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Venturi Injector
Venturi Injector
Venturi Injector is very efficient for mass transfer processes.
It has been widely used as an ideal equipment for aerations and ozone dosing purposes by customers of wastewater treatment.
Venturi Injector processes not only high oxygen/ozone transfer efficiency; but also some characteristics of corrosion prevention, free of clogging and fouling and silent operation.
So it is often adopted to deal with difficult wastewater such as high salinity influent.
Beside above utilization, Venturi Injector can be perform well in other mass transfer processes such as oxidation reaction, carbon dioxide addiction, material dosing and so on.
Venturi Injector provide water/wastewater industries with a new substitute to blower and mechanical aeration systems with the following advantages.
1. Higher oxygen transfer efficiency,less gas delivery required, low power consumption.
2. Simple pipeline,less facility space taking.
3. Less maintenance,no fouling factor in design.
4. Prolonged using life without performance decline.
5. Whisper operation.
6. Applicable to complete innovation installation without draining water from aeration pond/tank.
Models & Specifications:
| Type | INLET & OUTLET | SUCTION INLET | LENGTH(mm) | VOLUME OF FLOW(m3/h) | INLET PRESSURE(kgf/cm2 ) |
|---|---|---|---|---|---|
| GW200 | DN50 | DN50 | 267 | 7.5~33 | 0.35~7.03 |
| GW300 | DN80 | DN50 | 390 | 17~74 | 0.35~7.03 |
| GW400 | DN100 | DN50 | 551 | 30~103 | 0.35~4.22 |
| GW600 | DN125 | DN65 | 664 | 56~192 | 0.35~4.22 |
| GW800 | DN150 | DN65 | 766 | 82~303 | 0.35~4.92 |
| GW1200 | DN200 | DN100 | 1075 | 130~480 | 0.35~4.92 |
| GW3600 | DN300 | DN150 | 1576 | 274~1010 | 0.35~4.52 |
Primary injection
As illustrated by figures ,pressurized motive flow (red color) enters into a convergent nozzle in the injection chamber to form a high velocity jet stream, The vacuum produced by high velocity flow enable materials (blue color) to be suctioned into the chamber and enters into the motive flow, results in forming a new mix fluid (green color).The mixture flows through diffuser toward the out let with reducing velocity and increasing pressure.
Secondary ejection
the fluid mixture from injector ejects into the pond/tank/pipe line, drawing 4-5 times quantity of flow around it, resulting a second mix and a higher transfer efficiency of the suctioned substance.
The installation configuration of Venturi Injector is tailored to specific conditions of different customers. So the arrangements of Venturi Injectors with nozzles is always different from one to another.
Nevertheless,installation design can be classified into two kinds:
Dry-out installation
Installation works are carried out with no water in the pond. There are less pipeline needed for the plan.For new facilities and where the drain-out job can be done, empty-pond installation is suitable.
Water-in installation
installation work can be carried out without draining out the water from the ponds.This arrangement will facilitate the customers to fulfill their innovation project with no interruption of operation.
CFD simulation of gas-liquid mixing effect of Venturi Injector and working condition of suction port:
