Your Challenges
Preventing filter element clogging
In demanding industrial applications, filtration elements can clog quickly without proper protection. A dedicated precoat layer helps protect the element surface, supporting stable operation and extending equipment service life.
Maintaining fine‑filtration performance
Lean amines, saturated brine, and turbine condensate streams require reliable fine filtration. A stable precoat layer ensures consistent filtration efficiency throughout the operating cycle.
Managing backwash and discharge requirements
Backwash and discharge methods vary by application. Some processes require slurry discharge, while others use dry discharge with a drying gas stream for dry‑cake removal. The filtration system must match process and disposal requirements.
The Process
Precoat filters – candle type
Candle‑type systems use a vertical cylindrical vessel with a conical bottom. Filtering candles are mounted at the top on a horizontal nozzle sheet or collecting manifolds. Backwash procedures depend on the application, and systems can be configured for slurry or dry discharge. Dry discharge includes a drying gas stream for dry‑cake removal.
Precoat filters – leaf type
Leaf‑type systems use a horizontal cylindrical vessel equipped with circular filtering leaves mounted on a central internal collecting header. The vertical round leaves filter inward on both sides and are supported by a central shaft that also collects the filtered liquid. During washing, the shaft rotates the leaves while a strong blade jet cleans them.
Your benefits
Stable filtration through precoat protection
Before filtration starts, a precoat slurry is introduced into the vessel, depositing a protective layer on the filter elements. This reduces element clogging and helps maintain fine‑filtration efficiency during operation.
Suitable for multiple industrial applications
Precoat filtration is well established for lean amine treatment, saturated brine handling in chlor‑alkali plants, and turbine condensate recovery, offering flexibility across different process conditions.
Flexible backwash and discharge options
Systems can be designed for slurry discharge or dry discharge, depending on application needs. Dry discharge uses a drying gas stream to support dry‑cake removal.
Two available configurations for maximum compatibility
Precoat filters are available in candle‑type or leaf‑type configurations. Both options are designed to support efficient cleaning and consistent fine‑filtration performance while adapting to different layouts and requirements.
