from 01.01.2017 until now
Russian Federation
from 01.01.2020 until now
Russian Federation
The desire for efficient and sustainable heat and mass transfer processes stimulates the development of methods for their intensification. The results of a study of a direct-flow vortex contact device used in modern column mass transfer devices are presented. The relevance of the article is due to the industry's need to improve the stability of vortex-type contact devices with significant fluctuations in gas and liquid phase loads. The main purpose of these theoretical and experimental studies is to determine the operating conditions of the contact device when a liquid layer is forced through by a gas stream. Experimental data confirmed the adequacy of the proposed theoretical model: the maximum relative deviation of the calculated values from the experimental values did not exceed 14.2%, and the average deviation was no more than 8.6%. It has been found that the minimum gas velocity required for successful penetration of a liquid layer increases naturally with increasing height of this layer. It is revealed that the maximum allowable height of the liquid column, which ensures stable gas breakdown, is achieved using an internal cylindrical pipe with a smaller nominal diameter. It is also shown that an increase in the diameter and number of holes in the plate web leads to a decrease in the gas flow rate in the inner pipe, which is most critical for small-diameter devices. With a mass flow rate of 0.04 kg/s and an inner pipe diameter of 40 mm, the gas velocity in the plate openings is 26.45 m/s, and with an increase in the specified diameter to 50 mm, the velocity decreases to 16.93 m/s. The results obtained make it possible to eliminate liquid leakage through the plate openings and ensure efficient operation of the device with the developed contact devices, increasing the overall reliability and efficiency of processes.
VORTEX CONTACT DEVICE, VIBRATION-FREE OPERATION, COEFFICIENT OF HYDRAULIC RESISTANCE, HEIGHT OF THE LIQUID COLUMN, GAS VELOCITY, HOLES IN THE PLATE WEB
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