CA2102172A1 - Gas injection method and apparatus - Google Patents
Gas injection method and apparatusInfo
- Publication number
- CA2102172A1 CA2102172A1 CA002102172A CA2102172A CA2102172A1 CA 2102172 A1 CA2102172 A1 CA 2102172A1 CA 002102172 A CA002102172 A CA 002102172A CA 2102172 A CA2102172 A CA 2102172A CA 2102172 A1 CA2102172 A1 CA 2102172A1
- Authority
- CA
- Canada
- Prior art keywords
- liquid
- gas
- valve
- gas supply
- vane
- 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.)
- Abandoned
Links
Classifications
-
- 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
- B01F25/3121—Injector mixers in conduits or tubes through which the main component flows with Venturi elements; Details thereof with additional mixing means other than injector mixers, e.g. screens, baffles or rotating elements
-
- 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
- B01F25/313—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced in the centre of the conduit
- B01F25/3131—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced in the centre of the conduit with additional mixing means other than injector mixers, e.g. screens, baffles or rotating elements
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Aeration Devices For Treatment Of Activated Polluted Sludge (AREA)
Abstract
GAS INJECTION METHOD AND APPARATUS
ABSTRACT OF THE DISCLOSURE
A method and apparatus for injecting gas into a liquid stream. The inside diameter of a conduit through which the liquid flows is reduced in a venturi section thereby creating a low pressure zone. A gas supply is exposed to the low pressure zone and gas from the gas supply is allowed to enter the liquid so as to mix therewith. The gas and liquid mixture is passed through an aerator to further reduce the size of the gas bubbles and thereby increase the surface area of the gas bubbles exposed to the liquid to enhance the reaction between the gas and the liquid.
ABSTRACT OF THE DISCLOSURE
A method and apparatus for injecting gas into a liquid stream. The inside diameter of a conduit through which the liquid flows is reduced in a venturi section thereby creating a low pressure zone. A gas supply is exposed to the low pressure zone and gas from the gas supply is allowed to enter the liquid so as to mix therewith. The gas and liquid mixture is passed through an aerator to further reduce the size of the gas bubbles and thereby increase the surface area of the gas bubbles exposed to the liquid to enhance the reaction between the gas and the liquid.
Description
? 21 ~2t 72 ~ ., ?.~
GAS INJECTION METHOD AND APPARATUS
INTRODUCTION
.~
This invention relates to a method of adding gas to a liquid and, more particularly, to a method and apparatus for introducing gas to a liquid which liquid and gas mixture is then passed through a static aeratorO
,.:
BACKGROUND OF THE INVENTIQN ' ., ~
In U.S. Patent 4,749,527 entitled STATIC AERATOR
and assigned to the same owner as the present application, there is disclosed a static aerator used to mix a gas and liquid. Such mixing is done, for example, to enhance liquid oxygenation of a liquid such as sewage effluent to enhance sewage breakdown. The method and apparatus disclosed in tha '527 patent improves the gas and liquid mixing. The use of the aerator according to the '527 patent creates rotational acceleration in the liquid by the helical blade of the aerator which increases as the liquid moves around the spiral as it traverses the liquid ~ ~ ;
conduit in which the aerator is located. As the acceleration increases, the pressure on the liquid likewise increases. This increases the absorbtion of the gas by thP liquid. Thus, for example, and in the case of ~;
oxygen, the oxygen absorption rate is increased which is bene~icial for many applications.
:
While the static aerator according to the '527 operates in a satisifactory manner, it has been found that the oxygenation rate of the liquid can be increased further by adding gas to the liquid upstream of the aerator and utilizing two specific techniques. In the first technique which is typically used for minute or smaller flows of liquid, a gas supply pipe is positioned 'I .
21~12~72 ' : - 2 -adjacent the upstream end of the aerator helically shaped vane and orifices are drilled in the pipe equidistant and longitudinally along the pipe for the distance of the vane and are located on opposite sides of the vane. This allows the gas to be emitted from the orifices in a uniform manner on both sides of the vane as the liquid passes by the supply pipe. It has been found that distributing gas to the liquid on both sides of the vane from orifices can substantially increase the rate of oxygenation over tha~ obtained from the simple introduction of oxygen upstream of the aerator.
The second technique is particularly useful for larger liquid flows. In the second technique, a venturi is located upstream from the helical vane of an aerator and, as the liquid flows through the venturi, a pressure ;
reduction occurs as is well known when the velocity of the liquid increases. The pressure reduction creates a low ~
pressure or suction area and a supply of oxygen gas is -provided at the suction area which then enters the liquid.
A ball and spring-loaded check valve is provided to prevent gas from being emitted by the supply pipe when -~
there is no liquid flow through the conduit.
~'''~''' ' '`~
GAS INJECTION METHOD AND APPARATUS
INTRODUCTION
.~
This invention relates to a method of adding gas to a liquid and, more particularly, to a method and apparatus for introducing gas to a liquid which liquid and gas mixture is then passed through a static aeratorO
,.:
BACKGROUND OF THE INVENTIQN ' ., ~
In U.S. Patent 4,749,527 entitled STATIC AERATOR
and assigned to the same owner as the present application, there is disclosed a static aerator used to mix a gas and liquid. Such mixing is done, for example, to enhance liquid oxygenation of a liquid such as sewage effluent to enhance sewage breakdown. The method and apparatus disclosed in tha '527 patent improves the gas and liquid mixing. The use of the aerator according to the '527 patent creates rotational acceleration in the liquid by the helical blade of the aerator which increases as the liquid moves around the spiral as it traverses the liquid ~ ~ ;
conduit in which the aerator is located. As the acceleration increases, the pressure on the liquid likewise increases. This increases the absorbtion of the gas by thP liquid. Thus, for example, and in the case of ~;
oxygen, the oxygen absorption rate is increased which is bene~icial for many applications.
:
While the static aerator according to the '527 operates in a satisifactory manner, it has been found that the oxygenation rate of the liquid can be increased further by adding gas to the liquid upstream of the aerator and utilizing two specific techniques. In the first technique which is typically used for minute or smaller flows of liquid, a gas supply pipe is positioned 'I .
21~12~72 ' : - 2 -adjacent the upstream end of the aerator helically shaped vane and orifices are drilled in the pipe equidistant and longitudinally along the pipe for the distance of the vane and are located on opposite sides of the vane. This allows the gas to be emitted from the orifices in a uniform manner on both sides of the vane as the liquid passes by the supply pipe. It has been found that distributing gas to the liquid on both sides of the vane from orifices can substantially increase the rate of oxygenation over tha~ obtained from the simple introduction of oxygen upstream of the aerator.
The second technique is particularly useful for larger liquid flows. In the second technique, a venturi is located upstream from the helical vane of an aerator and, as the liquid flows through the venturi, a pressure ;
reduction occurs as is well known when the velocity of the liquid increases. The pressure reduction creates a low ~
pressure or suction area and a supply of oxygen gas is -provided at the suction area which then enters the liquid.
A ball and spring-loaded check valve is provided to prevent gas from being emitted by the supply pipe when -~
there is no liquid flow through the conduit.
~'''~''' ' '`~
:~
According to one aspect of the invention, there is provided an apparatus for mixing gas with a liquid comprising a helical vane twisted about a longitudinal axis and being positioned in a conduit, said vane having an upstream end and a downstream end, a gas supply pipe located adjacent said upstream end of said helical vane and orifices located in said gas supply pipe on opposite -sides of said vane ko supply gas into a liquid travelling through said conduit, said orifices being located on opposite sides of said end of said vane.
:~
_ 3 _ 2~172 .. According to a further aspect of the invention, :~
there is provided a valve for inject:ing gas into a liquid ; upstream of the helical vane of an aerator, said valve comprising a venturi to increase the flow of said liqu.id and thereby creates a low pressure zone adjacent said venturi and a gas supply conduit allowing access to said . valve and said liquid adjacent said venturi.
According to yet a further aspect of the j; . .
invention, there is provided a method of mixing gas and liquid comprisins passing liquid through a venturi to ~.
create a low pressure zone, exposing a supply of gas to ~ :~
said low pressure zone adjacent said venturi, allowing . ~.
said low pressure zone to extract gas from said gas supply and passing said gas and liquid mixture through a helical vane of an aerator. ~ ~;
BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS
Specific embodiments of the invention will now be described, by way of example only, with the use of j.
drawings in which~
Figure 1 is an isometric diagrammatic view of 25 the helical vane of a static aerator according to that ..
disclosed in U.S. Patent 4,749,572; -~
Figure 2 is an isometric v.iew similar to that of Figure 1 but illustrating the gas supply pipe utilized to supply gas to liquid according to the invention;
Figure 3A illustrates the gas supply pipe and static aerator oP Figure 2 in plan:
' ~;
2102~2 .,, .~
::. 4 :
.~ .
Figure 3B is an enlarged plan view of the gas ~:
supply pipe and helical vane of the static aerator of Figure 3A; :
Figure 4A is a side view o~ a gas injection reactor valve according to a further embodiment of the ::-invention;
' ~
Figure 4B is a sectional view of the gas -~
10 injection reactor valve of Figure 4A; .
Figure 5 is a waste water treatment system utilizing the teachings of the present invention; and : :' Figure 6 is a view of the reactcr valve according to the invention located upstream of the aerator.
.:
DESCRIPTION OF SP_CIFIC ~MBODIMENT
Referring now to the drawings, a static aerator is generally illustrated at 10 in Fi.gure 1 and is of the same type static a~rator as that disclosed in U.S. Patent :~
4l749,527 (Rasmussen) and entitled STATIC AER~TOR. The static aerator 10 includes a helical vane 11 which curves about a longitudinal axis 12. As seen in Figure 3A the vane 11 twists through 360 and as the length of the ;~
static aerator 10 is traversed from upstream to :::
downstream, the angle of curvature of the helical vane 11 increases as seen in Figure l. The upstream end 13 of the vane ll and the downstream end 14 are elongate and :~
positioned substantially vertical as seen in Figures 1 and 2.
' ~
A gas supply pipe 20 (Figure 2) is connected to the upstream end 13 o~ the helical vane 11 of the aerator -:,;'.
: ~
.' r ~ !2~2~
: ~ _ 5 _ :
lo. The gas supply pipe 20 has a vertical axis 21 which is parallel with the vertical and elongate upstream end 13 of the helical vane ll. A plurality of orifices 22 are ~ :
positioned in the supply pipe 20. The orifices 22 are 5 located symmetrically on each side of the upstream end 13 :~
of the helical vane 11. As liquid 24 flows through the conduit 23 as seen in Figures 3A and 3B, the gas, such as oxygen, is supplied from the supply pipe 20 and enters into the liquid on both sides of the vertical end 13 of . 10 the helical vane 11. Thus, gas is distributed into the liquid 24 from the orifices 22 on both sides of the vertical elongate end of helical vane 11. Typically, the diameter of the orifices 22 are approximately 1/64 of an ::
inch. The gas supply pipe 20 has a diameter of ~ :
approximately 1/4 inch. The Figure 3 embodiment is typically used for smaller or minute liquid flow. ~ ~
, ~. .
A further embodiment of tha invention is ~
illustrated in Figures 4A and 4B. In this embodiment, the -`:
gas supply pipe 20 illustrated in Figures 2 and 3 i.s replaced with a gas supply pipe 30. The gas supply pipe 30 is connected to a reactor valve 31 and the reactor valve 31 is connected to conduit 23 (Figure 3A) immedia-tely upstream of the end of the helical vane 11 as illustrated in Figure 6. Liquid 32 flows through the reactor valve 31 and, before reaching the aerator 10, the liquid 32 encounters a venturi section generally illustrated at 33.
The venturi section 33 decreases the diameter of the inside circumference of the reactor valve 31 thereby increasing, the velocity of the liquid 32 in the valves 31. A low pressure or suction area adjacent to the outlet 34 of the gas supply pipe 30 is created. The gas supply pipe 30 further comprises a seal 40, a ball 41 and a spring 42 which, when there is no flow of liquid in the ` - 6 - 2 ~ 7 2 ~
reactor valve 31, is closed thereby preventing the escape of oxygen from the outlet 34 of the gas supply pipe 30.
, OPERATION
In operation and when liquid 32 flows in ;~;
reactor valve 31, the low pressure created at the outlet ::~
34 of the gas supply pipe 30 will be of a magnitude such that the ball 41 will move against compression spring 42 ~ ~;
and be removed from its seat on seal 40 thereby allowing gas such as oxygen to enter into the liquid 32 flowing :~
through the reactor valve 31. When flow is terminated, the vacuum at outlet 34 will cease, the ball 41 will return to its seat on seal 40 and the gas will no longer be emitted from outlet 34.
Referring to Figure 5, a septic tank and tile field waste system according to the invention is illustrated at 70 in a typical configuration. The static aerator 43 has a reactor valve 31 according to the invention connected upstream of the aerator 43. An oxygen supply conduit 44 is connected by way of a check valve 50 and a supply solenoid 51 to a source of oxygen such as an oxygen bottle 52. A septic tank 53 is located .
underground as is usual and the organic waste within the septic tank 53 is sub~ect to anaexobic bacterial breakdown within the septic tank 53. The effluent or waste water leaves septic tank 53 via outlet 5~ and enters into the well module 60. As the water level rises in the well , 30 module 60, the high wate~ level ("HW.~") is reached. A
switch tnot shown~ is activated and turns on pump 61 as well as solenoid valve 51. Pump 61 pumps the effluent through a pump discharge pipe 62 and the oxygen supply conduit 44 provides oxygen to the reactor valve 31 as has been described in association with the Figure 4A and Figure 4B embodiment. The oxygenated effluent with the ~ 7 ~ 2 ~ 7 2 oxygen dissolved in the waste water then travels through the static aerator 43 and is discharged ~rom a discharge pipe 63 to the tile field 64 ~not shown) with a desired portion being returned to the well module 60 as is 5 controlled by control valve 72 for recirculation. When `;
the liquid level in module 60 reaches the low water level ("LWL"), the pump 61 and the solenoid valve 51 will cease operationO In the event of a failure of the switch activated by the liquid reaching the high water level ("HWL"), an emergency overflow ("EO") is provided which will allow the effluent or waste water in module 60 to overf~ow under gravity. A suitable control apparatus is generally illustrated at 71 and is operable to power the ;~
solenoid 51 and the pump 61 thereby to provide oxygen to ~`~
the reactor valve 31 when effluent is pumped through the reactor valve 31~
:
While specific ~mbodiments of the invention are illustrated, such embodiments should be taken as examples of the invention only and not as limiting its scope. Many modifications will readily occur to those skilled in the art to which the invention relates. Accordingly, the invention should be limited only by the scope of the accompanying claims.
, 30
According to one aspect of the invention, there is provided an apparatus for mixing gas with a liquid comprising a helical vane twisted about a longitudinal axis and being positioned in a conduit, said vane having an upstream end and a downstream end, a gas supply pipe located adjacent said upstream end of said helical vane and orifices located in said gas supply pipe on opposite -sides of said vane ko supply gas into a liquid travelling through said conduit, said orifices being located on opposite sides of said end of said vane.
