CN111434625A - Pressurized air flotation tank and chemical reaction tank integrated water treatment system using hydroxyl radicals and ozone - Google Patents
Pressurized air flotation tank and chemical reaction tank integrated water treatment system using hydroxyl radicals and ozone Download PDFInfo
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- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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- C02F1/24—Treatment of water, waste water, or sewage by flotation
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- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/40—Devices for separating or removing fatty or oily substances or similar floating material
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5227—Processes for facilitating the dissolution of solid flocculants in water
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- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/78—Treatment of water, waste water, or sewage by oxidation with ozone
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- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5281—Installations for water purification using chemical agents
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- C02F1/72—Treatment of water, waste water, or sewage by oxidation
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- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/78—Details relating to ozone treatment devices
- C02F2201/782—Ozone generators
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/78—Details relating to ozone treatment devices
- C02F2201/784—Diffusers or nozzles for ozonation
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/10—Solids, e.g. total solids [TS], total suspended solids [TSS] or volatile solids [VS]
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- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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- C02F2301/06—Pressure conditions
- C02F2301/066—Overpressure, high pressure
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- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/02—Odour removal or prevention of malodour
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- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/04—Disinfection
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/02—Specific form of oxidant
- C02F2305/023—Reactive oxygen species, singlet oxygen, OH radical
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Abstract
The present invention relates to a pressurized air flotation tank and agent reaction tank integrated water treatment system using hydroxyl radicals and ozone, comprising: the reagent reaction tank is used for allowing the polluted water and the condensed reagent to flow in; a pressurized air flotation tank, wherein the medicament reaction tank is integrally formed inside the pressurized air flotation tank, and hydroxyl radical water can flow into the pressurized air flotation tank and purify suspended solid substances; a hydroxyl radical generating part which is connected with the pressurized air flotation tank and provides hydroxyl radical water; a suspended solid matter discharge unit installed at an upper portion of the pressurized air floating tank, for discharging suspended solid matter to the outside; a contaminated water and chemical inflow pipe connected to the chemical reaction tank for allowing the contaminated water and the condensed chemical to flow into the chemical reaction tank; a treated water discharge pipe connected to the pressurized air flotation tank for discharging purified treated water subjected to purification treatment to the outside; and a stirring section for stirring the contaminated water and the aggregating agent with each other in the agent reaction tank.
Description
Technical Field
The present invention relates to a pressurized air flotation tank and a chemical reaction tank integrated water treatment system using hydroxyl radicals and ozone, and more particularly, to a pressurized air flotation tank and a chemical reaction tank integrated water treatment system using hydroxyl radicals and ozone, in which a chemical reaction tank into which contaminated water flows and which is coagulated into suspended solid matter by being stirred and mixed with a coagulant is integrally formed in a pressurized air flotation tank into which water containing hydroxyl radicals and ozone can flow, thereby purifying contaminated water while minimizing an installation space.
Background
As the industrial and urban industries continue to develop, environmental pollution problems have become more serious, and a large amount of sewage, wastewater, and polluted water is discharged in a very wide variety of types, so that facilities for treating the sewage, wastewater, and polluted water have become very sophisticated and treatment costs have been greatly increased.
In addition, the water quality pollutants in the sewage and wastewater that are not completely treated flow into other water sources including rivers and lakes, rivers, and seas, which results in a problem that the water quality cannot be effectively managed.
Generally, water purification processes of rivers, dams, spillways, etc. are largely classified into physical purification processes, chemical purification processes, and biological purification processes, wherein the biological purification processes are generally used because they are most environmentally friendly and economical.
As representative processes among the biological purification processes, a vegetation process, a gravel contact oxidation process, and a biofilm attachment process are included.
The vegetation process is a method of planting vegetation on a reservoir or a flood surface, and has advantages of improving landscape and removing nitrogen and phosphorus through natural vegetation, but has disadvantages of requiring a large area and conditions such as soil for vegetation growth, and being difficult to be applied when river banks are rocks or artificial structures.
In addition, the gravel contact oxidation process has advantages that it can be applied not only to a flood surface and a reservoir but also to a sewer and that it can reduce the influence on sludge by simultaneously performing biological and physical treatments, but also has disadvantages that it has low treatment efficiency, requires a separate facility for construction, has high construction costs, precipitates of deposits are generated when installed in a sewer, and loss of facilities may be caused when a flood occurs.
In addition, the conventional technologies for treating clean water, contaminated water and contaminated wastewater include physical and chemical methods such as a precipitation method, a pressurized air flotation (DAF), a filtration method, a chemical coagulation method, an oxidation treatment method, and a biological treatment method for removing various pollutants by maximizing the metabolic processes of microorganisms in a biological reaction tank in which activated sludge is stored.
