ANDRITZ pulp dewatering for standard applications

ANDRITZ Twin Wire pulp machine – optimum sheet quality, fiber formation, and tensile strength

Components of the ANDRITZ Twin Wire Press market pulp dewatering machine

• Headbox
• Former
• Press section with heavy duty press, shoe press

Advantages at a glance

• Up to 50% dryness without vacuum
• Low operating and maintenance costs
• Low energy consumption
• High plant availability
• Proper sheet formation

ANDRITZ Twin Wire Press – forming zone with efficient double-sided dewatering

The forming section starts directly after the headbox. Thus, optimum formation can be achieved on the top and bottom side of the sheet.

ANDRITZ Twin Wire Press advantages

• Double-sided dewatering immediately after the headbox
• High capacities
• Gentle and efficient dewatering
• No vacuum applied
• Potential energy reduction of 10-20 kWh/t compared to Fourdrinier machines
• No risk of sheet sealing
• Fines are distributed evenly in the sheet
• High sheet strength, optimum formation
• Heavy sheet due to high basis weight – easy to cut
• Easy operation and high up-time
• Minimal maintenance due to simplified design

ANDRITZ Fourdrinier machine – increased capacity and runability

Components of the ANDRITZ Fourdrinier market pulp dewatering

machine

• Headbox
• Wire section
• Press section with combi press, heavy duty press, shoe press

ANDRITZ Fourdrinier machine advantages

• Step diffuser headbox with manual or automatic dilution system for profile adjustment
• Length of forming board according to pulp furnish and capacity
• Up to three driven rolls for higher vacuum capability
• Steam blow box for web heating

ANDRITZ headbox – optimum sheet profile and sheet formation

Well-proven, state-of-the-art headbox technology is used in paper production as well as for fluff pulp dewatering machines. The hydraulic flow is even and uniform due to the conical inlet header. Together with the step diffuser, this delivers a good sheet profile and a strong sheet.

ANDRITZ headbox advantages

• Conical shape for even hydraulic flow and homogenous pulp distribution
• Dilution profiling system (manual or automatic control) in turbulence section for optimum sheet profiles
• Proper sheet formation and high sheet strength
• Easy maintenance (swiveling type, good accessibility)

ANDRITZ heavy duty press advantages

• Fully cantilevered frames, minimal felt change time
• No need to remove felt guide rolls for felt change
• Can use heavy felts with high water retaining capacity
• All felts run above machine floor, clean operation on ground level
• All felts designed for the same length
• Large diameter press rolls (wide press nip)

ANDRITZ press section with combi and shoe press

ANDRITZ combi press advantages

• High dryness due to high linear design pressure
• Easy and fast start up due to tail transfer system
• High ingoing dryness due to felted lump breaker

ANDRITZ shoe press with X-Nip (ANDRITZ Prime Press X) advantages

• 3-5% higher dryness than HI presses
• High dryness due to optimum pressure curve
• Long service life of press sleeves

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