并通过实验求得此工况下床层的临界流化速度。
When cotton stalk and bed material are well mixed, the minimum fluidizing velocity can be achieved by experiment.
结果表明：临界流化速度随着粒度的增大而增大；
The experimental results indicate that the critical air velocity increases with the increase of the particle size of arenaceous quartz.
而在粒度一定的情况下，床层高度的变化不影响临界流化速度值。
Meanwhile, the change of the bed height does not affect the critical air velocity when the particle size of arenaceous quartz is fixed.
调节副床二次风流化速度，可以调整两床物料循环率的分配比例。
The pressure distribution and solid recirculation rate were investigated in dual circulating fluidized beds.
本文首先从理论上分析了温度对气固流化床的临界流化速度的影响。
In this paper, the influence of temperatures on the critical fluidization velocity was analyzed theoretically at first.
填料膨胀率的大小与液体流量、填料的流化速度及自由沉降速度有关。
The expansion ratio is related to the liquid flow rate, fluidization velocity and free descending velocity of the packing material.
结果表明，粉状物料的浓相输送与流化速度、补气量、输送管径有关。
For dense phase conveying of pulverized material there is a close relationship among many parameters, such as fluidization velocity, carrier gas flow rate, pipe diameter etc.
从流化床临界流化速度的定义出发，得出了振动流化床第一临界流化速度数学模型。
Based on the original definition of the critical fluidization velocity, a mathematical model was proposed to predict the first critical fluidization velocity.
本文利用流化床内压降随表观液速的变化阈值来确定流化床的起始外循环流化速度。
The onset velocity was an important parameter that affected the normal operation of the gas liquid solid outer circulating fluidized bed.
试验获得了最小流化速度、固含率和床层高度的关联式，预测值与试验值吻合良好。
Based on the experimental data, the correlated equation was obtained to estimate accurately the minimum fluidized velocity, solid holdup and bed height.
根据振动流化床床层动力学特性，提出了第一、第二流化段，第一、第二临界流化速度的概念。
According to the dynamical characteristic of the vibrated fluidized bed, the first and second fluidization stages and the first and second critical fluidization velocities were put forward.
提出计算流化压降的修正式和临界流化速度的准数关联式，为进一步研究此设备的干燥性能打下基础。
The modified correlations of dimensionless groups for calculating both-Ap and Um are presented as the basis for further study on the drying performance of the dryer.
为了评价非磁性粘性颗粒在磁场流化床中的流化性能，测量了最小流化速度、床层压力降和床膨胀高度。
The phenomenon of agglomeration and its various influencing factors, the sintering minimum fluidization velocity, the parameter change of gasification when it was agglomeration are also presented.
由于床层中没有大气泡生成，与普通流化床（CFB）相比，VFB具有更低的初始流化速度和更大的床层空隙率，而且流化稳定。
A comparison of VFB and CFB indicates that VFB has lower minimum fluidization velocity, higher bed voidage and more steady fluidization because big bubbles can not be formed in the bed.
根据流体动力学理论分析了颗粒径与流化速度的关系，通过利用或建立简单的传热与燃烧模型，定量计算了不同粒径无烟煤颗粒的燃尽时间和一次通过炉膛时的停留时间。
With using some simplified heat-transfer & combustion model, the burn-out time and the stay-time(one times through furnace) of a single coal particle in the furnace of CFB were also calculated.
研究了流化数、射流初始速度、颗粒平均粒径及静态床层高度对射流脉动特性的影响。
The effects of fluidization number, injection velocity, particle mean diameter and static bed height on jet fluctuation are discussed.
采用切断流化床气源，并跟踪测量床面塌落速度的方法，可以测得浓相空隙率。
Dense phase voidage can be estimated by cutting gas flow and following the rate of bed collapse.
本文介绍了流化床中床料空隙率，气泡尺寸，气泡上升速度沿床高变化的试验结果，提出了相应的无因次关联式。
This paper reports some experimental results on variation of voidage in bed materials, bubble size and bubble rising velocity etc along the height of the bed.
开发的流化床内颗粒速度场测量系统应用于流化床内颗粒的速度测量，实验表明，这种测速法的相对误差在5%以下，具有较高的精度。
Experiment shows that the system developed in this paper can be applied successfully in the measurement of velocity of particles in fluidized bed (with relative error less than 5%).
针对流化床试验研究中测量颗粒浓度、颗粒速度的多种新兴的非浸入式测试技术进行了较为详细的论述。
In present paper an overview of advanced non-invasive measurement techniques which are used to measure the particles concentration and velocities in the fluidized beds are discussed.
对实验室原有的DPIV系统进行了改进，并用该系统初步研究了内旋流流化床颗粒运动的速度场。
An improved version of the existing DPIV (digital particle image velocimetry) in the lab has been employed to conduct a preliminary research of the velocity field of the ICFB particle movement.
从气相含率、液体循环速度和体积氧传质系数方面研究自行设计新型结构的三重环流生物流化床的流体力学与传质特性。
Hydrodynamics and mass transfer of triplet loop biological fluidized bed reactors were studied in terms of gas holdup, liquid circulation velocity and volumetric mass transfer coefficient.
总之，颗粒性质、流体性质、流化床的操作参数对颗粒的浓度分布、速度分布及管路压降影响很大。
In a word, the velocity of particle, the particle concentration and pressure drop of pipe are affected by character of particle, character of liquid and operating parameters of fluidized bed.
研究了压力、静止床高及流化风对最小喷动速度的影响。
The influence of pressure, static bed height and fluidized air on the minimum spouting velocity was studied.
以气泡在上升运动过程中的受力分析为基础，建立了描述单个变形气泡在液-固流化床中上升速度的理论模型。
A model for the rise velocity of a single deformed bubble in liquid solid fluidized beds was formulated, based on the analysis of the forces acting on a bubble.
测量了床内颗粒速度分布，考察了操作条件、体系结构等因素对流化床流动特性的影响。
Particle velocity distribution in the bed was measured to investigate the influence of manufacturing conditions and structure of the bed.
产品层被流化后固体颗粒和气体之间的接触面积大大增加。热传导的速度非常快。
The large contact area in the fluidized bed provides a rapid heat transfer between solid particles and gas.
产品层被流化后固体颗粒和气体之间的接触面积大大增加。热传导的速度非常快。
The large contact area in the fluidized bed provides a rapid heat transfer between solid particles and gas.
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