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首页> 外文会议>SME annual meeting and exhibit 2008 : New Horizons-New Challenges >NOVEL PASSIVE TECHNOLOGY FOR ENTRAINED AIR MEASUREMENT IN PIPES AND GAS HOLDUP MEASUREMENTS IN COLUMN CELLS
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NOVEL PASSIVE TECHNOLOGY FOR ENTRAINED AIR MEASUREMENT IN PIPES AND GAS HOLDUP MEASUREMENTS IN COLUMN CELLS

机译：新型被动技术用于管道中的夹带空气测量和柱状细胞中的气体滞留量测量

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Measurements of the quantity of entrained air within processes have challenged instrumentation developers for years. This is particularly true in the unique and demanding operating environment and applications seen in minerals processing. In minerals processing applications, entrained air plays a role in errors seen within nuclear density gauge measurements and in pumping efficiency. It is also the major component of flotation processes. The measurement of the quantity of entrained air, known as the gas void fraction, can now be performed from the outside of a process pipe through CiDRA's patented passive sonar array-based technology. Within column cells, the need for a robust, no maintenance, accurate means of measuring the entrained air, known as gas holdup, has resulted in a submersible version of this technology.rnCiDRA's meter technology calculates the gas void fraction by first measuring the speed at which naturally occurring sound in the process slurry propagates past an axial array of sensors. These sensors are incorporated in a band that is wrapped around the outside of the pipe, resulting in no process downtimes for installation and unprecedented reliability. A known relationship between this speed of sound and the entrained air captured in the form of bubbles within the slurry is then applied in CiDRA's meter to calculate the gas void fraction. This paper will present the measurement technology, its operation, its calibration and its application in a variety of gas void fraction and gas holdup measurement situations such as pumping efficiencies, hydrocyclone operation, external sparging, and column cells.
机译：多年来，过程中夹带空气的测量一直对仪器开发人员构成挑战。在矿物加工中独特且苛刻的操作环境和应用中尤其如此。在矿物加工应用中，夹带的空气在核密度仪测量中发现的误差以及泵送效率中发挥着作用。它也是浮选过程的主要组成部分。现在可以通过CiDRA的专利被动式声纳阵列技术从过程管道的外部进行夹带空气量的测量，称为气体空隙率。在柱状单元中，需要一种坚固，无需维护的精确测量夹带空气的方法（称为气体滞留率），从而导致了该技术的潜入式发展。rnCiDRA的仪表技术通过首先测量速度来计算气体空隙率。过程浆液中自然产生的声音传播通过传感器的轴向阵列。这些传感器被结合在一条绑在管子外部的带子中，从而不会因安装而停工，并具有前所未有的可靠性。然后，将这种声速与浆液中以气泡形式捕获的夹带空气之间的已知关系应用于CiDRA流量计中，以计算气体空隙率。本文将介绍测量技术，其操作，其校准及其在各种气体空隙率和气体滞留率测量情况下的应用，例如泵送效率，水力旋流器操作，外部喷射和柱池。

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