Device and method for detecting equilibrium solubility of acid gas in alkalinity absorption liquid

Abstract

The invention discloses a device for testing solubility of weak acid gas in an alkalinity absorption liquid, and belongs to the fields like gas absorption and separation and petrochemical industry, and the device is suitable for detesting an equilibrium solubility curve of the weak acid gas under different gas partial pressures and different temperatures. The device is composed of a gas transmission system, a reaction tank, a temperature control system, a sampling system, a gas partial pressure measuring system, a liquid sample analytic system and a gas volume measuring system, wherein the stainless steel reaction tank can increase the measurement range of the gas partial pressure, gas and liquid respectively control temperature so that the temperature is uniform and the use of a magnetic stirrer becomes possible, an intelligent instrument is utilized to carry out temperature control with high precision and pressure display, an acid hydrolysis method is adopted to analyze a liquid sample so as to obtain the solubility, the gas is utilized to blow down the liquid remained at the pipeline in the last experiment and the precision is improved, a eudiometer is adopted as a tool for measuring the gas volume, the measuring precision of the gas volume is guaranteed, the experimental result is more stable and reliable. The device provided by the invention has the advantages that the property is stable and reliable, and the device is simple and convenient.

Description

[0001] technical field [0002] The invention belongs to the fields of gas absorption and separation, petrochemical industry, waste gas treatment and the like, and is mainly used for measuring the equilibrium solubility of weakly acidic gas in an alkaline solution under different gas partial pressures and different absorption temperatures. Background technique [0003] In the gas separation industry and the petrochemical industry, absorption is one of the most commonly used methods for separating gases. The principle is to achieve gas separation according to the different solubility of different gases in the absorption liquid. Therefore, the equilibrium solubility of the weakly acidic gas in the absorption liquid becomes an essential parameter when designing the separation device and the separation process. However, currently there are There are more or less problems in the devices for measuring the solubility of weakly acidic gases in alkaline absorption liquids. [0004] ...

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Problems solved by technology

[0006] The purpose of the present invention is to solve problems such as the control of absorption temperature, the selection of stirring mode, the difficulty of sampling and analysis, the measurement range of the absorption device, the method of analyzing solubility, etc., and the design is more convenient and accurate to measure the weak acid gas in the alkaline absorption liquid. The Equilibrium Solubility Test Apparatus

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