Agitated Filter is a closed vessel designed to separate solid and liquid by filtration under pressure or vacuum. The closed operation ensures odorless. Filtration and drying are critical operations in a variety of industrial processes that require the ry is unique to agitated nutsche filters. Agitated. Nutsche Filter &. Dryer (ANF/ANFD). NSI. E Q U I P M E N T S . Operation. Agitated Nutsche Filters are extensively used in Chemical,. Herbal.

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This page was last edited on 28 Novemberat The large diameter caulking gasket of the dished top head cover. When this happens the fines seal the cake and slow down the cake formation so keeping the slurry in suspension with rotating arms during filtration assists in forming a homogeneous cake. This arrangement has usually swing type fast locking bolts which are attached to vilter circumference of the filter floor.

The filter is charged with slurry and pressure is applied to displace the filtrate leaving the cake retained over the filter medium. For applications that require preservation of temperature the vessel may be double-walled or half-pipe jacketed to operxtion effective heat transfer to the product. Cake Discharge Once all the stages are completed the cake discharge valve opens and the paddle arms on the smaller machines or the auger arms on the larger ones are rotated and lowered to convey the dry cake towards the center.

Agitated Nutsche filter ANF is a filtration technique used in applications such as dyepaintand pharmaceutical production [1] and waste water treatment.

Agitated Nutsche Filter – Chempro Gujarat India

Present day Nutsche Filters are constructed to perform a multitude of tasks including reaction, filtration, cake washing and thermal drying on a single unit.

To view the components move mouse pointer over the menu. Vacuum Drying Further reduction in cake moisture may be obtained by slowly rotating and lowering the paddle arms to scrape and delump the cake. The selection depends entirely on the characteristics of the solids, the liquid and the appropriate materials of construction.

As such these are very sophisticated machines with tight process control on parameters such as pressure, temperature and pH. In this system two separate hydraulic arrangements raise and lower the paddle arms and the auger arms independently depending on the filtration cycle. A multipurpose agitator is the unique feature of this system.



There are two types of vessels: Filtration The filter is charged with slurry and pressure is applied to displace qgitated filtrate leaving the cake retained over the filter medium.

Such filters have a filtration area of 15 m2 and are suitable for fast filtering slurries that produce readily 0. Medium selection cannot be determined on a bench scale leaf test and it is only pilot testing that can establish long term effects such as medium blinding and fluctuations in the feed properties.

Retrieved from ” https: Washing efficiency may be further improved if air or gas are not allowed to enter the cake in a multi-washing system so the wash liquids always displace the solutions in a “piston” like manner. The control system for modern Nutsche Filters is very sophisticated since it activates and deactivates many components as may be seen in the section Operational Sequence.

The pressure relief valve that is located on the top of the dished head must be checked for emergency functioning. From Wikipedia, the free encyclopedia.

Agitated Nutsche Filter

Cake Washing In the washing stage a spray ring or connections on top of the cover introduce the wash liquid over the cake. By using this site, you agree to the Terms of Use and Agiitated Policy. The Nutsche Filter requires attention on a regular basis to safety devices and automation features that accompany modern filters.

Pressure Drying In the drying stage air or gas purges the cake until the captive moisture is reduced to an asymptotic level and in practical terms the cake is considered to be as dry as possible. The interlock that disables opening the cake discharge valve or opening when the vessel is still under pressure.

In this system one of the hydraulic cylinders raises and lowers the paddles depending on the filtration cycle. The major components to take care of are: Nutsche Filters are available in almost any size with the larger machines for a slurry filling batch of 25 m3 and a cake volume of 10 m3. On the larger filters the cylindrical vessel is a separate part and the dished head cover is bolted on its top.

Once all the stages are completed the cake discharge valve opens and the paddle arms on the smaller machines or the auger arms on the larger ones are rotated and lowered to convey the dry cake towards the center.


To take advantage of the drying ability of the Nutsche Filter it is worth considering the option of heating components such as the vessel, filter floor and paddles to enhance drying. With this arrangement it is necessary to enter the vessel for the replacement of the filter medium. This may have a layout impact on the downstream facility such as the conveyor that handles the product to storage.

Millennium Equipments (P) Ltd.

On smaller filters the head and cylinder are in one part that bolts to the filter floor featuring easy access to the filter medium. The entire vessel can be kept at the desired temperature by rilter a limpet jacket, jacketed bottom dish and stirrer blade and shaft through which heat transfer media can flow.

This is done by resuspending the cake with the paddle arms for thorough mixing with the wash solution. Hydraulic Cylinder for Spreader Arms. One of the advantages of the Nutsche Filter is the ability to smoothen the cake’s surface prior to applying spray wash so that the entire bed is washed evenly.

This is achieved by a special detector that monitors the surface of the cake for moisture and once air or gas start entering the bed a signal is transmitted to close the filtrate valve and reopen it once next washing commences.

They are manufactured as agitated Nutsche filter dryers ANFD’S for the filtration and drying in the same unit of active pharmaceutical ingredients API and chemical compounds.

The paddle system consists of two arms with slanted blades that rotate in one direction to re-slurry the cake during washing and discharge it at end of cycle. These tasks are done by paddle or paddle and auger systems: This seals cracks in the cake so that air or gas will not bypass the bed. Agitated Nutsche filters are used widely in the production processes of pharmaceutical, chemical and laboratory industries, among others.