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BEC Group of Companiesc/o 18 Boon Lay Way
TradeHub 21Singapore 609966
Tel: +(65) 6778 6858
Website: www.be-con.comEmail: [email protected]
Cert No: QS - 2009 - 14
Member of the IAF MLA for QMS
Owner
Shell Eastern Petroleum Pte Ltd
Chimney EPC Contractor
Balanced Engineering & Construction Pte Ltd
CASE STUDY SULPHUR RECOVERY
UNIT PROJECT
CHIMNEY DESIGN AND BUILD
Shell Eastern Petroleum Pte Ltd was building a Sulphur Recovery Unit on Shell’s Pulau Bukom Refinery. Plant Engineering Construction Pte Ltd was the main contractor for the project.
ProjectParticipants
Sulphur Recovery Unit ProjectThe world is increasingly dominated by high-sulphur, heavier crudes and a changing product mix with tighter product specifications and more stringent environmental regulations. Refiners are therefore required to adjust their sulphur management strategies, introduce new sulphur recovery solutions and upgrade existing refineries. Effective sulphur recovery is a vital tool for optimising environmental performance in refinery operations. Shell has provided high-level sulphur recovery unit (SRU) designs for many years based on the Shell Claus Off-gas Treating (SCOT) system. The SCOT process allows conversion of over 99.9% of the sulphur compounds fed to the SRU to elemental sulphur. New features in the SCOT process allow it to consume less energy through better catalytic systems and to treat lower concentrations of hydrogen sulphide in the treated gas.
Detail of work by BECBEC was involved in the Design & Build of the chimney, including piling, pilecap, slipform, heavy lifting of roof, floors and flues, installation of internal rack and pinion hoist, AWL’s, internal lighting, lightning conductor, earthing works.
Challenges• Extremely limited space available for the construction of this stack inside the live SRU refinery area • Considerable coordination with refinery operations to ensure no delays or stoppages to the live refinery • Specialised construction techniques involved to construct this chimney inside the live refinery area
SU
LPH
UR
RE
CO
VE
RY
PLA
NT
#10-159/162 Fax: +(65) 6690 9259
Lining System
A517 GR70
SRU stack elevation
100m
3
3
1.05m
6.3m – 6.0m
24 Nos. x 356 x 356 x 134kg/m
10.1m x 2.0m deep
Chimney data:
Height
No. of internal steel flues
No. of internal platforms
Diameter of internal flues
External concrete diameter
Piles
Pile cap
Completed chimney Slip forming rig assembly
Slip forming in progress Chimney construction in progress
Installing and hanging the first liner can
5.00 PBDL
8.80
EXPANSION JOINT ONOUTSIDE BY OTHERS
20.0m
+50.00
4 NO.– 1000 X 1000 AWL OPENINGS
+61.00
16 NO. 500 WIDE X 2000 HIGH LOUVRED VENTILATION OPENINGS
97.50
104.00
AIRCRAFT WARNING LIGHT
INTE
RNAL
DIA
MET
ER
WAL
L TH
ICKN
ESS
EXTE
RNAL
DIA
MET
ER
250
Ø600
0
VARI
ES 4
00 –
250
AT
5mm
/m O
N O
UTSI
DE F
ACE
VARI
ES Ø
6300
– Ø
6000
400
Ø630
0
3800
C
2900 X 3800 LOUVRED ACCESS OPENING
Ø550
0
2900
