Method and device for measuring flow speed of dense paste based on electromagnetic signal cross correlation

Abstract

The invention relates to a method and device for measuring the flow speed of a dense paste based on electromagnetic signal cross correlation. The device comprises a test tube section, a primary instrument and a secondary instrument. When the dense paste flows through a field coil 1 or 2 during pipeline conveyance, a current carrier of the dense paste performs movements of cutting magnetic induction lines in an applied magnetic field, and an electromotive force vertical to the flowing direction of the dense paste is formed; electromotive force signals in the two field coils are guided out by an electrode to be acquired, processed and analyzed; and the delay time of the two field coils is calculated by a cross correlation analysis method of two measuring points, and the quotient of the separation distance and the delay time of the two field coils is the flow speed of the dense paste. The method and the device solve the difficult problem that a special measuring device and a special measuring method for measuring the flow speed of the dense paste on a project site are not provided, and a condition for monitoring the condition of the project site and accurately controlling the flow of the dense paste is provided.

Description

Technical field [0001] The invention relates to a flow measurement method in the field of dense paste pipeline transportation, in particular to a method and device for measuring the flow velocity of dense paste based on the cross-correlation of electromagnetic signals. Background technique [0002] High-concentration viscous solid waste refers to solid-liquid two-phase waste or by-products with high solid content, high viscosity, and fine particles generated during industrial production and municipal sewage treatment. The solid content is generally mechanical solid-liquid in the industry The maximum value after separation is generally not fluid under normal temperature and pressure, and appears as a "non-sedimentation like homogeneous thick paste" during high-pressure pipeline transportation, so it is also called a thick paste. Including primary coal sludge in the coal industry, dehydrated sludge in the water supply and drainage industry, industrial sludge in the manufacturing in...

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Problems solved by technology

[0007] The patent number is ZL 2011 1 0270135.6, and the invention patent "A Device and Method for Measuring the Velocity of a Dense Paste Pipeline" was issued on October 31, 2012. block, using the time difference method of the tracer magnetic block passing through the two coils to measure the flow velocity and flow parameters in the pipeline transportation of dense paste. In industrial sites, it is difficult to place tracers, and the data cannot be continuously measured and displayed in real time

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