Overview Unit Utilities

Presented By: Nur Mutiara Syahrian

14 November 2022

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Produk Unit Utilities

Compressed A I R
Instrument air & Plant air

WATER
Fresh water, Demin water,
Cooling water

STEAM
UTILITIES 3,5kg (Deaerator), 8kg (Tracing), 15kg
(Heater), 36kg (Turbin - Heater)
Process to prepare all “non process material”
which is needed by the plant
Support G A S
N2 liquid & gas

ELECTRICITY
Gas turbine & fuel oil turbine
 AUXILIARY
RPA (Rumah Pompa Air)
RWC-WTP-WTU
DEMIN SYSTEM
CW SYSTEM

PPTL

UTILITY BOILER PACKAGE

WHRU (Waste Heat Recovery Unit)
Air compressor
N2 Plant
Gas Turbin Generator

DISTRIBUTION
Distribute to utility, all of
production units, Perumahan,
Kantor
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Diagram Alir Proses

Service Water
RPA CW Sirkulasi
RWC Cooling Tower

Drinking Water RU III,

HSE TC, PSG
CW OT Fire Water
WTP

CAF Cation Exchanger Anion Exchanger Mixed Bed

Kilang, HSETC,
Perumahan PL Listrik
& SG, PSG

Mixed Gas Deaerator Demin

Water
WHRU
Gas Turbin

Steam 36 kg/cm2G Distribusi

Package Boiler

Udara Air Compressor Nitrogen Plant N2 Gas & Cair

Service Air
Instrument Air
Bahan Unit Proses Produk
RPA 1 Cooling Water Once Through CDU Utara

RPA 2 Cooling Water Once Through CDU Tengah

RPA 3 Cooling Water Once Through CDU Tengah Idle

WTP PLAJU Cooling Water Make up Cooling Water Circulated Plaju
RWC I : 1100 T/h CW PL : 12000 T/h
RPA 4 RWC II : 1100 T/h
Activated Carbon Filter injeksi Clorin Treated/ Clean Water Plaju
Idle PL :4 X 100 T/h

Demin Plant Plaju Demin Water Plaju

3 X 100 T/h
Raw Water
WTP SG Cooling Water Currently not Make up Cooling Water Circulated SG
WTU SG : 400 T/h CW SG : 4000 T/h Demin Plant SG
operated. Demin
is not
tank operated.
water plaju
RPA 5 DWP II : 150 T/h So transferred
transferred to
Activated Carbon Filter injeksi Clorin fromtank
demin Demin
SG Treated/ Clean Water Plaju
SG :1 X 150 T/h Plant Plaju

Demin Plant SG Demin Water SG

35-40 T/h

PB (PS-2) Steam 42 kg/cm2

2 X 50 T/h

WHRU Steam 42 kg/cm2

3 X 60 T/h

Compressed Air Unit

Air Instrument Plant Air Instrument

Udara
6 Unit Compressor
Kap Total : 26100
Nitrogen Plant Nitrogen Gas & Liquid

Gas Turbin
Listrik 50 Hz
Fuel Gas 3 X 31 MW

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 Auxiliary-Rumah Pompa Air (RPA)
Sungai Komering

Fungsi : RPA 1 RPA 2 RPA 3 RPA 4 RPA 5 & RPA

(Idle) 6 (Idle)
Untuk menyediakan
kebutuhan air untuk Cooling Cooling Cooling Utility Plaju Utility
keperluan kilang Water OT Water OT Water OT (RWC I & Sungai
CD Utara CD Tengah Gas Plant RWC II(Idle)) Gerong,
& OM dan
Parameter UOM Spesifikasi Cooling
Water OT
pH - 6.3-7 CD VI
Turbidity NTU 10-45

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 Auxiliary-Water Treatment Plaju
Kapasitas : Make Up
RWC I : 700 t/h CT Plaju
RWC II (Idle)
Cooling Tower
120-150 t/h
Deaerator
Plaju
Demin
Plant SG
Sungai Demin Plant
Komering RPA 4 RWC I 150 t/h
RWC II Air bersih
(Idle) perumahan dan
perkantoran plaju
Treated Water
(400 t/h)

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 Auxiliary-Water Treatment Sungai Gerong
Make Up
CT SG
Kapasitas :
WTU SG : 280 t/h CWOT CD VI Cooling Tower
DWP II : 150 t/h

Demin Plant
(Idle)
Sungai WTU SG
Komering RPA 5
Air bersih
perumahan dan
perkantoran SG
Carbon FIlter
Air bersih
perumahan SG
DWP SG
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Water Treatment (Typical Process Flow & Equipment)
Polyelectrolyte

CHEMICAL NaOH M
INJECTION
Chlorine

Aluminium Sulfat

SERVICE
WATER
SPLITTER BOX

/ To Demin Plant
/
CLARIFIER
COOLING
GRAVITY SAND CLEARWELL WATER

/
FILTER MAKE UP

Raw water BLOWER /

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 Chemicals Fungsi
Aluminium Sulfat Koagulan : Destabilisasi muatan elektrosatis partikel (tolak
(Alum) menolak  netral) memungkinkan partikel untuk menyatu

Poly electrolite Coagulant Aid : mempercepat proses koagulasi dan

memperkeras flok yang terbentuk

NaoH Adjust pH. pH pada clarifier dijaga pada range 5.5-6

Pada range pH tersebut, flok yang terbentuk bersifat lebih berat
daripada air

Chlorin Sebagai Desinfektan

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 Auxiliary - Demineralization Unit
Demin Plaju
Kapasitas : 150 t/h
Water from
Clear Well
Water from
Tank
Clear wall tank

