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    • 7. 发明授权
    • Process for sampling in particle-laden gas streams
    • 颗粒载气流中取样过程
    • US5841037A
    • 1998-11-24
    • US807188
    • 1997-02-27
    • Benno UlfikMathias BenzJorg Rainer SchmitzHeiko Herold
    • Benno UlfikMathias BenzJorg Rainer SchmitzHeiko Herold
    • G01N15/00B02C19/06G01N1/02G01N1/04G01N1/22G01N1/24G01N15/02G05D5/06G01N1/00
    • G01N1/2247B02C19/06G05D5/06G01N1/2202G01N1/24G01N2001/2223G01N2001/225G01N2001/242
    • In the process for the continuous collection of pulverulent or dusty samples from a particle-laden stream, a sample stream is drawn off from a particle-laden main stream in a pneumatic conveying line 17 and passed via a collection line 9 to a particle size measurement device 10. In order to reduce spin, the main stream in the conveying line 17 is passed through a venturi-like cross-sectional constriction 3, 4, 5, the cross-sectional area of which is 10 to 60% of the free cross-sectional area of the conveying line 17. Samples are then collected downstream from the cross-sectional constriction through one or more probe tubes 7, wherein a partial stream is collected from the main stream parallel to the direction of flow thereof. In conjunction with a jet mill 14, into which the product to be ground and the propellant air are continuously introduced, the particle size distribution measured in the continuously collected sample stream may be used as a control parameter in order to adjust a parameter which determines particle size distribution of the jet mill 14 in such a manner that the particle size distribution in the product stream remains constant.
    • 在从载有颗粒的流中连续收集粉状或多尘的样品的过程中,将样品流从气流输送管线17中的载有颗粒的主流中排出,并通过收集管线9通过粒度测量 装置10.为了减少旋转,输送管线17中的主流通过文氏管状横截面收缩部3,4,5,其横截面积为自由交叉的10至60% 然后通过一个或多个探针管7从横截面缩颈的下游收集样品,其中从主流平行于其流动方向收集部分流。 结合喷射研磨机14,待研磨产物和推进剂空气连续引入其中,可以将连续收集的样品流中测量的粒度分布用作控制参数,以便调整确定颗粒的参数 喷射磨机14的尺寸分布使得产品流中的粒度分布保持恒定。
    • 9. 发明授权
    • Method and apparatus for the metered feed of coarse granular material
into an air jet mill
    • 用于将粗颗粒材料计量进料到空气喷射磨机中的方法和装置
    • US5967429A
    • 1999-10-19
    • US74800
    • 1998-05-08
    • Benno UlfikMathias Benz
    • Benno UlfikMathias Benz
    • B02C19/06
    • B02C19/06
    • For the metered feed of coarse granular material into an air jet mill an injector 3 operated by propellent air is used, the coarse material being fed continuously to a closed injector hopper 6 provided on the injector 3. In the injector hopper 6, the pressure is measured at a product-free point and, by resetting the propellent air mass flow at the injector 3 is held constant at a preselected setpoint partial vacuum value. Said setpoint value is preferably set so low that at said pressure there is only just no return flow from the injector 3 into the injector hopper 6. The apparatus for effecting said method comprises a control loop having a pressure sensor 16 for measuring the flow in the closed injector hopper 6, a motor-adjustable valve 4, 5 as an actuator for varying the supplied propellent air mass flow and a loop controller, which compares the actual pressure value with a preselected setpoint value and supplies a control signal for operating the actuator 4, 5.
    • 对于将粗颗粒材料计量加料到空气喷射磨机中,使用由推进空气操作的喷射器3,粗料被连续供给到设置在喷射器3上的封闭的喷射器料斗6.在喷射器料斗6中, 在无产物点测量,并且通过重置喷射器3处的推进剂空气质量流量在预选的设定点部分真空值下保持恒定。 所述设定值优选设定得如此低,使得在所述压力下,只有从喷射器3到喷射器料斗6的返回流只有止回阀。用于实现所述方法的装置包括控制回路,该控制回路具有用于测量流量的压力传感器16 封闭的进样器料斗6,作为用于改变所提供的推进剂空气质量流量的致动器的马达可调节阀4,5,以及将实际压力值与预选设定点值进行比较并提供用于操作致动器4的控制信号 ,5。