Operation Rule of Steam Ejector and Influence Analysis of Ejection Position

In order to analyze the operation rule of steam ejector used in sewage treatment field, this paper established the mathematical model of steam ejector, simulated the internal flow state, analyzed the influence rule of external parameters on the performance of steam ejector, and analyzed the influenc...

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Bibliographic Details
Published in:E3S Web of Conferences 2021-01, Vol.252, p.2073
Main Authors: Jinhui, Zhao, Yongbo, Xia, Yufeng, Wang, Tao, Liu, Lijun, Zhang
Format: Article
Language:English
Subjects:
Blending effects
Chemical analysis
Desalination
Diamonds
Evaporation
Internal flow
Nozzles
Parameters
Pressure
Seawater
Sewage
Sewage treatment
Shock waves
Steam
Waste treatment
Wastewater treatment
Water analysis
Working conditions
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Summary:In order to analyze the operation rule of steam ejector used in sewage treatment field, this paper established the mathematical model of steam ejector, simulated the internal flow state, analyzed the influence rule of external parameters on the performance of steam ejector, and analyzed the influence rule of ejector position on the water production ratio of steam ejector multi-effect evaporation desalination system. The research results show that under the same steam ejector structure, as the pressure of the working steam increases, the mixing and disturbance of the working steam and the ejected steam become more intense, and the diamond shock wave structure increases. As the pressure of the ejected steam increases, the momentum exchange effect of the shear blending of working steam and ejected steam is accelerated, and the speed increase rate becomes larger, and the diamond shock wave structure gradually gathers toward the nozzle. As the pressure rise of the ejected steam inlet and outlet increases, the backflow phenomenon near the wall in the mixing chamber becomes more serious, and the diamond shock wave structure is reduced. With the forward movement of the ejector position of the thermal steam compressor, the pressure of the ejected steam increases, and the water production ratio of the steam ejector multi-effect evaporation seawater desalination system shows a downward trend. Therefore, choosing appropriate working condition parameters can effectively improve the working performance of steam ejector and improve its operating efficiency in the field of sewage treatment.
ISSN:2267-1242
2555-0403
2267-1242
DOI:10.1051/e3sconf/202125202073