Device and method for measuring solution desorption heat by internal heat synchronous heat tracing method

Abstract

The invention provides a device for testing heat absorption and desorption of a solution by using an internal heating type synchronous thermal tracking method and testing method and belongs to the technical field of heat absorption and desorption testing. The device comprises an inner tube solution heating system, an outer tube automatic synchronous thermal tracking system, a gas outlet pipeline system and a data acquisition control system. A heating body is adopted to heat inside a solution, and at the same time the solution is stirred, so that the mass transfer property of the solution is improved, a solution gas desorption reaction is carried out, and a rapid and uniform solution temperature field is achieved. A relay is controlled by using a temperature difference thermal coupling, furthermore an outer heating piece and a heating wire circuit are controlled to be powered on and off, and the temperatures of an outer tube and the inner wall of an inner tube and the temperature of thesolution are always synchronously tracked. Moreover, measures such as vacuuming, heat-preservation layer addition, reflection layer addition and the like are taken additionally between the inner tubeand the outer tube, so that rapid heating of the outer heating piece is ensured, the temperature difference of the solution and the outer tube is reduced, and heat radiation of the solution is reduced. The device is simple in structure, convenient to operate, possible in automatic temperature control in the testing process, and high in control precision.

Description

technical field [0001] The invention relates to the technical field of desorption heat measurement, in particular to a device and a measurement method for measuring the heat of reaction of a solution by an internal heating type synchronous heat tracing method. Background technique [0002] Currently widely used gas separation methods include: absorption method, adsorption method, membrane separation method and cryogenic separation method. The absorption method refers to the method of absorbing gas with a solution to capture gas, including physical absorption and chemical absorption. The physical absorption method refers to the absorption process in which the gas is dissolved in the absorption liquid, but does not chemically react with the physical absorbent. The physical absorption method achieves the absorption and desorption of the gas by changing the temperature and pressure between the absorption liquid and the gas. The method is suitable for the situation where the par...

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Problems solved by technology

However, the desorption process requires the removal of gas, and the chemical reagents are all corrosive solutions, and the traditional direct calorimetry, differential scanning calorimetry and cooling methods cannot achieve this process

For example, in the actual operation of direct calorimetry, the measurement cycle is long and the amount of solution used is large. When the hot solution heated to a certain temperature is poured, part of the heat will be lost to the surrounding environment; the sample used in differential scanning calorimetry is too small to be sealed. ; The process of pouring the high-temperature liquid to be tested by the cooling method will dissipate heat, and the heat-insulated container will also dissipate heat to a certain extent. The operation is complicated and the usage is large.

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