The Gasifier’s versatile two-stage (gasification/thermal oxidation) structure creates producer gas from wet biomass through gentle updraft gasification in the first stage followed by a thermal oxidization process (ignition and burning) of the producer gas under vigorous cyclonic conditions to ensure complete combustion in a second stage. The 1010°C (1,850°F) products of combustion from a 105 GJ/h (100 million Btu/h)
Gasifier are routed to a waste heat recovery unit that can be used to produce steam for a condensing steam turbine electricity generating set or, alternatively, heat thermal transfer fluids for a turbine generator. Net power supplied to the electricity grid by a single 105 GJ/h Gasifier unit is approximately 5.5 MWe.
Compared to other gasification technologies the Gasifier’s parasitic load for operating the plant is minimal, thus making it an efficient means to generate electricity.
The versatility of the Gasifier allows it to be operated in tropical or temperate climates provided the moisture content of the biomass is between 35% and 60%. A 105 GJ/h Gasifier could utilize the following MSW loads as fuel.
- 287 tonnes/day of MSW at 35% moisture content; or
- 358 tonnes/day of MSW at 45% moisture content; or
- 476 tonnes/day of MSW at 55% moisture content.
The need for a minimum of 35% moisture content means that energy from the process does not need to be parasitized for drying the waste prior to processing, as is required in other gasification technologies on the 3 market, meaning more energy is available for generating electricity, thereby resulting in a higher output efficiency.
Assuming an average of 1.5 kg of MSW generated per capita, a single Gasifier unit can convert the organic fraction of municipal solid waste into heat for communities ranging in population size from 184,000 to 305,000.
The Gasifier is the cleanest wet biomass gasifier/thermal oxidizer currently available in the market.
Two Gasifiers were build previously Solway, Minnesota, USA and another two in Bahau, Malaysia which was selling electricity to the Malaysian grid from a generation capacity of over 10.5 MW while also generating revenue in the form of carbon credits from CDM.