3 Layer Headboxes

uniform stock distribution across the entire width of the machine

flocculation

adjustment of slice jet velocity

direction as well as production of turbulence according to the quality requirements of the end product.

consistency profiling across the entire width of the machine

diluting the main flow in the cross direction

to allow high production speed

production inefficiency

1.Control box

2.Shape Optimized header

1.Dilution CD- profiling system

Slice box

4.Turbulence generator

5.Slice channel

reduces pressure pulsations

•Dampens pulsation coming from headbox feed pump and machine screen

•Pressure loss over the tank perforated plate dampens pulsations

accesories of tank

permits non uniform distribution of stock

distribution of stock from the approach flow system

distribution of stock from the approach flow system across the entire width of the machine.

inlet header is fitted with a recirculation connection. The pressure balance

The inlet header is also equipped with a sight glass

The pressure balance in the inlet header can be seen through the sight glass.

The inlet header is also equipped with tanks

The inlet header contains transition components which connect the headbox to the headbox approach pipe and to the recirculation pipe on the recirculation side.

Inlet pipe

3. Recirculation pipe

4. Sight glass

Outlet pipe

5. Recirculation hand valve

6. Recirculation control valve

dilution water supply equipment for basis weight profile control

Weight Profile Control

The headbox is divided into cross-direction dilution zones.

Dilution water volume is regulated by valves connected to actuators.

to mix dilution water into the stock

used to control the MD profile of paper.

flows from the inlet header as evenly as possible

create a stock flow whose consistency differs from that of the inlet header flow

less dilution water and feeding pressure can be high

controlling stock consistency locally with a dilution profiling system

The injection of dilution water is done inside the closed-tubes near the jet

The white water from the silo is used as a profiling water.