Oil removal from urea compressors

What is “handling oil”? Could we first get a noun definition? ? :L

Where is the best place to install oil removal for a urea compressor? What does LZ mean? ? ?

Haha, everyone can’t figure out what the original poster means

Sorry, there’s a typo; it should be “degreasing”

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LZ may refer to the oil-water separation issue of the urea CO2 compressor. Traditional mechanical separators generally use methods such as gravity sedimentation, baffle plates, centrifugal separation, and wire mesh defoaming. Due to the limitations of their separation mechanisms, it is often difficult for them to achieve the purity levels required for purifying process gases. Due to the small size of this inter-segment separator, it is recommended to use an efficient separator for oil removal. High-efficiency separation relies primarily on deep filtration; it requires relatively high specifications for the equipment, offers high separation precision, and should be able to meet production needs.

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I agree with the opinion from the 7th floor. Due to the limitations of the removal mechanisms, even the best direct-collision-type oil removal devices (including baffle plates, centrifugal separation, and wire mesh defoamers) have little effect on capturing oil mist particles with a particle size of less than 20 microns; those with a particle size of less than 3 microns simply get carried away along with the airflow. However, the lubricating oil mist present in the gas after passing through the compressor can have particle sizes of less than one micron, and there is a significant amount of such extremely small oil mist particles. This is precisely why it is difficult to remove oil from the gas after compression. In China, few people realize the importance of eliminating this type of hard-to-remove oil mist, and even fewer conduct research to address this issue. If you are interested, I have relevant materials that can help you.

Indeed, conventional mechanical oil removal methods find it difficult to completely eliminate small particles of oil mist； If extremely high standards are required regarding the oil content in gases, ultrafiltration technology can be used for oil removal. Ultrafiltration relies on the filtering action of microporous filters to remove small oil particles from the gas; these filters are made of ultra-fine glass fiber paper with pore sizes of less than 1 micron. The filtration process involves a combination of mechanisms such as diffusion, interception, and collision, enabling the effective capture of sub-micron particles ； The filtration precision can reach 0.01 um, and the residual oil content can reach 0.01 mg/m3 ； Currently, ultrafiltration technology is widely used in oil separators, ammonia separators, methanol separators, etc., in ammonia synthesis plants, with a maximum operating pressure of up to 32 MPa; it is a very promising new technology.

Please have the friend on floor 9 send the relevant materials to ckx8966@126.com. Thank you