GB2063694A - Improvements in circulating and gasifying apparatus partly or wholly submerged in a fluid - Google Patents
Improvements in circulating and gasifying apparatus partly or wholly submerged in a fluid Download PDFInfo
- Publication number
- GB2063694A GB2063694A GB7910767A GB7940767A GB2063694A GB 2063694 A GB2063694 A GB 2063694A GB 7910767 A GB7910767 A GB 7910767A GB 7940767 A GB7940767 A GB 7940767A GB 2063694 A GB2063694 A GB 2063694A
- Authority
- GB
- United Kingdom
- Prior art keywords
- orifice
- diaphragm
- pressure head
- fluid
- return valve
- 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.)
- Withdrawn
Links
- 239000012530 fluid Substances 0.000 title claims abstract description 15
- 238000009434 installation Methods 0.000 claims abstract description 11
- 239000007788 liquid Substances 0.000 claims abstract description 11
- 239000010802 sludge Substances 0.000 claims abstract description 11
- 239000000463 material Substances 0.000 claims abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- 230000002706 hydrostatic effect Effects 0.000 claims description 4
- 230000000903 blocking effect Effects 0.000 claims description 2
- 238000012423 maintenance Methods 0.000 claims description 2
- 230000007257 malfunction Effects 0.000 claims description 2
- 230000009972 noncorrosive effect Effects 0.000 claims description 2
- 230000002093 peripheral effect Effects 0.000 claims description 2
- 230000000717 retained effect Effects 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract 1
Classifications
-
- 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
- B01F35/71—Feed mechanisms
- B01F35/712—Feed mechanisms for feeding fluids
-
- 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
-
- 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
- B01F23/232—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using flow-mixing means for introducing the gases, e.g. baffles
- B01F23/2323—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using flow-mixing means for introducing the gases, e.g. baffles by circulating the flow in guiding constructions or conduits
- B01F23/23231—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using flow-mixing means for introducing the gases, e.g. baffles by circulating the flow in guiding constructions or conduits being at least partially immersed in the liquid, e.g. in a closed circuit
- B01F23/232311—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using flow-mixing means for introducing the gases, e.g. baffles by circulating the flow in guiding constructions or conduits being at least partially immersed in the liquid, e.g. in a closed circuit the conduits being vertical draft pipes with a lower intake end and an upper exit end
-
- 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
- B01F35/30—Driving arrangements; Transmissions; Couplings; Brakes
- B01F35/32—Driving arrangements
- B01F35/32005—Type of drive
- B01F35/3203—Gas driven
-
- 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
- B01F35/71—Feed mechanisms
- B01F35/717—Feed mechanisms characterised by the means for feeding the components to the mixer
- B01F35/71805—Feed mechanisms characterised by the means for feeding the components to the mixer using valves, gates, orifices or openings
-
- 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
- C02F3/223—Activated sludge processes using circulation pipes using "air-lift"
-
- 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
- B01F35/30—Driving arrangements; Transmissions; Couplings; Brakes
- B01F35/32—Driving arrangements
- B01F35/32005—Type of drive
- B01F35/32015—Flow driven
-
- 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
- B01F35/71—Feed mechanisms
-
- 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)
- Treatment Of Sludge (AREA)
Abstract
A non-return valve 13A is fitted to an orifice 13 in an apparatus W to prevent blockage of said orifice during installation from a fluid flow in opposition to that experienced in use. The fluid flow is for example a flow of liquid with entrained foreign material as experienced in sludge treatment process. <IMAGE>
Description
SPECIFICATION
Improvements in apparatus partly or wholly to be immersed in a fluid
This invention relates to apparatus that in use is immersed partly or wholly in a fluid and thereby subjected to a pressure head. It is clear that any apparatus that is installed for example below the surface of a liquid will be subjected to a hydrostatic pressure head but it is generally lost sight of that a given depth will subject the apparatus to liquid flow through its orifices and apertures by virtue of said pressure head before it is connected for its correct operation in use, and that this liquid flow may be such as to block or otherwise cause malfunction of the apparatus before it is operational.We have found as one illustration of the drawback referred to above and possible danger therefrom that our apparatus described and claimed in United Kingdom Patent
Specification 1,519,644 provided in use with an air bubble emitting orifice of 6 mm diameter for pressurized air was blocked by an article of clothing irrevocably forced into it by a pressure head generated by but a few feet of sludge water.
According to the present invention this drawback is overcome in apparatus that is to be installed in a fluid and thereby subjected to a pressure head during such installation and a fluid flow through an orifice therein in a direction opposite to that which it will enjoy in use by the provision of a non-return valve at said orifice.
