Fast cooling device for steam turbine

Abstract

The invention discloses a steam turbine rapid cooling device, which is mainly composed of an air inlet flange, an oil-water filter, an air heater, a pipeline, a stop valve, a pressure gauge, a flow meter, a temperature measuring element and a gas collection box. There is an air inlet flange on the left side of the oil-water filter, a connecting pipe on the right side of the oil-water filter, a pressure gauge on the right pipe of the oil-water filter, a flow meter on the right side of the pressure gauge, and a flow meter on the lower right side of the oil-water filter. Air heater, the two sides of the air heater are connected with pipes, the pipe on the right side of the air heater is provided with a stop valve, the pipe below the air heater is connected to the gas collection box, and the right side of the air collection box is provided with a temperature measuring element. The invention can be used to dry steam turbines and prevent moisture corrosion. Therefore, after using the device, the operation rate of the unit can be improved, and the contradiction between power supply and demand can be alleviated, which has obvious practical significance and economic benefits.

Description

technical field [0001] The invention belongs to the technical field of cooling devices, in particular to a fast cooling device for steam turbines. Background technique [0002] At present, steam turbines generally use high-quality thermal insulation materials such as calcium silicate and aluminum silicate. Their thermal insulation performance and safety performance have been greatly improved, but the cooling time for steam turbine maintenance has been greatly increased. The larger the capacity of a single unit, the more prominent the contradiction . At present, the method of forced ventilation cooling is widely used to cool the cylinder of the steam turbine, and the main object of the accelerated cooling of the steam turbine is the high and medium pressure cylinders of the steam turbine. Through theoretical demonstration and practice, it has been proved that downstream cooling is more reasonable. In order to prevent thermal shock at the beginning of cooling, the heating tem...

AI Technical Summary

Problems solved by technology

But current cooling equipment cannot provide suitable dry hot air for cylinder cooling of steam turbines

The steam turbine needs to be warmed up before starting up, and the time period for warming up is relatively long, which seriously affects the start-up time of the steam turbine

When the steam turbine is shut down for standby, the humid air is easy to corrode the internal equipment of the steam turbine, which will affect the service life of the steam turbine and even cause safety hazards

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