As the front‑end feeding unit of a central pneumatic conveying system, the dust‑free feeding station directly influences the dust‑control performance, conveying stability and production safety of the whole set through its matching condition. Multiple key points shall be managed in system design, equipment connection, working‑condition adjustment, safety protection and daily maintenance.
First of all, match air volume and negative‑pressure parameters. The feeding station relies on slight internal negative pressure to contain dust during feeding. However, central pneumatic conveying continuously extracts materials from the bin, which tends to break the negative‑pressure balance inside the chamber and result in dust leakage at the feeding port. The feeding bin shall maintain negative pressure at ‑500 Pa 【note: original text content truncated in source snippet】 to avoid dust‑explosion hazards.
Finally, implement regular maintenance. Periodically inspect ageing sealing components and the blade clearance of rotary valves, and clean powder adhering to filter elements as well as residual build‑up inside pipelines. When producing multiple material grades, thoroughly clean both the feeding station and conveying pipelines to prevent cross‑contamination. Keep routine records of system air pressure, air volume and pressure‑difference data. Fine‑tune operating parameters according to material moisture content and ambient temperature‑humidity. In this way, the two working conditions of feeding‑dedusting and pneumatic conveying can operate stably in long‑term coordination, ensuring both workshop cleanliness and continuous‑production efficiency.