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700Y SS316L Diameter 3200mm Distillation Structured Tower Packing
1. Hualai structured packing in high vacuum distillation column.
1) The surface area per unit volume of structured packing should be
large;
2) The free volume of the liquid phase in contact with the gas
phase must be large;
3) The resistance to steam should be small (i.e. the
cross-sectional area of the gap should be large);
4) Chemical resistance to both liquids and vapors;
5) The density should be small;
6) The price per unit of effective area should be small
2. Hualai structured packing options
| Item | Unit | 125X | 125Y | 250X | 250Y | 350X | 350Y | 500X | 500Y | |
| corrugation height h | mm | 24.0 | 11.5 | 8.4 | 6.0 | |||||
| corrugation inclination θ | (°) | 30 | 45 | 30 | 45 | 30 | 45 | 30 | 45 | |
| corrugation distance 2B | mm | 39.6 | 19.0 | 14.0 | 9.9 | |||||
| corrugation angle β | (°) | 79.0 | 79.1 | 79.6 | 79.0 | |||||
| void fraction ε | δ=0.15mm | % | 99.4 | 98.6 | 98.0 | 97.2 | ||||
| δ=0.12mm | % | 99.5 | 98.9 | 98.4 | 97.8 | |||||
| δ=0.10mm | % | 99.6 | 99.1 | 98.7 | 98.2 | |||||
| Perforated hole diameter d0 | mm | 4.5 | 4.5 | 4.0 | 4.0 | |||||
| Opening rate σ | % | 8.5-9.5 | 8.5-9.5 | 9.0-10.0 | 9.0-10.0 | |||||
| radius of curvature of the top circle of corrugation angle R | mm | ≤2.0 | ≤1.4 | ≤0.9 | ≤0.5 | |||||
Note: The influence of opening rate on the plate is not calculated
3. Balance operation of vapor and liquid in packed tower
Vapor liquid equilibrium mainly reflects the quality and loss of products. It is achieved by adjusting the operating conditions (temperature and pressure) of the tower and the gas-liquid contact on the tray. Only when the temperature and pressure are fixed, can the composition of vapor-liquid equilibrium be determined. When the temperature and pressure change, the composition determined by vapor-liquid equilibrium will change, and the product quality and loss will change. The gas-liquid phase equilibrium is closely related to the material balance. If the material balance is well controlled, the rising steam speed in the tower is appropriate, and the gas-liquid contact is good, the heat and mass transfer efficiency is high, and the tray efficiency is also high. Of course, temperature and pressure will also change with the change of material balance.
4. Classification of distillation packing
Packed tower is a kind of gas-liquid mass transfer equipment with a
large number of packings in the tower. Packed column was used in
industrial production in the middle of the 19th century. Since
then, it has developed with plate column, forming two different
types of gas-liquid mass transfer equipment.
The body of the packed tower is a vertical cylinder with a
supporting plate at the bottom. The packing material is placed on
the support plate in a integral way. A packing pressing plate is
installed above the packing to limit the movement of the packing
with the updraft. The liquid is added from the top of the tower,
sprayed onto the packing through the liquid distributor, and flows
down the packing surface. The gas is sent from the bottom of the
tower and distributed by the gas distribution device (gas
distribution device is generally not set for small diameter tower),
then it is countercurrent with the liquid and continuously passes
through the gap of the packing layer. The gas-liquid two-phase is
in close contact with the packing surface for mass transfer. Packed
tower is a continuous contact gas-liquid mass transfer equipment,
the two-phase composition changes continuously along the tower
height. Under normal operation, the gas phase is continuous phase
and the liquid phase is dispersed phase.
In Hualai, every year we manufacture and supply hundreds of cubic meters of metal structured packing in different models. There are many popular types and materials for option. Custom order is welcome, too! We are happy to help with what you need!
