基于Fluent下超细制浆粉碎刀头的流场分析
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摘要
结合超细粉碎技术原理,设计出了2种齿型式粉碎刀头,并使用Fluent仿真软件分析了在转速分别为6 000,9 000,12 000r/min时2种粉碎刀头内部压力、速度的变化规律,然后通过物料粉碎试验验证了2种刀头的粉碎效果,同时对2种刀头的能耗进行了对比分析。结果表明:中心结构为四叶刀片的齿型粉碎刀头,粉碎50g大豆所花的时间大约为2min,粉碎后大豆的平均粒径值大约为4μm,并且能耗比中心结构为三叶轮的刀头消耗更少,在6 000,9 000,12 000r/min转速下粉碎5min能耗分别为0.007 25,0.022 49,0.059 43kW·h。
Two kinds of tooth type pulverizing cutter heads are designed based on the principle of superfine pulverization technology,and two kinds of pulverizing knives are analyzed using Fluent simulation software at the speeds of 6 000 r/min,9 000 r/min and 12 000 r/min.The variation of pressure and speed inside the head was studied.Then the pulverization effect of the two cutter heads was verified by the material pulverization experiment.At the same time,the energy consumption of the two cutter heads was compared and analyzed.Results:The central structure was a four-blade blade tooth-crushing cutter head.The time spent smashing 50 g of soybean was about 2 min.The average particle size of soybean after pulverization is about 4 μm,and the energy consumption ratio was consumed.The center structure had less tip consumption for the three impellers.The energy consumption for crushing for 5 min at 6 000 r/min,9 000 r/min,12 000 r/min were approximately 0.007 25 kW·h,0.022 49 kW·h,0.059 43.kW·h,respectively,which had good practical application significance.
Two kinds of tooth type pulverizing cutter heads are designed based on the principle of superfine pulverization technology,and two kinds of pulverizing knives are analyzed using Fluent simulation software at the speeds of 6 000 r/min,9 000 r/min and 12 000 r/min.The variation of pressure and speed inside the head was studied.Then the pulverization effect of the two cutter heads was verified by the material pulverization experiment.At the same time,the energy consumption of the two cutter heads was compared and analyzed.Results:The central structure was a four-blade blade tooth-crushing cutter head.The time spent smashing 50 g of soybean was about 2 min.The average particle size of soybean after pulverization is about 4 μm,and the energy consumption ratio was consumed.The center structure had less tip consumption for the three impellers.The energy consumption for crushing for 5 min at 6 000 r/min,9 000 r/min,12 000 r/min were approximately 0.007 25 kW·h,0.022 49 kW·h,0.059 43.kW·h,respectively,which had good practical application significance.
引文
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[2]王春霞,高鹏,王晓梅,等.调配型大豆植物蛋白饮料的稳定性研究[J].中国食品添加剂,2014(8):17.
[3]杨新俊,崔政伟,张裕中,等.湿法超细粉碎制备全豆豆浆关键技术研究[J].食品与机械,2017,33(10):158-162.
[4]MESSINA M,HILAKIVI C L.Early in take appears to be the key to the proposed protective effectives of soy intake against breast canter[J].Nutrition and Cancer,2009,61(2):792-798.
[5]URSCHEL J R.Machine and method of comminuting aproduct:USA,3251389[P].1966-05-17.
[6]承子微.燃料乙醇生产用玉米秸秆等超大量湿法粉碎技术研究[D].无锡:江南大学,2008:1-19.
[7]戴宁,张茂龙,张裕中.农产品湿法超细粉碎技术与大豆全利用产品开发[J].食品科学,2011,32(S1):91-96.
[8]顾笑笑,张茂龙,赵龙,等.全谷物冲调粉高效加工技术研究[J].食品与机械,2013,29(6):207-210.
[9]张茂龙,陈锡春,高青令,等.高速切割技术及其在鲜湿豆渣超细粉碎中的应[J].食品与机械,2010,26(5):105-108,154.
[10]杨满盈,张裕中.剪切技术在鲶鱼加工副产物超细制浆中的应用研究[J].食品工业科技,2012,33(16):302-305.
[11]杨满盈.鱼副产品超细粉碎技术与装备研究[D].无锡:江南大学,2013:23-29.
[12]张凯,王瑞金,王刚.FLUENT技术基础与应用实例[M].北京:清华大学出版社,2010:68-175.
[13]丁欣硕,焦楠.14.5流体仿真计算从入门到精通[M].北京:清华大学出版社,2013:53-85.
[14]张裕中,臧其梅.食品加工技术装备[M].北京:中国轻工业出版社,1999:118-120.
[15]SHARMA P,CHAKKARAVARTHI A,SINGH V,et al.Grinding characteristic and batter quality of rice in different wet grinding systems[J].Journal of Food Engineering,2008,88(4):499-596.