WO2018001219A1 - 多段曝气发生器及一种污水处理方法 - Google Patents

多段曝气发生器及一种污水处理方法 Download PDF

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Publication number
WO2018001219A1
WO2018001219A1 PCT/CN2017/090166 CN2017090166W WO2018001219A1 WO 2018001219 A1 WO2018001219 A1 WO 2018001219A1 CN 2017090166 W CN2017090166 W CN 2017090166W WO 2018001219 A1 WO2018001219 A1 WO 2018001219A1
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Prior art keywords
nozzle
stage aeration
sewage treatment
tubular member
generator
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PCT/CN2017/090166
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English (en)
French (fr)
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叶志青
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Priority to US16/309,425 priority Critical patent/US20190160440A1/en
Priority to JP2019520192A priority patent/JP2019518604A/ja
Priority to EP17819216.7A priority patent/EP3480170B1/en
Priority to CA3028268A priority patent/CA3028268A1/en
Priority to AU2017287380A priority patent/AU2017287380A1/en
Publication of WO2018001219A1 publication Critical patent/WO2018001219A1/zh
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/30—Injector mixers
    • B01F25/31—Injector mixers in conduits or tubes through which the main component flows
    • B01F25/312—Injector mixers in conduits or tubes through which the main component flows with Venturi elements; Details thereof
    • 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
    • C02F1/24—Treatment of water, waste water, or sewage by flotation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/20—Mixing gases with liquids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/20—Mixing gases with liquids
    • B01F23/23—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids
    • B01F23/231—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids by bubbling
    • B01F23/23105—Arrangement or manipulation of the gas bubbling devices
    • B01F23/2312—Diffusers
    • B01F23/23121—Diffusers having injection means, e.g. nozzles with circumferential outlet
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/20—Measuring; Control or regulation
    • B01F35/21—Measuring
    • B01F35/211—Measuring of the operational parameters
    • B01F35/2113—Pressure
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F7/00—Aeration of stretches of water
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/20—Mixing gases with liquids
    • B01F23/23—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids
    • B01F23/231—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids by bubbling
    • B01F23/23105—Arrangement or manipulation of the gas bubbling devices
    • B01F23/2312—Diffusers
    • B01F23/23123—Diffusers consisting of rigid porous or perforated material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/20—Mixing gases with liquids
    • B01F23/23—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids
    • B01F23/231—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids by bubbling
    • B01F23/23105—Arrangement or manipulation of the gas bubbling devices
    • B01F23/2312—Diffusers
    • B01F23/23126—Diffusers characterised by the shape of the diffuser element
    • B01F23/231265—Diffusers characterised by the shape of the diffuser element being tubes, tubular elements, cylindrical elements or set of tubes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/20—Mixing gases with liquids
    • B01F23/23—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids
    • B01F23/237—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids characterised by the physical or chemical properties of gases or vapours introduced in the liquid media
    • B01F23/2376—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids characterised by the physical or chemical properties of gases or vapours introduced in the liquid media characterised by the gas being introduced
    • B01F23/23761—Aerating, i.e. introducing oxygen containing gas in liquids
    • B01F23/237611—Air
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/30—Injector mixers
    • B01F25/31—Injector mixers in conduits or tubes through which the main component flows
    • B01F25/312—Injector mixers in conduits or tubes through which the main component flows with Venturi elements; Details thereof
    • B01F25/3125—Injector mixers in conduits or tubes through which the main component flows with Venturi elements; Details thereof characteristics of the Venturi parts
    • B01F25/31252—Nozzles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/30—Injector mixers
    • B01F25/31—Injector mixers in conduits or tubes through which the main component flows
    • B01F25/312—Injector mixers in conduits or tubes through which the main component flows with Venturi elements; Details thereof
    • B01F25/3125—Injector mixers in conduits or tubes through which the main component flows with Venturi elements; Details thereof characteristics of the Venturi parts
    • B01F25/31253—Discharge
    • B01F25/312533—Constructional characteristics of the diverging discharge conduit or barrel, e.g. with zones of changing conicity
    • C—CHEMISTRY; METALLURGY
    • 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
    • C02F2201/002—Construction details of the apparatus
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/03—Pressure
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/02—Aerobic processes
    • C02F3/12—Activated sludge processes
    • C02F3/1278—Provisions for mixing or aeration of the mixed liquor
    • C02F3/1294—"Venturi" aeration means
    • 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
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00—Technologies for wastewater treatment
    • Y02W10/10—Biological treatment of water, waste water, or sewage

Definitions

  • the invention relates to the field of sewage treatment, and more particularly to a multi-stage aeration generator and a sewage treatment method.
