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hcl scrubber Applications

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    Raw-gas monitoring for scrubber optimizing

    The consumption of scrubbing material in a scrubber is related to the mass flow of acid gases. Hydrogen chloride (HCl) and sulphur dioxide (SO2) are the major acid gases in an incinerator. By measuring the mass flow of SO2 and HCl in the raw gas going into the scrubber, it is possible to calculate the required quantity of scrubbing material.

    By Opsis AB based in Furulund, SWEDEN.

  • Odor Scrubbers Applications with Hydrogen Peroxide

    Hydrogen Peroxide as a Replacement for Sodium Hypochlorite Hydrogen peroxide may be used in both mist scrubbers and packed tower scrubbers as a replacement for sodium hypochlorite (bleach). Like bleach, the process involves two concurrent mechanisms: 1) absorption of the odors (H2S) into the alkaline scrubbing solution; and 2) oxidation of the absorbed sulfide in solution. Step 1: H2S + NaOH → NaSH + H2O Step 2: 4H2O2 + H2S → H2SO4 + 4H2O Typical dose ratios are 5 parts H2O2 per part H2S or, when used in place of bleach, one gallon 50% H2O2 for every 10 gallons of 15% sodium hypochlorite (NaOCl). This generally translates into a break-even cost scenario. Sufficient caustic soda (NaOH) is added to maintain a pH of 10.0 - 10.5 in the scrubbing solution. There is also in practice a process which uses H2O2 in series with bleach to scrub composting odors. This process relies on a series of three packed tower scrubbers: the first is a pH neutral water wash (to remove ammonia and amine odors); the second uses a conventional caustic/bleach solution in which the bleach is purposely overdosed (to oxidize the complex organic sulfur odors); and the third uses a caustic/H2O2 solution (to remove the unreacted chlorine vapors carried over from the second stage). H2O2 + HOCl → HCl + H2O + O2 Typical dose ratios are 0.5 parts H2O2 per part hypochlorite (OCl-), with sufficient caustic soda (NaOH) added to maintain a pH of 8.5 in the scrubbing solution.

    By USP Technologies based in Atlanta, GEORGIA (US) (USA).

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    MEGTEC's extensive scrubber experience applies to the cement manufacturing process for the effective control of SO2 and HCl by the injection of lime slurry. Our customers can achieve up to 90% reduction of SO2 and 98% reduction of HCl using microfine or standard lime. The TurboSorb Spray Dryer Absorber (SDA) can often retrofit into an existing gas conditioning tower, or downcomer duct, to avoid the high cost of new capital equipment.

    By Babcock & Wilcox MEGTEC based in De Pere, WISCONSIN (USA).

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    Applications and Air Pollutants Removed in Hazardous, Solid and Liquid Waste Treatment Operations

    Venturi scrubbers with FORCE FLUX Condensation technology and Wet Electrostatic Precipitators for industrial, municipal, sewage sludge and pathological waste incinerators to remove micron, submicron particulate, heavy metals and acid gases. Special quencher/scrubber systems for dioxin removal. HCL scrubbing from PVC plastic waste burning. Fine particulate, acid gases and NOx removal on munitions destruction. Cleanup of all pollutants from liquid waste incinerators and other high temperature destruction processes. Acid and particulate emissions from electronic board and metals recovery operations.

    By Bionomic Industries Inc. based in Mahwah, NEW JERSEY (USA).

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    Applications and Air Pollutants Removed in the Petroleum/Petrochemical Industry

    Scrubbing of Hydrogen sulfide, mercaptans and other organosulfur compounds from sour gas and other sources. Proprietary regenerative scrubbing chemistries for hydrogen sulfide removal with sulfur production. By-product production systems for producing sodium hydrosulfide (Nash) from hydrogen sulfide. Sulfur dioxide scrubbing. Recover catalyst dust from FCC units. HCL storage tank vent scrubbing. Removal of HCL and particulate from thermal oxidizers burning chlorinated plastics. Marine drilling platforms sulfur dioxide thermal oxidizer emissions.  Asphalt plant scrubbers and hydrogen sulfide emissions from holding tanks. Pilot plant scrubber systems for hydrogen sulfide. Removal of halogenated and sulfur bearing gaseous compounds from high temperature thermal oxidizers and drilling platforms waste. Well drilling hydrochloric acid storage tanks.

    By Bionomic Industries Inc. based in Mahwah, NEW JERSEY (USA).

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