WO2011139089A2 - Dispositif de traitement de l'eau propre et des eaux d'égout/eaux usées de type à courant descendant naturel permettant d'économiser de l'énergie - Google Patents

Dispositif de traitement de l'eau propre et des eaux d'égout/eaux usées de type à courant descendant naturel permettant d'économiser de l'énergie Download PDF

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WO2011139089A2
WO2011139089A2 PCT/KR2011/003336 KR2011003336W WO2011139089A2 WO 2011139089 A2 WO2011139089 A2 WO 2011139089A2 KR 2011003336 W KR2011003336 W KR 2011003336W WO 2011139089 A2 WO2011139089 A2 WO 2011139089A2
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Prior art keywords
water
module
mixing
type
floc
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PCT/KR2011/003336
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English (en)
Korean (ko)
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WO2011139089A9 (fr
WO2011139089A3 (fr
Inventor
김상진
왕창근
Original Assignee
주식회사 두합 크린텍
충남대 산학협력단
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Priority claimed from KR1020100042262A external-priority patent/KR100990196B1/ko
Priority claimed from KR1020100051520A external-priority patent/KR100988474B1/ko
Priority claimed from KR1020100058767A external-priority patent/KR100989889B1/ko
Application filed by 주식회사 두합 크린텍, 충남대 산학협력단 filed Critical 주식회사 두합 크린텍
Publication of WO2011139089A2 publication Critical patent/WO2011139089A2/fr
Publication of WO2011139089A3 publication Critical patent/WO2011139089A3/fr
Publication of WO2011139089A9 publication Critical patent/WO2011139089A9/fr

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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
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
    • C02F1/004—Processes for the treatment of water whereby the filtration technique is of importance using large scale industrial sized filters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D21/00—Separation of suspended solid particles from liquids by sedimentation
    • B01D21/0012—Settling tanks making use of filters, e.g. by floating layers of particulate material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D21/00—Separation of suspended solid particles from liquids by sedimentation
    • B01D21/0039—Settling tanks provided with contact surfaces, e.g. baffles, particles
    • B01D21/0045—Plurality of essentially parallel plates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D21/00—Separation of suspended solid particles from liquids by sedimentation
    • B01D21/02—Settling tanks with single outlets for the separated liquid
    • B01D21/08—Settling tanks with single outlets for the separated liquid provided with flocculating compartments
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D21/00—Separation of suspended solid particles from liquids by sedimentation
    • B01D21/28—Mechanical auxiliary equipment for acceleration of sedimentation, e.g. by vibrators or the like
    • B01D21/286—Means for gentle agitation for enhancing flocculation
    • C—CHEMISTRY; METALLURGY
    • 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
    • C02F1/5281—Installations for water purification using chemical agents
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A20/00—Water conservation; Efficient water supply; Efficient water use
    • Y02A20/152—Water filtration

Definitions

  • the present invention relates to a rapid mixing equipment (Flocculation basin), hybrid filter (Hybrid filter) for water and wastewater treatment.
  • Flocculation basin Flocculation basin
  • hybrid filter Hybrid filter
  • a coagulant is added to the admixture, and the coagulant and the water to be treated are quickly mixed under natural conditions.
  • flocculation papers the floc formed in the mixing process or the fine flocs are effectively collided under natural flow to form large flocs that are easy to settle.
  • hybrid filter papers the floc formed by precipitation and filtration is removed. Achieve the treated water quality.
  • Mixing device of the present invention is composed of a water level control rectification wall, a cartridge type flocculation chemical injection module, an orifice type rectification wall, a rain type mixing module, the cartridge type flocculation chemical injection module is a flocculation chemical storage tank and flocculation chemical injection
  • the cartridge type flocculation chemical injection module is a flocculation chemical storage tank and flocculation chemical injection
  • the orifice-type rectifying wall allows passage of the injected cohesive chemicals and the water to be intensively entered into the subsequent wet type mixing module.
  • the wet type mixing module performs a function to effectively cause collision of water flow, vortex and turbulence, and rapid stirring.
  • a floc forming system In the floc forming region, a floc forming system is constructed by selectively combining a filtration floc forming module, a vortex agitating floc forming module, an upward laminar floc forming module, and a mechanical stirring floc forming module, and the number of objects to be treated is a floc forming system.
  • the floc When passing through, the floc is formed by collision of the fine particles according to the characteristic flocculation mechanism of each floc forming module.
  • Hybrid filter enables high efficiency sedimentation and filtration and UV disinfection function. Also, it is possible to secure washing water in filter paper, wash filter media, sludge washing and discharge of sedimentation basin, and start waterproofing. It is characterized by.
  • the conventional water treatment process for supplying tap water includes rapid mixing, floculation, sedimentation, and filtration. Since microorganisms, dissolved organic and inorganic substances, colloidal microparticles, etc. present in raw water are not easily precipitated by gravity, flocculation is performed to flocculate the microparticles, and this floc is gravity precipitated or dissolved air flotation.
  • the water treatment is carried out to reduce the burden of subsequent filter paper, and then filter out residual microfloc or particulate material to meet the turbidity criteria for the application.
