| Summary: | 碩士 === 國立中央大學 === 機械工程研究所 === 95 === The agriculture of Taiwan developed prosperity. The treatment of agricultural wastes has been failed to deal carefully with all the time. RDF technology was used as the main shaft in this research and the agricultural wastes of rice straw carries on the discussion. The expectation can bring a good contribution for the treatment which discards the rice straw.
The influential parameter of pelleting includes moisture content, mold design and pelleting pressure.
The rice straw that was just gathered in nearly had 70% extremely high moisture content and was not suitable for pelleting, so regard reducing moisture content of rice straw as the main goal. The result of study found that if shines the rice straw under the fine condition on day, spend about 2 days can reduced moisture content of rice straw under 14% suitable for pelleting.
Because the rice straw is very fluffy, so the purpose of pelleting lies in convenient transportation. The best pelleting condition includes mainly: it makes the density higher than 1 g/cm3 that the packing amount needs reaching, the moisture content is in 8-14% of the ranges, but if over 20% will cause the rice straw it was unable to pellet and pelleting pressure was higher than 40 kg/cm2.
The difference of the moisture content is the greatest reason for influencing the volume expansion of the finished product; it will cause the volume of the finished product to have inflation by a large margin very that the moisture content is more than 20%.
This research also probes into the energy consumed in the course of making RDF. The main purpose is because RDF process needs to use energy made to it, and then burning and giving us energy, so energy benefit is an important topic.
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