CN1970470A - Inner aeration type aeration method and device - Google Patents
Inner aeration type aeration method and device Download PDFInfo
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- CN1970470A CN1970470A CNA2005100221522A CN200510022152A CN1970470A CN 1970470 A CN1970470 A CN 1970470A CN A2005100221522 A CNA2005100221522 A CN A2005100221522A CN 200510022152 A CN200510022152 A CN 200510022152A CN 1970470 A CN1970470 A CN 1970470A
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- 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
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Abstract
The invention discloses an internal-aeration typed aerating method and device, which comprises the following parts: sealed case, aerating film pipe with specific selective permeability in the case cavity, inlet pipe on the case lid board, pressure display control system and inlet water distributing control system in connection with film pipe, wherein the waste water flows in the aerating film pipe, which fills aeration gas toward case to reach certain pressure; the aeration gas utilizes pressure difference in and out of film pipe to distribute aeration gas in the fluid effluent evenly at micro-bubble pattern, which contacts gas and liquid two-phase completely; the aeration film pipe is paralleled over two layers according to water quantity.
Description
(1) technical field:
The present invention relates to aeration method and equipment, particularly a kind of inner aeration type aeration method and realize the device of this method.
(2) background technology:
Aeration is that gases such as ozone, oxygen or air are forced to be dissolved into process in the water body, and purpose is to increase gas solubleness in liquid, reaches to quicken physics and chemistry or biochemical treatment purpose.Traditional aerating apparatus kind is a lot, pure oxygen is arranged---micropore gas distribution aerating system, pure oxygen---flow-mixing oxygen-enriching aerating system, gas blower---micropore gas distribution pipe aerating system, the air-breathing pulling flow type aerator of impeller, jet-flow aeration equipment etc. under water, though these aerating apparatuss have all been brought into play bigger effect owing to be the formula Open architecture that directly exposes to the sun, generally be with gas distribution in liquid, gas outwards dissolving is diffused in the liquid, so energy consumption is big, the cost height, the utilization ratio of ozone or oxygen is not high, aeration efficient is lower, also can cause atmospheric pollution sometimes.
(3) summary of the invention:
The objective of the invention is to disclose a kind of aeration efficient height for overcoming the deficiencies in the prior art, energy consumption is little, can polluted air, easy to operate, be convenient to the inner aeration type aeration method and the device of control automatically.
Inner aeration type aeration method of the present invention is meant that liquid flows in gas, gas is by the method for dissolving diffusion around the liquid in liquid, its technical scheme that adopts is: with waste water and gas respectively through the inner aeration type aeration device, the external and internal pressure of the aeration film pipe in the use device is poor, make aeration gas pass through the tube wall micropore in the mode of microbubble, be distributed in equably in the fluxion in the tube chamber, reach gas, the abundant contact aeration of liquid two-phase, can again water liquid be introduced in the former active sludge pond behind the aeration and use.This method comprises the steps:
(1), guiding waste water or need the flow through aeration film pipe of inner aeration type aeration device of water aeration liquid;
(2), in the seal casinghousing of inner aeration type aeration device, inflate, adding the pressure of gas should be greater than the interfacial tension of liquid in the aeration membrane tube wall hole;
(3) adjust waste water flow velocity and gaseous tension, to obtain different dissolved oxygen concentrations;
(4) the water liquid of aeration being crossed is introduced in the former active sludge pond.
The calculation formula that adds the pressure of gas in the described method steps (2) is: Ps=2 γ/R
Wherein, Ps is a minimum working pressure power; γ is a surface tension, and generally the tension force of water is 0.07214N/m in (25 ℃) liquid-gas interface; R is a film pore crack radius, and unit is μ m.Be the computation process of a concrete aeration film pipe below:
1. by the void distribution of this film pipe section of microscopic examination, measure the internal diameter of hole.
2. calculate the pairing additional pressure value of each internal diameter according to the additional pressure formula.
Table 1 experimental film pore crack internal diameter (2R) and corresponding additional pressure value
| 2R(μm) Ps(KPa) | 230 | 550 | 200 | 150 | 130 | 200 | 120 | 250 | 140 | 280 | 120 | 210 |
| 1.25 | 0.52 | 1.44 | 1.92 | 2.22 | 1.44 | 2.40 | 1.15 | 2.06 | 1.03 | 2.40 | 1.37 | |
| 2R(μm) Ps(KPa) | 170 | 180 | 300 | 160 | 200 | 220 | 200 | 140 | 200 | 150 | 300 | 200 |
| 1.70 | 1.60 | 0.96 | 1.80 | 1.44 | 1.31 | 1.44 | 2.06 | 1.44 | 1.92 | 0.96 | 1.44 |
According to table 1 as can be known, this experimental film pipe micropore internal diameter is 550 μ m to the maximum, and minimum is 120 μ m, and scope mainly is distributed between 120～300 μ m, and the frequency of occurrences more be 200 μ m; Maximum corresponding additional pressure value is 2.40KPa, and minimum value is 0.52KPa, mostly is distributed in 0.96～2.40KPa scope, and that the frequency of occurrences is more is 1.44KPa.The big more additional pressure of the internal diameter of hole is more little.Extrapolating the required pressure of total surface tension force that uses the minimum aero operating pressure of this aeration film pipe promptly to overcome liquid in these micropores in view of the above should be greater than 0.96KPa.