  • dissolved air flotation has been widely used in sewage treatment for more than a century. Fine bubbles are generated during the dissolved air flotation process. The hydrophobic particles leave the liquid where the adsorbed bubbles concentrate or filter the waste (molecules, colloids or large particles). Bubble surface waste is selectively absorbed. The separation efficiency depends mostly on the number and volume of bubbles. The other part depends on the difference in surface activity.
  • the traditional sewage treatment system has the following obvious disadvantages: First, the device takes up huge space and greatly improves production. Cost and operating cost; Second, the output (bubble density and flow rate) can not immediately react to the input parameters (supply and pump speed), lacking the flexibility of production. Therefore, a multi-stage aeration occurrence to solve the above problems is proposed. It is really necessary.
  • the present invention is directed to overcoming at least one of the deficiencies (deficiencies) described above in the prior art.
  • a multi-stage aeration generator comprising a generator body, a pressure monitoring device mounted on the generator body and a venturi nozzle, further comprising: a capillary conduit and a concentric tube, the capillary conduit being connected at one end to the venturi nozzle, and the other end Connected to the concentric tube, the device is novel in design, and the combination of the venturi nozzle and the concentric tube can provide a very fine foam that is continuous and stable, and can immediately make an output change for the input operation parameter change; The pump speed is given to produce the appropriate foam density and size for subsequent processing.
  • the venturi nozzle comprises a nozzle body, a nozzle front end inlet device and a nozzle rear end outlet device, the nozzle body is connected at one end to the nozzle front end inlet device, the other end is connected to the nozzle rear end outlet device, and the venturi nozzle is used.
  • the reasonable geometric surface parameters are designed to form a large flow of water circulation and have injection holes to prevent clogging.
  • the concentric tube comprises an inner tubular member, an embryo body and an outer tubular member, the embryo body is connected at one end to the inner tubular member, and the other end is connected to the outer tubular member, and one tube is in another during sintering by the preparation process.
  • the method of radially contracting the tube produces a tubular body such that the article has properties that vary in the radial direction.
  • the inner tubular member is further provided with a plurality of concentric layers.
  • the pressure monitoring device includes a pressure sensor and a pressure display device, the pressure sensor is electrically connected to the pressure display device, and the pressure sensor can sense pressure data formed by the fluid in the device and feed it back to the pressure display. In the display device, the operator is reminded to pay attention.
  • a flow monitoring device is disposed on the concentric tube.
  • the air enters the dissolving pump and is mixed with the wastewater
  • the mixed wastewater is aerated with air to produce a mixture of microbubbles and wastewater;
  • the mixed solution is dispersed into a flotation tank for filtration and sewage treatment.
  • the mixed wastewater of step S2 enters the multi-stage aeration generator, and the multi-stage aeration generator may be a combination of a plurality of venturi nozzles and concentric tubes connected in series, and the microbubbles are extracted by multiple aerations. And repeated bubble shearing, resulting in the mixing of microbubbles and wastewater liquid to form a white solution.
  • the white solution formed by mixing the microbubbles and the waste water liquid first passes through a spraying device, and the spraying device is provided with a valve, which can eliminate excessive rapid water flow.
  • a separation chamber is disposed in the middle of the spraying device, as the undissolved gas is released, and the top venting pipe of the separation chamber discharges excess suspended gas and undissolved air bubbles to avoid affecting the interception quality.
