What causes the vacuum pump efficiency
Release time:
2021-11-12
1. Steam pressure
Low steam pressure and pressure fluctuations have a greater impact on the ability of the vacuum pump, so the steam pressure should not be lower than the required working pressure, but the structure design of the vacuum pump has been finalized, and too much steam pressure will not increase the pumping capacity and vacuum. In addition, to ensure that the steam pressure supplied by the boiler is stable, it is best to use a boiler to provide working steam to the steam jet pump, so that the steam pressure will not fluctuate and the performance of the vacuum pump will be stable.
2. Circulating cooling water
If the cooling water supply is insufficient, the condenser will heat up, the airflow sound will become louder, the vacuum will drop rapidly, and even the steam will return to the extraction pipe. Condensed water plays an important role in multistage vacuum pumps. Condensed water can fully condense steam. The partial pressure of water vapor in the discharge pressure of vacuum pump must be higher than the corresponding full steam pressure. Therefore, the temperature of condensed water should be lower than the full temperature under the pressure to ensure the normal operation of the pump body.
3. Nozzle
The nozzle is an important part of the performance of the vacuum pump, the problems are: the nozzle is installed wrong, slanting, blockage, damage, corrosion and leakage, no matter what preventive measures are taken, the nozzle blockage is inevitable. On the one hand, due to the installation of steam pipes, the remaining iron chips 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 spots fall off and block the nozzle during use.
4. Use environment
The impact of the environment mainly refers to the pollution of the pumped gas to the system. In the process of molten steel disposal, a lot of gas will be released from the molten steel, and at the same time, some fine particles such as oxidized vermicelli will be sucked into the vacuum pump. These small particles will accumulate and adhere to the pump body, reducing the flow conduction of the extraction pipe, prolonging the extraction time and reducing the extraction function of the pump.
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