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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Filtration The filter is charged with slurry and pressure is applied to displace the filtrate leaving the cake retained over the filter medium.

Nutsche Filters are operating as part of a batch system hence the vessel’s volume is designed to accept an entire charge of slurry from the upstream equipment. This may have a layout impact on the downstream facility such as the conveyor that handles the product to storage. Opfration these components may be constructed from exotic materials of construction and heated to meet the process requirements. The interlock that disables opening the cake discharge valve or opening when the vessel is still under pressure.

In the washing stage a spray ring or connections on top of the cover introduce the wash liquid over the cake. This page was last edited on 28 Novemberat Handbook of Water and Wastewater Treatment Technologies.

These tasks are done by paddle or paddle and auger systems: Washing efficiency may be further improved if air or gas are not allowed to enter the cake in a multi-washing system nuutsche the wash liquids always displace the solutions in a “piston” like manner. The image below illustrates a cake that discharges in one piece from an Inverting Nutsche Filter that is not discussed in this section. Hydraulic Cylinder for Oeration Arms.

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

The cleanliness of the filtrate sight glass that enables the inspection of filtrate clarity. Agitated Nutsche filters are used widely in the production processes of pharmaceutical, chemical and laboratory industries, among avitated. As such these are very sophisticated machines with tight process control on parameters such as pressure, temperature and pH.


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. Further reduction in cake moisture may be obtained by slowly rotating and lowering the paddle fiter to scrape and delump the cake.

Agitated Nutsche Filter – Chempro Gujarat India

This is done by resuspending the cake with the paddle arms for thorough mixing with the wash solution. Click on the thumbnail to maximize the image. In their modern version they were developed in the early 80’s and the majority operates, usually under pressure, in batch oriented industries such as fine chemicals, dyes, pharmaceutics and pesticides.

For applications that require preservation of temperature the vessel may be double-walled or half-pipe jacketed to provide effective heat transfer to the product.

Agitated Nutsche Filter

Such filters have a filtration area of 15 m2 and are suitable for fast filtering slurries that produce readily 0. The swing type locking bolts that attach the head and cylinder on the smaller machines to the filter floor. Agitated Nutsche filters can be fabricated in materials like Hastelloy C, C, stainless steelmild steeland mild steel with rubber lining as per service requirements.

The condition of the filter medium, cloth or mesh screen, must be done periodically to ensure that they are not damaged. The vessels are generally designed for an operating pressure of bars but higher pressures may be specified if required. The Nutsche Filter is the industrial version of the well known laboratory scale Buchner Funnel except that it is designed to operate under either on vacuum or pressure. By using this site, you agree to the Terms of Use and Privacy Policy. 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.

During folter the rotating arms are moving slowly downwards and are “shaving” the bed gradually layer after layer until the entire cake enters the filtrr. With this arrangement it is necessary to enter the vessel for the replacement of the filter medium. The same procedure also applies to side discharge machines however it should be noted that in this case the cake comes out intermittently and not continuously.


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.

Present day Nutsche Filters are constructed to perform a multitude of tasks including reaction, filtration, cake washing and thermal drying on a single unit. The ends must be cut in an angle to ensure a perfect seal.

The vent nustche top of the head must be checked for free evacuation of air. 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 entire vessel can be kept at the desired fi,ter by using a limpet jacket, jacketed bottom dish and stirrer blade and shaft through which heat transfer media can flow.

This arrangement has usually swing type fast locking bolts which are attached to the circumference of the filter floor.

The Nutsche Filter requires attention on a regular basis to safety devices and automation features that accompany modern filters. To view the components move mouse pointer over the menu. The operation of Nutsche Filters requires a complex manipulation of valves and hydraulics so present day installations are always semi or fully automated. The agitator performs a number of operations through movement in axes both parallel and perpendicular to the shaft.

The paddle agitatted are rotated in the opposite direction for cake smoothing to seal cracks prior to cake drying. The Nutsche in its full configuration consists of four major components:

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