What type of mist eliminator is best for chlorine gas drying towers?

For chlorine gas drying towers, candle mist eliminators (fiber bed type) are the most effective choice. They capture sub-micron sulfuric acid mist aerosols down to 0.1 μm, maintaining outlet emissions below 1 ppm. Materials must withstand wet chlorine environments — recommended construction includes Titanium Gr.2 or Hastelloy C-276 housings with PTFE fiber media.

Which materials are suitable for mist eliminators in chlor-alkali plants?

Material selection depends on the specific process: Wet chlorine service requires Titanium Gr.2 or Hastelloy C-276. HCl acid service requires PVDF or Tantalum. Caustic soda (NaOH) service uses Nickel 200 or SS 316L. Fiber media options include PTFE (universal chemical resistance), borosilicate glass fiber, or polypropylene. Structural vane components use PTFE-lined steel, FRP, PVC, or PP construction.

Can wire mesh demisters be used in HCl absorption systems?

Wire mesh demisters can remove bulk liquid droplets larger than 10 μm in HCl absorption columns. However, for fine HCl acid mist and aerosols below 3 μm, a candle mist eliminator (fiber bed) is required as a secondary polishing stage. Many chlor-alkali plants use a combination approach — wire mesh or vane type for primary knockout followed by fiber bed candles for sub-micron emission control.

What emission levels can ECOGRACE mist eliminators achieve in chlor-alkali applications?

ECOGRACE fiber bed mist eliminators consistently achieve outlet emissions below 1 ppm for chlorine and below 5 mg/Nm³ for acid mist in chlor-alkali service. This meets or exceeds EPA, EU BAT, and local environmental compliance requirements. Performance is maintained across chlorine drying, HCl synthesis, caustic evaporation, brine electrolysis, and sodium hypochlorite production applications.

Does ECOGRACE supply retrofit mist eliminators for existing chlor-alkali plants?

Yes. ECOGRACE supplies retrofit mist eliminators and drop-in replacement elements for existing chlor-alkali plant vessels. We manufacture compatible candle elements, wire mesh pads, and vane packs to fit all major OEM systems. Our engineers perform site assessment and design exact-fit replacements matching existing vessel connections and tubesheet layouts.

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Chlor-Alkali and Chemical Manufacturing Plant

Mist Eliminators › Industries › Chlor-Alkali & Chemical

Mist Eliminators for Chlor-Alkali & Chemical Industry

Name: Chlor-Alkali Mist Eliminator | & Chemical Chlorine Gas & Caustic Aerosol Control
Brand: ECOGRACE
Price: 298 USD
Availability: InStock

Chlorine gas drying, HCl absorption, caustic soda evaporation, brine processing, and specialty chemical mist elimination solutions.

Chlor-Alkali & Chemical Industry Mist Challenges

The chlor-alkali industry produces chlorine (Cl&sub2;), caustic soda (NaOH), and hydrogen (H&sub2;) through electrolysis of brine (NaCl solution). These processes generate highly corrosive mists containing hydrochloric acid (HCl), chlorine, sodium hydroxide, and sulfuric acid aerosols that demand specialized mist elimination technology. Downstream chemical manufacturing — including PVC, chlorinated solvents, hydrochloric acid, sodium hypochlorite, and specialty chemicals — creates additional mist elimination challenges across hundreds of process units.

ECOGRACE provides corrosion-resistant mist eliminators for the full chlor-alkali value chain: candle mist eliminators with PTFE or polypropylene fibers for sub-micron acid mist, wire mesh demisters in exotic alloys (Hastelloy, titanium, PVDF) for aggressive chemical environments, and vane type mist eliminators in PTFE-lined or FRP construction for high-velocity chlorine and acid gas streams.

Chlor-Alkali & Chemical Applications

Chlorine Gas Drying Towers

Wet chlorine from electrolysis cells is dried using concentrated H&sub2;SO&sub4; in packed tower systems. The overhead gas carries entrained sulfuric acid mist that must be removed before downstream chlorine compression and liquefaction. Sub-micron H&sub2;SO&sub4; aerosol (<1 µm) requires fiber bed filtration to achieve <1 ppm acid carryover.

Recommended: Candle Mist Eliminator (PTFE fiber / glass fiber)

HCl Absorption & Synthesis

HCl gas absorption columns, HCl synthesis units (burner/absorber), and muriatic acid production generate fine hydrochloric acid mist. Demisting the absorber off-gas prevents HCl emission and recovers valuable product. PVDF or PTFE-coated wire mesh and candle filters provide the required corrosion resistance.

Recommended: Wire Mesh Demister (PVDF) + Candle Filter (PTFE)

Caustic Soda Evaporators

Multi-effect evaporator systems concentrate NaOH from 10–12% (cell liquor) to 50% (commercial grade) or 70% (anhydrous). Steam from evaporators carries entrained NaOH droplets that contaminate condensate, causing boiler feed water quality problems and product loss.

Recommended: Wire Mesh Demister (Nickel 200 / SS 316L)

Brine Electrolysis & Cell Room Ventilation

Membrane and diaphragm cell electrolysis of brine produces wet chlorine, hydrogen, and caustic soda. Cell gas streams carry NaCl brine mist and NaOH droplets. Cell room ventilation systems must capture chlorine and caustic aerosols to protect workers and meet occupational exposure limits.

Recommended: Vane Pack (PP/FRP) + Wire Mesh (PP)

Sodium Hypochlorite (Bleach) Production

Chlorine absorption in caustic soda to produce NaOCl generates entrained mist from the absorption tower. Vent gas from bleach production must be demisted to prevent chlorine emission and product loss.

Recommended: Vane Type Eliminator (PVC/PP)

Specialty Chemical & Pharmaceutical

Reactor vents, distillation columns, solvent recovery systems, and scrubber off-gas in chemical and pharmaceutical manufacturing. Applications range from organic acid mist to inorganic chemical aerosol, requiring material selection specific to each process chemistry.

Recommended: Candle Filter or Wire Mesh (material per application)

Material Selection for Chlor-Alkali Environments

Chemical Environment	Wire Mesh Material	Vane Pack Material	Candle Fiber
Wet Chlorine (Cl&sub2;)	Titanium Gr.2 / Hastelloy C-276	PTFE-lined / FRP	PTFE fiber
Hydrochloric Acid (HCl)	PVDF / Tantalum / Hastelloy B-3	PVC / PP / FRP	PTFE / PP fiber
Sulfuric Acid (H&sub2;SO&sub4;)	Alloy 20 / Hastelloy C-276	FRP / PTFE-lined	Glass fiber / PTFE
Caustic Soda (NaOH)	Nickel 200 / SS 316L	SS 316L / Nickel	Glass fiber
NaCl Brine	Titanium Gr.2 / SS 316L	PP / FRP	PP fiber