Steam Cycle of Super-critical Power Plant
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Transcript of Steam Cycle of Super-critical Power Plant
![Page 1: Steam Cycle of Super-critical Power Plant](https://reader033.fdocuments.us/reader033/viewer/2022061123/5475c62cb4af9fc41a8b462b/html5/thumbnails/1.jpg)
STEAM CYCLE OF SUPER-CRITICAL POWER PLANT
By: Amit Kumar Singh
Ankush Gupta
Gaurav Gupta
Himanshu Saini
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CONTENTS
ABOUT US RANKINE CYCLE STEAM CYCLE VARIABLE PRESSURE CONTROL
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ABOUT US
The JV emerged in 1995 at Baroda, on equal equity basis.
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RANKINE CYCLE OF SUB-CRITICAL POWER PLANT
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RANKINE CYCLE OF SUPER-CRITICAL POWER PLANT
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MAIN STEAM
From BFP Discharge
Boiler Recirculation Pump
Boiler Feed Pump Discharge Header Economizer I/L
Header
Economizer Coils
LTSH I/L HeaderBackpass Lower
Front Header
Intermediate Header
Economizer O/L Header
First Pass Lower Header
Divisional SH I/L Divisional
SH O/L
FSH I/LFSH O/L
Roof I/L Header
Waterwall O/L Header
Seperator (Nos:4)
Separator Storage Tank(Nos:1)
DSH #1
DSH #2
Spiral Tubes (232 ×2) =464
Vertical tubes(464 × 3)=(348 × 4) =1392
LTSH O/L HeaderRoof O/L Header
Boiler Flow Diagram
Backpass Roof
Backpass Left & Right SideWall
Extended water wall
First and Middle Pass Roof
Reheater
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ADVANTAGES OF SUPERCRITICAL OVER SUBCRITICAL
Higher Plant Thermal efficiency Increased plant availability & reliability Greater environmental compatibility Sliding pressure operation Lower coal/Power consumption Lower cost of generation
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Water wall Furnace Configuration
(With smooth tube)
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SC WATER WALL TUBING
Water wall Furnace Configuration
Spiral wound tube wall Vertical tube wall
Leads to :•Less no. of smooth tubes• Complicated support of tubes•Costly - erection and manufacture
•Up to 40% pressure control range
Leads to :•Rifled tubing• Individual tube orifices•Simple tube supporting
•Up to 20% control range
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INTERNALLY RIBBED TUBE
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VERTICAL VARIABLE PRESSURE FURNACE
With variable pressure control less power is required.
Riffled tubes are used to achieve variable pressure in the furnace.
The tube wall can keep wet to a steam quality to 90% even with low mass flow rates.