Regarding the issue of mixing steam at different pressures
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As the title suggests, what is the state of the steam after mixing superheated steam at a high pressure of 3.9 MPa with saturated steam at 0.5 MPa using an ejector? How to calculate theoretically?
Can’t it just be steam on its own? Why mix it...
Low-pressure steam is not suitable for long-distance transmission, :)
So I still recommend using high pressure throughout the process; otherwise, if there’s a blockage, it could disrupt the workflow.
Is it to make full use of the 0.5 saturated steam? Have you used a steam ejector? I have a similar problem; any suggestions?
Based on the principles of energy conservation and mass conservation, it is necessary to know the enthalpy and amount of substance of the materials entering the system; ASPEN can be used to determine the conditions of the materials exiting the system.
It can be handled using a steam ejector (steam jet heat pump); the outlet gas is always superheated. When both high-pressure and low-pressure steam are in a saturated state, the outlet superheat is generally around 10 to 20 degrees； If it is superheated, the degree of superheating is greater; check the flow rate of the superheated steam and the level of superheating. For this operating condition, all calculations are based on gauge pressure; by increasing the pressure from 3.9 MPaG to 1.0 MPaG, an increase of 0.5 MPaG is achieved. With a capacity of 10 tons per hour, this results in an increase of 0.6 tons per hour, yielding 16 tons per hour of steam at 1.0 MPaG. For reference.
"10 tons/h can increase by 0.6 tons/h, resulting in 16 tons/h of 1.0 MPaG steam” – I don’t understand this~~
Wrong entry: 10 t/h of high-pressure steam + 6 t/h of low-pressure steam drawn in; 16 t/h of steam at 1.0 MPaG at the outlet. The ratio is like this!
Calculate based on the state of the steam, using adiabatic mixing, and determine the state accordingly.
Just apply high pressure all the way, and then use a water spray desuperheater near the point where the steam is used to convert it into low-pressure steam; there’s no need to mix this low-pressure steam with high-pressure steam. Low-pressure steam can be used elsewhere, such as in devices like deaerators.