Technical Parameters of Stainless Steel Column/Towers and Internals

Structure

•mainly consists of cylinder, head (or cap head), support and tower inner parts, including liquid distributor, packing support device, gas distributor, defoamer and so on.

Working principle

•mainly used to realize the mass and heat transfer process between gas-liquid or liquid-liquid, to complete a variety of chemical unit operations: such as distillation (for the separation of liquid mixtures) , to separate hydrocarbons in petroleum refining of different boiling points; such as absorption (for gas purification or separation) to absorb hazardous gases in the treatment of waste gases; such as desorption, to be used to re-release the absorbed gas; and extraction (for liquid-liquid separation) , to separate organic matter from the aqueous phase in chemical production.

Advantages

• o Highly efficient mass and heat transfer: by optimizing the design of tower internals, the gas-liquid contact area can be significantly increased, enhancing the mass and heat transfer efficiency.
• o High operating flexibility: it can be adapted to different operating conditions, such as flow rate and temperature changes.
• o Customized design: can be customized according to user needs to meet specific process requirements.

1.Tower Main Body

Material Standards:

• o Tower Material: 304/316L/2205 duplex steel, thickness 6–50 mm
• o Design Standards: ASME SEC VIII DIV.1, GB150, EN13445
• o Corrosion Allowance: 0–3 mm (determined by medium corrosiveness)

Design Parameters:

• o Design Pressure: -0.1–4.0 MPa (vacuum to medium pressure)
• o Design Temperature: -196–400°C (low to high temperature)
• o Tower Diameter Range: DN500–DN8000 (customizable)
• o Tower Height Range: 10–80 m (depending on process requirements)

Structural Types:

• oVertical Tower: Common structure, small footprint
• o Horizontal Tower: For special processes, e.g., reactive distillation
• o Packed Tower: Suitable for high-efficiency separation
• o Tray Tower: Suitable for high liquid load

2.Tower Internals

Tray Types:

Packing Types:

• o Random Packing: Pall rings, cascade rings, saddle rings, etc.
• o Structured Packing: Wire mesh corrugated, sheet corrugated, etc.
• o Materials: 304/316L/ceramic/plastic, etc.

3.Manufacturing and Inspection

Manufacturing Requirements:

• o Tower Straightness: ≤1/1000 and ≤20 mm
• o Tower Section Alignment: Misalignment ≤10% of wall thickness
• o Internal Installation: Levelness ≤±2 mm

Inspection Requirements:

• o Nondestructive Testing: RT/UT/PT/MT (as per standard requirements)
• o Pressure Test: Hydraulic test, tightness test
• o Cleanliness: Determined by process requirements

4.Application Fields

• o Petrochemical Industry: Crude oil fractionation, catalytic cracking, alkylation, etc.
• o Fine Chemicals: Solvent recovery, product purification, etc.
• o Environmental Protection: Exhaust gas absorption, wastewater treatment, etc.
• o Pharmaceutical and Food Industries: Essential oil extraction, alcohol distillation, etc.

5.election Points

• o Process Conditions: Throughput, composition, temperature, pressure, etc.
• o Separation Requirements: Product purity, recovery rate, etc.
• o Equipment Configuration: Reboiler, condenser, reflux drum, etc.
• o Control Scheme: Temperature, pressure, level control, etc.