CA1149374A - Diffuser system - Google Patents
Diffuser systemInfo
- Publication number
- CA1149374A CA1149374A CA000361062A CA361062A CA1149374A CA 1149374 A CA1149374 A CA 1149374A CA 000361062 A CA000361062 A CA 000361062A CA 361062 A CA361062 A CA 361062A CA 1149374 A CA1149374 A CA 1149374A
- Authority
- CA
- Canada
- Prior art keywords
- diffuser
- cone
- pipe
- gas
- arcuate surface
- Prior art date
- Legal status (The legal status 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 status listed.)
- Expired
Links
- 238000004891 communication Methods 0.000 claims abstract description 4
- 230000006854 communication Effects 0.000 claims abstract description 4
- 239000012260 resinous material Substances 0.000 claims abstract 2
- 239000002351 wastewater Substances 0.000 claims description 12
- 239000007789 gas Substances 0.000 description 25
- 230000000712 assembly Effects 0.000 description 3
- 238000000429 assembly Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 238000005273 aeration Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- 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
- B01F23/23114—Mounting the bubbling devices or the diffusers characterised by the way in which the different elements of the bubbling installation are mounted
- B01F23/231143—Mounting the bubbling elements or diffusors, e.g. on conduits, using connecting elements; Connections therefor
-
- 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
- B01F23/231262—Diffusers characterised by the shape of the diffuser element having disc shape
-
- 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
- B01F23/231263—Diffusers characterised by the shape of the diffuser element having dome-, cap- or inversed cone-shape
-
- 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
- C02F3/20—Activated sludge processes using diffusers
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Biodiversity & Conservation Biology (AREA)
- Microbiology (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Aeration Devices For Treatment Of Activated Polluted Sludge (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
A diffuser system has in combination, an elongated thin-walled pipe of synthetic resinous material and a diffuser assembly permanently bonded to the pipe. The diffuser assembly comprises an inverted cone with a portion thereof truncated to form an arcuate surface, a domed diffuser covering the base of the cone to define a gas chamber and a gas passage located at the tip of the cone to allow communication between the gas chamber and the pipe.
A diffuser system has in combination, an elongated thin-walled pipe of synthetic resinous material and a diffuser assembly permanently bonded to the pipe. The diffuser assembly comprises an inverted cone with a portion thereof truncated to form an arcuate surface, a domed diffuser covering the base of the cone to define a gas chamber and a gas passage located at the tip of the cone to allow communication between the gas chamber and the pipe.
Description
Field of the Invention This invention relates to an improved diffuser system for use in aerating waste water~and the like by diffusiJig gases into liquids.
Background of the Invention The basic arrangement for diffusing air into waste water for purification by the activated slude process comprises a plural-ity of inverted dish-shaped or dome-shaped diffusers having porous walls mounted and spacially set apart on air supply pipes. Each of the diffusers are positioned over an opening in the air supply pipe so that the air is diffused through the walls of the diffusers in the form of small bubbles which bubbles float up through the waste water and the like.
With the use of polyvinyl chloride air supply pipes a new configuration for the diffuser system was introduced whereby the diffuser system comprised of a saddle arrangement to sit on top of and to straddle the air supply pipe and gas opening therethrough.
The saddle arrangement has a central boss which extends into the opening on top of the air supply pipe and the saddle arrangement is bonded permanently to the air supply pipe. The dish or domed-~
diffuser ~s- fastened to the saddle arrangement by means of a bolt with a blind bore therein, which bolt i6 secured to the boss. ~he bolt has an opening in the side to allow communication between the gas chamber created by the domed diffuser and the saddle and the blind bore, the opening of which communicateS with the air supply pipe.
The foregoing arrangement simplified the installation of the diffuser system as well as the maintenance thereof. However, any time that the system was shut down, waste water would seep ~1~9374 through the porous aomed diffuser and into the gas chamber and remain. The waste wateT Temaining trapped in the gas GhambeT is eventually evapoTated by the air which is supplied to the gas chamber and diffused through the diffuser. The residue or pre-cipitate which remains eventually builds up within the gas chamber and is deposited on the inside surface of the diffuser dome by the air flow thus block;ng the passage o:E air through the diffuser.
The diffuser assemblies described above created further problems during installation when moisturé (usually in the form of rain) collected in the saddle arrangement before the domed diffuser was put into place. This necessitated the cleaning and removal of the moisture from each and every diffuser assembly which usually numbers in the thousands for an aeration system.
