2. Introduction
Talwandi Sabo Power Limited (TSPL) is implementing a state of the art coal
based supercritical thermal power plant in District Mansa, Punjab, India. This will
be the first Supercritical unit and one of the largest Greenfield power project in
the State of Punjab. Power generated from this project shall be supplied to the
Punjab State Electricity Board
The State of Punjab has been consistently facing peak power shortages during
summer, in the last 3 years. The total current installed capacity of Punjab is
around 6,973 MW, against peak demand of around 10,435 MW (CEA Monthly
report Nov 2010). The demand is expected to increase to 11,000MW by
2012(17th Electric Power Survey). The successful implementation of the project
shall bridge the power demand and supply gap.
3. History (sepco1)
For the power generation with 3 x 660 MW of T.S.P.L authorities are require to be
operative to active full operation. The auxiliaries are basically operation either on L.T
system i.e. 22 KV power supply is made available to the system after providing
station transformer of 3 x 660 MVA capacity with voltage 22 KV .
Further the 22 KV system which is normally in delta configuration and terms as an
unearthed system so also to keep the running motor complete in operating
condition in case of any one phase of motor winding is earthed due to any reason.
Earthling is detected by a protection system with alarm facility to take remedial
measures immediately and at the same time to maintain the generation level in the
same condition, prior to occurring the earth fault the single phase earth fault is
detected in due course till the motor is not earthed to other or another phase.
Soot Blowers are therein the boiler area on the furnace side or Zone which helps in
the blowing the shoot / ash deposition regularly of the furnace wall / economizer
tubes to keep heat transfer at the required parameter.
In 2011 , SEPCO1 prepared a single unit project Report for power station
comprising of the three units of each of capacity 660 MW for TSPL subsequently
in2015, this is revised by the Sing kong Electrical power corporation No.1 Company
4. Land marks
Land measuring approx. 1100 acer was required for the project in 1980, for
disposal of ash tank very near to power station is acquired which the ash in
slurry form is disposed off through ash and slurry disposal plants.
The Talwandi Sabo Power Limited is taking water for plant from he jagga canal .
The large expanse of water reached by the barrage provides the efficient direct
circulation of cooling system for the power station.
Coal India limited owns and operates the entire major coal field in India through
its coal producing subsidiary companies viz. Eastern Coal Fields Limited,
Western Coal Fields Limited.
Coal India limited is supply coal from its coal mines of coal producing
subsidiaries BCCL, SEAL & ECL to Talwandi Sabo Power Limited through
railway wagons.
The source of water for power station is reservoir formed in plant east side . In
case of large capacity plants huge quantities of coal and water is required. The
transportation of electricity is more economical then transportation of coal.
5. Design features
Estimation of coal.
Selection of site.
Capacity of power station.
Selection of boiler & turbine.
Selection of condensing unit.
Selection of Electrical generator.
Election of cooling system.
Design of Control & instrumentation required.
The design of steam power station requires wide experience as the
subsequent operation and maintenance are greatly affected by its design.
The most efficient design consists of properly sized component designed to
operate safely and conveniently along with its auxiliaries and installation
6. coal
It can be called the heart of thermal power plant because it provided the
fuel for combustion in boiler
The main coal sources for TSPL are SECL (South Eastern Coalfields
Limited), ECL (Eastern Coalfield Limited) and BCCL (Bharat Coking Coal
Limited).
The approximate per day consumption at TSPS is about 1400 metric tones.
It costs approximate 3 crores of rupees per day including transportation
expenses.
The coal handling plant can broadly be divided into three
1) Wagon Unloading System.
2) Crushing System.
3) Conveying System
7. Coal mill
The ground level of area is asking
as the coal mill. In which coal is
received by the conveyer and
crushed the coal in grain size wise
had not crushing by the 13
conveyer chain room.
After crushing the coal and feed
into the boiler by mixing with hot
air came by PA FAN.
