High back pressure in the turbine
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The backpressure network of the unit wants to have its pressure increased in order to improve steam utilization. To this end, I would like to mention the negative pressure of the turbine. However, the trip pressure of the backpressure safety valve is 1.3 MPa, and I want to raise the pressure in the pipeline network to 1.6 MPa. I would like to know if this will have any impact on the unit
The setting pressure of the safety valve is 1.3 MPa; raising the pressure to 1.6 MPa is a bit risky.
It can’t be adjusted much; the spring just has that much tension. Can the spring be replaced alone?
The effects on the turbine unit include factors such as displacement, vibration, and temperature. I’ve never heard of replacing just the spring in a safety valve; personally, I think that’s a bit risky.
1. First, the safety valve needs to have its setting pressure adjusted again, but this requires design calculations, the preparation of a modification order, and approval from the relevant departments. 2. When the back pressure is high, the steam consumption of the turbine increases; it is necessary to determine whether the load on the pipeline network can meet the requirements. 3. The impact of rising exhaust temperature due to high back pressure on process operation. 4. Whether the strength of the blades in the low-pressure section meets the requirements when the back pressure is high.
LZ, in order to increase steam utilization, should we raise the back pressure? I can only say it backfired, and it might even be more harmful than beneficial. Do you have plenty of medium-pressure steam? The low-pressure steam is increased to 1.6 MPa; how many main steam usage points are there, and does the process design meet the requirements? Can it be solved from a technical perspective, for example by providing dedicated supply systems and adding devices such as temperature and pressure reducers?
What is the design back pressure of the turbine? The back pressure was increased from 1.3 Mpa to 1.6 Mpa. The blade load of the turbine has an impact.
1. Increasing the backpressure on the compressor raises steam consumption and reduces the efficiency of the turbine; it is recommended not to make such changes； 2. The safety valve can be repurchased and readjusted from a valve manufacturer ； 3. If your company does not have industrial or heating demands for low-pressure steam, it can be designed as a condensing low-pressure steam power generation system, which will **improve energy efficiency and economic benefits**.