It is theTefore an object of the present invention to pTovide a diffuser system which may be easily installed and main-tained as well as eliminate the settling of the waste water within the diffuser system.
SummaTy of the Invention The present invention is directed to a diffuser system for diffusing gases into waste water and the like. According to the invention there is provided a diffuser system comprising in combination an elongated thin-walled pipe of Tesinous material having connection to a gas supply and provided with an opening through a wall portion thereof. A diffuser assembly co~.prises an inverted cone with a portion of the cone truncated to form an arcuate surface for face to face bonding with the upper quadrant of the gas supply pipe such that the base of the cone is hori-zontal. The lower poTtion of the arcuate surface adjacent the tip of the cone has a boss poTtion extending outwardly from the ~93~7~
arcuate surface for seating and registering in the opening of the gas supply pipe. The arcuate surface is permanently bonded to the pipe. ~he base of the cone teTminates in an annular baseplate presenting a seat. A porous dished diffuser is seated on the base-p]ate and defines with the cone a gas chamber. A fastener means is provided for holding the dished diffuser to the cone. A gas passage is located at the tip oE the cone for comm~mication between the pipe and the gas chamber.
Another embodiment of the invention provides for the opening of the gas passage adjacent the pipe to be lower than the opening of ~he gas passage adjacent the gas chamber.
Brief Description of the ~rawings -Other and further objects and advantages of the inven-tion will become apparent to those skilled in the art from the lS consideration of the following specification when read in con-junction with the annexed drawings wherein:
Figure 1 is a perspective view of the diffuser system and a portion of the gas supply pipe.
Figure 2 is a cross-sectional view taken along line 2-2 of Figure 1.
Detailed Description of the PrefeTred Embodiment Referring tc the drawing, there is provided a diffuser assembly generally designated as 10 comprised of an inverted cone 11 which has a portion thereof truncated to form an arcuate sur-face 12. ~he arcuate surface 12 has near its lower end and ad-jacent the tipe 13 a boss portion 14 extending outwardly from the arcuate surface. The arcuate surface 12 is adapted to be in face to face contact with the upper quadrant surface of the pipe 15.
The pipe 15 has an opening therein designated as 16 in which the 11~9374 boss 14 is seated. The arcuate surface 12 is perm~nently bonded to the pipe 15.
The base of the cone 11 terminates in an annular base-plate 17 which is adapted to receive the domed diffuser 18. The annular baseplate has sealing ribs 19 to prevent leakage of fluid between the contact surface of the baseplate 17 and the annular gasket 24 which is located between the baseplate and the diffuser dome 18. The diffuser dome 18 is held in contact with the gasket and baseplate by means of a bolt 20 which ex-tends through the diffuser dome and is anchored in the threaded opening 21 in the inte m al boss portion 24.
A gas passage 22 is located at the tip of the cone 11 and extends from the interior of the gas supply pipe 15 to the gas chamber 23 defined by the domed diffuser 18 and cone 11.
When the air supply to the diffuser assembly is in-terrupted for any reason, the static pressure from the waste water causes the waste water to enter through the porous diffuser dome and settle within gas chamber 23. The gas passage-way 22 is located such that the settled waste water will flow down into the air supply pipe from which the liquid may be removed by means of a standard`moisture blow-off assembly.
The aeration system has a series of the diffuser assemblies located along the air supply pipe and in order to balance the entire system the diffuser system is alte m ately located on opposite sides of the pipe. By alte m ating the location of the diffuser assemblies on opposite sides of the air supply pipe a wider band of influence is created whereby the diffused air comes into contact with a greater volu~.e of waste water thus increasing the transfer and mixing efficiencies.
This system has the advantage of being as easy to assemble as ~1~9374 any other system presently in existence with the further advan-tages of preventing the settling of waste water within the gas chamber and the elimination of a special bolt to hold the diffuser dome to the cone. In other well known systems the fastening bolt is also used as the air passageway for com-munication between the inside of the air supply pipe and the gas chamber 23 and thus a special bolt is required having a blind bore therein. In the present system any standard bolt may be used.
While a specific embodiment of the invention has been illustrated and described, it is understood that varia-tions may be made by those skilled in the art without depart-ing from the spirit of the invention and the scope of the appended claim.
