The main reason for the need for multi-stage ejectors is their ability to achieve higher vacuum levels and more complex industrial requirements. Here’s a detailed explanation of the need for multistage injectors:
Increased vacuum
A multi-stage ejector consists of a plurality of injectors and diffusion tubes, and the inlet of each stage injector receives a high-velocity air flow from the previous stage diffusion tube, forming a high-velocity gas mixture, which enters the next stage of the diffusion tube.
This design allows the multi-stage injector to gradually reduce the pressure of the gas, thereby increasing the overall vacuum level. Compared to single-stage ejectors, multi-stage ejectors can achieve higher vacuum levels under the same conditions.
Meets specific industrial needs
In some industrial applications that require a high vacuum level, such as semiconductor manufacturing, vacuum freezers, etc., single-stage ejectors may not meet the demand. Multi-stage ejectors, on the other hand, are better able to adapt to these occasions due to their higher vacuum level.
Especially in special processes such as oilfield gas production, it is necessary to meet the harsh conditions such as a small pressure difference between the mixed fluid and the working fluid and a large compression ratio to be achieved at the same time. In this case, a single-stage injector is not sufficient, and a multi-stage tandem injector becomes the only viable option.
Simple structure and easy maintenance
The structure of the multistage ejector itself is relatively simple, and the manufacture is not complicated. In addition, it has no moving parts, generally does not need to be operated by personnel, can work continuously and reliably for a long time, and maintenance management is very convenient.
This characteristic makes the multi-stage injector have high reliability and stability in practical applications, and can meet various complex industrial needs.
In summary, the main reason for the need for multi-stage ejectors is their ability to increase the vacuum level, meet specific industrial needs, and have the advantages of simple construction and easy maintenance.
