Device and method for measuring mass flow rate of solid particles in gas-solid two-phase flow

Abstract

The invention discloses a device and a method for measuring a mass flow rate of solid particles in a gas-liquid two-phase flow. According to the device and the method, a high-pressure gas bottle is used for providing fluidized gas to enter a power supplying system to carry solid powder, so as to form a gas-solid two-phase flow; the gas-solid two-phase flow enters a cyclone separator through a two-phase inlet along the tangential direction of the inner wall of a cylinder of the cyclone separator; the speed of the two-phase flow is reduced rapidly because an air pressure is reduced rapidly by the inner cavity of the cyclone separator; the solid powder slides down into a powder depositing cylinder along the inner wall of the lower end of the cyclone separator; meanwhile, the fluidized gas penetrates through a powder screening net to be discharged under the common effect of a pressure difference and an air exhauster. The mass of the powder in the powder depositing cylinder weighed by an electronic scale in real time and is transmitted to a data acquisition computer by a data line, so as to obtain the mass flow rate of the soli powder in the gas-liquid two-phase flow. According to the device and the method for measuring the mass flow rate of the solid particles in gas-liquid two-phase flow, the measurement of the mass rate of the supplied solid powder is realized; the working of the cyclone separator is stable and reliable in a measurement process and the whole measurement precision is higher.

Description

technical field [0001] The invention belongs to the technical field of measurement, and in particular relates to a device and method for measuring the mass flow rate of solid particles in a gas-solid two-phase flow. Background technique [0002] In the industrial field, the use of gas to transport pulverized coal has been widely used, but the measurement and control of the mass flow rate is relatively rough, and the time period averaging method is usually used, that is, the total amount of powder transported per unit time is divided by the time to obtain the time period The average mass flow rate in . In scientific experiments, the Coriolis flowmeter is also commonly used to measure the mass flow rate of gas-solid two-phase flow. Its principle is simple and can directly measure the mass flow rate without being affected by the temperature and pressure of the fluid. However, this instrument is only suitable for dilute phase transportation, that is, the mass ratio of solid pow...

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Problems solved by technology

The content and methods involved in the prior art and related documents are mainly based on principles, and few of them can be truly applied in industrial production and scientific experiments, and some methods are not suitable for the special properties of solid propellant powders

Moreover, in the new powder rocket engine powder supply system, the high-pressure gas source is used to directly transport the solid powder to the target high-pressure chamber. Due to the high precision requirements, it belongs to dense-phase transportation, that is, the mass ratio of solid particles in the gas-solid two-phase flow High, up to 90-95%, the mass flow rate measurement of solid powder can not be completed

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