In a physicochemical advanced water treatment process, a pressurized Dissolved Air Flotation (DAF) method, in which ultra-fine bubbles generated by a pressure change adhere to the surface of water pollution particles to suspend the particles, thereby easily removing the water pollution particles, can be additionally installed and used without excessively modifying the existing treatment facilities and equipment, and is therefore widely used for purification of polluted water.
The pressurized dissolved air flotation method as described above can remove not only water pollution particles but also total phosphorus (T-P) stably and efficiently, and therefore a high-pressure facility is used.
However, in order to suspend the sludge on the surface of the water pollution particles by the pressurized dissolved air flotation method, it is necessary to perform a process of injecting the polluted water into the inflow tank, and in the process of injecting the polluted water, the polluted water is injected into the inflow tank, and at the same time, ultra-fine bubbles and flocs (flocs) may be broken or the aggregated sludge may be dispersed due to drop impact or turbulence in the raw water, and thus, the polluted water may not be suspended on the upper portion of the inflow tank and sink.
The ozone oxidation process, which is a chemical purification process, is included in addition to the purification of wastewater by the pressurized dissolved air flotation method, but has a problem in that the cohesion of particles is lowered due to the oxidation force of ozone and thus more flocculant is required.
As a conventional means for solving the above-mentioned problems of the pressurized dissolved air flotation method, korean registered patent No. 10-1336613 entitled "wastewater treatment apparatus using pressurized air flotation and ozone" is included, and the above-mentioned invention provides a wastewater treatment apparatus using pressurized air flotation and ozone, comprising: the stirring unit is used for allowing the sewage and the wastewater to flow in and to be coagulated in the process of stirring with the medicament; the main body unit is used for allowing sewage and wastewater stirred by the stirring unit to flow in and storing raw water; a bubble water supply unit supplying bubble water, which is water containing bubbles, to the sewage water while the stirring unit and the main body unit are connected to each other; the spraying unit sprays mixed water formed by mixing bubble water and sewage into the main body unit; a sludge removal unit for removing sludge suspended in the mixed water on the upper part of the raw water; thus, it is possible to minimize the destruction of bubbles when sludge is removed after sewage and wastewater is flowed in and the sludge is suspended by the bubbles, and to efficiently purify organic substances, which are difficult to decompose, by oxidation of ozone.
However, the above invention using the pressurized dissolved air flotation method has a problem that a large installation space is required because an agitation unit for agitating and mixing wastewater and a chemical agent and a main unit for storing raw water need to be separately installed, and when a large amount of polluted water needs to be treated, the construction cost of civil engineering for installing a polluted water purification water treatment apparatus is greatly increased and the main unit for storing raw water cannot be elastically added because of the limitation of the installation area, so that the above solution cannot be applied to a large-scale polluted water treatment facility, and a sludge removal unit for removing sludge needs to be separately installed, so that a configuration related to a sludge removal unit having a complicated structure is required and power required for driving the sludge removal unit is further increased, further, the present invention has been made in view of the above-mentioned problems, and it is an object of the present invention to provide a method for removing sludge from a polluted water treatment facility, which can remove the sludge from the polluted water treatment facility by using a simple and inexpensive means, and which can remove the sludge from the polluted water treatment facility by using a simple and inexpensive means.
Prior art documents
Patent document
(patent document 0001) (Prior document 1) Korean registered patent No. 10-1336613
Disclosure of Invention
The present invention has been made to solve the problems of the apparatus for treating contaminated water by a pressurized dissolved air flotation method disclosed in the prior art as described above, and an object of the present invention is to provide a pressurized air flotation tank and a chemical reaction tank integrated water treatment system using hydroxyl radicals and ozone, in which a chemical reaction tank into which contaminated water flows and which is coagulated to form suspended solid matter by stirring and mixing with a coagulating chemical is integrated into a pressurized air flotation tank into which water containing hydroxyl radicals and ozone can flow, so that installation space can be significantly reduced and installation can be performed in a small space, and the number of pressurized air flotation tanks having chemical reaction tanks integrated therein can be increased flexibly even in civil engineering of water treatment facilities into which a large amount of contaminated water flows, thereby enabling application to large-scale water treatment facilities, further, since it is not necessary to separately install a sludge removing unit which is a structure for removing Suspended Solid (SS), it is possible to simplify the structure of the pressurized air floating tank and to operate with minimum power, and since the water content of the Suspended Solid (SS) which is a minimum amount of water contained when the Suspended Solid is removed is relatively low, it is possible to minimize a transfer process for repeatedly transferring the Suspended Solid in order to reduce the water content, and it is possible to effectively and elastically apply to a small-scale, medium-scale or large-scale polluted water treatment system and to expand and reduce the installation scale at a low cost.
