共查询到20条相似文献,搜索用时 93 毫秒
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本文根据料仓受力分析,提出了一种新型料仓-倒圆锥形料仓。这种新型料仓可以比较彻底地解决仓内物料的“结拱”问题。实际应用表明,这一设计是完全成功的。 相似文献
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饲料厂粉尘爆炸机理与防爆措施 总被引:1,自引:0,他引:1
可燃粉尘以适当浓度分散在空气中,一旦着火、燃烧就会迅速传播。发生所谓粉尘爆炸。在所有出现可燃粉尘的行业,如饲料、面粉、亚麻、制糖、奶粉、橡胶、煤粉、木材粉、聚乙烯塑料、硫磺粉、铝粉等都是屑于可能产生粉尘爆炸的行业。在1952~1972年间,日本共发生粉尘爆炸事件155起,共死亡70人,伤344人,平均每年发生爆炸事件24.3起。平均每年死8.2人,伤18.2人。据美国保险公司报告,每年有记载的粉尘爆炸造成损失约为7500万美元。其中属谷物粉尘爆炸占30%,塑料粉尘占 相似文献
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Mary B Hall Jocelyn P Jennings Betty A Lewis James B Robertson 《Journal of the science of food and agriculture》2001,81(1):17-21
The objectives of this work were to evaluate the efficacies of commercial starch analyses and of starch analysis extraction and gelatinisation procedures. In Study 1, accuracy and specificity of commercially available starch analyses were evaluated with six co‐operating laboratories (five commercial, one university). Results from 11 test samples showed three laboratories with recoveries of purified starch of 92 g kg−1 or less. Three and four laboratories had inflated values when samples contained glucose or sucrose, respectively. Analyses appeared to have good specificity for glucose. Incompleteness of starch detection and interference by non‐starch carbohydrates can affect commercially available analyses. In Study 2, extraction with 80:20 ethanol/water (v/v; 80EtOH) or 90:10 ethanol/water (v/v; 90EtOH) to remove low‐molecular‐weight carbohydrates, and gelatinisation with heat, alkali (KOH), 6 M urea or 8 M urea were evaluated. Extraction with 80EtOH or 90EtOH reduced interference from non‐starch carbohydrates. Gelatinisation with heat was adequate for good recoveries of starch glucose for both control (non‐extracted) and 80EtOH‐extracted samples; gelatinisation with alkali was required for 90EtOH‐extracted samples. Recoveries of pure starch samples were greatest with no extraction and heat gelatinisation. 80EtOH extraction with heat gelatinisation appears to be an adequate preparation method when removal of low‐molecular‐weight carbohydrates is desired. © 2000 Society of Chemical Industry 相似文献
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本文对小麦面粉加工工艺设计、小麦淀粉乳中pH和温度设计、小麦淀粉乳液化后层流形态的设计、小麦淀粉乳制糖在酶制剂选型上的设计的相关要点进行分析,以进一步优化小麦淀粉乳制液糖工艺. 相似文献
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淀粉在造纸工业中的应用 总被引:8,自引:0,他引:8
本文叙述了天然淀粉的性能及三种改性淀粉的改性方法和应用效果。三种改性淀粉是阳离子淀粉、氧化淀粉及磷酸酯淀粉。阳离子淀粉具有增强助滤作用。氧化淀粉用作纸张的表面施胶剂可提高纸的表面强度。磷酸酯淀粉用作施胶助剂,可以提高施胶度。 相似文献
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