thermal power development - Infraline

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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" 81
Central electricity authority Annual Report 2009-10 c) A report on Fly ash Generation and utilization data of 81 Thermal Power Stations as utilities-wise, region-wise, sector-wise for the year 2008-09 was prepared. The Graph-I actual ash generated was 116.69 MT and ash utilized was 66.64 MT and the overall utilisation percentage was 57.11. Graph-II ***** 82 "Energy Saved is Energy Generated"
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