Why is 1.0 MPa steam used for the shaft seal of the reformation unit’s recirculation compressor?
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This facility is a catalytic reforming unit with a capacity of 2 million tons per year. Why is a steam pressure of 1.0 MPa required for the shaft seal of the recontact booster in the reforming unit (a turbine that drives two compressors)?
Your turbine is a condensing type, right? Condensing turbines create negative pressure, which increases the risk of air leakage. To prevent air from entering and affecting the lubrication system as well as the proper operation of the turbine, steam at a certain pressure is injected. Even though this helps to prevent air leakage, it is also necessary to prevent leakage of steam from the shaft seals; therefore, steam at an appropriate pressure is chosen. Personal understanding