1. COMMISSIONING DEPARTMENT, NTPC-SIPAT
Devdeep Bose
DGM ( Commng & Testing)
COMMISSIONING DEPARTMENT, NTPC-SIPAT

2. COMMISSIONING DEPARTMENT, NTPC-SIPAT

3. COMMISSIONING DEPARTMENT, NTPC-SIPAT

4. COMMISSIONING DEPARTMENT, NTPC-SIPAT

5. COMMISSIONING DEPARTMENT, NTPC-SIPAT

6. COMMISSIONING DEPARTMENT, NTPC-SIPAT

8. INTRODUCTION TO SUPER CRITICAL UNI -

9. COMMISSIONING DEPARTMENT, NTPC-SIPAT
POINTS OF DISCUSSION
SUB CRITICAL & SUPER CRITICAL BOILER
SIPAT BOILER DESIGN
SIPAT TURBINE DESIGN
DESIGN PARAMETERS
COMMISSIONING
PRE COMMISSIONING PROBLEMS
POST COMMISSIONING PROBLEM
COMMISSIONING DEPARTMENT, NTPC-SIPAT

11. COMPARISION OF 660 MW Vs 500 MW BOILER
Description
unit
660
500
S/H STEAM FLOW
T/HR
2225
1625
SH STEAM PR
KG/CM2
256
179
SH STEAM TEMP 0C
540
RH STEAM FLOW
1742
1397.4
RH STEAM TEMP INLET
303.7
338.5
RH STEAM TEMP OUTLET
568
RH STEAM PRESS INLET
51.17
46.1
FEED WATER TEMP
291.4
255.2

12. Tonnage Comparison
Description
660 MW
500 MW
Structural Steel Erection
7383
9200
Boiler Proper & Accessories (Pre. Parts)
7080
5300
Refractory, Insulation & Cladding
1410
2000
Power Cycle Piping
3032
2200
Soot Blowing System 54 76
Coal Firing System
3573
Draft System
5275
5200
Fuel oil system 62
200
Miscellaneous System
130
280
Electrical & Instrumentation
282
380
TOTAL
28281
26836

13. Material Comparison Carbon Steel T11, T22 T22, T91,T11 T11 24,000 Nos
Description
660 MW
500 MW
Structural Steel
Alloy Steel
Carbon Steel
Water wall
T22
SH Coil
T23, T91
T11, T22
RH Coil
T91,Super 304 H
T22, T91,T11
LTSH
T12
T11
Economizer
SA106-C
Welding Joints (Pressure Parts)
42,000 Nos
24,000 Nos

14. Structural Comparison
Slno
660 MW
500 MW
Remarks 1
STRUCTURALS a
Entire structural is bolting type- entire structure is bolted. Holes are drilled on the columns and gusset plates, and supplied with matching plates.
Structural is assembled at site with welding
Advantages (660MW) of Bolting structure:
Fast in erection.
Clean environment
No Welding network required
Safety at site
Painting finish is good
( No Weld surface) b.
No Welding work involved in assembly/ Erection , except Walkway rail post welding
Assembly is carried out with Welding
Can be dismantled if required
( For Maintenance purpose) c
Material supply is tier wise including staircases, railing, gratings etc.
Material is supplied as per the erection sequence.
Erection completion tier wise, including gratings, platforms , staircases etc.

15. COST COMPARISON 1.09 Cr 1.02 Cr 0.6Cr 0.63 Cr 1 Cost of SG Package
Cr with ESP 2
Cost of ESP
183.54Cr 3
Total cost of Boiler + ESP Cr Cr 4
Cost of Boiler per MW with ESP
1.09 Cr
1.02 Cr 5
Cost of TG for entire stage Cr Cr 6
TG cost per MW
0.6Cr
0.63 Cr

