Description of technology
Three stages gasifer technology in Thailand is implemented at Thungtrapungclone area, Ladbualuang, Ayuthaya province. Rice husk is used as biomass feedstock. The operation principle of this technology is as follow: 1. Oven drying of rice husk: the exhaust gas will be used to heat up rice husk to about 100 oC in order to decrease its moisture content. The electric blower will then be used to transport the rice husk to pyrolysis reactor. 2. In the pyrolysis reactor, hot sand will be served as a heat source. Together with usingelectric blower, the continuous flow of hot air inside the reactor will circulate rice husk in the form of bubbling bed, and thus enhancing the volatile compound to be separated out of the rice husk. The temperature inside this unit is about 450-600 oC. During starting time of the system, LPG will be used at the mass flow rate of 0.6 kg/h to start up the heating system. 3. Partial oxidation occurs at the throat of reactor. This is the incomplete combustion process of volatile organic compounds and tar (byproduct from pyrolysis) at temperature between 850 oC to 1100 oC. The end product of this process is CO2, water, and ash. 4. The CO2 obtained from partial oxidation is then converted in to synthetic gas (CO, H2, CH4) in the reduction zone by using ash. 5. The synthetic gas produced might still contain some dust and moisture, therefore gas cleaning and cooling need to be done as final steps. Cleaning of fuel gas is operated by using a cyclone, a wet scrubber, and a bag house filter. The fuel gas is cool down to about 45 oC before it can be used in the gas engine.
Specific Features
Annual electrical energy output from using rice husk as fuel is about 840,000 kWh
Keywords (maximum 5)
Three stages gasifier
Status of Technology
Commercial Prototype
1. Use of waste heat obtained either from vehicle exhaust pipe or gas engine can help to save the thermal energy consumption during drying process of rice husk for up to 1,538,400 kWh per year. 2. By
Areas of application/Business opportunities
This technology might be applied to use at some potential rice mill plants
List of components used
1. fuel gas production system composes of 1.1rice husk transport system unit 1.2 pyrolysis/gasification reactor 1.3 gas cleaning/cooling unit 2. gas engine/ power generator
Name of the component
Electric Generator Set
Jinnan Diesel Engine Co. ltd
Capacity/Wattage (W)
200 KW
Voltage input (V)
Current consumed (A)
Efficiency (%)
40,000,000 Baht for process control building
Already owned components
14,050,000 Baht for power generation system from rice husk
approximately 5,000,000 Baht
Total investment
approximately 60,000,000 Baht
Technology transfer terms
Research Partnerships
Name of the organization
The Chaipattana Foundation
Address/Zip code
2012 Soi. Arun-amarin, 36 Arun-amarin street, Bangyeekhun, Bangplud, Bangkok 10700