🏭 Chlorine Drying Tower – Full System Breakdown

🔹 1. Chlorine Drying Tower Overview

• A vertical packed column or tower used to dry wet chlorine gas using concentrated sulfuric acid (H₂SO₄).

• Critical in chlor-alkali plants, PVC manufacturing, and chemical industries.

🔹 2. Piping System

• Chlorine inlet/outlet piping (Cl₂ gas is highly corrosive).

• Acid recirculation piping (glass-lined, PTFE-lined, or Alloy-20).

• Vent piping, drain lines, purge lines, gas sampling lines.

🔹 3. Civil Foundation

• RCC pad foundation with chemical-resistant lining.

• Anti-settlement and seismic design.

• Separate containment pits for acid handling areas.

🔹 4. Pumps

• Sulfuric acid circulation pumps (magnetic drive or PTFE-lined).

• Emergency transfer pumps.

• Seal-less designs preferred due to corrosion.

🔹 5. P&ID (Piping & Instrumentation Diagram)

• Shows chlorine gas flow, acid circulation, pumps, acid tank, instrumentation (level, flow, pressure), interlocks, valves.

🔹 6. Related Heat Exchangers

• Typically not used inside the tower, but:

  • External acid cooling with graphite or PTFE heat exchangers.

  • Cl₂ gas may require cooling after compression before entering tower.

🔹 7. Instrumentation

• Pressure transmitter (for tower pressure control).

• Temperature sensors (inlet/outlet).

• H₂SO₄ level indicators and flow meters.

• HCl/Cl₂ leak detection, emergency shutoff interlocks.

• Conductivity or pH sensors for acid monitoring.

🔹 8. Related Day & Temporary Storage Tanks

• Day Tank: For sulfuric acid storage with recirculation.

• Temporary Storage Tanks: Emergency acid catchment tanks; PTFE-lined or HDPE tanks for safe disposal.

🔹 9. Process Design

• Design for chlorine drying capacity (kg/hr or Nm³/hr).

• H₂SO₄ concentration (typically 98%).

• Acid contact time, mass transfer efficiency.

• Pressure drop across packed bed.

• Tower packed height and diameter based on vapor-liquid equilibrium.

🔹 10. Mechanical Design

• Vertical column design per ASME Section VIII, Div. 1.

• Material selection: Alloy-20, PTFE-lined CS, or FRP, depending on cost and safety.

• Nozzle loading, corrosion allowance, design for vacuum and pressure.

🛢️ 20 Application-Based Surge Tank Names (Chlorine/Chemical Industry)

1. Chlorine Compressor Surge Tank

2. Chlorine Liquefaction Surge Vessel

3. Sulfuric Acid Circulation Surge Tank

4. Acid Dilution Surge Tank

5. Chlorine Buffer Surge Drum

6. Chlor-Alkali Plant Gas Surge Tank

7. Acid Vent Header Surge Tank

8. Absorber System Surge Tank

9. Chlorine Off-Gas Surge Tank

10. Neutralization Surge Vessel

11. Tail Gas Surge Drum

12. HCl Scrubber Surge Tank

13. Emergency Dump Surge Tank

14. Wet Chlorine Feed Surge Tank

15. Tower Drain Surge Tank

16. Vacuum Breaker Surge Drum

17. Reboiler Return Surge Tank

18. Gas Collection Header Surge Tank

19. FRP Surge Vessel for Acid

20. Hypochlorite Reactor Surge Tank

🛠️ 20 Consultancy Services You Can Offer for Chlorine Drying Towers

1. Custom Mechanical Design of Chlorine Drying Towers

2. Material Selection Advisory (PTFE, Alloy-20, FRP)

3. ASME Code Vessel Design Calculations

4. Tower Packing Design & Selection (Random/Structured)

5. Process Simulation & Mass Transfer Analysis

6. CFD Analysis for Gas Flow in Towers

7. Sulfuric Acid Recirculation System Design

8. Tower Internals & Distributor Design

9. Stress & Nozzle Load Analysis (WRC/FEM)

10. Acid Tank & Pump Skid Layout Design

11. Instrumentation & Control Logic Development

12. Corrosion Study & Lining Specification

13. Tower Foundation & Civil Design Services

14. Explosion Venting & Relief System Design

15. P&ID Generation & Interlock Diagrams

16. 3D Modeling of Tower System in CAD/SolidWorks

17. Hazard & Operability Study (HAZOP) Support

18. Startup & Commissioning Technical Support

19. Retrofitting Existing Tower for Capacity Upgrade

20. Design Audit & Third-Party Review Services