  • suspended solids In the sewage treatment process, suspended solids (SS) are first precipitated to facilitate subsequent biological treatment or finally to precipitate high concentrations of microbial flocs after biological treatment.
  • SS suspended solids
  • a coagulant is administered as in the standard water purification process to form dissolved phosphorus into a precipitate, and then precipitate or remove filtration.
  • biologically treated wastewater effluent is additionally filtered or aggregated, precipitated, and filtered to achieve the target water quality. Therefore, rapid mixing, floculation, sedimentation and filtration are important processes for both water treatment and sewage treatment, and various mixing, flocculation, precipitation, and filtration techniques have been developed.
  • colloidal microparticles have a negative charge on the surface, and cations are distributed around the particles to form an electrical double layer, and no floc is formed due to electrical repulsion when the particles collide with each other. Coagulation is injected to destabilize the electrical stability of these colloids or to coalesce with a plurality of electrically neutral precipitates to form a flop.
  • flocculants used for water treatment such as aluminum and iron salts
  • precipitates such as aluminum hydroxide or iron hydroxide are formed and perform a flocculation function. It is very important to be able to achieve rapid mixing with the water to be treated. If the flocculant is added immediately after mixing, that is, it is not evenly distributed throughout the treated water, the flocculation efficiency decreases.
  • the flocculant injection point and method, the type of flow of treated water, and the structure of the rapid admixture are the key factors in the design of the blend.
  • Rapid mixing methods include mechanical, water flow, and pump diffusion methods.
  • Mechanical mixing is the most commonly used mixing method in water treatment.
  • One or more mechanical mixing devices are installed in a tank or waterway.
  • the general design standard is agitation strength 300sec-1 (G value), mixing time is 10-30 seconds, power consumption is 2.24 ⁇ 2.64hp per 10,000m3 / d.
  • G value agitation strength 300sec-1
  • mixing time 10-30 seconds
  • power consumption is 2.24 ⁇ 2.64hp per 10,000m3 / d.
  • Mechanical rapid mixing is difficult to instantaneous mixing, short circuit (short circuit) occurs a lot, the mixing time is too long for the metal salt coagulant, energy consumption, as well as the failure of the rotation shaft and the gear drive often has the disadvantage.
  • the pump diffusion mixing method a predetermined amount of water and a flocculant are sprayed by using a pump and a nozzle, and mixed with the water to be treated by bumping against a baffle plate.
  • the diffusion range by the nozzle is limited, making it difficult to use in a large pipe or a large channel.
  • a pipe lattice diffusion method having multiple injection nozzles or injection nozzles is adopted, but the structure becomes very complicated. There is a drawback to dilution in pressurized water before flocculant injection.
  • the point of injecting the coagulant is structurally limited to one point or at least, and even concentration injection is not possible considering the flow rate distribution according to the position in the channel when the coagulant is injected.
  • the mixing efficiency is reduced by stirring a large amount of flow rate at once.
  • the main design factors for floculation basins that employ mechanical agitation are agitation strength and floc formation time.
  • the floculation time is usually 20 to 40 minutes, and the rotational peripheral speed of floculators such as paddles is 15 to 80 cm / sec, and the average stirring strength (G value) in the floc forming paper is 10 to It is in the range of 100 sec-1, and is usually designed and operated in a manner of dividing into 3-4 stages and gradually decreasing it downstream.
  • the first stage of the floc forming paper that is, the inlet, strong stirring is performed in order to increase the collision efficiency of the fine particles, and gentle stirring is performed in the third or fourth stage to prevent destruction of the flocs formed.
  • the average flow rate is 15 – 30 cm / sec.
  • the main design elements of gravity settling basins are the settling velocity of the floc to be settled and the settling distance from the settler, ie depth and residence time.
  • the concept of surface loading or overflow rate considering the sedimentation speed and sedimentation distance is applied.
  • the sedimentation basin may be a circular sedimentation basin, a cross flow sedimentation basin, a slope plate or an inclined tube sedimentation basin. Double cross-flow sedimentation basins and sloped sedimentation basins are directly connected to floc forming basins and are widely used for water treatment, and circular sedimentation basins are widely used in sewage treatment facilities.
  • the treated water flows into the central part of the sedimentation basin and flows outward, so the floc is broken during the transfer of the floc formed water to the center of the sedimentation basin after the flocculant required for water treatment. Because.
  • both of these precipitation methods can improve the settling efficiency by minimizing the settling distance of the flocs.
  • the effective depth of the transverse sedimentation basin in the standard water purification process is 3-4m, the residence time is 2-4 hours, and the sludge deposition depth is 30cm or more. This means that flocs can be removed by sinking up to 3 to 4 m until they have flowed into the settling basin and then out. Therefore, it is common process flow that slow settling flocs are unremoved, overflowed and subsequently removed from filter paper installed as a separate structure.
  • the sludge deposited on the bottom of the circular sedimentation or crossflow sedimentation basin is scraped in the direction of the inlet of the sedimentation basin by using various types of sludge collectors, and is discharged intermittently to the outside of the sedimentation basin using a sludge pump.
