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VACUUM ›› 2020, Vol. 57 ›› Issue (5): 79-84.doi: 10.13385/j.cnki.vacuum.2020.05.17

• Vacuum Acquisition System • Previous Articles     Next Articles

Design Method and Engineering Application of Liquid Ring Compression System Based on Thermodynamics Theory

XU Fa-jian, HUANG Zhi-ting, LIU Bao-xin   

  1. Zibo Vacuum Equipment Plant Co., Ltd., Zibo 255200, China
  • Received:2019-07-22 Published:2020-11-06

Abstract: The paper analyzes the working principle and process of the liquid ring vacuum pump and the liquid ring compressor. It is the first time that the different design concepts of the vacuum pump and the compressor are put forward. The geometric design method of the liquid ring pump is analyzed. Based on the energy transfer and conversion, the liquid ring compressor is designed by the energy conversion calculation method. According to the change of the gas required in the process, it is transformed into the design input of differential pressure and compression ratio of the compressor, and the mathematical model of the energy conversion foundation is established. By transforming the kinetic energy of the liquid ring into the pressure potential energy, the necessary kinetic energy suitable structure of the compressor is determined, and the basic parameters of the compressor structure are provided. Through theoretical calculation, the trend line of compressor's maximum pressure is given. The application of this design method shows that the liquid ring compressor can realize different outlet pressure, and can realize the comprehensive and compound utilization of vacuum-pressure. Combining with engineering practice, the suggestion of compressor individualization, safety and energy saving is put forward. It is suggested that the index of liquid ring compression should be checked by systematic method to promote engineering practicality and compressor technology development.

Key words: vacuum pump, compressor, energy conversion, tip velocity of impeller, gas recovery, vacuum-compression system, chemical gas transportation, system energy assessment

CLC Number: 

  • V216.5+7
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