Demin Water
*Nb
Resin Kation dan Anion : Carbon Filter Cation Exchanger Anion Exchanger Mixed Bed
- Polymer Styrene
- Dyvinil Benzene
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 Alat Fungsi
Carbon Filter Untuk mentreatment filtered water supaya bebas dari
suspended matter, oil, algae, slime, turbidity, carry over flock,
dan chlorine serta menghilangkan warna, rasa, dan bau
Kation Exchanger Untuk menghilangkan ion positif (Kation).
Reaksi :
R-H+ + Na R-Na
Ca  R-Ca + H+
Mg R-Mg
Anion Exchanger Untuk menghilangkan ion negative (Anion).
Reaksi :
R-OH- + Si2+ R-HSiO2
CO3 2-
SO4 H2O
SO42-  Cl2 + NaOH
NO3- HCO3 SiO2
Cl-
Mixed Bed Untuk menghilangkan ion-ion yang tidak dapat dhilangkan pada
cation dan anion exchanger

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Parameter Feed Raw Water Treated Water Demin Water

pH 6,3-7 6,5-7,5 5.8-6.2

Turbidity (NTU) 10-45 Max. 2

Conductivity (μs/cm) Max. 300 Max. 1

Silica (ppm) Max 50 Max. 0,01

Residual Chlorine Max. 2

(mg/l)
T. Hardness (ppm) Max. 500

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 Auxiliary-Cooling Tower
CT Plaju : CT Sungai Gerong :
Kapasitas : 8000 T/h Kapasitas : 3500 T/h
Lube/Seal Oil Cooler HVU II
Instrument Air Compressor FCCU CW Return
Sample Cooler SWS
Surface Condenser
Polypropylene & Alkilasi Corrosion Inhibitor
Scale Inhibitor Chlorine
Chemicals Fungsi NaOH
Chlorine Oxidizing biocide yang berguna sebagai Biocide
desinfektan
CW Supply
CW Make Up
Spectrum NOX Non Oxidizing biocide yang berguna sebagai
1108 desinfektan
NaOH pH Adjusment dijaga pada range 7.5-8.5
- Untuk memaksimalkan kinerja Chlorine (7.5-
7.8)
- Untuk menjaga corrosion rate

Zn SO4 Corrosion inhibitor

Phospate Corrosion inhibitor

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No. Parameter Unit Nilai
1. pH - 7-8.5
2. Conductivity (μs/cm) Max. 2000
3. Silica Ppm Max. 130
4. Konten Fe Ppm Max. 2
5. Residual Ppm 0,25-0,5
Chlorine
6. Turbidity NTU Max. 20
7. Ca-Hardness ppm Max. 250
8. Total Alkilinity Ppm Max. 250
9. Total Ppm 6-9
Phosphate
10. Corrosion Rate Mpy Max. 2
11 Total Colonial Koloni/ml Max 104
Bacteria
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 PPTL- Steam Generator
Package Boiler
Chemicals Fungsi (2011 UA/UB)
2 Unit (@ 50 T/h)
DEHA 1. Oxygen Scavenger
Diethyhidroxil 4(C2H5)2NOH + 9O2 
amine 8CH3COOH + 2N2 + 6H2O
58 T/h Steam
Demin
2. Maintain PH 40 kg/cm2
3. Passivation  mencegah Water
Phospate
korosi sebelum masuk ke
boiler LP steam
(3,5 kg/cm2g)

DEHA
Morpholine Adjusting PH to avoid Morpholine
corrosion Deaerator
Boiler WHRU
Phospate Untuk mengatur hardness Feed Water
air
T = 120°C (2010 UA/UB/UC)
P : 0,85 Kg/cm2 3 Unit (@ 60 T/h)

Notes : 66 T/h Steam

- Running : 1 PB dan 2 WHRU 40 kg/cm2
- WHRU 2010 UB sedang maintenance Phospate

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Boiler Feed Water Specification
Parameter Demin Boiler Feed Boiler Water Steam
Water Water (Superheated
dan
Saturated)

pH 5.8-6.2 8-9,5 9,5-11 8-9,5

Silica (ppm) Max. 0,01 Max. 0,2 Max. 20 Max. 0,02

Conductivity Max. 1 Max 20 Max. 600 Max. 10

(μs/cm)
Residual 0,08-0,12 -
DEHA (mg/L)

Phosphate 5-15

Total Alkilinity Max. 150

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PPTL-Plant Air & Instrument Air
Nitrogen Plant

Nitrogen

KO
Drum Plant
Compressor Air
Air

6 Unit
(Cap Tot : 26100 Nm³) Dryer

Instrument
Air

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PPTL-Nitrogen Plant N2 Gas
Kapasitas N2 Plant : 3300 Nm3/H LP : 7 kg/cm²

HP :
Compresso Cold 29kg/cm²
r Box
Air Vaporizer

MS
Adsorber
N2
Storage
Chiller N2 Liquid
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PPTL – Power Generator

Gas Turbin-Generator Steam Turbine Diesel Generator

(GT 2015 UA/UB/UC) Cap : 3,2 MW Cap : 0,75 MW
Cap : 31,1 MW P : 8,5 kg/cm2 Frekuensi : 50 Hz
2 Unit Running – 23 MW
Frekuensi : 50 Hz

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Terima Kasih

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