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Systèmes utilitaires Cleanroom
Acide et alcalin gaz scrubber
Vertical corrosion-resistant FRP packed tower with recirculation sump, spray distribution, mist eliminator and selected chemical dosing for soluble acid or alkaline exhaust gases.
- Counter-current packed tower for soluble chemical fumes
- Corrosion-resistant FRP shell and polypropylene internals
- Integrated recirculation, dosing and mist separation
Introduction de produit
The Acid and Alkali Gas Scrubber is a vertical packed absorption tower for centralized chemical exhaust. Contaminated air enters below the packing and rises against a downward flow of recirculated scrubbing liquid. Polypropylene packing increases gas-liquid contact, a spray header distributes the selected absorbent and a top mist eliminator retains entrained droplets before the cleaned stream reaches the outlet. The FRP shell, sump and external piping provide a practical corrosion-resistant construction basis. Despite the product name, one circulation loop is charged for either compatible acid-gas neutralization or alkaline-gas absorption; the actual contaminant mixture determines the liquid chemistry, materials, packing depth, blowdown and monitoring package.
Key Features
FRP tower construction resists many corrosive exhaust and wash-liquid environments when the resin is correctly selected
Polypropylene random or structured packing offers high surface area with moderate pressure drop
A full-width spray header distributes recirculated liquid across the packing bed
The integral sump gives the pump a stable suction source and accommodates controlled make-up and blowdown
A top mist eliminator reduces droplet carryover into the outlet stack or downstream fan
External pump and union connections remain accessible without opening the packed tower body
Chemical dosing and pH or conductivity monitoring can maintain the selected absorption condition
Inspection covers provide access to the demister, spray header and packing support zones
Tower diameter, packing height and circulation rate can be scaled to the verified exhaust duty
Préoccupations du client produit
A packed tower works only when the gas chemistry, absorbent, contact time and materials are compatible. Gas loading, salts, solids, pressure drop, liquid carryover and wastewater handling determine the reliable operating window.
Using an alkaline wash for an alkaline gas or an acidic wash for an acid gas provides little neutralization capacityIdentify every significant contaminant and select the recirculating absorbent from the reaction chemistry rather than the tower label.
Insufficient packing depth or excessive gas velocity shortens contact and increases breakthroughSize tower diameter and packed height from the actual airflow, inlet loading, reaction rate and allowable pressure drop.
Precipitated salts or captured solids can channel the liquid and plug packingEvaluate reaction products, maintain blowdown, inspect pressure drop and add solids separation or cleanable pre-treatment where needed.
A resin or gasket that tolerates the inlet gas may fail in the concentrated recirculating liquidCheck shell resin, liner, packing, seal, pump and piping compatibility against both the exhaust and the full wash-liquid composition.
An exhausted or over-diluted wash solution can look normal while absorption capacity fallsUse suitable pH, conductivity, oxidation-reduction or concentration control with defined make-up and blowdown logic.
High outlet velocity or a fouled demister can carry corrosive droplets into the stack and fanKeep separator face velocity within its selected range and provide wash access, drainage and differential-pressure inspection.
Les applications typiques
Acid-pickling, plating and surface-treatment exhaust containing soluble acid fumesChemical and pharmaceutical rooms exhausting compatible hydrochloric, sulfuric or nitric acid vaporAmmonia and alkaline-process ventilation treated with a separately selected acidic wash solutionBattery, electronics and materials production with characterized corrosive fume loadsCentral laboratory and clean-manufacturing exhaust systems requiring corrosion-resistant wet absorption
Paramètres techniques
The displayed basis is a vertical FRP packed tower approximately 1800 mm in diameter and 6000 mm overall height, with a 2000 mm nominal packing zone, integral recirculation sump, one external pump, top demister and small dosing package. The site's fixed ten-row schema uses panel-oriented labels; Panel Thickness therefore records the representative structural shell wall rather than cabinet depth, while Steel Facing Thickness is zero because the corrosion barrier is nonmetallic. Exhaust volume, packing, liquid chemistry, circulation rate, resin system, fan and instrumentation are selected for the actual duty.
| Matériaux de base | Vinyl-ester FRP tower and sump with polypropylene packing, spray internals and compatible thermoplastic recirculation piping |
|---|---|
| Panneau épaisseur | 8-12 mm representative FRP shell wall for the displayed 1800 mm tower basis, subject to structural design |
| Largeur effective | 1800 mm representative tower inside-diameter basis before external piping, ladder and pump envelope |
| Longueur maximale | 6000 mm representative overall tower height including sump and top outlet section |
| Acier face épaisseur | 0 mm; the process shell is corrosion-resistant FRP rather than steel-faced construction |
| Densité Core | Approximately 1700 kg/m³ representative density for the selected FRP laminate basis |
| Conductivité thermique | Approximately 0.30 W/(m·K) for a representative glass-reinforced polymer laminate |
| surface finie | Smooth pale sea-green corrosion-resistant FRP exterior with resin-rich internal barrier and natural-color polypropylene packing |
| Type joint | Flanged gas inlet and outlet with laminated FRP vessel joints, gasketed access covers and unioned pump and spray-loop piping |
| Customisation | Disponible en fonction de l'application prévue et de l'environnement d'exploitation. |
Options disponibles
Acid-gas or alkaline-gas wash chemistry selected as separate dutiesAlternative FRP resin, PP, PVC, CPVC, PVDF or dual-laminate wetted constructionRandom or structured polypropylene packing in application-specific depthSingle or multiple packed stages with independent circulation loopsRedundant corrosion-resistant circulation pumpsAutomatic reagent dosing, make-up, blowdown and liquid-level controlpH, conductivity, oxidation-reduction potential and differential-pressure monitoringMist eliminator wash system and accessible packing-cleaning provisionsIntegral or remote corrosion-resistant exhaust fan and stack transition
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