16. BOILER SPECIFICATION S/H STEAM FLOW T/HR 2225 SH STEAM PR KG/CM2 256
Description
unit
S/H STEAM FLOW
T/HR
2225
SH STEAM PR
KG/CM2
256
SH STEAM TEMP 0C
540
RH STEAM FLOW
1742
RH STEAM TEMP INLET
303.7
RH STEAM TEMP OUTLET
568
RH STEAM PRESS INLET
51.17
FEED WATER TEMP
291.4

17. = Boiler Efficiency
100% TMCR
86.27%
80% TMCR
86.60%
60% TMCR
86.68%
50% TMCR
86.91%
Quoted Turbine Heat Rate
100% Load
1904 Kcal / KWH
80% Load
1924 Kcal / KWH
60% Load
1973 Kcal / KWH
50% Load
2065 Kcal / KWH
Net Plant Heat Rate = NTRH
= KCal / KWHR ( at 100% TMCR)
80% TMCR = Kcal / KWHR
60% TMCR = Kcal / KWHR
50% TMCR = Kcal / KWHR
Plant Efficiency at 100% TMCR = 38.96%
80% TMCR = 38.7 %
60% TMCR = 37.78%
50% TMCR = 36.19%

18. COMMISSIONING DEPARTMENT, NTPC-SIPAT
STEAM GENERATOR
Supplier : M/s DOOSAN
Erection By : M/s L&T
COMMISSIONING DEPARTMENT, NTPC-SIPAT

19. UNDERSTANDING SUPER CRITICAL TECHNOLOGY
When Water is heated at constant pressure above the critical pressure, its temperature will never be constant
No distinction between the Liquid and Gas, the mass density of the two phases remain same
No Stage where the water exist as two phases and require separation : No Drum
The actual location of the transition from liquid to steam in a once through super critical boiler is free to move with different condition : Sliding Pressure Operation
For changing boiler loads and pressure, the process is able to optimize the amount of liquid and gas regions for effective heat transfer.
COMMISSIONING DEPARTMENT, NTPC-SIPAT

20. SUPER CRITICAL BOILER CYCLE WITH SH, RH & Regeneration
TEMP 1 3
568’C
600
540’C
256 Kg/cm2
500
Steam flow :2225 T/Hr
Steam temp : 540 ‘c
Steam Pres : 256 kg/cm2
RH pre : 51.6 Kg/cm2
RH Temp : 568’c
Feed water Temp : 291’c
400 2
300
200
100 5 4
ENTROPY

21. G SEPARATOR 540°C, 255 Ksc 568°C, 47 Ksc 492°C, 260 Ksc 457°C, 49 Ksc
FUR ROOF I/L HDR
ECO HGR O/L HDR
HRH LINE
MS LINE
411°C, 277Ksc
411°C, 275 Ksc
SEPARATOR
STORAGE TANK
FINAL SH
FINAL RH
LTRH
DIV PANELS SH
PLATEN SH
VERTICAL WW G
ECO JUNCTION HDR
LPT
LPT
IPT
305°C, 49 Ksc
CONDENSER
HPT
ECONOMISER
ECO I/L
Spiral water walls
BWRP
FEED WATER
290°C, 302 KSC
FUR LOWER HDR
FRS

22. Boiling process in Tubular Geometries
Steam
Partial Steam Generation
Complete or Once-through Generation
Steam
Heat Input
Water
Heat Input
Water
Water
Boiling process in Tubular Geometries

23. SIPAT SUPER CRITICAL BOILER COMMISSIONING DEPARTMENT, NTPC-SIPAT
BOILER DESIGN PARAMETER
DRUM LESS BOILER : START-UP SYSTEM
TYPE OF TUBE
Vertical
Spiral
SPIRAL WATER WALL TUBING
Advantage
Disadvantage over Vertical water wall
COMMISSIONING DEPARTMENT, NTPC-SIPAT