In order to achieve the above object, the present invention provides a water treatment system integrated with a pressurized air flotation tank and a chemical reaction tank, which utilize hydroxyl radicals and ozone, comprising: a reagent reaction tank into which the contaminated water and the aggregating reagent flow and which aggregates the contaminated materials into suspended solid materials by stirring and mixing with each other and suspends the suspended solid materials on the upper part; a pressurized air flotation tank in which the chemical reaction tank is integrally formed, into which water containing hydroxyl radicals (OH radics) and ozone can flow, and which allows the suspended solid substances to be suspended at the upper portion, and which purifies, sterilizes, decomposes, deodorizes, and decolors the suspended solid substances and contaminated water; a hydroxyl radical generating unit connected to the pressurized air flotation tank for supplying hydroxyl radical water containing the hydroxyl radical and ozone to the pressurized air flotation tank; a suspended solid matter discharge unit installed at an upper portion of the pressurized air floating tank, for discharging suspended solid matter to the outside; a contaminated water and chemical inflow pipe connected to the chemical reaction tank for allowing the contaminated water and the condensed chemical to flow into the chemical reaction tank; a treated water discharge pipe connected to the pressurized air flotation tank for discharging purified treated water subjected to purification treatment to the outside; and a stirring section for stirring the contaminated water and the aggregated chemical in the chemical reaction tank, the stirring section including a reduction motor, a rotary shaft, and a rotary impeller.
Preferably, the invention is characterized in that: the hydroxyl radical generating unit includes, in order to supply hydroxyl radical water containing hydroxyl radicals, ozone, and microbubbles to the pressurized air flotation tank: an ozone generator for generating ozone; and a microbubble generator that generates microbubbles in order to contain hydroxyl radicals while storing ozone generated in the ozone generator.
Preferably, the invention is characterized in that: a floc discharge pipe for discharging flocs (flocs) which are solid contaminants and do not aggregate into suspended solids and which naturally settle and accumulate in the lower part of the chemical reaction tank to the outside is provided in the lower part of the chemical reaction tank, and a water discharge part for discharging contaminated water after a certain period of storage to the outside is provided in the lower part of the pressurized air flotation tank.
Preferably, the invention is characterized in that: a confirmation screen unit for confirming the state of the purified treated water is further provided at an end of the treated water discharge pipe.
Preferably, the invention is characterized in that: the treated water discharge pipe is branched to form a water level maintaining air suction unit for sucking outside air for adjusting an appropriate water level inside the pressurized air flotation tank, and the treated water discharge pipe and the water level maintaining air suction unit communicate with each other.
The pressurized air-floating tank and chemical reaction tank integrated water treatment system using hydroxyl radicals and ozone according to the present invention is applied to a large-scale water treatment facility construction at a very low cost by elastically increasing the number of pressurized air-floating tanks in which chemical reaction tanks are integrally formed, wherein the pressurized air-floating tanks into which water containing hydroxyl radicals and ozone is allowed to flow are integrally formed with chemical reaction tanks into which contaminated water is allowed to flow and which are coagulated to form suspended solid matter or coagulated masses by being stirred and mixed with a coagulating chemical, so that an installation space occupied by the chemical reaction tanks can be greatly reduced and thus the chemical reaction tanks can be installed in a small space, and a plurality of chemical reaction tank integrated pressurized air-floating tanks can be installed in a multi-layer structure to thereby improve the utilization efficiency of the installation space, further, since it is not necessary to provide a separate sludge removing means for removing the suspended solid matter (SS), the configuration of the pressurized air floating tank can be simplified, and the pressurized air floating tank can be operated with minimum power and maintenance can be eliminated, and since the water content of the suspended solid matter, which is the minimum amount of water contained when the suspended solid matter (SS) is removed, is significantly low, the repeated transfer process for reducing the water content of the suspended solid matter can be minimized, and the system can be effectively and flexibly applied to a small-scale, medium-scale, or large-scale contaminated water treatment system.
Drawings
Fig. 1 is a schematic view schematically showing the configuration of a water treatment system to which a conventional pressurized dissolved air float process is applied.
FIG. 2 is a schematic view schematically showing the configuration of a pressurized air flotation tank and chemical reaction tank integrated water treatment system using hydroxyl radicals and ozone to which an embodiment of the present invention is applied.
FIG. 3 is a sectional view schematically showing the inside of a pressurized floatation tank using hydroxyl radicals and ozone and a chemical reaction tank integrated water treatment system to which an embodiment of the present invention is applied.
Fig. 4 is a schematic configuration diagram schematically illustrating an example in which a plurality of pressurized air flotation tanks using hydroxyl radicals and ozone and a chemical reaction tank integrated water treatment system are arranged to which an embodiment of the present invention is applied.
