What filler should be used to absorb hydrocyanic acid with formaldehyde?

The design unit determines the specification of the filler at the time of design. The selection of filler specification refers to the nominal size or specific surface area of the filler. (1) Selection of bulk packing specifications: The commonly used bulk packings in industrial towers include specifications such as DN16, DN25, DN38, DN50, and DN76. For similar packing materials, the smaller the size, the higher the separation efficiency; however, this leads to increased resistance, reduced flow rate, and significantly higher costs for the packing material. The use of large-sized packing in small-diameter columns leads to poor liquid distribution and severe wall flow, thereby reducing the separation efficiency of the column. Therefore, a specification must be set for the ratio of the tower diameter to the packing size; generally, the ratio D/d of the tower diameter to the nominal diameter of the packing should be greater than 8. (2) Selection of the specifications for structured packing: There are many ways to denote the models and specifications of structured packing used in industry. In China, the specific surface area is commonly used as a parameter; the main specifications include 125, 150, 250, 350, 500, 700, etc. For structured packing of the same type, the greater the specific surface area, the higher the mass transfer efficiency. However, this leads to increased resistance, reduced flow rate, and a significant rise in the cost of the packing. When selecting, a comprehensive consideration of factors such as separation requirements, flux requirements, site conditions, material properties, as well as equipment investment and operating costs should be taken into account, so that the selected packing can meet the technical requirements while also being economically reasonable. It should be noted that a packing tower can use packing of the same type and specification, or it can also use packing of the same type but different specifications ； The same type of filler can be used, or a different type of filler can also be chosen ； Some tower sections can use structured packing, while others can use random packing. Flexibility should be exercised during design, and the specifications of the filler should be selected in accordance with the principle of integrating technology and economics.

Use 316L Pall ring packing; never use ceramic packing

What’s wrong with the ceramic filler? Why can’t it be used?

A vertical sieve plate tower can be used; we specialize in manufacturing equipment for the absorption of formaldehyde and hydrogen cyanide to produce hydroxyacetonitrile, and 12 theoretical plates are sufficient for this purpose.