Device for testing absorption heat of solution by adopting synchronous heat tracing method and testing method

Abstract

The invention provides a device for testing absorption heat of a solution by adopting a synchronous heat tracing method and a testing method, and belongs to the technical field of tests on the absorption heat through chemical reaction. The device comprises an inner tube solution reaction heat production system, an outer tube automatic synchronous heat tracing system, an air inlet pipeline system, an air outlet pipeline system and a data acquisition control system. A magnetic stirring bar is placed at the bottom of the solution; a cellular porous material is mounted at an air inlet pipe mouth; by means of stirring, the reaction is carried out more fully, and a temperature field of the solution is quick and uniform. By utilizing temperature difference thermal couple, a relay is controlled, so that connection/disconnection of a circuit of a heating sheet is controlled, and synchronous tracking on temperature of an outer tube and temperature of the solution is always performed. Additionally with measures such as vacuumization, additional arrangement of a heat insulating layer and additional arrangement of a reflecting layer are taken on the outer side of the heating sheet, heat dissipation of the heating sheet is reduced. The device has a simple structure and is convenient to operate; in a testing process, temperature control can be automatically carried out, and the control accuracy is high.

Description

technical field [0001] The invention relates to the technical field of chemical reaction absorption heat measurement, in particular to a device and a measurement method for measuring solution absorption heat by a 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 partial pressure o...

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Problems solved by technology

However, the absorption process requires ventilation, 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 period is long and the sample volume 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 amount of solution used in differential scanning calorimetry is too small to be Sealing; 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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