Developing PDD (project design document) under CDM for fuel switching, industrial co-generation and surplus power generation

09 Jan 2005 26 Oct 2005
Brief details of the project is given in the following paragraphs.

Till March 2000 the requirement of M/s Indian Acrylics Ltd., Sangarur (Punjab) of process steam was met by 3 onsite oil fired process steam boilers. The oil-fired boilers have been converted subsequently to rice husk fired fluidized bed boilers, in phases during 2001-02. The specifications of the oil-fired boilers being used earlier and the specifications of the converted boilers are given in annex 3. Each of the boilers is capable of producing 16 tons of steam per hour at 18.75 kg/ cm2 pressure and 350oC at the rated capacity. A part of the process steam is required at 425oC, which is being produced by passing the saturated steam, from the main header, through a separate oil fired steam superheater (this was being done before the fuel was switched to rice husk).

As replacement of existing steam pressure reduction and de-superheating system, one back pressure turbine-generator set of 1.025 MW capacity has also been commissioned by July 2003 to run the process steam boilers in co-generation mode. The power generated from this is being used in the plant itself, to meet part of its electrical power requirement.

Towards an effort for green energy generation, the process steam boilers, after conversion, use rice husk as fuel. This will mitigate emission of carbon- dioxide firstly due to replacement of fossil fuel with a carbon neutral fuel and secondly due to generation of power using a carbon neutral source of energy. The project boundaries for mitigation of GHG due to process steam will be the physical boundaries of the process plant. The mitigation of GHG due to production of power (due to operation in Co-generation mode) will take place due to the replacement of power supply from the state electricity grid which gets power from a combination of fossil fuel fired, hydro and nuclear power plants.

The project, apart from mitigating the emission of GHG, reduces the local emissions of sulfur and other pollutants like smoke/soot, etc associated with the burning of fossil fuels. The project is in line with the development priorities of the local government of increasing the use of renewable sources of energy and development of power sector (Punjab Government's New and Renewable Sources of Energy (NRSE) Policy 2001). The project has led to generation of employment at the local levels for collection and supply of rice husk. The project has led to increase in the income of the local farmers, as they are now able to get money for the agro-residue for which there was no market. Most of the husk earlier, in the absence of any market was dumped and used to burn in uncontrolled manner in and around rice mills.