  • the multi-stage aeration generator disclosed in the present invention has a novel design, and the combination of a venturi nozzle and a concentric tube can provide a very fine foam which is continuous and stable, and can be immediately made for the change of the input operating parameters. Output changes; used to regulate air feed and pump speed to produce proper foam density and size for subsequent processing.
  • the venturi nozzle is designed by using reasonable geometrical surface parameters, can form a large flow of water circulation, and has an injection hole for preventing clogging.
  • the multi-stage aeration generator disclosed in the invention has a simple structure and convenient maintenance.
  • the multi-stage aeration generator disclosed by the invention has low production cost and is suitable for mass production.
  • Figure 1 is a schematic view showing the external structure of a multi-stage aeration generator in the present invention.
  • 1 is a generator body
  • 2 is a pressure monitoring device
  • 3 is a venturi nozzle
  • 4 is a capillary conduit
  • 5 is a concentric tube.
  • connection should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. The internal communication between the two components can be said.
  • connection should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. The internal communication between the two components can be said.
  • the specific meanings of the above terms in the present invention can be understood by those skilled in the art.
  • the technical solutions of the present invention will be further described below with reference to the accompanying drawings and embodiments.
  • a multi-stage aeration generator includes a generator body 1, a pressure monitoring device 2 and a venturi nozzle 3 mounted on the generator body, and further includes: a capillary conduit 4 and a concentric tube 5, a capillary conduit One end is connected to the venturi nozzle and the other end is connected to the concentric tube.
  • the device is novel in design. The combination of the venturi nozzle and the concentric tube provides a continuous and stable very fine foam, and can be used immediately for the input operation parameters.
  • venturi nozzle includes nozzle body, nozzle front end inlet device and nozzle rear end outlet device, nozzle body end The nozzle front end inlet device is connected, and the other end is connected with the nozzle rear end outlet device.
  • the venturi nozzle is designed with reasonable geometric curved surface parameters, can form a large flow of water circulation, and has an injection hole for preventing clogging.
  • the concentric tube comprises an inner tubular member, an embryo body and an outer tubular member, one end of the embryo body is connected to the inner tubular member, and the other end is connected to the outer tubular member, and is prepared by radially shrinking one tube on the other tube during sintering of the preparation process.
  • the tubular body is such that the article has a radially varying property, and the inner tubular member is further provided with a plurality of concentric layers, the pressure monitoring device comprises a pressure sensor and a pressure display device, the pressure sensor is electrically connected with the pressure display device, and the pressure sensor can sense the device.
  • the pressure data formed by the fluid is fed back to the pressure display device to alert the operator to the flow monitoring device on the concentric tube.
  • the device provides a very fine foam that is continuous and stable. The most important result is that output changes can be made immediately for changes in input operating parameters; used to regulate air feed and pump speed to produce appropriate foam density and size for subsequent processing, when air is mixed with wastewater
  • the inner section of the pump is vaporized to saturation before entering the venturi nozzle and the concentric tube.
  • the invention provides a sewage treatment method comprising the following steps:
  • the air enters the dissolving pump and mixes with the wastewater.
  • the sewage treatment method of the present invention includes an air dissolving pump, and the air is directly directly entrained into the wastewater stream through the intake manifold of the pump.
  • the air and wastewater compound is compressed to a design pressure of 10 bar, which ensures that the air can be fully dissolved into the mixed liquid at a soluble ratio (according to Henry's law), adjusted to change the amount of intake air and the speed at which the air dissolves the pump, thereby obtaining the desired of The size of the foam and the concentration of the air foam.
  • the speed of the pump is kept constant, the increase in intake air relative to the foam size will also be large.
  • the conventional dissolved air float system can only be used for aeration under specific air and wastewater pressure settings.
  • the mixed waste water enters the multi-stage aeration generator of claims 1-6 to produce a mixture of microbubbles and waste water to form a white solution.
  • the waste water is mixed into the aeration generator coupled to the venturi nozzle and the concentric tube, wherein the cross-sectional area of the concentric tube is close to the inlet of the venturi nozzle, in which case the pressure can be restored.
  • the first venturi nozzle is combined with the concentric tube outlet and the second venturi nozzle is connected to the concentric tube inlet.
