MDF Fiber Defibrator System-VẬN HÀNH HỆ THỐNG NGHIỀN SỢI MDF [Compatibility Mode]

Defibrator system topics... Surge bin functionsLevel control • Raw material buffer - Allows for short stops before surge bin • Constant residence time - More uniform fibre quality - More

Defibrator™ system training

MDF machinery

Defibrator™ system

Layout

Layout

Defibrator system

Components

• Surge bin SBRA 2900/40

• Screw feeder ADI 500

• Preheater PVA 1600/11

• Preheater discharge screw

• Defibrator feeder DFA 500L

Defibrator system topics

Surge bin

Surge bin functions

Presteaming

• Reduced evaporation in the dryer with presteaming

• Temperature equalisation

- Thaws chips in cold climates

- More uniform fibre quality

• Moisture equalisation

• Moisture equalisation

- More uniform fibre quality

• Natural rosin reduction

- Screw feeder squeeze-out

Surge bin functions

Level control

• Raw material buffer

- Allows for short stops before surge bin

• Constant residence time

- More uniform fibre quality

- More uniform moisture after the dryer

-Defibrator system topics

Screw feeder ADI 500

Screw feeder ADI 500

Screw feeder functions

• Steam-tight feeding device

• Controls preheater level

• Water squeeze-out

- Uniform moisture

- Rosin removal

- Dewatering plug pipe version High efficiency squeeze area

Alternative dewatering plug pipe

- Dewatering plug pipe version

High efficiency squeeze area

Screw feeder functions

Dewatering plug pipe

Screw feeder functions

Dewatering plug pipe

• Additional dewatering of

0.1 to 0.3 l/kg of raw material

• Reduces water load on the

• Reduces water load on the

Development of compression along an ADI 500 screw feeder

Metso screw feeder — compression curve

0 1 2 3 4 5 6

Defibrator system topics

Preheater

Blow back

damper functions

• Plug breaker

- Breaks up the compressed plug

• Pressure “control”

- Safety device against steam blow-backs

- Influences load and water

- Influences load and water squeeze-out »

Blow

back

damper

Preheater top

and bottom

with agitator

Preheater functions

• Pressure control

• Inert gas removal

• Preheating raw material

Preheater functions

Level control

• Level control

- Uniform fibre quality

• Retention time control

- Colour of the fibres

- Uniform fibre quality

- Capacity independence

»

040.20 SI1

HH

L

040.30 LC1

H

*

040.30 GC1

* HH

H

L

Retention time in the preheater

Example for PVA 1600/9

Diagram for calculating retention time or chip level Input data:

Throughput (t/h, db) Chip bulk density (kg/m³, db) Chip compression ratio

3200250

2000150

100

510

Example:

Wanted retention time 6 min

Throughput 17 t/h Chip density 180 kg/m³, db

LL H

L

CHIPS

040.15 LC1

040.20

L

HH H

HH

H L

040.30 LC1

040.30 GC1 040.30

WI1

040.20 SI1

Defibrator system topics

Side-feed screw arrangement

Side-feed arrangement

Defibrator feeder DFA 500

Defibrator feeder DFA 500

Defibrator system topics

Defibrator™ EVO 56

Defibrator™ EVO 56

EVO 56

Defibrator system topics

Hydraulic unit

Hydraulic flow sheet

Water activity detector

• Refiner monitor system (RMS)

• Refiner monitor system (RMS)

»

Water pre-treatment

Desalination—ion exchange and reverse osmosis

Water panel (Closed loop) and sealing steam flow switch

Sealing water system for

the mechanical seal

Version with sealing steam

Sealing water to seal

Water IN

Pressure transmitter

Temperature transmitter

from seal

to seal

Electrical cubicle Pressure

gauge

Safety valve

5 l/min

45 l/min 3.3 bar 0.7 bar

HH

H 80°C 70°C CoolerTI

M

Grease lubricator

• Used for

- Surge bin SBRA type

- Screw feeder (2 pipes)

- Plug breaker

- Agitator

- Agitator

• Feed guard cylinder

• Rotor Movement Control RMC

• Rotor Movement Control RMC

• Rotor position indicator

• Specific Energy Control

SEC

• Touchpoint Vibration Detector TVD

•

Refiner monitor

system (RMS)

