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| Research and development of a new grain and oilseed dryer |
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| DOI： |
| KeyWord:grain and oilseed dryer negative pressure drying energy conservation and environmental protection drying quality |
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| Abstract: |
| In order to improve problems such as the low thermal efficiency, hot air temperature fluctuations and environmental pollution existed in drying process of grain and oilseed in China, a new type of grain and oilseed dryer was researched and developed.The integrated design and innovative application of the process parameters, structure, efficient heating device, multiple environmental protection device, process monitoring and control of the new grain and oilseed dryer were expounded. The new grain and oilseed dryer adopted negative pressure suction air intake form, different drying retardation time ratios were set on the process parameters, the hot air volume increased by 20% compared with the previous design, the apparent wind speed was controlled at 0.20-0.25 m/s, and the material temperature was monitored in real time to control the heating temperature and time. The structure adopted the fully galvanized assembled structure, the combination of multi-stage drying and retardation process, the variable cross-section angular upper and lower staggered arrangement form, the gradient cooling mode of layered air intake, the frequency conversion motor-driven adjustable discharging mechanism, the multi-point feeding and discharging mode, while using natural gas linear combustion technology and combustion devices for heating, gravity settling combined with centrifugal dust removal for drying exhaust gas treatment and multiple temperature sensors for drying process monitoring and control. The actual application shows that the new model has the characteristics of high efficiency, energy saving, low carbon, clean, in line with the actual needs of China′s modern agricultural development of high quality. |
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