Reference numerals
1: polluted water
2: agglomerated medicinal agent
3: hydroxyl radical water
4: purifying treated water
100: medicament reaction tank
110: flocculate discharge pipe
200: pressurized air flotation tank
210: drainage part
300: hydroxyl radical generating moiety
310: ozone generator
320: microbubble generator
400: discharge part for suspended solid matter
500: contaminated water and chemical inflow pipe
600: treated water discharge pipe
610: air suction part for maintaining water level
700: stirring part
710: speed reducing motor
720: rotating shaft
730: rotary impeller
800: confirming screen section
810: confirming filter screen
And SS: suspended solid matter
Detailed Description
Before the detailed description of the pressurized air flotation tank and chemical reaction tank integrated water treatment system using hydroxyl radicals and ozone according to the embodiment of the present invention is given, it should be understood that the detailed description of known components is omitted to further clarify the gist of the present invention, and when it is described that a certain component is "connected to" another component, it can be understood that the component is directly connected to the other component or that another component exists therebetween. In contrast, when a component is referred to as being "directly connected to" another component, it is to be understood that no other component is present therebetween. Other expressions for explaining the relationship between the constituent elements, that is, "between" and "directly between" or "adjacent to" and "directly adjacent to" and the like, should be interpreted in the same manner.
In the present specification, "contaminated water" refers to contaminated water that needs to be purified by a water treatment system because the water contains contaminants, "aggregating agent" refers to an agent that is added to aggregate solid particles suspended in the "contaminated water" into suspended solid substances and suspend the particles, that is, an agent that induces aggregation of the particles by eliminating electrical repulsive force between the particles, "hydroxyl radical water" refers to functional water that contains hydroxyl radicals and ozone and that contains microbubbles and that is capable of performing purification functions such as purification, sterilization, deodorization, decomposition, and decolorization of the contaminants, "purified water" refers to purified water that has been purified to a certain level of purification, that is, an intermediate water level of contamination, inside a pressurized air flotation tank, "microbubbles" refers to bubbles having a fine diameter and that contain bubbles having a size of 1 μm unit and several tens to several hundreds of μm and smaller bubbles having a size of only several tens of μm The term "fine diameter bubbles" refers to all bubbles including nano (nm) bubbles.
Next, a water treatment system integrated with a pressurized air flotation tank and a chemical reaction tank using hydroxyl radicals and ozone to which an embodiment of the present invention is applied will be described in detail with reference to the drawings.
The pressurized air floatation tank and chemical reaction tank integrated water treatment system using hydroxyl radicals and ozone, which is applicable to the embodiment of the present invention, comprises: a reagent reaction tank 100 into which the contaminated water 1 and the coagulant 2 can flow; a pressurized air flotation tank 200, in which the chemical reaction tank 100 is integrally formed, into which the hydroxyl radical water 3 flows and which purifies the suspended solid substance SS and the contaminated water 1; a hydroxyl radical generating part 300 connected to the pressurized air flotation tank 200 to supply hydroxyl radical water 3; a suspended solid substance discharge unit 400 installed at an upper portion of the pressurized air floating tank 200, for discharging suspended solid substances SS to the outside; a contaminated water and chemical inflow pipe 500 connected to the chemical reaction tank 100, for allowing the contaminated water 1 and the condensed chemical 2 to flow into the chemical reaction tank 100; a treated water discharge pipe 600 connected to the pressurized air flotation tank 200 and discharging the purified treated water 4 subjected to the purification treatment to the outside; and a stirring unit 700 for stirring the contaminated water 1 and the aggregating agent 2 with each other in the agent reaction tank 100.
The most characteristic technical configuration of the present invention is that the chemical reaction tank 100 is integrally formed with the interior of the pressurized air floating tank 200 described later, so that the required installation space can be greatly reduced, thereby solving the problems of the conventional pressurized air floating tank that the installation space is too large and the installation cost is too high because the tank is installed at a separate position adjacent to the pressurized air floating tank.
The chemical reaction tank 100 provides a space into which the contaminated water 1 as the material to be purified and the coagulant 2 for coagulating the contaminant contained therein into the suspended solid SS are introduced and stirred together, and is generally cylindrical, but the shape thereof is not particularly limited. A side hole (not shown) communicating with the contaminated water and chemical inflow pipe 500 for inducing inflow of the contaminated water 1 and the condensed chemical 2 is formed at one side of the chemical reaction tank 100, and the contaminated materials contained in the contaminated water 1 are easily accumulated at the upper portion of the pressurized air flotation tank 200 after being condensed into suspended solid materials (SS) and suspended by opening the upper portion. A stirring section 700 described later is provided inside the chemical reaction tank 100.
A floc discharge pipe 110 for discharging flocs (floc), which are solid contaminants that do not aggregate into suspended solids SS and naturally settle down and accumulate in the lower part, to the outside is provided at the lower part of the chemical reaction tank 100.
In order to aggregate the contaminants contained in the contaminated water 1 with the aggregating agent 2 to form the suspended solid substance SS, the aggregating agent composed of polyaluminum chloride, calcium hydroxide, iron oxide, iron sulfate, or the like is generally used, and the constituent substance is not limited as long as the aggregating agent has an excellent aggregating function. The amount of the aggregating agent 2 to be added may be selectively added in a specific amount in consideration of the amount of the contaminated water to be treated, the treatment time, and the like.