8. Boiler
Boilers are tangentially fired, balance draft, natural circulation , radiant type,
dry bottom with direct fired pulverized coal from bowl mills. They are
designed for burning low grade coal with high ash content. Oil burners are
located between coal burners for flame stabilization. Pulverized coal is
directly fed from the coal mills to the burners at the four corners of the
furnace through coal pipes. The pulverized fuel pipes from the mills to the
bunkers are provided with basalt lined bends to reduce erosion and to
improve the life of these pipes owing to poor grade of coal there is a high
percentage of mill rejects. The mill rejects are conveyed in a sluice way to
an under-ground tank. From this tank the mixture is taken to an overhead
hydro-bin where water is decanted and the mill reject are disposed off by
trucking. ESP with collection efficiency of 99.8% have been provided to
reduce environmental pollution and to minimize induce draft fan wear. A
multi-flue reinforced concrete stack with two internal flues has been
provided.
9. Furnace Size 20.4023 x 20.072 m
Height 68 m
Lower header elevation 7 m
Roof elevation 75 m
Transition header elevation 50.47 m
Furnace plan heat release 3.419 x 10^6 Kcal/m2
Furnace volume heat release 58.05 x 10^3 Kcal/m3
Water Wall area/ No of tubes 4667/ 1468 m2
Super heater area 12034 m2
Re heater area 24395 m2
Economizer area 12542 m2
10. Turbo generator
‘TURBO GENRATOR’ is
manufactured by Dongfang
Electric Machinery and is
constructed with the china
techniques, which ensures
reliability with constructional &
operational economy
11. Steam turbine
Description of 660 MW
Steam Turbines:
LP Turbine(2)
HP Turbine (1)
IP Turbine(1)
Steam flow
12. Description of 660 MW Steam Turbines
HP Turbine:
HP turbine consists of 8 Stages, 2 Stop valves, 4 control valves
The HP casing is a barrel type casing without axial joint ,Because of its rotation
symmetry the barrel type casing remain constant in shape and leak proof
during quick change in temperature
Ip turbine:
The IP turbine consists of 6 Stages, 2 Stop valves, 2 control valves.
The steam from HP turbine after reheating enters the inner casing from above
and below through two inlet nozzles
Lp turbine:
The IP turbine consists of 6 Stages, 2 Stop valves, 2 control valves.
The steam from HP turbine after reheating enters the inner casing from above
and below through two inlet nozzles.
13. Water treatment
Impurities in water are:
Undesolved & suspended solid particles.
Dissolve slats & minerals.
Dissolved gasses (O2 & CO2).
Other minerals.
Turbidity & sedimentation.
Silica.
Sodium & potassium salts
14. Dm plant
In this plant process water is fed from all these dissolved salts.. This
plant consist of two streams each stream with activated carbon filter,
weak acid, cation exchange & mixed bed exchanger. The filter water to
the DM plant through 250 dia. header from where a heater top off has
been taken to softening plant. Two filtered water booster pumps are
provided on filtered water line for meeting the pressure requirement in
the DM plant.
Sodium sulphate solution of required strength is dosed into the
different filtered water by means of the dosing pump to neutralize the
chlorine prior of the activated carbon filter. When water passed over
then the carbon will remove residual chlorine from water
15. SALIENT FEATURE OF
T.S.P.L.
1. LOCATION banawala, mansa.
2. CAPACITY 3x660mw.
3. Source of water. Jagga canal.
4. Boiler
A) type : Tangentially fired natural circulation, balance draft , direct
fired radiant reheat, water tube boiler.
B)no. Of units. 3
C) max. Efficiency. Bhp (85) %
D) capacity. 1400 metricTonnes/ day
E) steam pressure 139 kg./Cm2
F) steam temp. 540oc,
G) no. Of draft fans i) FD fans 2 unit ( each boiler)
ii) ID fan 2 unit ( each boiler ).
16. H) no. Of air fans in service.
I) primary 2 unit.
Ii)seal air fan. 1 unit.
Iii) scanner. 1 unit.
I) no. Of coal mills in service. 6 unit.
J) no. Of soot blower in Service.: 48
K) no. Of oil burners. 24
5. Fuels :
A) coal.
I.) Type. Stack coal.
Ii) calorific value. 4450 k.Cal./Kg.
Iii) qty. Used. 500 ton /hour
Iv)ash contents. 40%
17. V) sulphur contents. 0.5%.
of handling. Belt conveyor.
Vii) type of disposal of ash.
A) fly ash. Wet
b) bottom ash. Wet .
B) OIL
I) type. HSD & furnace oil.
Ii) qty. Used. As per requirement & draft
conditions.