The invention will be more fully understood from the following description given by way of example only with reference to the figures of the accompanying drawing in which:
Figure 1 is a side elevation of an apparatus for circulating and gasifying a liquid and
Figure 1A is an enlargement of a part only of that apparatus as indicated.
Figures 2A, 2B and 2C show seriatim to a larger scale a front view of a non-return valve and two side elevations in diametral section on the section station 1111 of Figure 2A when the said valve is closed and the said valve is open.
Referring now to the Figures of the drawing apparatus for circulating and gasifying a liquid is shown generally at 10. Air enters by the pipe 11 as shown by arrow 12 and comes out in operational use of orifice 13. Let us know consider the installation of apparatus 10 at a fully immersed position below the surface W1 of sludge water w at a depth of h feet prior to the connection of air supply 12. Orifice 13 is subjected to a hydrostatic pressure head h and a flow of sludge water will take place in a direction in contradistinction to the direction of the air that in use will be emitted from it. Any foreign matter entrained in the flow of sludge water will enter orifice 13 and may block it since orifice 13 in one example is but 6 mm in diameter.To prevent such a blocking of said orifice 13 we provide, as shown in Figure 1A, a nonreturn valve 13A drawn to a larger scale in Figures 2A, 2B and 2C.
Non-return valve 13A comprises an outer ring 1 3r, a diaphragm 132 and bolts 133 around the periphery of the diaphragm 132 and ring 131. The diaphragm 132 has a number of holes 134 outside of the open area 1 3, of the orifice 13.
The modus operandi is elementary yet efficacious; in Figure 2B at installation pressure head h, generates a flow of sludge water indicated by arrow S1 and diaphragm 132 acts as an obturator and closes onto orifice 13, the holes 134 being blocked. After installation at depth h and air line 11 being supplied with air 12 diaphragm 132 opens (Figure 2C) to allow airto escape from orifice 13 via holes 134. We prefer to make the diaphragm 132 of rubber and all other parts of non-metallic or non-corrosive materials since the valve has to operate for long periods without maintenance.
1. In apparatus that is to be installed in a fluid and thereby subjected to a pressure head during such installation and a fluid flow through an orifice therein in a direction opposite to that which it will enjoy in use, the provision of a non-return valve at said orifice.
2. Apparatus according to claim 1 wherein the non-return valve is a diaphragm that acts as an obturator to said orifice and is retained by a peripheral ring, said diaphragm containing one or more holes placed outside the area of said orifice.
3. Apparatus according to claim 1 or claim 2 wherein the non-return valve is made wholly of rubber.
4. Apparatus constructed and adapted to operate substantially as hereinbefore described and as shown in the figures of the accompanying drawing.
**WARNING** end of DESC field may overlap start of CLMS **.
Claims (4)
1. In apparatus that is to be installed in a fluid and thereby subjected to a pressure head during such installation and a fluid flow through an orifice therein in a direction opposite to that which it will enjoy in use, the provision of a non-return valve at said orifice.
2. Apparatus according to claim 1 wherein the non-return valve is a diaphragm that acts as an obturator to said orifice and is retained by a peripheral ring, said diaphragm containing one or more holes placed outside the area of said orifice.
3. Apparatus according to claim 1 or claim 2 wherein the non-return valve is made wholly of rubber.
4. Apparatus constructed and adapted to operate substantially as hereinbefore described and as shown in the figures of the accompanying drawing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB7910767A GB2063694A (en) | 1979-11-26 | 1979-11-26 | Improvements in circulating and gasifying apparatus partly or wholly submerged in a fluid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB7910767A GB2063694A (en) | 1979-11-26 | 1979-11-26 | Improvements in circulating and gasifying apparatus partly or wholly submerged in a fluid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB2063694A true GB2063694A (en) | 1981-06-10 |
Family
ID=10509415
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB7910767A Withdrawn GB2063694A (en) | 1979-11-26 | 1979-11-26 | Improvements in circulating and gasifying apparatus partly or wholly submerged in a fluid |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2063694A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1679112A1 (en) * | 2003-10-29 | 2006-07-12 | Anemos Company Ltd. | Air diffusing device |
-
1979
- 1979-11-26 GB GB7910767A patent/GB2063694A/en not_active Withdrawn
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1679112A1 (en) * | 2003-10-29 | 2006-07-12 | Anemos Company Ltd. | Air diffusing device |
| US7264231B2 (en) * | 2003-10-29 | 2007-09-04 | Anemos Company Ltd. | Diffused gas aeration apparatus |
| EP1679112A4 (en) * | 2003-10-29 | 2009-05-13 | Anemos Company Ltd | Air diffusing device |
| EP2095869A3 (en) * | 2003-10-29 | 2009-11-18 | Anemos Company Ltd. | Air diffusing device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |