized mechanical movement, it is easy to change the design when the treatment device is expanded according to the capacity, and since the natural material is used as the flocculant, useful.

1 is a schematic flow chart of a water treatment apparatus according to the present invention.
2 shows a large capacity processing tower according to the present invention.
Figure 3 shows a conventional hydrocyclone.
Fig. 4 shows a hydrocyclone having a cone-type blocking means.
Figure 5 shows a hydrocyclone with diamond-type blocking means.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. In general, the nomenclature used herein is well known and commonly used in the art.

In the present invention, raw water mixed with a coagulant made of a natural material is injected into a large-capacity separation tower to confirm that efficient water treatment is possible.

Accordingly, in one aspect, the present invention provides a process for the preparation of a tower tank comprising: (a) means for mixing influent and flocculant to supply to the upper side of the tower tank; (b) a cylindrical tower tank consisting of an upper layer where inflow water is treated and a lower layer in which the supernatant separated temporarily is stored; (c) a specific-gravity separation pipe located at the center of the tower tank and having a cylindrical shape with an upper end clogged and a high-boiling substance in the tower tank at the lower end thereof fed inward; (d) an upper portion located in the inside of the above-mentioned specific gravity separating pipe and having an opening at its upper end, and a lower end connected to a lower portion of the cylindrical tower tank to supply the upper portion of the high- Separation pipe; (e) an impeller disposed between the specific gravity separating pipe and the cylindrical tower tank and mixing the treated water by rotation to separate the suspended material according to the specific gravity; (f) a rotating motor located at the top of the cylindrical tower tank and connected to the impeller inside the separation tower to rotate the impeller; (g) means for discharging the treated water separated from the upper water separation pipe, which is located on the lower side of the cylindrical tower tank; (h) means for discharging a substance to be settled in the lower portion of the upper portion of the cylindrical tower tank, the lower portion of which is settled in the lower portion of the specific- And (i) means for discharging suspended matter floated above the upper-side upper-side surface of the cylindrical tower tank, and a water treatment apparatus using the same.

In the present invention, the water treatment apparatus may further include a hydrocyclone for removing suspended solids in the influent water. Separation towers that remove floats using flocculants can be inefficient if large floats are introduced. Therefore, various kinds of pretreatment devices can be used to primarily remove such suspended matters, but hydrocyclones can be preferably used.

In the present invention, the hydrocyclone includes (i) a cylindrical body having a narrowed bottom portion; (ii) an inlet port (100) provided on one side surface of the main body; (iii) a low specific gravity material outlet (200) installed through the upper portion of the main body; (iv) a high-boiling material discharge port 300 located at the lower end of the main body; And (v) blocking means (400, 401) located at the center of the high-boiling material discharge port for preventing the separated high-boiling substance from being discharged to the upper portion due to the rise of the low specific gravity material have. The hydrocyclone separates water with low specific gravity and suspended matter with high specific gravity by centrifugal force. The suspended matter having a high specific gravity is discharged (300) through the lower part of the hydrocyclone. At this time, some of the suspended matters gathering at the lower part of the stagnant state rise (320) through the low-pressure part of the central part formed by the centrifugal force, and thus can be discharged to the outside through the upper part together with the water.

In order to prevent such a phenomenon, the blocking means (400, 401) are provided at the central portion where the pressure is lowest at the outlet, and the suspended material is discharged (300) into the gap between the blocking means and the outlet, It is possible to minimize the upper discharge due to the pressure difference since it is not stagnated in the center portion. Accordingly, it is preferable that the blocking means is a cone shape 400 having a narrow upper portion or a diamond shape 410 having a narrow upper portion and a lower portion.

In the present invention, the hydrocyclone may be characterized in that 2 to 30 hydrocycles are arranged in parallel. Although the use of only one large-capacity hydrocyclone can have a desired separation effect, the larger the volume of the hydrocyclone, the larger the volume occupied, and the higher the pressure required, the higher the installation cost and the operating cost. Therefore, it is possible to design a water treatment apparatus with a reduced operation cost and miniaturization by using a cyclone in which a plurality of hydrocyclones are arranged in parallel. In this case, 2 to 30 hydrocyclones are preferably connected in parallel.

In the present invention, the inflow water may be green tide / red tide containing water, micro tide containing water, sewage, wastewater or shale gas runoff.

In the present invention, the supplying means of the step (a) may be arranged such that the raw material supplied in the tangential direction of the cylindrical tower tank is rotated. When the supply pipe is installed in the tangential direction of the cylindrical tower tank when raw water is supplied, the raw material is supplied and the raw material in the process is rotated. Therefore, the raw material is mixed smoothly, and the suspended matter is floated more rapidly.

In the present invention, the tower tank (1) may further include a catalytic terminal (13) for electrocoagulation on its inner surface. When using the general flotation separation method, it takes time not to be separated by specific gravity. However, in the present invention, since the electrochemical agglomeration is performed using the catalyst terminal 13 made of platinum in the inside of the tower tank, the floating time of the suspended material in the tower tank can be minimized. At this time, it is preferable to supply electricity of 1 to 30 V to the catalyst terminal 13, but it is not limited thereto. In addition, since the flocculation method is used, it is preferable to float the inflow water in the tower tank for 1 to 5 minutes to perform flotation, but the present invention is not limited thereto. The catalyst terminal is preferably installed between the specific-gravity separation pipe and the tower tank so as to facilitate floatation of the suspended material, and it is preferable that the catalytic terminal is installed at the upper part and the lower part of the specific- desirable.

In the present invention, the impeller (14) is located between the specific gravity separation pipe and the cylindrical tower tank, and mixes the process water by rotation to separate the suspended material according to the specific gravity. Even if the influent water does not agitate, the floating material floats due to the specific gravity. However, when agitating the flocculating material, coagulation occurs at a higher speed and the separation time can be shortened. Therefore, it is preferable to install the impeller 14 inside the tower tank to continuously stir the influent water. At this time, since the specific-weight separating pipe is located at the center of the tower tank, it is preferable that the impeller is made in an inverted U shape so that the inflow water around the specific-weight separating pipe is stirred or connected to the impeller connecting portion 7, Any shape can be used without restriction as long as it can stir the tube periphery. Further, the impeller 14 is rotated by a rotary motor 8 installed at the top of a cylindrical tower tank, and the number of revolutions is preferably 1 to 10 per minute, but the present invention is not limited thereto.

In the present invention, the cylindrical tower tank may be constituted of an upper layer to which inflow water is treated and a lower layer to temporarily store the supernatant. In the upper part of the cylindrical tower tank, separation is made according to the specific gravity by the specific gravity separation pipe (2) and the upper part separation pipe (3). In the lower part of the tower tank, the treated water recovered in the upper water separation pipe (3) Some are recovered and supplied to the upper part of the tower tank to be sprayed (6) to remove bubbles from the suspended body, and the remaining part is discharged (11). At this time, it is preferable, but not limited, that the tower tank is separated from the uppermost portion and the lowermost portion of the tower tank at the boundary of 3/4 point.

In addition, the large capacity separation tower of the present invention minimizes the device having mechanical movement inside, unlike the conventional water treatment apparatus, so that the capacity of the separation tower can be increased by designing a large capacity water treatment apparatus, It is possible to expand the capacity of the separation tower due to the design change so that it can be applied to water treatment facilities having various conditions.

In the present invention, the water treatment apparatus may further include means for reducing the generation of bubbles due to suspended substances by recirculating a part of the treated water present in a lower portion of the cylindrical tower tank to spray the upper part of the tower tank . In the inversion treatment method, floated suspended matters are often foamed to fill spaces in a tower tank. Therefore, in order to suppress the generation of such bubbles, the water recovered in the lower part of the tower tank may be partially recirculated and sprayed (6) from above the separation tower to suppress the generation of bubbles.

In the present invention, the water treatment apparatus may further include (j) means for injecting the treated water discharged from the separation tower into the heat exchanger to recover the waste heat of the treated water. The raw water flowing into the water treatment apparatus may have a temperature higher than room temperature, and the inside of the water treatment apparatus may be heated to increase the reaction rate and the floatation rate. Therefore, when waste heat is discharged from the heat exchanger, the efficiency of the water treatment apparatus can be maximized.

