Device and method for measuring concentration of particulate matter in gas-solid mixture

Abstract

The invention discloses a device and a method for measuring the concentration of particulate matter in a gas-solid mixture. The device comprises a weighing device, a first bubbling device, a second bubbling device, a spring tension device and a weight compensating device, wherein the weighing device adopts a lever structure, and a weight bearing rod and a measurement rod are arranged on two sides of the lever structure respectively; the first bubbling device and the second bubbling device are arranged on the weight bearing rod and the measurement rod respectively; the weight compensating device is arranged on the measurement rod; the first bubbling device and the second bubbling device are sealed containers containing liquids, a first gas inlet pipe and a first gas outlet pipe are arranged on the first bubbling device, and a second gas inlet pipe and a second gas outlet pipe are arranged on the second bubbling device. The device has the advantages as follows: firstly, the measurement device is simple and free from influence of physical properties of the particulate matter, and the operation time is shortened by increasing the number of aeration heads; secondly, the mass cumulant of solid particles is amplified into remarkable stress changes of the spring tension device according to the minuteness amplification principle.

Description

technical field [0001] The invention relates to the technical field of multiphase flow measurement, in particular to a measuring device and a measuring method for particle concentration in a gas-solid mixture. Background technique [0002] The main methods for measuring the concentration of solid particles in low-concentration gas-solid mixtures include membrane weighing method, β-ray absorption method, differential pressure crystal difference frequency method, microbalance oscillation method, blackness method, and turbidity method. [0003] (1) Filter membrane weighing method: extract a certain amount of dust-containing gas according to the principle of constant velocity sampling of particulate matter, and calculate the concentration of particulate matter in the exhaust gas according to the amount of particulate matter captured on the filter cartridge of the sampling tube and the amount of gas extracted at the same time . The principle of this method is simple, the measure...

AI Technical Summary

Problems solved by technology

[0008] (6) Turbidity method: When used for concentration measurement, the particle size distribution or average particle size of the measured object must be known in advance, which has certain limitations, that is, when the concentration is extremely low, the light intensity does not change much, and when the concentration is extremely high , the light intensity attenuation is too large, so the signal-to-noise ratio is greatly reduced. Therefore, in this special case, the effect is poor; when the smoke composition changes, the measurement results will also appear deviations; Separate installation is required, so strict alignment is required; smoke and dust attached to optical lenses such as reflectors will also affect the measurement results

Images