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

COMMISSIONING DEPARTMENT, NTPC-SIPAT

COMMISSIONING DEPARTMENT, NTPC-SIPAT

COMMISSIONING DEPARTMENT, NTPC-SIPAT

COMMISSIONING DEPARTMENT, NTPC-SIPAT

COMMISSIONING DEPARTMENT, NTPC-SIPAT

INTRODUCTION TO SUPER CRITICAL UNI -

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

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

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

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

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.

COST COMPARISON 1.09 Cr 1.02 Cr 0.6Cr 0.63 Cr 1 Cost of SG Package 1020.54 Cr with ESP 2 Cost of ESP 183.54Cr 3 Total cost of Boiler + ESP 2154.27 Cr 1020.54 Cr 4 Cost of Boiler per MW with ESP 1.09 Cr 1.02 Cr 5 Cost of TG for entire stage 1204.72 Cr 634.31 Cr 6 TG cost per MW 0.6Cr 0.63 Cr

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

= 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 = 2207 KCal / KWHR ( at 100% TMCR) 80% TMCR = 2222 Kcal / KWHR 60% TMCR = 2276 Kcal / KWHR 50% TMCR = 2376 Kcal / KWHR Plant Efficiency at 100% TMCR = 38.96% 80% TMCR = 38.7 % 60% TMCR = 37.78% 50% TMCR = 36.19%

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

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

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

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

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

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

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

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

COMMISSIONING DEPARTMENT, NTPC-SIPAT

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

BOILER DESIGN PARAMETERS

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

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

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.

BOILER CONTROL

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

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

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

COMMISSIONING DEPARTMENT, NTPC-SIPAT STEAM TURBINE K-660-247 LMZ (LENINGRADSKY METALLICHESKY ZAVOD) K STANDS FOR KLAPAN LTD.,BULGARIA WHICH SUPPLIES TURBINE,NOZZLES,DIAPHRAGMS, SEALS,BLADES ETC. COMMISSIONING DEPARTMENT, NTPC-SIPAT

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

COMMISSIONING DEPARTMENT, NTPC-SIPAT

COMMISSIONING DEPARTMENT, NTPC-SIPAT

IP Turbine

LP Turbine

COMMISSIONING DEPARTMENT, NTPC-SIPAT

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

COMMISSIONING DEPARTMENT, NTPC-SIPAT Condenser Design LMZ Design CW Flow 64000 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 22.225 (OD)x0.71 (t) - 29920 22.225 (OD)x1.00 (t) - 2080 Tube material ASTM A-249 TP 304 Rated TTD 3.40C DT of CW 100C COMMISSIONING DEPARTMENT, NTPC-SIPAT

Condensate Extraction Pump Design flow rate 238.75 Kg/s Discharge pressure 32.15 Ksc Shut off head 395 m Pump speed 1480 rpm Power input 972.3 KW No. of stages 6 Type of first stage impeller double entry Depth 7.43 m COMMISSIONING DEPARTMENT, NTPC-SIPAT

COMMISSIONING DEPARTMENT, NTPC-SIPAT MDBFP Pump flow 769.950 TPH Suction temp 186.2 0C BP Suction pr. 14.05 ata BFP Suction pr. 21.01 ata BFP Discharge pr. 335.78 ata BFP Discharge temp. 187.9 0C BP Discharge pr. 22.01 ata Shut off head 4830 m BFP Speed 6275 rpm BP Speed 1490 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

COMMISSIONING DEPARTMENT, NTPC-SIPAT TDBFP Pump flow 1283.14 TPH Suction temp 186.2 0C BP Suction pr. 14.10 ata BFP Suction pr. 28.24 ata BFP Discharge pr. 335.83 ata BFP Discharge temp. 187.8 0C BP Discharge pr. 29.06 ata Shut off head 4580 m BFP Speed 4678 rpm BP Speed 2098 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

COMMISSIONING DEPARTMENT, NTPC-SIPAT Drip Pump Design flow rate 324.509 TPH Discharge pressure 43 ata Shut off head 306.7 m Pump speed 1486 rpm Power input 310.1 KW No. of stages 5 Type of first stage impeller centrifugal, single entry Depth 1090 mm COMMISSIONING DEPARTMENT, NTPC-SIPAT

COMMISSIONING DEPARTMENT, NTPC-SIPAT RATED CONDITIONS LOAD : 660MW BEFORE HP STOP VALVE STEAM PRESSURE : 247KSC STEAM TEMPERATURE : 5370C STEAM FLOW : 2023.75T/HR AFTER HPC STEAM PRESSURE : 48KSC STEAM PRESSURE : 298.710C BEFORE IP STOP VALVE STEAM PRESSURE : 43.2KSC STEAM TEMPERATURE : 5650C STEAM FLOW TO REHEATER : 1681.12T/HR. DESIGN CONDENSER PRESSURE : 0.105KSC (abs.) COOLING WATER FLOW : 64000M3/HR FINAL FEED WATER TEMP. : 286.350C FREQUENCY RANGE : 47.5 – 51.5 Hz COMMISSIONING DEPARTMENT, NTPC-SIPAT

STEAM TURBINE Generator rated speed 3000 rpm Generator manufacturer Electrosila No. of bleedings 8 Length of the turbine 36.362 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 600 lpm Fluid pump motor rating 200 KW Filter material Ultipor Mesh size 25 µ

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..

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

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

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

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

COMMISSIONING DEPARTMENT, NTPC-SIPAT OF SIPAT SUPER CRITICAL UNIT 1ST UNIT SYNCHRONIZED AT : 18.02.2011 1ST UNIT FULL LOAD ACHIEVED AT : 2nd UNIT SYNCHRONIZED AT : 03.12.2012 2ND UNIT FULL LOAD ACHIEVED AT : 24.12.2012 COMMISSIONING DEPARTMENT, NTPC-SIPAT

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

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

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

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

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

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

Discussion Questions Please Enlighten Us THANK YOU

Evaporator – heat absorption

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

SPIRAL WALL ARRAMGEMENT AT BURNER BLOCK AREA :

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