Guide To Horizontal Leaf Filter: Design, Operation, And Applications

Filtration Chamber (Shell)

• Designed as a horizontal cylindrical structure, made of stainless steel or carbon steel (with anti-corrosion lining).
• Both ends of the shell are equipped with quick-open flanges or hydraulic locking devices for easy installation, removal, and cleaning of filter leaves.

Filter Leaf Assembly 

• Consists of multiple vertically or horizontally arranged filter leaves, with filter cloth covering the surface.
• The filter leaves have a hollow internal structure connected to a liquid collection pipe for filtrate discharge.

Pressurization System 

• The filtration chamber is pressurized via a feed pump or compressed air to force liquid through the filter leaves, while solids are retained to form a filter cake.

Discharge System 

• The filter cake is detached from the filter leaves using vibration devices, reverse air blowing, or scrapers, and discharged through the bottom outlet.

Control System

• Automated models feature PLC control to regulate pressure, discharge cycles, and cleaning processes.

Working Principle of the horizontal pressure leaf filter

1. Feed Pressurization: The slurry is pumped into the sealed filtration chamber, where liquid passes through the filter leaves under pressure, and solids are retained on the surface.
2. Filter Cake Formation: Solids accumulate on the filter leaves, forming a cake. As resistance increases, pressure is maintained to ensure flow continuity.
3. Filtrate Collection: The filtered liquid is collected through internal channels in the filter leaves and discharged via the collection pipe.
4. Cake Discharge and Cleaning:

• Dry Discharge: The filter cake is dislodged using compressed air.
• Wet Discharge: Water rinsing is applied for sticky materials.

5. Cyclic Operation: After discharge, the system proceeds to the next filtration cycle.

Application Scope and Scenarios of horizontal pressure leaf filter

1. Chemical and New Materials Field

Application Scenarios:

• Large-scale chemical production (e.g: titanium dioxide slurry dewatering, PTA mother liquor recovery)
• New energy material processing (e.g: lithium battery cathode slurry dewatering, nanomaterial precision filtration)
• High-temperature/corrosive media (e.g: metallurgical ore slurry, strong acid leaching solutions)

2. Food and Biopharmaceutical Field

Application Scenarios: 

• High-flow food-grade filtration (e.g: starch saccharification liquid refining, yeast extract separation)
• Pharmaceutical biologics (e.g: antibiotic fermentation broth clarification, vaccine sterile filtration)
• High-hygiene-standard materials (e.g: dairy products, enzyme preparations)

3. Environmental Protection and Resource Recovery Field

Application Scenarios: 

• Municipal/industrial sludge deep dewatering.
• Hazardous waste treatment (e.g: heavy metal sludge, chemical waste residues)
• Precious metal recovery (e.g: spodumene ore slurry, rare earth smelting solutions)