Venturi Nozzle | Hydraulic Mixing Nozzle

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Venturi Nozzle (Hydraulic Mixing Nozzle)

Venturi nozzle is a common name for hydraulic mixing nozzles and mass transfer diffusion nozzles in industrial and water treatment projects. The three refer to the same type of fluid power equipment that uses liquid jets to achieve stirring and mixing. The "Venturi nozzles" in this article all refer to the hydraulic mixing/mass transfer diffusion nozzle products provided by Chengdu Green Water Technology.

Venturi nozzle (hydraulic mixing nozzle) is a fluid mixing device that uses pressure liquid as power. The pressure energy of the high-pressure liquid is converted into kinetic energy at the nozzle and sprayed at high speed. The high-speed jet drives the liquid around the nozzle that is equivalent to 3 to 5 times the flow rate of the sprayed liquid to flow together, and finally achieves uniform mixing in the pool.

Product picture

Principle of hydraulic mixing

The hydraulic mixing of the Venturi nozzle is based on the principles of jet entrainment and momentum transfer, and is in the same vein as the Venturi effect - utilizing the velocity changes in the contraction-expansion flow channel to achieve energy conversion and fluid ejection.

Mixing process:

1. The high-pressure liquid is pumped into the Venturi nozzle, and the pressure energy at the nozzle is converted into high-speed kinetic energy.

2. The high-speed jet is ejected from the nozzle and entrains the surrounding liquid, driving 3 to 5 times the flow rate of the liquid in the pool to move together.

3. Momentum exchange occurs between the jet and the surrounding liquid, forming a large-scale circulating flow field.

4. The circulating flow field fully mixes the liquid (or liquid-solid mixture) in the pool to achieve uniform mixing.

Venturi nozzles have no moving parts, simple structure, and stable operation. They can be designed according to the mixing speed/energy consumption requirements of different projects, and can be well adapted to the mixing needs of liquids (liquid-solid mixtures) of various sizes and any liquid level depth.

Dual action of Venturi nozzle

After the hydraulic mixing nozzle is used in the Venturi injector, the remaining pressure at the injector outlet is used for injection, which can simultaneously achieve hydraulic mixing and enhanced gas-liquid mass transfer:

1. Secondary mass transfer
The concentration difference between the mixed liquid at the ejector outlet and the liquid in the pool is used to perform secondary mass transfer to improve the gas-liquid two-phase mass transfer efficiency.

2. Hydraulic mixing
The remaining pressure head is used to complete the process of mixing the liquid in the pool evenly without additional power.

Core advantages

No mechanical rotating parts
It is driven by pure fluid power and has no wearing parts such as bearings and seals, so the failure rate is extremely low.

No scaling or clogging
The flow channel is smooth, almost no daily maintenance is required, and the maintenance cost is extremely low.

Flexible layout and installation
It can be flexibly arranged according to the pool type and liquid level depth to adapt to pools of various sizes.

Adapt to special working conditions
It is suitable for situations where it is difficult for traditional mechanical agitators to operate stably, such as corrosive environments, radiation hazards, and deep liquid levels.

Venturi nozzle model parameters

Model	Inlet	Working flow (m³/h)	Service width (m)	Service length (m)
N20	DN50	4.7～12.6	≤1.5	3～7
N30	DN80	10.7～28.3	≤2	3～7
N40	DN100	19.0～50.2	≤2.5	3～7
N50	DN100	29.7～78.5	≤2.5	3～7
N60	DN150	42.7～113.1	≤3	3～7
N70	DN150	58～154	≤3.5	3～7

Application areas

Field	Typical applications
Water treatment	Mixing of liquids in regulating tanks, reaction tanks, and sedimentation tanks
Aerobic biochemistry	Cooperate with jet aerator to achieve in-pool mixing after oxygenation
Ozone oxidation	Hydraulic mixing and mass transfer diffusion in ozone contact tank
Chemical industry	Mixing of liquids and liquid-solid mixtures in reactors and storage tanks
Special working conditions	Corrosive media, radiation environment, deep liquid level pool

FAQ

What is the difference between a Venturi nozzle and a hydraulic mixing nozzle?

In engineering applications, Venturi nozzles usually refer to hydraulic mixing nozzles. Because its nozzle structure is based on the Venturi effect and uses jet entrainment to achieve mixing, it is called a Venturi nozzle.

How does a Venturi nozzle achieve hydraulic mixing?

The high-pressure liquid accelerates through the nozzle to form a high-speed jet, entraining 3 to 5 times the flow rate of liquid around it to flow together, forming a circulating flow field in the pool through momentum exchange, and achieving uniform mixing without mechanical parts.

What are the advantages of a Venturi nozzle over a mechanical stirrer?

It has no moving parts, no scaling and clogging, extremely low maintenance costs, and flexible layout. It is especially suitable for situations with corrosive or radiation hazards or deep liquid levels. It is an irreplaceable choice for traditional mechanical agitators.

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