Boron ring packing in place of wire mesh demister

Generally, fillers are used for mass and heat transfer, etc. Is this demister meant to remove water? To describe in more detail, what are the components of the medium? What material is used for the current screen-type demister? What is the structural design of the tank – horizontal or vertical?

Yes, the process of using packing rings to eliminate foam and bubbles is quite traditional.

The screen pressure is low, the demisting effect is good; fillers similar to Pall rings can also be used in theory.

The mesh can be shaped however you like! Let’s see what medium is used for degassing!

As mentioned by the original poster, for the steam from the tank top to be sent to the steam compressor, it is necessary that the steam entering the compressor has its liquid droplets, foam, and dissolved salts and alkalis effectively removed. As the original poster mentioned, if steam, along with the liquid droplets and foam it carries, as well as the dissolved salts and alkalis, cause severe corrosion to the wire mesh demister, this may lead to deposition crystallization corrosion and blockages; in such cases, it is advisable to consider using a baffle-type high-efficiency demister first. The feather-leaf demister enables precise, quantitative, and efficient demisting within a wider range of operational flexibility, representing a technological upgrade over traditional screen-type, fiber-type, and filter-element-type demisters. Packed demisters are not recommended. Packing is suitable for applications where efficient mass transfer occurs through thorough mixing and contact between the gas and liquid phases; however, it performs poorly, or even has the opposite effect, in applications such as foam removal where thorough mixing between the gas and liquid phases should be avoided as much as possible. If Pall ring packing is used, although the operating pressure drop is reduced and the anti-clogging performance is improved, the demisting efficiency is lower than that of a mesh demister. It is highly not recommended to use Pall ring packing; it is essential to choose professional internal components based on dynamic gas-liquid separation and foam removal technologies, rather than making arbitrary choices. Steam demisting separation definitely belongs to the category of kinetic separation technologies. Reliable and precise separation can only be achieved through demisting separation components that have been designed using specialized computational methods for kinetic gas-liquid separation, as well as through a dedicated system platform for such design. Furthermore, for the same demister internals installed at different positions within the same separation tank, the demisting and separation efficiency varies due to differences in the air flow field and flow pattern contraction. This is one of the main reasons why a demisting separation internal component solution must be developed through a specialized computational design and configuration system platform for dynamic gas-liquid separation.

For defoamers, you can choose materials that are resistant to corrosion; these can be metals such as 316L, Monel alloy, 904L, or polytetrafluoroethylene.

Agree with #9: Priority should be given to replacing the demister with a stainless-steel version. The wire mesh demister was chosen in the original design, and various factors must have been taken into consideration. Location, space, installation. . . Replacing the screen with filler rashly not only requires partial modifications to the equipment’s structure, but it may also backfire despite good intentions.