In the present invention, the upper water isolation pipe may have a height adjusting unit at an upper end thereof to adjust the amount of the water to be introduced into the same. The height of the supernatant separation tube is determined by the amount of raw material to be treated and the amount of suspended matter. At this time, when the height of the supernatant separation pipe is adjustable, it is possible to cope with changes in the quantity of water, and it is possible to set an optimum height according to the amount of suspended substances.

In another aspect, the present invention relates to a mobile water treatment apparatus characterized in that the water treatment apparatus is mounted on a movable vehicle.

In another aspect, the present invention relates to a water treatment method using the water treatment apparatus.

In the present invention, the water treatment method comprises the steps of: (1) mixing raw water with a flocculant and supplying it to a large-capacity separation tower; (2) floating the floating material while stirring the raw water supplied in the step (1) using the impeller in the separation tower, and removing the floating suspended material; (3) supplying the treated water in the lower portion of the treated water to the inside of the non-separated water separating pipe by using a specific-diameter separating pipe in which the treated water floating on the suspended material is clogged, and separating and discharging the sediment; (4) supplying the supernatant inside the specific gravity separation pipe to the lower tower of the separation tower using an equalizing water separating pipe; And (5) discharging the treated water from the lower part of the separation tower, and recirculating part of the treated water to spray the separated water from the upper part of the separation tower, thereby reducing bubbles caused by the suspended material.

In the present invention, it is preferable to further include the step (2-1) between the steps (2) and (3) of supplying electric power to the catalyst terminal located inside the separation tower to float the non-flocculated floating material .

In the present invention, the raw water may further be subjected to a primary treatment using a hydrocyclone before the raw water is supplied.

In the present invention, the flocculant may include at least one component selected from the group consisting of calcium, potassium, magnesium, sodium, and aluminum sulfate. In the case of the coagulant, it is based on a chemical substance, which may pollute the effluent water, so additional separation equipment is necessary. However, in the present invention, the use of a coagulant composed of natural minerals reduces the risk of further contamination, and when the electrocoagulation system is used, the coagulation can be further accelerated. The natural coagulant may include 1 to 5 parts by weight of aluminum sulfate, 0.1 to 2 parts by weight of calcium, 0.1 to 4 parts by weight of potassium, and 1 to 10 parts by weight of magnesium, based on 100 parts by weight of sodium.

In the present invention, the water treatment method may further include the step of (5) after the step (6), and the step of supplying the treated water discharged from the lower part of the separation tower to the heat exchanger to recover the waste heat.

While the present invention has been particularly shown and described with reference to specific embodiments thereof, those skilled in the art will appreciate that such specific embodiments are merely preferred embodiments and that the scope of the present invention is not limited thereto will be. Accordingly, the actual scope of the present invention will be defined by the appended claims and their equivalents.

1: Tower tank
2: Specific gravity separation pipe
3: Supersonic separator
4: Float separation guide
5: Influent + flocculant supply means
6: Injection device
7: Impeller connection
8: Rotary motor
9: Treated water recirculation pump
10: sediment discharge pump
11: treated water discharge means
12: Power supply
13: catalyst terminal
14: Impeller end
15: means for discharging suspended matters
100: raw water inlet
200: low specific gravity material discharging portion
300: high specific gravity material discharge portion
310: stagnant high boiling matter around the outlet
320: Heavily charged material rising countercurrently
400: blocking means on cone type
410: diamond-shaped blocking means

Claims (21)

