Aeration nozzle

Jet aeration is a method of aeration and oxygenation in the aerobic stage of wastewater treatment. Compared with other aeration methods such as microporous aeration, submersible aeration, and surface aerators, jet aeration is almost non clogging and requires almost no maintenance over a long service life. It can provide oxygen consistently, stably, and efficiently. At a specific water depth (8 meters), the oxygenation efficiency can reach 35%, greatly reducing operational energy consumption. Cost savings. Mainly used for supplying oxygen to aerobic tanks. Widely used in wastewater treatment in fields such as leather, pulp and paper, chemical, pharmaceutical, petrochemical, and food processing, such as various activated sludge processes, oxidation ditches, oxidation ponds, or 等R; And municipal sewage treatment and aerobic digestion of sludge; And denitrification and nitrification can be achieved by controlling the air supply volume.

It can also be used for mixing and stirring. Such as homogenization tank, regulation tank, selection tank, rapid mixing tank, gel feather tank, neutralization tank, chemical oxidation tank, disinfection tank, sludge storage tank, denitrification tank, chemical reaction tank, as well as gas extraction system and heat exchange system, etc.

Oxygen transfer rate

Gas is cut into extremely small bubbles by high-speed fluid impact, which is one of the reasons for high oxygen utilization efficiency. The turbulence generated by the jet aerator continuously updates the gas/liquid contact surface, which is also conducive to the transfer of oxygen.

The oxygen utilization rate (SOTR) measured by oxygenating anaerobic clean water with each aeration method at 20 degrees Celsius and one atmospheric pressure is the standard oxygen utilization rate, Standard Oxygen Transfer Rate ）,  When actual oxygenation is carried out in sewage, the large amount of salt, COD, and SS contained in the sewage can lead to a certain degree of decrease in the actual oxygen utilization rate. The alpha coefficient is a parameter that characterizes the magnitude of this decrease. For a given sewage, the alpha coefficient depends on the aeration device. Alpha is defined as the ratio of the oxygen utilization rate of a certain aeration device in a given sewage to the oxygen utilization rate in clean water. The alpha coefficient of microporous aeration is generally 0.4, while the alpha coefficient of jet aeration is as high as 0.95. This is mainly due to the strong jet fluid, which endows the gas with the energy to overcome the surface tension of sewage, making it easier for the gas to overcome the resistance of gas/liquid two-phase transfer.

Strong applicability

The oxygenation and mixing of the jet aerator can be controlled separately. Operators can adjust the amount of air according to the demand for dissolved oxygen, while mixing is achieved through circulating water. By combining manual control and DO instrument automatic control, the air supply can be turned off at low loads, effectively reducing energy consumption while maintaining the system to meet the load. Maintaining a mixed state even when gas supply is stopped is very suitable for anaerobic/aerobic alternating cycle biochemical treatment systems (such as 等R, CASS).

equipment installation 

The jet aeration system can mix thoroughly without covering the entire pool bottom, which can significantly save installation time and costs.

Waste gas and water mist

The jet aerator has high oxygen utilization rate and is installed at the bottom, so it will not produce water mist and foam like the surface aerator (surface aerator, rotary brush).

Equipment maintenance

The jet aeration system has a completely different working principle and structural characteristics from traditional aeration methods such as microporous aeration. Its high-strength jet main pipeline and strong wear-resistant nozzle make it maintenance free for life, and the excellent corrosion resistance of the PP material used can effectively avoid fracture, detachment, corrosion, and wear. In addition, there are no operating components in the pool, making it maintenance free for life. For high hardness, high salt, and high COD environments that often cause blockage and damage through micro pore aeration, the nozzle is the thinnest part of the entire jet aeration system, and this is the location of high-speed injection. The strong scouring effect prevents scaling and crystallization from forming.