Multiple Effect Evaporator – Selection of Solid Seperation Equipment 

The selection of Solid separation equipment for Multiple Effect Evporator is a critical decision and must be done after consideration. It significantly affects the performance of Multiple Effect Evaporator.

The following equipment is used for Solid Separation :

• ATFD (Agitated Thin Film Dryer)
• Centrifuge (basket type)
• Pusher centrifuge
• Filter press
• Nutch Filter

ATFD (Agitated Thin Film Dryer) Equipment For Solid Seperation – Multiple Effect Evaporator

When to Use ATFD(Agitated Thin Film Dryer)

• when you need dry solid without any moisture content. 
• After drying Solid Forming Lumps
• Sticky Solids
• Non Crystalline solids
• Solids that cannot be filtered

Advantages for ATFD(Agitated Thin Film Dryer)

• Completely dry output of solids
• Single point automatic discharge of solids
• Mother liquor re-circulation not require

Disadvantages for ATFD(Agitated Thin Film Dryer)

• Expensive
• More steam consumption
• Material that  comes out is hot whereas it requires to be cool for bagging.
• Not suitable for small quantities of solid output

Centrifuge (Basket Type) Equipment For Solid Seperation – Multiple Effect Evaporator

When to use Centrifuge (Basket Type)

• When 2-5% moisture is allowed in the solids e.g. Solids sent to solid disposal grounds. 
• Quantity of solids can be handle manually
• Non Crystalline solids
• Crystalline solids like sulfates, carbonates, and other salts.

Advantages of Centrifuge (Basket Type)

• Moisture content can be as low as 2-5%
• It can also handle small amount of solids
• It is very Cost effective

Disadvantages of Centrifuge (Basket Type)

• Batch processing
• It involve manual labour
• Cannot be use for large quantities of solid output

Pusher Centrifuge Equipment For Solid Seperation

When to use Pusher Centrifuge: 

• When 5-7% moisture is allowed in the solids e.g. Solids sent to solid disposal grounds. 
• Non Crystalline solids
• Crystalline solids like sulfates, carbonates, and other salts.
• A minimal 1000 kg per hour of solids are present

Advantages of Pusher Centrifuge: 

• Moisture content can be as low as 5-7%
• It can handle large amount of solids
• No manual labour required

Disadvantages of Pusher Centrifuge:

• Cannot be used for small quantities of solid output

Filter Process Equipment For Solid Seperation

When to use Filter Process:

• When moisture content up to 30% is acceptable
• Solids forming lumps after drying. 
• Solids forming cakes when filtered
• Non Crystalline solids

Advantages Filter Process: 

• No maintenance
• It can handle any amount of solis(very less solids to very large quantities)

Disadvantages Filter Process:

• High moisture content
• Involve manual labour

Nutch Filter Equipment For Solid Seperation

When to use Nutsche Filter :

• When 30% moisture content is acceptable
• Non Crystalline solids
• Crystalline solids like sulfates, carbonates, and other salts.
• It handle small quantity of solids

Advantages of Nutsche Filter : 

• Very cost effective
• Simple to use and operate
• No maintenance required

Disadvantages of Nutsche Filter:

• Cannot be used for higher quantities of solid output
• Completedly manually operated
• High moisture content