  • Types of sludge collector include traveling bridge type, chain flight type, underwater cart type, pneumatic type, conveyor type, rotary type, and peripheral driving type.
  • Inclined devices and inclined tube settler are intended to improve the sediment removal efficiency by significantly shortening the settling distance of the cross-flow sedimentation basin and increasing the settling area.
  • Inclined plate sedimentation basin can be installed in multiple stages, surface load ratio 4 ⁇ 9mm / min, inclined plate inclination angle 60 ⁇ , average flow velocity in sedimentation basin is 0.6m / min or less, inclined plate spacing 100mm or more, dwell time in sloped plate is 100 In the case of mm, it is about 20 to 40 minutes.
  • Inclined pipe sedimentation basin has an inclination angle of 60 ⁇ and an average ascent flow velocity in the sedimentation basin is 80 mm / min or less.
  • the sludge accumulated in the inclined plate or inclined tube is designed to be discharged downward by automatically sliding down by gravity using the 60 ⁇ angle of the inclined plate, and the space between the bottom of the inclined plate and the bottom of the settling basin is 1.5 m or more. It is used for sludge deposition, sludge collection facilities and sedimentation maintenance and repair. During the operation of the sedimentation basin, a barrier between the slope settling device and the floor is blocked by a storage wall to prevent short circuit and install a door for human access.
  • Granular filter media such as sand, anthracite coal, and granular activated carbon are mainly used in the rapid filter paper in the standard water purification process, and the rapid filter paper has a thickness of 60 ⁇ 70cm depending on the composition of the filter layer.
  • the lower collecting device is installed to support the filter medium and distribute water and air evenly to the whole filter paper when washing.
  • the lower collecting device is a porous block type, strainer type, perforated pipe type, Perforated plate type, wheeler type and the like.
  • the cleaning of the media is usually a combination of surface and backwashing, with air cleaning as necessary.
  • a large part of the flocs are removed intensively from the top of the media layer, especially since many flocs accumulate on the top surface of the media layer in the inflow section, using the surface cleaner mounted on the driving device above the media layer. And discharge these flocs with backwash water.
  • Backwashing passes the washing water at a flow rate of 5 to 10 times the filtration rate in the opposite direction to the flow of water through which the filtration flows. It is a process discharged with backwash water.
  • the backwashing time depends on the backwashing method and the presence or absence of air washing, but the washing time with water is about 10 minutes.
  • the amount of water required for backwashing varies, but filtered water is used for approximately one hour per day.
  • UV disinfection facilities for the disinfection of drinking water and sewage water are usually designed separately for disinfection water passages in which UV lamp modules are installed.
  • Sterilization equipment is installed in the reactor of stainless steel or waterway of reinforced concrete structure. UV irradiation time is about 4 ⁇ 14 seconds for low pressure lamps, about 1 second in the case of medium pressure lamps, the longer the contact time is advantageous to ensure the safety of disinfection.
  • the sedimentation efficiency can be improved while significantly reducing the size of the cross-flow sedimentation basin or inclined plate sedimentation basin, and washing and discharging the cross-flow sedimentation basin and inclined plate sedimentation basin with minimal washing water without installing a structurally complex sludge collector.
  • the filter media structure and washing water can be increased from tens to hundreds of times of filtration speed and the washing time can be reduced from several seconds to several tens of seconds. It is possible to easily use the treated water from the filter paper itself as washing water, and at the same time, it is easy to discharge the washed water immediately to the outside of the filter paper, and to easily perform the filter to waste function to discharge the initial filtered water after washing the filter.
  • the structure of the filter paper is needed.
  • the present invention is capable of injecting the coagulant at various points of the flowing water body, and the rectifying wall for controlling the water level, which can effectively generate the high velocity and collision of the water body, the vortex and the turbulence, and the cartridge type coagulation Chemical injection module, orifice type rectifying wall, and wet mixing module were devised.
  • the rectifying wall for water level control is installed for the purpose of controlling the level of water passing through the admixture for the change of flow rate and adjusting the flow rate and the stirring strength.
  • the cartridge type flocculation chemical injection module installs a flocculation chemical injection pipe horizontally or vertically with respect to the mixing channel and forms a plurality of holes or nozzles at a specific point of the pipe to perform an outlet function to move the flocculant to the water to be treated. By doing so, multi-point coagulant injection is performed.
  • An orifice rectifying wall is provided in the flow direction with respect to the hole or the nozzle in the forward or backward direction or in the same line, so that the treated object injected with the flocculant passes only through the open part of the orifice at a very high flow rate, as can be seen from the principle of the orifice. do.
  • the treated water and the flocculant that passed through the orifice opening part hit the unit type hybridization module designed to generate effective turbulence, and the first rapid mixing occurs, and the unit type hybridization module passes through the unit type mixing module formed in multiple stages. Allow the mix to complete in the process.
  • the present invention constructs a floc forming system by selectively combining a filtration floc forming module, a vortex agitating floc forming module, an upward laminar floc forming module, and a mechanical stirring floc forming module.
  • the floc is formed according to the characteristic floculation mechanism of each floc forming module so that the floc is formed and the required floe size can be achieved.
