【Q&A】May 23, 2017
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Question: What is mist entrainment? What harm does it cause to the operation? Answer: As the gas velocity increases, the phenomenon in which mist droplets are carried to the upper tray is called mist entrainment. If the amount of mist entrained from the lower trays to the upper trays is 10 percent, the operation of the tower becomes abnormal, with the result being an increase in the concentration of heavy components at the top of the tower and an increase in tower pressure. http://bbs.hcbbs.com/static/image/hrline/4.gif HaiChuan Network’s special May Day event, “Remembering the Glorious Moments,” warmly invites your participation. http://bbs.hcbbs.com/thread-1774529-1-1.html (Source: HaiChuan Chemical Forum) Summary post for HaiChuan Network’s special May Day event, “Remembering the Glorious Moments.” http://bbs.hcbbs.com/thread-1774532-1-1.html (Source: HaiChuan Chemical Forum) First round of voting for the creative ideas contest (use your mouse to influence the results). http://bbs.hcbbs.com/thread-1776507-1-1.html
When the temperature is too high, a coexistence of vapor and liquid occurs, which results in the product being unsuitable
Foam entrainment refers to the phenomenon where, as the tower pressure increases, the material is carried to the upper tray. When the mist entrainment amount is 10%, the concentration of the Reorganization components at the top of the tower increases, and the tower pressure rises.
When gas bubbles form within a liquid, it inevitably carries many liquid droplets as it passes through the liquid layer; those droplets that cannot be separated in time are carried up to an upper tray by the turbulence. This phenomenon is known as \"foam entrainment.\" Foam entrainment often leads to a decrease in the efficiency of the trays. The factors affecting this phenomenon include: ① the volume of material being processed – as the processing volume increases, the gas load also increases, the gas velocity inside the tower rises, and foam entrainment becomes more severe. ②The tray spacing cannot be too small, otherwise the amount of mist entrained will also be high. ③Tray structure: A good tray structure can control the amount of mist entrainment.
Mist entrainment refers to the phenomenon where the liquid on the tray is carried by the airflow in the form of mist droplets to the upper tray. It will lead to an increase in the heavy components at the top of the tower
In the operation of a tray-type distillation column, the gas phase passes through the rising holes, and the liquid that overflows the inlet weir causes intense mixing, resulting in bubble or foam layers; the heat and mass transfer between the gas and liquid phases primarily take place within these foam layers. When the gas phase comes into contact with a liquid and leaves the liquid layer, it often carries some liquid droplets upward; this phenomenon is known as mist entrainment. Foam entrainment causes low-volatility liquids to enter liquids with higher volatility, reducing the efficiency of the tower plates; it also carries non-volatile impurities upward to the top of the tower, leading to product contamination.
As the gas velocity increases, the phenomenon in which mist droplets are carried to the upper tray is called mist entrainment. If the amount of mist entrained from the lower trays to the upper trays is 10 percent, the operation of the tower becomes abnormal; this results in an increase in the concentration of heavy components at the top of the tower and an increase in the tower pressure
As the gas velocity increases, the phenomenon in which mist droplets are carried to the upper tray is called mist entrainment. If the amount of mist entrained from the lower trays to the upper trays is 10 percent, the operation of the tower becomes abnormal, with the result being an increase in the concentration of heavy components at the top of the tower and an increase in tower pressure.
Foam entrainment refers to the phenomenon where, as the tower pressure increases, the material is carried to the upper tray. When the mist entrainment amount is 10%, the concentration of the Reorganization components at the top of the tower increases, and the tower pressure rises.
As the gas velocity increases, the phenomenon in which mist droplets are carried to the upper tray is called mist entrainment. If the amount of mist entrained from the lower trays to the upper trays is 10 percent, the operation of the tower becomes abnormal, with the result being an increase in the concentration of heavy components at the tower top and an increase in tower pressure.
As the gas velocity increases, the phenomenon in which mist droplets are carried to the upper tray is called mist entrainment. If the amount of mist entrained from the lower trays to the upper trays is 10 percent, the operation of the tower becomes abnormal, with the result being an increase in the concentration of heavy components at the top of the tower and an increase in tower pressure.