Fan idling

The options currently considered are: 1. Enhancing the self-locking function of the exhaust air valve； 2. Optimize process pipelines ； 3. Consider variable-frequency control. Are there any other good methods? I would appreciate suggestions from fellow sailors, thank you!

For this situation, the following solutions can be considered: 1. Install check valves: Install check valves on the outlet pipes of each fan. When the fan stops operating, the check valve closes automatically to prevent it from spinning idle driven by the running fan. 2. Install isolation valves: Install operable isolation valves on the connecting pipeline between the two fans. When one fan is operating, close the valve corresponding to the other fan to prevent air flow from starting the stopped fan. 3. Use an electronic control system: Install a control system that automatically cuts off the power to another fan or brakes it when one fan is in operation, thereby preventing it from running idly. 4. Modify the pipeline layout: Redesign the piping system by adding bypass structures to reduce direct airflow between the two fans. These methods can reduce the idling phenomenon of fans, save energy, and protect the equipment. .

Currently, there are stainless steel check valves with self-locking functionality installed on the fan’s outlet pipeline. However, due to the valve diameter of 1000 mm and the high wind pressure, the sealing performance of these valves is poor. Therefore, we are looking into whether there are any other more suitable solutions: handshake

Since the existing large-diameter check valves have poor sealing performance, the following improvement options can be considered: 1. Replace them with high-performance check valves: Look for check valves that are more suitable for high wind pressure environments, such as those with enhanced sealing capabilities. 2. Diversion design: The piping system is modified to implement a diversion scheme that effectively isolates the airflow from the outlets of the two fans, thereby reducing mutual interference at the source. 3. Install frequency converters: By equipping the fans with frequency-driven devices, the operating speed of the fans can be adjusted to precisely control their operation, thereby avoiding energy losses that occur during idling. 4. Install electric braking systems: Equip each fan with an electric braking system that activates automatically when the fan stops operating, thereby preventing the fan from idling due to the airflow in the ducts. Through the above methods, the problem of fan idling caused by poor sealing of the check valve can be effectively resolved. It also enhances the controllability and security of the system. .

Adding an automatic valve and motor interlock behind each one should work

Well, try to modify the pneumatic mechanism and add interlocks.

Valve problems should be addressed at the valve level; it is recommended to send a video to determine what the issue with such valves is and whether they are suitable for use. Furthermore, it is necessary to distinguish whether there are issues with this setup and configuration during the initial testing phase or if problems arise later on, in order to facilitate issue analysis for reference.

Thank you for the reminder, Haiyou. Previously, the air valve was removed for inspection, and it was found that the thickness of the valve plate was only 1 mm, with no reinforcing ribs on it. Moreover, since the diameter of the valve plate reached 1000 mm, deformation occurred at the edges, resulting in poor sealing. Defects resulting from the valve’s inherent design will be addressed later, and the actual performance will be evaluated at that time.

If it’s a valve plate of this type, it’s easy to handle; those who have the resources can thicken and reinforce it and manufacture it themselves. Changing to other valves will increase the cost.

Indeed, it is hoped that improving the reinforcement bars will resolve the sealing issue, as replacing the valve is indeed troublesome.