24. COMMISSIONING DEPARTMENT, NTPC-SIPAT
Vertical Tube Furnace
To provide sufficient flow per tube, constant pressure furnaces employ vertically oriented tubes.
Tubes are appropriately sized and arranged in multiple passes in the lower furnace where the burners are located and the heat input is high.
By passing the flow twice through the lower furnace periphery (two passes), the mass flow per tube can be kept high enough to ensure sufficient cooling.
In addition, the fluid is mixed between passes to reduce the upset fluid temperature.
COMMISSIONING DEPARTMENT, NTPC-SIPAT

25. COMMISSIONING DEPARTMENT, NTPC-SIPAT
Spiral Tube Furnace
The spiral design, on the other hand, utilizes fewer tubes to obtain the desired flow per tube by wrapping them around the furnace to create the enclosure.
This also has the benefit of passing all tubes through all heat zones to maintain a nearly even fluid temperature at the outlet of the lower portion of the furnace.
Because the tubes are “wrapped” around the furnace to form the enclosure, fabrication and erection are considerably more complicated and costly.
COMMISSIONING DEPARTMENT, NTPC-SIPAT

26. COMMISSIONING DEPARTMENT, NTPC-SIPAT

27. SPIRAL WATER WALL ADVANTAGE
Benefits from averaging of heat absorption variation : Less tube leakages
Simplified inlet header arrangement
Use of smooth bore tubing
No individual tube orifice
Reduced Number of evaporator wall tubes & Ensures minimum water flow
Minimizes Peak Tube Metal Temperature
Minimizes Tube to Tube Metal Temperature difference
DISADVANTAGE
Complex wind-box opening
Complex water wall support system
tube leakage identification : a tough task
More the water wall pressure drop : increases Boiler Feed Pump Power
Adherence of Ash on the shelf of tube fin

28. BOILER DESIGN PARAMETERS

29. BOILER OPERATING PARAMETER
FD FAN
2 No’S ( AXIAL )
11 kv / 1950 KW
228 mmwc
1732 T / Hr
PA FAN
2 No’s ( AXIAL)
11 KV / 3920 KW
884 mmwc
947 T / Hr
ID FAN
11 KV / 5820 KW
3020 T / Hr
TOTAL AIR
2535 T / Hr
SH OUT LET PRESSURE / TEMPERATURE / FLOW
256 Ksc / 540 C
2225 T / Hr
RH OUTLET PRESSURE/ TEMPERATURE / FLOW
46 Ksc / 568 C
1742 T / Hr
SEPARATOR OUT LET PRESSURE/ TEMPERATURE
277 Ksc / 412 C
ECONOMISER INLET
304 Ksc / 270 C
MILL OPERATION
7 / 10
COAL REQUIREMENT
471 T / Hr
SH / RH SPRAY
89 / 0.0 T / Hr
BOILER EFFICIENCY
87 %
COMMISSIONING DEPARTMENT, NTPC-SIPAT
COMMISSIONING DEPARTMENT, NTPC-SIPAT

30. Coal Analysis
High erosion potential for pulverizer and backpass tube is expected due to high ash content.
2. Combustibility Index is relatively low but combustion characteristic is good owing to high volatile content.
COMMISSIONING DEPARTMENT, NTPC-SIPAT
COMMISSIONING DEPARTMENT, NTPC-SIPAT

31. Ash Analysis
Lower slagging potential is expected due to low ash fusion temp. and low basic / acid ratio.
2. Lower fouling potential is expected due to low Na2O and CaO content.

32. BOILER CONTROL

33. Constant Pressure Control
BOILER LOAD CONDITION
Constant Pressure Control
Above 90% TMCR The MS Pressure remains constant at rated pressure
The Load is controlled by throttling the steam flow
Below 30% TMCR the MS Pressure remains constant at minimum Pressure
Sliding Pressure Control
Boiler Operate at Sliding pressure between 30% and 90% TMCR
The Steam Pressure And Flow rate is controlled by the load directly
COMMISSIONING DEPARTMENT, NTPC-SIPAT
COMMISSIONING DEPARTMENT, NTPC-SIPAT

