What Are The Applications Of Air Compressors In Power Systems?

- Feb 11, 2019-

Electricity is one of the most important energy sources in the country. Basically, it needs to be useful in any industry. In the power system, the use of air compressors is needed. The following is a brief description of the application of air compression systems in the power industry. Configuration.

Some time ago, most of China's areas, the "electricity", the main reason is the thermal power station, because the country severely rectified the coal industry, shutting down a large number of "small coal mines", coal prices rose, one day of electricity, enterprises will lose money Hundreds of thousands, just in time, in most areas, today, there is less rainfall, and hydropower stations have no water to generate electricity. It caused electricity.

Electricity is one of the most important energy sources in the country. Basically, it needs to be useful in any industry. In the power system, the use of air compressors is needed. The following is a brief description of the application of air compression systems in the power industry. Configuration.

First, the thermal power station

The compressed air in the thermal power station is mainly introduced by the instrument compressed air system, the factory miscellaneous compressed air system, the water disposal compressed air system and the ash removal compressed air system: four different places.

1. Control the instrument with compressed air system:

The operation of a thermal power generating unit requires a large number of control instruments to support the operation. The operation of these control instruments is controlled by compressed air. The air pressure for controlling the pressure of the instrument is usually 0.650.70Mpa. Generally, the 2300MW thermal power can be determined according to the capacity of the thermal power unit.

The compressed air consumption for the instrument is 40 units. Considering that the thermal power unit is usually in operation, the demand for compressed air in two processes is sometimes large and sometimes small. When the gas consumption is less than 20m3/min. One of the 20m3/min screw air compressors will automatically stop. That is, compressed air can not stop the special requirements of compressed air at any time.

Therefore, the configuration of the air compressor requires two installations and one maintenance. Of course, the configuration of many thermal power plants is not exactly the same. After the air compressor is selected. Because of the compression of air, we must consider the quality of compressed air. According to the air, the quality of the compressed air is high.

The quality level of compressed air for instrumentation ISO/DP8573/188 is generally set at 2-3-2, ie solid particle level 2; water content level 3; oil content level 2. past. The instrument uses a compressed air injection screw compressor to develop slowly. Domestically used 2Z3/82Z3/ usually use oil-free reciprocating air compressor to produce.

The outstanding advantages of the screw air compressor now determine the phasing out of the reciprocating air compressor. The technical level of air purification equipment has increased, and more. With the spray completely, the compressed air oil screw air compressor of the instrument can be used together with the air purification equipment. Quality requirements. Of course, oil-free screw air compressors are also possible but economically. It is easier to run and maintain. The use of oil-injected screw air compressors is less expensive.

2. Factory miscellaneous compressed air system:

Like purging pipes. The amount of gas used is generally determined by the size of the power station and its use, for example: a 2300 MW thermal power unit. The amount of gas used in the factory's miscellaneous compressed air is generally two for a 20m3/min screw because the compressed air is used to purge the pipeline or to supply air to the compressor of the machine.

Used for pneumatic tools, etc. Moreover, the quality of the misuse of compressed air is not high. Therefore, the general factory misuse of compressed air is like the compressed air of the instrument cannot stop the supply of air. The compressed air system does not need to be equipped. According to the requirements of the ISO/DP8573/183 specification. The quality requirement is 4-6-5, that is, the solid particle is 4 grade; the water content is 6 and the oil content is 5 grade.

3. Water treatment compressed air system:

The water treatment system of a hydropower station is generally divided into a boiler feed water treatment system and an industrial wastewater treatment system.

3.1 boiler feed water treatment system

The boiler feed water treatment system can be roughly due to the difference in water quality of each power plant. Divided into three major types. The better the water quality of each water treatment source, the simpler the water treatment system. There are some pneumatic diaphragm valves and pneumatic instruments between these valves and instrumentation systems. The action is achieved by compressed air. In general, the compressed air consumption is not very large.

However, the quality of compressed air is high. For example, a boiler feed water treatment system of a power plant only needs one m33/min air compressor. Two m33/min were arranged to take into account factors such as the standby machine. Air compressor. The power plant's water treatment system requires compressed air quality with a two-stage oil filtration and adsorption dryer. Recommended according to the ISO/DP8573/188 specification. The quality requirements of the compressed air of the system are generally: 233, solid particle level 2; water content 3; oil content 3

3.2 Wastewater Treatment System

Wastewater treatment system. Because part of the compressed air is used in pneumatic equipment. For some devices, the other part of the compressed air is controlled by compressed air to agitate the wastewater (some power plants use a Roots blower for agitation). For different wastewater treatment equipment, this system uses different amounts of compressed air.

4. Compressed air system for ash removal:

The ash removal system can be divided into a negative pressure ash removal system, a positive pressure ash removal system, a low positive pressure ash removal system and a hydraulic ash removal system according to different pressures. These four ash removal systems. The so-called positive pressure ash removal system requires a compressed air to remove ash. The air compressor and the silo pump are used to form a positive pressure in the ash conveying pipeline for pressure transmission.

Among them, the warehouse pump is divided into a single warehouse pump and a multi-bin pump. The output of the system is mostly in the range of 10~60t/h. The distance is less than 1000m. The amount of compressed air required for multiple transport modes in a positive pressure ash removal system is also different.

Second, hydropower station

The screw air compressor is mainly used for the compressed air system of the instrument, the miscellaneous air system in the plant and the compressed air system for the power of the equipment. The instrumentation compressed air system of the hydropower station is the same as the instrumentation compressed air system of the thermal power station, but the gas consumption is different from that of the compressed air system of the instrument of the thermal power station. The requirements for the quality of the compressed air vary depending on the amount of gas used. The miscellaneous compressed air system in the plant is mainly used for equipment maintenance and pipe cleaning. The gas consumption is similar to that of the hybrid air system of a thermal power station.

The requirements for compressed air quality are also the same as those for hybrid power plants. The equipment power of the hydropower station is mainly used for the replacement between generator sets in the compressed air system. Moreover, the amount of gas used is relatively large, as well as the brakes of the generator set. The quality of the compressed air is similar to the quality of the compressed air used in the instrument.

Third, the nuclear power plant

In the application of screw air compressor in nuclear power plant, compared with the thermal power station, there may be only one ash removal system. The other three applications should use the screw air compressor. The capacity of the air compressor can be determined according to the scale of the power station. . The requirements for compressed air quality can be set according to the corresponding system requirements of the thermal power station. In addition, fixed screw air compressors are also used in the construction of nuclear power plants.