Chandrapura thermal power station

industrial training ppt

1. DAMODAR VALLEY CORPORATION INDUSTRIAL TRAINING AT CHANDRAPURA THERMAL POWER STATION Medicaps Institute of Technology & Management Mechanical Engineering Mechanical Engineering PRESENTED BY : - SUBMITTED TO : - Mechanical Engineering Mechanical Engineering

2. DAMOADAR VALLEY CORPORATION The  Damodar Valley Corporation (DVC) is a government organization which operates several power stations in the  Damodar River area of West Bengal and Jharkhand states of India ESTAIBLISHED IN 7TH JULY 1948 AS THE FIRST MULTIPORPOSE RIVER VALLEY PROJECT OF INDEPENDENT INDIA TO ARREST THE FURY BY THE RIVER OF SORROW AND TO HARNESS THE RESOURCES OF DAMODAR VALLEY COMMAND AREA IN JHARKHAND AND BENGAL. A POWER GENERATING CAPACITY OF OVER 2710MW. 2

3. MISSION AND VISION FLOOD CONTROL AND IRRIGATION GENERATION,TRANSMISSION AND DISTRIBUTION OF POWER. INDUSTRIAL AND DOMESTIC USE ECO-CONSERVATION ENRICHING THE QUALITY OF LIVES OF PEOPLE 3

4. DVC POWER STATION AT GLANCE: 1)THERMAL NAME LOCATION CAPACITY BOKARO-B Dist- Bokaro State-Jharkhand 630 MW (3*210 MW) CHANDRAPURA Dist- Bokaro State-Jharkhand 890 MW (3*130 +2*250 MW) DURGAPUR Dist- Burdhaman State-West Bengal 350 MW (1*140 MW + 1* 210 MW) MEJIA Dist- Bankura State-West Bengal 2340 MW (4*210 MW + 2*250 + 2*500) 4

5. 2) HYDEL NAME LOCATION CAPACITY TILAIYA River- Barakar Dist- Hazaribagh State-Jharkhand 4 MW (2*2 MW) MAITHON River- Barakar Dist- Burdhaman State-West bengal 60 MW (3*20 MW) PANCHET River- Damodar Dist- Dhanbad State-Jharkhand 80 MW (2*40 MW) TOTAL HYDEL 144 MW TOTAL THERMAL 2710 MW GRAND TOTAL 2854 MW 5

6. CHANDRAPURA THERMAL POWER STATION A UNIT OF DVC, LOCATED AT BOKARO DISTRICT IN JHARKHAND. LARGEST PULVERISED FUEL FIRE POWER STATION OF ASIA WITH UNIT 1 AS THE FIRST REHEAT UNIT INSTALLED IN INDIA WITH HIGHEST STEAM PARAMETERS. SWITHCHYARD OF CTPS IS THE INDIA’S BIGGEST NETWORK. 6

7. Thermal Power Plant Overview

8. Main and Auxiliary Equipments Coal handling plant Pulverizing plant Boiler Ash handling plant Turbine Condenser Cooling towers and ponds Feed water heater Economiser Superheater and Reheater Air preheater 8

9. COAL HANDLING STEPS IN COAL HANDLING: Coal delivery Unloading Preparation Transfer Storage Implant handling Crushing & pulverizing Weighing & measuring Feeding the coal into furnace 9

10. Power Generation Here, the burning of coal starts. Water is taken from DAMODAR river and demineralised and then send to boiler. Super heated steam of 540 degree celsius is formed which hits turbine with pressure of 137 kg/cm square. It rotates turbine to which rotor of generator is coupled when speed comes to 3000 rpm then building of voltage starts due to faraday’s law of electromagnetic induction When voltage becomes 15.75kv then this is fed to transformer to step it up to 220kv,which is bus bar voltage. Generator is synchronized with bus bar and steam is condensed to water, reused again to generate power.

11. WATER TREATMENT This is additional water added in feed water stream . but before that it Is treated in water treatment plant At CTPS, there are 4 treatment units 1) Dirty water from reservoir. 2) Alum is mixed in with water coming from 1. 3) Clean water coming from 2 into 3. This treated water is sent into feed stream , where it mixes with condensed water, to form “final water”.

12. Boilers Pulverized coal is put in boiler furnace. Boiler is an enclosed vessel in which water is heated and circulated until the water is turned in to steam at the required pressure. DAMAGES DUE TO STEAM

13. Steam Turbine Extracts thermal energy from pressurized steam and uses it to do mechanical work on a rotating output shaft. uses multiple stages in the expansion of the steam.

14. Turbine specifications Order No - 10445 Year of Manufacture -2003 Steam Press. – 76.5 Bar Steam Temp. – 560 ºC Speed – 50 rps Rated Capacity – 251.35 MW Exhaust Steam Pressure – 2.8 Bar Type- M30-40

15. Generator Converts mechanical energy into electrical energy. Turbine is coupled with the Turbo-generator that normally spins at 3000 rpm in countries with 50 Hz supply frequency The generated voltage is stepped up in Generator Transformer and the power is evacuated through transmission line feeders. SWITCHYARD GENERATOR TRANSFORMERS Maker: BHEL Rating: 315MVA Voltage ratio: 16.5KV/240KV Cooling: oil forced, air forced

16. CONDENSER Steam after rotating steam turbine comes to condenser. Condenser refers here to the shell and tube heat exchanger (or surface condenser) installed at the outlet of every steam turbine in Thermal power stations of utility companies generally. These condensers are heat exchangers which convert steam from its gaseous to its liquid state, also known as phase transition. 16

17. Types of water required DEMINERALISED WATER : BOILER SOFTEN WATER : COOLING AND GENERAL SERVICE DRINKING WATER : DOMESTIC PURPOSE UNTREATED WATER : ASH HANDLING,COAL HANDLING AND FIRE FIGHTING Water Supply Majority of water supply for steam generation is condensed water. The steam from L.P. turbine is sent into surface condenser which changes the phase from steam to water. Now, this water is sent to cooling towers which are evaporative coolers used for cooling water. these evaporate some part of condensed water to reject heat. At CTPS cooling towers are of hyperboloid structure .

18. AUXILLIARY COOLING WATER SYSTEM Auxiliary cooling water system involves following main components. ACW PUMP. ECW PUMP. PHE. OTTOKLIN FILTER. 1 3 2 PHE ACW PUMP DISCHARGE ACW WATER O/L FROM PHE ECW PUMP DISCHARGE ECW FROM PHE

19. ASH HANDLING PLANT The main operations are: Removal of ash from furnace. Transfer of ash to a fill or storage. Disposal. Ash can be disposed of as: Dry ash system Ash slurry system

20. Fly ash and bottom ash in form of ash slurry is pumped to the ash ponds through a set of pipe lines. Ash ponds for old plants are constructed to enable ash particles to settle down & decanted water overflows into the river.

21. EXHAUST The dust and ash are taken into ash treatment plant as mentioned earlier. The rest flue gas moves through flue gas stack which is a type of chimney, a vertical pipe or channel for the exhaust gas outlet.

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