  • a plurality of venturi tubes and concentric tubes form a multi-stage aeration generator. Microbubbles through multiple aeration extraction and repeated bubble shearing include the following steps:
  • the present invention can conveniently remove hydrophobic and hydrophilic pollutants from the wastewater, and has 30% of the startup equipment and operating cost compared with the conventional air dissolution flotation. And 40% reduction.
  • the size of the foam is generally reduced from 10-50 um to 1-10 um, and the air solubility is increased from 12% (according to Herny's law) to 15-25% by volume/volume, and the operating liquid temperature can be as high as 45 degrees.
  • the white solution is dispersed into a flotation cell for filtration and sewage treatment.
  • the output of the multi-stage aeration generator is piped to the spray device.
  • the microbubbles and the wastewater liquid are mixed to form a white solution, which is dispersed into a flotation tank for filtration and sewage treatment.
  • the spray device has no valve device and can eliminate excessive turbulent water flow.
  • a separation chamber is arranged in the middle of the spraying device, designed to release undissolved gas, and the top venting pipe of the separation chamber discharges excess suspended gas and undissolved air bubbles to avoid affecting the interception quality.
  • the spray device consists of upper and lower metal discs that are bolted together with an adjustable air space between them. Gap, in order to accurately adjust the dispersion flow rate in order to synchronize with the flotation cell and desilter design.
  • the spray device is an engineering design with the following two functions:
  • the "White Water Flow” is discharged from the bottom up and temporarily held in the central chamber (formed by the upper and lower retaining rings).