Background of the Invention The basic arrangement for diffusing air into waste water for purification by the activated slude process comprises a plural-ity of inverted dish-shaped or dome-shaped diffusers having porous walls mounted and spacially set apart on air supply pipes. Each of the diffusers are positioned over an opening in the air supply pipe so that the air is diffused through the walls of the diffusers in the form of small bubbles which bubbles float up through the waste water and the like.
With the use of polyvinyl chloride air supply pipes a new configuration for the diffuser system was introduced whereby the diffuser system comprised of a saddle arrangement to sit on top of and to straddle the air supply pipe and gas opening therethrough.
The saddle arrangement has a central boss which extends into the opening on top of the air supply pipe and the saddle arrangement is bonded permanently to the air supply pipe. The dish or domed-~
diffuser ~s- fastened to the saddle arrangement by means of a bolt with a blind bore therein, which bolt i6 secured to the boss. ~he bolt has an opening in the side to allow communication between the gas chamber created by the domed diffuser and the saddle and the blind bore, the opening of which communicateS with the air supply pipe.
The foregoing arrangement simplified the installation of the diffuser system as well as the maintenance thereof. However, any time that the system was shut down, waste water would seep ~1~9374 through the porous aomed diffuser and into the gas chamber and remain. The waste wateT Temaining trapped in the gas GhambeT is eventually evapoTated by the air which is supplied to the gas chamber and diffused through the diffuser. The residue or pre-cipitate which remains eventually builds up within the gas chamber and is deposited on the inside surface of the diffuser dome by the air flow thus block;ng the passage o:E air through the diffuser.
The diffuser assemblies described above created further problems during installation when moisturé (usually in the form of rain) collected in the saddle arrangement before the domed diffuser was put into place. This necessitated the cleaning and removal of the moisture from each and every diffuser assembly which usually numbers in the thousands for an aeration system.
It is theTefore an object of the present invention to pTovide a diffuser system which may be easily installed and main-tained as well as eliminate the settling of the waste water within the diffuser system.
SummaTy of the Invention The present invention is directed to a diffuser system for diffusing gases into waste water and the like. According to the invention there is provided a diffuser system comprising in combination an elongated thin-walled pipe of Tesinous material having connection to a gas supply and provided with an opening through a wall portion thereof. A diffuser assembly co~.prises an inverted cone with a portion of the cone truncated to form an arcuate surface for face to face bonding with the upper quadrant of the gas supply pipe such that the base of the cone is hori-zontal. The lower poTtion of the arcuate surface adjacent the tip of the cone has a boss poTtion extending outwardly from the ~93~7~
arcuate surface for seating and registering in the opening of the gas supply pipe. The arcuate surface is permanently bonded to the pipe. ~he base of the cone teTminates in an annular baseplate presenting a seat. A porous dished diffuser is seated on the base-p]ate and defines with the cone a gas chamber. A fastener means is provided for holding the dished diffuser to the cone. A gas passage is located at the tip oE the cone for comm~mication between the pipe and the gas chamber.
Another embodiment of the invention provides for the opening of the gas passage adjacent the pipe to be lower than the opening of ~he gas passage adjacent the gas chamber.
Brief Description of the ~rawings -Other and further objects and advantages of the inven-tion will become apparent to those skilled in the art from the lS consideration of the following specification when read in con-junction with the annexed drawings wherein:
Figure 1 is a perspective view of the diffuser system and a portion of the gas supply pipe.
Figure 2 is a cross-sectional view taken along line 2-2 of Figure 1.
Detailed Description of the PrefeTred Embodiment Referring tc the drawing, there is provided a diffuser assembly generally designated as 10 comprised of an inverted cone 11 which has a portion thereof truncated to form an arcuate sur-face 12. ~he arcuate surface 12 has near its lower end and ad-jacent the tipe 13 a boss portion 14 extending outwardly from the arcuate surface. The arcuate surface 12 is adapted to be in face to face contact with the upper quadrant surface of the pipe 15.
The pipe 15 has an opening therein designated as 16 in which the 11~9374 boss 14 is seated. The arcuate surface 12 is perm~nently bonded to the pipe 15.
The base of the cone 11 terminates in an annular base-plate 17 which is adapted to receive the domed diffuser 18. The annular baseplate has sealing ribs 19 to prevent leakage of fluid between the contact surface of the baseplate 17 and the annular gasket 24 which is located between the baseplate and the diffuser dome 18. The diffuser dome 18 is held in contact with the gasket and baseplate by means of a bolt 20 which ex-tends through the diffuser dome and is anchored in the threaded opening 21 in the inte m al boss portion 24.
