Gasification of the plastic waste
4 years of R & D has enabled us to make Gasifiers (10 kW to 250 kW) to convert plastic waste into clean syngas.
The plastic waste is thermically gasified at high temperature over 1100°C.
The multi-fuel Gasifier is most compact in design with four-stage scrubbing and cleaning system. To take it to the required temperature, initially we can use diesel but we are opting for use of torrefied pellets that would save us up to 60% as compared to completely using diesel, the flue gases can be recycled, in a closed loop system whereby the emissions are minimized and thereby saving on the pellet fuel cost. Thus, low cost clean energy solution is incorporated in the design of the Gasifier. The cooking operation, where we use LPG, similar technology can be used for cost savings. The design depicted above is an integrated gasification system covering multiple processes to feed, to thermically modify the plastic molecules into gas, to filter the gas and water scrub the same and thereby produce clean syngas.
The syngas can be used in several forms for heating, bulk-cooking, run irrigation pump, D.G set or even converted into electricity.
We expect about 40 % recovery in terms of nm³ per kg of plastic waste. Multiple types of plastic waste can be fed except for waste such as PVC.
Very simplified operations. As in a single unit multiple processes are carried out and thus the space requirement is less. Such a design allows for localized and decentralized conversion of the plastic waste. To site an example, roadside unit serving food can house the Gasifier and use the self-accumulated plastic waste and convert it into clean syngas for multi stage cooking using a gas pipeline.
Another example is people using plastic in different ways, for e.g. chips packets. They are supposed to take plastic and dispose in a proper manner. So such localized units can cater to such requirements.
Water used for scrubbing is recycled back.
As an integrated bio fuel project, torrefied pellets can be used as primary fuel.
Short description of the process
- Plastic waste is conveyed into the primary chamber.
- At the required temperature, waste material is disassociated.
- Induced draft draws the pyrolized syngas into the secondary chamber where it is torched.
- Process eliminates the toxins, dioxins and furan molecules. Gas, thus, produced is cleaned and scrubbed in four stage process.
Energy is recovered in this system and cost of operation is optimized.