Agitated Nutsche Filter Dryer

Main Configuration:

1. Canister Filters, Flat Sintered Mesh or PTFE Cloth Filters；
2.  The hydraulic system assists the stirring shaft to move up and down, open and close the filter chassis, and raise and lower the filter chassis;
3.  The control system completes the filtering, washing and drying processes;
4. Auxiliary facilities: complete unloading, online sampling, online washing, vacuum drying, etc.

 

Core Structure

 

Core Components

1 Heated Components

Heated Stirring Shaft

Each stirring blade is internally designed with a heating/cooling circuit that extends to the tip of the blade; this design creates turbulence within the blade, enhancing heat transfer efficiency;

 

When the material comes into contact with the bottom edge of the blade, it “rolls over” the blade due to its sloped surface, thereby optimizing heat transfer.

 

2 Sealing Components

Spindle Mechanical Seal System:

Case Study:

The seal between the spindle and the tank (accommodating both rotational and axial movement) is achieved using the double-face mechanical seal (1) shown in the figure. This mechanical seal is available in either a “dry” or “wet” configuration, with the primary difference being the lubrication medium. The corresponding lubrication system (2) is fully configured accordingly (thermosiphon principle + motor-driven – wet type).

 

Based on differences in lubrication media and sealing configurations, the main types of mechanical seals include:

single-face mechanical seals, double-face wet mechanical seals, double-face dry contact mechanical seals, double-face dry non-contact mechanical seals, and double-face single-end non-contact mechanical seals.

 

3 CIP Components

 

Filter Cake Displacement Cleaning System

Tank Cleaning System

Tank Top Cleaning System

Mechanical Seal Cleaning System

Metal Bellows Cleaning System

Side-Mounted Discharge Valve Cleaning System

“Air Knife” Cleaning System

Piping Self-Cleaning System

 

 

Online washing and cleaning are performed using spray nozzles.

The arrangement of the spray nozzles ensures that all surfaces are thoroughly cleaned.

Ensure that all surfaces in contact with the product are thoroughly cleaned.

A riboflavin test will be conducted after the equipment has been cleaned.

 

Spray the riboflavin solution onto the inner surfaces of the equipment using a spray bottle.

Adding a starch-based additive increases the viscosity of the riboflavin, effectively causing it to adhere to the inner surfaces of the equipment.

Clean the inner walls of the equipment using an in-line cleaning system.

Inspect the inner surfaces of the equipment with ultraviolet light; any residual riboflavin will emit a bright green fluorescence.

Issue a final inspection report and designate non-validated areas.

 

4 Mechanical and Drive Components

 

Drive Assembly

Spindle Up/Down

The entire drive assembly is supported by the drive assembly bracket (1). The hydraulic cylinder (3), which performs the up/down motion guided by the chrome-plated guide rod (2), is housed inside the guide rod (2). The “hydraulic down” motion has both fast and slow speeds; the ‘slow’ speed can be preset via the hydraulic control panel. The “compression force” (4) exerted by the stirring shaft on the filter cake can also be preset on the hydraulic control panel; the drive unit’s lifting/lowering stroke can be mechanically limited (min., max.).

 

Main Shaft Agitation

The drive is powered by a motor (5), which transmits power through a reducer (6) to the main shaft (7), thereby driving the heated stirring shaft (4). The top of the stirring shaft is sealed via a rotary joint. For the entire unit, two motors are required: the main motor (5) and one