EPPI is establishing Biomass Energized Electrical Power Station (BEEPS) using the home grown biomass. Many more such power stations based on biomass security are likely to follow.
Biomass Gasification Technology
Biomass Gasification Technology is an eco-friendly alternate energy source that can help organizations gain a competitive advantage. In fact, gasification is the cleanest, most efficient combustion method known. Biomass gasification is the process of conversion of solid biomass into gaseous form. In simple terms, this uses the easily available biomass and converts it into energy.
The Process of Gasification
The process of gasification consists of partial Pyrolysis, Oxidation, and reduction under sub-stochoiomatric conditions. This generates producer gas, which contains H2, CO, CH4, CO2 and N2. This raw and hot producer gas contains particles of dust and condensable compounds, termed tar, both of which should be restricted to less than 15 ppm each, for the gas to be used in the internal combustion engine. The producer gas is cleaned and coded to ambient temperature for meeting thermal needs and power generation.
Components of the Gasifier Plant
A typical integrated biomass Gasifier plant has a biomass processor, waste heat drier, biomass gasification system, power package and effluent treatment plant. The following are the major components.
- Material handling system for conveying biomass into reactor.
- Gasifier Reactor (Stainless steel and ceramic lining inside) which generates producer gas.
- Cooling, scrubbing and cleaning system, which help to clean and cool the producer gas to ambient temperature, prior to admission to burners for thermal application or into IC engines for power generation.
- Water Treatment (water can be cooled, recycled and used after chemical treatment).
- Control room (MCC, PLC instrument panel and operating controldesk).
- Open top, twin air entry system, which ensures a better thermal environment compared to the conventional closed top model. Uses Unique staged air injection.
- Multi-fuel capability - wood residues and agro residues in briquetted form with moisture content less than 12%.
- Permits high gasification efficiency above 85%, with biomass consumption between 1.1 kg to 1.2 kg/KWH.
- Producer gas generated is of a very high quality. It is environmentally sound (CO2 neutral) with low Nox and no Sox in the engine exhaust.
- The gasifier is robust in construction with ceramic lining inside for a better operating atmosphere and considerably reduces gasifier maintenance.
- Reactor design with a ceramic inner shell - diameter and stages of air injection and associated details are tuned to provide a thermal and chemical environment to crack tar molecules to simpler compounds.
- Procedures and designs to harness the waste heat available from engine exhaust and engine cooling water for other heating and cooling applications.
- In-built safety features that isolate the gasifier in case of an emergency shut down.
- Effective gas cleaning system which provides gas with less than 15 ppm of suspended matter to meet quality standards set by engine manufacturers.
- Eligible for benefits under CDM.