The impelling ratio of the steam jet pump decreases
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My unit is currently equipped with a newly installed steam jet pump that uses medium-pressure steam at 3.5 MPa in combination with low-pressure steam at 0.4 MPa to reach a pressure of 0.8 MPa. During testing, it was observed that as the flow rate of the medium-pressure steam increased (from 5 t/h to 8 t/h), the amount of low-pressure steam extracted decreased (from 4.5 t/h to 2 t/h). The design capacity is 21 t/h for medium pressure and 18 t/h for low and low pressure. What causes this?
Will the thickness of the two pipes affect their respective volumes?
Who designed the injector? The induction coefficient can be quite high; 21 t/h can be pumped out using 18 t/h! This impingement coefficient is generally not even achievable by high-quality ejectors available abroad; it’s already quite good to be able to extract 18 t/h from a system designed for 24 t/h! ! As you said, it’s around 26 t/h, with a withdrawal rate of 14–16 t/h; the figures given in writing are theoretical values, while those from testing are actual values – they’re pretty much the same!