Permanent magnet variable frequency air compressors are familiar to everyone. More people understand the permanent magnet variable frequency air compressors, but in the environment where high gas consumption is required, its energy efficiency is still relatively low, but the two stages screw air compressor technology is Can solve this problem very well.
The two stages screw air compressor has higher exhaust capacity than the single-stage compression screw air compressor of the same power. At present, the technology can realize energy saving of 120,000 tce/a and carbon dioxide emission reduction of about 320,000 t/a.
First, the technical principle
Two-stage compression is used to increase the energy efficiency of the compressor. The main reasons are:
Each stage reduces the compression ratio, increases the volumetric efficiency, and reduces the internal and external leakage. The oil and gas mixture can be fully mixed before the first-stage exhaust enters the secondary suction process, which plays the role of interstage cooling. The level of compression is close to the ideal isothermal compression process.
Second, technical characteristics
1. Adopting high-efficiency rotor profile technology, after more than 20 finishing processes, ensure the efficiency and reliability of the two-stage compression host.
2. Using interstage cooling technology, a plurality of injection holes are installed on the compressed gas passage to form a mist spray curtain, which reduces the compression temperature and is close to isothermal compression.
3. The characteristic oil lubrication system is adopted. The independent lubrication system is adopted for compression and bearing lubrication to ensure the lubrication of the main engine and improve the service life of the main engine.
4. Other system structure optimization techniques, etc.
Third, the workflow
The natural air enters the first stage of compression through the air filter, mixing with a small amount of lubricating oil in the compression chamber, and compressing the mixed gas to the interstage pressure. The compressed gas enters the cooling passage and comes into contact with a large amount of oil mist, which greatly reduces the temperature. The cooled compressed gas enters the second stage rotor, undergoes secondary compression, and is compressed to the final exhaust pressure.
These are the reasons for choosing a two stages screw air compressor.
