WO2003016221A1 - Sectionally built aerator for concentrating machines and for waste water treatment - Google Patents

Sectionally built aerator for concentrating machines and for waste water treatment Download PDF

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Publication number
WO2003016221A1
WO2003016221A1 PCT/SE2002/001424 SE0201424W WO03016221A1 WO 2003016221 A1 WO2003016221 A1 WO 2003016221A1 SE 0201424 W SE0201424 W SE 0201424W WO 03016221 A1 WO03016221 A1 WO 03016221A1
Authority
WO
WIPO (PCT)
Prior art keywords
aerator
trough
tubular
shaped
shaped elements
Prior art date
Application number
PCT/SE2002/001424
Other languages
French (fr)
Inventor
Armen Avetian
Hamlet Gasparian
Original Assignee
Armen Avetian
Hamlet Gasparian
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Armen Avetian, Hamlet Gasparian filed Critical Armen Avetian
Publication of WO2003016221A1 publication Critical patent/WO2003016221A1/en

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Classifications

    • 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
    • C02F3/22—Activated sludge processes using circulation pipes
    • C02F3/226—"Deep shaft" processes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D19/00—Degasification of liquids
    • B01D19/0042—Degasification of liquids modifying the liquid flow
    • 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
    • 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
    • B01F23/2311—Mounting the bubbling devices or the diffusers
    • B01F23/23112—Mounting the bubbling devices or the diffusers comprising the use of flow guiding elements adjacent or above the gas stream
    • B01F23/231122—Mounting the bubbling devices or the diffusers comprising the use of flow guiding elements adjacent or above the gas stream the flow guiding elements being dome-shaped elements, i.e. for trapping air, e.g. cap-, umbrella- or inversed cone-shaped
    • 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
    • B01F23/2311—Mounting the bubbling devices or the diffusers
    • B01F23/23113—Mounting the bubbling devices or the diffusers characterised by the disposition of the bubbling elements in particular configurations, patterns or arrays
    • 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 present invention refers to a sectionally built aerator for concentrating machines and for wastewater treatment.
  • the purpose of the invention is to provide an aerator for aerating clean water and waste water for instance in activated sludge basins, sludge stabilization plants, at aerating fish breeding ponds, etcetera, and at column-shaped concentrating machines in industries for ore, minerals and coal, and the purpose is to provide a cost efficient, simple plant, which is considered to have a long service life and a few components, and this is achieved in that the aerator has been given the features defined in the characterizing part of the accompanying claim 1.
  • Fig. 1 shows in a schematic cross section through a part of a sectionally built aerator according to an embodiment of the invention.
  • Fig. 2 is a view from above of the aerator illustrated in Fig. 1, and
  • Fig. 3 and 4 show details of the aerator in bigger scale and in cross section.
  • Fig. 5 shows in a schematic cross section corresponding to Fig. 1, a simplified and modified embodiment of an aerator according to the present invention.
  • Fig. 6 is a view from above of the aerator illustrated in Fig. 5, and
  • Fig. 7 and 8 show details of the aerator according to Fig. 5 in bigger scale and in cross section.
  • the aerator according to the invention is intended to be located in the position illustrated in Fig. 1 in a (not shown) volume of liquid, which shall be ventilated.
  • the aerator 1 incorporates a number of sections 2 in the form of trough-shaped elements, which are positioned with their openings facing downwards, and each one of which in its end wall 3 facing upwards being equipped with a an opening formed as a tubular sleeve 4 of smaller diameter than that of the trough-shaped element.
  • each tubular sleeve 4 there are provided concentric tubular members 5, 6 operating as injectors, whereby the first member 5 has bigger diameter than the tubular sleeve 4 positioned there below and being arranged to enclose in concentric fashion the upper part of this tubular sleeve 4, thus that there is a slot between the tubular member 5 and the end wall 3 of the trough-shaped element.
  • the second tubular member 6 arranged there above in turn has bigger inner diameter than the outer diameter of the first member 5, and being arranged to enclose in concentric fashion the upper part of the first tubular member 5, thus that there is a slot between the inner surface of the second tubular member 6 and the outer surface of the first tubular member 5.