A gas passage 22 is located at the tip of the cone 11 and extends from the interior of the gas supply pipe 15 to the gas chamber 23 defined by the domed diffuser 18 and cone 11.
When the air supply to the diffuser assembly is in-terrupted for any reason, the static pressure from the waste water causes the waste water to enter through the porous diffuser dome and settle within gas chamber 23. The gas passage-way 22 is located such that the settled waste water will flow down into the air supply pipe from which the liquid may be removed by means of a standard`moisture blow-off assembly.
The aeration system has a series of the diffuser assemblies located along the air supply pipe and in order to balance the entire system the diffuser system is alte m ately located on opposite sides of the pipe. By alte m ating the location of the diffuser assemblies on opposite sides of the air supply pipe a wider band of influence is created whereby the diffused air comes into contact with a greater volu~.e of waste water thus increasing the transfer and mixing efficiencies.
This system has the advantage of being as easy to assemble as ~1~9374 any other system presently in existence with the further advan-tages of preventing the settling of waste water within the gas chamber and the elimination of a special bolt to hold the diffuser dome to the cone. In other well known systems the fastening bolt is also used as the air passageway for com-munication between the inside of the air supply pipe and the gas chamber 23 and thus a special bolt is required having a blind bore therein. In the present system any standard bolt may be used.
While a specific embodiment of the invention has been illustrated and described, it is understood that varia-tions may be made by those skilled in the art without depart-ing from the spirit of the invention and the scope of the appended claim.
Claims (3)
1. A diffuser system for diffusing gas into waste water and the like comprising in combination an elongated thin-walled pipe of synthetic resinous material having connection to a gas supply and provided with an opening through a wall portion thereof, a diffuser assembly comprising an inverted cone with a portion of said cone truncated to form an arcuate surface for face to face bonding with the upper quadrant of said pipe, such that the base of said cone is substantially horizontal, and the major axes of said cone and said pipe are non-coplanar, lower portion of said arcuate surface adjacent the tip having a boss portion extending outwardly from said arcuate surface for seating and registering in said opening, said base of said cone terminating in an annular baseplate presenting a seat, means permanently bonding said arcuate surface to said pipe, a porous dished diffuser seated upon said baseplate and defining with said cone a gas chamber, a fastener means for holding said dished diffuser to said cone, a gas passage located at the tip of said cone for communication between said pipe and said gas chamber.
2. A diffuser system as claimed in Claim 1 wherein said gas passage adjacent said pipe is lower than said gas passage adjacent said gas chamber.
3. A diffuser system as claimed in Claim 2 where said fastener means comprises a bolt anchored to an internal boss portion at one end and bearing against said diffuser dish at the opposite end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000361062A CA1149374A (en) | 1980-09-25 | 1980-09-25 | Diffuser system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000361062A CA1149374A (en) | 1980-09-25 | 1980-09-25 | Diffuser system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1149374A true CA1149374A (en) | 1983-07-05 |
Family
ID=4117994
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000361062A Expired CA1149374A (en) | 1980-09-25 | 1980-09-25 | Diffuser system |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1149374A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5075048A (en) * | 1990-07-23 | 1991-12-24 | Ferro Corporation | Gas diffuser dome |
| US5888391A (en) * | 1998-09-15 | 1999-03-30 | Sovmestnoe Rossysko-Ukrainskoe predpriyatie Obshestvo s ogranichennoi otvetstvennostju Nauchno--proizvodstvennaya firma Ecopolimer (OOO NPF "Ecopolimer") | Aerating device |
| US20150122740A1 (en) * | 2013-11-01 | 2015-05-07 | Anthony L. Powell | Fluid treatment system |
-
1980
- 1980-09-25 CA CA000361062A patent/CA1149374A/en not_active Expired
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5075048A (en) * | 1990-07-23 | 1991-12-24 | Ferro Corporation | Gas diffuser dome |
| US5888391A (en) * | 1998-09-15 | 1999-03-30 | Sovmestnoe Rossysko-Ukrainskoe predpriyatie Obshestvo s ogranichennoi otvetstvennostju Nauchno--proizvodstvennaya firma Ecopolimer (OOO NPF "Ecopolimer") | Aerating device |
| US20150122740A1 (en) * | 2013-11-01 | 2015-05-07 | Anthony L. Powell | Fluid treatment system |
| US10005686B2 (en) * | 2013-11-01 | 2018-06-26 | 1934612 Ontario Inc. | Fluid treatment system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |