CN106629959A - High-efficiency hydraulic air dissolving device used for dissolved air flotation - Google Patents
High-efficiency hydraulic air dissolving device used for dissolved air flotation Download PDFInfo
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- CN106629959A CN106629959A CN201710098801.XA CN201710098801A CN106629959A CN 106629959 A CN106629959 A CN 106629959A CN 201710098801 A CN201710098801 A CN 201710098801A CN 106629959 A CN106629959 A CN 106629959A
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- air
- dissolving
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- tank
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/24—Treatment of water, waste water, or sewage by flotation
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Physical Water Treatments (AREA)
Abstract
A high-efficiency hydraulic air dissolving device used for dissolved air flotation comprises a reflux pressure pump, a dissolved air tank, a hydraulic air mixer and a compressed air inlet control valve; a reflux pipe on an air floatation tank or air floatation column water outlet pipe is connected to an air dissolved water inlet of the dissolved air tank through the reflux pressure pump, and the dissolved air tank is connected with the inlet of the hydraulic air mixer arranged at the top part in the dissolved air tank; a pipe orifice connected with the compressed air inlet control valve through a compressed air pipeline is also formed in the top part of the dissolved air tank; the hydraulic air mixer is provided with a jet nozzle for jetting generated high-velocity water flow to a mixing throat pipe below; an air inlet used for sucking compressed air of the upper part of the dissolved air tank and communicating with the outside is formed in the junction of the jet nozzle and the throat pipe; the lower section of the throat pipe is a diffuser; a water knockout vessel is arranged below the diffuser; an exhaust port for exhausting dissolved water flow flowing downwards from the bottom part is formed in the dissolved air tank; and the exhaust port is connected to a dissolved air release device through the water outlet pipe. The high-efficiency hydraulic air dissolving device disclosed by the invention is low in power consumption, high in air dissolving efficiency and adjustable in reflux ratio, has simple air dissolving mode, and is automatically controlled in operation.
Description
Technical field
The present invention relates to environmentally friendly water treatment field, the molten gas dress of the particularly a kind of high-efficiency hydraulic air for air-dissolving air-float
Put.
Background technology
Air-float technology in sewage disposal using quite extensively, it both can as pretreatment unit in water treatment system,
Oily substance in water, suspension, colloid, even algae substances are removed by pneumatically supported method, water process is can be used for again
During elsewhere, the suspension gone in eliminating water may be also used in papermaking to ensure the stable operation of follow-up equipment or technique
And mining processing industry, reclaim valuable material.Its principle is exactly to be sticked on pollutant using air bubble, is produced and water
Difference in specific gravity, in the presence of buoyancy, makes a kind of isolation technics of water and pollutant physical separation.
What is be most widely used at present is part dissolved air flotation process（DAF）, but the following problem of generally existing：1）Return
Stream flow is bigger than normal, and typically all between 25～50%, the energy consumption of the force (forcing) pump that flows back is higher；2）The utilization rate of compressed air is relatively low, i.e.,
The dissolved efficiency of air is relatively low, and compressed air consumption is big；3）Undissolved air is carried in dissolving water outlet secretly, and they are directly entered
Flotation tank is easily destroyed the separating effect of flotation tank, and effluent quality fluctuation is larger.
The content of the invention
It is an object of the invention to provide a kind of high-efficiency hydraulic air air-dissolving apparatus for air-dissolving air-float, mainly solve
The technical problem existing for prior art is stated, its power consumption is low, the simple and molten gas efficiency high of molten gas mode, reflux ratio is adjustable,
Auto-controll operation.
For achieving the above object, the technical scheme is that：
A kind of high-efficiency hydraulic air air-dissolving apparatus for air-dissolving air-float, it is characterised in that:It includes backflow force (forcing) pump, molten gas
Tank, waterpower air mixer, compressed air air intake control valve；Wherein：
Return duct on flotation tank or air supporting tower outlet pipe is connected to the dissolved air water entrance of dissolving by the force (forcing) pump that flows back, and this is molten
Air water entrance is connected with the entrance of the waterpower air mixer installed in dissolving inner top；The top of the dissolving is also provided with logical
The mouth of pipe that overcompression air duct is connected with compressed air air intake control valve；The waterpower air mixer has the height that will be produced
The intersection of the nozzle of fast current directive lower section mixing trunnion, the nozzle and trunnion be provided with that several communicate with outside for inhaling
Enter the air admission hole of the compressed air on dissolving top；The diffusing opening lower section of the trunnion hypomere arranges water knockout drum；The dissolving bottom
The outlet that setting discharges the dissolved air water stream for flowing downward to bottom, the outlet is connected to molten gas release dress by outlet pipe
Put.
The high-efficiency hydraulic air air-dissolving apparatus for air-dissolving air-float, it is characterised in that:It is also included for controlling water
Speed and the level control unit of the time of staying that stream declines in dissolving；The level control unit includes being arranged on dissolving
On liquid level gauge liquid level gauge and the control valve that is arranged on dissolving outlet pipe.
The described high-efficiency hydraulic air air-dissolving apparatus for air-dissolving air-float, it is characterised in that:The level control unit control
The speed that current processed decline in dissolving is in 50～150m3/m2/ h, the time of staying is between 2～5min.
The described high-efficiency hydraulic air air-dissolving apparatus for air-dissolving air-float, it is characterised in that:On the compressed air piping
It is provided with compressed air air intake control valve.
The described high-efficiency hydraulic air air-dissolving apparatus for air-dissolving air-float, it is characterised in that:One is installed in the dissolving
Individual or multiple standard specification waterpower air mixers.
The described high-efficiency hydraulic air air-dissolving apparatus for air-dissolving air-float, it is characterised in that:The water knockout drum of the blender
External diameter more than more than 1 times of diffusing opening diameter.
The invention has the advantages that：
1st, apparatus of the present invention are dissolved under pressure the characteristic of water using compressed air, and jet current principle is utilized in dissolving
Compressed air is sufficiently mixed with pressure air-dissolving water, multiple-contact reaches the purpose of saturation, and ensures the dissolved air water in dissolving
It is completely separated with undissolved air, the dissolved air water for making outflow dissolving does not carry any undissolved bubble secretly.
2nd, the dissolved air water source of apparatus of the present invention is the water outlet of pneumatically supported part water outlet Jing backflows force (forcing) pump pressurization；Saturation it is molten
Air water is sent to molten gas release device after flowing out from the bottom of dissolving, dissolved air water is soluble in water Jing after release suddenly decompression
Air is discharged rapidly, forms countless small bubbles（30～50 μm）Uniformly mix with pending raw water, then together
Into flotation tank（Tower）, and stick on contaminant particle, realize that pollutant is separated with water in flotation tank.
3rd, it is of the invention in order to the dissolved air water after ensureing air and molten gas is completely separated, must keep relative in dissolving
The time of staying of the constant liquid level and dissolved air water in tank.For this purpose, also setting up a set of constant liquis position control unit.
Description of the drawings
Fig. 1 is the structural representation of the present invention.
In figure：1st, flow back force (forcing) pump；2nd, return flow meter；3rd, dissolving；4th, waterpower air mixer；5th, nozzle；6th, larynx
Pipe；7th, air inlet；8th, anemostat；9th, water knockout drum；10th, liquid level gauge；11st, fluid level control valve；12nd, pressure releaser；13rd, compress empty
Gas air intake control valve.