  • flocking has the advantage of repeating attachment and desorption of fine particles to the media, detention and release from the media pores.
  • the size of floc that can be produced is small.
  • the size of the generated floc is slightly larger, but the attachment and desorption function is reduced, so the choice of media and the thickness of the media layer are important factors.
  • the specially designed flow type stirring floc forming module it is possible to generate a change in flow velocity, vortex and agitation strength in a minimum space, thereby dramatically increasing the frequency of collision between particles and flocs.
  • the filter paper was divided into the media layer, the media layer lower space, and the media layer upper space.
  • the lower space of the filter bed is responsible for supplying the water to be treated, the settling function, the sedimentation basin washing function, the washing water and the sludge discharge function, and the filter bed is capable of performing the upflow filtration while maximizing the flow rate of the downflow while using various media. It was set as the structure which could be.
  • the treatment water is stored and discharged, securing the treated water as washing water, providing water pressure and washing flow rate during washing, starting waterproofing, securing UV disinfection time according to the residence time of the upper space, washing water quantity and UV disinfection time.
  • the selection of the heights of the treated water outlets allows for a complex function.
  • the filter paper of the present invention is a structure capable of simultaneously washing and discharging the sedimentation basin using the washing water of the filter media layer, the sludge collector (sludge collector) and the sludge discharge pump, surface cleaning, including the surface cleaning, which is necessary in the prior art sedimentation basin The drive facility was unnecessary.
  • the treatment water supply position and the washing water and sludge discharge positions are arranged in the same space.
  • Filter to waste valve was installed to facilitate filter to waste.
  • the media such as filter sponge or sponge can be placed in the filter paper by simple supporting structure with almost no head loss by using the media block.
  • the granular media can be placed on the media such as filter media with thin thickness filter sponge. It was made to structure.
  • filter paper In addition, filtration, sedimentation, and UV disinfection are possible within a single structure (filter paper), which significantly reduces land area and overall size of water and wastewater treatment facilities compared to the existing technology, and treats and washes stored in the upper space of the filter paper. This eliminates the need for a separate wash water supply system from the outside, reducing facility requirements and allowing easy installation of ultraviolet lamps in this space.
  • the filter media can be drained downward in a few seconds to several tens of seconds. It is possible to achieve the effect of effectively cleaning and discharging the sludge detained or deposited in the sedimentation basin and facilitating starting waterproofing.
  • FIG. 1 is a process diagram of a wastewater and sewage treatment apparatus having a structure that saves energy by mixing, flocculation paper, and hybrid filter paper of the present invention, and mixing, flocculation, sedimentation, and filtration are performed in a natural flow type.
  • FIG 2 is an exemplary view of the mixing device consisting of a mixing channel, cartridge type flocculation chemical injection module, orifice rectifying wall, the flow mixing module of the present invention (top view, flocculation chemical injection oil pipe is installed vertically, rain Eating module is composed of three stages)
  • FIG 3 is an exemplary view of a mixing device composed of a mixing channel, cartridge type flocculation chemical injection module, orifice type rectifying wall, the storm mixing module of the present invention (vertical cross-sectional view, flocculation chemical injection hole pipe is installed vertically,
  • the wet food mixing module consists of three stages
  • Figure 4 is an exemplary view showing the shape of the orifice rectifying wall and unit flow type mixing module and the flow of water to be treated.
  • FIG. 5 is a floc forming paper in which a filtration floc forming module, a stirrer floc forming module, an upward laminar floc forming module, and a mechanical stirring floc forming module (vertical shaft, paddle flat) are arranged vertically in one reactor. It is an illustration.
  • FIG. 6 is an explanatory view of the structure of the upflow unit flow type stirring floc forming module of the present invention and the generation of vortices and stirring in the module (polyhedron).
  • FIG. 7 is an explanatory view of the structure of the upflow unit flow type stirring floc forming module of the present invention and the generation of vortices and stirring in the module (cutting pipe type).
  • FIG. 8 is an exemplary view of the floc forming paper in which the floc forming module of the present invention is disposed in two stages adjacent to each other up and down and sideways.
  • Figure 9 is an exemplary filter paper consisting of the media layer, the media layer lower space, the media layer upper space of the present invention (in the lower layer of the media layer is a cross-flow sedimentation basin and slope plate (pipe) sedimentation basin, washing water / sludge outlet after washing; media layer)
  • the treated water is stored and discharged, the water is washed before washing, the water pressure and the cleaning flow rate are provided, and the starting drain and the ultraviolet lamp are installed.
  • FIG. 10 is an exemplary view showing a lower layer of a media layer with a multi-stage horizontal plate settler of the present invention.
  • mixing channel 2 mixing channel structure
  • Filtration floc forming module (combined by filter sponge, anthracite, microfiber, etc.)
  • media layer support structure 26 unit flow type stirring floc forming module
  • suction pump 40 multi-stage horizontal plate settling basin
  • the present invention relates to a rapid mixing equipment (Flocculation basin), hybrid filter (Hybrid filter) for water and wastewater treatment.
  • Flocculation basin Flocculation basin
  • hybrid filter Hybrid filter
  • a coagulant is added to the admixture, and the coagulant and the water to be treated are quickly mixed under natural conditions.