:~
_ 3 _ 2~172 .. According to a further aspect of the invention, :~
there is provided a valve for inject:ing gas into a liquid ; upstream of the helical vane of an aerator, said valve comprising a venturi to increase the flow of said liqu.id and thereby creates a low pressure zone adjacent said venturi and a gas supply conduit allowing access to said . valve and said liquid adjacent said venturi.
According to yet a further aspect of the j; . .
invention, there is provided a method of mixing gas and liquid comprisins passing liquid through a venturi to ~.
create a low pressure zone, exposing a supply of gas to ~ :~
said low pressure zone adjacent said venturi, allowing . ~.
said low pressure zone to extract gas from said gas supply and passing said gas and liquid mixture through a helical vane of an aerator. ~ ~;
BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS
Specific embodiments of the invention will now be described, by way of example only, with the use of j.
drawings in which~
Figure 1 is an isometric diagrammatic view of 25 the helical vane of a static aerator according to that ..
disclosed in U.S. Patent 4,749,572; -~
Figure 2 is an isometric v.iew similar to that of Figure 1 but illustrating the gas supply pipe utilized to supply gas to liquid according to the invention;
Figure 3A illustrates the gas supply pipe and static aerator oP Figure 2 in plan:
' ~;
2102~2 .,, .~
::. 4 :
.~ .
Figure 3B is an enlarged plan view of the gas ~:
supply pipe and helical vane of the static aerator of Figure 3A; :
Figure 4A is a side view o~ a gas injection reactor valve according to a further embodiment of the ::-invention;
' ~
Figure 4B is a sectional view of the gas -~
10 injection reactor valve of Figure 4A; .
Figure 5 is a waste water treatment system utilizing the teachings of the present invention; and : :' Figure 6 is a view of the reactcr valve according to the invention located upstream of the aerator.
.:
DESCRIPTION OF SP_CIFIC ~MBODIMENT
Referring now to the drawings, a static aerator is generally illustrated at 10 in Fi.gure 1 and is of the same type static a~rator as that disclosed in U.S. Patent :~
4l749,527 (Rasmussen) and entitled STATIC AER~TOR. The static aerator 10 includes a helical vane 11 which curves about a longitudinal axis 12. As seen in Figure 3A the vane 11 twists through 360 and as the length of the ;~
static aerator 10 is traversed from upstream to :::
downstream, the angle of curvature of the helical vane 11 increases as seen in Figure l. The upstream end 13 of the vane ll and the downstream end 14 are elongate and :~
positioned substantially vertical as seen in Figures 1 and 2.
' ~
A gas supply pipe 20 (Figure 2) is connected to the upstream end 13 o~ the helical vane 11 of the aerator -:,;'.
: ~
.' r ~ !2~2~
: ~ _ 5 _ :
lo. The gas supply pipe 20 has a vertical axis 21 which is parallel with the vertical and elongate upstream end 13 of the helical vane ll. A plurality of orifices 22 are ~ :
positioned in the supply pipe 20. The orifices 22 are 5 located symmetrically on each side of the upstream end 13 :~
of the helical vane 11. As liquid 24 flows through the conduit 23 as seen in Figures 3A and 3B, the gas, such as oxygen, is supplied from the supply pipe 20 and enters into the liquid on both sides of the vertical end 13 of . 10 the helical vane 11. Thus, gas is distributed into the liquid 24 from the orifices 22 on both sides of the vertical elongate end of helical vane 11. Typically, the diameter of the orifices 22 are approximately 1/64 of an ::
inch. The gas supply pipe 20 has a diameter of ~ :
approximately 1/4 inch. The Figure 3 embodiment is typically used for smaller or minute liquid flow. ~ ~
, ~. .
