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Raman T.G.S.,Seshasayee Paper and Boards Ltd.
IPPTA: Quarterly Journal of Indian Pulp and Paper Technical Association | Year: 2011

Energy Conservation in pulp and paper mills, is not restricted to one form of energy management. Power and Steam Management go hand in hand, with Climate Change Development, adding as the third dimension. The paper aims at bringing out select innovative climate friendly combined heat and power (CHP) schemes relating to Chemical Recovery high pressure Cogeneration plant being successfully implemented in Seshasayee Paper. Black liquor is a Carbon Neutral fuel and hence CHP from the Chemical Recovery Cogeneration unit would be one of green energy. The 900 TPD BLS Chemical Recovery Boiler is designed with the highest operating steaming conditions in the sub-continent with high efficacy in both the phases (600 & 900 TPD BLS) of operation. In order to gain increased mileage of Carbon Neutral power, low pressure steam extraction flow is maximised with minimal steam extraction at medium pressure in the 16 MW Extraction Back pressure steam turbo-generator. The added benefit is one of increased power conversion because of reduction in desuperheating of low pressure steam after turbine nozzle, as also lowering the turbine extraction pressure by another 0.5 bar. With all of the above in place, the energy conversion to electrical power achieved is of the highest order. Since this carbon neutral power produced to the tune of around 8.5 MW-replaces grid power (derived from fossil fuel), emission reduction is estimated at ∼ 4000 tCO2(equiv)/month, which certainly is of a tall order for the boiler firing 600TPD BLS. Added to the above, is the contribution to Climate Change Development by way of minimal N2O emission in stack gas, which had been made possible through multi-air staging and high combustion temperature of Recovery Boiler. Hence Carbon Foot Print associated with the final product ( paper) is greatly reduced through maximizing usage of green energy from the Recovery Cogeneration plant. Source


Sundararamsan T.G.,Seshasayee Paper and Boards Ltd.
IPPTA: Quarterly Journal of Indian Pulp and Paper Technical Association | Year: 2013

An Innovative scheme using Nanotechnology integrating Corrosion mitigation with low temperature heat containment had been developed specifically for use in Paper mills. The specialty of Nansulate® coating which had innumerable successful heat recovery case studies to its credit is planned to be extended to hitherto untried applications in Seshasayee Paper and Boards Ltd. The paper highlights the protective feature of corrosion mitigation in one case and yet effecting energy transfer and Carbon emission reduction in low end heat recovery in other case. The case study is unique in that Nansulate® concept is being initiated in stack of Coal fired Boiler with the singular objective of corrosion prevention of the base material. The other case study relates to efficient heat containment and CUI prevention in chiller unit of C1O2 plant with Nansulate® coating application. The combined success of Nansulate® would probably be the answer for Corrosion mitigation alongside heat recovery in industries in general and Paper and Pulp mills in particular, thereby targeting the 3 Es Energy Conservation, Environment Management and Emission Reduction, all in one. Source


Sundara R.T.G.,Seshasayee Paper and Boards Ltd.
IPPTA: Quarterly Journal of Indian Pulp and Paper Technical Association | Year: 2014

In any steam turbine, the generator part is the lifeline of power generation. The increased power generation results in iron and copper core losses through increased winding temperature. In this paper, the need for maintaining the winding temperatures well within limits at all loads & power factor of operation of both the 21 MW as well as 16 MW Steam turbogenerators through periodic cleaning of the heat exchanger (interior and exterior) is brought out through live illustrations. This apart ,the cathodic protection scheme through provision of zinc anode in place in the heat exchanger shell for galvanic corrosion mitigation, thereby ensuring longevity and continuous availability of the generators is discussed. Source


Velmurugan S.,Seshasayee Paper and Boards Ltd. | Shanmugam K.,Seshasayee Paper and Boards Ltd.
IPPTA: Quarterly Journal of Indian Pulp and Paper Technical Association | Year: 2011

Seshasayee Paper and Boards Ltd is one of the largest integrated pulp and paper mills in Tamil Nadu. The mill is using about 3 00 000 MT of wood as raw material (Eucalyptus and Casuarina) for its manufacturing process. The above quantity of raw material is being sourced from TAFCORN and from the "Farmer's Plantation". To augment the wood based raw material on sustainable basis for the industry, the company has initiated large scale Tree Plantation programme through Farm Forestry Scheme since 2005 and has covered 24 000 acres so far. With unique scientific management and advanced technical know how, greater emphasis is being given for Genetic quality of the planting material combined with improved packaging practices. Significant gains in productivity of Eucalyptus have been achieved through clonal planting material raised from apical shoot cutting, adopting optimum spacing for planting, application of organic and inorganic fertilizers and ploughing the field twice in a year. Nearly 20 lakhs site specific clones are produced and supplied to the farming community at subsidized rate. Productivity of Farm Forestry eucalyptus plantation varies between 45 MT 50 MT per acre on 5 years rotation. Further R&D will focus on increased productivity of land, improved pulping yield in pulp production. In the area of Casuarina, seedlings are raised from seedling seed orchards and clonal material is being produced and supplied to farming community to a level of 2.5 crores per annum. The productivity of Casuarina is enhanced from 25-40 MT per acre in the seed route to about 60 MT per acre in clonal plantation on 3-4 years rotation. Source


Sundara Kumar D.,Seshasayee Paper and Boards Ltd. | Marimuthu P.,Seshasayee Paper and Boards Ltd.
IPPTA: Quarterly Journal of Indian Pulp and Paper Technical Association | Year: 2012

As the demand for paper products, had increased with economic development of the country, the industries expanded its capacity from time to time. Of late, the paper industry is faced with serious problems due to shortage of raw materials. The problem of finding enough quantities of suitable raw material to meet the increasing demand for paper industry is a continuing one. The main source for the larger mills was forests. Ecological and environmental imperatives dictate that pulp and paper industry should look for alternative raw materials, particularly agricultural wastes which are annual and replenish-able. Indian Paper Industry is primarily dependent on three major raw material sources viz. wood from forests, agricultural residues and secondary fibers. Bagasse and straw were the major non-wood fiber used in most of the mills. Sweet Sorghum stalks found to be available abundantly. This move is not only going to solve environmental problem but also provide unique type of raw material for paper manufacturers. Sorghum has wide adaptability it can be grown in different type of soils. Development of Sweet Sorghum will play an important role in promoting the development of agricultural production and its related products, paper making etc. This paper deals with the use of Sweet Sorghum as an alternate raw material for papermaking. Pulping and bleaching studies were carried out and results were compared with Bagasse. The experiment results prove that the sweet sorghum stalks are found to be better raw material source for papermaking. Source

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