Buoyancy type flow distributor and sealing oil vacuum efficient degasser

Abstract

Provided are a buoyancy type flow distributor and a sealing oil vacuum efficient degasser. The distributor comprises a distributor body, a floating ball which is placed in the distributor body, the density of the floating ball being basically approximate to density of sealing oil, baffles which are arranged on the upper end and the lower end of distributor body and used to limit displacement of the floating ball, a laryngoneck which is arranged on the middle position in the distributor body and has an intermediate switch position effect, and a sight glass which is arranged on the side wall of the distributor body and is used to observe positions of the floating ball. The internal diameter of the laryngoneck is the same with the diameter of the floating ball. The invention also provides a sealing oil vacuum efficient degasser using the buoyancy type flow distributor. The buoyancy type flow distributor and the sealing oil vacuum efficient degasser ensure a sealing oil pump can operate normally under any condition, so as to prevent accidents of fuel cut-off of the sealing oil pump when an oil drain pump has faults, and the device performs gas removal on all sealing oil through a vacuum degassing system, so as to further improve speed and effect of degassing.

Description

technical field [0001] The invention belongs to the technical field of degassing and filtering the sealing oil of hydrogen-cooled generators, and in particular relates to a buoyancy flow distributor and a vacuum high-efficiency degassing device for sealing oil. Background technique [0002] In hydrogen-cooled generator sets, the problem of hydrogen purity decline occurs frequently in many power generation companies. Relevant regulations require that the hydrogen purity in the generator must be controlled above 96%. If the hydrogen purity is too low, it will not only cause local overheating in the generator, but also affect power generation. Dielectric strength of the machine, and will reduce the efficiency of the generator. According to the introduction of G.E Company in the United States, when a hydrogen-cooled generator with a hydrogen pressure of 0.5MPa and a capacity of 907MW drops from 98% to 95% in hydrogen purity, the friction and ventilation loss will increase by abo...

AI Technical Summary

Problems solved by technology

However, hydrogen replacement will bring three major problems: first, a large amount of hydrogen discharge will cause fire and hydrogen explosion hazards, threatening the safety of unit operation; second, the hydrogen production capacity of the on-site hydrogen production station is limited, if When the hydrogen replenishment capacity of several units in the same power generation enterprise is very large, it will exceed the hydrogen production capacity of the hydrogen production station. If the hydrogen production equipment runs at full load or overload for a long time, once a failure occurs, the generator set will be in danger of shutting down ; Third, the increase in the amount of hydrogen replenishment will also increase the cost of hydrogen production or the cost of purchasing hydrogen significantly, reducing the economical efficiency of generator set operation

However, the flow rate of ordinary vacuum oil filters is less than 12m 3 / h, in terms of processing speed and capacity, it cannot match the flow rate of the oil pump of the sealing oil system (the flow rate of the sealing oil pump is generally 16m 3 / h~40m 3 / h), in addition, in order to ensure the normal oil supply of the sealed oil pump, it is necessary to provide another path of undegassed oil directly into the sealed oil system, which leads to many power plants vacuuming and degassing after connecting to a vacuum oil filter with a normal flow rate. The effect of gas is not ideal

More importantly, for the safety of oil supply to the sealed oil pump, the ordinary vacuum oil filter cannot realize the safe supply of full-flow oil flow to the sealed oil pump under any working conditions, which has great potential safety hazards

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