34. COMMISSIONING DEPARTMENT, NTPC-SIPAT
CONSTANT PRESSURE Vs VARIABLE PRESSURE BOILER CHARACTERSTIC +1 -1 -2 -3 -4 20 40 60 80
100
Efficiency Change %
Boiler Load %
Variable Pressure
Constant Pressure
COMMISSIONING DEPARTMENT, NTPC-SIPAT

35. COMMISSIONING DEPARTMENT, NTPC-SIPAT
Benefits Of Sliding Pressure Operation ( S.P.O)
Able to maintain constant first stage turbine temperature
Reducing the thermal stresses on the component : Low Maintenance & Higher Availability
No additional pressure loss between boiler and turbine.
low Boiler Pr. at low loads.
WHY NOT S.P.O. IN NATURAL/CONTROL CIRCULATION BOILERS
Circulation Problem : instabilities in circulation system due to steam formation in down comers.
Drum Level Control : water surface in drum disturbed.
Drum : (most critical thick walled component) under highest thermal stresses
COMMISSIONING DEPARTMENT, NTPC-SIPAT

36. COMMISSIONING DEPARTMENT, NTPC-SIPAT
STEAM TURBINE K
LMZ (LENINGRADSKY METALLICHESKY ZAVOD)
K STANDS FOR KLAPAN LTD.,BULGARIA WHICH SUPPLIES TURBINE,NOZZLES,DIAPHRAGMS, SEALS,BLADES ETC.
COMMISSIONING DEPARTMENT, NTPC-SIPAT

37. COMMISSIONING DEPARTMENT, NTPC-SIPAT
1.TG DECK IS VIS SUPPORTED AND HAS 26 CONCRETE COLUMNS (T1 – T26).
2.TG HALL IS CONSTITUTED OF 3 MAINS ROWS OF COLUMNS – A,B ,C ROW AND TWO BAYS – AB BAY AND BC BAY. THE WIDTH OF AB BAY IS 36m AND BC BAY IS 12m
3.CONDENSER TUBE BANKS (CW PATH) HAS AN INCLINATION OF 40.
4.THERE ARE TWO MAIN EOT CRANES FOR TG HALL.EACH EOT CRANE IS HAVING A CAPACITY OF 200t FOR MAIN HOIST AND 20t FOR AUXILIARY HOIST. 35.5m IS THE MAXIMUM VERTCAL DISTANCE A HOIST CAN TRAVEL.TANDEM OPERATION OF TWO EOT CRANES ARE ALLOWED.
COMMISSIONING DEPARTMENT, NTPC-SIPAT

38. COMMISSIONING DEPARTMENT, NTPC-SIPAT

40. COMMISSIONING DEPARTMENT, NTPC-SIPAT

41. IP Turbine

42. LP Turbine

43. COMMISSIONING DEPARTMENT, NTPC-SIPAT

45. COMMISSIONING DEPARTMENT, NTPC-SIPAT
Ext. No
Source Of Extraction
Destination Equipments 1
13th stage of HPT
HPH-8 2
CRH
HPH-7 3
3rd stage of IPT
HPH-6 *
TDBFP 4
6th stage of IPT
DEAERATOR 5
8th stage of IPT
LPH-4 6
11th stage of IPT
LPH-3 7
2nd stage of LPT
LPH-2 8
4th stage of LPT
LPH-1
COMMISSIONING DEPARTMENT, NTPC-SIPAT

46. COMMISSIONING DEPARTMENT, NTPC-SIPAT
Condenser
Design LMZ
Design CW Flow m3/hr
Vacuum 77 mm Hg (abs) at 33 0C
89 mm Hg (abs) at 36 0C
No. of passes 1
Total no. of tubes (OD)x0.71 (t)
(OD)x1.00 (t)
Tube material ASTM A-249 TP 304
Rated TTD 3.40C
DT of CW 100C
COMMISSIONING DEPARTMENT, NTPC-SIPAT