• Control motor driver

• Control motor interface

• Vibration monitor

• Motor power monitor

• Touchpoint vibration

detector (TVD) detector (TVD)

• Limit display unit

• Rotor position monitor

• Hydraulic pressure monitor

Dr iver CMDÐRM1

12 34 567 8

Re ady Overloa d High tem p Over/Und er-vo ltag e

Ph as e interruption Phas e current PWM Ð Boos t 1-1.0 Ð 1 -0 6

CW Ð CCW 1/1 Ð 1 /2

Control Inputs

Contr ol Motor Interface CMIÐM1

12 345 67 8

Adjust Hig h

2 5 m m /s Ð

2 0 Ð

1 5 Ð

1 0 Ð 5 Ð

Vibration VIMÐRM1

Adj u st Outp ut Adj u st Outp ut Lim it 1 Lim it 2

Display Limits Tran sd uce r cal ibratio n

Motor Power MPMÐRM1

123 45 678 Adj u st Outp ut Adj u st Outp ut

L imit 1

L imit 2

Display Limits

10 0 % 90 40

Touch Point TVDÐRM1

12 34 567 8 Adjus t Outpu t Adjus t Outpu t

Li m it 1

Li m it 2

Display Limits High Gain

Temp OTMÐRM1

1 2345 67 8 Channel 1

Channel 2

Display Limits

Ad jus t Outp ut

Ad jus t Outp ut

L im it 1

L im it 2

Ad jus t Outp ut

Ad jus t Outp ut

L im it 1

L im it 2

Limit Display

LD UÐRM1

12 345 67 8

Menu

Enter Hea ds et TVD

Rotor Position POMÐRM1

1 234 567 8 Sensor cal.

Span Zero Outpu t Adjus t Outpu t Adjus t Outpu t Adjus t

Li m it 1

Li m it 2

Li m it 3 Display Limits

Hydraulic Pressure HPMÐRM1

1 234 56 78

Adjus t

Ou tpu t Adjus t

Ou tpu t

L im it 1

L im it 2 Adjus t

Ou tpu t Adjus t

Ou tpu t

L im it 1

L im it 2 A-chamber

B-chamber

Display Limits

Temp OTMÐRM1

123 456 78 Channel 1

Channel 2

Display Limits Adju st

Ou tpu t Adju st

Ou tpu t

Li m it 1

Li m it 2 Adju st

Ou tpu t Adju st

Ou tpu t

Li m it 1

Li m it 2

Temp OTMÐRM1

1 2345 678 Channel 1

Channel 2

Display Limits Adjus t

Ou tp ut

Ou tp ut

Li m it 1

Li m it 2 Adjus t

Ou tp ut

Ou tp ut

Li m it 1

Li m it 2

Guide valve, stepping motor, feedguard

A

P

T

M1 M2

Servo control system

Guide valve

Stator

Servo control system

Stator

Guide valve

Stator

• TVD high-high

- Touchpoint Vibration Detector

- Discs very close or touching

- Stone or metal between the discs

- Too high load

- Too high load

• Main motor power low-low

- Too low or no raw material feed

- Too wide disc gap

»

Defibrator system topics

Segment cost over time

0246

Segment change

Defibrator system topics

Blow valve

Drain valve and

blow valve

Blow line

Defibrator system topics

Diverter valve

Compact ball valve

Diverter valve principle

1 Normal operation to cyclone 2 Heating dryer pipe for 20 s

5 Normal operation to dryer

4 Cleaning cyclone pipe for 20 s

3 Switching from cyclone to dryer

Defibrator system topics

Sealing water system

Sealing water system

Pump system

• Preheater discharge screw

• Agitator

• Defibrator feeder

• Mechanical seal flush water

- Same or parallel system

- Advantage to steam

- Advantage to steam

- Load on dryer »

PI

Sealing water system

Flow sheet (principal)

FIA PI

FIA PI

PI

PI

PS

Sealing water system

- 8 – 10 l/min per packing box

- 6 l/min to mechanical seal

- Inlet pressure 13 bar(e)

- Counterpressure approx 2 bar above process pressure

• Alarm

Process control system (HMI)

Defibrator area