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11.
介绍了玻璃钢用于制作离心机转鼓的特点 ,讨论了所用强度理论、原材料选择、转鼓的三层式结构 ,并通过实例进行了计算 ,得出了一些结论  相似文献   
12.
John T. Novak 《Drying Technology》2013,31(10):1257-1262
Dewatering of sewage sludges is usually carried out using belt filter presses or centrifuges. The ability to remove water from sludges by mechanical dewatering is a property of both the sludge and the equipment used for dewatering. Newer high-solids centrifuges can remove more water than a belt press but require a higher chemical conditioning dose. The Gt value, the product of the mean velocity gradient and the shear time, has been found to be a useful parameter for characterizing the shear in mechanical dewatering equipment. Dewatering can be considered a two-step process, filtration followed by expression. The expression step is the most important of these and the benefits of various sludge processing techniques and conditioning chemical types remains a fruitful area of research.  相似文献   
13.
An advanced centrifugal technique was developed to characterize the stickiness of tomato pulp at various moisture contents and temperatures. To provide tomato pulp samples with different moisture contents, tomato powder produced by a laboratory spray dryer was wetted to six different moisture levels. By noting the rotational speed for a tomato pulp droplet detachment and weighing the mass of the droplet remaining on the surface it is possible to gauge the approximate attachment forces holding the droplet to the substrate. The effects of droplet mass and centrifugation time after reaching the desired rotor speed on the detachment rate were also studied. The detachment force was found to increase at the beginning and then started decreasing as the moisture content decreased presenting a maximum at moisture content of about 34%. In addition, the higher the droplet temperature, the higher the attachment force.  相似文献   
14.
基于有限元法的卧螺离心机转鼓优化设计   总被引:6,自引:0,他引:6  
对卧螺离心机的转鼓进行参数化建模,以这些参数为设计变量,以几何、强度和刚度要求为约束条件,以转鼓的转动惯量为目标函数,基于有限元分析计算,对转鼓结构的几何尺寸进行优化设计,取得了良好的效果。  相似文献   
15.
卧式螺旋卸料离心机更新改造与应用   总被引:1,自引:0,他引:1  
介绍了50kt/a ABS生产装置扩能改造过程中引进的SC800H型卧式螺旋卸料离心机的工作原理、关键部件以及试车过程中存在的问题,针对该离心机改造后工作状况仍不理想的现状,采用LWL450×300-N型卧式螺旋卸料离心机替换,从而满足了连续性生产的需要。  相似文献   
16.
本文介绍了变频器直流共母线在石药集团维生药业离心机上的应用。  相似文献   
17.
本文介绍了变频器和PLC在石药集团维生药业离心机上的设计应用。  相似文献   
18.
Centrifuge modeling of the 17th Street Canal and Orleans Canal North levees was performed in this study. During hurricane Katrina the levees on the 17th Street Canal failed, leading to breaches in the outfall canal in the city. Two mechanisms were observed in the centrifuge modeling that could cause a breach. First, a water-filled crack formed in front of the floodwall as the water in the canal rose above the top of the levee. The levees on the 17th Street Canal, which were supported on clay foundations, failed when this cracking led to a translational (sliding) failure in the clay layer commencing at the toe of the floodwall. The levees at Orleans Canal North, where failure did not occur, were also modeled to demonstrate that the model tests could successfully simulate failure and nonfailure conditions. The centrifuge model tests identified the importance of the crack formation in relation to the stability of the floodwall. These tests also confirmed that levee geometry, floodwall depth of penetration, and the underlying soil profile were all critical to the performance of the system under flood loading.  相似文献   
19.
本文主要介绍糖厂现用连续离心机的传动机构、阻尼吸震、物料加温、均布、机壳结构、物料分离密封、润滑系统及机座等主要部件的改进及其应用效果。  相似文献   
20.
The behavior of geotextile-reinforced embankments during an earthquake was investigated using centrifuge model tests, considering a variety of factors such as gradient of slope, water content of soil, geotextile spacing, and input shaking wave. The geotextile-reinforcement mechanism was revealed on the basis of the observations with comparison of the unreinforced embankment. The geotextile significantly decreases the deformation of the embankment and restricts sliding failure that occurs in the unreinforced embankment during an earthquake. The displacement exhibits an evidently irreversible accumulation with a fluctuation during the earthquake which is significantly dependent on the magnitude of input shaking. The peak strain of the geotextile exhibits a nearly triangular distribution in the vertical direction. The embankment can be divided into two zones, a restricting zone and restricted zone, where the soil and geotextile, respectively, play an active restriction role in the soil-geotextile interaction. The soil restricts the geotextile in the restricting zone, and this restriction is transferred to the restricted zone through the geotextile. The strain magnitude of the geotextile and the horizontal displacement of the geotextile-reinforced embankment decrease with increasing geotextile layers, with decreasing water content of the soil, with decreasing gradient of the slope, and with decreasing amplitude of the earthquake wave.  相似文献   
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