  • floc forming paper the floc formed in the mixing process or the fine floc effectively collides under natural flow to form a large floc that is easy to settle, and in hybrid filter paper, the floc formed through precipitation and filtration is aimed at Achieve the treated water quality.
  • the mixing apparatus will be described. As illustrated in FIGS. 1 and 2, the rectifying wall 17 for adjusting the water level, the cartridge type coagulant injection module 3, and the orifice type rectifying wall 8 are provided in the mixing channel 1 through which the treated water flows. , The mixing apparatus consisting of the wet type mixing module 10 is formed.
  • the water level control rectification wall 17 performs a function of adjusting the water level passing through the mixing device, and the cartridge type coagulant injection module 3 distributes and distributes the coagulant evenly to the cross section of the mixing channel 1.
  • Orifice-type rectification wall (8) causes a fast flow rate when the treated water injected with the flocculating chemicals pass and at the same time serves as a passage for the concentrated entry into the subsequent mixing type module (10), In the food mixture module 10, the collision of water flow, vortex and turbulence, and rapid stirring are effectively generated so that the injected flocculant and the treated water can be mixed within a few seconds.
  • the cartridge type flocculation chemical injection module 3 has a flocculation chemical storage tank 4 at the top and a flocculation chemical injection oil pipe 5 at the bottom, which are installed in the mixing channel structure 2 at the bottom.
  • Using the injection module insertion and fixing structure (7) is manufactured in a cartridge (Cartridge) type so that it can be inserted and detached by insertion.
  • the flocculating chemical is introduced into the flocculating chemical storage tank (4) located above the cartridge type flocculating chemical injection module (3) by a pump or a natural flow method from the flocculating chemical storage tank, and then the flocculating chemical injection pipe by gravity 5) and injected into the water to be treated through holes or nozzles 6 provided in the flocculant injection pipe 5.
  • the flocculating chemical injection pipe 5 located under the cartridge type flocculating chemical injection module 3 is installed vertically or horizontally with respect to the bottom surface of the mixing channel 1.
  • the horizontal or vertical length of the flocculation chemical injection pipe 5 is manufactured so that the entire pipe is submerged in the water to be treated at the minimum depth (LWL) and the maximum depth (HWL), so that evenly coagulating chemical injection is possible regardless of the water level fluctuation. Do it.
  • the size of the holes or nozzles 6 installed in the coagulant chemical injection hole pipe 5 may be different in size so that the coagulant may be injected at an equal concentration into the treated water flowing in the mixing channel 1. can do.
  • the flow rate of the fluid flowing through the irrigation canals or channels is different depending on the separation distance from the depth of the water or the wall, the flow rate is agglomerated according to the separation distance from the flocculation chemical storage tank 4 while considering the distribution of these flow rates for uniform concentration injection. This is determined by considering the difference in the discharge flow rate of the chemical.
  • FIG 2 and 3 illustrate a case in which the flocculation chemical injection pipe 5 of the cartridge type flocculation chemical injection module 3 is installed perpendicular to the flow direction of the water to be treated (top view).
  • the orifice-type rectifying wall 8 rapidly reduces the cross section through which the water to be treated flows at right angles, thereby increasing the flow velocity to the narrowed open portion and generating turbulence immediately upon passage. It is to use.
  • the rectifying wall having a plurality of orifice structures is positioned in the same line or front and rear of the hole of the coagulant injection hole 5 of the cartridge type coagulant injection module 3 or the nozzle 6, and the orifice is opened. By placing the part 9 and the hole or nozzle 6 on the same streamline, the first pass procedure for effective mixing of the water to be treated and the flocculating agent is completed.
  • the number of the open portions 9 of the orifice-type rectifying wall and the number of the coagulant supply pipes 5 are the same, and the width of the open portion of the orifice is determined according to the speed of the flow rate to be obtained when passing through the orifice. The narrower the opening, the faster the flow velocity, while the larger the head of loss. 2 and 3, an orifice-shaped rectifying wall 8 is installed perpendicular to the bottom of the mixing channel 1, and the open portion 9 of the orifice is formed perpendicular to the bottom of the mixing channel 1. The case (top view) is illustrated.
  • the wet type mixing module 10 includes one or more unit type type mixing modules 11, and as shown in FIG. 4, the unit type type mixing module 11 is the number of processing targets.
  • the inlet side is open (12) and the opposite side of the inlet side and the side surfaces (13, 14) has a wall-blocked structure.
  • STS stainless steel
  • the inflow portion 12 of the unit flow type mixing module 11 When the treated object injected with the coagulant drug passing through the open portion 9 of the orifice rectifying wall 8 flows into the inflow portion 12 of the unit flow type mixing module 11, the inflow portion is caused by a high flow rate inertia. Strongly hitting the opposite wall surface 13 forms a vortex and a turbulent flow and rapid stirring occurs after the flocculation chemicals and the water to be treated are mixed between the unit flow hybridization module (15) and the unit flow hybridization module of the next stage ( 11) Mixing is completed by repeating the flow.
  • the total residence time of the admixture in the present invention is preferably in the range of about 1 second to about 10 seconds.
