Product Overview
Specialized wet scrubber for chlorine (Cl2) gas removal from industrial exhaust streams. Chlorine is uniquely aggressive — it attacks standard PP through oxidative degradation, causing embrittlement and premature failure. We build Cl2 scrubbers with oxidation-stabilized PP formulated specifically for continuous wet chlorine exposure, validated at inlet concentrations up to 500 PPM. Scrubbing chemistry: Cl2 + 2NaOH to NaOCl + NaCl + H2O.
| Target gas | Chlorine (Cl2) — also co-removes HCl, SO2, H2S if present in mixed exhaust |
| Material | Oxidation-stabilized PP; FRP or SS available for high-concentration service |
| Scrubbing medium | NaOH (caustic soda), 10-20% solution; NaOCl byproduct managed via blowdown |
| Efficiency | over 95% Cl2 removal; discharge under 5 PPM with proper caustic strength |
| Air volume | 100 – 80,000 m3/h single tower; parallel for larger flows |
| Lead time | Standard 15-25 days; special-grade PP may add 5-7 days |
| Warranty | 12 months structure; material warranty with Cl2 exposure documentation |
Why Chlorine Requires a Specialized Scrubber
Chlorine isn’t just another acid gas. In contact with water it forms hypochlorous acid (HOCl) and hydrochloric acid (HCl) — a two-pronged attack: acid corrosion plus oxidative degradation. Standard PP exposed to wet Cl2 above 50 PPM can lose 30-40 percent of its tensile strength within 2-3 years through chain scission of the polymer backbone. An oxidation-stabilized PP formulation adds antioxidant packages and free-radical scavengers that interrupt the degradation chain reaction — the difference in service life is typically 3-5x. For inlet Cl2 concentrations above 500 PPM or combined Cl2 + HF service, we recommend FRP or 316L stainless steel — contact our engineers for a material recommendation specific to your gas analysis.
Read: PP vs FRP Wet Scrubber Comparison
Why Xicheng
16 years, 2600+ systems shipped worldwide. Chlorine scrubbers fail in predictable ways — and we’ve seen them all. The three most common failure modes and how we prevent them:
- Caustic depletion. Cl2 consumes NaOH at roughly twice the rate of HCl on a molar basis. An undersized chemical dosing system can’t keep up, and within hours your scrubbing liquor goes acidic — at which point Cl2 off-gasses from the sump. We size the caustic dosing system for the stoichiometric requirement plus 50 percent margin, with automated pH-controlled dosing that maintains pH above 10.5 at all times.
- Hypochlorite accumulation. The NaOCl byproduct builds up in the recirculation loop. Above 5 percent free chlorine equivalent, it attacks even stabilized PP. We calculate the blowdown rate required to keep NaOCl concentration below the material threshold and include automatic blowdown with conductivity-triggered makeup water as standard.
- Exotherm management. Cl2 absorption into NaOH is exothermic — about 150 kJ per mole of Cl2 reacted. For high inlet concentrations, the scrubbing liquor temperature can rise 10-15 C across the tower. We include a heat exchanger or cooling coil in the recirculation loop when the calculated adiabatic temperature rise exceeds 8 C.
Send your Cl2 inlet concentration and air volume to xicheng023@outlook.com. We’ll confirm the right material grade and provide a complete mass balance with the proposal.
Core Advantages
- High Purification Efficiency: Delivers high dust removal and desulfurization efficiency. Effectively removes various industrial organic and inorganic waste gases, including HCL, HF, NH3, H2SO4, CrO3, HCN, NAOH, H2S, and HCHO.
- Durable and Premium Material: Manufactured using new PP material with oxidation-stabilized formulation for aggressive gases like chlorine, offering excellent anti-corrosion and wear-resistant properties, ensuring a long service life and high cost-performance.
- Compact Design and Low Consumption: Features a simple structure that occupies minimal space. Operates stably with low energy consumption.
- Easy Installation and Operation: Improved with a floating packing layer, it is highly practical, easy to install, and simple to operate, making it ideal for acid-base waste gas treatment.
- Flexible Customization and After-Sales Service: Supports personalized customization; sizes and specifications can be adjusted according to customer needs and drawings. Comes with a 1-year warranty, professional installation guidance, and comprehensive overseas after-sales support.
