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1. Common types of aeration equipment
The water treatment methods of different environments are not the same, and the types of aeration equipment used are also different. There are mainly the following types.
1.1 Blast aeration
The advantages of the aeration system are: the operation is relatively simple, the equipment is not complicated, and the degree of automation is high. At the same time, there are also many problems: the oxygen utilization rate of medium and large pore diffusion equipment is low; the microporous aeration equipment is easy to block; the aeration diaphragm is easy to tear.
1.2 Mechanical aeration
Mechanical aeration includes the inverted umbrella aerator and the rotating disc aerator. Compared with blast aeration equipment, the mechanical aeration system has obvious advantages: no need to build a blower room, fewer pipes and aeration heads to be laid, simpler installation, and lower cost investment; but there are also some problems to be solved: high energy consumption, low oxygen utilization rate, low adjustability, and high operation and maintenance cost.
2. Permanent magnet direct drive motor for the aerator
The inverted umbrella aerator directly driven by the permanent magnet motor has incomparable advantages in the application of sewage treatment engineering. The Permanent magnet synchronous motor with low design speed can directly drive the impeller, saving reducer structure. The system’s overall efficiency is high, noise and vibration are small, and operation is safer and more reliable. Assisted by a permanent magnet special control system and the huge advantages of energy saving and environmental protection, it has become the new trend of low-speed pump development.
The permanent magnet direct drive motor and its control system manufactured by Enneng company are composed of a low-speed high-power permanent magnet motor and a special control system for the permanent magnet motor. The system can be professionally customized according to the parameters and size requirements provided by customers.
Since the products use the latest electromagnetic optimization design and structure scheme, the motor performance is better with a compact structure. It has advantages of small size, lightweight, high torque density, high efficiency and power factor, good moisture-proof performance, low noise, low vibration, easy for installation, maintenance-free, high-cost performance and etc. It is suitable for all kinds of low-lift and high-flow hydraulic engineering applications.
In addition to the inverted umbrella aerator, the rotary disc aerator is another common sewage treatment equipment, which can also be supported by a permanent magnet direct drive motor.
3. The development prospect of aeration equipment in sewage treatment
Aeration equipment has become a key link in the treatment process of municipal sewage and industrial wastewater, and it is also receiving widespread attention. The requirements are increasingly intensified, followed by the replacement of aeration equipment. New material diaphragm aerators, elevating mixed-flow aerators, micro-nano aerators, etc. are also emerging, which greatly promotes water treatment. The development prospect of aeration equipment is broad, and the upgrading and development of products conform to the development needs of the society. During the promotion and use of aeration equipment, attention should be paid to the combination with the actual working environment to maximize the role of aeration equipment.
