Fully Automatic Filtering Washing and Drying Three-in-One Equipment

This fully automatic Three-in-One equipment integrates filtration, cake washing and vacuum drying within a single closed vessel. It completes solid-liquid separation, filter cake purification, vacuum drying and automatic discharging in one tank without material transfer between units. It features fully enclosed operation, low cross-contamination risk, and meets GMP requirements. Widely used for pharmaceuticals, fine chemicals, pesticides, new energy materials and food industries.

PRODUCT DESCRIPTION

Description 

 This “three-in-one” equipment integrates filtration, washing and drying functions. It can replace separate filtration and drying equipment (such as adsorption filters, Filter Presses, double-cone dryers, drying ovens, etc.), completing the whole process of filtration, washing, drying and solid discharge within a single unit. Widely applied in pharmaceutical, chemical, pesticide, food and other industries, it is an optimal choice for filtration and drying processes. Capable of fully enclosed, continuous full-process operation and production, it is especially suitable for manufacturing sterile and toxic products.

Filtration Stage: Separate the product filter cake from mother liquor. The maximum allowable filter cake thickness can reach 500 mm. 

Washing Stage: Further purify the filter cake, wash away residual mother liquor and perform pre-dewatering. The agitator lifts to mix the filter cake with washing liquid layer by layer to form slurry, ensuring thorough washing of the suspended filter cake. 

Drying Stage: Dewater and dry the filter cake. While the agitator scrapes and loosens the filter cake layer by layer, the side wall of the vessel, the bottom of the filter plate and the moving agitator blades heat the filter cake simultaneously to rapidly evaporate moisture for drying. The vacuum environment inside the equipment accelerates evaporation. Treated hot nitrogen and other media are introduced to carry away evaporated moisture, speeding up material drying and improving drying performance.

Bottom Plate Structure Main material: AISI304 or 316L. Filter medium: Sintered metal plate or filter cloth, available from 5 μm to 50 μm upon customer request. Dead-edge distance of filter cloth: 25 mm per side. Flatness of single-sided bottom plate: ±1 mm/m.

A. Fixed base: Welded to the cylinder body of the equipment, fitted with a heating system for heating and drying. 

B. Removable base: Upper and lower flanges are clamped by fixtures to achieve sealing. The base can be detached and lowered to ground level via hydraulic cylinders. Wheels are installed at the bottom of the base for movement to facilitate filter plate cleaning. The base is equipped with a heating system, available in two types: channel type and pipe heating type. The filter plate is fixed by bolts mounted at the bottom of the base to keep balance. Product-wetted parts are fitted with bolts.

Discharge Stage: Dry material is automatically discharged from the side discharge port through reverse rotation of the S-shaped agitator blades and directly transferred for packaging.

A. Agitator rotation (clockwise & counter-clockwise)

1. The driving shaft is rotated after speed reduction by a motor reducer. The rotating speed can be quickly adjusted via frequency converter.

2. A hydraulic pump supplies power to the hydraulic motor to drive shaft rotation; the rotating speed is controlled by regulating valves. The hydraulic pump on the hydraulic station provides power for agitator lifting/lowering and base movement. 

B.Reducers shall be sourced from Changzhou Guomao or German manufacturers.

C. Rotating speed: Adjustable range of 0–20 rpm via frequency converter, equipped with safety protection devices.

Structural Design

Vessel material: Product-wetted parts adopt 316L Stainless steel. The inner wall is mirror polished with Ra ≤ 0.4 μm, free of dead corners and blind pipes, supporting CIP (Clean-in-Place) and SIP 121°C steam sterilization. 

Magnetic drive unit: Integrated top magnetic coupling assembly, no packing, no mechanical seal, no sealing water required and no lubricant contamination. 

Multi-functional agitation system: S-type liftable blades. Forward rotation for compaction during filtration, reverse rotation for scraping during discharging, low speed for mixing and washing, high speed for breaking dry agglomerates. 

Bottom filter plate: Optional sintered metal filter plate or porous backing plate, suitable for filtration of fine crystalline powders. 

Constant-temperature jacket: The jacket can circulate hot water / thermal oil / cold water, applicable for low-temperature drying and constant-temperature washing processes. 

Full sanitary quick connectors: Feed port, cleaning nozzle, vacuum port, solvent inlet and sampling port all adopt sanitary clamp connections. 