  • the "white influent” is slowly dispersed to the flotation cell in all respects.
  • the gap in the center of the disc traps the undissolved air and then overflows through the vent tube at the top.

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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)
  • Physical Water Treatments (AREA)
  • Accessories For Mixers (AREA)

Abstract

一种多段曝气发生器，包括发生器本体(1)，安装在发生器本体(1)上的压力监察装置(2)和文丘里喷嘴(3)，还包括：毛细导管(4)与同心管(5)，毛细导管(4)一端与文丘里喷嘴(3)连接，另一端与同心管(5)连接。采用该多段曝气发生器处理污水的方法。

Description

多段曝气发生器及一种污水处理方法 技术领域
本发明涉及污水处理领域，更具体地，涉及一种多段曝气发生器及一种污水处理方法。
背景技术
目前，近一个多世纪以来，溶气浮(DAF)选被广泛应用于污水处理。溶气浮选过程会产生细气泡。疏水微粒离开液体，其中吸附气泡集中或过滤废料(分子，胶体或大微粒)。气泡表面废物被有选择吸收，分离效率绝大部分取决于气泡的数量和体积，另外一部分取决于表面活性差异，传统的污水处理系统有着以下明显缺点：一、装置占用空间巨大，大大提高了生产成本以及运营成本；二、输出(气泡密度和流速)不能够即時对自输入参数(供气和泵速)进行反应，缺乏生产的灵活性，因此，提出一种解决上述问题的多段曝气发生器实为必要。
发明内容
本发明旨在克服上述现有技术所述的至少一种缺陷(不足)。
本发明的首要目的是提供一种多段曝气发生器，技术方案如下：
一种多段曝气发生器，包括发生器本体，安装在发生器本体上的压力监察装置和文丘里喷嘴，还包括：毛细导管与同心管，所述毛细导管一端与文丘里喷嘴连接，另一端与同心管连接，该装置设计新颖，文丘里喷嘴与同心管的组合，能够提供持续和稳定的非常细微的泡沫，同时可以对于输入运作参数之更动立即做出输出变动；用來调控空气进给和泵速度，以产生适当的泡沫密度和尺寸以用于后续处理。
进一步的，所述文丘里喷嘴包括喷嘴本体，喷嘴前端进口装置与喷嘴后端出口装置，所述喷嘴本体一端与喷嘴前端进口装置连接，另一端与喷嘴后端出口装置连接，文丘里喷嘴采用用合理的几何曲面参数设计而成，能形成大流量的水循环，且具有防止堵塞的喷射孔。
更进一步的，所述同心管包括内部管状构件、胚体与外部管状构件，所述胚体一端与内部管状构件连接，另一端与外部管状构件连接，通过制备过程的烧结时一个管在另一个管上径向收缩的方法制备管状体，使得物件具有在径向变化的性能。
更进一步的，所述内部管状构件上还设有多层同心层。
进一步的，所述压力监察装置包括压力传感器与压力显示装置，所述压力传感器与压力显示装置电连接，压力传感器能感应装置中流体形成的压力数据，并将其反馈到压力显 示装置中，提醒操作者注意。
更进一步的，所述同心管上设有流量监控装置。
本发明的又一目的是提供一种污水处理方法，包括以下步骤：
S1.空气进入溶解泵与废水混合；
S2.混合的废水空气曝气，产生微气泡和废水液体混合；
S3.混合的溶液分散到浮选槽进行过滤和污水处理。
进一步的，步骤S2混合的废水空气进入上述的多段曝气发生器，多段曝气发生器可以为一个或者串联在一起的多个文丘里喷嘴与同心管的组合，微气泡通过多次曝气提取和重复的气泡剪切，产生微气泡和废水液体混合形成白色溶液。
进一步的，步骤S3白色溶液分散到浮选槽进行过滤和污水处理前，微气泡和废水液体混合形成的白色溶液先经过喷洒装置，所述喷洒装置设有阀门，可以消除过多湍急水流。
更进一步的，所述喷洒装置中间设置有分离室，作为释放未溶解之气，分离室之顶部放气管排放过量悬浮气体以及未溶解气泡，避免影响截留質量。
与现有技术相比，本发明技术方案的有益效果是：
(1)本发明公开的多段曝气发生器，该装置设计新颖，文丘里喷嘴与同心管的组合，能够提供持续和稳定的非常细微的泡沫，同时可以对于输入运作参数之更动立即做出输出变动；用來调控空气进给和泵速度，以产生适当的泡沫密度和尺寸以用于后续处理。
