The document discusses various components of a paper mill, including deinking plants, pulp mills, board machines, paper machines, and finishing houses. It then summarizes the key characteristics and processes of each component. The document also compares induction motors and synchronous motors for driving large industrial loads like those in a paper mill. Synchronous motors are generally more efficient, especially at unity power factor. Synchronous motors can also be operated in a self-controlled mode using adjustable frequency drives for variable speed control like a DC motor.

1. B.PRAKASH,DEEE.,

3.  Deinking plant
 Pulp Mill
 Board Machine
 Paper machine
 Finishing House & Dispatch

5. • Deinking is the industrial process of
removing ink from paper fibers of recycled
paper to make deinked pulp.
• Deinking plant is mainly used for removing
various another material(impurities) and to
refine the pulp to fresh material supplied to
machine.
• There are two types of deinking plant
1. Voith deinking plant.
2. Lamort deinking plant.

7.  A pulp mill is a manufacturing facility that
converts wood chips or other plant fibre
source into a thick fibre board which can be
shipped to a paper mill for further
processing.

9. • It is the machine which is used for making a
paper by rolling process.
• All the process are similar as in board
machine.
• This machine yields three types of papers
1. Board Machine
2. News Paper
3. Writing Paper

11.  It is a machine in which we make board paper by
rolling process
 Raw material transfer from shorting conveyors to
pulper and other devices used for removing the
impurities and various particles as plastic pin,pebels etc
to the final towers.
 Then the slush transfer to the machine where work’s is
in progress for making of paper.

13. • In the finishing house the paper reel is transfer
from machine to revinder where the cutting reel
size by the knives.
• Then it transfer to the cutter machine where the
sheet cutting of paper reel as required size
• Then binding of sheets is done and then
dispatches.
• It is the paper processes that occur after the
complete of papermaking operations, including
calendaring, slitting, rewinding, sheeting,
trimming, sorting, etc., prior to shipment from
the facility.

14. 1. RADIAL DRILLING MACHINE
2. SHAPER MACHINE
3. LATHE MACHINE
4. MILLING MACHINE
5. CNC GRINDING MACHINE (ROLL GRINDING
MACHINE)
6. RADIAL DRILLING MACHINE

15. i. SYNCHRONOUS MOTOR
ii. INDUCTION MOTORS

16.  for choosing induction or synchronous
motors for industrial applications such as
paper mill
 The sizes are 1,000 to 3,000 HP, and the
voltage is 2.4-kV.
 The mill is served by a 33 MVA 115/12.47-kV
transformer, and the expansion will require
the installation of a second 33 MVA
transformer and second 12.47-kV bus.

17.  LOW SPEED AND HIGH H.P
 POWER FACTOR
 CONSTANT SPEED
 EFFICIENCY

18.  If we consider a 1000 HP, 8 Poles motor
working 24 Hrs, 7 days a week:
 Typical average efficiencies and then kWH
consumptions in one year are:
 Induction Motor (EFF =93.8);
kWH= (1000 * .746 / 0.938 )*365*24
= 6,966,908
 Synch. @0.8 PF (EFF=94.2);
kWH= (1000*.746/0.942)*365*24
=6,937,325

19.  Synch. @1.0PF (EFF=95.1);
kWH= (1000*.746/0.951)*365*24
=6,871,672
 Assuming energy cost $0.05 dollars per kWH,
the yearly electric bill becomes:
 Induction ---------- $348,345
Synch @ .8PF-------$346,866
Synch @1PF -------$343,583

20. synchronous motor drive

21.  Wound field motor
(a)cylindrical rotor wound field motor
(b) salient pole rotor wound field motor
 Permanent magnet motor
 Synchronous reluctance motor
 Hysteresis motor

22.  Modes of adjustable frequency control
(i) Open loop volts/HZ control (or) separate cotrolled
(or) true synchronous mode
(ii)self-controlled mode

25.  Supply Frequency to the synchronous motor is
controlled from the inverter which receives its firing
pulses from a frequency controlled oscillator.
 The machine will exhibits conventional behavior.
 Up to base speed the motor operates at constant
torque and above base speed are obtained by
clamping the voltage at rated voltage. Frequency can
be increased and the motor operates in flux
weakening region

26.  Control can modify the angle between the flux
phasors
 Because of self-control, machine does not show any
stability or hunting problem of traditional
synchronous machine
 The transient response is fast – similar to dc machine
 The rotor inertia is smaller than dc machine with high
energy magnet

28.  Commutation of the converter feeding the motor is controlled
through the rotor position information from a shaft encoder.
 Under over excitation the motor voltages can be employed to
commutate the thyristors at the inverter. Now the inverter
becomes simple. But at low speeds commutation assistance is
required.
 Rotor position is sensed and the firing signals to the devices
are synchronized to the motor position.
 For every 600 rotation of the rotor a new device in the
sequence is fired

31.  VSI FED DRIVE
 CSI FED DRIVE

38.  A Synchronous motor in self controlled mode is
called “commutator less Dc motor”.