Be used to realize that the device of inner aeration type aeration method is the inner aeration type aeration device, mainly form by seal casinghousing, aeration film pipe, water inlet cloth water control system, inlet pipe, the display control program of calming the anger.The housing of sealing is divided into pressure chamber and underpressure chamber, lay aeration film pipe in it, the two ends of aeration film pipe is passed housing and is communicated with the water inlet pipe and the rising pipe of water inlet cloth water control system, the cover plate of housing is provided with the inlet pipe that is communicated with the housing inner chamber and the display control program of calming the anger, pressure chamber, bottom, underpressure chamber at housing respectively are provided with an outage, discharge the liquid that leaks into two Room during for maintenance.
Described seal casinghousing is an air tight enclosure, which is provided with housing-plate, and inner chamber is divided into pressure chamber and underpressure chamber by dividing plate, and pressure chamber's volume is greater than the underpressure chamber volume.
Described aeration film pipe is by having special selective permeability, high-low temperature resistant, proper physical intensity, good insulation performance, non-adhesive, acid resistance, the expansion type synthetic materials of flame retardant resistance is made, and plate-like is laid in the pressure chamber, and the last segment is laid in the underpressure chamber, according to the size of handling the water yield, aeration film pipe can be 1 pipe (layer) or in parallel 2 and manages more than (layer).
Described pressure display control program is made up of tensimeter, reducing valve, pressure transmitter, all is arranged on the housing-plate and with the pressure chamber of housing inner chamber to be communicated with.On reducing valve, also be provided with a reducing valve muffler and be communicated with, when reducing valve is exitted, gases such as ozone and oxygen, chlorine are transmitted back in the source of the gas with source of the gas.Pressure transmitter is connected with management information system, also can not establish.
Described water inlet cloth water control system is made up of water inlet flow speed controller, water inlet pipe, rising pipe, dissolved oxygen determination pond.Inlet pipe and the rising pipe two ends of the aeration film pipe outer with passing housing respectively are communicated with, water inlet pipe is provided with the waste water flow speed controller, require control water inlet flow velocity according to dissolved oxygen concentration, rising pipe is provided with the dissolved oxygen determination pond, understands the concentration situation of dissolved oxygen at any time.
This device is mainly used in middle-size and small-size water treatment environment, is suitable for the degraded and the purifying treatment of high concentrated organic wastewater, and treatment capacity is at 1～50m
3/ d.Be calculated as follows:
Day output=(film bore/2)
2* 3.14 * flow velocity * film pipe number arranged side by side * 24 * 60
Advantage of the present invention is:
(1), aeration efficient height, energy consumption is few, and is easy to operate;
(2), when adopting special gas (ozone, pure oxygen, chlorine etc.) aeration, gas can not leak, the utilization ratio height is free from environmental pollution;
(3), since Gas Solubility be directly proportional with pressure, the present invention can increase substantially gaseous tension, the pressure aeration, thereby can increase Gas Solubility;
(4), the present invention can control gaseous tension, therefore, helps realizing the automatic control of aeration process.
(4) description of drawings:
Fig. 1 is the structural representation of inner aeration type aeration device of the present invention.
(5) specific embodiment:
Inner aeration type aeration device of the present invention mainly by seal casinghousing (1), be arranged on aeration film pipe (2) in housing (1) inner chamber, be arranged on inlet pipe (7), the pressure display control program on the housing and the water inlet cloth water control system that is communicated with aeration film pipe (2) is formed with special selective permeability.The inner chamber of housing (1) is divided into independently pressure chamber (1-2), underpressure chamber (1-1) by dividing plate, pressure chamber (1-1) is greater than underpressure chamber (1-2), (1-1) pressure chamber (1-2) bottom margin is provided with outage (11), (12) in the underpressure chamber, this hole is tightened by bolt usually, be in closed state, have when leaking or overhauling as leakage fluid dram; Aeration film pipe (2) is selected for use has selective permeability, high-low temperature resistant, proper physical intensity, good insulation performance, non-adhesive, acid resistance, flame-retardant intumescent type synthetic materials is made, and according to water treatment amount and definite film length of tube of dissolved oxygen concentration requirement and internal diameter, plate-like is laid in the pressure chamber (1-1), the last section is passed dividing plate and is laid in the underpressure chamber (1-2), the two ends of aeration film pipe (2) are passed housing (1) and are communicated with water inlet pipe (3) rising pipe (9) respectively, according to the requirement of handling the water yield, aeration film pipe cloth can be made as 1 pipe (layer) or in parallel 2 and manage more than (layer) in addition.