(2)本发明公开的多段曝气发生器，文丘里喷嘴采用用合理的几何曲面参数设计而成，能形成大流量的水循环，且具有防止堵塞的喷射孔。
(3)本发明公开的多段曝气发生器，结构简单，维修方便。
(4)本发明公开的多段曝气发生器，生产成本低廉，适合大量生产。
附图说明
图1是本发明中多段曝气发生器的外部结构示意图。
图1中，1为发生器本体、2为压力监察装置、3为文丘里喷嘴、4为毛细导管、5为同心管。
具体实施方式
附图仅用于示例性说明，不能理解为对本专利的限制；为了更好说明本实施例，附图某些部件会有省略、放大或缩小，并不代表实际产品的尺寸；对于本领域技术人员来说，附图中某些公知结构及其说明可能省略是可以理解的。
在本发明的描述中，需要说明的是，除非另有明确的规定和限定，术语“安装”、“连 接”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或一体地连接；可以是机械连接，也可以是电连接；可以是直接相连，也可以是通过中间媒介间接连接，可以说两个元件内部的连通。对于本领域的普通技术人员而言，可以具体情况理解上述术语在本发明的具体含义。下面结合附图和实施例对本发明的技术方案做进一步的说明。
如图1所示，一种多段曝气发生器，包括发生器本体1，安装在发生器本体上的压力监察装置2和文丘里喷嘴3，还包括：毛细导管4与同心管5，毛细导管一端与文丘里喷嘴连接，另一端与同心管连接，该装置设计新颖，文丘里喷嘴与同心管的组合，能够提供持续和稳定的非常细微的泡沫，同时可以对于输入运作参数之更动立即做出输出变动；用來调控空气进给和泵速度，以产生适当的泡沫密度和尺寸以用于后续处理，文丘里喷嘴包括喷嘴本体，喷嘴前端进口装置与喷嘴后端出口装置，喷嘴本体一端与喷嘴前端进口装置连接，另一端与喷嘴后端出口装置连接，文丘里喷嘴采用合理的几何曲面参数设计而成，能形成大流量的水循环，且具有防止堵塞的喷射孔。同心管包括内部管状构件、胚体与外部管状构件，胚体一端与内部管状构件连接，另一端与外部管状构件连接，通过制备过程的烧结时一个管在另一个管上径向收缩的方法制备管状体，使得物件具有在径向变化的性能，内部管状构件上还设有多层同心层，压力监察装置包括压力传感器与压力显示装置，压力传感器与压力显示装置电连接，压力传感器能感应装置中流体形成的压力数据，并将其反馈到压力显示装置中，提醒操作者注意，同心管上设有流量监控装置。该装置可以提供持续和稳定的非常细微的泡沫。其中最重要成果是，可以对于输入运作参数之更动立即做出输出变动；用來调控空气进给和泵速度，以产生适当的泡沫密度和尺寸以用于后续处理，当空气与废水混合沿着泵内截面，被气化至饱和时，进入文丘里喷嘴与同心管组合前，此时根据Henry定律下，在特定液压力下可释溶气在这点形成“气相水相平衡”。然而，大部分未溶解的空气以相对大泡沫混合的形式被搅动，基於文丘里喷嘴入口和出口之间的压力差别，已溶解在液体之空气按Henry定律下，第一批小泡沫从饱气化中“凝结”以形成气体泡沫。在此阶段，被提取小泡沫，并同(未溶解且搅动后的空气所形成的)大泡沫相融合，得以制备出既稳定又非常细微的泡沫。
本发明提供一种污水处理方法，包括以下步骤：
1.空气进入溶解泵与废水混合。
本发明的污水处理方法包括空气溶解泵，空气通过泵的进气总管直接直接夹带入废水流。空气与废水合物被压缩至设计压力10bar，其中确保空气能在可溶比下(根据Henry定律)充分进溶解入混合液体，调节以改变进气量及空气溶解泵的速度，从而获得在期望的 泡沫大小尺寸和气泡沫之浓度。一般情况下，当泵的速度保持恒定时，当进气增加相对泡沫尺寸亦会较大。同样，通过在持恒的进气速度下，调高泵的速度，我们可以观测到泡沫尺寸也会减小，而传统的溶气浮系统只在特定的空气和废水压设置下才能发挥曝气功能。
2.混合的废水空气进入权利要求1-6所述的多段曝气发生器，产生微气泡和废水液体混合形成白色溶液。
废水空气混合递入文丘里喷嘴与同心管耦合之曝气发生器，其中，同心管之截面面积是与文丘里喷嘴之入口接近，在这种情况下压力可以恢复。第一个文丘里喷嘴与同心管组合的出口和第二个文丘里喷嘴与同心管入口连接。多个文丘里管和同心管组成多段曝气发生器。微气泡通过多次曝气提取和重复之气泡剪切包括以下步骤：
(1)首先，空气与废水混合沿着泵内截面，被气化至饱和，当进入第一个文丘里喷嘴与同心管组合前，此时根据Henry定律，在特定液压力下可释溶气在这点形成“气相水相平衡”。大部分未溶解的空气以相对大泡沫混合的形式被搅动。