47. Condensate Extraction Pump
Design flow rate Kg/s
Discharge pressure Ksc
Shut off head m
Pump speed rpm
Power input KW
No. of stages 6
Type of first stage impeller double entry
Depth m
COMMISSIONING DEPARTMENT, NTPC-SIPAT

48. COMMISSIONING DEPARTMENT, NTPC-SIPAT
MDBFP
Pump flow TPH
Suction temp C
BP Suction pr ata
BFP Suction pr ata
BFP Discharge pr ata
BFP Discharge temp C
BP Discharge pr ata
Shut off head m
BFP Speed rpm
BP Speed rpm
Normal R/C flow 220 TPH
HC Rated O/P Speed 6505 rpm
Outer casing type barrel
No. of stages 7
BFP warm up flow 15 TPH
COMMISSIONING DEPARTMENT, NTPC-SIPAT

49. COMMISSIONING DEPARTMENT, NTPC-SIPAT
TDBFP
Pump flow TPH
Suction temp C
BP Suction pr ata
BFP Suction pr ata
BFP Discharge pr ata
BFP Discharge temp C
BP Discharge pr ata
Shut off head m
BFP Speed rpm
BP Speed rpm
Normal R/C flow 365 TPH
HC Rated O/P Speed 6505 rpm
Outer casing type barrel
No. of stages 7
BFP warm up flow 20 TPH
COMMISSIONING DEPARTMENT, NTPC-SIPAT

50. COMMISSIONING DEPARTMENT, NTPC-SIPAT
Drip Pump
Design flow rate TPH
Discharge pressure ata
Shut off head m
Pump speed rpm
Power input KW
No. of stages 5
Type of first stage impeller centrifugal, single entry
Depth mm
COMMISSIONING DEPARTMENT, NTPC-SIPAT

51. COMMISSIONING DEPARTMENT, NTPC-SIPAT
RATED CONDITIONS
LOAD : 660MW
BEFORE HP STOP VALVE
STEAM PRESSURE : 247KSC
STEAM TEMPERATURE : 5370C
STEAM FLOW : T/HR
AFTER HPC
STEAM PRESSURE : 48KSC
STEAM PRESSURE : C
BEFORE IP STOP VALVE
STEAM PRESSURE : 43.2KSC
STEAM TEMPERATURE : 5650C
STEAM FLOW TO REHEATER : T/HR.
DESIGN CONDENSER PRESSURE : 0.105KSC (abs.)
COOLING WATER FLOW : 64000M3/HR
FINAL FEED WATER TEMP. : C
FREQUENCY RANGE : 47.5 – 51.5 Hz
COMMISSIONING DEPARTMENT, NTPC-SIPAT

52. STEAM TURBINE Generator rated speed 3000 rpm
Generator manufacturer Electrosila
No. of bleedings 8
Length of the turbine m
No. of stages
HPT 17
IPT 11x2
LPT-1 5x2
LPT-2 5x2
Total 59
Turbine Governing system
Mode of Governing Nozzle
Type E/H
Control fluid Firequel-L make
Supresta-USA
Normal Operating Pr. 50 Ksc
Capacity lpm
Fluid pump motor rating 200 KW
Filter material Ultipor
Mesh size 25 µ

53. Turbine Protections
Turbine protection system consists of Two Independent channels, each operating the corresponding solenoid (220V DC) to trip the Turbine in case of actuation of remote protection
Hydraulic Protection: Apart from the Electrical Trip, Turbine is equipped with the following Hydraulic Protections:
1. Local Manual Trip (1V2)
2. Over speed Trip #1 at 110% of rated speed
3. Over speed Trip #2 at 111% of rated speed
4. Governing oil pressure < 20 Ksc
Contd..

