A, the nozzle
The nozzle is an important part that affects the performance of the vacuum pump. There are some problems: the nozzle is installed wrongly, installed crooked, blocked, damaged, corroded and leaked. On the one hand, when installing the steam pipe, the residual iron and welding slag in the pipe will block the nozzle; On the other hand, when the vacuum pump system is out of service, the steam pipe is easy to rust, and the rust spot drops and blocks the nozzle during use.
Steam pressure
Low steam pressure and pressure fluctuation have a great impact on the capacity of the vacuum pump, so the steam pressure should not be lower than the required working pressure, but the vacuum pump structure design has been finalized, too much increase in steam pressure will not increase the volume and vacuum degree. In addition, to ensure that the boiler supply steam pressure stability, it is best to use a boiler dedicated to the steam jet pump to provide working steam, so that the steam pressure will not appear fluctuations, to ensure the stability of the vacuum pump performance.
Iii. Operating environment
Environment is mainly refers to the influence of the gas is pumped to the system of pollution, in the process of liquid steel disposal, liquid steel can emit a lot of gas, but also there will be a part of the subtle oxidation sheet jelly and other small particles drawn into a vacuum pump, these small particles can accumulate adhesion on the pump body, reduced the bleed line flow guide, extended the extraction time, decreased pump can qigong.
Circulating cooling water
If the cooling water supply is insufficient, the condenser will generate heat, the air flow will become louder, the vacuum degree will decrease rapidly, and even the steam will return to the suction pipe. Condensate plays an important role in the multistage vacuum pump. Condensate can condensate the steam in an abundant manner. The partial pressure of water vapor in the discharge pressure of the vacuum pump is necessarily higher than the corresponding full steam pressure.
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