(2)基於文丘里喷嘴入口和出口之间的压力差别，已溶解在液体之空气按Henry定律下，第一批小泡沫从饱气化中“凝结”以形成气体泡沫。在此阶段，被提取小泡沫，并同(未溶解且搅动后的空气所形成的)大泡沫相融合。
(3)此时的同心管总横切面与“(1)”等同，所以液体之压力得以恢复，由于大泡沫之表面张力比微泡弱，因此大泡首先打被破裂，并且空气首先反溶解。
(4)同心管的总横切面同“(3)”保持平衡状态，在设计时两个实心管壁之间的内部距离，可给予足够的湍流剪切力以缩减小微气泡沫体积。
(5)重复“(2)”至“(4)”过程，直至产生”怀特水流”为止。
相较于传统溶气浮选，本发明可以方便地从废水中移除疏水的和亲水的污染物，并且在启动设备和营运成本上与传统型空气溶解浮选相比，分别有30％和40％减少。另外，泡沫的尺寸从通常从10-50um减小至1-10um，并且空气溶解度从12％(根据Herny定律)提高到15-25％体积/体积，营运液体温度可高至45度。
3.白色溶液分散到浮选槽进行过滤和污水处理。
多段曝气发生器之输出是通过管道输送到喷洒装置。其中微气泡和废水液体混合形成白色溶液，分散到浮选槽进行过滤和污水处理。喷洒装置是没有阀门装置，可以消除过多湍急水流。在喷洒装置中间装备有分离室，设计作为释放未溶解之气，分离室之顶部放气管排放过量悬浮气体以及未溶解气泡，避免影响截留質量。
喷洒装置包括上部和下部的金属圆盘，这两个圆盘被栓在一起，之间留有可调节的空 隙，以便精准地调节分散流动速率以便于同浮选池和脱泥机设计相同步。喷洒装置是一个种工程设计，具有以下两个功能：
a.将“怀特水流”平均地分散至浮选池，
b.提取并从“怀特水流”中排出未溶解的空气。这两种具体化的目的都是将(由空气泡沫悬浮速度而形成)聚集滞留破坏最小化。
“怀特水流”从下往上排出，暂时保持在(由上部和下部保留环所形成的)中央室内。“白色流入液”在所有方面被慢慢地分散至浮选槽。圆盘中央的空隙将未溶解空气困住，然后通过位于顶部的通气管溢出。
图中，描述位置关系仅用于示例性说明，不能理解为对本专利的限制；显然，本发明的上述实施例仅仅是为清楚地说明本发明所作的举例，而并非是对本发明的实施方式的限定。对于所属领域的普通技术人员来说，在上述说明的基础上还可以做出其它不同形式的变化或变动。这里无需也无法对所有的实施方式予以穷举。凡在本发明的精神和原则之内所作的任何修改、等同替换和改进等，均应包含在本发明权利要求的保护范围之内。

Claims (10)

  1. 一种多段曝气发生器，包括发生器本体，安装在发生器本体上的压力监察装置和文丘里喷嘴，其特征在于，还包括：毛细导管与同心管，所述毛细导管一端与文丘里喷嘴连接，另一端与同心管连接。
  2. 根据权利要求1所述的多段曝气发生器，其特征在于，所述文丘里喷嘴包括喷嘴本体，喷嘴前端进口装置与喷嘴后端出口装置，所述喷嘴本体一端与喷嘴前端进口装置连接，另一端与喷嘴后端出口装置连接。
  3. 根据权利要求1所述的多段曝气发生器，其特征在于，所述同心管包括内部管状构件、胚体与外部管状构件，所述胚体一端与内部管状构件连接，另一端与外部管状构件连接。
  4. 根据权利要求3所述的多段曝气发生器，其特征在于，所述内部管状构件上还设有多层同心层。
  5. 根据权利要求1所述的多段曝气发生器，其特征在于，所述压力监察装置包括压力传感器与压力显示装置，所述压力传感器与压力显示装置电连接。
  6. 根据权利要求1所述的多段曝气发生器，其特征在于，所述同心管上设有流量监控装置。
  7. 一种污水处理方法，包括以下步骤：
    S1.空气进入溶解泵与废水混合；
    S2.混合的废水空气曝气，产生微气泡和废水液体混合；
    S3.混合的溶液分散到浮选槽进行过滤和污水处理。
  8. 根据权利要求7所述的污水处理方法，步骤S2混合的废水空气进入权利要求1-6所述的多段曝气发生器，微气泡通过若干次曝气提取和重复的气泡剪切，产生微气泡和废水液体混合形成白色溶液。
  9. 根据权利要求7所述的污水处理方法，步骤S3混合的溶液分散到浮选槽进行过滤和污水处理前，微气泡和废水液体混合形成的白色溶液先经过喷洒装置，所述喷洒装置设有阀门，可以消除过多湍急水流。
  10. 根据权利要求9所述的污水处理方法，所述喷洒装置中间设置有分离室，作为释放未溶解之气，分离室的顶部放气管排放过量悬浮气体以及未溶解气泡，避免影响截留质量。
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