Experimental device for evaporation, absorption and mass transferring of falling film of vertical tube

Abstract

The invention discloses an experimental device for the evaporation, absorption and heat and mass transferring of a falling film of a vertical tube, which comprises a closed and communicated circulating system consisting of basic parts of a generator, an absorber, a pressure reducing valve, a heat exchanger, a heating device and a cooling device; the circulating system is provided with a temperature measuring system, a pressure measuring system and a flow measuring system respectively so as to realize the tracking and monitoring on the condition of the temperature, the pressure and flow variation of a research working medium in the circulating system. The device has the advantages that: the closed and communicated circulating system consisting of the vertical tube generator, the vertical tube absorber, a connecting pipeline of the research working medium and the like is provided with sight glass for conveniently observing a film forming flow state; the measuring system can realize the tracking and monitoring on the condition of the temperature, the pressure and flow variation of the research working medium in the circulating system, can carry out the thermal property research and the heat and mass transferring experiment research of a plurality of working media and has compact structure, convenient operation, visualization, intuition and reliable safety performance.

Description

technical field [0001] The invention relates to a heat and mass transfer experimental device used in teaching and scientific research, in particular to an experimental device for vertical tube falling film evaporation and absorption. Background technique [0002] Falling film evaporation is one of the important teaching contents in the courses of chemical engineering and technology, metallurgical engineering, thermal energy engineering, applied chemistry, environmental engineering, food engineering and other majors. It is also one of the common unit operations in chemical and food production. It has It has the characteristics of small flow rate, small temperature difference, high heat transfer coefficient and high heat flux density, so it is widely used in energy, chemical industry, refrigeration, medium and low temperature power generation, and seawater desalination. However, the current experimental device research has the following deficiencies: it only studies a single e...

AI Technical Summary

Problems solved by technology

However, the current experimental device research has the following deficiencies: it only studies a single evaporation or absorption experimental device, and cannot combine evaporation and absorption to conduct research at the same time; The vertical tube falling film heat and mass transfer experimental research of various refrigerants and mixed working fluids is almost at a blank stage; it is impossible to track and monitor the temperature and pressure changes of the working medium solution and steam in the circulation system

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