Static induction space filter measuring method for gas-solid two phase tube flow particle speed

Abstract

Using single circular ring type static sensor, the invention implement measures average velocity of grains, simplifies measuring device, and reducing dependence of flow condition between two phases of gas and solid. Belonging to non-contact type, the static sensor does not influence on flow condition of liquid in structure. Based on spatial filtering method of static sensor, the technique for measuring average velocity of grains possesses features of simple structure, convenience of processing signal, low cost, and high measuring accuracy. The invention is applicable to site environment of inclement industrial pneumatic transport. The invention carries out experimental study systematically on experimental installation of gravity handling grain flow, and compressive dense phase pneumatic transport system. The result indicates that the measuring system possesses good repeatability and stability.

Description

technical field

[0001] The invention utilizes the space filtering effect of a ring-shaped electrostatic sensor to measure the particle average velocity of a gas-solid two-phase pipe flow, and relates to an electrostatic induction space filter measurement method for the particle velocity of a gas-solid two-phase pipe flow. Background technique

[0002] The measurement of particle velocity is of great significance for understanding the internal state of the flow and for the measurement, energy saving and control of the production process. At present, there are a variety of particle flow velocity measurement methods, such as Doppler, cross-correlation, tracer method, etc., and these methods have their own characteristics and scope of application. The two-phase flow velocity measurement system based on related technology has a wide measurement range, strong adaptability, and does not hinder the flow. It can realize non-contact measurement of particles, but the velocity measureme...

Examples

Embodiment Construction

[0023] An electrostatic induction space filter measurement method of particle velocity in a gas-solid two-phase pipe flow, using an electrostatic sensor including a measuring probe and a preamplifier, the steps are as follows:

[0024] Step 1) At the radial position r, when the derivative of the power spectrum characteristic of the output signal of the electrostatic sensor is zero, there is:

[0025] a b exp ( - ( πf ) 2 b v 2 ) · ( 1 - 2 ( πf ) 2 ...

technical field

[0001] The invention utilizes the space filtering effect of a ring-shaped electrostatic sensor to measure the particle average velocity of a gas-solid two-phase pipe flow, and relates to an electrostatic induction space filter measurement method for the particle velocity of a gas-solid two-phase pipe flow. Background technique

[0002] The measurement of particle velocity is of great significance for understanding the internal state of the flow and for the measurement, energy saving and control of the production process. At present, there are a variety of particle flow velocity measurement methods, such as Doppler, cross-correlation, tracer method, etc., and these methods have their own characteristics and scope of application. The two-phase flow velocity measurement system based on related technology has a wide measurement range, strong adaptability, and does not hinder the flow. It can realize non-contact measurement of particles, but the velocity measureme...

Examples

Embodiment Construction

[0023] An electrostatic induction space filter measurement method of particle velocity in a gas-solid two-phase pipe flow, using an electrostatic sensor including a measuring probe and a preamplifier, the steps are as follows:

[0024] Step 1) At the radial position r, when the derivative of the power spectrum characteristic of the output signal of the electrostatic sensor is zero, there is:

[0025] a b exp ( - ( πf ) 2 b v 2 ) · ( 1 - 2 ( πf ) 2 ...

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