I would like to ask the teachers about catalytic back-pressure steam turbines.
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I would like to ask the experts: In a catalytic back-pressure steam turbine, if the steam pressure drops from 35 kilograms to 27 kilograms while the superheated steam temperature remains around 420 degrees, can operations continue in order to maintain a pressure difference of 10 kilograms by reducing the pressure to 7 kilograms? At what pressure level must operations be stopped?
Production can be maintained. A back-pressure turbine with an inlet steam pressure of 35 kilograms can also be used with superheated steam at 10 kilograms, with the exhaust steam being sent to a pipeline system at 3 kilograms pressure.
Personally, I think that with the parameters you provided, production can be maintained. As a precaution, the rotational speed can be reduced; for example, if it was originally 6500 revolutions per minute, it can now be lowered to 6200 revolutions per minute. If the main steam pressure continues to drop, the rotational speed can be reduced further. Of course, before reducing the speed, the amount of work to be done also needs to be decreased.
The backpressure machine is equipped with an interlock for low exhaust pressure at the outlet
We can reduce it to a minimum of 24 MPa, provided that the steam backpressure is lowered by 1.0 MPa and the backpressure interlock is disabled to prevent surging in the unit; if necessary, the compressor outlet can be connected to a flare system
It depends on your actual operating conditions; if normal operation can be restored in a short time, you can remove the back pressure and just maintain the rotational speed for a short period.
I would like to ask the experts: In a catalytic back-pressure steam turbine, if the steam pressure drops from 35 kilograms to 27 kilograms while the superheated steam temperature remains around 420 degrees, can operations continue in order to maintain a pressure difference of 10 kilograms by reducing the pressure to 7 kilograms? At what pressure level must operations be stopped? A back-pressure steam turbine that operates on pressure difference can maintain operation for a short period of time. However, low pressure leads to low temperatures, which can damage the units; to maintain production it is necessary to ensure the safety of these units, otherwise the costs will outweigh the benefits.