  • the stack of trough-like elements 2 arranged above each other with tubular sleeve 4 and the tubular members 5, 6 provided between these are supported in the embodiment shown by three posts 7, 8, 9 (see Fig. 2), at least one post 7 of which, but preferably all being tubular.
  • pressurized air is supplied through at last one of the tubular posts 7, which pressurized air is pressed into tubular sleeve 4 projecting upwards from the lower trough-shaped element. Then the air rises through the tubular members 5, 6, whereby liquid is pulled along and is put into motion.
  • An appropriate height for each of the sections can be 70 cm.
  • a basin having a volume of about 360 m 2 it is required about 20 to 25 aerators of the type in question, and the cost for installation of the aerator in question is about 600-700 SEK per m 2 of basin surface when using plastic material, whereas the cost for the aerator in stainless steel could amount to about 1000-1200 SEK per m 2 .
  • tubular membrane aerators of conventional type on the other hand was used, a basin of corresponding size should require about 300 such aerators at an installation cost of about 2500 SEK/ m 2 basin surface.
  • Fig. 3 illustrates in a partial cross section through the aerator according to Fig. 1 and in bigger scale how one of the tubular posts 7 via a simple supporting bracket 10, which is arrestable to the post at any desired level by means of a screw 11, together with similar supporting brackets on the other posts supports the trough-shaped element 2, whereas its tubular sleeve 4 at its upper edge supports a number of braces 12, shaped substantially as spokes in a hub, and which together support the first tubular member 5.
  • the second tubular member which is arranged there above, but not shown in this figure, is for instance by means of similar braces attached to the first member 5.
  • Fig. 4 is shown in a partial cross section through the aerator according to Fig. 1 and in bigger scale how one of the tubular posts 7 is equipped with a tubular channel 13 communicating therewith, and which opens at the lower inlet of the tubular sleeve 4 of the lower trough-shaped element. Through this tubular post 7 and the tubular channel 13 pressurized air thus is supplied into the lower part of the aerator.
  • Fig. 5 shows in a cross section corresponding to Fig. 1 an aerator according to the present invention, which is modified and simplified in relation to that one shown in Fig. 1.
  • the aerator is located in a not shown volume of liquid, which shall be treated, and the aerator 21 incorporates a number of sections 22 in form of trough- shaped elements, which are turned with their opening downwards and each one of which in the end wall 23 facing upwards has a centrally located through opening 24.
  • trough-shaped elements 22 located in line above each other, but the number of trough-shaped elements can be varied depending on the vertical measure of the liquid mass in which the aerator is positioned.
  • the trough-shaped elements 22 are supported by a number of posts 27, 28, 29, (Fig. 6), at least one of which posts 27, but preferably all being tubular.
  • pressurized air is supplied via a conduit 25 into the body of liquid below the lower trough-shaped element 22.
  • the tubular post 27 is preferably but not necessary communicating with the conduit 25, such as illustrated in Fig. 8, whereby the pressurized air can be easily supplied to the lower part of the aerator via the post 27 and the conduit 25.
  • the large number of minute bubbles When using the aerator for treatment of wastewater the large number of minute bubbles will supply atmospheric oxygen to the wastewater for oxygenizing thereof.
  • the bubbles When used for concentrating purposes the bubbles, which can have a maximum size of 0,1 to 1 mm, will rise up towards the surface of the liquid mass and thereby bring along material particles from the mass to be concentrated.
  • Fig. 7 illustrates in a partial cross section how a simple supporting bracket 30 by means of a screw joint 31 can be arrested to one of the posts 27.
  • the different trough-shaped elements 22 can be adjusted and arrested at suitable, arbitrary levels.
  • the material in the aerator can be plastic material or metal or combinations thereof, depending on the liquids for which the aerator shall be used.
  • the pressurized air might for instance be supplied via a conduit, which does not extend through one of the supporting posts, and as mentioned above is it possible that the aerator may be equipped with an arbitrary number of sections of trough-shaped elements, and with or without tubular sleeves and tubular members acting as injectors.

