Ore pulp calibration device

Abstract

The invention discloses an ore pulp calibration device, belongs to the technical field of ore pulp measurement and fluid measurement calibration. The ore pulp calibration device provided by the invention can measure the volume of ore pulp flowing into the ore pulp calibration device in a unit time, calculate the mass of the ore pulp in any period of time in the unit time by a densimeter on an orefeeding pipeline, and can control the unit time at 1% after calculation by the method; a calculation operation mode adopted by the device of the invention can overcome difficulties caused by high costs and high maintenance costs of on-site mounting and measuring instruments, facilitates rapid on-site calculation and recycling, can also ensure accuracy and authenticity of measurement, and reduces influences on other processes.

Description

technical field [0001] The invention belongs to the technical field of pulp metering and fluid metering calibration, and in particular relates to a pulp calibration device. Background technique [0002] At present, the flowmeter is mainly used for rapid measurement of ore pulp. The flowmeter is mainly an ultrasonic flowmeter. According to the measurement principle, it can be divided into time-difference type and Doppler type. It is designed based on the principle of the geometric sum of the average flow velocity of the measured medium and the velocity of the sound wave itself. It also reflects the flow rate by measuring the flow rate. The time-difference ultrasonic flowmeter manufactured by using the time-difference principle has been widely concerned and used in recent years, and it is the most widely used ultrasonic flowmeter in enterprises and institutions. Ultrasonic Doppler flowmeters manufactured using the Doppler effect are mostly used to measure medium with certain...

AI Technical Summary

Problems solved by technology

Ultrasonic Doppler flowmeters manufactured using the Doppler effect are mostly used to measure medium with certain suspended particles or air bubbles. The use has certain limitations, but it solves the problem that the transit-time ultrasonic flowmeter can only measure a single clear fluid. , is also considered an ideal instrument for non-contact measurement of two-phase flow

The ultrasonic flowmeter currently used has the following defects: 1) The temperature measurement range of the ultrasonic flowmeter is not high, and generally it can only measure fluids with a temperature lower than 200°C, and the anti-interference ability is poor; 2) It is susceptible to air bubbles, scaling, pumps and Ultrasonic noise mixed in from other sound sources interferes and affects measurement accuracy; 3) The straight pipe section is strictly required to be 20D in the front and 5D in the rear, otherwise the dispersion will be poor and the measurement accuracy will be low; 4) The uncertainty of installation will bring relatively high Large error; 5) The scale of the measuring pipeline will seriously affect the measurement accuracy and bring significant measurement errors. Even in severe cases, the instrument has no flow display, and the reliability and accuracy levels are not high (generally about 1.5 to 2.5) , poor repeatability, and short service life (the general accuracy can only be guaranteed for one year); 6) The ultrasonic flowmeter determines the volume flow rate by measuring the fluid velocity. For liquids, its mass flow rate should be measured. It is obtained after artificially setting the density. When the fluid temperature changes, the fluid density changes. Artificially setting the density value cannot guarantee the accuracy of the mass flow rate.

This results in a very high cost, and the replacement is very inconvenient, because various problems are often encountered during the installation process on site, which brings difficulties to on-site maintenance, which is not only time-consuming and laborious, but also easily affects production, especially when When the pressure on site is high, it is not easy to repair

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