Buoyancy flow distributor and sealing oil vacuum high-efficiency degassing device

Abstract

Buoyancy type flow distributor and sealing oil vacuum high-efficiency degassing device, the distributor includes a distributor body, a floating ball placed in the distributor body that is basically close to the density of the sealing oil, set at the upper and lower ends of the distributor body to limit the floating The baffle plate for the ball displacement, the throat that is set in the middle position of the distributor body and plays the role of the middle switch position, the sight glass that is set on the side wall of the distributor body for observing the position of the floating ball, the inner diameter of the throat is the same as the The diameters of the floating balls are the same; the present invention also provides a vacuum high-efficiency degassing device for sealing oil using the buoyancy flow distributor; the present invention can ensure that the sealing oil pump can work normally in any state, so as to prevent the oil discharge pump It will lead to the safety accident of oil cut-off of the sealing oil pump, and make all the sealing oil go through the vacuum degassing system for gas removal, further improving the 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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