Evaporative crystallization device used for experiment teaching

Abstract

The invention discloses an evaporative crystallization device used for experiment teaching. The evaporative crystallization device used for experiment teaching comprises a digital display heating andstirring device, wherein a supporting column is arranged on an operation table-board of the digital display heating and stirring device, a supporting disk is arranged on the upper portion of the supporting column, a supporting and heating disk is arranged on the lower portion of the supporting column, the supporting disk is located over the supporting and heating disk, a raw material liquid storage tank is arranged on the supporting disk, the raw material liquid storage tank is connected with a raw material liquid inlet of a heat exchanger through a raw material liquid output pipe, a raw material liquid outlet of the heat exchanger communicates with a liquid dropping device through a raw material liquid input pipe in a sealed mode, and the liquid dropping device is connected with an evaporation bottle in a sealed mode. The experiment device is simple in structure and little in occupied space; free assembly and disassembly are convenient, carrying is convenient, and the experiment device can be used for conducting demonstrative experiments, and can be used as experiment equipment of a laboratory; the experiment device does not need fluid transportation equipment, so that the equipment cost and the operation cost are saved; and by adding the double-pipe heat exchanger, the purposes of saving energy and protecting the environment are achieved.

Description

technical field [0001] The invention belongs to the technical field of evaporation and crystallization devices for experimental teaching, in particular to an evaporation and crystallization device for experimental teaching. Background technique [0002] Experimental teaching is an indispensable teaching link in the professional basic courses such as chemical engineering principles and food engineering principles, which are compulsory for engineering majors in colleges and universities. In order to improve the effect of experimental teaching, various new experimental teaching devices have been designed and developed. Devices for Bernoulli equation experiments (a Bernoulli equation demonstrator, Chinese invention patent, 2015, CN104282203; self-circulating Bernoulli equation tester, Chinese utility model patent, 2004, CN2729678), for centrifugal pumps and resistance experiment device (fluid flow resistance and flow measurement self-assembly experimental device, Chinese utilit...

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Problems solved by technology

Due to the lack of experimental equipment for experimental teaching, current textbooks usually use plane structure diagrams to display evaporation and crystallization equipment in industrial production (Feng Bing. Principles of Food Engineering, "Tenth Five-Year Plan" National Planning Textbook for General Higher Education, Beijing: China Light Industry Press, 2016:240-244; Chen Minheng, Cong Dezi, etc. Principles of Chemical Engineering, "Tenth Five-Year" National Planning Textbook for General Higher Education, Beijing: Chemical Industry Press, 2006:185-192.), this method lacks three-dimensionality, The entire dynamic process of evaporation and crystallization cannot be described. Usually, the spatial structure, working process and working principle of the equipment require students to imagine out of thin air, and the teaching effect is poor.

The dynamic picture of the central circulation tube evaporator produced by Sun Yat-sen University describes the dynamic process of the evaporation process, which is of great help to improve the teaching effect, but the dynamic picture about evaporation and crystallization is still rare, and the dynamic picture still cannot describe the space of the equipment in detail structure, it is difficult to let students deeply understand the principle and operation of the whole process through the explanation of the equipment structure

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