Applications
Our innovative Vertical & Horizontal Pressure Leaf Filters are well known for e.g. Edible/vegetable Oils, Biofuel/diesel, Gelatin, Oleo chemical, Mining applications, metal plating bath filtering and Amine cleaning in the Oil & Gas market.
The pressure leaf filter is an enclosed filtration system and can be fully automated. This filter produces a high filtrate clarity after the clarification run and is also suitable for all kinds of filter aids. The regeneration time between the filtration cycles is short.
Vertical Pressure Leaf Filter（VPLF/Versis）
The pressure leaf filter is an enclosed filtration system and can be fully automated. This filter produces a high filtrate clarity after the clarification run and is also suitable for all kinds of filter aids. The regeneration time between the filtration cycles is short.
The pressure vessel is filled with solution. Each filter element is surrounded by solution. The solution is pressurized and the liquid is pushed through the filter cake and into the filter element.
The filtrate goes out of the filter through the filter outlet. The solid particles remain on the elements as a filter cake.
Make a precoat layer (optional) on the filter elements before starting a filtration cycle. Supply the solution (with added precoat aid) through the filter until the precoat layer has the correct thickness.
A filter cake is necessary to get a clear filtrate. The first filtrate will not be clear. Keep supplying solution to start building a filter cake. Filtration starts when the filter cake is of sufficient thickness and the filtrate becomes clear.
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A filtration cycle ends when you get the:
– maximum permitted pressure difference
– maximum design pressure
– maximum cake thickness.
At the end of a filtration cycle the contents of the pressure vessel are removed. The cake is dried with air, an inert gas or steam. After the pressure is released the bottom valve is opened. The vibrators start and shake the cake loose from the filter elements. The cake goes through the bottom valve.
Vertical Pressure Leaf Filter Advantages
1. High filtrate clarity
2. High yield low product losses
3. Large filtration area – small footprint (high headroom)
4. No filter cloth – no washing or cloth replacements
5. Totally enclosed operation – no contact with air/moisture
6. Positive pressure – no vacuum or lowered pressures necessary
7. Wet or dry cake discharge
8. Possible extraction of the filter cake within the filter
9. Easy to automate – operation with minimum labour
10. Fast and effective cleaning without manual interference.
11. Mechanically simple
12. Easy access to the filter leaves for maintenance or extra leaf cleaning
13. Intensive cleaning of filter medium is possible
14. Improved housekeeping
15. Steam heating optional
Typical Applications Vertical Pressure Leaf Filter
Dry cake discharge – Edible oils – Crude oil – Bleaching – Winterisation – Sulphur Wet cake discharge – Sugars – Water glass – Beer – Brine |  |
Technical parameters：
Model | filtration area (m2) | cake area (L) | capacity (T/h) | working pressure (Mpa) | working temp. (℃) | vessel volume (L) | weight (kg) | ||
oil | resin | beverage | |||||||
| NYB-2 | 2 | 30/td> | 0.4-0.7 | 1-1.5 | 1.5-3 | 0.4 | ≤150 | 150 | 350 |
| NYB-4 | 4 | 60 | 0.5-1.3 | 2-3 | 1.8-5.5 | 280 | 450 | ||
| NYB-7 | 7 | 105 | 1-1.85 | 3-6.5 | 3.8-7.5 | 450 | 700 | ||
| NYB-10 | 10 | 150 | 1.5-3.2 | 4-8 | 5-8 | 850 | 1000 | ||
| NYB-12 | 12 | 230 | 2-4.5 | 6-10 | 8-10 | 1100 | 1200 | ||
| NYB-15 | 15 | 300 | 3-4.5 | 7-13 | 12-18 | 1400 | 1400 | ||
| NYB-20 | 20 | 400 | 4-6.5 | 8-16 | 15-20 | 1700 | 1800 | ||
| NYB-25 | 25 | 500 | 5-7.5 | 11-20 | 18-25 | 2000 | 2100 | ||
| NYB-30 | 30 | 600 | 6-8.5 | 14-22 | 25-30 | 2400 | 2600 | ||
| NYB-35 | 35 | 700 | 7-9.5 | 16-27 | 30-45 | 2700 | 3100 | ||
| NYB-45 | 45 | 900 | 8-11.5 | 21-34 | 40-45 | 3300 | 3600 | ||
| NYB-50 | 50 | 1000 | 9-14 | 23-40 | 35-45 | 3850 | 4050 | ||
| NYB-60 | 60 | 1200 | 10-16 | 25-45 | 40-50 | 4550 | 4450 | ||
| NYB-80 | 80 | 1580 | 12-20 | 25-60 | 55-70 | 5850 | 5600 | ||
| NYB-90 | 90 | 1820 | 13-22 | 40-70 | 65-80 | 6750 | 6600 | ||
Vertical Pressure Leaf Filters are quite similar to the Horizontal Plate Filters except for the orientation of the filter elements which are vertical rather than horizontal. They are applied for the polishing slurries with very low solids content of 1-5% or for cake filtration with a solids concentration of 20-25%.
Just like the Horizontal Plate Filter the Vertical Leaf Filters are also very well suited for handling flammable, toxic and corrosive materials since they are autoclaved and designed for hazardous environments when high pressure and safe operation are required. Likewise, they may be readily jacketed for applications whenever hot or cold temperatures are to be preserved. These features are not possible on Filterpresses which require the opening of plates to the atmosphere and shifting them one by one to allow cake discharge at the end of each cycle.
The largest Leaf Filters in horizontal vessels have a filtration area of 150 m2 and vertical vessels 90 m2 both designed for an operating pressure of 6 bar.
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