Parameter detection method and monitoring device for mine filling slurry

Abstract

A mine filling slurry parameter monitoring device, comprising an arc-shaped transmitting seat and an arc-shaped receiving seat arranged on the outside of a slurry delivery pipeline; the transmitting seat is provided with an ultrasonic transmitting transducer; the receiving seat is provided with an ultrasonic receiving transducer; The seat and the receiving seat are offset along the axis of the slurry pipeline; the ultrasonic transmitting transducer, the ultrasonic receiving transducer and the temperature sensor are connected to the signal processing computing center and the control display module through the signal transmission module. The mine filling slurry parameter detection method and monitoring device of the present invention use ultrasonic transmitting transducers and receiving transducers paired in different modes to circularly detect parameters such as slurry temperature, concentration and flow rate of different layers, and prepare slurry and pipeline transportation to provide real-time monitoring signals, single-machine measurement and display, output slurry concentration, flow velocity parameters, monitor the concentration distribution and flow velocity distribution in the pipe, and give early warning of pipe plugging accidents.

Description

Technical field [0001] The invention relates to the technical field of pipeline transportation and slurry preparation in mine filling and beneficiation, and in particular to a method and a monitoring device for detecting the parameters of mine filling slurry. Background technique [0002] The pipeline transportation concentration and flow monitoring technology of solid-liquid two-phase flow is widely used in mine filling, processing plant tailings discharge, coal water slurry transportation, power plant fly ash discharge and other fields, which are directly related to the slurry quality, transportation effect, and transportation Ability is a key indicator of system design, industrial control, and technology management. At present, slurry concentration and flow monitoring mainly include the following methods and equipment: 1) The manual pot method calculates according to the volume composition of various materials and the slurry density, which is time-consuming and time-consuming,...

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Problems solved by technology

At present, there are mainly the following methods and equipment in the monitoring of slurry concentration and flow rate: 1) The manual pot method calculates the volume composition and slurry density of various materials, which is labor-intensive and time-consuming, cannot realize online monitoring, and cannot give control signals ;2) The nucleon concentration meter is made of the principle of γ-ray attenuation, which can realize on-line monitoring and control signal output, but has a single function and has certain radiation pollution. It needs strict safety certificates and regular inspections during use, and the cost is high. Once lost The consequences are unimaginable; 3) The ultrasonic concentration meter is made of the principle of time shift, frequency shift or sound attenuation when the ultrasonic wave propagates in the measured body. Most of them are monophonic structures and cannot monitor the concentration of the slurry along the pipe diameter. 4) Electromagnetic flowmeter, based on Faraday’s electromagnetic induction principle, requires a uniform distribution of the magnetic field and a symmetrical distribution of the fluid flow rate, which is affected by the electromagnetic flow of mechanical equipment. The impact is great, and it cannot be applied in principle when the slurry has segregated settlement and turbulent flow; 5) Ultrasonic flowmeters are made based on the principle of penetrating, transmitting, and receiving ultrasonic frequency shift or sound attenuation, and most of them are monophonic The single-directional test structure cannot monitor the flow distribution of the slurry along the pipe diameter, nor can it predict the slurry segregation and blockage

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