Abstract

Sectionally built aerator for concentrating machines and for waste water treatment, whereby the aerator incorporates a number of sections of through-shaped elements (2) arranged at a distance above each other, and which are arranged to communicate via a number of tubular members (5, 6) acting as injectors, with slots provided between trough-shaped elements and injectors, and where a conduit (13) is connected to the lower trough-shaped element for supply of pressurized air from below, whereby the entire aerator (1) is submersed in a mass of liquid, which shall be subjected to ventilation.

Description

SECTIONALLY BUILT AERATOR FOR CONCENTRATING MACHINES AND FOR WASTE WATER TREATMENT
The present invention refers to a sectionally built aerator for concentrating machines and for wastewater treatment.
The purpose of the invention is to provide an aerator for aerating clean water and waste water for instance in activated sludge basins, sludge stabilization plants, at aerating fish breeding ponds, etcetera, and at column-shaped concentrating machines in industries for ore, minerals and coal, and the purpose is to provide a cost efficient, simple plant, which is considered to have a long service life and a few components, and this is achieved in that the aerator has been given the features defined in the characterizing part of the accompanying claim 1.
Hereinafter the invention will be further described with reference to embodiments shown in the accompanying drawings.
Fig. 1 shows in a schematic cross section through a part of a sectionally built aerator according to an embodiment of the invention.
Fig. 2 is a view from above of the aerator illustrated in Fig. 1, and
Fig. 3 and 4 show details of the aerator in bigger scale and in cross section.
Fig. 5 shows in a schematic cross section corresponding to Fig. 1, a simplified and modified embodiment of an aerator according to the present invention.
Fig. 6 is a view from above of the aerator illustrated in Fig. 5, and
Fig. 7 and 8 show details of the aerator according to Fig. 5 in bigger scale and in cross section. The aerator according to the invention is intended to be located in the position illustrated in Fig. 1 in a (not shown) volume of liquid, which shall be ventilated. The aerator 1 incorporates a number of sections 2 in the form of trough-shaped elements, which are positioned with their openings facing downwards, and each one of which in its end wall 3 facing upwards being equipped with a an opening formed as a tubular sleeve 4 of smaller diameter than that of the trough-shaped element. Above each tubular sleeve 4 there are provided concentric tubular members 5, 6 operating as injectors, whereby the first member 5 has bigger diameter than the tubular sleeve 4 positioned there below and being arranged to enclose in concentric fashion the upper part of this tubular sleeve 4, thus that there is a slot between the tubular member 5 and the end wall 3 of the trough-shaped element. The second tubular member 6 arranged there above, in turn has bigger inner diameter than the outer diameter of the first member 5, and being arranged to enclose in concentric fashion the upper part of the first tubular member 5, thus that there is a slot between the inner surface of the second tubular member 6 and the outer surface of the first tubular member 5. The upper part of the second tubular member 6, which has smaller diameter than the lower opening of the trough-shaped element 2 laying there above, extends a short distance up into the trough-shaped element 2 laying there above.
In the schematically illustrated aerator according to Fig. 1, there are three trough-shaped elements 2, and for each one of these two tubular members 5, 6 acting as injectors, but the number of trough-shaped elements and the number of injectors can be increased depending on the depth of the fluid body, which shall be ventilated.
The stack of trough-like elements 2 arranged above each other with tubular sleeve 4 and the tubular members 5, 6 provided between these are supported in the embodiment shown by three posts 7, 8, 9 (see Fig. 2), at least one post 7 of which, but preferably all being tubular. In the embodiment illustrated pressurized air is supplied through at last one of the tubular posts 7, which pressurized air is pressed into tubular sleeve 4 projecting upwards from the lower trough-shaped element. Then the air rises through the tubular members 5, 6, whereby liquid is pulled along and is put into motion. When the raising mass, consisting of air and liquid, reaches the inner side of the end wall 3 of the element positioned there above a portion thereof will pass directly up through the tubular sleeve 4 in this trough-shaped element 2, whereas a portion forcefully will impinge the end wall, resulting in discharge of minute air bubbles, having a size of about 0,05 - 1 mm from this trough-shaped element 2, and thereby carry along particles and pollutions present in the liquid, which shall be ventilated.
