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Detection method for transmission flow pattern during pneumatic transmission process

A technology of pneumatic conveying and detection methods, which is applied in the direction of measuring devices, processing detection response signals, and using acoustic wave emission technology for material analysis, etc., to achieve the goals of improving measurement accuracy, spatial resolution, reliability and detectability Effect

Active Publication Date: 2019-01-29
ZHEJIANG UNIV
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  • Application Information

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Problems solved by technology

However, static electricity does not necessarily exist in all gas-solid two-phase flow conveying systems, which leads to great limitations in the use of the above methods

Method used

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  • Detection method for transmission flow pattern during pneumatic transmission process
  • Detection method for transmission flow pattern during pneumatic transmission process
  • Detection method for transmission flow pattern during pneumatic transmission process

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Embodiment 1

[0038] like figure 1 As shown, the detection device of this embodiment includes a horizontal material conveying pipeline 1, a group of acoustic wave sensor groups 2, a signal amplification device 3, a signal acquisition device 4, and a signal processing device 5; The sensor group 2 is connected to the signal amplifying device 3 to convert the acoustic signal into an electrical signal and transmit it to the signal amplifying device 3, and the signal amplifying device 3 is connected to the signal collecting device 4 to transmit the amplified signal to the signal collecting device 4, and the signal collecting device 4 and The signal processing device 5 is connected to analyze the collected signals.

[0039] like figure 2 As shown, in this embodiment, the acoustic wave sensor group 2 includes four acoustic wave sensors, the four acoustic wave sensors are respectively 211, 212, 213 and 214, which are evenly distributed along the same circular section of the pipeline 1, and the in...

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Abstract

The invention discloses a detection method for the transmission flow pattern during a pneumatic transmission process. The transmission flow pattern of a material in a pipeline is accurately recognizedby means of a sound wave signal generated by collisions of fluid particles and friction with a pipeline wall in a noninvasive collection pipeline. The sound wave detection belongs to a noninvasive detection method, wherein a detection device is simple, safe and environment-friendly, so that the detection method is suitable for online detection during industrial production. By means of a sound wave sensor array, the flow pattern is determined accurately by effectively utilizing the characteristic relationship between the flow pattern and particle concentration distribution through data fusionof the sensors, so that the method, compared with a flow pattern detection technology in the prior art, is more sensitive and accurate and is easy to carry out.

Description

technical field [0001] The invention relates to a method for detecting conveying parameters in the process of pneumatic conveying. Background technique [0002] Pneumatic conveying is a typical gas-solid two-phase flow operation process to transport solid particles through the action of gas, and is widely used in chemical, metallurgical, pharmaceutical and other production processes. How to reduce the energy loss (pressure drop) in the process of pneumatic conveying and realize the maximum utilization of energy is the main problem faced by this process. Zenz et al. (Industrial&EngineeringChemistry, 1949, 41(12):2801-2806) found that in the process of pneumatic conveying, at a certain fixed mass flow rate, there is a minimum value of pipeline pressure drop with the change of gas velocity, and the minimum The gas velocity corresponding to the pressure drop point is called the minimum delivery velocity. In recent years, the dense-phase conveying technology whose conveying gas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N29/14G01N29/44
CPCG01N29/14G01N29/449G01N2291/02408
Inventor 杨遥张鹏孙婧元田思航黄正梁王靖岱蒋斌波廖祖维叶健阳永荣王超林王旻
Owner ZHEJIANG UNIV
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