Steam temperature and pressure regulation
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This post was last edited by ku on 2021-4-11 at 11:53. Currently, there is a heat exchanger in our workshop that uses superheated steam at 1.0 Mpa and 250 degrees Celsius as the heat source. This steam is purchased externally, while our workshop produces saturated steam at 4.2 MPa and 255 degrees Celsius, as well as superheated steam at 4.2 MPa and 400 degrees Celsius. Could everyone use steam produced internally instead of purchased steam to achieve self-sufficiency in steam? Is it feasible, and how should it be designed? Is this feasible?
It’s definitely possible; you just need to reduce the pressure by using a control valve
The workshop produces saturated steam at 4.2 MPA and 255 degrees Celsius, which requires pressure reduction facilities such as pressure reducing control valves； For superheated steam at 4.2 Mpa and 400 degrees Celsius, pressure and temperature reduction facilities are required; not only pressure control valves are needed, but also auxiliary equipment for temperature reduction, such as multi-stage pumps to feed soft water into the system for temperature reduction. This isn’t very accurate; we also need to take into account the traffic volume, to see if the hourly flow is sufficient. If the volume is large, with 4.2 Mpa and superheated steam at 400 degrees Celsius, after generating electricity via a turbine, the steam can be supplied for use in the workshop; in such cases, consideration can be given to selecting an appropriate turbine, and there may be no need to consider temperature and pressure reduction.
Can the saturated steam at 4.2 Mpa be reduced to 1.0 Mpa at a temperature of 191 degrees Celsius, and the superheated steam be reduced to 1.0 Mpa at a temperature of 370 degrees Celsius? By combining these two types of steam, is it possible to achieve the specifications of the purchased steam, thereby allowing the existing heat exchangers to continue to be used?
Can the saturated steam at 4.2 Mpa be reduced to 1.0 Mpa at a temperature of 191 degrees Celsius, and the superheated steam be reduced to 1.0 Mpa at a temperature of 370 degrees Celsius? By combining these two types of steam, is it possible to achieve the specifications of the purchased steam, thereby allowing the existing heat exchangers to continue to be used?
We buy steam from others, and we also sell high-pressure steam. The purchase price is much higher than the selling price, and the volume of deliveries isn’t very large. There are only a dozen or so servings per hour, which is enough to reduce pressure and meet one’s own needs. Turbogenerators and such are too complex; what’s on my mind now is whether it’s possible to use saturated steam and superheated steam in combination, then reduce the pressure to match that of commercially available steam
Sure, use the previous small generator set – it can be operated after the steam pressure is reduced, thus preventing energy waste :)
It should be divided into two streams: the positive-pressure steam is reduced to superheated steam at 1.0 Mpa and 250 degrees Celsius using a temperature and pressure reduction device； A temperature reduction device is used to lower superheated steam from 400 degrees Celsius to superheated steam at 250 degrees Celsius. The above-mentioned mixed cooling and pressure reduction are difficult to control!
This estimate isn’t good; the difference is too large