  • the height 16 of the unit wet type mixing module 11 constituting the wet type mixing module 10 and the distance 15 between the adjacent unit type type mixing module 11 and the inside of the type of water mixing type module It is possible to control the flow velocity, the impact strength of the water flow, the degree of formation of vortices and turbulence, and the degree of rapid stirring.
  • the mixing duration, the degree of mixing and the total residence time are adjusted according to the number of stages (three stages in FIG. 2) in the flow direction of the processing target water of the unit storm type mixing module 11.
  • the flocculation chemical injection hole pipe may be connected to the flocculation chemical to be injected into the water to be treated.
  • the mixing method by the pressurized water diffusion method, the in-line fixed mixing method, the in-line mechanical mixing method, the pipe lattice mixing method, the partial plum, venturi limiter, weir, etc. as introduced in the background art
  • the mixing efficiency adopts the orifice-type rectifying wall 8 and the water-type mixing module 10 in addition to the mixing equipment adopting the water-flow mixing method. Only the wet type mixing module 10 may be additionally installed.
  • the hole or nozzle 6 provided in the flocculation chemical injection pipe 5 of the cartridge type flocculation chemical injection module 3 cannot completely exclude the possibility of clogging as in the prior flocculant injection method.
  • This is a natural phenomenon in which sediment particles adhere to the area where water is first contacted with the flocculant as it continuously passes through small holes.It is a periodic inspection and maintenance such as easy removal and removal of attached deposits without interruption of water treatment. You should be able to.
  • Most of the prior art has a weak point that this part is very weak, in order to improve this, install two cartridge type flocculant injection module (3) or add one cartridge type flocculant injection module and fixing structure (7). After installation, prepare the preliminary cartridge type coagulant injection module and attach the preliminary module before removing the cartridge type coagulant injection module (3). Is possible.
  • the flow rate of the water to be treated varies depending on various factors.
  • the water level passing through the admixture must be constant or adjustable, and it is inevitable that the flow rate and loss head of the admixture change.
  • the mechanical mixing device that can adjust the rotational speed of the paddles or impellers, it is almost impossible to control the agitation strength.
  • the mixing effect is known to be sufficient if the constant stirring strength (G value, 300 sec-1) or more, the stirring strength in the mixing apparatus is not controlled in most cases.
  • the water level control rectifying wall 17 is cartridge based on the lowest water level so that the water level passing through the mixing device in the lowest flow rate or the lowest water level (LWL), the highest flow rate or the highest water level (HWL) is constant or adjustable.
  • LWL lowest water level
  • HWL highest water level
  • the floc forming paper of the present invention will be described in detail with reference to FIGS. 1, 5, 6, 7, and 8.
  • the treated water flows from the mixing apparatus into a reactor for floc formation, or floculation basin.
  • the water to be treated may be directly introduced into the floculation basin without administering a flocculant.
  • the floc forming paper 18, which is the overall structure of the present invention, includes a filtration floc forming module 19, a wet stir floc forming module 20, and an upward laminar flow floc forming module 21. ), A mechanical stirring floc forming module 22 is selectively combined.
  • the floculation mechanism occurring in the floc forming module has different characteristics and is arranged in accordance with the principle of making the floc gradually larger.
  • the filter-type floc forming module 19 includes: filter sponge, sponge, sand, anthracite, granular activated carbon, artificial lightweight yarn, polyethylene pellets, ABS resin pellets, nonwoven fabric, fiber yarn, microfiber fabric, polyester cotton, cotton wool, Composed of one or two or more of a variety of media such as microfiber, multi-layered insect screen.
  • filter sponge, sponge, sand, anthracite granular activated carbon
  • artificial lightweight yarn polyethylene pellets, ABS resin pellets
  • nonwoven fabric fiber yarn
  • microfiber fabric polyester cotton
  • cotton wool Composed of one or two or more of a variety of media such as microfiber, multi-layered insect screen.
  • backwashing is performed when the water quality decreases due to breakthrough to wash the floc retained in the filter medium, and then perform filtration again.
  • the filtered floc forming module 19 of the present invention is performed.
  • the thickness of the media layer is sufficient to be about 5 to 20 cm, and in the case of upflow, the media having a small pore at the bottom of the filtration floc forming module 19 and the media having a relatively large pore at the top are combined.
  • the arrangement may increase the adhesion efficiency of the microparticles and at the same time allow a larger floc to be formed while passing upward through the filtered floc forming module 19.
  • the wet stir flock forming module 20 is composed of one or more unit wet stir flock forming modules 26. 6 and 7, the structure of the unit flow type stirring floc forming module 26 has a polyhedron shape in which the inflow side of the water to be treated is open and the opposite side of the inflow is blocked in a wall form, and the side surface is partially open.
  • the object to be treated serves as a passage that flows to the next unit flow type stirring floc forming module 26 or the next floc forming modules 21 and 22.
  • the treated object water entering the unit flow type stirring floc forming module 26 at a high flow rate at the inlet part first hits the wall and forms eddy currents, and agitation occurs in this process to cause collision between particles. After the floc is formed and exits through the side.