Key Specifications
| Model No. | XC-1 |
| Material | New PP (Polypropylene) Material |
| Function | Waste Gas Treatment (Chemical Treatment) |
| Purifying Technology | HEPA |
| Automation | Automatic |
| Service Life | 8-10 Years |
| Color | Beige / Dark Grey |
| Environmental Temperature | Normal Temperature |
| Brand / Origin | Xicheng / China |
Certifications and Compliance
- CE Certified – Wet Scrubber, Exhaust Fan, Air Valve
- RoHS Compliant – Adsorption Tower materials
- ISO 9001 – Quality Management System
- ISO 14001 – Environmental Management System
- SGS Tested – PP Sheet, PPS Flame Retardant Sheet, PP Pipe, PPS Flame Retardant Pipe, PVC Sheet
- Design Compliance – Systems designed to meet EU Industrial Emissions Directive (2010/75/EU) and US EPA Chemical Manufacturing NESHAP. Cl2 discharge limits per OSHA Cl2 exposure limits.
Model Selection Table
Standard model range — all dimensions in millimeters. Custom sizes outside this range available on request.
| Air Volume (m3/h) | Diameter (mm) | Thickness (mm) | Drain Outlet | Water Tank (mm) | Inlet/Outlet Pipe | Pump (kW) | Air Resistance (Pa) |
|---|---|---|---|---|---|---|---|
| 3,000 | 800 | 8 | DN32 | 600x700xH700 | 315 | 0.75 | 500 |
| 5,000 | 1,000 | 8 | DN40 | 600x800xH700 | 400 | 1.5 | 500 |
| 8,000 | 1,200 | 8 | DN40 | 600x1000xH700 | 500 | 2.2 | 500 |
| 10,000 | 1,500 | 10 | DN40 | 700x1000xH700 | 550 | 2.2 | 500 |
| 12,000 | 1,600 | 10 | DN50 | 700x1000xH700 | 600 | 3.75 | 500 |
| 15,000 | 1,800 | 10 | DN50 | 700x1200xH700 | 650 | 3.75 | 500 |
| 20,000 | 2,000 | 10 | DN50 | 700x1200xH700 | 750 | 5.5 | 500 |
| 25,000 | 2,200 | 10 | DN50 | 700x1200xH700 | 950 | 5.5 | 600 |
| 30,000 | 2,500 | 12 | DN65 | 700x1200xH700 | 1,000 | 5.5 | 600 |
| 35,000 | 2,700 | 12 | DN65 | 1000x700xH700 | 1,100 | 7.5 | 600 |
| 40,000 | 2,900 | 12 | DN65 | 1000x700xH700 | 1,200 | 7.5 | 600 |
| 45,000 | 3,000 | 12 | DN65 | 1000x700xH700 | 1,250 | 7.5 | 600 |
Custom sizes: Up to 215,000 m3/h air volume. Contact our engineers — xicheng023@outlook.com.
Technical Specifications
| Air volume | 100 – 80,000 m3/h (single tower) |
| Material | Oxidation-stabilized PP (standard); FRP with chemical-resistant veil (high-concentration); 316L SS (combined high-temp + high-Cl2) |
| Wall thickness | 8 – 25 mm (per size); 20% thicker than equivalent acid-only service |
| Structure | Vertical counter-current packed bed: inlet – sump with chemical dosing – packed section – demister – outlet |
| Packing media | Oxidation-stabilized PP Pall rings; PVDF available for extreme service |
| Chemical dosing | Automated pH-controlled NaOH dosing with day tank; 50% excess capacity over stoichiometric |
| Blowdown system | Automatic conductivity-triggered blowdown; prevents NaOCl accumulation beyond material limits |
| Heat management | Recirculation loop cooling when adiabatic temp rise exceeds 8 C |
| Max inlet Cl2 | 500 PPM (stabilized PP); 2000 PPM (FRP); 5000 PPM+ (multi-stage with SS) |
| Purification efficiency | over 95% single-stage; over 99% two-stage |
| Design standard | GB/T 13931-2017; CE certified. See OSHA Cl2 Permissible Exposure Limits for workplace safety requirements. |
Applications
| Industry | Cl2 source | Typical configuration |
|---|---|---|
| Water treatment | Chlorination off-gas, cylinder storage areas | Single-stage stabilized PP with Cl2 sensor |
| Chlor-alkali plants | Cell room ventilation, liquefaction tail gas | Two-stage with emergency backup caustic; CEMS |
| PVC / CPVC production | Reactor vent, monomer recovery exhaust | Combined HCl + Cl2 dual-stage |
| Semiconductor fabs | Etching process exhaust, gas cabinet ventilation | Compact point-of-use abatement |
| Chemical processing | Chlorination reactor vents, storage tank breathing | Sized per peak Cl2 evolution rate |
