Electricity is one of the most important energy sources in a country, and it is also the lifeblood of national economic construction and daily life. Regardless of the use of any form of power generation, compressed air is indispensable in the power station. According to different types and different occasions of the power generation industry, compressed air of different quality levels should be selected.
The so-called different types refer to the power industry mainly divided into thermal power stations, water power stations and nuclear power stations.
The so-called different occasions refer to the different use of compressed air in the same power station. Since there is so much emphasis on the use of compressed air, the following is a brief introduction to the application and configuration of the screw air compressor system in the power industry.
1. Compressed air of the thermal power station main instrument compressed air system, factory miscellaneous compressed air system, water treatment compressed air system and compressed air for ash removal The system is described in four different situations:
The operation of a thermal power generating unit requires a large number of control instruments to support the operation. These control instrument actions are controlled by compressed air pressure. For compressed air systems used in control instruments, the starting air pressure is typically 0.65-0.70 mpa.
The amount of gas used can be determined according to the capacity of the thermal power unit. Generally, for a thermal power unit with 2 times 300 MW, the compressed air volume of the instrument is 40m3/min. Considering that the amount of compressed air required by the thermal motor during operation is sometimes large and sometimes small, two 20m3/minscrew air compressor.
After the air compressor is selected, the quality of the compressed air should be considered, because the compressed air is supplied to the instrument, and the quality of the compressed air is also Higher requirements, according to ISO/DP8573/1-88 quality class standards, the instrument compressed air grade requirements are generally solid particles level 2, water content is 3, oil content is 2 levels.
When the gas consumption is less than 20m3/minscrew air compressor will automatically stop to save energy, but also due to the special requirements of the compressed air of the power station instrument That is, the compressed air can not be stopped at any time, so the configuration of the air compressor requires two installations and one maintenance. Therefore, the number of air compressors for the instrument is four 20m3/min, of course, the screw air compressor is not exactly the same configuration of many thermal power stations. .
2. The factory miscellaneous compressed air refrigeration system is used to repair machines, purge pipes, etc. The amount of air used in air compressors is also generally determined by the size of the power station.
Since compressed air is used for pneumatic tools when it is used for exiting or repairing machines, the quality of miscellaneous compressed air is not high, and Unlike the instrument, compressed air cannot stop the supply of air, so the general factory miscellaneous compressed air system does not need to be prepared.
3. The water treatment system of the hydropower station is generally the boiler feed water treatment system and the industrial wastewater treatment system
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