Large steam centrifugal compressor volute and method for eliminating secondary flow loss

Abstract

The invention provides a large-scale steam centrifugal compressor volute eliminating the secondary flow loss and a use method of the large-scale steam centrifugal compressor volute eliminating the secondary flow loss and belongs to the field of evaporation and concentration and power engineering. The large-scale steam centrifugal compressor volute eliminating the secondary flow loss is composed of a diffuser, a left deflector, a right deflector, a volute body and the like. Through the deflectors additionally arranged inside the volute body, the secondary flow loss formed in the flowing process of fluid in the volute is effectively reduced, and the pneumatic performance of the volute is improved; meanwhile, through series flow holes in the deflectors, and the flow loss caused by the fact that a boundary layer of each deflector is thickened is reduced; and in addition, the deflection, under the internal and external pressure difference inside a compressor, of the volute body is reduced, a supporting function on the volute body is achieved, and the possibility that an impeller scrubs a shell of the compressor is lowered. By the adoption of the large-scale steam centrifugal compressor volute eliminating the secondary flow loss and the use method of the large-scale steam centrifugal compressor volute eliminating the secondary flow loss, the flow loss of diffuser airflow in the volute is effectively reduced, the operation efficiency of the centrifugal compressor is improved, the safety of the negative-pressure operation centrifugal compressor is improved, and the large-scale steam centrifugal compressor volute eliminating the secondary flow loss meets the target of the national industrial energy conservation and emission reduction development strategy.

Description

technical field [0001] The invention relates to a volute of a large water vapor centrifugal compressor for eliminating secondary flow loss and a method thereof, belonging to the fields of evaporation concentration and power engineering. Background technique [0002] The water vapor compressor is the core component in the field of evaporation and concentration, especially in the vapor recompression system. The temperature and pressure of the water vapor are increased by the compressor to establish the heat exchange temperature difference between it and the incoming material, so as to recover the latent heat of the water vapor, which has a significant energy-saving effect. After the airflow in the compressor flows out of the diffuser and enters the volute, due to the secondary flow loss in the volute, the aerodynamic efficiency of the volute is finally low, and because the water vapor compressor works under negative pressure conditions, it is inevitable The radial deformation...

AI Technical Summary

Problems solved by technology

After the airflow in the compressor flows out of the diffuser and enters the volute, due to the secondary flow loss in the volute, the aerodynamic efficiency of the volute is finally low, and because the water vapor compressor works under negative pressure conditions, it is inevitable The radial deformation of the volute will eventually lead to the scraping of the impeller and the casing, reducing the safety of the compressor operation

At present, the research on improving the aerodynamic efficiency of the water vapor compressor volute and suppressing the corresponding deformation has not attracted attention, and there is a lack of effective solutions.

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