Stainless Steel Acid Fume Control Scrubbing Systems, Automation Grade: Fully Automatic

Wet Scrubbers washes gasses with pH balancing chemicals and water. This technic globally approved with all chemical pocesses and most efficiency (Average: ˜-99) technic.Wet scrubbers mostly uses in jewellery, chemical recycling, mining and any acid and bases uses in sectors.SO2, HCl, H2SO4, HNO3,NH3, Amines, Monomers, Acetic Acid, Formaldehyde, Methanol, Ethanol, Propanol, Methyl mercaptan, Ethyl mercaptan, Dimethyl sulphide, Dimethyl disulfideAdvanced Air Technologies, (AAT) were able to determine the peak air flow rate of 500 scfm, given a tanker truck pressure of an equivalent length of 2 in. hose of 100 ft. Design removal efficiency was determined based on achieving an HCl exhaust concentration of 50% of its . Required scrubbing efficiency would thus be 99.99%. Whereas water recirculation containing up to 20% by weight HCl can be used in 99% efficient HCl air scrubbers, the 99.99% efficiency would require the use of recirculating Sodium Hydroxide (NaOH) solution. At such a high concentration of HCl, special mist elimination techniques had to be employed to prevent HCl "fog" from exiting the air scrubber. This "fog" or aerosol forms spontaneously when high concentrations of HCl are introduced into a humid environment (such as an air scrubber). The NaOH solution would have to be charged into the air scrubber and batched due to the impossibility of keeping up with the end-of-fill burst of HCl using any kind of chemical feed system. The starting strength of NaOH was determined to be 20% by weight, since this is both commercially available and gives the highest utilization without crystallizing Sodium Chloride (NaCl) by-product. 20% NaOH also has the advantage of having a highly depressed freezing point of -20 oF.An Apollo 500 air scrubber was chosen for this application due to it having a large recirculation tank (180 gallons) and two scrubbing stages – an ejector-venturi and packed tower. The ejector venturi part of the air scrubber removes 90% of the HCl and dissipates most of the Heat of Reaction generated when the HCl is neutralized by the NaOH, while also inducing air flow by creating a suction draft. The packed tower portion of the air scrubber, containing an extended 8 ft. tall packing bed and 2-stage high efficiency mist eliminator, achieves the remaining 99.9% removal of HCl.