PTFE Lined Industrial Rectification Column

PTFE Lined Industrial Rectification Column belongs to heavy-duty industrial fractionation equipment, differentiated from small-size lab-oriented distillation columns. It is built for long-run continuous industrial rectification rather than intermittent small-batch purification. Under industrial working conditions, mixed corrosive steam and condensed liquid conduct counter-current mass transfer inside tower sections to realize component grading separation. The carbon-steel shell bears overall mechanical load, while seamless PTFE lining isolates hot corrosive steam from metal substrate, preventing shell corrosion and metal ion contamination of fractionated products. Modular segmented tower-section structure simplifies road transportation and on-site assembly, widely deployed in industrial parks for solvent regeneration and corrosive medium separation.

Working Principle

This industrial rectification tower completes component separation relying on gas-liquid counter-current mass-transfer principle, combined with dual-layer anti-corrosion structural design:

1. Structural material principle

· Outer shell: Q345R pressure-vessel carbon steel shell, bear internal pressure, external wind load and the weight of tower internals; segmented modular tower-sections are connected by anti-corrosion full-PTFE-lined flanges.

· Inner barrier: Sodium-activated PTFE sheet is tightly bonded to tower inner wall via vacuum lamination. PTFE maintains stable chemical inertia when exposed to high-temperature acid, alkali and fluorine-containing steam, stopping corrosive vapor from contacting steel shell.

2. Industrial rectification process logic

Heated mixed medium generates vapor and enters bottom section of rectification column. Hot vapor rises upward; condensed reflux liquid flows downward. Inside packing or tray internals, vapor and liquid fully contact for repeated vaporization-condensation exchange. Different components with different boiling points are separated and collected from top and bottom outlets respectively. The whole tower runs under continuous circulating status to meet large-volume industrial separation demands.

Core Product Advantages

1. Heavy-Duty Continuous-Run Industrial-Oriented Design Optimized for long-term non-stop industrial cycle operation, strengthen flange connection and lining bonding performance, adapt 24h continuous rectification in industrial park production lines.

2. Modular Segmented Tower-Section Construction Split into multiple standard tower sections, solve the transportation restriction of ultra-high tower body; users can increase or reduce tower sections later according to upgraded separation-precision requirements.

3. Full-Area Steam-Contact Anti-Corrosion Protection Not only tower inner wall, all internals supporting rings, nozzle openings and connecting flanges adopt full PTFE lining; avoid local corrosion damage caused by high-temperature corrosive steam at structural gaps.

4. Flexible Configurable Tower Internals Support random packing, structured packing and multi-stage liquid redistributors. Adjust internals configuration to balance separation efficiency and actual industrial processing capacity.

5. Good Compatibility For Variable Operating Conditions Stable performance under atmospheric pressure and moderate negative-pressure rectification, adapt boiling-point difference separation of multiple corrosive mixed components.

6. Whole-System Matching Compatibility HG20536 unified anti-corrosion flange standard, can seamlessly dock with PTFE lined reboiler, reactor, receiving tank and condenser for complete industrial rectification loop.

Complete Technical Specification Table

Main Application Fields

Focused on large-volume industrial continuous separation scenarios, delivered to fine-chemical parks, fluorochemical plants and waste-liquid recycling factories across Southeast Asia, Middle East:

1. Industrial waste corrosive solvent recovery & regeneration

2. Fluorochemical mixed component rectification and fraction collection

3. Fine-chemical raw material continuous purification and component separation

4. Environmental project: separation of organic ingredients from corrosive waste liquid

5. New-energy auxiliary solvent purification and recycling

6. Petrochemical corrosive auxiliary agent fraction processing

Operation Precautions

1. Steam medium restriction: Only molten alkali metal and chlorine trifluoride will erode PTFE lining; confirm steam composition before startup, avoid unknown mixed corrosive vapor long-time operation.

2. Temperature change control: Prevent sharp temperature shock. Heating / cooling rate should not exceed 12℃ per hour, to avoid thermal stress leading to lining local delamination.

3. Vacuum operation limit: Do not exceed -0.08MPa maximum vacuum degree; excessive negative pressure will raise risk of lining peeling.

4. Internals protection: Prevent hard metal fragments falling into tower body during installation and overhaul; sharp hard debris will scratch PTFE lining surface.

5. Load limit: Do not overweight stacking of internals; strictly follow design load of tower-section supporting ring, prevent lining squeezing damage.

6. Prohibited on-site modification: Do not weld, drill or cut tower shell on site. Any reconstruction must obtain confirmation from Zhuoyan technical department.

Routine Maintenance Guide

1. Periodic lining inspection: Conduct full-wall spark leakage scanning every 8-12 months. Emphasis inspection for tower-section flange joints, nozzle positions which bear repeated steam scouring.

2. Internal cleaning: Stop equipment and cool down completely before opening manhole. Adopt soft cleaning tools and compatible solvent rinse tower internals and inner wall; steel wire brush or hard scraper are forbidden.

3. Flange sealing maintenance: Check PTFE gaskets of segmented connecting flanges quarterly. Replace aging and deformed gaskets timely to prevent steam leakage at joints.

4. Tower internals overhaul: Take out packing and redistributor for cleaning during annual shutdown maintenance; remove coking and medium deposits to guarantee mass-transfer efficiency.

5. Outer shell protection: For outdoor installed rectification column, inspect anti-rust paint condition every 2 years; repair peeling paint to protect carbon-steel shell from atmospheric corrosion.

6. Spare parts management: Reserve matching PTFE gaskets and lining-protected internals accessories; ordinary metal spare parts cannot replace anti-corrosion matching components.

FAQ

Q1: Can this PTFE Lined Industrial Rectification Column run for long-term 24-hour continuous industrial rectification?

A: Yes, this tower is optimized for industrial non-stop cycle operation, suitable for large-scale park-level solvent separation projects.

Q2: Can we add or reduce tower-sections later to adjust separation precision?

A: Adopt modular segmented design. New tower-sections can be increased or removed on-site to adjust effective separation height according to later-stage process upgrade.

Q3: Is the rectification column applicable for fluorine-containing hot steam separation?

A: It can work for fluorine-containing steam after upgrading to 4mm thickened PTFE lining; please provide steam composition for our technical evaluation in advance.

Q4: What shall we pay attention to during on-site installation of segmented tower sections?

A: Strictly protect flange PTFE lining surface from scratch; use matching PTFE gaskets, follow specified bolt tightening torque requirement.

Q5: Can you provide complete matching equipment including reboiler, lined reactor and receiving tank?

A: Unified anti-corrosion flange standard, supporting one-stop procurement for full industrial rectification production line set.

Q6: What is the official warranty scope for industrial rectification column?

A: Carbon-steel shell 10-year structural warranty; PTFE lining 5-year warranty (exclude artificial scratch, impact and mis-operation damage); tower internals accessories 2-year warranty.