  • the floc forming is very effective.
  • the interval between the unit flow type stirring floc forming module 26 of the layer into which the treated water is first introduced is narrowed, and the height of the unit flow type stirring floc forming module 26 is small, and the gap is widened toward the next layer in the flow direction.
  • the actual flow rate, vortex formation degree, and agitation strength in the module of the water to be treated gradually become smaller toward the rear of the flow direction so that the generated floc is not broken as the flow progresses.
  • the upward laminar flow floc forming module 21 is a rising speed according to a difference in the size or density of the floc while the object to be flowed upward in a certain distance of the empty space in the floc forming region. It is based on the principle that the floc is large due to the collision caused by the difference. The settling velocity of particles or flocs is proportional to the mass, so the larger the floc, the faster the settling velocity. In the upward laminar flow floc forming module 21 of the present invention, the rising speed of a small floc is increased and the rising speed of a large floc is slow because it flows upward.
  • the mechanical stirring floc forming module 22 is connected to a vertical axis or a horizontal axis to a speed adjustable motor, and various types of agitators including paddles are configured vertically or horizontally. As the stirrer rotates, it induces agitation strength (G value) and collisions between particles form flocs.
  • G value agitation strength
  • the filtration floc forming module 19 will be described based on the floc forming mechanism. Since all the fine particles must pass through the pores in the media, the collision efficiency between the fine particles is excellent, but there is a limit to forming a very large floc due to the limitation of the pore size. Therefore, it is preferable to arrange the filtration floc forming module 19 at the first stage flowing from the mixed paper.
  • the stirrer-type floc forming module 20 can freely adjust the size, number, layers, and size of the floc to be formed. (Hybrid) can be used.
  • the upward laminar flow floc forming module 21 can contribute to floc formation if there is an empty space for maintaining the water level in the floc forming area. have.
  • Mechanical stirring floc forming module 22 is excellent in the collision efficiency between the particles but consumes a lot of energy, it is preferable to arrange the minimum number in the last step.
  • the mechanical stirring floc forming module 22 may be omitted in consideration of the sediment quality target and the flocculation characteristics.
  • the treated water can be precipitated or filtered as it is without administering a flocculant, but in this case, the precipitation or filtration efficiency is low, and the particulate matter is precipitated after rapid mixing while administering a flocculant in a rapid mixing tank.
  • Flocculation basin is used to make large flocs that are easy to sedimentation. Once flocs are formed, most of the large flocs are removed from the subsequent sedimentation basin and residual microflocs or particulate matter are filtered off from the subsequent filter, thereby reducing the target water quality for turbidity. Is achieved.
  • Sources of the treated water flowing into the apparatus of the present invention with filtration, sedimentation, and ultraviolet disinfection functions include raw water, rapid mixing tanks, floculation basin, sedimentation basin effluent, and the like. Select according to the quality of water and target water quality.
  • the filter paper 27 which is the overall structure of the present invention, is divided into a media layer 28, a media layer lower space 29, and a media layer upper space 30.
  • a multi-stage horizontal plate settler 40 which is formed by combining one or two or more of the filter media lower space 29, The floc in the water passes through the inclined plate settler 32, the inclined tube settler 32, and is removed.
  • the inclination angle of the multi-stage horizontal plate settler 31 is 0 degrees and the inclination angle of the inclined plate settler or the inclined tube settler is less than 60 degrees. Obviously, the greater the level, the better the sediment removal efficiency. In the conventional prior art, since the sludge deposited on the inclined plate slides down gravity and falls into the space below the inclined plate sedimentation basin, when the sludge is smaller than 60 °, there is no way to remove the sludge. However, since the present invention uses the principle of washing using the washing water, the inclination angle is not limited. However, the spacing of the inclined plate or the diameter of the inclined tube is 2 cm or more for the depth of sedimentation sludge and the minimization of head loss during washing.
  • the kind of the media which comprises the media layer 28 in this invention is not restrict
  • Filter sponge, sponge, sand, anthracite, granular activated carbon, artificial lightweight yarn, polyethylene pellets, ABS pellets, nonwoven fabric, fiber yarn, microfiber fabric, poly Media such as ester cotton, cotton wool, acrylic fibers, microfiber fibers, mesh (Mesh) can be stacked by combining one or two or more media to form a media layer.
  • Filter media such as filter sponges and sponges are formed by cutting the media into block shapes and placing them on a simple support structure 38 so that the media layer is formed.
  • the granular media such as sand and polyethylene pellets have a certain thickness on a thin filter sponge.
  • the filter medium layer 28 is installed horizontally with respect to the whole area of the filter paper 27. This is because, if there are empty spaces or gaps in addition to the media during filtration, short-circuit flows in which the water flow is diverted occur, resulting in deterioration of treated water quality. Filtration is performed while the treated water flowing through the sedimentation basin formed in the filter medium lower space 29 flows in an upflow manner, thereby additionally removing particulate matter or floc in the treated water to achieve the target water quality.
  • the thickness of the filter media layer 28 may vary depending on the type of filter media, the number of treatment targets, and the target water quality.