A water treatment apparatus having a large-capacity separation tower comprising:
(a) means for mixing the influent water and the flocculant to the top side of the upper portion of the tower tank;
(b) a cylindrical tower tank consisting of an upper layer where inflow water is treated and a lower layer in which the supernatant separated temporarily is stored;
(c) a specific-gravity separation pipe located at the center of the tower tank and having a cylindrical shape with an upper end clogged and a high-boiling substance in the tower tank at the lower end thereof fed inward;
(d) an upper portion located in the inside of the above-mentioned specific gravity separating pipe and having an opening at its upper end, and a lower end connected to a lower portion of the cylindrical tower tank to supply the upper portion of the high- Separation pipe;
(e) an impeller disposed between the specific gravity separating pipe and the cylindrical tower tank and mixing the treated water by rotation to separate the suspended material according to the specific gravity;
(f) a rotating motor located at the top of the cylindrical tower tank and connected to the impeller inside the separation tower to rotate the impeller;
(g) means for discharging the treated water separated from the upper water separation pipe, which is located on the lower side of the cylindrical tower tank;
(h) means for discharging a substance to be settled in the lower portion of the upper portion of the cylindrical tower tank, the lower portion of which is settled in the lower portion of the specific- And
(i) means for discharging suspended matter floated above the upper, upper side of the cylindrical tower tank.
The water treatment system according to claim 1, wherein the water treatment apparatus further comprises a hydrocyclone for removing suspended matters from the supplied inflow water.
3. The method of claim 2, wherein the hydrocyclone comprises:
(i) a cylindrical body whose lower portion is narrowed;
(ii) an inlet provided on one side surface of the main body;
(iii) a low-specific-gravity material outlet disposed through the upper portion of the main body;
(iv) a high-boiling material discharge port located at the lower end of the main body; And
(v) a blocking means located at the center of the high-boiling material discharge port to prevent the separated high-boiling substances from being discharged upward due to the rise of the low specific gravity material;
Wherein the water separator comprises a large-capacity separation tower.
The water treatment system according to claim 3, wherein the blocking means is a cone shape having a narrow upper portion or a diamond shape having a narrow upper portion and a lower portion.
The water treatment system according to claim 2, wherein 2 to 30 of the hydrocyclones are arranged in parallel.
The water treatment system according to claim 1, wherein the influent water is green-tide / red tide-containing water, microalgae-containing water, sewage, wastewater or shale gas runoff.
The water treatment system according to claim 1, wherein the supplying means of the step (a) is installed in a tangential direction of the cylindrical tower tank so as to rotate the supplied raw material.
The water treatment system according to claim 1, wherein the tower tank further comprises a catalyst terminal for electro-coagulation between an outer wall of the tower tank and a specific-weight separation pipe.
The water treatment system according to claim 8, wherein the catalyst terminal is a platinum catalyst.
9. The water treatment system as claimed in claim 8, wherein the catalytic terminals are installed at upper and lower portions of the specific gravity separation pipe.
The water treatment system according to claim 1, further comprising means for reducing the generation of bubbles due to suspended substances by recirculating a part of the treated water present in a lower portion of the cylindrical tower tank and spraying the recovered water on an upper portion of the tower tank Characterized in that it comprises a large-capacity separation tower.
The water treatment system according to claim 1,
(j) means for injecting treated water discharged from the separation tower into a heat exchanger to recover waste heat of the treated water;
Further comprising a large-capacity separation tower.
The water treatment system according to claim 1, wherein the water level separating pipe has a height adjusting means at an upper end thereof for adjusting the amount of water to be introduced into the water level separating pipe.
A portable water treatment apparatus according to any one of claims 1 to 13, wherein the water treatment apparatus is mounted on a movable vehicle.
A water treatment method using the water treatment apparatus according to any one of claims 1 to 13.
16. The method of claim 15,
(1) mixing the raw water with a flocculant and supplying it to a large capacity separation tower;
(2) floating the floating material while stirring the raw water supplied in the step (1) using the impeller in the separation tower, and removing the floating suspended material;
(3) supplying the treated water in the lower portion of the treated water to the inside of the non-separated water separating pipe by using a specific-diameter separating pipe in which the treated water floating on the suspended material is clogged, and separating and discharging the sediment;
(4) supplying the supernatant inside the specific gravity separation pipe to the lower tower of the separation tower using an equalizing water separating pipe; And
(5) discharging the treated water from the lower part of the separation tower, part of the treated water is recirculated and injected at the upper part of the separation tower to reduce bubbles caused by the suspended material;
Wherein the water treatment method comprises the steps of:
17. The method of claim 16, further comprising, between steps (2) and (3)
(2-1) floating the floating material by supplying electricity to the catalyst terminal located inside the separation tower;
Further comprising the steps of:
17. The water treatment method according to claim 16, wherein the raw water further comprises a primary treatment using a hydrocyclone before being fed.
delete delete 17. The method of claim 16, wherein the water treatment method further comprises, after step (5)
(6) supplying the treated water discharged from the lower part of the separation tower to the heat exchanger to recover the waste heat;
Further comprising the steps of:

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