Housing-plate (1-3) in housing (1) is gone up reducing valve (5), tensimeter (6), the pressure transmitter (8) of laying inlet pipe (7) and pressure display control program, and be communicated with the pressure chamber (1-1) of housing (1) inner chamber, pressure transmitter (8) is connected with management information system, reducing valve muffler (5-1) is set on reducing valve (5) is communicated with source of the gas.Water inlet pipe (3), the rising pipe (9) of water inlet cloth water control system and the aeration film pipe (2) that passes housing (1) are communicated with.Water inlet pipe (3) is provided with waste water flow speed controller (4), can require control water inlet flow velocity according to the water yield and dissolved oxygen concentration, rising pipe (9) is provided with dissolved oxygen determination pond (11), can understand the concentration situation of dissolved oxygen at any time, and dissolved oxygen determination pond (11) are connected with Controlling System.
During aeration, open water pump and waste water flow speed controller, make waste water or need and flow through in the aeration film pipe of water aeration liquid from the inner aeration type aeration device, open source of the gas simultaneously, make and be full of aeration gas in the housing chamber, and reach certain pressure, utilize film pipe external and internal pressure poor, make the mode of aeration gas, be distributed to equably in the tube chamber in the flowing fluid, reach gas by the tube wall micropore with microbubble, the liquid two-phase fully contacts, gas dissolving is in waste water, promptly reach the purpose of aeration, in aeration process, tensimeter is indicated the aerating apparatus pressure inside in real time, if during the pressure that pressure surpass to be set, reducing valve is opened, to keep the intravital air pressure balance of aeration shell and stable, pressure transmitter can be set in real time pressure signal be fed back to management information system, regulate input air pressure by this system.When aeration gas is ozone, in order to make full use of and reclaim remaining ozone, the ozone that comes out from safety valve is treated as the unstripped gas of ozonizer through super-dry and purification etc., and high-concentrated ozone is used for producing once more, and the water liquid that aeration is crossed can be introduced in the former active sludge pond and use.
Further specify the aeration effect of inner aeration type aeration method of the present invention and device below by an experimental result, effective than traditional aeration method.
Experiment gas: oxygen; The aeration water yield: 100ml; Dissolved oxygen meter: that HI9143 type dissolved oxygen meter is breathed out by Italy.
Table 2 is aeration mode dissolved oxygen (DO) measured value table directly
| Water sample | DO before the aeration | Temperature ℃ | Aeration time S | DO behind the aeration | Temperature ℃ |
| 1 | 3.31 | 26.7 | 16.53 | 9.66 | 26.6 |
| 2 | 2.93 | 27.1 | 16.63 | 9.90 | 26.6 |
(aeration water yield 100ml)
Table 3 inner aeration type aeration device aeration dissolved oxygen determination value table
| Water sample | DO before the aeration | Temperature ℃ | Aeration time S | DO behind the aeration | Temperature ℃ |
| 1-1 | 3.31 | 26.7 | 16.55 | 11.87 | 26.6 |
| 1-2 | 3.31 | 26.7 | 16.28 | 11.67 | 26.6 |
| 2-1 | 2.93 | 27.1 | 16.50 | 11.76 | 26.6 |
| 2-2 | 2.93 | 27.1 | 16.58 | 11.95 | 26.6 |
(aeration water yield 100ml, the intravital pressure of shell is 0.01Mpa, aeration tube length 2.20m)
By last table two kind of aeration mode measurement result as can be known, by the concentration height of the dissolved oxygen concentration behind the interior formula aerating apparatus aeration that exposes to the sun than direct aeration, if suitably strengthen the flow velocity of intravital pressure of shell or attenuating water, the concentration of dissolved oxygen will increase.Can make water outlet obtain different dissolved oxygen concentrations by the pressure of gas in the adjustment housings or the flow velocity of adjusting water.
