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Method and device for online measurement of liquid holdup of rotating packed bed

A technology of rotating packed bed and liquid holdup, applied in the direction of material resistance, etc., can solve the problems that are not suitable for the measurement of rotating packed bed, and achieve the effect of fully reflecting the details and accurate data

Inactive Publication Date: 2014-03-19
ZHONGBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] In order to solve the problem that the existing liquid holdup measurement is not suitable for the measurement of the rotating packed bed, the present invention provides a method and device for online measurement of the liquid holdup of the rotating packed bed by the conductivity method

Method used

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  • Method and device for online measurement of liquid holdup of rotating packed bed
  • Method and device for online measurement of liquid holdup of rotating packed bed
  • Method and device for online measurement of liquid holdup of rotating packed bed

Examples

Experimental program
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Effect test

Embodiment 1

[0039] The water flow rate is fixed at 50L / h, pumped into the rotating packing bed, sprayed evenly onto the inner surface of the packing through the liquid distributor, the rotor rotates at a speed of 100rpm, and the air flows at a gas flow rate of 1m 3 / h is sent into the rotary packing bed by the air compressor, and the inner and outer sides of the packing are equipped with cylindrical copper mesh electrodes. The online measurement of the data acquisition system obtained an average resistance value of 13178.97Ω. From the corresponding curve of the standard solution resistance value and the solution volume, the liquid holding capacity in the filler was 71mL, and the liquid holding capacity of the rotating packed bed was calculated to be 5.17%.

Embodiment 2

[0041] The water flow rate is fixed at 250L / h, pumped into the rotating packing bed, sprayed evenly onto the inner surface of the packing through the liquid distributor, the rotor rotates at a speed of 2900rpm, and the air flows at a gas flow rate of 5m 3 / h is sent into the rotary packing bed by the air compressor, iron orifice plate electrodes are installed on the inside and outside of the packing, the electrodes are connected with electric wires, and the wires pass through the hollow shaft to transmit the electrical signal to the outside of the rotating packing bed through the mercury slip ring, and are collected by the data The average current value obtained by the online measurement of the system is 0.0010828A. From the corresponding curve of the standard solution resistance value and the solution volume, the liquid holding capacity in the packing can be obtained as 122mL, and the liquid holding capacity of the rotating packed bed can be calculated as 8.88%.

Embodiment 3

[0043] The water flow rate is fixed at 150L / h, pumped into the rotating packing bed, sprayed evenly onto the inner surface of the packing through the liquid distributor, the rotor rotates at a speed of 840rpm, and the air flows at a gas flow rate of 10m 3 / h is sent into the rotating packing bed by the air compressor, and the inner and outer sides of the packing are equipped with silver mesh electrodes, which are connected with electric wires, and the wires pass through the hollow rotating shaft to transmit the electrical signal to the outside of the rotating packing bed through the mercury slip ring, and are collected by the data The average voltage value obtained by the online measurement of the system is 6.8201V. From the corresponding curve of the standard solution resistance value and the solution volume, the liquid holding capacity in the packing can be obtained as 102mL, and the liquid holding capacity of the rotating packed bed can be calculated as 7.43%.

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Abstract

The invention relates to a method and a device for the online measurement of the liquid holdup of a rotating packed bed, belonging to the technical field of the online measurement of the liquid holdup. The invention solves the problem that the existing liquid holdup measurement method is not suitable for the measurement of the liquid holdup of the rotating packed bed. The device comprises an electrode, wherein the electrode is arranged on the non-conductive packing of the rotating packed bed. The electrode is connected with a slip ring through a conducting wire. The slip ring and a rotating shaft rotate synchronously. The slip ring is connected with a data acquisition system. The steps of the method comprise that gas and liquid with fixed flow are injected into the rotating packed bed, the slip ring transmits electrical signals to the outside, the electric signal data is acquired and solution volume corresponding to the resistance of standard solution is compared. The invention realizes the online measurement of the liquid holdup and has the advantages of that the real-time performance is high, the continuity is good, the detailed features of the liquid holdup can be comprehensively reflected and the like; the method and the device can be directly used for the measurement of local liquid holdup; and by adopting the conductance method, not only the error caused by the weight method and the volumetric method is overcome, but also the online measurement can facilitate the detection of the impacts of all kinds of impact factors of the liquid holdup on the liquid holdup.

Description

technical field [0001] The invention belongs to the technical field of online liquid holdup measurement, in particular to a method and device for online liquid holdup measurement of a rotating packed bed. Background technique [0002] The rotating packed bed is also known as the supergravity machine, and the English name is Rotating Packed Bed (RPB), or HIGEE. It is mainly composed of six parts: housing, rotor, sealing device, liquid distributor, transmission shaft and motor. The rotor is the core part of the rotating packing bed, its main function is to load and fix the packing and drive the packing to rotate at high speed. The rotor consists of upper and lower discs and inner and outer cylindrical drum walls, and is mainly used for transfer and reaction processes. [0003] Liquid holdup is one of the main parameters reflecting the hydrodynamics of the packing layer, which is composed of dynamic liquid holdup and static holdup liquid. For a rotating packed bed, the ratio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/06G01N27/07
Inventor 焦纬洲刘有智周莉骅申红艳祁贵生袁志国
Owner ZHONGBEI UNIV