DESIGNING, MANUFACTURING, AND TESTING OF GAS FILTERING AND COOLING EQUIPMENT FOR THE RICE HUSK GASIFIER

Abstract

Using renewable energy sources to replace fossil energy sources is one of the
best solutions to solve energy shortages, environmental pollution and minimizing
the impact of the greenhouse effect. The high potential biomass energy source in
Vietnam is an one needs to be exploited and applied, in which biomass gasification
methods to supply gas for industry and life needs to be studied and developed.
However, the gas product obtained from biomass gasification (raw gas) contains
many impurities such as tar, alkali metal, HCl, nitrogen and HCN, H2S and COS....
Therefore, the raw gas requires to be cleaned and cooled before they might be used
by using suitable technology and equipment. Two approaches of raw gas cooling
and cleaning are venturi tube device and cyclolone filter device combined with
forced circulation convection cooling have been developed, manufactured, and
tested successfully. The results indicate that the cyclolone filter device combined
with forced circulation convection cooling has many advantages and cools the gas
temperature below 500
C before it might be used for storage step.