0.25MPA low-pressure steam applications
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Our company has a large surplus of low-pressure saturated steam at 0.25MPA, which is often vented； Moreover, the company uses more than 10 tons of superheated steam with a pressure of 5.3 MPA and a temperature of around 340 degrees, which is then depressurized to 0.8 MPA. I am considering using this high-pressure steam, along with the principle of steam ejectors, to extract the low-pressure saturated steam and produce saturated steam at 0.8 MPA. May I ask if this is feasible? Also, how many tons of saturated steam at 0.8 MPA can be produced in this way? Thank you!
What do you do after it’s designed? Should one buy materials such as steel, motors, bolts, etc., and then use a bunch of machines like lathes to manufacture steam injectors? It’s better to find a capable steam ejector manufacturer, tell them about your operating conditions, and let them design it. Bring up any doubts about the design for further discussion
I think the boss is less interested in technical solutions than in those related to economic feasibility; therefore, it’s even more necessary for the manufacturer to provide product proposals, quotes, as well as information on the expected investment returns
A steam compressor can be used to increase the pressure; this depends on your steam requirements
Actually, I just want to mix 2.5 kilograms of low-pressure steam with over 50 kilograms of steam using a ejector, in order to improve the efficiency of the low-pressure steam. I want to assess the feasibility and economic aspects before deciding whether to report this to the suppliers and my boss
Petroleum chemical plants do this; it is estimated that the steam consumption at 0.25 MPa will not be very high； The best approach is to optimize the entire plant as a whole, and to see if it’s possible to use this steam to replace those devices that require steam of lower quality but still rely on high-quality steam. This way, high-quality steam can be saved, and I think that’s a reasonable approach.
A jet pump is used to recover 0.25MPA steam, which is also utilized for heat tracing.
The steam system needs overall optimization; saying that won’t allow you to come up with a suitable solution
Hehe, let’s push it again. My request is quite simple: I want to use steam under a pressure of over 50 kilograms to raise the pressure of 2.5 kilograms of steam to 6–8 kilograms
It’s a good idea; otherwise, reducing the pressure to 5 MPa would also be a waste of energy! All calculations are based on gauge pressure; a unit with a capacity of 10 t/h and a pressure of 5.3 MPaG can raise the output of a unit with a capacity of 5.6 t/h and a pressure of 0.25 MPaG to 0.8 MPaG, resulting in an output of 15.6 t/h. However, the outlet temperature is 260 degrees, indicating superheated steam. By spraying 60-degree water (at a pressure of over 0.9 MPaG) at a rate of 1100 kg/h, the temperature can be reduced to 180 degrees, with an overall outlet flow rate of 16.7 t/h.