Installation and Commissioning Methods for Air-Suspended Fans in Wastewater Treatment Plants
Release date:
2022-02-05
Air-bearing centrifugal fans are a new type of centrifugal fan that has gained popularity in recent years. They do not require gearboxes, speed increasers, or couplings. Instead, the fan impeller is directly driven by a high-speed motor whose speed is regulated via a frequency converter. The shaft is suspended on an active air bearing, ensuring no physical contact and eliminating the need for a lubrication system. As a result, these fans boast high efficiency and long-term maintenance-free operation, making them increasingly popular among medium- and large-scale wastewater treatment plants. Now, let’s take a closer look at the installation and commissioning procedures for air-bearing centrifugal fans in wastewater treatment plants!
Air-bearing centrifugal fans are a new type of centrifugal fan that has gained popularity in recent years. They do not require gearboxes, speed increasers, or couplings. Instead, the fan impeller is directly driven by a high-speed motor whose speed is regulated by a frequency converter. The shaft is suspended on an active air bearing, ensuring no physical contact and eliminating the need for a lubrication system. As a result, these fans boast high efficiency and long-term maintenance-free operation, making them increasingly popular among medium- and large-scale wastewater treatment plants. Now, let’s take a closer look at them together. Air suspension fan The installation and commissioning methods for wastewater treatment plants!
Air Suspension Fan Installation and Commissioning Preparation
Preparations Before Installing the Air-Suspended Fan: Before installing the fan, you must ensure that the following tasks have been completed.
1. Safety
Ensure that the fan is installed strictly in accordance with relevant national safety and health standards, verify that the installers hold professional qualification certificates, and rigorously comply with the site safety and civilized construction regulations of the wastewater treatment plant.
2. Basics
The air-bearing fan is installed on a cement surface with sufficient load-bearing capacity. The foundation surface should be smooth, and the flatness and levelness of the fan’s foundation are generally moderate, ensuring the stability of the fan’s main body during operation.
3. Unboxing inspection
Check whether the dimensions of the equipment packing list, fan motor, impeller, main body of the air-floating fan, pipe diameters, diffuser tubes, vent valves, silencers, and other components are consistent with the design.
Air suspension fan Preparation before operation
Before connecting the power, you must ensure that the following tasks have been completed:
Make sure that all main valves along the pipeline are fully open, especially the throttling valves on the pipeline above the blower. If the blower is started with the throttle valve closed, surge could cause significant damage to the blower.
Confirm that the air-suspended fan is energized and has selected the correct operating mode.
Determine the operating conditions for starting the air-suspended fan.
Predict the aeration tank water level, pipeline valve opening status, load pressure, and required air flow rate, and select the operating point at startup from the performance curve diagram.
Air Main Pipeline Purging Plan for the Biological Pond
In Settings Air suspension fan When supplying air through the ducts, it is inevitable that foreign objects such as welding slag and small bricks will accumulate inside the ducts. These foreign objects—especially stainless steel welding slag—can cause serious damage to the diffusers exposed at the bottom of the biological tank, impairing aeration efficiency and even causing the diffuser discs to fall off. Therefore, before the main air supply pipe for the biological tank is fully installed and the blowers are officially put into operation, it is essential to use the blowers to purge the air ducts between the blower outlet and the surface of the biological tank. The air ducts above the biological tank are equipped with numerous blind plates, which can be used precisely to blow away any debris remaining in the ducts.
When cleaning the pipeline, please pay attention to the following:
Ensure that all mainline pipeline valves above the biological pond and leading to the bottom of the pond are closed to prevent debris from being blown into the aeration tank.
Alternately purge the two series of the biological tank to ensure that all main pipelines are thoroughly purged with no dead spots.
Ensure that the air suspension blower is fully open to provide sufficient blowing force, ensuring that heavier debris can be effectively blown away from the blind flange. Common faults of air suspension blowers.
Air-bearing fans should be equipped with a sufficient number of fault display codes. All possible malfunctions of the equipment will be displayed on the screen; simply follow the on-screen instructions or call the manufacturer’s hotline to resolve the issue.
Currently, the state requires cities at the county level and above to build municipal wastewater treatment plants, and it is becoming a general trend for these plants to adopt high-efficiency and durable fan-aeration equipment.
The above is an introduction to the installation and commissioning methods for air-bearing blowers in wastewater treatment plants. If you’d like to learn more, feel free to contact us anytime!
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