Wet End

An analysis of a paper machine circuit shown below yielded the following data:

Production rate 500 BDT/day

Total fibre, filler and additive flow to the machine 360 kg/min

Average solids content from couch system to fibre recovery 32 kg/min

Average solids content from press section to fibre recovery 2 kg/min

Paper machine headbox consistency 0.80 %

Backwater flow and consistency 49000 lpm at 0.15 %

3.1 Determine the following:

The amount of solid material leaving the paper machine system.

The solid mass flow (in kg/min) of all process streams.

First pass retention by 2 methods.

Machine retention.

System retention.

Wet End

An analysis of a paper machine circuit shown below yielded the following data:

Production rate 500 BDT/day

Total fibre, filler and additive flow to the machine 360 kg/min

Average solids content from couch system to fibre recovery 32 kg/min

Average solids content from press section to fibre recovery 2 kg/min

Paper machine headbox consistency 0.80 %

Backwater flow and consistency 49000 lpm at 0.15 %

3.1 Determine the following:

The amount of solid material leaving the paper machine system.

The solid mass flow (in kg/min) of all process streams.

First pass retention by 2 methods.

Machine retention.

System retention.

Wet End

An analysis of a paper machine circuit shown below yielded the following data:

Production rate 500 BDT/day

Total fibre, filler and additive flow to the machine 360 kg/min

Average solids content from couch system to fibre recovery 32 kg/min

Average solids content from press section to fibre recovery 2 kg/min

Paper machine headbox consistency 0.80 %

Backwater flow and consistency 49000 lpm at 0.15 %

3.1 Determine the following:

The amount of solid material leaving the paper machine system.

The solid mass flow (in kg/min) of all process streams.

First pass retention by 2 methods.

Machine retention.

System retention.