Product Introduction

Scrubbers absorb and dissolve soluble components in absorption liquid to remove gaseous pollutants such as Volatile Organic Compounds (VOCs), fumes, and mist. However, the gas to be treated must be physically or chemically reactive with the absorption liquid for removal. This device installs a liquid dispersion device that sprays the absorption liquid onto a packed bed filled with packing material, and passes the gas through below the packed bed. The sprayed absorption liquid is circulated by a circulation pump, and the gas passing through the packing layer and the liquid dispersion device is finally purified by an eliminator and discharged.

Key Features

• Scrubber using packing tower

  • Depending on the characteristics of the pollutants, substances such as acids/bases or oxidizers/reducers are used as the absorption liquid.
  • Packing materials are used to increase the contact area between the gas and the absorption liquid.
  • Highly efficient at removing high concentrations of gaseous pollutants.
  • Maintains a consistent removal efficiency even with fluctuations in gas flow rate.
  • The pressure loss is low, between 10~50mmAq, resulting in relatively low power costs.

Key Design Factors

• Scrubber material

  • The material of the scrubber is selected considering the characteristics of the pollutants and the chemical reactions involved.
  • PVC+FRP: Durable, lightweight, and inexpensive but has lower chemical resistance than FRP.
  • FRP: Good chemical resistance (vulnerable to sulfuric acid), but weak against impacts.
  • STS: Excellent in chemical resistance and durability.

• Packing material

  • The material of the scrubber is selected considering the characteristics of the pollutants and the chemical reactions involved.

• Absorption liquid

  • The suitable absorption liquid is selected considering the characteristics of the pollutants and the chemical reactions involved.

  Pollutant	Absorption liquid	Chemical reaction formula	Representative industries
  Ammonia (NH3)	H2SO4 HCL NaOCl	2NH3＋H2SO4 → (NH4)2SO4 NH3＋HCl → NH4Cl2NH3＋ 3NaOCl → N2＋3NaCl＋3HO	Livestock agriculture, poultry farms, complex fertilizer manufacturing, starch manufacturing, fishmeal processing plants, waste treatment plants, manure processing plants, sewage treatment plants, etc.
  Trimethylamine[(CH3)3N]	H2SO4 HCL NaOCl	(CH3)3N＋H2SO4＋(CH3)3N · H2SO4(CH3)3N＋HCl → (CH3)3N · HCl(CH3)3N＋NaOCl → (CH3)3NO · NaCl	Livestock agriculture, complex fertilizer manufacturing, starch manufacturing, fishmeal processing plants, waste treatment plants, manure processing plants, sewage treatment plants, etc.
  Hydrogen sulfide (H2S)	NaOH NaOCl	H2S＋NaOH → Na2S＋H2O Na2S＋H2S → 2NaSH H2S＋2NaOH → Na2S＋2H2O Na2S＋4NaOCl → Na2SO4＋ 4NaCl Na2S＋NaOCl＋H2O → S＋NaCl＋2NaOH	Kraft pulp factories, fishmeal processing plants, waste treatment plants, cellophane manufacturing, viscose rayon factories, chemical plants, fishmeal processing plants, leather processing plants, waste treatment plants, manure processing plants, sewage treatment plants, etc.
  Methyl mercaptan (CH3SH)	NaOH NaOCl	CH3SH＋NaOH → CH3SNa＋ H2O2CH3SH＋6NaOCl → 2CH3SO3＋6NaCl＋H2 ↑	Kraft pulp factories, fishmeal processing plants, waste treatment plants, manure processing plants, sewage treatment plants, etc.
  Dimethyl sulfide [(CH3)2S]	NaOCl	(CH3)2S＋3NaOCl → (CH3)2SO3＋3NaCl	Kraft pulp factories, fishmeal processing plants, waste treatment plants, manure processing plants, sewage treatment plants, etc.
  Acetaldehyde (CH3CHO)	NaOCl	CH3CHO＋NaOCl＋NaOH → CH3COONa＋NaCl＋H2O	Acetaldehyde manufacturing plants, acetic acid manufacturing plants, acetic acid vinyl manufacturing plants, chloroprene manufacturing plants, tobacco manufacturing plants, complex fertilizer manufacturing, fishmeal processing plants
  Styrene (C6H5)	HClO	C6H5CHCH2＋HClO → C6H5CHOHCH2Cl	Styrene manufacturing plants, polystyrene manufacturing plants, polystyrene processing plants, SBR manufacturing plants, FRP product manufacturing plants, etc.

Applications

• • Facilities using organic solvents, painting facilities, semiconductor factories, PCB factories, electroplating factories, food factories, paint manufacturing, printing shops, petrochemical plants, wastewater treatment plants, and other facilities emitting gaseous pollutants.
  • Business establishments subject to air pollutant discharge facility registration and licensing.
  • Business establishments required to submit a hazardous risk prevention plan.