Vertical Pressure Leaf Filter

Vertical pressure leaf filter is liquid filtration system consisting of many leaf-shaped filter elements that are stacked inside a vertical vessel.

Vertical pressure leaf filter has been specifically designed to provide a large filtration area which is made possible due to the shape of their filter leaf elements. These vertical pressure leaf filter systems produce high filtrate clarity after the clarification run. Different types of filter aids can be used in vertical pressure leaf filters to improve filtrate quality.

The SEPARATECH Vertical Pressure Leaf Filter (VPLF) is a highly efficient, hermetically sealed liquid-solid separation system engineered specifically for processing lines with restricted floor space. By utilizing vertical pressure vessels and multi-layer stainless steel leaf screens, the VPLF series delivers a massive filtration surface area within a remarkably compact footprint.

As a fully automated, clothless filtration solution, it completely eliminates the ongoing operational expenses, fabric blinding, and intense manual labor associated with traditional plate and frame filter presses. It stands as the premier choice for premium clarification in edible oil refining, alkyd resin processing, and hazardous chemical filtration.

Vertical Pressure Leaf Filters are ideal for solid-liquid separation & work on principle of precoating & pressure.

Pre-coating is done with the help of suitable filter aid about 0.5 to 1% (Bleaching earth, supercel, hyflo, superflo etc.) mixed with the liquid to be filtered. Unfiltered liquid is pumped into the filter vessel. Initially the filter aid starts forming a precoat layer on both sides of the filter leaves, until then cloudy material comes out of the filter. Once the layer is formed, pressure starts developing, restricting the impurities. Clear liquid flows from both sides into the leaves (filter elements), flows along the tubular channel & gets discharged from bottom of the leaf.

All the leaves are mounted on a common manifold. The leaves start getting choked on both the sides by impurities forming cake, which is in wet from. Once the leaves get choked completely, the pressure rises to 3 kg/cm2 & the output flow almost stops. This means the batch size is reached. The pump is stopped & steam / air pressure is applied from the top (without dropping the filter pressure) to filter the material around the leaves held up in the tank & to squeeze the cake further & reduce the liquid retention in it. The holdup unfiltered liquid in the conical portion is taken back.

Key Design Features & Footprint Advantages

The structural orientation of the Vertical Pressure Leaf Filter offers distinct engineering benefits for modern chemical and industrial plants:

• Minimal Floor Space Requirement: The vertical cylindrical design utilizes overhead vertical clearance rather than valuable shop floor layout, making it easy to integrate into existing skids.
• Hermetically Sealed Pressure Vessel: The top cover is tightly bolted or locked with a quick-opening hydraulic ring, preventing dangerous chemical vapors, odors, or hot liquids from leaking into the work environment.
• No Filter Cloth Consumables: The internal filter leaves act as a permanent filtration medium, eliminating product retention in fabrics and drastically lowering your Total Cost of Ownership (TCO).

The Pneumatic Vibrator Dry Cake Discharge System

One of the most critical engineering components of the SEPARATECH Vertical Pressure Leaf Filter is its automated dry cake discharge mechanism:

1. Cake Drying: After the filtration cycle finishes, compressed air, inert nitrogen (N2), or live steam is blown through the vessel to push out residual liquid, leaving a highly dewatered solid cake on the leaf surfaces.
2. Vibratory Release: The bottom large butterfly valve opens automatically. A heavy-duty, high-frequency pneumatic vibrator mounted at the top of the vessel activates, transmitting precise harmonic vibrations through the leaf manifold.
3. Clean Drop: The dried filter cake instantly detaches from the smooth stainless steel wire meshes and drops cleanly through the bottom discharge chute without requiring manual scraping.

Food and Beverage
– Juice
– Beer
– Sugar
– Vinegar
– Edible Oil
– Wine
– Vegetable Oil
– Sweeteners

Petro Refining
– Amine: MEA, DEA, TEG
– Catalyst Fines Removal
– Cooling Water
– Alkyd Resin

Metal Finishing
– Pickle Liquor
– Electrolyte
– Electrogalvanizing Solution
– Lithium Processing

Various
– Sodium Thiocyanate
– Sodium Hypochlorite
– Tallow
– Carbon Removal
– Condensate
– Catalyst Removal
– Sodium Hydroxide
– Sodium Silicate
– Biodiesel
– Chlor-Alkali
– Pharmaceutical

Mining
– Merrill Crowe Gold Recovery (Clarifiers)
– Soda Ash
– Pregnant Liquor (Solutions) – Copper, Nickel,
– Zinc, Molybdenum, Lead, Indium, Cobalt
– Carbon Fines Removal

Acid
– H2SO4
– HCL
– Nitric
– Phosphoric
– Terephthalic
– Stearic

Brine
– Brine KCL
– NaCl
– Chlorate
– Brine Muds

Molten Sulfur
– Dark sulfur
– light sulfur
– bright sulfur