1. Submitted by:
S.ABDULLAH
T.DEVA SUDAN
S.SAKTHIYUVARAJ
R.SATHISH
Supervisor:
Mr. C.R Tamizhanambi,M.S
AP/EIE
Mahendra Engineering College
De-inking Plant Final Tower Controls Using
SIEMENSPLC

2.  The DIP is nothing but de-inking plant (i.e.) removing the ink
from the waste paper and converted into pulp
 It is a newly commissioning plant, now the plant is prepared
with the DCS control system
 The cost of the components used in the control system are also
high. In DCS
 So That we are introducing the programmable logic controller
(PLC) to the control system
 By controlling the Parameters like Level, Flow,
 and Consistency (Tower Dilutions & Trim Dilution).
 This automatic control system greatly improves the safety of
production in paper industry.
Abstract

3. Introduction
 The DIP is nothing but “De-inking plant” (i.e.) removing
the ink from the waste paper and converted into pulp
 which is stored in the dip final tower.
 The dip final tower provides a raw material, which is
used for preparing the paper.
 It is one of the raw material, which is mixed with the
other raw material with certain proportion to produce the result.

4.  After preparing the raw material in final tower, it
should be carried to the receiving chest of a paper machine.
 The paper machine is nothing but the area which
consists of serious of segment and portions carried out to
manufacture the paper.
 The preparation of raw material and transmission of
those raw material to the receiving chest are controlled by
certain parameters like Level, Flow,and Consistency (Tower
Dilutions & Trim Dilution).
 In our project we are controlling and maintaining
those parameters to produce the fine result.

5. Existing system
ADVANTAGES OVER EXISTING METHOD IN TNPL:
 In TNPL, it is a newly commissioning plant, now
the plant is prepared with the DCS control system.
 So that interlocks between the control components
are high.
 The cost of the components used in the control
system are also high.
 So That we are introducing the programmable logic
controller (PLC) to the control system.

6. Proposed system
 By using PLC we are acquiring so many benefits including
the interlocks which is quietly reduced and the cost also gets
reduced.
 A PLC system we are controlling less number of inputs and
outputs.
 which is more than enough for our project and the scan
time of a system gets reduced which improves the speed of the
control system.
 By improving the speed of a system ,the production
of raw material for preparing the paper in DIP also gets increased

7.  (i.e.)the production gets increased 40% more than
the existing output in TNPL, so that profit acquired by
introducing our project gets increased by 1/4th of the existing
income.

8. Block diagram

9. FINAL TOWER:
 The Bulk Amount of Finalized Pulp Is Stored In a Large
Tank Known as Final Tower
RECEIVING CHEST:
 The Stored Pulp from the Final Tower is pumped to the
Small Tank (i.e.) receiving Chest, Where the Pulp Is Transferred
to Carry out Serious of Segment to Manufacture the Paper.
Process

10. PARAMETERS:
 The Parameters to Be Controlled and
Maintained Are Level, Flow, Consistency (Tower
Dilutions & Trim Dilution).
PROCESS:
 The de-inking pulp which is started in the final
tower can be transmitted to the Receiving chest, before that
the level of the tower is controlled.
 If it is 90% of Level is filled means the pulp
transmission gets starts and agitator starts rotating.
 If the level is below 10% then the agitator shut off and
there isnoTransmissionoccurs allthevalves getclosed.

11.  The transmission of pulp first pass through suction valve
(on-off valve) suctioning the pulp gives it to the pumping process (motor),
pumps the pulp into the receiving chest over delivery valve, in case if any
consistency ofpulpis varied, pumpgetsdamaged.
 Therefore trim dilution control valve is opened, where the
wateris mixedwith pulptogetoperating consistency.
 Dependingonthelevel ofreceivingchestthepumpedpulps
are controlled by control valves in the input of receiving chest the same
process willbeobtained inremaining receiving chest.
 At last stored pulp in receiving chest are transmitted to the paper
machines.

12. Result

14. LITERATURE REVIEW

16. Since there are many production plant in TamilNadu
News Prints and Paper Limited.
DCS is used for production in TNPL.
Thus we are using PLC in this project instead of DCS
to increase the production in low cost and to give
successful result in simulation.
CONCLUSION