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| DTDC结构问题讨论 |
| Discussion of present problems for DTDC structure |
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| DOI： |
| 中文关键词: DTDC 豆粕 预脱层 脱溶层 美拉德反应 |
| 英文关键词:DTDC soybean meal pre-desolventization layer desolventization layer Maillard reaction |
| 基金项目: |
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| 中文摘要: |
| 对DTDC结构问题进行了讨论。在预脱盘保证豆粕水分不冷凝、豆粕为散状、脱除部分溶剂条件下，按脱溶负荷要求设计预脱盘数量。脱溶层料层高度500~750 mm，搅拌速度10~12 r/min和搅拌叶的形状让物料呈悬浮状，蒸汽密度为650~750 kg/（h·m2)，溶剂和水的共沸物的沸点达到67?℃以下容易挥发和汽提，缩短脱溶时间。直接汽层温度达到105?℃，促进豆粕发生美拉德反应。3 600 t/d的DT电机功率从原250 kW降到220 kW，豆粕残溶低于300 mg/kg，蛋白质溶解度达到75%以上，蒸汽消耗控制在203~220 kg/t。 |
| 英文摘要: |
| The problems for DTDC structure were discussed. Under the conditions of uncondensed moisture of the soybean meal on the pre-desolventization discs, scattered soybean meal, and some solvent removed, the number of the pre-desolventization discs were designed relying on the desolventization layer. 500-750 mm of layer height for desolvent layer, 10-12 r/min of stirring speed and the mixing blade shape kept the meal in suspension. The steam density 650-750 kg/（h·m2) was provided for the solvent and water azeotrope to reach the boiling point 67?℃ and easily to volatilize and strip,and the desolventization time could reduce. The temperature in the direct steam layer reached 105?℃ and improved the Maillard reaction. The installed capacity for 3 600 t/d DT reduced from 250 kW to 220 kW, the residual solvent in the soybean meal was less than 300 mg/kg, the protein solubility reached 75% or more, and steam consumption was controlled at 203-220 kg/t. |
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