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Special issue丨Bioclear jet aerator, working principle and field case study

2020-03-19


Aerator is a necessary equipment for water supply and drainage aeration and oxygenation, aeration is a means of strong contact between air and water, the purpose of which is to dissolve oxygen in the air in water. It also has some other important functions such as mixing and stirring. Oxygen in the air is transferred to water through aeration, and oxygen is transferred from the gas phase to the liquid phase, which is the theory of mass transfer diffusion.
   
The specific methods are: reduce the size of bubbles, increase the number of bubbles, improve the disorder of the liquid, increase the installation depth of the aerator, and extend the contact time between the bubbles and the liquid. Aeration equipment is based on this practice and is widely used in sewage treatment, according to the use of methods can be divided into mechanical aeration and blast aeration.
   
Working principle of 100g jet aerator:
Using the principle of venturi tube, due to the drainage action of the jet near the air suction port to generate negative pressure, the air is sucked in, fully expanded in the negative pressure area, and is beaten into tiny bubbles by the high-speed power fluid, fully mixed in the mixing chamber, converted potential energy in the expansion chamber, and sprayed diagonally downward along the axial direction of the jet into the sewage tank.
 


 

Easy to install, energy-saving operation, capable of generating μm microbubbles. Maintenance-free, long service life, service diameter 9m, oxygenation efficiency 28-35%, suitable for deep water aeration.
 


 

A few notes:
Retaining wall setting → to prevent cavitation of the pump impeller caused by too many bubbles and too small;
Duct installation height and inclination → Prevent water backfilling caused by downtime;
Set the bracket → the aerator itself does not bear the force and torque (for PP material);
Connect the flange up and down to complete the installation;
After installation, the bottom of the pool is cleaned.
      
Application example: Before and after renovation

 


Performance parameters:
Aerator size: Φ400mm-Φ500mm
Service area: 64m²/pcs
Average aerator operating distance: 8 meters
Air flow: 45-65m³/h single nozzle
Oxygen utilization rate: (water depth 8m) 35%
Oxygenation capacity: 10-120KgO2/h
Theoretical power efficiency: 6.46-8.86KgO2/kwh
 


The 100g jet aerator has the following characteristics:
Produce tiny bubbles, up to μm level;
High oxygenation efficiency (8 meters water depth efficiency up to 35%), air-water ratio up to 4:1;
The maximum service diameter of a single device can reach 9m;
Energy saving, low investment cost of ancillary equipment;
Outstanding deep-water aeration performance saves land occupation;
With stirring function, good oxygenation and stirring effect, the whole aeration tank has no aeration dead angle;
Maintenance-free, not easy to block, allowing particles with a diameter of 15mm to pass through, suitable for various processes and pool type reactors, can be connected to external air sources, can also be self-priming and inhalation;
The required circulating liquid volume is 50% of that of conventional jet aerators and 70% of that of conventional jet aerators.

 

 

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