Specific embodiment
Fig. 1 is referred to, the invention discloses a kind of high-efficiency hydraulic air air-dissolving apparatus for air-dissolving air-float.As schemed
Show：It includes backflow force (forcing) pump 1, dissolving 3, waterpower air mixer 4, liquid level gauge 10, compressed air air intake control valve 13；Its
In：Return duct on flotation tank or air supporting tower outlet pipe is by the force (forcing) pump 1 that flows back（With return flow meter 2）It is connected to dissolving 3
Dissolved air water entrance, the dissolved air water entrance is connected with the entrance of waterpower air mixer 4 installed in the inner top of dissolving 3；Should
The top of dissolving 3 is also provided with the mouth of pipe being connected with compressed air air intake control valve 13 by compressed air piping；The waterpower
Air mixer 4 has the boundary of the nozzle 5 of the high-velocity flow directive lower section mixing trunnion 6 that will be produced, the nozzle 5 and trunnion 6
Place is provided with the air admission hole 7 for sucking the compressed air on the top of dissolving 3 that several are communicated with outside；The hypomere of trunnion 6
The lower section of diffusing opening 8 arranges water knockout drum 9；The lower section of dissolving 3 arranges the discharge for discharging the dissolved air water stream for flowing downward to bottom
Mouthful, the outlet is connected to molten gas release device 12 by outlet pipe.
Present invention additionally comprises for controlling speed and the Liquid level list of the time of staying that current decline in dissolving 3
Unit；To ensure that air and the dissolved air water after molten gas are completely separated, the liquid level and water of relative constancy must be kept in dissolving 3
The time of staying in dissolving.For this purpose, arranging a set of constant liquis position control unit.The level control unit includes being arranged on molten gas
Liquid level gauge liquid level gauge 10 on tank 3 and the control valve 11 being arranged on the outlet pipe of dissolving 3.The level control unit control water
The speed that stream declines in dissolving 3 is in 50～150m3/ m2/h, the time of staying is between 2～5min.
The present invention molten gas principle be：The characteristic of molten under pressure and water using compressed air, in dissolving 3
Compressed air is sufficiently mixed with pressure air-dissolving water in waterpower air mixer 4 using jet current principle, multiple-contact reaches full
The purpose of sum, efficient utilization compressed air, and ensure that dissolved air water and undissolved air are kept completely separate in dissolving 3, make stream
The dissolved air water for going out dissolving 3 does not carry any undissolved bubble secretly, and the dissolved air water source of apparatus of the present invention is pneumatically supported part water outlet
The water outlet of Jing backflow force (forcing) pumps 1.
The dissolved air water of close saturation reaches molten gas release device 12, dissolved air water warp knuckle stream from after the outflow of dissolving outlet at bottom
Suddenly after decompression, air soluble in water is discharged rapidly, forms countless small bubbles（30～50 μm）With it is pending
Raw water uniformly mixes, and flotation tank is then entered together（Tower）.
The specific work process of apparatus of the present invention is：
Flotation tank（Tower）The dissolved air water that part water outlet is sent to dissolving 3 after the force (forcing) pump 1 that flows back pressurizes as power water source enters
Mouthful, the entrance is connected with the entrance of the waterpower air mixer 4 installed in dissolving inner top.The top of dissolving is also provided with one
The individual mouth of pipe being connected with compressed air piping, by by compressed air air intake control valve 13 adjust the air after pressure be sent to it is molten
The top of gas tank 3.Backflow power water after pressurization initially enters the entrance of waterpower air mixer 4, and then power water is in waterpower
The mixing trunnion 6 of the lower section of high-velocity flow directive nozzle 5, the flow velocity of current mass flowing nozzle 5 are produced at the nozzle 5 of air mixer 4
Control is between 10～20m/s.In the presence of jet, nozzle 5 and the intersection of trunnion 6 can produce certain negative pressure.It is empty in waterpower
The nozzle 5 of gas blender 4 and the intersection of trunnion 6 are provided with several and outside identical air admission hole 7, in the presence of negative pressure,
The compressed air on the top of dissolving 3 is sucked, is mixed strongly in trunnion 6 with power water, then in the diffusing opening of the outlet of trunnion 6
8 eject, and after diffusing opening 8, the additional air without dissolving is separated from water air-water mixture, and dissolved air water impact position
On water knockout drum 9 below diffusing opening, water makes water contact again with the air of the internal upper part of dissolving 3 again to around sputtering, and reaches
To being substantially saturated after state, trickle down on the water surface in dissolving 3.The dissolved air water of saturation is in dissolving 3 with similar piston
Form progressively flow downward, in flow process further will likely without dissolving air be separated from water, air returns to molten
The internal upper part air chamber of gas tank 3, continues to be reused as source of the gas.Discharge the dissolved air water stream for flowing downward to the bottom of dissolving 3
Mouth is discharged to molten gas release device 12.In order to meet being completely separated for dissolved air water and insoluble air, the sky not dissolved is not carried secretly
Gas, the speed that control current decline in tank is in 50～150m3/m2/ h, the time of staying is in 2～5min.For this purpose, arranging a set of water
Level control device, it is by the liquid level gauge liquid level gauge 10 on dissolving 3 and the control valve being arranged on the outlet pipe of dissolving 3
Door 11 is constituted.The efficient waterpower air mixing device by more than, the air saturation of dissolved air water all can compress empty more than 95%
The consumption of gas is only processed between the 10～20% of the water yield than the relatively low and required recirculation water water yield, reduces power consumption,
Realize the purpose of energy-conservation.
