thermal power development - Infraline

Central electricity authority Annual Report 2009-10
6.14 Fly Ash Generation & Utilization
6.14.1 Fly Ash Utilisation
The total ash being generated by 81
thermal power stations pertaining to various
Power Utilities works out to about 117 Million
Tonnes per annum. It is estimated that for the
total thermal capacity of coal/lignite based TPSs
by end of 11 th Plan, the ash generated in the form
of fly ash (80-90%) and bottom ash (10-20%)
would be of the order of 173 Million Tonnes per
annum considering 38% ash content in coal as
an average and at 80% PLF. The beneficiation of
coal by reduction in the percentage ash content
and by blending with imported coal will reduce
the total quantity of ash generation.
Presently, the major areas of application
of fly ash include:
i) Cement manufacturing
ii) Roads and embankment construction
iii) Structural fill for reclaiming low lying
areas
iv) Brick/Block/Tiles manufacturing
v) Mine- filling
vi) Agriculture, Forestry and Wasteland
development
vii) Part replacement of cement in mortar,
concrete and ready mix concrete
viii) Hydraulic structure (Roller compacted
concrete)
ix) Ash Dyke Raising
x) Building components – Mortar, Concrete,
Concrete Hollow Blocks, Aerated Concrete
Blocks etc.
xi) Other medium and high value added products
(ceramic tiles, wood, paints) pavement
blocks, light weight aggregate, extraction of
alumina, Cenospheres, etc.
As mentioned above, by the end of 2012,
the ash likely to be generated from coal/lignite
thermal plants shall be of the order of 173 Million
Tonnes per annum. A number of measures are
being taken to encourage various sectors to
utilize fly ash. The targets of ash utilization are
primarily governed by the MoE&F Notification
dated 14 th September, 1999 and its amendment
Notification dated 27 th August, 2003 & 3 rd
November, 2009 as well as Hon’ble High Court
of Delhi directions vide its judgments dated 4 th
December, 2002, 10 th March, 2004 as well as 5 th
August, 2004.
In the latest MoEF’s amendment
Notification issued on 3 rd Nov. 2009, all coal
and/or lignite based thermal power stations and/
or expansion units in operation before the date
of this notification are to achieve the target of
100% fly ash utilization in five years from the
date of issue of this notification and the new
coal and/or lignite based thermal power stations
and/or expansion units commissioned after this
notification have to achieve 100 % ash utilization
in 4 years from the date of commissioning.
6.14.2 Monitoring of Fly Ash Generation
and Utilization
CEA monitors the fly ash generation
and ash utilization of coal/lignite based thermal
power plants pertaining to power utilities of
the Centre and the States. CEA has initiated
half yearly monitoring of data during the year
2008-09. The following main activities were
carried out during the year:
a) The data pertaining to 2008-09 (from
April 2008 to March 2009) was sought
from 81 coal/lignite based power plants
pertaining to 29 power utilities in 17 States.
The overall percentage of ash utilization for
2008-09 has been worked out to be about
57%. The ash utilization in various modes
of ash utilization during the year 2008-09 is
shown in Graph-I.
b) The progressive ash utilization data up to
the year 2008-09 has been compiled. (See
Graph-II).
"CEA-Helping the Transformation of Indian Power Sector"
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