Strong corrosivity medium phase interface measurement method

Abstract

The invention relates to a phase interface measuring method. The method comprises the following steps: pressure liquid is pressed into a phase to be measured from an upper pressure opening and a lower pressure opening at the same flow, pressure of the pressure openings is measured, and phase interface height h (h=(deltaP-rho1*g*H) / (rho2-rho1) / g) is computed according to pressure difference deltaP between the upper pressure opening and the lower pressure opening, the height H of the upper pressure opening as well as upper phase density rho1 and lower phase density rho2 of two phases in the phase to be measured. In the measuring method, a common instrument can measure the phase interface height of highly corrosive media, which has the advantages of low cost, simple measuring method and wide application; and the measuring method can be used for measuring liquid level, the phase interface height between media with similar density and each phase interface height of a multi-phase mixture besides being especially suitable for measuring the phase interface height of the highly corrosive media.

Description

technical field [0001] The invention relates to a method for measuring a phase interface, in particular to a method for measuring a phase interface of a strong corrosive medium. Background technique [0002] In the chemical reaction, there is inevitably a separation process of two-phase or multi-phase media in the system. To realize the continuous, long-term and normal operation of the chemical process, the height of the phase interface in the equipment can be directly and accurately judged, especially The height of the phase interface is especially important in the presence of strong corrosive media. [0003] However, in the environment of strong corrosive media, such as hydrofluoric acid, hydrochloric acid and other media environments, if you use general instruments such as magnetic levitation liquid level gauges, differential pressure liquid level gauges, etc. to measure the position of the phase interface, it will soon be Corrosion, it is difficult to ensure long-term e...

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Problems solved by technology

[0003] However, in the environment of strong corrosive media, such as hydrofluoric acid, hydrochloric acid and other media environments, if you use general instruments such as magnetic levitation liquid level gauges, differential pressure liquid level gauges, etc. to measure the position of the phase interface, it will soon be Corrosion, it is difficult to ensure long-term effective use; if indirect liquid level gauges such as radar are used for measurement, the cost of the instrument is very high; in addition, if the production process needs to separate multi-phase mixtures at the same time, it is also necessary to be able to measure the multi-phase interface. Instrument or method, therefore, the object of the present invention is to provide a method with low cost, capable of measuring multiple phase interfaces at the same time, and especially suitable for phase interfaces of strong corrosive media

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