Thus process is repeated for every section of the trough-shaped elements forming part of the aerator in question. An appropriate height for each of the sections can be 70 cm. For a basin having a volume of about 360 m2 it is required about 20 to 25 aerators of the type in question, and the cost for installation of the aerator in question is about 600-700 SEK per m2 of basin surface when using plastic material, whereas the cost for the aerator in stainless steel could amount to about 1000-1200 SEK per m2. If for instance tubular membrane aerators of conventional type on the other hand was used, a basin of corresponding size should require about 300 such aerators at an installation cost of about 2500 SEK/ m2 basin surface.
Fig. 3 illustrates in a partial cross section through the aerator according to Fig. 1 and in bigger scale how one of the tubular posts 7 via a simple supporting bracket 10, which is arrestable to the post at any desired level by means of a screw 11, together with similar supporting brackets on the other posts supports the trough-shaped element 2, whereas its tubular sleeve 4 at its upper edge supports a number of braces 12, shaped substantially as spokes in a hub, and which together support the first tubular member 5. The second tubular member, which is arranged there above, but not shown in this figure, is for instance by means of similar braces attached to the first member 5.
In Fig. 4 is shown in a partial cross section through the aerator according to Fig. 1 and in bigger scale how one of the tubular posts 7 is equipped with a tubular channel 13 communicating therewith, and which opens at the lower inlet of the tubular sleeve 4 of the lower trough-shaped element. Through this tubular post 7 and the tubular channel 13 pressurized air thus is supplied into the lower part of the aerator. Fig. 5 shows in a cross section corresponding to Fig. 1 an aerator according to the present invention, which is modified and simplified in relation to that one shown in Fig. 1. Also in this case the aerator is located in a not shown volume of liquid, which shall be treated, and the aerator 21 incorporates a number of sections 22 in form of trough- shaped elements, which are turned with their opening downwards and each one of which in the end wall 23 facing upwards has a centrally located through opening 24.
In the embodiment illustrated there are three trough-shaped elements 22 located in line above each other, but the number of trough-shaped elements can be varied depending on the vertical measure of the liquid mass in which the aerator is positioned.
The trough-shaped elements 22 are supported by a number of posts 27, 28, 29, (Fig. 6), at least one of which posts 27, but preferably all being tubular. In the embodiment shown pressurized air is supplied via a conduit 25 into the body of liquid below the lower trough-shaped element 22. The tubular post 27 is preferably but not necessary communicating with the conduit 25, such as illustrated in Fig. 8, whereby the pressurized air can be easily supplied to the lower part of the aerator via the post 27 and the conduit 25.
When the pressurized air this is caused to bubble out into the mass of liquid below the trough-shaped element, this will take place in form of a cluster of minute air bubbles. These will on one hand continue upwards through the central opening 24 to the element laying directly there above and on the other hand bubble out below the edge of the element, such as illustrated with an arrow. In this manner a portion of the supplied volume of air (for instance a third) will be converted to air bubbles bubbling upwards from the edge of the element 22 and a portion will be displaced up trough the central opening 24, whereby the same thing will be repeated.
When using the aerator for treatment of wastewater the large number of minute bubbles will supply atmospheric oxygen to the wastewater for oxygenizing thereof. When used for concentrating purposes the bubbles, which can have a maximum size of 0,1 to 1 mm, will rise up towards the surface of the liquid mass and thereby bring along material particles from the mass to be concentrated.
Fig. 7 illustrates in a partial cross section how a simple supporting bracket 30 by means of a screw joint 31 can be arrested to one of the posts 27. By means of such supporting brackets 30 at all of the posts, the different trough-shaped elements 22 can be adjusted and arrested at suitable, arbitrary levels.
Somewhat unsuspected it has proven itself that the more simple variation according to Figs. 5 to 8 in most cases will give a sufficiently good effect without need of the injectors, which are provided at the embodiment according Figs. 1 to 4.
The material in the aerator can be plastic material or metal or combinations thereof, depending on the liquids for which the aerator shall be used.
The invention is not limited to the embodiments illustrated in the accompanying drawings and described in connection thereto, but variations and modifications are possible within the scope of the following claims.
Thus the pressurized air might for instance be supplied via a conduit, which does not extend through one of the supporting posts, and as mentioned above is it possible that the aerator may be equipped with an arbitrary number of sections of trough-shaped elements, and with or without tubular sleeves and tubular members acting as injectors.

