There are two types of packing with different peak heights in the same tower section
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Has anyone else seen packing inside a column that has two or more different peak heights? What’s the specific use of it! Let’s discuss together
Take the sofa for yourself. . . . Hasn’t anyone seen it?
This is called mixed packing; our company uses this method for regular packing. Our process involves tightening the upper part and loosening the lower part, which improves separation efficiency and reduces pressure drop, with quite noticeable results.
Could you be more detailed? What exactly does it mean to tighten the top and loosen the bottom?
This specific manufacturing process is a **patent** that our company has just applied for; it needs to be kept confidential. I’m sorry, even our company’s clients only know the general details about it； If there is interest in cooperation, our company will provide experts to offer guidance on processes and on-site installation until the system is put into operation.
Oh my god, this can even be patented. . I recently went to a company for technical support; the tower in question was built by our company over 10 years ago, and it contains various types of fillers. The person who designed this tower has left the company, so it’s really inconvenient to get in touch with him.
Mixed-type towers, right? There are multiple types, with high, medium, and low configurations; generally, the upper part has a high specific surface area while the lower part has a low specific surface area. For example, below uses bulk packing, followed by an orifice plate, then 500-type wire mesh corrugation, and then 700-type; on top, there is double-layer wire mesh corrugation or Ceta rings.
Mixed packing is used in many places; for example, in the vacuum towers of atmospheric and vacuum distillation units. The packing at the bottom of the tower is 125Y type, while 250Y type packing is used in the middle and upper sections. In the heat exchange sections, mixed packing made of 125Y or 175Y type packing is employed. The gas-liquid load requirements vary depending on the different sections, which in turn determines the required specific surface area of the packing as well as its flow rate； There are also many cases where the same tower section uses different types of packing; for example, in extraction towers, random packing is placed beneath structured packing. The functions of structured packing and random packing differ – random packing serves to separate substances, while structured packing helps to support the random packing as well as facilitate sedimentation and redistribution.