Agitated Nutsche Filter Dryer

What is an Agitated Filter Dryer?

An Agitated Nutsche Filter Dryer (ANFD) which is also known as agitate filter (ANF Filter) is a multipurpose filtration and drying system used widely in the chemical and pharmaceutical industries for efficient separation and drying of solids and liquids. A closed, pressure-tight design of an agitated filter ensures precise control over parameters like temperature, pressure, pH, and agitation. This agitated nutsche filter design can filter pharmaceutical ingredients (APIs), hazardous chemicals, and other sensitive materials in industries.

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The agitated nutsche filter dryer diagram typically includes a cylindrical vessel with a flat bottom and top-dished head, along with essential nozzles, a manhole, and a side discharge outlet for easy handling. The ANFD design incorporates an agitator mechanism with "S"-curved blades, specifically crafted to manage high torque during operations like solid discharge and re-slurring. These blades, mounted on a main shaft that can rotate and move vertically, perform critical tasks, including filling, filtering, washing, reslurrying, drying, and discharging. The closed ANFD design helps to prevent cross-contamination, maintaining product purity and providing an odor-free, contamination-free workspace.

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Kumar Process Consultants - Agitated Nutsche Filter Dryer Manufacturer


Kumar Process Consultants, a leading ANFD manufacturer in India, specializes in offering high-quality agitated filter dryers to industries needing efficient solid-liquid separation and drying solutions. Based in Thane, near Mumbai, India, we serve clients across the chemical, pharmaceutical, and food processing sectors, providing agitated nutsche filter dryers that are built to operate seamlessly under both vacuum and pressure conditions.


As a top agitated nutsche filter dryer manufacturer in India, we integrate filtration, agitation, and drying into one cohesive system, offering a cost-effective solution that enhances productivity while ensuring precise control and reliability. Our agitated filters are used for providing efficient performance and high-quality products that are used in modern production processes.


Connect with our experts to inquire more about agitated nutsche filters for your industrial applications.


ANFD Working Principle

Lets understand the Agitated Nutsche Filter dryer operating procedure through below steps:

This is the initial step of agitated nutsche filter dryer operation, slurry is introduced into the filter, ideally through gravity flow from a reactor positioned above the filter, or alternatively, using a slurry pump. To maintain stability during the process and prevent the filter cloth from ballooning, a pressure balance line is kept open, ensuring smooth and consistent filtration. This setup allows for efficient transfer of the slurry while protecting the integrity of the filter cloth.

This is the second step of the agitated nutsche filter dryer working principle. As the slurry is charged into the filter, the filtrate begins to pass through the filter cloth by gravity. To improve the filtration rate and prevent initial sedimentation on the filter media, the agitator is lowered to its lowest position and rotated in a forward direction. This action helps keep the filter media clean, enabling efficient filtration. The cake height can then be gradually built up in successive steps, ensuring consistent and effective filtration.

This is referred to as the third step of the agitated nutsche filter working principle. During the filtration process, wash liquid is sprayed into the chamber onto the cake through a spray ring. The stirrer blades are then lowered to agitate the slurry, ensuring effective washing of the filter cake. This washing is performed repeatedly, allowing for thorough removal of impurities.

As the filtration process nears completion, the stirrer blades are positioned down onto the cake surface. A specially designed hydraulic system takes over, systematically smoothing out any cracks that may have formed in the cake. This advanced approach reduces residual moisture by 10 to 20% compared to conventional filters, leading to significant energy savings in the drying process—up to 40%.

Following the final wash and compression in agitated nutsche filter dryer working principle, a heating medium is introduced into the limpet or jacket surrounding the shell, as well as into the chamber below the filter plate and the hollow shaft and blades. The stirrer blades are lowered, and the cake mass is agitated during the drying stage. To enhance efficiency, vapor is removed under vacuum through a dust catcher, and additional drying can be achieved by purging hot gas through the cake.

For product discharge, the stirrer blades rotate and are lowered to cut away the upper surface of the filter cake. This process ensures effective removal and facilitates easy handling of the dried product, completing the efficient operation of the agitated filter dryer.