Claims

1. Sectionally built aerator for concentrating machines and for wastewater treatment, characterized therein, that the aerator incorporates a number of sections of trough-shaped elements (2, 22) arranged at a distance above each other, and which are arranged to communicate via a hole (4, 24) provided in each element, and where a conduit (13, 25) is connected to the lower trough-shaped element for supply of pressurized air from below, whereby the entire aerator (1, 21) is submersed in a mass of liquid, which shall be subjected to ventilation.
2. Aerator according to claim 1, characterized therein, that every trough-shaped element (2, 22) is open at its lower side and is equipped with an upper end wall (3, 23), in which said holes (4, 24) are arranged in a concentric manner.
3. Aerator according to claim 1 or 2, characterized therein, that between each pair of adjacent trough-shaped elements (2), are provided at least two tubular members (5, 6) acting as injectors, and arranged to enclose said holes and each having a bigger diameter than the tubular member or the tubular sleeve (4) situated directly there below, but where the diameter of the tubular member (6) situated closest to the overlaying trough-shaped element (2) has smaller diameter than the trough- shaped element (2).
4. Aerator according to anyone of the preceding claims, characterized therein, that the different trough-shaped elements (2, 22), which are arranged at mutually spaced apart vertical distances are supported by a number of (7,8,9, 27, 28, 29) provided around the circumference.
5. Aerator according to claim 4, characterized therein, that at least one of the posts (7, 27) is tubular and designed to communicate with the conduit (13, 25) for supply of pressurized air into the aerator.
6. Aerator according to claims 4 or 5, characterized therein, that the trough-shaped elements (2, 22) are arrestable to the posts (7, 8, 9, 27, 28, 29) by means of supporting means (10,11, 30, 31) arrestable at arbitrary levels.
7. Aerator according to anyone of claims 3-6, characterized therein, that the tubular members (5, 6) are arrestable to the tubular sleeve (4) or the tubular member (5) situated directly there below by means of spoke-shaped braces (12).
PCT/SE2002/001424 2001-08-13 2002-08-06 Sectionally built aerator for concentrating machines and for waste water treatment WO2003016221A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE0102705-1 2001-08-13
SE0102705A SE0102705D0 (en) 2001-08-13 2001-08-13 Sectional composite aerator for enrichment machines and for wastewater

Publications (1)

Publication Number Publication Date
WO2003016221A1 true WO2003016221A1 (en) 2003-02-27

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PCT/SE2002/001424 WO2003016221A1 (en) 2001-08-13 2002-08-06 Sectionally built aerator for concentrating machines and for waste water treatment

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WO (1) WO2003016221A1 (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1985000298A1 (en) * 1983-07-07 1985-01-31 The British Hydromechanics Research Association Contacting a gas and a liquid to remove an unwanted gas
US5268077A (en) * 1991-02-27 1993-12-07 Sulzer Esher Wyss Gmbh Apparatus and method for deaerating or degassing a paper stock suspension

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1985000298A1 (en) * 1983-07-07 1985-01-31 The British Hydromechanics Research Association Contacting a gas and a liquid to remove an unwanted gas
US5268077A (en) * 1991-02-27 1993-12-07 Sulzer Esher Wyss Gmbh Apparatus and method for deaerating or degassing a paper stock suspension

Also Published As

Publication number Publication date
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