Square Shape 125Y Structured Packing In Tail Gas Treatment

Square shape 125Y structured packing used in tail gas treatment

Geometric parameters of metal structured packing layer

Corrugated packing is widely used in structured packing. Its geometric parameters are generally characterized by the geometric structure and characteristic size of the corrugated sheet, which is the monomer of the packing layer.

① Peak height h
② Wave distance 2B
③ Tooth apex angle ξ
④ Inclination angle of corrugation
Generally, the B ≈ h and ξ of corrugated packing are 75 - 90, 78 - 81, φ = 45 (Y type), 30 (X type).
⑤ The hydraulic (or equivalent) diameter DH is used to characterize the size of the fluid channel of the regular packing unit, which can be derived according to the rules of fluid mechanics
DH=
⑥ Specific surface area. The sum of geometric surface area of filler in unit volume packing layer, unit m2 / m3.
Alpha =
⑦ Porosity ε is the volume of void in a unit volume of filler layer, or the fraction of void volume (free space) in the volume of filler layer. ε = 1 - α δ / 2, where δ is the thickness of corrugated plate (or net), unit: M.
⑧ Bulk density ρ P, the mass (or weight) of filler per cubic meter of packing layer, unit: kg / m3.
ρ P = (1 - ε) ρ m, where ρ m is the density of filler material, kg / m3.

Metal structured packing is made of a thin metal plate being punched and corrugated. As there are many small spines due to surface pitting, the separation efficiency are improved with prolonged retention time on the surface and more sufficient exchange of vapor and liquid drop. The diameter of the punched hole is 4 ~ 5mm, which is usually made of ultra-low carbon corrosion resistant stainless steel material, used for oil industry, fine chemical industry, pharmaceutical equipment, etc.

Applications of metal structured packing:

1. In ethylbenzene/styrene separation, after a sieve tray column was revamped with corrugated orifice packing. Under the same overhead operating pressure, the pressure of the reactor decreased from 32000 Pa (320 mbar) to 13500 Pa (135 mbar), and the pressure drop decreased from 24700 Pa (247 mbar) to 6200 Pa (62 mbar), the temperature of the reactor decreased from 104 to 83 degrees, and the reflux ratio decreased from 9 to 6.5. The treatment capacity increased from 16500 kg/h to 28300 kg/h (increased by 70%), the degree of polymerization decreased from 0.5% to 0.1%, and the steam required per ton of product decreased by 25%. The remarkable effect of increasing production and saving energy was achieved.
2. A 6500 t/a atmospheric distillation unit was revamped with orifice corrugated packing for propylene oxide separation.
3. Revamping of Lubricating Oil Vacuum Fractionation Tower, Replacing Tower Plate with Orifice Plate Corrugated Packing and Cascade Mini Ring.
4. Gas oil vacuum distillation column uses corrugated orifice plate structured packing instead of random packing.
5. Replacing original plate tray with corrugated packing of orifice plate in ethylene water quenching tower.
6. Ethylene/ethane high pressure distillation column was reformed with corrugated packing of orifice plate.
7. Cyclohexanone / Cyclohexanol Separation Column with Regular Packing with Corrugated Pore Plate
8. DMT Separation Tower, uses Corrugated Plate structured packing instead of Random Packing

Hualai structured packing products list (part):

Packaged metal structured packing in the workshop

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