SubscribeScheibler Filters utilize the phenomenon of adsorption filtration to remove micronic and submicronic particles from liquid streams at minimal cost with minimal maintenance and fully automatic operation. Larger units are also expandable.
Operating Principle
The Scheibler Filter from Larox is used for the removal and recovery of solids in low concentration from process liquids. The quality of the resulting filtrate increases production capacity while boosting the quality of process
and products.
Scheibler Filters exploit the phenomena of adsorption filtration to cause micronic and sub-micronic particles to adhere to the fibres of the filter media, despite being small enough to pass through its pores. This reduces particle concentration in the filtrate to almost undetectable levels. Filter aids such as precoat and body feed are unnecessary in the vast majority of applications, but if required, the filter can be operated with filter aid without modification.
- All models feature a unique fully programmable cloth cleaning and cake discharge system.
- The filter is available with filtration areas up to 720 m2.
- The filters are available in corrosion resistant materials at high process temperatures.
Benefits
High Quality Filtration - adsorption filtration reduces particle concentrations in the existing liquid to a level of single digit parts per million. Production capacities increase in addition to the quality of plant and process end products.
Low Operation Costs - costly filter aids such as precoat and body feed are unneccessary in the vast majority of applications. This also considerably reduces the volume of total cake solids that may need to be disposed of to the environment. Low electrical energy consumption is another cost-saving benefit, because the adsorption process uses very low pumping pressures.
Minimal Maintenance Cost - with no moving parts, the operating cost typically equates to 1.25 cents (US) per m3 of filtrate produced. The unique cloth cleaning and cake discharge system ensures maximum cloth lifetimes. Normally the filter is only opened periodically to replace filter cloths.
Fully Automatic Operation - automatic (PLC) control of the cloth cleaning and cake discharge steps at the end of each filtration cycle ensures maximum filtration time in subsequent cycles. This also cuts manpower requirements by eliminating the need for frequent supervision.
High Capacity, Compact and Expandable - all Scheibler Filters occupy minimal building space. Flow rates as high as 600 m3/hr can be consistently handled by a single unit, greatly simplifying the process. The respective filtration areas of the double flanged D and E series can be expanded up to 360 m2 and 720 m2, economically accommodating capacity growth.
Chemical Process Industries
| 1. Filtration During normal operation the slurry is fed into the filter vessel through the process inlet by a centrifugal pump having maximum pressure of 300 kPa. It is very important to maintain laminar flow within the filter vessel to ensure adsorption filtration. |  | 4. Drain with Backwash & Air In this phase the filter vessel is drained through the drain outlet. Simultaneously, the filter cloth bags are backwashed and sprayed on the outside through the backwash inlet and the upper spray wash inlet. |  |
| 2. Draining In the beginning of the cloth cleaning and cake discharge cycle the filter liquid level is drained to the top of the filter elements. | 5. Drain with Wash & Sluice During the final draining phase the lower air sparge continues to keep the re-slurried filter cake in suspension and the lower sluice sprays direct solids towards the drain outlet, ensuring complete cake and slurry removal until the filter vessel is empty. | ||
| 3. Air Agitation In the agitation phase pressurised air at maximum 100 kPa is fed to the filtration vessel through a manifold below the filter elements. This causes vigorous bubbling and scouring of the filter cake attached to the filter cloth bag. During agitation the filter cake is removed from the filter cloth bag and efficient mixing causes the filter cake to be re-slurried. | 6. Cleaning Completed All the filter cake has been removed and the rejuvenated cloth is now ready for filtration again. The filter can now be refilled and the filtration cycle repeated. |  |
Scheibler A Series Polishing Filters
Designed with the Chemical Industry in mind the Scheibler A series filters produce higher cake solids concentrations (%w/w) for discharge than the C, D and E Series polishing filters because the cake solids settle in the conical bottom enabling multiple filtration cycles for a single wet cake discharge.
Greater capacity for higher feed solids concentration (%w/w) than the C, D and E Series polishing filters because the specialised pulsed cloth cleaning sequence enables shorter cloth cleaning cycles (reduced dead time).
Cost effective design resulting in the maximum filtration area for the vessel size.
Minimal installation space required due to vertical through-the-floor vessel configuration.
Employs the same adsorption filtration principle as in the C, D and E Series polishing filters.
| Type | A series | A4/6 | A6/6 | A6/10 | A10/10 | A13/15 | A15/15 |
| Effective filter area | m2 | 30 | 45 | 60 | 90 | 160 | 175 |
| Number of elements | 4 | 6 | 6 | 10 | 13 | 15 | |
| Height | mm | 3140 | 3438 | 3991 | |||
| Weight | kg | 2234 | 2373 | 2513 | 2652 | 2791 | 2931 |
| Width | mm | 1310 | 1580 | 2040 | |||
| Diameter | mm | 1108 | 1380 | 1812 | |||
| Inlet diameter | mm | 80NB | 100NB | 150NB | |||
| Max working pressure | kPa | 300- 600 | |||||
| Wash water | m3/cycle | 1.1 | 1.3 | 2.0 | 2.9 | 4.9 | 5.2 |
| Process air | Nm3/cycle | 40 | 56 | 75 | 107 | 176 | 192 |
Scheibler D, DD and E Series Filters
These filters are aimed at higher throuput applications especially in industries where there is potential for capacity growth.
The single flange Scheibler D Series Filters range from 80 m2 to 180 m2 in filtration area. The horizontal cylindrical design enables easy maintenance
access from floor level.
The Scheibler DD Series Filters range from 80 m2 to 360 m2 in filtration area. The horizontal configuration features a double flanged fixed head unit for expandable options and features easy retracting shell coverings.
The Scheibler E Series Filters range from 200 m2 to 720 m2 in filtration area. The larger horizontal cylindrical configuration generally requires small crane/hoist availability for routine element changes.
| D Series, Single Flange | DD Series, Double Flange | E Series | |||
| Non Expandable | Expandable | Expandable | |||
| Model | Area m2 | Model | Area m2 | Model | Area m2 |
| D8 | 80 | D20/36 | 200 | E12/36 | 240 |
| D10 | 100 | D22/36 | 220 | E16/36 | 320 |
| D12 | 120 | D24/36 | 240 | E20/36 | 400 |
| D14 | 140 | D26/36 | 260 | E24/36 | 480 |
| D16 | 160 | D28/36 | 280 | E38/36 | 560 |
| D18 | 180 | D30/36 | 300 | E32/36 | 640 |
| D32/36 | 320 | E36/36 | 720 | ||
| D34/36 | 340 | ||||
| D36/36 | 360 | ||||
Larox is committed to helping you...
- Reduce lifetime production costs
- Improve product quality, value and consistency
- Improve safety, health and environmental (SHE) performance
- Improve product yield