What is the purpose of feeding pure water into the lower part of the [water mist separator]?

Under normal conditions, pure water is not introduced; if pure water is introduced under normal circumstances, it should help prevent impurities from clogging the pipes. It is perhaps used to create a liquid seal while driving, and should be closed once it is formed.

This is determined by the properties and structure of the mist collector; as the name implies, a mist collector is a device used for removing water. It contains filtering cotton inside, and as gas passes through this cotton, the water is trapped. The structure of the water mist collector features an empty bottom, with a partition layer on top of it used to hold the filter cotton. If the filter cotton is not submerged in water at the bottom, gas will pass through directly through the space between the filter cotton elements, bypassing them. Therefore, when the system is first started up, it is necessary to fill the space with water so that the filter cotton can function properly. I don’t have any internal structure diagrams here, so I can’t upload them. You can search for them online; they should be available there.

This is determined by the properties and structure of the mist collector; as the name implies, a mist collector is a device used for removing water. It contains filtering cotton inside, and as gas passes through this cotton, the water is trapped. The structure of the water mist collector features an empty bottom, with a partition layer on top of it used to hold the filter cotton. If the filter cotton is not submerged in water at the bottom, gas will pass through directly through the space between the filter cotton elements, bypassing them. Therefore, when the system is first started up, it is necessary to fill the space with water so that the filter cotton can function properly.

It’s a liquid seal; there is a tube at the bottom of the collector, which is initially empty and can cause a gas-phase short circuit.

This post was last edited by luoli519 on 2015-12-2 at 18:12. The water mist separator mentioned by the original poster is what is known as an air flow demisting device. The water mist separator consists of a housing and internal components. The internal components generally include an inlet fluid separation assembly, fine degassing and demisting components, a liquid dropping system, a level control and discharge system, etc ； The most critical component among them is the precision demisting and defoaming element. Since water mist separators are generally equipped with an automatic liquid level control and discharge system, it is necessary to add a relatively clean liquid (water or liquid material) at the beginning of operation in order to establish a proper liquid level system. Especially in water mist separators equipped with a liquid drainage system, the clean liquid added at the start of operation also serves to create a proper liquid seal, preventing air flow from taking a ‘short circuit’ and simultaneously stopping liquid from experiencing ‘siphoning’. Precision demisting and defoaming internals are generally divided into three categories: traditional simple interception-type demisters, high-efficiency vane-type demisters, and multi-factor swirl separator systems. Traditional simple interception-type demisters, including screen-type, felt-screen type, filter-element type, and multi-media filter media type, remove foam through the pores formed by the bridging of the internal media; these internal elements are arranged horizontally within the separator shell, covering most of the cross-section of the cylinder. The structure of traditional simple interception-type demisters determines their performance as follows: 1. Due to the Gaussian distribution of the pore sizes formed by the bridging of the internal components, the pore diameters vary, which often results in only qualitative or semi-quantitative demisting and separation; such devices cannot meet the quantitative requirements for removing mist particles larger than 10 microns at a 4N level (99.99%). 2. Since the internals are arranged horizontally across the cross-section of the cylinder, and the airflow passes axially from bottom to top through these internals across the entire cross-section to remove foam, the internals that are densely packed across the whole cross-section cannot effectively facilitate optimal liquid phase collection. As a result, such traditional foam removers do not have a dedicated liquid dropping system, nor is it possible to implement an effective liquid collection system in them. The internal components capture and separate the liquid and large droplets formed as a result of air flow; under the influence of gravity, these droplets fall from top to bottom like rain, back into the newly rising air currents, where they are once again carried upward by the air flow for separation. This process of separation, mixing, carrying upward again, and separation once more repeats continuously, resulting in low efficiency. 3. The maximum operating flexibility for such traditional demisters is 110%, but fluctuations in actual operating conditions often cause this maximum flexibility to exceed 110%, leading to liquid surges and a significant decline in separation efficiency. 4. If the airflow also contains viscous gums or catalyst-decomposed particulate matter, not only will the internal components become gradually clogged on their surfaces, but the airflow will also carry these gums and tiny particles into the middle and deeper layers of the internal components, where they get trapped within the fibers and cannot be removed easily. This makes it difficult to achieve optimal regeneration; in such cases, the clogged internal components must be replaced, and sometimes a backup unit is required, resulting in high operational and maintenance costs. The feather-leaf type high-efficiency demister and the multi-factor swirl separator for mother-son separation are upgraded technical devices designed for the aforementioned traditional demisters, which have been adopted in projects at home and abroad over the past two years. It achieves efficient dynamic demisting under complex operating conditions by integrating mechanisms such as the conversion of fluid dynamic momentum and kinetic energy through collisions, the coalescence and growth of liquid droplets, the separation of rotational vectors, and the utilization of the free energy at the liquid surface. The feather-leaf type high-efficiency demister is suitable for removing liquid droplets and mist from air streams with low levels of solid particles or even no solids at all, offering excellent cost-performance. The multi-factor swirl parent-child separator is suitable for removing liquid droplets and mists from air streams with high levels of solid particles, and its cost is higher than that of the vane-type high-efficiency demister. For demisting and defoaming in air streams free of solid particles, a vane-type high-efficiency demister is preferred. These two types of dynamic, efficient demisting and defoaming separators, thanks to their special internal structure and operating principles, can achieve an ideal liquid dropping system for all internal components, thereby preventing secondary mixing after gas-liquid separation. They feature high separation efficiency, the ability to capture and quantitatively separate liquid droplets as small as 4N grade and 8 microns or even smaller, greater operational flexibility, resistance to clogging, and low operating and maintenance costs. It is recommended that everyone visit www.novelenergytech.com to learn about the technical specifications of such high-efficiency demisters as well as their application records both domestically and internationally.