Durgapur Steel Thermal Power Station (DSTPS), DVC, Andal

Vocational Training Project Report Presentation

1. Durgapur Steel Thermal Power Station DVC, Andal Abhishek Gorai Roll – 12/ ME /13 Mechanical Engineering National Institute of Technology Durgapur

2. About S ituated at Andal , Durgapur, W B ( c o-ordinates 23°34'48" N , 87°12'19" E ) Installed Capacity : 2x500 MW Running Capacity : 350 MW ( 1x140 + 1x210 MW )

3. Overview Chemical Energy (Fuel) Heat Energy (Steam) Mechanical Energy (Rotation of Turbine) Electrical Energy Fuel Water Air Combustion Steam Generation Treatment Conditioning Coal Oil Heat DM Plant Power Generation Turbine Generator Flue Gas Cooling System Wastewater

4. Water Packaging Source of Raw Water : Damodar River Water Requirement: To provide make-up water to the water/steam cycle . For cooling of the steam for re-use as condensate . For general domestic use . RESERVOIR AERATOR DM PLANT BOILER MAKE-UP CW MAKE-UP DMF POTABLE WATER GRAVITY FILTER CLARIFLOCCULATOR

5. Water Packaging : De-Mineralization Plant Activated Carbon Filter Strong Acidic Cation Exchanger Degasser Tower Strong Basic Anion Exchanger Mixed Bed Ultra Filtration SKID DM Water Storage Tank

6. Coal Handling Plant (CHP) Track Hopper Wagon Tippler Crusher House Stacker-cum- Reclaimer Conveyor Belts Raw Coal Bunker

7. Coal Mill ( Pulverizer ) Supplies pulverized coal as per steam generation requirement Facilitates combustion by pre-combustion drying up. Separates incombustibles. DSTPS has 10 Bowl Mills for each boiler Name : 803 XRP

8. Boiler S team is generated from DM water by heat addition to DM water at constant pressure & temperature . Boiler Description at DSTPS, Andal Top supported, fusion welded V ertical water-tube boiler Controlled Circulation 4-corner tilting tangential firing

9. Boiler Mountings Pressure Gauges For measuring pressures at various points Valves For safety, and to maintain unidirectional flow Water Level Indicator For optimum running of boiler LRSB (Long Retractable Soot Blower ) For cleaning soot from boiler’s inner surfaces Tapping and Manholes Maintenance Purpose

10. Boiler Accessories Air Preheater Air is pre-heated by flue gases to ensure complete combustion of even low-grade fuel, like Lignite. Economizer Feed-water is heated by the outgoing flue gases before entering boiler drum. Superheaters Steam is heated to higher temperature to ensure dryness fraction remains above 0.8 Reheaters Steam is reheated between HPT and IPT, and again between IPT and LPT

11. Turbines 3 turbines : HP, IP, and LP High Pressure Turbine (HPT) 17 stages Intermediate Pressure Turbine (IPT) 12 x 2 stages Low Pressure Turbine (LPT) 6x2 stages 3000 RPM H eat Rate : 1944.4 kcal/kWh

12. Generator and Exciter G enerates electrical power by the interaction of the rotating magnetic fields of the stator and rotor kW : 500000 Speed: 3000 RPM kVA: 588000 Frequency: 50 Hz P.F.: 0.85 Lag C oolant : H 2 and H 2 O Made at BHEL, Haridwar Brushless excitation system

13. Auxiliaries Regenerators HP Heaters (3 nos ) LP Heaters (3 nos ) Boiler Feed Pump Pressurizes feed water from De-aerator before entering into boiler Turbine Driven Boiler Feed Pump works with steam extracted from IP turbine exhaust. Motor Driven Boiler Feed Pump works with a motor. HP Heater

14. Condenser A shell and tube type surface heat exchanger. Cooling water flows twice through the tubes. Steam condenses by giving up heat and is collected at the hot well below. Maintained at 45 ˚C and little below atmospheric pressure.

15. Cooling Towers The heated cooling water after passing through the condenser, is brought to the cooling towers. Heat is given out in the atmostphere . The water is recirculated back as cooling water.

16. Ash Handling Plant Ash is categorised into : Bottom Ash collected at the bottom of the boiler Fly Ash collected at the Electro-Static Precipitator It is transported in the form of slurry Ash is either given away to cement factories, or is stored in Ash dykes.

17. Control and Automation Highly Automated by use of PLC controllers Control Rooms : Boiler Control Room CHP Control Room Switchyard Control Room

18. Conclusion The practical experience I have gathered during the overview training of this thermal power plant in two weeks will be very useful as a stepping stone in building bright professional career in future life. It gave me large spectrum to utilize the theoretical knowledge and to put it into practice. The trouble shooting activities in operation and decision making in case of crisis made me more confident to work in the industrial atmosphere.

19. Thank You