54. COMMISSIONING DEPARTMENT, NTPC-SIPAT
5.Axial shift Very High (2V3) [-1.7mm, +1.2mm]
6.Turbine bearing vibration : Very High (2V10 including X & Y directions)* >11.2mm/sec (Td=2 sec)
7.Lube oil tank level very Low (2V3)* Td=3sec (Arming with two stop valves open)
8.Lub oil pressure Very Low (2V3) < 0.3 Ksc; Td =3 sec (Arming with two stop valves open)
9.Condenser pressure Very High (2V3) > - 0.7ksc
(Arming with condenser press < 0.15 ksc Abs)
Contd
COMMISSIONING DEPARTMENT, NTPC-SIPAT

55. COMMISSIONING DEPARTMENT, NTPC-SIPAT
10.M.S. temp Very Low (2V3) < 470 deg C (arming > 512 deg C)*
11.M.S. temp Very High (2V3) > 565 deg C*
12.HRH temp Very Low (2V3) < 500deg C (arming > 535 deg C)*
13.HRH temp Very High (2V3) > 593deg C*
14.HPT outlet temperature Very High (2V4) > 420 deg C
Contd…
COMMISSIONING DEPARTMENT, NTPC-SIPAT

56. COMMISSIONING DEPARTMENT, NTPC-SIPAT
15.Gen seal oil level of any seal oil tank Very Low (2V3)* < 0 mm;Td=15 sec (Arming with any two stop valves open)
16.All Generator seal oil pumps OFF (3V3)* Td: 9 sec (Arming with any two stop valves open)
17.Generator Stator winding flow Very Low (2v3) < 17.3 m3/hr; Td =120 sec (Arming with any two stop valves open)
18.Generator hot gas coolers flow Very LOW (2V3)* : <180m3/hr; Td=300sec(Arming with any two stop valves open)
19.Generator cooler hot gas temp. Very High(2V4) > 85 deg (Td = 300sec
Contd
COMMISSIONING DEPARTMENT, NTPC-SIPAT

57. COMMISSIONING DEPARTMENT, NTPC-SIPAT
20.MFT operated: (2V3)
21.Deareator level Very High (2V3) > 3400 mm*
22.HP heater level protection operated (2V3)*
23.Generator Electrical protection operated (2V3)
25.Turbine over speed protection operated (114%)
26.Turbine Controller failure protection operated (2V3)
COMMISSIONING DEPARTMENT, NTPC-SIPAT

58. COMMISSIONING DEPARTMENT, NTPC-SIPAT
OF SIPAT SUPER CRITICAL UNIT
1ST UNIT SYNCHRONIZED AT :
1ST UNIT FULL LOAD ACHIEVED AT :
2nd UNIT SYNCHRONIZED AT :
2ND UNIT FULL LOAD ACHIEVED AT :
COMMISSIONING DEPARTMENT, NTPC-SIPAT

59. COMMISSIONING DEPARTMENT, NTPC-SIPAT
PRE – COMMISSIONING ACTIVITIES
CHEMICAL CLEANING OF BOILER :
REQUIRED FOR
Maintaining steam quality at the turbine inlet.
Minimizing corrosion of the metal surface of boiler.
DETERGENT FLUSHING OF PRE-BOILER SYSTEM
To remove dirt ,oil ,grease etc., from Condensate ,Feed water, Drip and Extraction steam lines of HP and LP heaters prior to putting these systems in regular service. This is to ensure flow of clean condensate and feed water to the boiler.
STEAM BLOWING OF POWER CYCLE PIPING :
The purpose of steam line blowing is to remove pipe slag, weld bead deposits and other foreign material from the main and reheat steam systems prior to turbine operation. The cleaning is accomplished by subjecting the piping systems to heating, blowing steam and cooling cycles in sufficient number and duration until clean steam is obtained.
SAFETY VALVE FLOATING
COMMISSIONING DEPARTMENT, NTPC-SIPAT

60. COMMISSIONING DEPARTMENT, NTPC-SIPAT
PRE – COMMISSIONING CHECKS
All commissioning procedure should be finalized.
P&I Drawings should be finalized and available with site engineer
Different systems check list should be finalized with all concerned agencies
All Field quality checks should be completed.
P&I Checks should be finalized.
Start – Up procedure should be finalized
COMMISSIONING DEPARTMENT, NTPC-SIPAT