The pressurized air flotation tank 200 is configured to be integrated with the chemical reaction tank 100, and provides a space into which the free radical hydrogen peroxide water 3 can flow, and which purifies the contaminated water 1 by purifying, sterilizing, decomposing, deodorizing, and decoloring the suspended solid substances SS generated and suspended in the chemical reaction tank 100.
The pressurized air flotation tank 200 provides a space into which the contaminated water 1 mixed with the flocculant 2 flows from the chemical reaction tank 100 and into which the hydroxyl radical water 3 generated from the hydroxyl radical generating unit 300 described later flows to mix the contaminated water 1 and the hydroxyl radical water 3, and is generally made of a non-toxic Polyethylene (PE) material or a Fiber Reinforced Plastic (FRP) material having a cylindrical shape. The pressurized air-floating tank 200 to which the embodiment of the present invention is applied has a capacity of about 10t, and is formed of a diameter of 2.2 to 2.4m and a height of about 2.5m, and the size of the pressurized air-floating tank 200 can be flexibly applied according to the size of the installation space, the purification amount of the contaminated water as the purification object, and the treatment speed.
The pressurized air flotation tank 200 has an inverted triangular shape in its lower portion, and is provided with a drainage portion 210 for discharging the contaminated water 1 after a certain period of storage to the outside.
The hydroxyl radical generating unit 300 is connected to the pressurized air flotation tank 200, and supplies hydroxyl radical water 3 containing ozone and hydroxyl radicals and containing microbubbles to the pressurized air flotation tank 200 after generating and mixing ozone and microbubbles in order to purify the contaminated water 1 by purifying, sterilizing, decomposing, deodorizing, and decoloring suspended solid substances SS obtained by condensing the contaminants contained in the contaminated water 1 mixed with the coagulant 2 flowing into the pressurized air flotation tank 200. For this purpose, the hydroxyl radical generating part 300 includes: an ozone generator 310 for generating ozone; a microbubble generator 320 for generating microbubbles; and a flow tube.
The ozone generator 310 is connected to the pressurized air flotation tank 200 through a flow tube, generates and injects ozone into the contaminated water 1 stored in the pressurized air flotation tank 200, thereby storing hydroxyl radicals and ozone in the contaminated water 1, and then transfers the contaminated water 1 to the microbubble generator 320, and the microbubble generator 320 is connected to the pressurized air flotation tank 200 through a flow tube, receives the contaminated water 1 in which ozone is stored from the ozone generator 310, and injects microbubbles into the contaminated water 1, thereby transferring and supplying the hydroxyl radical water 3 in which microbubbles are further mixed in the contaminated water 1 in which hydroxyl radicals and ozone are stored, to the pressurized air flotation tank 200. The size of the microbubbles generated by the microbubble generator 310 to which the embodiment of the present invention is applied is 5 to 50 μm, and nano bubbles of a smaller size in the order of nanometers (nm) can be generated.
The hydroxyl radical water 3 containing hydroxyl radicals and ozone as described above can make a large amount of hydroxyl radicals, ozone and oxygen contained in the hydroxyl radical water 3 in a short time by using micro bubbles under a condition of a small ozone injection amount and thereby enhance a purification function, in particular, the sterilization function of effectively killing various bacteria and viruses such as vibrio, mold, escherichia coli, salmonella and the like harmful to human bodies, the deodorization function of inhibiting proliferating bacteria which emit foul odor due to putrefaction and oxidatively decomposing organic gas which emits foul odor, the decomposition function of removing heavy metal, phenol, chemical components and the like and decomposing harmful components which are difficult to decompose into safe substances, the decoloring function of eliminating chromaticity of sewage, excrement and urine treated water and dyeing factory wastewater by decomposing chromaticity constituent substances and improving transparency, and the like can be performed.
The hydroxyl radical water 3, which performs the above-described purification function, can purify the suspended solid matter SS suspended and accumulated in the upper portion of the pressurized air-floating tank 200 by sterilization, deodorization, decomposition, decoloration, and the like, and the contaminated water 1 contained in the pressurized air-floating tank 200, which has generated the suspended solid matter SS, is also treated to be purified water 4 purified to some extent and discharged to the outside.
The suspended solid matter discharge unit 400 is installed at the upper portion of the pressurized air floating tank 200, and is configured by a discharge pipe disposed at the upper portion of the pressurized air floating tank 200 to discharge suspended solid matter SS to the outside.
At this time, the water content of the suspended solid matter SS discharged by the suspended solid matter discharge unit 400 is significantly reduced as compared with the suspended solid matter discharged from the pressurized air flotation tank to which the conventional pressurized dissolved air flotation method is applied.
