Pipeline flushing method for steam turbine lubricating oil system

Abstract

The invention relates to the technical field of lubricating oil flushing, in particular to a pipeline flushing method of a steam turbine lubricating oil system, comprising step 1. manually cleaning the interior of the main oil tank, clean oil tank, and dirty oil tank with cleaning substances; step 2. washing the temporary oil Inject into the cleaned clean oil tank or dirty oil tank; step 3. Use the oil supply pump and oil delivery pump to circulate and flush the temporary oil used for flushing between the main oil tank, clean oil tank, dirty oil tank and connecting pipelines until the flushing time is 8 hours and return to the oil filter for collection The total amount of impurities does not exceed 1.0g, and all the temporary oil for flushing is discharged to the outdoor oil storage device; Step 4. Manually clean the inside of the main oil tank, clean oil tank, and dirty oil tank with cleaning materials; Step 5. Confirm necessary temporary measures It has been installed. The pipeline flushing method of the lubricating oil system of the steam turbine can greatly improve the cleanliness of the pipeline of the lubricating oil system of the steam turbine, and provide guarantee for the safe, stable and reliable operation of the steam turbine and its subsidiary systems.

Description

technical field [0001] The invention relates to the technical field of lubricating oil flushing, in particular to a pipeline flushing method for a lubricating oil system of a steam turbine. Background technique [0002] The lubricating oil system of the turbogenerator set is an important subsidiary system of the turbogenerator set. Its main function is to provide lubricating oil for the supporting bearings, thrust bearings and turning gear of the turbogenerator set. The sealing oil system provides a backup oil source to ensure the needs of the unit in normal operation and accident conditions. Pipeline flushing of lubricating oil system is a safe and reliable method to remove all external impurities that may enter the oil system, so as to avoid damage to steam turbine bearings caused by impurities. [0003] The existence of impurities in the lubricating oil system will cause friction between the various parts as the steam turbine running time increases, and at the same time,...

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Problems solved by technology

[0003] The existence of impurities in the lubricating oil system will cause friction between the various parts as the steam turbine running time increases, and at the same time, a large amount of lubricating oil will be lost, which will weaken the flexibility of the various parts of the steam turbine, make the steam turbine not operate normally, and damage the running parts The stability between them, and if the operation time is too long, it may also make the steam turbine work load too heavy, and then damage the steam turbine

Moreover, due to the rapid flushing of impurities and high oil pressure, the cover effect of the steam turbine cannot be fully exerted, resulting in excessive oil pressure swings

And in the speed control system of the steam turbine, because the various pulses of the operation change differently and the range is small, the excessive swing of the oil pressure will also affect the excessive swing of the speed control system, and even cause the speed control system to generate load

In addition, during the operation of the steam turbine, the change of oil pressure is closely related to each speed control system, so the impurities in the lubricating oil system will also affect other speed control systems, causing the speed control system to jam, which will seriously damage the Caused the steam turbine out of control, causing a safety accident

[0004] In order to provide safe and reliable lubricating and cooling oil for steam turbine bearings, the lubricating oil system of steam turbines is usually finely designed, with a large number of equipment and complicated pipeline layout. Therefore, it is difficult to flush the lubricating oil system, and it will consume a lot of time and manpower

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