What is the difference between Roots blower and rotary blower in sewage treatment

Roots blower and rotary blower can be used in sewage treatment; However, their different sewage treatment capacities differ greatly in use. The rotary fan is mainly aimed at integrated sewage treatment, and it is aimed at aeration of some small sewage tanks! The air volume of Roots blower is much larger than that of rotary blower, so it is aimed at places with relatively large sewage treatment capacity and workload!

So you must be wondering why you don't use Roots blower directly, which has a strong processing ability! Here, I need to tell you that each type of fan has its own advantages, while the advantage of rotary fan is that it has low noise, which is better than Roots fan! In some hospitals, laboratories, including aquaculture plants! In certain situations, it is necessary to use a fan with low noise! Otherwise, it would be a bit of a nuisance

We will compare the differences between them through several aspects.

1： Principle level comparison

The principle and structure of the rotary fan are exquisite, Blower pressure range: 0.1-0.5kgf/cm ". It is mainly composed of the following six parts: motor, air filter, blower body, air chamber, base (also used as oil tank) , drip nozzle. The blower operates eccentrically with a biased rotor inside the casing, and changes the volume between the blades in the rotor slot to suck in, compress, and eject air. During operation, the pressure difference of the blower is used to automatically send lubricating oil to the oil drip nozzle, which drips into the cylinder to reduce friction and noise, while keeping the gas in the casing from flowing back.

 Principle of Roots blower: The blower housing is equipped with two sets of three blade impellers, which are driven by a pair of synchronous gears to reciprocate in the opposite direction. The volume of the air inlet is V1, resulting in low pressure due to the rotation of the impeller. At the same time, the volume of the intake air is V2, resulting in high pressure gas generated by the increased resistance of the air outlet, thereby sending out air; Due to a certain gap between the impellers and between the impeller and the casing, there is no friction, so it can be operated for a long time. The following describes the key points of the spiral shape of this fan.

2： Maintenance Comparison

For the later maintenance of the rotary fan, it is necessary to regularly check whether the oil tank is short of oil every month, and the rotary fan needs to be regularly refueled! Make sure that the oil in the tank remains oily at all times! Avoid oil shortage, as once the rotary fan is short of oil, it is prone to failure, and in this regard, there is no resistance to construction of Roots blower! Compared to being fragile, the term "fragile" here does not mean that the quality of the machine is poor, but rather the characteristics of this machine! It is normal to operate for 5-6 years without oil shortage!

 The later maintenance of the Roots blower is relatively simple. It only needs to be refueled once every 4-6 months to ensure that the grease on the left gear of the machine is not lacking, and that the oil tank on the right side remains oiled. The good thing is that even if the Roots blower operates for 1-2 months without oil, it will still have major faults and the machine will not break down!

Through the comparison of the above aspects, I believe you have a simple understanding of these two types of fans, and you can choose the machine and model based on your own situation in use!

3： Characteristics of rotary blower

Small size, large air volume, low noise, and low energy consumption (rotary fans use the principle of operating compressed air, although small in size, but large in air volume, energy saving, and silent operation are unmatched by other types of fans). They operate smoothly and are easy to install (small models can operate with minimal vibration as long as they are properly placed, and there is no need to install shockproof devices, which is convenient to install) and resist load changes, The air volume is stable (for example, if the pressure of the sewage treatment aeration tank changes, the load changes, but the air volume changes slightly with the pressure change).