The reason why the water content of the suspended solid matter SS discharged through the pressurized air floating tank 200 to which the embodiment of the present invention is applied is remarkably lowered is that the sludge removing unit for transferring the suspended solid matter and discharging the same to the outside in the pressurized air floating tank to which the related art is applied is generally formed of a mesh belt or a scraper (scraper), and thus the suspended solid matter transferred by the scraper is discharged to the outside together with a large amount of water or stored in a storage tank, and thus the discharged or stored suspended solid matter inevitably has a high water content, but the pressurized air floating tank 200 to which the embodiment of the present invention is applied does not have a structure in which a separate sludge removing unit is provided and the chemical reaction tank 100 is integrally formed inside the pressurized air floating tank 200, and thus the suspended solid matter SS suspended to the upper portion of the pressurized air floating tank 200 is naturally discharged to the outside of the belt through the suspended solid matter discharging unit 400, the suspended solid matter SS discharged by the suspended solid matter discharge unit 400 according to the embodiment of the present invention is discharged with only a minimum amount of water, and the water content is significantly reduced.
Since the suspended solid SS applied to the embodiment of the present invention has a low water content, the water treatment system applied to the present invention does not need to repeatedly perform a transfer process of reducing the water content of the suspended solid SS by transferring the suspended solid SS into the pressurized air floating tank 200 again, that is, the efficiency of water purification treatment can be greatly improved and the water treatment time can be greatly saved compared to the conventional pressurized air floating tank system, thereby achieving the effect of increasing the water treatment capacity. In fact, by minimizing the water content of the suspended solid matter SS, the transfer amount in the embodiment to which the present invention is applied is only about 10% as compared with the conventional pressurized air flotation tank system in which the sludge removing means is separately installed, that is, the transfer amount can be greatly reduced by about 80 to 90% as compared with the conventional transfer amount.
In addition, as described above, the suspended solid SS applied to the embodiment of the present invention is naturally discharged through the suspended solid discharge unit 400 while being suspended above the pressurized air floating tank 200, and a sludge removing unit formed of a mesh belt or a scraper, which must be installed above the conventional pressurized air floating tank, is not required.
The contaminated water and chemical inflow pipe 500 is connected to the chemical reaction tank 100, and includes a pipe for inducing inflow of the contaminated water 1 and the coagulation chemical 2 and a pipe branched therefrom for inducing inflow of the coagulation chemical 2, the pipe being used for inducing inflow of the contaminated water 1 and the coagulation chemical 2, and the pipe being connected to the chemical reaction tank 100.
Although not shown, a control unit for controlling the amount and transfer pressure of the contaminated water 1 and a control unit for controlling the amount and input pressure of the aggregated chemical 2 may be installed in the contaminated water and chemical inflow pipe 500, and the control unit for controlling the amounts and pressures of the contaminated water 1 and the aggregated chemical 2 is a technical configuration that is already well known in a water treatment system, and thus a detailed description thereof will be omitted here.
The treated water discharge pipe 600 is connected to the pressurized air-flotation tank 200, and is used for discharging purified treated water 4, which has been subjected to purification treatment after removing suspended solid matter SS from the contaminated water 1 contained in the pressurized air-flotation tank 200, to the outside.
A confirmation screen unit 800 for confirming the state of the purified treated water 4 is further provided at the end of the treated water discharge pipe 600. The confirmation screen unit 800 allows an administrator to visually confirm whether the purified water 4 discharged from the pressurized air flotation tank 200 is the treated water in which the contaminants have been correctly purified or the treated water in which the contaminants are insufficiently purified, and a confirmation screen 810 is installed inside the confirmation screen unit to facilitate the administrator to visually confirm. Accordingly, the manager can determine the purification degree of the discharged purified water 4 by checking the state of the check screen 810, discharge the purified water 4 to the outside when the purification degree is good, and re-transfer the purified water 4 to the contaminated water and chemical inflow pipe 500 for transferring the contaminated water 1 and re-purify the water when the purification degree is insufficient. Therefore, a branch pipe (not shown) that can communicate with the contaminated water and chemical inflow pipe 500 is provided in the treated water discharge pipe 600.
The treated water discharge pipe 600 is branched to form a water level maintaining air suction unit 610 for sucking external air to adjust an appropriate water level inside the pressurized air floating tank 200, and the treated water discharge pipe 600 and the water level maintaining air suction unit 610 communicate with each other. Thereby, the water level inside the pressurized air-floating tank 200 can be adjusted by the operation of the water level maintaining air suction unit 610, so that the suspended solid matters SS suspended and accumulated in the upper portion of the pressurized air-floating tank 200 can be naturally discharged to the outside through the suspended solid matter discharge unit 400 without a separate sludge removal unit.
