Device and method for measuring gas-solid diphasic stream parameter in square pneumatic conveying pipe
A technology of pneumatic conveying pipeline and measurement method, which is applied in the direction of volume flow measurement device, measurement device, liquid/fluid solid measurement, etc., to achieve the effect of speeding up the progress of the project
Inactive Publication Date: 2010-01-20
TSINGHUA UNIV
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[0003] At present, many gas-solid two-phase flow measurement methods have been produced, but because there is no accurate theoretical model that can fully explain the flow change law of gas-solid two-phase flow, these methods have certain limitations
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[0019] The invention provides a device and method for measuring gas-solid two-phase flow parameters in a square pneumatic conveying pipeline. exist figure 1 In the schematic diagram of the electrostatic sensing and measuring device applied to the square pneumatic conveying pipeline shown, the electrostatic sensor 2 is installed on the square conveying pipeline 1, the electrostatic sensor 2 and the front-end charge amplifier 3, the signal processing circuit 4, the data acquisition card 5 and the computer 6 in series. figure 2 (a) shows a schematic diagram of installing the square electrode of the electrostatic sensor 2 on the outer wall of the square pipeline, and the insulating layer 8, the electrostatic sensor 2, the insulating layer 8 and the shielding layer 9 are fixed sequentially on the outer wall of the pipeline; figure 2 (b) is a schematic diagram of installing the square electrode of the electrostatic sensor 2 on the inner wall of the square pipeline, and the square...
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The invention discloses a measuring device and the method for measuring the two-phase flow parameter of gas and solid in square pneumatic conveying pipeline, belonging to the measurement technology of two-phase flow parameter of gas and solid in conveying pipeline. The measuring device is that an electrostatic sensor, and a charge preamplifier before the electrostatic sensor, a signal process circuit, a dada acquisition card, and a computer are arranged on the square conveying pipeline in series. The measuring method is as follows: the quantity of electricity of the static charges carried on the solid particles in the square pipeline when passing through the square electrode is represented with the electrostatic sensor through electrostatic induction; the weak inductive charges on the electrode are pretreated with the charge preamplifier, and then is input in the computer via the signal process circuit and the dada acquisition card; the sampling signal is analyzed and processed to obtain the corresponding phase flow parameter of gas and solid in square pipeline, so as to realize the measurement to the phase flow parameter of gas and solid in square pneumatic conveying pipeline.
Description
technical field [0001] The invention belongs to the technical scope of measuring gas-solid two-phase flow parameters in a conveying pipeline, and in particular relates to a measuring device and method for gas-solid two-phase flow parameters in a square pneumatic conveying pipeline. Background technique [0002] Gas-solid two-phase flow commonly exists in natural phenomena, and involves many fields of national production, and is closely related to industrial and agricultural production. Because the pipeline transportation of solid materials has the advantages of high transportation efficiency, avoiding environmental impact, and increasing safety, it has become the most closely related application of gas-solid two-phase flow to industrial and agricultural production, and is widely used in coal powder in thermal power generation Pipeline transportation of flour in food industry, pipeline transportation of traditional Chinese medicine in pharmaceutical manufacturing, pipeline tr...
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IPC IPC(8): G01F1/74G01F7/00G01F15/08G01R29/12
Inventor 彭黎辉张岩陆耿阎勇
Owner TSINGHUA UNIV