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 problem of being unsuitable for measuring the rotating packed bed, and achieve the effect of comprehensively reflecting detailed characteristics and accurate data

Inactive Publication Date: 2010-08-04
ZHONGBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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, t

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

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Effect test

Embodiment 1

[0039] The water flow rate is fixed at 50L / h, pumped into the rotating packed bed, and sprayed evenly on the inner surface of the packing through the liquid distributor. The rotor rotates at a speed of 100rpm, and the air flow rate is 1m. 3 / h is sent to the rotating packed bed by an air compressor. The inner and outer sides of the packing are equipped with cylindrical copper wire mesh electrodes. The electrodes are connected with electric wires. The electric signals are transmitted to the outside of the rotating packed bed through the mercury slip ring through the hollow rotating shaft. The online measurement of the data acquisition system obtained an average resistance value of 13178.97Ω. From the corresponding curve of the resistance value of the standard solution and the solution volume, the liquid holding capacity in the packing was 71 mL, and the liquid holding capacity in 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 packed bed, and sprayed evenly on the inner surface of the packing through a liquid distributor. The rotor rotates at 2900rpm, and the air flows at a gas flow rate of 5m. 3 / h is sent to the rotating packed bed by an air compressor. The inner and outer sides of the packing are equipped with iron perforated electrodes. The electrodes are connected with electrical wires. The wires transmit electrical signals to the outside of the rotating packed bed through a mercury slip ring through a hollow shaft. Data is collected The online measurement of the system obtains an average current value of 0.0010828A. From the corresponding curve of the resistance value of the standard solution and the amount of the solution, the liquid holding capacity in the packing is 122 mL, and the liquid holding capacity in the rotating packed bed is calculated to be 8.88%.

Embodiment 3

[0043] The water flow is fixed at 150L / h, pumped into the rotating packed bed, sprayed evenly on the inner surface of the packing through the liquid distributor, the rotor rotates at 840rpm, and the air flows at a gas flow of 10m 3 / h is sent to the rotating packed bed by an air compressor, the inner and outer sides of the packing are equipped with silver wire mesh electrodes, and the electrodes are connected with electric wires. The wires transmit electrical signals to the outside of the rotating packed bed through the mercury slip ring through the hollow shaft, and the data is collected The online measurement of the system obtains an average voltage value of 6.8201V. From the corresponding curve of the resistance value of the standard solution and the amount of the solution, the liquid holding capacity in the packing is 102 mL, and the liquid holding capacity in the rotating packed bed is calculated to be 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 measurement of liquid holding capacity, and in particular relates to a method and device for online measurement of liquid holding capacity of a rotating packed bed. Background technique [0002] Rotating packed bed is also known as supergravity machine, and its English name is Rotating Packed Bed (RPB), or HIGEE. It is mainly composed of six parts: shell, rotor, sealing device, liquid distributor, drive shaft and motor. The rotor is the core part of the rotating packed bed. Its main function is to load and fix the packing and drive the packing to rotate at a high speed. The rotor is composed of two upper and lower discs and two cylindrical drum walls inside and outside, and is mainly used for transmission and reaction processes. [0003] Liquid holding capacity is one of the main parameters reflecting the fluid mechanics of the packing layer, which is composed of two parts: dynamic holding capacity and ...

Claims

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Application Information

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IPC IPC(8): G01N27/06G01N27/07
Inventor 刘有智焦纬洲周莉骅申红艳
Owner ZHONGBEI UNIV
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