Clo2 system Construction at L-STN DEWA JAPS , Dubai , UAE

1. SUPPLY , INSTALLATION & COMMISSIONING OF CHLORINE DIOXIDE (CLO2) GENERATING SYSTEM
FOR DEWA L-STATION, JEBEL ALI

2. MAIN CONTRACTOR
DUBAI ENGINEERING COMPANY. (DECO
GROUP)

3. ISIA S.P.A
CLIENT
DUBAI ELECTRICITY & WATERAUTHORITY
(DEWA) .

4. THE CONCEPTION OF THE
PROJECT
THIS SYSTEM IS ABLE TO PRODUCE THE CHLORINE
DIOXIDE CLO2 QUANTITY REQUIRED FOR THE
TREATMENT OF BOTH POTABLE WATER TREATMENT
SYSTEM AND PRODUCT WATER STORAGE SYSTEM.
CHLORINE DIOXIDE IS GENERATED ACCORDING TO
THE FOLLOWING REACTION:
5 NACLO2 + 4 HCL 4 CLO2 + 5 NACL + 2 H2O

5. PROJECT STAGES
DESIGN PRE-
CONSTRUCTION
PROCUREMENTCONSTRUCTION
AND BUILDING
COMMISSIONING OWNER
HANDOVER

6. Design

7. Civil foundations System design
Design

8. Pre-Construction

9. Constructi
on
Scope of
work
Project
Material
Permits
and
Inspections
Project
Details
Project
Team
Project
Budget

10. Procurement
& Material arrangements

11. Material delivery to site

12. Arranging material at Site

13. Unpacking material and inspection

14. Construction and building
I. Civil Constructions
II. Tanks and container installation.
III. Mechanical erections.
IV. Electrical installation.
V. I&C installation.

15. Safety First.
- The Project started at very critical time and it was big challenge to get our work done with the spread
of the Covied-19 without spreading the infection among team members .
- And our great safety achievement was implementing +1000 of working hours with 0 recorded infection
cases and
0 accidents .
- Daily Activities TBT carried at the site for team awareness of daily activities and how to finish their
duties safely .
- Daily Covied-19 TBT AS per ASME (The American society of Mechanical Engineers) - OSHA Guidelines
for Engineers working during the Pandemic

16. Implementing daily TBT at
site .

17. I. Civil Constructions .
Steel reinforcement and
shuttering

18. Casting pedestals and dyke walls

19. Leakage test for dyke walls

20. Acid resistance tiling works

21. Grouting, resin and epoxy coating

22. II. Tanks and container installation.
GRVe Tanks Delivery and installation
- 2 GRVe tanks with 21.5 Cubic. Meter capacity ,one tank for HCL and other one for Naclo2 .
- Fume trap for HCL fumes
- Tanks Specs : DIA 2200 X 5835 (SHELL HEIGHT) .

23. II. Tanks and container installation.

24. II. Tanks and container installation.

25. III. Mechanical erections.
Plumping works , supports and general installation

26. III. Mechanical erections.
Plumping works , supports and general installation

27. III. Mechanical erections.
Plumping works , supports and general installation

28. III. Mechanical erections.
Plumping works , supports and general installation

29. III. Mechanical erections.
Installing Skids and its accessories.

30. III. Mechanical erections.
Reactors assembling.

31. III. Mechanical erections.
Reactors Installation.

32. III. Mechanical erections.
Reactors Installations.

33. IV. Electrical installation .
Laying power cables and electrical tie in with DEWA

34. IV. Electrical installation .
Laying Power cables and electrical tie in with DEWA

35. IV. Electrical installation .
Panels Installations, glanding and termination

36. IV. Electrical installation .
Laying Power cables and electrical tie in with DEWA

37. IV. Electrical installation .
AC / Exhaust Fans / Lighting Installations

38. V. I&C installations.
Installing Cables & Instrumentation
devices
Level transmitter
Level Switch
Clo2 Analyzers
Magnetic levels

39. V. I&C installations.
Installing Signal Cables &
Instrumentation devices
Pressure Gauges
Ultra sonic flow meter

40. V. I&C installations.
Tie in with DCS

41. V. I&C installations.
Laying FO cables to Establish Connection between the field and DEWA CCR for Full controlling and monitoring
the system.

42. V. I&C installations.
FO cable Splicing and OTDR testing

43. I&C installations.
Programing the PLC and HMI

44. I&C installations.
System Configuration and startup

45. Commissio
ning

46. Commissioning
Cold Check , Loop test and megger cables .

47. Commissioning
Piping Hydrotest& tanks Water filling

48. Commissioning
Energizing Panels and testing Power feeders .

49. Commissioning
AC Commissioning

50. Commissioning
Instrumentation calibration
HCL fume detectors Clo2 Fume detectors
Flow switch Flow switch

51. Commissioning
Instrumentation calibration
Ultra sonic flow meter
Clo2 analyzers
Magnetic level

52. Commissioning
testing Interlocks & Alarms

53. Commissioning
Skids testing

54. Commissioning
Chemical Commissioning & System Efficiency test
Naclo2 Filing
HCL filling

55. Commissioning
Chemical Commissioning & System Efficiency test
Yielding Test
• Sampling Clo2 From Reactors with the c
and Approved 3rd party laboratory
• Testing Clo2 Concentration and system

56. Commissioning
Recallability Running
24 H Running
As Per Contract system
put in service for 24 H/
60 days as reliability
running process under
DECO monitoring and
operation .

57. Commissioning
System in Service
New Clo2 System at L-STN is Serving at DE
Jable ali , JABS
System is serving desalination Plant at L-ST
L1 & L2
Clo2 is serving
• around 11000 m3/h at L1.
• And 5000 m3/h at L2 .

58. Owner Handover

59. Owner Handover
- Operation training for DEWA operation shifts .
- Maintenance Training for DEWA maintenance te
.
- 60 days reliability running for the system .
- Handover System manual documents .
- System handover to DEWA .

60. Ahmad Moharram
Project Engineer
Moharam@decoae.com
+971563280261
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