A further embodiment of tha invention is ~
illustrated in Figures 4A and 4B. In this embodiment, the -`:
gas supply pipe 20 illustrated in Figures 2 and 3 i.s replaced with a gas supply pipe 30. The gas supply pipe 30 is connected to a reactor valve 31 and the reactor valve 31 is connected to conduit 23 (Figure 3A) immedia-tely upstream of the end of the helical vane 11 as illustrated in Figure 6. Liquid 32 flows through the reactor valve 31 and, before reaching the aerator 10, the liquid 32 encounters a venturi section generally illustrated at 33.
The venturi section 33 decreases the diameter of the inside circumference of the reactor valve 31 thereby increasing, the velocity of the liquid 32 in the valves 31. A low pressure or suction area adjacent to the outlet 34 of the gas supply pipe 30 is created. The gas supply pipe 30 further comprises a seal 40, a ball 41 and a spring 42 which, when there is no flow of liquid in the ` - 6 - 2 ~ 7 2 ~
reactor valve 31, is closed thereby preventing the escape of oxygen from the outlet 34 of the gas supply pipe 30.
, OPERATION
In operation and when liquid 32 flows in ;~;
reactor valve 31, the low pressure created at the outlet ::~
34 of the gas supply pipe 30 will be of a magnitude such that the ball 41 will move against compression spring 42 ~ ~;
and be removed from its seat on seal 40 thereby allowing gas such as oxygen to enter into the liquid 32 flowing :~
through the reactor valve 31. When flow is terminated, the vacuum at outlet 34 will cease, the ball 41 will return to its seat on seal 40 and the gas will no longer be emitted from outlet 34.
Referring to Figure 5, a septic tank and tile field waste system according to the invention is illustrated at 70 in a typical configuration. The static aerator 43 has a reactor valve 31 according to the invention connected upstream of the aerator 43. An oxygen supply conduit 44 is connected by way of a check valve 50 and a supply solenoid 51 to a source of oxygen such as an oxygen bottle 52. A septic tank 53 is located .
underground as is usual and the organic waste within the septic tank 53 is sub~ect to anaexobic bacterial breakdown within the septic tank 53. The effluent or waste water leaves septic tank 53 via outlet 5~ and enters into the well module 60. As the water level rises in the well , 30 module 60, the high wate~ level ("HW.~") is reached. A
switch tnot shown~ is activated and turns on pump 61 as well as solenoid valve 51. Pump 61 pumps the effluent through a pump discharge pipe 62 and the oxygen supply conduit 44 provides oxygen to the reactor valve 31 as has been described in association with the Figure 4A and Figure 4B embodiment. The oxygenated effluent with the ~ 7 ~ 2 ~ 7 2 oxygen dissolved in the waste water then travels through the static aerator 43 and is discharged ~rom a discharge pipe 63 to the tile field 64 ~not shown) with a desired portion being returned to the well module 60 as is 5 controlled by control valve 72 for recirculation. When `;
the liquid level in module 60 reaches the low water level ("LWL"), the pump 61 and the solenoid valve 51 will cease operationO In the event of a failure of the switch activated by the liquid reaching the high water level ("HWL"), an emergency overflow ("EO") is provided which will allow the effluent or waste water in module 60 to overf~ow under gravity. A suitable control apparatus is generally illustrated at 71 and is operable to power the ;~
solenoid 51 and the pump 61 thereby to provide oxygen to ~`~
the reactor valve 31 when effluent is pumped through the reactor valve 31~
:
While specific ~mbodiments of the invention are illustrated, such embodiments should be taken as examples of the invention only and not as limiting its scope. Many modifications will readily occur to those skilled in the art to which the invention relates. Accordingly, the invention should be limited only by the scope of the accompanying claims.
, 30
Claims (8)
1. Apparatus for mixing gas with a liquid comprising a helical vane twisted about a longitudinal axis and being positioned in a conduit, said vane having an upstream end and a downstream end, a gas supply pipe located adjacent said upstream end of said helical vane and orifices located in said gas supply pipe on opposite sides of said vane to supply gas into a liquid travelling through said conduit, said orifices being located on opposite sides of said end of said vane.