Sealed discharge structure: Bottom discharge valve for dust-free operation throughout the process, which can connect to drums for sealed transfer.

Working Principle of Nutsche Filter Dryer

The Nutsche filter dryer integrates filtration and drying operations into one single equipment. Filtration achieves solid-liquid separation, while agitated vacuum drying supports batch production of chemical and pharmaceutical products. The filter dryer can also be applied to other processes such as plant extraction.

Features

· The equipment is designed and assembled in strict accordance with national GMP requirements and fully meets pharmaceutical production process specifications. The system is safe, stable and reliable.

· Strict control over equipment materials. Parts in direct contact with materials are made of non-toxic, corrosion-resistant sealing materials, such as austenitic stainless steel (316L, 304), Hastelloy, PTFE, FFKM or EPDM. Sintered metal filter screens are made of SUS316L, C22 and other materials.

· Internal surfaces in direct contact with materials are smooth and free of dead corners for easy cleaning and sterilization.

· The equipment will not pollute the external environment. Dust-proof, leak-proof, thermal insulation and noise reduction measures are properly implemented. Under fully enclosed working conditions, the motor, reducer and lifting device are protected by stainless steel housings. Return pipes inside the jacket are wrapped with thermal insulation cotton to minimize heat loss, reduce heat exchange with ambient surroundings and lower environmental impact.

· Adopts safe and reliable explosion-proof electrical components. Equipped with static elimination devices and other safety interlocks and safety assemblies.

· Pipes for all materials, solvents and nitrogen are designed without dead corners or blind pipes. Equipment surfaces are finished by fine mechanical polishing or electrolytic polishing. Internal surface roughness Ra ≤ 0.4 μm, external surface roughness Ra ≤ 0.8 μm.

· Mixing shaft and side discharge valve stem are fitted with metal bellows.

· 360° spray cleaning balls (CIP) are installed inside the vessel for 360° rotating spraying.

· Dry double-sided mechanical seal with nitrogen protection and cooling.

· Dust collector with CIP function.

Batch Filtration & Drying Process Steps

1. Filling Slurry (solid-liquid mixture) is fed into the vessel, usually transferred from a reactor or crystallizer.

2. Filtration Solid-liquid separation takes place through filter media. Filtrate (solvent) is collected underneath the filter plate.

3. Displacement Washing Wash the filter cake with washing liquid by displacing a certain volume of liquid through the cake.

4. Reslurry Washing The agitator resuspends solids in washing solvent.

5. Compaction The agitator compresses the wet filter cake inside the filter dryer to avoid cracks or preferential flow channels.

6. Drying and Cooling Agitated vacuum drying: vacuum is applied to the vessel while the vessel wall and agitator are heated via thermal circuits. This brings the liquid to boiling point and dries the product.

7. Discharge The specially designed agitator pushes the product toward the side discharge port.

Main parameters

Application Scope

This  Fully Automatic Filtering Washing and Drying Three-in-One Machine is widely used for pharmaceuticals, fine chemicals, pesticides, new energy materials and food industries.

Pharmaceutical Industry

Chemical Industry

New Energy Industry

FAQ

1.Are you a factory or trading company?

We are a professional manufacturer with integrated R&D, production, and quality control facilities. We provide OEM/ODM services for pharmaceutical equipment and welcome clients to audit our factory in Yangling, China.

2.Why choose us?

15+ Years of Expertise: Specialized in R&D and manufacturing of pharmaceutical equipment (sterilizers, reactors, lyophilizers, etc.). Custom Solutions: Tailor-made designs for GMP-compliant processes. End-to-End Support: From engineering to validation documentation. Global Compliance: Adherence to cGMP, ASME BPE, and ISO standards.

3.What is your delivery time?

Standard Equipment: 3-5 working days after payment (most items in stock). Customized Systems: 4-8 weeks (timeline confirmed post-design approval). Urgent orders: Contact us for expedited options.

4.What shipping methods do you offer?

Global shipping via: Express: DHL/UPS/FedEx/TNT (3-7 days). Air Freight: For urgent large equipment (5-10 days). Sea Cargo: Economical for bulk orders (FOB/CIF terms). Confirm method before order placement.

5.What about after-sales service?

Warranty: 18 months (parts & workmanship). Lifetime Support: Technical guidance & paid maintenance. Spare Parts: Genuine components with global dispatch. On-Site Services: Installation supervision and SAT support.