Seeking advice from fellow sailors regarding steam pressure reduction solutions and cost comparisons
Thread Content
I would like to ask for your advice. Our factory plans to purchase steam externally; the supply pressure is around 2 MPa. The distance from the boundary of the factory site to the power center is approximately 350 meters. Option 1: After the steam enters the factory, a pressure reduction station should be set up nearby to reduce the pressure to a certain value (no obvious buildings can be constructed on the front side of the factory site), and then the steam is sent to the power center (where it passes through heat exchange stations and steam distribution cylinders) before being distributed to various workshops. At each workshop, the steam pressure is further reduced to 0.4–0.6 MPa, which is the pressure required for use； Option 2: The 2 MPa steam is delivered directly to the power center, where it is then reduced in pressure to b MPa before being sent to various workshops, where its pressure is reduced further to a level suitable for use ； Option 3: The 2 MPa steam is sent directly to the power center, then depressurized to b MPa, further reduced to 0.4–0.6 MPa, and subsequently delivered to the workshop. . . . . The peak steam demand has been estimated at around 25 t/h (at 0.6 MPa), with the distance from each workshop to the power center ranging from 50 to 300 meters. Which option is more reasonable? What values are appropriate for a and b, or perhaps other options? How much can the costs differ among each option? Is it better to perform a single pressure reduction for 2MPa steam, or is a second pressure reduction necessary? Thank you all, fellow sailors!
Unprofessional personal opinion: 1. After pressure reduction, the flow meter can be installed in accordance with the product requirements or relevant specifications; as long as the length of the pipe section ahead of the flow meter meets the requirements and no two-phase flow occurs in the pipeline medium after pressure reduction, there will be no problems. 2. Under the same conditions of steam temperature and pressure, an increase in pipeline resistance downstream of the pressure reducing valve leads to a decrease in flow rate. 3. The setting should be determined based on the gas demand; generally, the pressure reducing valve is installed near the user end
This post was last edited by chen5714355 on 2016-6-30 10:53. Did you have a motivation center before? Was there originally a heating system?
If a power center already exists, simply reduce the pressure at that center to the original supply pressure; everything else can remain unchanged, which saves money.
The power center has not yet been built. I’ve estimated that DN250 PN2.5 pipes would be suitable; do you mean that it’s possible to reduce the pressure to the operating level in one step, from 2.5 to 0.5, with a pressure reduction ratio of 5, which is within an acceptable range?
After some consideration, I think reducing it from 2.5 to 1.0, then transporting it to various workshops, and further reducing the pressure to between 0.4 and 0.6 depending on the specific usage requirements would be more reasonable, right?
It would be best for this system to use a steam turbine power generation system in place of the cooling and pressure reduction devices, thereby providing both electricity and steam that meets the required standards.