The document provides a comprehensive overview of the Sour Water Stripping Unit (SWU) and the Amine Unit, detailing their processes, instrumentation, and purpose. It outlines the removal of toxic components like hydrogen sulfide (H2S) and ammonia (NH3) from sour water and gas, as well as the modifications and equipment used in both units. Additionally, it includes specific details on various control systems and gas detection technologies employed to ensure safety and efficiency.

2.  INTRODUCTION

4. Instrumentation on SWU & Amine
Single Line Flow Diagram of Amine
Amine
Instrumentation On Buffer Tank
Oil Floating Skimmer
Buffer Tank
Process Description OF SWU
Single Line Flow Diagram Of SWU
SWU Purpose

5.  SOUR WATER STRIPPING UNIT
Sour water generated from
Upstream and Downstream
units of Refinery.
Hydrogen Sulfide (H2S) and
Ammonia (NH3) are Toxic
Components that are Present in
Sour Water. These toxic
components should be removed
from Sour Water before reused
the water in plants or Drain.

6.  Single Line Flow Diagram of SWU

7.  Process Description Of SWU

9.  MODIFICATION IN SWU

10.  Instrumentation On Buffer T-501
Instrument
Level Transmitter Krohne Optiwave
Model: 5200F
(Unguided Parabolic)
Level Gauge Board & Float Type
Pressure Gauges Make : WISE
0-1 kg/Cm2: 01 No
0-15 kg/Cm2: 02 No
Pressure
Transmitter
Yokogawa
Temperature Gauge WIKA
Range: 0-100C
PRV 2 mmH2O (Not yet installed)
Breather Valve 2 6” mmH2O Gauge
1” mmH2O Vacuum
Gas Detector Gastron H2S Gas
6 Nos

11. Nitrogen Blanketing And PRV
Tank Blanketing system was introduced by
(ACE) Appalachian Controls Environmental
in 1970. Now this Closed Tank Blanketing
System used in the Globe.
Nitrogen Gas (N2) are mostly used in Tank
Blanketing System.
The Purpose of Tank Blanketing are ,
• To prevent contact with oxygen and as
a way to avoid potentially hazardous
conditions.
• Maintain positive pressure

12.  Oil Floating Skimmer
Oil Suction Floating Skimmer
Installed in Buffer Tank for Collecting
Separated Oil and Hydrocarbons in
Tank.
Skimmer Float in Tank on Different
Operating Level.
Separated Oil Collected in Oil
Collection Header through Suction
Floating Skimmer and then Drain in
Close Drain System.

13.  AMINE
Amine Unit is a Sour Gas Treating Unit
Where's we convert Sour Gas into
Sweet Gas for Re-use Purpose. This
Process is know as Gas sweating
process. Feed of Amine unit are comes
from ISOM HDS REFORMER Plants.
Sour Gas which consists of Hydrogen
Sulfide (H2S) and Carbon Dioxide (CO2).
At Amine Plant we use various
Alkyamines to remove H2S and CO2
from Sour Gas.

14. Diethanolamine
Monoethanolamine
Methyldiethanolamine
Diisopropanolamine

16. AMINE PROCESS DESCRIPTION
• Sour gas enters to Scrubber for Removing Oil Particles.
• After that Sour gas routed to Amine Contactor.
• In Amine Contractor Lean Amine Come from Top of Trays.
• Lean Amine Absorb H2S & Co2 from Sour Gas and become the Rich Amine.
• After that H2S free Gas (Sweet Gas) out from Top of Amine Contractor to Knockout Drum.
• In Knock Out Drum any Possible amine Particles retained and the Sweet Gas Routed to
Gas Gathering.
• Rich Amine then will be draw from Bottom of Contractor to Rich Amine Flash Drum.
• Rich Amine Flash Drum Remove H2S from Rich Amine through Pressure Swing.
• H2S routed to Acidic Flare on Top of Rich Amine Flash Drum.
• After that rich amine Routed to amine Regenerator where use Heat and Steam as
Stripping of H2S.
• H2S Routed to acidic Flare and Bottom of Regenerator Lean amine Received.
• After that Lean amine Routed to Storage Vessel goes through Exchanger and Condenser.
• Cycle Complete. We use Lean Amine in amine Contractor for Removing H2S Continuously.

17. INSTRUMENTATION ON AMINE & SWU
Instruments Company Amine SWU
Control Valve Komoto 12 6
Pressure
Transmitter
Rosemount 6 5
Temperature
Transmitter
Rosemount 11 (PT 100) 11 (PT 100)
Flow Transmitter Rosemount 9 4
Level Transmitter Masonalian 12400 5 4
Gas Detector Gastron 19 8
Pitch Controller Fisher DVC 6205 2 1

18. CONTROL VALVE
Company Komoto
Body Globe
Model AO-3607
Flow Character EQ%, Linear
Actuator Diaphragm Type
Fail Safe Open
Positioner DVC6200HC
Body Color Silver body, Green Actuator

19.  PRESSURE TRANSMITTER
Specifications
Company Rosemount
Range 0 to 2500 mmH2O
Sensor Diaphragm
Transmitter Pizo-Resistive
Accuracy ±0. 15%

20. General Data
Company Masoneilan
Model 12400
Working Principle Archimedes
principle
Feature Both Analog and
Digital
Measurement Level or Interface
Level
Accuracy 0.1%
Protocol Hart
Communication
IP 67

21.  TYPES OF GAS DETECTORS AT AMINE &
SWU
Detector Company Model SWU Amine
HC Gastron GTD-2000Ex - 6
H2S Gastron GTD-2000Tx 6 15
NH3 Gastron GTD-2000Tx 2 -

22.  TOXIC GAS DETECTOR
Company Gastron
Model GTD-2000Tx
Type Diffusion
Gases H2S NH3
Sensor Electro-chemical
Cell
Range 0 to 100 ppm
Response Time Less then 45 sec
Accuracy ±3%
Output 4 to 20 mA
Area Classification Exd IIC T4-T6 IP-
67

23.  HYDROCARBON DETECTOR
Company Gastron
Model GTD-2000Ex
Type Diffusion
Gases HC
Sensor Catalytic Cell
Range 0 to 100% LEL
Response Time Less then 15 sec
Accuracy ±3%
Output 4 to 20 mA
Area Classification Exd IIC T4-T6 IP-
67