In the present invention, one or more standard specification waterpower air mixers 4 can be installed in the dissolving 3, be easy to reply
The processing system that the water yield significantly changes.
In the present invention, the external diameter of the water knockout drum 9 of the blender is more than more than 1 times of the diameter of diffusing opening 8, it is to avoid waterpower air
The dissolved air water of the separated mistake that the outlet air water of blender 4 is directly impacted in dissolving 3.
Embodiment 1, capacity of returns is 5～10m3/ h high-efficiency hydraulic air-dissolving apparatus
It is exerted oneself as 10m by 13/ h, lift is the backflow force (forcing) pump of 0.6～0.7MPa（VFC）, one it is a diameter of
The dissolving of 500mm, 1 set exert oneself as 10m3The waterpower air mixing device of/h and Liquid level are constituted.Entered by compressed air
Pressure in gas control valve regulation dissolving is in 5～6 bar.When adjusting stop of the dissolved air water in dissolving by Liquid level
Between no less than be 3min；The diameter of the nozzle of waterpower air mixer is not more than 13mm, and the air saturation of dissolved air water water outlet will
More than 92%.
Embodiment 2, capacity of returns is 20～40m3/ h high-efficiency hydraulic air-dissolving apparatus
It is also to be exerted oneself as 40m by 13/ h, lift is the backflow force (forcing) pump of 0.6～0.7MPa（VFC）, a diameter
Exert oneself as 40m for the dissolving of 800mm, 1 set3The waterpower air mixing device of/h and Liquid level are constituted.By compressed air
Pressure in air intake control valve regulation dissolving is in 5～6 bar.By fluid level control device regulation dissolved air water in dissolving
It is 4min that the time of staying is no less than；The diameter of the nozzle of waterpower air mixer is not more than 20mm, and the air of dissolved air water water outlet is satisfied
Will be more than 95% with degree.
Embodiment 3, capacity of returns is 50～60m3/ h high-efficiency hydraulic air-dissolving apparatus
It is also to be exerted oneself as 60m by 13/ h, lift is the backflow force (forcing) pump of 0.6～0.7MPa（VFC）, a diameter
Exert oneself as 10～20m for the dissolving of 1200mm, 4 sets3The standard hydraulic air mixing device of/h and Liquid level are constituted, 4 sets
Waterpower air mixing device is divided to two groups of arrangements, can be with 2 operations, it is also possible to which 4 are run simultaneously, to meet different capacity of returns changes
Requirement.By the pressure in compressed air air intake control valve regulation dissolving in 4.5～5.5 bar.Filled by Liquid level
Put and adjust the time of staying of the dissolved air water in dissolving no less than being 4min, the air saturation of dissolved air water water outlet will be more than 95%.
In sum be only presently preferred embodiments of the present invention, not for limit the present invention practical range.It is i.e. all
The equivalence changes made according to the content of scope of the present invention patent and modification, all should be the technology category of the present invention.
