The Urea Workshop of Zhengyuan Hydrogen Energy is upgrading its oil mist separator

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The Urea Workshop of Zhengyuan Hydrogen Energy has carried out renovations on its oil mist separators. Author/Source: Lu’an Zhengyuan Group; Date: October 15, 2021; Views: 39. An oil mist separator is an environmentally friendly product used for purifying oil mist. Its working principle involves using a fan to draw in oil vapor, which is then purified and separated. During the production process, any generated oil mist and water vapor are recycled, thereby achieving high levels of environmental protection. The main oil tanks for turbine lubricating oil are all closed, modular tanks. As part of the compressor operation process, the turbine drives the compressor to rotate at high speeds; during this lubrication process, a large amount of oil mist is generated. However, the existing exhaust fans fail to separate the oil mist effectively. Consequently, after being discharged and settled, the oil mist affects the surrounding environment and poses potential safety hazards to the operating equipment. Throughout the years, the problem of incomplete oil mist separation has been one of the major “hidden troubles” in the urea plant. This year, as part of a major overhaul, Zhengyuan Hydrogen Energy carried out modifications by installing an oil mist separator on the flue gas exhaust pipe of the main turbine oil tank. A tee fitting was added to the outlet of this exhaust pipe, and an additional oil mist separator was installed on the auxiliary line. Furthermore, a U-shaped recovery pipe leading back to the main oil tank was fitted beneath it. These measures enable the recovery and reuse of the accumulated oil at the bottom of the oil mist separator located at the outlet of the main oil tank’s exhaust fan. After the modification and commissioning, observations showed that there was no significant change in the oil quality. During the operation of the steam turbine, the oil automatically flows back to the main oil tank via the newly installed pipeline, thereby preventing pollution to the atmospheric environment. This has improved both the economic efficiency and environmental friendliness to a certain extent; it has also enhanced the oil mist separation efficiency and reduced the workload associated with oil replenishment.