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Advantage：
● Reduced pressure drop
● Increased plant capacity
● Improved resistance to "fouling"
● Higher operational efficiency
Metal cascade mini ring is made of material like carbon steel, stainless steel or Aluminum alloy, etc. The product has features such as thin wall, heat resistant, high free volume, high capacity, low resistance, high separation efficiency and so on. It is especially suitable for rectification towers under vacuum to treat thermo sensitive, decomposable, polymerizable or cokable systems, so it is widely used in packing towers in petrochemical industry, chemical fertilizer industry and environmental protection, etc.
Geometric Parameters of China Standard
Dimension
Thickness
Number
Bulk density
Surface area
Free volume
17×6
0.25
530000
347
420
96
25×8
0.3
150000
247
238
96.9
34×11
0.35
61000
208
164
97.4
43×14
0.35
33000
203
160
97.5
51×17
0.4
15700
159
105
98
66×21
0.4
10140
165
108
97.9
86×28
0.4
4310
120
78
98.5
(mm)
(mm)
per m3
(kg/m3)
(m2/m3)
(%)
The above data is reference to material stainless steel (AISI304) in the material thickness shown. Other material available: carbon steel, stainless steel including 304, 304L, 410,316, 316L.
Geometric Parameters of International Standard
Size
Dimension (OD*ID*H*T) mm
Bulk Density kg/m3
Piece per m3
Surface Area m2/m3
Free Volume %
Factor m-1)
0P
17*15*6*0.3
472
530000
427
94
55
1P
25*22*8*0.3
270
150000
230
96
40
1.5P
34*29*11*0.3
201
60910
198
97
29
2P
43*38*14*0.4
230
33170
164
97
22
2.5P
51*44*17*0.4
186
17900
127
97
17
3P
66*57*21*0.4
139
8800
105
98
14
4P
86*76*29*0.4
143
5000
90
98
10
5P
131*118*41*0.6
136
1480
65
98
7
Advantage
● Reduced pressure drop
Reduced Pressure drop occurs because the Cascade Mini Ring has its largest opening predominantly in the direction of the vapor/liquid flow which allows for easy passage, this reduces the pressure drop significantly.
● Increased plant capacity
Increased plant capacity is the direct result of the result of the reduction in pressure drop that Cascade Mini Rings provide, as this moves the operating point further away from the “critical pressure drop point” at which flooding occurs. This is typically 1-2 in., wc/ft or 10-20 mbar/in). This effect allows additional vapor/liquid handling and therefore increases plant capability
● Improved resistance to "fouling"
Improved resistance to fouling results from the directional positioning of the rings,(largest opening in direction of flow ) as any solids entering the packed bed are more easily flushed through the packing matrix.
● Higher operational efficiency
Higher operational efficiency occurs because of the preferential orientation which ensures that in most of the ring surface are positioned vertically rather than horizontally, and this is also advantageous for mass transfer. High efficiency is dependent on as much of the available surface area as possible being effectively wetted. The underside of any horizontal surface in a packed bed or tower is naturally shielded from the liquid trickling down and is therefore not fully wetted, such dry surfaces play little or no part in the mass transfer process. Cascade Mini Ring significantly reduces this effect, and therefore gives much higher plant operational efficiency.
