TWO-BURNER RICE HUSK GAS STOVE FOR DOMESTIC OR INSTITUTIONAL COOKING OPERATION

Engr. Alexis Belonio
Project Director
Reactor
Chimney
Appropriate Technology Center
Central Philippine University
Iloilo City, Philippines
Good news to everybody!
The two-burner rice husk gas
stove technology is already
available for domestic
household or for institutional
use such as restaurant, school
canteen, andsmall hotels.
Instead of spending fuel for
LPG, a rice hull fuel gas stove
is a good alternative to reduce
fuel cost. Rice husk is gasified
inside the reactor and the gas
generated is ignited in the
burner to produce luminous
bluish flame for cooking.
The two-burner rice husk gas
stove technology is another
development in line with rice
husk gasification project of the Department of Agricultural Engineering and
Environmental Management of the College of Agriculture, Central Philippine University
in Iloilo City, Philippines. This technology was developed with the assistance fromthe
group of undergraduate agricultural engineering students Norman Apote, Daniel Belonio,
and Lucio Larano.
Secondary
Burner
Primary
Burner
Gas Pipe
Ash
Chamber
The two-burner rice husk gas stove as shown consists of (1) Primary and Secondary Gas
Burners - where the gas is burned to produce luminous blue flame color, (2) Fuel Reactor
- where rice husk is gasified during operation by burning the fuel withlimited amount of
air, (3) Char Chamber – where burned fuelis discharge fromthe reactor after
gasification, (4) Blower – which supplies the needed amountof air for gasification, (5)
Char Lever – which discharge burned rice hull after gasification, (6) Control Switch –
which increase or decrease the flame intensity, (7) Gas Pipe – which convey the gas
generated fromthe reactor to the burner, and (8) Chimney – which discharges unwanted
gases .
The fuel reactor can be placed
outside the kitchen while the
burner can beplaced inside for
much cleaner operation. Unwanted
gases can be discharged outside the
kitchen through a chimney that can
be extended through the wall or
roof.
Flammable gas, primarily of
carbon monoxide, hydrogen, and
methane are produced during
operation as the burning fuel
moves down the reactor. Both
burners can be used at the sametime and can be
finely controlled using a ball valve as well as a
rotary switch.
The stove consumes 2.5 kilogramof rice husk per
load at 40 to 45 minutes continuous operation.
The energy input for the blower is 44 watts at 220
volt line. The specific gasification rate is 126.2
kg/hr-m
2
while the fire zone rate is 1.75 cm/min.
Ignition of fuel and gas will only tookabout 2
minutes. The advantage features of the stove are as follows: (1) Easy to start with almost
no smoke at all, (2) Convenient to operate by using ball valves and switch knob to control
the flame, (3) Clean to operate with no fly ashes,(4)
Low operating cost since it uses rice husk as fuel
and minimal amount of electricity, and (5)
Affordable.
The investment cost for the stove is P8,500.00 per
unit (Table-Top Model) and a savings of P4,887.91
on fuel cost can be derived within one year of
operation as compared with the use of LPG stove.
The technology is now in commercialization stage.
Interested organizations to adopt this technology
may contact the Project Director, Appropriate
Technology Center, Department of Agricultural
Engineering and Environmental Management,
College of Agriculture Central Philippine
University, Iloilo City, Philippines. Telephone
number 063-33-3291971 loc 1071, email ad atbelonio@yahoo.com, and mobile phone
063-0916-7115222