61. COMMISSIONING DEPARTMENT, NTPC-SIPAT
COMMISSIONING SEQUENCE OF TG SIDE
1.Commissioning of stator water cooling system for HV testing
before generator rotor insertion.
Stator water pump trial run.
Flushing of the system bypassing winding.
Flushing of the system through the winding.
2.Commissioning of MCW,ACW and DMCW system.
Trial run of pumps.
Flushing of the system.
3.Detergent Flushing of pre boiler system (Feed water ,condensate
,HPH and LPH drip system)
Cold water flushing until turbidity comes below 5NTU.
Hot water flushing (600C) with 2 hrs circulation of each circuit.
Raising water temperature to 600C and addition of Detergent
(Coronil 100%)
COMMISSIONING DEPARTMENT, NTPC-SIPAT

62. COMMISSIONING DEPARTMENT, NTPC-SIPAT
e) Circulation through each circuit for 2 hrs.
f) Hot draining of the system
g) DM water rinsing of each circuit until conductivity comes below
5µs/cm and oil content BDL.
h) Passivation with ammonia and hydrogen peroxide solution at a
temperature of 400C.
Draining of the system.
4. Lube oil flushing of MDBFP lube oil system.
5.Trial run of MDBFP.
6.Lube oil and seal oil flushing of main TG.
7.CF system flushing.
8.Condenser flood test.
9.Trial run of CEPs
10.Commissioning of generator gas system.
11.Generator ATT.
12.Calibration of HPCVs and IPCVs
13.Putting turbine on barring.
14.Vacuum pumps trial run.
COMMISSIONING DEPARTMENT, NTPC-SIPAT

63. COMMISSIONING DEPARTMENT, NTPC-SIPAT
15.Commissioning of seal steam system.
16.Commissioning of HP and LPBP system.
17. Vacuum pulling.
18.Lube oil flushing of TDBFP.
19.Steam blowing of TDBFP steam line.
20.Commissioning of TDBFP.
COMMISSIONING DEPARTMENT, NTPC-SIPAT

64. UNIT SYNCHRONIZTION POWER CYCLE PIPING STEAM BLOWING MS Line HT
CRH Line HT
HRH Line HT
STATOR COOLING WATER
FUR DRAFT SYSTEM
MS Line Welding Completion ( 30 Pen)
CRH Line Welding Completion ( 12 Pen)
HRH Line Welding Completion (34 Pen)
SEC AIR SYSTEM
TG ON BARRING
MS Line Hanger Erection Cold Setting
CRH Line hangers Cold Setting
HRH Line Hangers Cold Setting
BRP TRIAL RUN
MS Line Insulation
CRH Line Insulation
HRH Line Insulation
TG LUBE OIL / GEN SEAL OIL SYSTEM
POWER CYCLE PIPING STEAM BLOWING
FURNACE READINESS
FUEL OIL SYSTEM READINESS
CHEMICAL CLEANING OF BOILER
AUX PRDS READINESS
UNIT SYNCHRONIZTION
CONDENSER VACCUM SYSTEM
MDBFP Trial
COMPRESSED AIR SYSTEM READINESS
CEP Trial
CW SYSTEM READINESS
GATES, DAMPERS / VALVES
TG :
SG : (13 / 190 )
TG SEAL STEAM SYSTEM
MFT CHECKING
TG CONTROL FLUID SYS
TG GOV SYSTEM
DDCMIS
FSSS READINESS
GEN GAS SYSTEM

65. Discussion
Questions Please
Enlighten Us
THANK YOU

66. Evaporator – heat absorption

67. Reduced number of evaporator wall tubes.
 Ensures minimum water wall flow.

68. SPIRAL WALL ARRAMGEMENT AT BURNER BLOCK AREA :

69. Support System for Evaporator Wall
Spiral wall  Horizontal and vertical buck stay with tension strip
Vertical wall  Horizontal buck stay