2. Apparatus as in claim 1 wherein said end of said helical vane is elongate and said gas supply pipe and said elongate end are substantially vertical, said orifices being spaced vertically along said gas supply pipe.
3. Apparatus as in claim 2 wherein said gas supply pipe supplies oxygen to said liquid.
4. A valve for injecting gas into a liquid upstream of the helical vane of an aerator, said valve comprising a venturi to increase the flow of said liquid and thereby creates a low pressure zone adjacent said venturi and a gas supply conduit allowing access to said valve and said liquid adjacent said venturi.
5. A valve as in claim 4 wherein said gas supply conduit supplies oxygen to said valve and liquid.
6. A valve as in claim 5 and further including a check valve operably associated with said gas supply conduit.
7. A valve as in claim 6 wherein said check valve comprises a seal and a spring loaded ball biased to seat on said seal.
8. A method of mixing gas and liquid comprising passing liquid through a venturi to create a low pressure zone, exposing a supply of gas to said low pressure zone adjacent said venturi, allowing said low pressure zone to extract gas from said gas supply and passing said gas and liquid mixture through a helical vane of an aerator.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA002102172A CA2102172A1 (en) | 1993-11-01 | 1993-11-01 | Gas injection method and apparatus |
| AU79881/94A AU7988194A (en) | 1993-11-01 | 1994-11-01 | Gas injection method and apparatus |
| PCT/CA1994/000595 WO1995012452A2 (en) | 1993-11-01 | 1994-11-01 | Gas injection method and apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA002102172A CA2102172A1 (en) | 1993-11-01 | 1993-11-01 | Gas injection method and apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2102172A1 true CA2102172A1 (en) | 1995-05-02 |
Family
ID=4152054
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002102172A Abandoned CA2102172A1 (en) | 1993-11-01 | 1993-11-01 | Gas injection method and apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2102172A1 (en) |
-
1993
- 1993-11-01 CA CA002102172A patent/CA2102172A1/en not_active Abandoned
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US3671022A (en) | Method and apparatus for the microdispersion of oxygen in water | |
| US7156377B2 (en) | Water aeration device and method | |
| US5674312A (en) | Injection of soluble gas in a liquid stream and removal of residual undissolved gas | |
| US6464210B1 (en) | Fluid dissolution apparatus | |
| KR101246688B1 (en) | The Micro jet pump for wastewater treatment | |
| CA1259304A (en) | Motionless mixer for gas/liquid mixing | |
| US4911836A (en) | Submerged aeration system | |
| US20020163089A1 (en) | Aerator and wastewater treatment system | |
| KR101371366B1 (en) | Apparatus for generating micro bubble and lake purification apparatus having the same | |
| KR100830800B1 (en) | High output ozonating apparatus | |
| US4389312A (en) | Variable venturi sewerage aerator | |
| US3734850A (en) | Wastewater treatment system | |
| US6986506B2 (en) | Water aerator and method of using same | |
| US5340382A (en) | Acid gas absorption process | |
| CA2102172A1 (en) | Gas injection method and apparatus | |
| WO1995012452A2 (en) | Gas injection method and apparatus | |
| CN110217903A (en) | A kind of micro-nano bubble generator of Self inhaling type | |
| KR100679876B1 (en) | A gas liquefaction-reaction equipment | |
| US4722785A (en) | Partial or non-barriered oxidation ditch having momentum conservation and increased oxygen transfer efficiency | |
| US4512887A (en) | Chlorine injector for treatment of effluent | |
| SU1549929A1 (en) | Device for aeration of waste water | |
| SU1777943A1 (en) | Aerator-mixer | |
| EP0039204B1 (en) | Devices for the gasification of liquids and liquid treatment plants including said devices | |
| KR100541001B1 (en) | Pond-purification system | |
| EP0602762B1 (en) | Apparatus for dissolving gas in a liquid |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Discontinued |