3 Layer Headboxes

The basic functions of the headbox 3 layer are, kecuali:

• 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.

the purpose of the 3 layer headbox is

• consistency profiling across the entire width of the machine

• diluting the main flow in the cross direction

• to allow high production speed

• production inefficiency

Headbox main components adalah, kecuali:

• 1.Control box

  2.Shape Optimized header

• 1.Dilution CD- profiling system

• Slice box

• 4.Turbulence generator

  5.Slice channel

An external attenuator is located in the headbox approach pipe right before the headbox, fungsinya adalah, kecuali

• 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

The inlet header design untuk, kecuali:

• 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

Inlet header terdapat funsi berikut kecuali:

• 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 header
Recirculation adjustment & pressure equalisation yang berperan adalah kecuali:

• Inlet pipe

• 3. Recirculation pipe

  4. Sight glass

• Outlet pipe

• 5. Recirculation hand valve

  6. Recirculation control valve

cara kerja headbox Dilution profiling system, kecuali:

• 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.

The purpose of the dilution equipment is, kecuali:

• 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

Basis weight profiling is done by, kecuali:

• 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.