ANFD design - Agitated Nutsche Filter Dryer Diagram includes four key components:


pressure-vessel

Vessel

Available in one- or two-piece designs with various base options. Jacketed vessels are offered for temperature-sensitive applications to ensure effective heat transfer. Optional features include insulation, sheathing, main body flanges, and push

production

Drive Assembly

This includes an S-blade agitator, a twin or quad column support structure, bellows, a gearbox, shaft coupling, and a double dry mechanical seal for reliable operation.

valve

Discharge Valve

A fail-safe side discharge valve with a metal-to-metal seal, capable of handling automatic discharge of dry products, solvents, slurries, or wet products. It features hydraulic actuation and a robust hinge system.

air-filter

Dust Filter

Mounted on top of the vessel, the dust filter accommodates various filter media and comes fully jacketed with insulation and sheathing. It is housed in a pressure-rated design to prevent dust blowback and includes a nitrogen accumulation tank for safe element removal.

Material of Construction of ANFD dryer

Our Agitated Nutsche Filter Dryers (ANFD) are made from high-quality materials Stainless steel, Hastelloy C-276, Hastelloy C-22, Hastelloy C to used in the chemical, pharmaceutical, and food industries for separating solids from liquids and drying them.

Filter Media Used in Agitated Nutsche Filter and Dryer

Metallic Filters

Metallic Filters

Metallic filters are used as filter media in ANFD (Agitated Nutsche Filter Dryer) dryers, providing durability, efficiency, and resistance to extreme conditions. These filters offer excellent mechanical strength and withstand high temperatures. Metallic filters ensure consistent filtration and drying performance, capturing fine particles and enabling easy cleaning and reuse, which extends the filter’s lifecycle and reduces operational costs.

Metallic Filters

Multilayered Sintered wire mesh

Multilayered sintered wire mesh is used as filter media in agitated filters. Its robust, multilayer construction offers high durability, precise filtration, and uniform pore distribution, making it ideal for handling high-pressure in drying processes. The sintering process fuses multiple layers of mesh, providing a stable structure that resists deformation and offers excellent backwashing capability. Offering superior filtration and cleaning methods for long-lasting performance.

Benefits of Agitated Filter Dryer

Using ANFD in the pharma and chemical industries provides numerous advantages, which are outlined below:

  1. Extraction of active agents from organic solids.
  2. Filters solid particles.
  3. Ergonomically designed filtration and drying solutions.
  4. Optional integrated containment systems.
  5. Simultaneous agitation and inert gas drying.
  6. Environment safe, totally enclosed systems.

Applications of Agitated Filter Dryer

ANFD in Pharma

ANFD, which stands for Agitated Nutsche Filter Dryer, is used in the pharmaceutical industry due to its ability to efficiently separate and dry materials while minimizing contamination risks. This equipment is designed to maintain the highest levels of product purity, making it ideal for the production of active pharmaceutical ingredients (APIs).

ANF in Chemical Industry

In the chemical industry, ANF, short for Agitated Nutsche Filter, plays a vital role in separation and purification processes. ANF in chemical plants are used for separation of solid particles from liquids, to remove impurities and residual solvents. The drying process is conducted under vacuum conditions to achieve the desired moisture content without compromising the integrity of the materials.

FAQS on Agitated Filter Dryer

What is an Agitated Filter Dryer?

An Agitated Filter Dryer (AFD) is a versatile piece of equipment used for solid-liquid separation, washing, and drying in a single unit. It's commonly used in chemical, pharmaceutical, and food industries to process various products efficiently.

What is the working principle of ANF filter?

Agitated filters are mainly used for filtration, washing, and drying processes of intermediates and active ingredients. The anfd working principle involves loading a slurry into the vessel, agitating it for filtration, washing the solid cake, drying it with heat or vacuum, and finally discharging the dry cake. in a closed system, ensuring high purity and efficiency.

How to use ANFD in pharma?

ANFD in pharma are used for production of Active Pharmaceutical Ingredients (APIs). They provide high-purity, homogeneous products through efficient filtration, washing, and drying processes.

What is the difference between ANF and ANFD?

ANF (Agitated Nutsche Filters) primarily focuses on solid-liquid separation through filtration. In contrast, ANFDs (Agitated Nutsche Filter Dryers) combine both filtration and drying capabilities in one system.

What is the full form of ANF filter?

ANF stands for Agitated Nutsche Filter. This filtration technique is commonly used in applications such as dye and paint production, pharmaceutical manufacturing, and wastewater treatment.