The stirring unit 700 is installed inside the chemical reaction tank 100, and is configured to stir the contaminated water 1 and the aggregating chemical 2 with each other inside the chemical reaction tank 100, and includes: a reduction motor 710 installed on the upper portion of the pressurized air flotation tank 200; a rotation shaft 720 installed inside the chemical reaction tank 100 and connected to the reduction motor 710; and a plurality of rotary impellers 730 connected to the rotary shaft 720. The stirring part 700 is a structure in which a plurality of liquid materials or solid materials are uniformly mixed with each other by stirring them, and is a structure well known in a plurality of fields, so a detailed description thereof will be omitted herein.
In the pressurized air floatation tank and chemical reaction tank integrated water treatment system using hydroxyl radicals and ozone of the present invention configured as described above, the embodiment constituted by the single pressurized air-flotation tank 200 in which the chemical reaction tank 100 is integrally formed inside is explained, but when a large-scale polluted water needs to be purified because the amount of the polluted water to be treated is large, it is possible to install a plurality of pressurized flotation tanks 200 according to the treatment amount and treatment speed of contaminated water, in this case, the treated water discharge pipe 600 of the pressurized air-floating tank 200 disposed adjacent to each other and disposed first and the contaminated water and chemical inflow pipe 500 of the pressurized air-floating tank 200 disposed next to each other are connected to each other, so that the purified polluted water continues to pass through the pressurized air flotation tank 200 configured at the back and is further purified.
In addition, when a plurality of the above-described pressurized air-flotation tanks 200 are arranged, the treatment amount and treatment rate of the contaminated water in the plurality of the pressurized air-flotation tanks 200 arranged can be adjusted by arranging separate sedimentation tanks between the pressurized air-flotation tanks 200 in consideration of the treatment amount and treatment rate of the contaminated water.
In addition, since the plurality of pressurized air-flotation tanks 200 are arranged in a multi-layer configuration such as 2 or 3 layers in order to minimize the installation space thereof, that is, since the pressurized air-flotation tank and chemical reaction tank integrated water treatment system using hydroxyl radicals and ozone according to the present invention can flexibly expand and contract the scale thereof and improve the space utilization rate thereof, the system can be installed at a lower installation cost of about 1/10 compared to a conventional pressurized Dissolved Air Flotation (DAF) water treatment system requiring separate installation of chemical reaction tanks and pressurized air-flotation tanks, thereby obtaining a very high economic effect in terms of space utilization rate and cost saving rate.
When the contaminated water is purified by the pressurized air flotation tank and chemical reaction tank integrated water treatment system using hydroxyl radicals and ozone according to the present invention configured as described above, the contaminated water 1 containing a large amount of contaminants flows into the chemical reaction tank 100 through the contaminated water and chemical inflow pipe 500 in a state of being mixed with the aggregating chemical 2, and the contaminants contained in the contaminated water 1 are aggregated into the suspended solid substance SS by interaction with the aggregating chemical 2 by the stirring part 700 installed inside the chemical reaction tank 100, and are injected into the chemical reaction tank 100 together with the contaminated water 1. When the contaminated water 1 and the suspended solid substances SS are poured into the chemical reaction tank 100 and overflow occurs, the contaminated water 1 and the suspended solid substances SS naturally flow into the large pressure air flotation tank 200, and at this time, the contaminated water 1 fills the inside of the pressure air flotation tank 200 and the suspended solid substances SS are suspended on the upper portion of the pressure air flotation tank 200.
In order to fill the contaminated water 1 into the pressurized air flotation tank 200 and suspend the suspended solid matter SS in the upper portion of the pressurized air flotation tank 200, the hydroxyl radical water 3 containing hydroxyl radicals, ozone, and microbubbles generated in the hydroxyl radical generating unit 300 flows into the pressurized air flotation tank 200 through the flow pipe of the hydroxyl radical generating unit 300.
The suspended solid matter SS and the contaminated water 1 inside the pressurized air-flotation tank 200 are physically and chemically purified by the hydroxyl radical water 3 containing hydroxyl radicals and ozone, while the suspended solid matter SS is collected at the upper portion of the pressurized air-flotation tank 200 and naturally discharged to the outside through the suspended solid matter discharge unit 400 without a separate sludge removal means, and the purified water 4 in which the contaminated water 1 is subjected to an appropriate level of purification treatment is discharged to the outside through the treated water discharge pipe 600. At this time, the degree of purification treatment of the purified treated water 4 discharged to the outside can be visually confirmed by the confirmation screen unit 800, and when the degree of purification treatment of the purified treated water 4 is good, the purified treated water is discharged to the outside, and when the degree of purification treatment is insufficient, the purified treated water is transferred to the chemical reaction tank 100 again, and the inside of the pressurized air-flotation tank 200 can be purified again.
