Hunan Yueyang Fly Ash Negative Pressure Conveying Project

Project Overview

This case study presents the fly ash negative pressure conveying project implemented in Yueyang, Hunan Province. The system was designed and supplied by Headpowder to address the client's material handling challenges at a local power generation facility. The project successfully replaced outdated mechanical conveying methods with a modern pneumatic solution, ensuring stable and efficient ash removal under continuous operation.

Client Challenges

The client faced several operational difficulties with their existing ash handling system. Frequent blockages in the traditional screw conveyor caused production downtime, while open transport led to severe fugitive dust emissions, posing health risks to workers and violating environmental regulations. High maintenance costs and inconsistent material flow further reduced overall plant efficiency. The client needed a closed, low-maintenance, and automated solution capable of handling fine fly ash over a medium distance without performance degradation.

Headpowder Solution

Headpowder deployed a customized negative pressure pneumatic conveying system tailored to the site conditions. The system uses a vacuum pump to create suction that draws fly ash from multiple collection points through sealed pipelines to a central silo. Key components include wear-resistant pipe bends, precise air control valves, and a PLC-based monitoring unit for real-time operation. The design eliminates dust leakage, reduces energy consumption compared to positive pressure systems, and requires minimal manual intervention. After commissioning, the system achieved stable material flow with a conveying rate matching the boiler output, lowering the client's maintenance expenses by over 40% and fully meeting local emission standards.