Residual oil mist separation and recovery device in oil mist lubrication and its application

Abstract

The invention relates to a residual oil mist separation and recovery device in oil mist lubrication and its application, which includes: two-stage residual mist processor, connecting pipeline, oil mist inlet pipeline, and flue gas pipeline; the rotary spiral processor includes: Upper housing, lower housing, motor, final discharge microporous membrane filter, primary microporous membrane filter, impeller. The residual oil mist separation and recovery device in oil mist lubrication of the present invention can recover the residual mist of oil mist lubrication below 5um. Using the separation and recovery device can effectively reduce air pollution and other safety hazards, and its residual mist treatment rate reaches 98%. above, and the emission concentration is not greater than 0.006g / m 3 ; In addition, the device of the present invention has a simple structure and is easy to separate and recycle.

Description

technical field [0001] The invention relates to an oil mist recovery device, in particular to a residual oil mist separation and recovery device in oil mist lubrication and its application. Background technique [0002] Oil mist lubrication technology uses the energy of compressed air to atomize liquid lubricating oil into small particles of 1um-5um, suspend in compressed air to form a mixture (oil mist), and pass through the transmission pipeline under its own pressure energy , delivered to each required location. During the atomization process of lubricating oil, about 5% of the oil mist particles smaller than 1um exist. Due to the low condensation ratio of these ultra-small particles of oil mist, most of them are discharged with the residual mist. [0003] For the oil mist particles of 1um-5um, after being condensed by the condensation nozzle, they have been condensed into large particles of oil mist to participate in lubrication and less escape. Therefore, more than 90%...

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Problems solved by technology

[0009] In the prior art, the recovery of residual oil mist usually adopts the method of air induction device combined with medium filtration to make the oil mist pass through multiple layers of filter media with different effects. The ability to combine with oil is strong. With the deposition of particles in the inhaled oil mist, oil dirt will be formed together with the oil to block the filter layer, which is difficult to clean, and the air flow capacity will gradually decrease, and the filtration efficiency will drop rapidly; (2) The maintenance cost is high, due to the pollution The clogging of objects requires frequent cleaning of the filter screen (such as cleaning the coarse filter screen) and replacement of the fine filter screen (disposable material). The daily maintenance and replacement costs are high, and the maintenance cost of personnel is increased at the same time; (3) The oil mist recovery efficiency is low, Commonly used filter materials can only filter oil mist particles above 5um, and most of these particles are various forms of colloidal particles, semi-colloidal particles, and heterogeneous impurity particles, some of which are even larger than 20 μm, which can easily block the pores of the filter medium

For oil mist particles below 5um, due to the effect of surface tension, the particles often show pseudoplastic characteristics, making it extremely difficult to filter. Usually, the filter material with a filtration accuracy of 0.5um cannot filter oil mist particles with a particle size of 1um, while 65% of the residual oil mist in the oil mist lubrication system is oil mist particles with a particle size of about 1um

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