Single-Stage Vertical Tower
The workhorse for one dominant pollutant — pickling, plating and lab exhaust. Smallest footprint per m³/h.
PP Wet Scrubbers & Acid Mist Purification Towers
JHF wet scrubbers strip acid and alkali fumes — HCl, H₂SO₄, HNO₃, HF, NaOH, chrome mist — out of process exhaust using packed-bed absorption in a corrosion-proof polypropylene body. We are the factory: we extrude the PP sheet, weld the tower, build the recirculation skid and spray-test the finished unit before it ships.
Every scrubber is sized from your actual airflow and pollutant load, not picked from a brochure. You receive the sizing basis, GA drawing and test video as part of the order.
- 1,000 – 120,000 m³/h per unit; larger duties split across parallel towers
- Vertical counter-flow, horizontal cross-flow, and 1–3 stage configurations
- Designed for ≥95–99% removal on soluble acid/alkali fumes and mists
- PP-H body 8–15 mm; PPH or PVDF wetted parts for HF and hot service
- Complete with recirculation tank, pump, nozzles, demister and pH dosing option
Technical data
Typical Design Parameters
| Airflow range | 1,000 – 120,000 m³/h per tower (custom-sized to your duty) |
| Removal efficiency | ≥ 95–99% for HCl, H₂SO₄, HNO₃, NaOH, chromic acid mist — depending on inlet load, stages and packing depth; sizing basis provided with each proposal |
| Configurations | Vertical counter-flow tower · horizontal cross-flow scrubber · single / two / three-stage · acid-alkali neutralizing (dual-liquor) design |
| Body material | PP-H sheet 8–15 mm (extruded in-house); PPH high-purity or PVDF lining for HF and elevated temperature; external FRP reinforcement for large diameters |
| Packing | PP Pall rings, multi-face hollow balls or Intalox saddles; 1–3 beds, 800–1,500 mm per bed, with liquid redistributors |
| Spray system | PP spiral or full-cone nozzles, 2–4 headers, non-clog design; PP/CPVC piping |
| Demister | Baffle-plate or mesh-pad mist eliminator, washable, droplet carry-over < 75 mg/m³ |
| Recirculation system | Integrated or separate PP tank, vertical/magnetic corrosion-proof pump, level and pH instrumentation, dosing port for NaOH / acid make-up |
| Pressure drop | 300 – 800 Pa typical across packed sections |
| Gas temperature | ≤ 60 °C continuous for PP (80 °C peak); pre-quench section or PVDF construction for hotter streams |
| Options | Fan + stack package, access platform & ladder, activated-carbon polishing stage, PLC control panel, differential pressure gauges, sectional shipping design |
Values above are typical envelopes, confirmed per project in the sizing sheet you receive with the quotation.
Configurations
Pick the Geometry That Fits Your Plant
Two-Stage Tower
Two independent liquor loops in one shell — e.g. water quench + caustic stage, or acid stage + polishing.
Three-Stage Tower
For high inlet loads or strict stack limits; staged absorption reaches the ≥99% end of the curve.
Horizontal Cross-Flow
For rooftops and low headroom — same packing duty laid flat, easy inline connection to duct runs.
Acid–Alkali Neutralizing
Dual-liquor design that handles mixed acid + alkali exhaust from multi-process workshops.
Venturi & Special Designs
Venturi pre-scrubbers for sticky/particulate-laden gas, desulfurization towers, and bio-trickling odor units.
Engineering notes
How a JHF Packed-Bed Scrubber Is Built
Corrosive exhaust enters tangentially or through a distribution section, rises through one or more packed beds, and meets recirculating scrubbing liquor sprayed from non-clog nozzles above each bed. Soluble gases transfer into the liquid film on the packing surface; a final demister strips entrained droplets before the cleaned air leaves to the fan and stack. pH-controlled dosing keeps the liquor reactive, and a small bleed stream goes to your effluent plant.
Details that decide whether a scrubber actually performs
- Honest gas velocity. We size tower diameter for 1.8–2.5 m/s through the packing — pushing a small tower hard is the most common reason competitor units miss their numbers.
- Packing depth matched to solubility. HCl strips easily; HF, NOx and chromic mist need deeper beds, more stages or special liquor. Our proposal states bed depth and expected outlet, per pollutant.
- Liquid distribution. Full-coverage nozzle layout with redistributors between beds — no dry channels, no bypassing.
- Serviceability. Flanged packing access ports, clear sight glasses, washable demister, and pumps mounted at floor level for maintenance without confined-space entry.
- Structure. CNC-cut PP-H sheet, extrusion-welded by certified welders, ribbed and FRP-wrapped where diameter demands; every vessel is water-fill tested and every spray system run-tested before packing.
Where they run
Electroplating and anodizing lines, PCB etching and regeneration, steel pickling, battery and PV wet processes, laboratory fume systems, fertilizer and chemical dosing plants, and wastewater odor control. See industries we serve for typical flow schemes, or the matching corrosion-resistant fans and PP ducting that complete the system.
FAQ
PP Scrubber Questions, Answered
Can you guarantee outlet emission values?
We guarantee the design removal efficiency for the pollutant loads you declare, and we put it in the contract together with the sizing basis. If you can send a recent stack test or process data, the guarantee gets tighter.
Is PP the right material for my chemicals?
PP handles most acids, alkalis and salt solutions up to 60 °C — it is the standard for HCl, H₂SO₄ and NaOH service. For HF we use PPH or PVDF wetted parts; for solvents and oxidizers we check compatibility case by case and will tell you honestly if FRP or stainless suits better.
How do you ship a 6-meter tower overseas?
Towers up to container height ship in one piece; taller units are fabricated in flanged sections with numbered, gasketed joints and reassembled on site in hours. Packing media ships bagged inside the tower to save freight.
What do you need from me for an accurate quote?
Three things: airflow (or duct size and fan data), the chemicals involved, and where the unit will stand (indoor/outdoor, headroom). Photos of the line help. With that we return sizing, a GA drawing and price within 12 working hours.
Do you supply just the tower, or the whole system?
Either. Many customers buy the scrubber alone to replace a failed unit; many order the package — hoods, duct, scrubber, fan, stack and controls — as a turnkey fume extraction system.
Get it priced
Send Your Fume Data — Get Sizing and a Factory Price
Tell us airflow, chemicals and where the scrubber will stand. Within 12 working hours an engineer replies with tower sizing, packing selection, a general-arrangement drawing and the factory-direct price — FOB or CIF your port.
Prefer chat? Message us on WhatsApp +86 186 1558 6932 or email sales@jhf2017.com.
Sizing sheet with every quoteSpray test video before shipmentExport packing included