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Liquid content at demister outlet

2017-02-18View Original

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I came across a post occasionally at http://bbs.hcbbs.com/thread-1354814-1-1.html, which states that the liquid content in the gas exiting the demister can be kept below 0.01 kg/1000 Nm3 (i.e., the mass fraction)
Reply #22017-10-07
It mainly depends on whether the demister design is carried out using a systematic platform that incorporates dynamic gas-liquid separation calculations and precise configuration design. Due to gas-liquid separation, which is a purely kinetic separation technique, the design of such demisters must be carried out through precise kinetic gas-liquid separation calculations and configuration design of the system platform; it cannot rely on traditional empirical design methods based on rough estimates or arbitrary decisions. For the same demister internals, different installation positions inside the container result in varying separation efficiency and operational stability. If the demister design is carried out using a precise system platform based on dynamic gas-liquid separation calculations and configuration design, in general, wire mesh demisters cannot achieve precise quantitative size separation; their overall separation efficiency is around 95-98%. Multi-stage, multi-layer wire mesh demisters can achieve efficiencies of 98.5% or even 99% ; The feather-leaf high-efficiency gas-liquid separator enables precise quantitative size separation, with a separation efficiency of at least 3N level, and even up to 5N level; the precision of quantitative size separation reaches 5-10 microns. The specific separation accuracy and dimension data can be accurately obtained through dynamic gas-liquid separation calculations and systematic configuration design, by relying on parameters such as operating pressure, operating temperature, gas flow rate, gas composition, gas viscosity, gas density, foam composition, foam density, foam viscosity, and foam surface tension. The kinetic gas-liquid separation calculation report will accurately and completely reflect these core parameters, and provide key information such as curves showing changes in separation efficiency and operating pressure drops.
Reply #32017-10-08
The cases mentioned in the post are only individual examples; in fact, the demisting efficiency of a demister depends not only on the physical and chemical properties of the gas-liquid mist but also on the structural characteristics of the demister’s design. It can’t be simply put into words.

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