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CHAPTER II THE RICE HUSK GAS STOVE
The rice husk gas stove is a recently developed device for domestic cooking utilizing rice husks as fuel. The stove was designed to burn rice husk using limited amount of air for combustion to produce a luminous blue flame, which is almost similar to that of the LPG stove.
Figure 4 below shows the various major parts of the rice husk gas stove. Two models of the stove are shown in Figure 5.
Figure 4. The Rice Husk Gas Stove Showing Its Various Parts.
Pot Support
Burner
Gasifier Reactor
Safety
Shield
Control Switch
Char Chamber
Fan
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(a) (b)
Figure 5. Two Different Models of the Rice Husk Gas Stove: (1) Without Safety Shield, and (b) With Safety Shield.
WARNING !!!
The rice husk gas stove emits a flammable and poisonous gas. Make sure that the gas produced during operation is properly burned in the burner. DO NOT INHALE THE GAS EMITTED FROM THE STOVE BECAUSE IT IS TOXIC AND INJURIOUS TO HEALTH. The stove should only be operated in a well-ventilated place to avoid suffocation.
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The Gasifier Stove Reactor
The gasifier stove reactor (Fig 6.) is the component of the stove where rice husks are placed and burned with limited amount of air. This reactor is cylindrical in shape having a diameter of 0.10 to 0.30 m, depending on the power output needed for the stove. The height of the cylinder varies from 0.4 to 1.0 m, depending on the required operating time. The cylinder is made of an ordinary galvanized iron sheet gauge no. 18 on the outside and of a stainless steel sheet gauge no. 20 in the inside. This cylinder is provided with an annular space of 2 cm, where the burned rice husks or any other materials is placed to serve as insulation in order to prevent heat loss in the gasifier. At the lower end of the reactor is a fuel grate made of stainless steel material,