Claims (8)
1, a kind of inner aeration type aeration method is characterized in that: waste water and gas carry out aeration respectively in an inner aeration type aeration device, the water liquid behind the aeration are introduced in the former active sludge pond again, and this method comprises the steps:
(1), guiding waste water or need the flow through aeration film pipe of inner aeration type aeration device of water aeration liquid;
(2), in the seal casinghousing of inner aeration type aeration device, inflate, adding the pressure of gas should be greater than the interfacial tension of liquid in the aeration membrane tube wall hole;
(3) adjust waste water flow velocity and gaseous tension, to obtain different dissolved oxygen concentrations;
(4) the water liquid of aeration being crossed is introduced in the former active sludge pond.
2, a kind of device that is used to realize inner aeration type aeration method, it is characterized in that: airtight housing (1) inner chamber is separated into pressure chamber (1-1) by dividing plate, underpressure chamber (1-2), the two indoor aeration film pipes (2) that are laid with, the two ends of aeration film pipe (2) pass housing (1) respectively with the water inlet pipe (3) of water inlet cloth water control system, rising pipe (9) is communicated with, the housing-plate (1-3) of housing (1) is provided with inlet pipe (7) and pressure display control program, and be communicated with the pressure chamber (1-1) of housing (1), the bottom margin of (1-1) and underpressure chamber (1-2) is provided with outage (12) and (11 of closing at ordinary times) in the pressure chamber.
3, inner aeration type aeration device according to claim 2 is characterized in that: described housing (1) is an air tight enclosure, and the pressure chamber is greater than the underpressure chamber.
4, inner aeration type aeration device according to claim 2, it is characterized in that: described aeration film pipe (2) is with having selective permeability, high-low temperature resistant, proper physical intensity, good insulation performance, the expansion type synthetic materials of non-adhesive, acid resistance, flame retardant resistance is made.
5, inner aeration type aeration device according to claim 2 is characterized in that: aeration film pipe (2) plate-like is laid in the pressure chamber (1-1), and the last section is laid in the underpressure chamber (1-2).
6, inner aeration type aeration device according to claim 2 is characterized in that: aeration film pipe (2) can be 1 layer or in parallel more than 2 layers.
7, inner aeration type aeration device according to claim 2, it is characterized in that: described pressure display control program, form by reducing valve (5), reducing valve muffler (5-1), tensimeter (6), pressure transmitter (8), all be arranged on the cover plate (1-3) of housing (1), and be communicated with the pressure chamber (1-1) of housing, pressure transmitter (8) is connected with management information system.
8, inner aeration type aeration device according to claim 2, it is characterized in that: described water inlet cloth water control system is made up of water inlet pipe (3), waste water flow speed controller (4), rising pipe (9), dissolved oxygen determination pond (10), water inlet pipe (3), rising pipe (9) are communicated with the two ends of the aeration film pipe (2) that passes housing (1) respectively, water inlet pipe (3) is provided with waste water flow speed controller (4), and rising pipe (9) is provided with dissolved oxygen determination pond (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100221522A CN100453480C (en) | 2005-11-21 | 2005-11-21 | Inner aeration type aeration method and device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100221522A CN100453480C (en) | 2005-11-21 | 2005-11-21 | Inner aeration type aeration method and device |
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| Publication Number | Publication Date |
|---|---|
| CN1970470A true CN1970470A (en) | 2007-05-30 |
| CN100453480C CN100453480C (en) | 2009-01-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2005100221522A Expired - Fee Related CN100453480C (en) | 2005-11-21 | 2005-11-21 | Inner aeration type aeration method and device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102942259A (en) * | 2012-11-30 | 2013-02-27 | 四川谦泰仁投资管理有限公司 | Ducted high-pressure high-concentration gas-liquid dissolver for renovation of water environment |
| CN106587401A (en) * | 2016-12-14 | 2017-04-26 | 江苏大学 | Aeration device used in organic water pollution degradation system |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61245899A (en) * | 1985-04-24 | 1986-11-01 | Sanki Eng Co Ltd | Treatment of organic waste water |
| AU8709491A (en) * | 1991-07-10 | 1993-01-14 | Envirex Inc. | Apparatus for dissolution of gas in liquid |
| NL1009892C2 (en) * | 1998-08-18 | 2000-02-21 | Watec B V | Biological treatment plant for purifying water, contains closed system formed by a sealed reactor tank and a gas recirculation means |
-
2005
- 2005-11-21 CN CNB2005100221522A patent/CN100453480C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102942259A (en) * | 2012-11-30 | 2013-02-27 | 四川谦泰仁投资管理有限公司 | Ducted high-pressure high-concentration gas-liquid dissolver for renovation of water environment |
| CN106587401A (en) * | 2016-12-14 | 2017-04-26 | 江苏大学 | Aeration device used in organic water pollution degradation system |
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| CN100453480C (en) | 2009-01-21 |
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Granted publication date: 20090121 Termination date: 20101121 |