Claims (6)
1. a kind of high-efficiency hydraulic air air-dissolving apparatus for air-dissolving air-float, it is characterised in that:It includes backflow force (forcing) pump（1）、
Dissolving（3）, waterpower air mixer（4）, compressed air air intake control valve（13）；Wherein：
Return duct on flotation tank or air supporting tower outlet pipe is by the force (forcing) pump that flows back（1）It is connected to dissolving（3）Dissolved air water enter
Mouthful, the dissolved air water entrance be arranged on dissolving（3）The waterpower air mixer of inner top（4）Entrance be connected；The dissolving
（3）Top be also provided with by compressed air piping and compressed air air intake control valve（13）The mouth of pipe being connected；The waterpower is empty
Gas blender（4）With the high-velocity flow directive lower section mixing trunnion that will be produced（6）Nozzle（5）, the nozzle（5）And trunnion
（6）Intersection be provided with that several communicate with outside for sucking dissolving（3）The air admission hole of top compression air（7）；Should
Trunnion（6）The diffusing opening of hypomere（8）Lower section arranges water knockout drum（9）；The dissolving（3）Lower section arranges the dissolved air water that will be flowed downward
The outlet discharged to bottom is flowed, the outlet is connected to molten gas release device by outlet pipe（12）.
2. the high-efficiency hydraulic air air-dissolving apparatus of air-dissolving air-float are used for according to claim 1, it is characterised in that:It also includes
For controlling current in dissolving（3）The speed of middle decline and the level control unit of the time of staying；The level control unit bag
Include installed in dissolving（3）On liquid level gauge liquid level gauge（10）Be arranged on dissolving（3）Outlet pipe on control valve
（11）.
3. high-efficiency hydraulic air air-dissolving apparatus for air-dissolving air-float according to claim 2, it is characterised in that:The liquid level
Control unit controls current in dissolving（3）The speed of middle decline is in 50～150m3/m2/ h, the time of staying is between 2～5min.
4. high-efficiency hydraulic air air-dissolving apparatus for air-dissolving air-float according to claim 1 or 2 or 3, it is characterised in that:
Compressed air air intake control valve is provided with the compressed air piping（13）.
5. high-efficiency hydraulic air air-dissolving apparatus for air-dissolving air-float according to claim 1 or 2 or 3, it is characterised in that:
The dissolving（3）It is interior that one or more standard specification waterpower air mixers can be installed（4）.
6. high-efficiency hydraulic air air-dissolving apparatus for air-dissolving air-float according to claim 1 or 2 or 3, it is characterised in that:
The water knockout drum of the blender（9）External diameter be more than diffusing opening（8）More than 1 times of diameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710098801.XA CN106629959A (en) | 2017-02-23 | 2017-02-23 | High-efficiency hydraulic air dissolving device used for dissolved air flotation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710098801.XA CN106629959A (en) | 2017-02-23 | 2017-02-23 | High-efficiency hydraulic air dissolving device used for dissolved air flotation |
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| Publication Number | Publication Date |
|---|---|
| CN106629959A true CN106629959A (en) | 2017-05-10 |
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ID=58844793
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710098801.XA Pending CN106629959A (en) | 2017-02-23 | 2017-02-23 | High-efficiency hydraulic air dissolving device used for dissolved air flotation |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108423735A (en) * | 2018-03-28 | 2018-08-21 | 广州博芳环保科技股份有限公司 | A kind of pressure air-dissolving tank |
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| CN2317934Y (en) * | 1996-11-27 | 1999-05-12 | 宜兴市水质处理设备厂 | Pressure-self-controlled dissolved-air water generator |
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| CN103693706A (en) * | 2013-12-27 | 2014-04-02 | 中国矿业大学(北京) | Air floatation device for treating ABS (acrylonitrile butadiene styrene) industrial wastewater |
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2017
- 2017-02-23 CN CN201710098801.XA patent/CN106629959A/en active Pending
Patent Citations (7)
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| CN2317934Y (en) * | 1996-11-27 | 1999-05-12 | 宜兴市水质处理设备厂 | Pressure-self-controlled dissolved-air water generator |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108423735A (en) * | 2018-03-28 | 2018-08-21 | 广州博芳环保科技股份有限公司 | A kind of pressure air-dissolving tank |
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