As described above, the hydroxyl radical water 3 containing hydroxyl radicals and ozone and having its contaminated water purification function further enhanced by the microbubbles can physically and chemically purify the contaminated water 1 and the suspended solid substances and discharge the contaminated water 1 and the suspended solid substances 1 to the outside, while the solid contaminated substances, i.e., flocs, which remain in the contaminated water 1 inside the chemical reaction tank 100 without being condensed into the suspended solid substances SS and naturally precipitate and accumulate to the lower portion are discharged to the outside through the floc discharge pipe 110 at the lower portion of the chemical reaction tank 100, and the contaminated water 1 after being stored for a while in the lower portion of the pressurized air flotation tank 200 is discharged to the outside through the water discharge part 210 at the lower portion of the pressurized air flotation tank 200.
The embodiments described above are merely exemplary for helping understanding the technical gist of the present invention, and it should not be understood that the scope of the present invention is limited to the examples described above, and the present invention can be modified in various forms within the scope of the technical idea of the present invention.
Industrial applicability
The pressurized air flotation tank and chemical reaction tank integrated water treatment system using hydroxyl radicals and ozone to which the present invention is applied can be regarded as an invention having industrial applicability because the same product can be repeatedly manufactured in the manufacturing industry of water treatment systems for purifying contaminated water.
Claims (5)
1. A pressurized air floatation tank and medicament reaction tank integrated water treatment system utilizing hydroxyl radicals and ozone is characterized in that:
in a water treatment system which utilizes hydroxyl radicals and ozone and is formed by integrally forming a pressurized air floatation tank and a medicament reaction tank,
the above-mentioned pressurized air flotation tank and medicament reaction tank integrated water treatment system using hydroxyl radical and ozone comprises:
a chemical reaction tank (100) into which contaminated water (1) and an aggregating chemical (2) flow and which aggregates the contaminated materials into suspended solid materials (SS) by stirring and mixing the contaminated materials and the suspended solid materials with each other and suspends the suspended solid materials in the upper part;
a pressurized air flotation tank (200) in which the chemical reaction tank (100) is integrally formed, into which hydroxyl radical water (3) containing hydroxyl radicals and ozone is allowed to flow, and which purifies suspended solid matter (SS) and contaminated water (1) while suspending the suspended solid matter (SS) at the top;
a hydroxyl radical generating unit (300) connected to the pressurized air flotation tank (200) and configured to supply hydroxyl radical water (3) containing the hydroxyl radicals and ozone to the pressurized air flotation tank (200);
a suspended solid matter discharge unit (400) which is installed above the pressurized air flotation tank (200) and discharges suspended solid matter (SS) to the outside;
a contaminated water and chemical inflow pipe (500) connected to the chemical reaction tank (100) and configured to allow the contaminated water (1) and the aggregating chemical (2) to flow into the chemical reaction tank (100);
a treated water discharge pipe (600) connected to the pressurized air flotation tank (200) and used for discharging the purified treated water (4) to the outside; and the number of the first and second groups,
and a stirring section (700) for stirring the contaminated water (1) and the aggregating agent (2) with each other in the agent reaction tank (100).
2. The pressure floatation tank and chemical reaction tank integrated water treatment system using hydroxyl radicals and ozone according to claim 1, characterized in that:
the hydroxyl radical generating part (300) comprises: an ozone generator (310) for generating ozone; and a microbubble generator (320) that generates microbubbles in order to contain hydroxyl radicals while containing ozone generated in the ozone generator; thereby, hydroxyl radical water (3) containing hydroxyl radicals, ozone and microbubbles is supplied to the pressurized air flotation tank (200).
3. The pressure floatation tank and chemical reaction tank integrated water treatment system using hydroxyl radicals and ozone according to claim 1, characterized in that:
a floc discharge pipe (110) for discharging flocs, which are solid contaminants that do not aggregate into suspended solid matter but naturally settle and accumulate in the lower part, to the outside is provided at the lower part of the chemical reaction tank (100),
a drain part (210) for discharging the contaminated water (1) after a certain period of storage to the outside is provided below the pressurized air flotation tank (200).
4. The pressure floatation tank and chemical reaction tank integrated water treatment system using hydroxyl radicals and ozone according to claim 1, characterized in that:
a confirmation screen unit (800) for confirming the state of the purified treated water (4) is further provided at the end of the treated water discharge pipe (600).
5. The pressure floatation tank and chemical reaction tank integrated water treatment system using hydroxyl radicals and ozone according to claim 1, characterized in that:
the treated water discharge pipe (600) is branched to form a water level maintaining air suction unit (610) for sucking outside air for adjusting an appropriate water level inside the pressurized air flotation tank (200), and the treated water discharge pipe (600) and the water level maintaining air suction unit (610) are communicated with each other.
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| KR1020190005075A KR102246564B1 (en) | 2019-01-15 | 2019-01-15 | Pressurized flotation tank and chemical tank integrated water treatment system using hydroxyl radical and ozone |
| KR10-2019-0005075 | 2019-01-15 |
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| CN111434625A true CN111434625A (en) | 2020-07-21 |
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| KR20200088603A (en) | 2020-07-23 |
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