| Bleach production | Cl2 absorption tower vent, bottling line exhaust | Two-stage with interstage cooling |
How to Order
- You send – Cl2 inlet concentration (PPM or mg/Nm3), air volume (m3/h), exhaust source description, site indoor/outdoor, local emission limit
- We assess material requirements – Based on your Cl2 concentration and temperature, we’ll specify stabilized PP, FRP, or SS — with material test data to back up the selection
- We design – Tower sizing, caustic dosing rate and day tank size, blowdown rate calculation, heat load assessment, P&ID with mass and energy balance
- You approve – Technical proposal with Cl2 removal guarantee, material specification sheets, 3D model, and pricing
- We build – 15-25 days standard + material procurement. Hydrostatic test, spray pattern test, and material certification before shipment
- We ship – All Cl2-contact components documented with material lot numbers. Installation drawings, commissioning procedure, and Cl2 leak test protocol included.
Contact our engineers at xicheng023@outlook.com or WhatsApp +86 18927456906 — proposal within 24 hours.
Complete Your System
- Industrial Spray Scrubber Tower – For mixed acid gases where Cl2 is not the primary concern
- Packed Bed Wet Scrubber – For Cl2 applications requiring maximum mass transfer
- PP Exhaust Duct and Fittings – Stabilized-grade PP ductwork for Cl2 exhaust runs
- PP/FRP Centrifugal Fan – Corrosion-resistant fan with Cl2-compatible materials
- Activated Carbon Adsorption Tower – Polishing stage for trace Cl2
Global Shipping
We ship worldwide with documented export experience across:
- Southeast Asia: Malaysia, Singapore, Indonesia, Philippines, Thailand, Vietnam, Myanmar, Cambodia
- South Asia: India, Pakistan, Bangladesh, Sri Lanka
- Middle East: UAE, Saudi Arabia, Qatar, Oman, Kuwait, Bahrain, Israel
- Africa: Kenya, Nigeria, South Africa, Egypt, Ethiopia, Tanzania, Ghana
- Europe: Germany, UK, France, Italy, Spain, Netherlands, Poland, Turkey, Russia
- Americas: USA, Canada, Mexico, Brazil, Chile, Colombia, Argentina
- Oceania: Australia, New Zealand
Sea freight standard; air freight for small units. Material test reports included with every shipment.
FAQ
How is a chlorine scrubber different from a standard acid gas scrubber?
The material is the key difference. Standard PP degrades under wet Cl2 exposure through oxidative chain scission. We use oxidation-stabilized PP with antioxidant packages that interrupt the degradation mechanism. The chemical dosing system is also different: Cl2 consumes NaOH at twice the molar rate of HCl, so dosing pump and day tank must be sized accordingly, and NaOCl byproduct must be managed through controlled blowdown.
What Cl2 concentration can a single-stage scrubber handle?
Up to 500 PPM inlet with stabilized PP, achieving over 95% removal in a single stage — discharge under 5 PPM. For 500-2000 PPM, we recommend FRP construction and two-stage design. Above 2000 PPM, a multi-stage system with interstage cooling and potentially stainless steel internals is needed.
Do I need continuous Cl2 monitoring?
For chlor-alkali plants, large water treatment facilities (over 500 kg/day Cl2 usage), and any site covered by major hazard regulations: yes, we strongly recommend CEMS at the stack. For smaller installations, a dual-range Cl2 sensor with alarm relay on the discharge line is typically sufficient.
Gas Scrubber Operating Cost Guide
Acid Scrubber Maintenance Guide
Learn More on Our Blog
Design and Selection
- Acid Scrubber System Design Engineering
- Gas Scrubber Selection (Multi-Stage)
- Scrubber Packing Media Selection
- PP vs FRP Wet Scrubber Comparison
Applications and Compliance
- Acid Fume Scrubber Systems (HCl, HF Global Compliance)
- Chemical Fume Scrubber Design
- Scrubber in Air Pollution Control