  • the residence time in the upper space 30 of the media layer of the treated water is determined according to the amount of treated water stored, and this residence time is the ultraviolet irradiation time by the ultraviolet lamp 35. Therefore, by adjusting the height of the treated water outlet 34, the amount of treated water storage, the amount of washing water secured, the water pressure and washing flow rate during washing, and the ultraviolet irradiation time for ultraviolet disinfection may be controlled. Temporarily deteriorating the water quality of the filtrate when filtration is resumed after washing the media. This is because a small amount of floc remaining in the filter media flows out at the beginning of the filtration upon washing.
  • a filter to waste valve 41 is installed between the upper portion of the filter bed and the treated water outlet 34, and when the starting water is required after washing, the starting drain 41 Opening and proceeding the filtration of the water to be treated, since the treated water is not discharged to the treated water outlet 34, but discharged to the starting drain, it is convenient to start the waterproof.
  • the start drain is closed after the start water is finished, the filtered water is automatically discharged to the treated water outlet 34.
  • the floc or floc lumps or sludges detained or deposited in the sedimentation basins 31, 32, and 40 formed in the median layer 28 and the lower layer 29 of the medial layer are periodically washed and discharged. And filtration function is restored.
  • a valve 36 or a water gate at the bottom or side of the lower layer of the median layer 29 and opening the valve or the gate at a high speed at the time of washing, the treated water stored in the upper layer of the median layer is naturally discharged by gravity.
  • the present invention has a structural feature that discharges all or part of the water in the filter paper 27 together with the sludge every time the filter paper is washed.
  • the valve 36 or the sluice When the valve 36 or the sluice is opened and closed at a high speed at the same time by using a control device at the time of the electric opening and closing, the fast cleaning flow rate is effectively achieved. For example, if a water body of several ten centimeters free falls, it can be drained within 1 second, but it is slower than the free fall speed due to head loss caused by media layers, valves, settling basins, and detained flocs. Downwash flow rates of ten to several hundred times are easily achieved. In addition, by adjusting the number, size, opening and closing degree of the electro-opening valve or the sluice to regulate the flow rate of the media layer of the wash water. The cleaning flow rate may be increased by attaching a high performance suction pump 39 to the valve 36 or the hydrologic gate.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Organic Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Separation Of Suspended Particles By Flocculating Agents (AREA)

Abstract

La présente invention concerne un dispositif de mélange (équipement de mélange rapide), un bassin de floculation et un bassin de filtration hybride (filtre hybride) pour le traitement d'eaux usées et l'obtention d'eau propre. Un coagulant est introduit dans le dispositif de mélange contenant les eaux usées en vue d'un traitement, pour isoler les particules colloïdales fines, les polluants dissous et le phosphore. Les eaux usées et le coagulant introduit sont rapidement mélangés dans un état de courant descendant naturel. Dans le bassin de floculation, le sédiment ou le floculat fin généré pendant le processus de mélange sont amenés à entrer en collision dans un état de courant descendant naturel, de manière à former un floculat de grande taille qui sédimente facilement. Dans le bassin de filtration hybride, le grand floculat ainsi est éliminé par sédimentation et filtration, ce qui permet d'obtenir la qualité d'eau traitée souhaitée.
PCT/KR2011/003336 2010-05-06 2011-05-04 Dispositif de traitement de l'eau propre et des eaux d'égout/eaux usées de type à courant descendant naturel permettant d'économiser de l'énergie WO2011139089A2 (fr)

Applications Claiming Priority (6)

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KR1020100042262A KR100990196B1 (ko) 2010-05-06 2010-05-06 세척과 슬러지 배출이 용이한 상수 및 하폐수 처리용 하이브리드 여과지
KR10-2010-0042262 2010-05-06
KR1020100051520A KR100988474B1 (ko) 2010-06-01 2010-06-01 상수 및 하폐수 처리용 플록형성지
KR10-2010-0051520 2010-06-01
KR1020100058767A KR100989889B1 (ko) 2010-06-21 2010-06-21 상수 및 하폐수 처리용 혼화장치
KR10-2010-0058767 2010-06-21

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US10550018B2 (en) 2015-05-04 2020-02-04 DOOSAN Heavy Industries Construction Co., LTD Media filter having nonpowered mixing and coagulation basin, and seawater desalination plant and dissolved air floatation apparatus using same
CN111362379A (zh) * 2020-03-19 2020-07-03 杨玉梅 一种自来水处理装置
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CN113402024A (zh) * 2021-05-26 2021-09-17 山东华城城建设计工程有限公司 一种污水脱氮处理装置及其工艺方法
CN113461256A (zh) * 2021-06-25 2021-10-01 天津市政工程设计研究总院有限公司 一种针对雨水资源、封闭水体水质净化的系统及方法
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US10550018B2 (en) 2015-05-04 2020-02-04 DOOSAN Heavy Industries Construction Co., LTD Media filter having nonpowered mixing and coagulation basin, and seawater desalination plant and dissolved air floatation apparatus using same
EP3090793B1 (fr) * 2015-05-04 2020-07-22 Doosan Heavy Industries & Construction Co., Ltd. Filtre de média comprenant une coagulation/floculation à plusieurs étapes
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