What are the characteristics and advantages of air suspension blower in sewage treatment field?

The air suspension blower is a kind of blower adopting air bearing technology. The high-efficiency impeller is directly driven by air suspension bearing and high-speed permanent magnet motor, and the rotor can run without contact and friction. In recent years, it has been widely used in the fields of municipal sewage treatment and industrial wastewater treatment, and is gradually becoming an upgraded alternative to the traditional roots blower and multi-stage centrifugal blower. Its many characteristics and advantages are worthy of in-depth understanding.

From the structural principle, the air suspension blower highly integrates high-speed permanent magnet synchronous motor, air bearing and efficient three-dimensional flow impeller. The rotor is suspended on the bearing film formed by compressed air, and there is no mechanical contact during operation, thus eliminating the traditional transmission components such as gears, mechanical bearings and couplings. This fundamental difference in structure directly brings outstanding features in operation, energy saving and maintenance.

The first is high efficiency and low energy consumption. In a sewage treatment plant, the energy consumption of biochemical aeration usually accounts for 50% to 70% of the total energy consumption of the whole plant, and the blower is the core energy consumption equipment of the aeration system. The air suspension blower adopts high-speed permanent magnet motor and high-efficiency three-dimensional flow impeller, and the overall efficiency can generally reach more than 80%. Compared with the traditional Roots blower or ordinary multi-stage centrifugal blower, the power saving rate can usually reach 20% to 30%. Taking a sewage plant with a daily processing capacity of 100,000 tons as an example, the annual electricity saving is considerable, and the energy saving benefit is very obvious. At the same time, its stepless frequency conversion speed regulation ability enables the air volume to be adjusted in real time with the actual oxygen demand, avoiding the phenomenon of "big horse-drawn car" that often occurs in traditional equipment, and further reducing the unit treatment cost.

Followed by low noise and low vibration. Because of the air suspension bearing, there is no mechanical contact between the rotor and stator, and the whole machine runs smoothly. The noise level can generally be controlled below 70 decibels to 80 decibels, which is far lower than traditional equipment such as roots blower. Sewage plants are often located near residential areas, or are arranged underground or semi-underground. Low noise characteristics are of great significance for improving the acoustic environment of the factory and its surrounding areas, reducing complaints about disturbing people, and saving a lot of investment in sound insulation and noise reduction facilities.

The third is compact structure, small floor space and flexible installation. The air suspension blower is highly integrated, and the volume and weight of a single device is much smaller than that of a Roots blower or a multistage centrifugal blower with the same air volume, and there is no need for a huge concrete foundation base and a supporting lubricating oil station. It can be arranged in a skid-mounted and modular way, which is very suitable for sewage plants with tight land use and is also convenient for underground sewage plants and various reconstruction and expansion projects.

The fourth is simple maintenance and long service life. Because there is no gear, no oil lubrication system and no mechanical contact wear, there is almost no need to replace lubricating oil, gears and bearings in daily operation, and the maintenance workload is greatly reduced. Equipment is generally equipped with self-diagnosis and remote monitoring system, which can monitor bearing clearance, temperature, vibration and other key parameters in real time, realize predictive maintenance, and warn abnormalities in advance. Its design service life is long, spare parts consumption is low, and the comprehensive maintenance cost is significantly lower than that of traditional fans.

The fifth is the high degree of automation and intelligence. Air suspension blower usually has built-in PLC control system and touch screen man-machine interface, which can be linked with automatic control platform and online dissolved oxygen instrument of sewage plant, automatically adjust air volume and pressure according to process requirements, and realize accurate aeration control. This not only improves the stability of system operation, but also provides a solid hardware foundation for smart water construction and unattended operation.

In terms of application advantages, air suspension blower is especially suitable for municipal sewage plants and various industrial wastewater treatment projects with large fluctuation of aeration rate and high requirements for energy saving and operating environment. Its wide regulation ratio and fast response ability can well adapt to the stage change of water intake load and ensure the stable effluent quality to meet the standard. At the same time, the operation data can be transmitted remotely and managed centrally, which is convenient for group, multi-factory unified scheduling and energy consumption assessment.

Of course, the air suspension blower has certain requirements for the cleanliness of the inhaled air, and it needs to be equipped with an efficient filtering device. The initial investment is relatively high, and it is more suitable for scenes that pay attention to long-term energy-saving benefits and operating quality. On the whole, its comprehensive advantages in energy saving, quietness, maintenance-free and intelligence are highly consistent with the development direction of green and low-carbon sewage treatment industry, reducing costs and increasing efficiency, and it is one of the preferred equipment for energy-saving upgrading and equipment transformation of aeration system.