A PRACTICAL TRAINING SEMINAR ON

PRESENTED BY:SAGAR KR. SHARMAVII SEM. (MECHANICAL ENGG.)07ME62

SURATGARH SUPER THERMAL POWER STATION

INTRODUCTION

1. S.S.T.P.S is situated near village Ranyawali , Tahshil Suratgarh District Shri Ganganagar (RAJ).

2. At present there are 6 units of 250MW .3. These 6 units were installed in four stages- 1st stage -1st and 2nd unit 2nd stage -3rd and 4th unit 3rd stage -5th unit 4th stage - 6th unitTherefore, total generation capacity

=1500MW

LAND :Total Land 5020 BIGHAPlant Area 3810 BIGHAColony Area 431 BIGHARailway Site 425 BIGHAWater conducting 354 BIGHAsystem

WATER CONDUCTING SYSTEM:a) Length of Intake Canal=

1.6 Kmb) Capacity of each Decilting Pump=

3.14 Kw*3(30M³/Hr.)c) Intake Pump House=

90 Kw*6(1250M³/Hr.)Each Pump d) Raw Water Pump House=

7 lacks M³

WORKING OF POWER PLANT

BOILER

BOILER PARAMETERS:-•Height of boiler 60 meters•Height of chimeny 220 meters•Foundation depth 8.5 meters•Furnace Depth 11506 meters•Furnace Width 15.240 meters•Total Water Flow 780.5 T/Hr.•Steam Flow 740.8 T/Hr.•Steam Temperature 540ºC•Coal Requirement for 250MW 160 T/Hr.•Primary Air for pulverized fuel 268.4 T/Hr.•Secondary Air for ignition (Combination) 647.0 T/Hr.•Total Air 915.5 T/Hr.•Steam Pressure 156 Kg /cm²

TURBINE

A Steam turbines (prime mover) converts heat energy of steam into mechanical energy and drives the generator. When steam is allowed to expand through a narrow orifice, it assumes kinetic energy at the expenses of its enthalpy (heat energy).This kinetic energy of steam is changed to mechanical energy through the impact (impulse) or reaction of steam against the blades.

TURBINE

HP TURBINE

IP TURBINE

LP TURBINE

HP turbine having 25 Blades & Single flow.IP turbine having 17 Blades & Single flow.LP turbine having 8 Blades& Double flow.

TURBINE SPECIFICATION

Inlet/Outlet Pressure And Temperature1. H P Turbine Steam Inlet/outlet pressure -150 Kg/Cm²/39.69 Kg/Cm²

A inlet/outlet Temperature - 537*C/346*C2 . I P Turbine Steam Inlet pressure - 35.64 Kg/Cm² a. Outlet pressure - 6.83 Kg/Cm² b.Exhaust Temp. - 305*C 3. LP Turbine Steam Inlet pressure - 6.83 Kg/Cm² a.Exhaust Temp. - 49*C

CONDENSERThe condenser does the job of condensing the steam exhausted from turbine. Thus, it helps in maintaining low pressure at the exhaust there by permitting expansion of steam in the turbine to a very low pressure. This improves the plant efficiency. The exhaust steam is condensed and used as feed water in the boiler. Maintenance of high vacuum in the condenser is essential for efficient operation. Any leakage of air into the condenser destroys the vacuum and cause 1) increases in condenser pressure which limit the useful heat drop in the prime movers. 2) A lowering of the partial pressure of the steam and of the saturation temperature along with it. This means that the latent heat increases and therefore, more cooling water is required. As it is not possible to eliminate air leakage completely, a vacuum pump is necessary to remove the air leaking into the condenser.

In S.S.T.P.S. surface condenser is used. A surface condenser consists of an airtight cylindrical shell having a chamber at each end. Water tube extends between the chambers. The shell is made of welded steel plate construction and the tubes are made of copper zinc alloy. Cooling water flow through the tubes. The steam is admitted from the top and gets condensed due to contact with the tube surface. The condensate leaves from the bottom. For efficient operation, the temperature rise in the cooling water passing through the condenser should be around 10degree C.

Condenser Used In S.S.T.P.S.

1. COAL HANDLING PLANT (CHP)

COAL &ASH HANDLIG PLANT

The function of CHP is automatic feeding of coal to the boiler furnace. The coal is transported to the power station by rail. One rail (rack) consists of 58 or 59 boxes with 60 – 70 tones coal loaded in each box. There are 6-7 racks of coal are used.

The main equipments of CHP are:

1. Wagon trippler: - A tripler is a equipment that is used for unloading the coal from box by lifting and tilting the box.

2. Side arm charger: - It is used for pushing or carrying the loaded or empty boxes.

3. Conveyors: - Different sized and diff. Capacity conveyors are installed for feeding the coal from Tripler to bunkers.

4. Crusher: - Crushers are provided for crushing the coal in desired sizes.5. Primary crusher : 26. Secondary crusher : 87. Stacker cum re-claimer : 28. Stacker/Reclaimer: - The stored coal is stacked or reclaimed by the

stacker/reclaimer.9. Bunkers: - Crushed coal is led to the mills via canonical shaped bunkers.10.Coal feeders: - Coal feeder delivers the coal from the bunkers to the mill.11. Pulverization of coal:- Pulverizing mills In modern TPS’s coal is

pulverized i.e. ground to dust likesize. Pulverization is a means of exposing a large surface area to the action oxygen and consequently helping the combustion. mill used for one unit in which one standby. Mill is 4.7met in dia. &7.2 met in length.

Useful Heat Value Of Different Grade Of Coal.

GRADE U.H.V

A >6200 Kcal/kg

B 5600-6200 kcal/kg

C 4940-5600 kcal/kg

D 4200-4940 kcal/kg

E 3360-4200 kcal/kg

F 2400-3360 kcal/kg U.H.V = 8900-138[A+M] Where A=% of ash M =% Inherent moisture

2. ASH HANDLING PLANT (AHP)

Coal contains a considerable amount of ash. The percentage of ash in the coal varies from about 5% in good quality coals to about 40% in poor quality coals. Generally poor quality coal is used in steam power plant, so the plant produces hundred tones of ash daily. For removal of ash from the boilers and its disposal to the suitable site is quite difficult. Ash handling comprises the following operation: 1. Removal of ash from the furnace ash hoppers.2. Transfer of ash to a fill or storage3. Disposal of stored ash.

In S.S.T.P.S. Hydraulic System Is Used For Ash Handling.

Hydraulic system:

In this system stream of water carries ash along with it in a Closed channel and disposes it of to the proper site. This is the healthy clean dustless and completely enclosed system.

In this system the hoppers below the boilers are fitted with water nozzles both at the top and on sides. The top nozzles quench the ash while the side ones provides the driving force for the ash. The ash and water then flow along a trough to a receiving hopper or sump where the ash is separated from the water. The water is used again while the ash is sent out through the carriages.