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Gas-solid multiphase flow online measurement device and method based on arc-shaped electrostatic electrode arrays

An electrode array and measuring device technology, applied in the field of gas-solid multiphase flow on-line measuring devices based on arc-shaped electrostatic electrode arrays, can solve the problems of unsuitability for industrial applications, electrode wear, interference with solid-phase powder flow, etc. The effect of light weight, less maintenance work and simple construction

Active Publication Date: 2015-01-28
BEIJING ENLANDAR TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Electrostatic measuring devices using intrusive electrodes may cause problems such as electrode wear, interference with solid phase powder flow, and production safety, and are not suitable for industrial applications

Method used

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  • Gas-solid multiphase flow online measurement device and method based on arc-shaped electrostatic electrode arrays
  • Gas-solid multiphase flow online measurement device and method based on arc-shaped electrostatic electrode arrays
  • Gas-solid multiphase flow online measurement device and method based on arc-shaped electrostatic electrode arrays

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Embodiment 1

[0028] This embodiment provides an online measurement device for gas-solid multiphase flow based on an arc-shaped electrostatic electrode array (1). figure 1 It is a schematic structural diagram of an online gas-solid multiphase flow measurement device based on an arc-shaped electrostatic electrode array (1) provided by an embodiment of the present invention. Depend on figure 1 It can be seen that:

[0029] The gas-solid multiphase flow online measurement device based on the arc-shaped electrostatic electrode array (1) provided in this embodiment includes an arc-shaped electrostatic electrode array (1), an embedded signal processing unit (5), and a central control unit (6), etc. . A set of the first metal electrodes (2) and a set of the second metal electrodes (3) are arranged side by side on the inner peripheral surface of the arc-shaped electrostatic electrode array (1). The first metal electrode (2) and the second metal electrode (3) are arc-shaped, and the openin...

Embodiment 2

[0040] This embodiment provides an online measurement method for gas-solid multiphase flow based on an arc-shaped electrostatic electrode array, which mainly includes the following steps:

[0041] Step 1. The arc-shaped electrostatic electrode array (1) acquires the electrostatic fluctuation signal caused by the local solid phase powder flow;

[0042] Step 2. The embedded signal processing unit (5) is connected to the arc-shaped electrostatic electrode array (1) through a shielded cable, and the input electrostatic signal is converted into a voltage signal through a resistance / capacitance network, amplified and filtered before conversion is a digital signal;

[0043] Step 3. The embedded signal processing unit (5) uses the time-domain and frequency-domain characteristics of the measurement signal of the first metal electrode (2) to analyze to identify the solid-phase powder flow pattern, and at the same time uses multi-channel cross-correlation calculations to obtain m...

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Abstract

The invention provides a gas-solid multiphase flow online measurement device and method based on arc-shaped electrostatic electrode arrays in the field of industrial gas-solid multiphase flow tests. The measurement device comprises the arc-shaped electrostatic electrode arrays, a first metal electrode set and a second metal electrode set are sequentially arranged in the inner circumferential face of each arc-shaped electrostatic electrode array side by side, first metal electrodes and second metal electrodes are each in the shape of an arc, and the axial width of each first metal electrode is smaller than that of each second metal electrode. The invention further relates to the measurement method based on the measurement device. According to the method, the speed and the flowing stability of solid phase powder are measured through the high sensitivity of the first metal electrodes and the bandwidth, and the solid phase power mass flow rate is measured through the large sensitive areas of the second metal electrodes and the space filtering effect. The device and method have the advantages that on-site implementation is convenient, measurement is accurate and reliable, the measurable range is large, the using time is long, and maintenance is convenient, and the device and method can be widely applied to continuous online monitoring of industrial pneumatic solid phase powder conveying.

Description

Technical field [0001] The invention belongs to the technical scope of gas-solid two-phase flow testing, and in particular relates to an online measurement device and method for gas-solid multiphase flow based on an arc-shaped electrostatic electrode array. Background technique [0002] Gas-solid multiphase flow widely exists in important industrial production processes such as pneumatic conveying pipelines, solid-solid fluidized beds, and exhaust emissions. The movement of solid phase powder driven by flowing gas is of great significance to optimize the production process, improve production efficiency and ensure safe production. Traditional single-phase fluid measurement methods based on stress and throttling methods are not suitable for the measurement of industrial gas-solid two-phase or multiphase flow. Capacitance, optics, radiation, heat conduction, digital imaging and acoustic technologies are easily affected by the properties of solid phase powder and environmental...

Claims

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Application Information

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IPC IPC(8): G01D21/02G01D5/12
Inventor 钱相臣黄孝彬胡永辉闫勇
Owner BEIJING ENLANDAR TECH
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