The type of Odor Control wet scrubber selected for the treatment and neutralization of Ammonia (NH3) gases depends on several variables including the type and source of the ammonia gas and whether or not it is “Free” ammonia and or unionized. Ammonia is a very miscible and stable molecule with strong hydrogen bonds which makes it very soluble in water and can be very difficult to treat without the use of a properly designed and sized ammonia scrubber. The concentrations, air flow rates, temperature of the gas stream, and chemical reagent being utilized such as caustic to first remove and then treat the ammonia all plays a significant role on the efficiency of the ammonia scrubber. Unlike other types of “odor control scrubbers” an ammonia scrubber is much more sensitive to variables such as the gas stream temperature because of the solubility of ammonia.
the process is called the Haber Process by combining nitrogen with air and adding pressure you can make ammonia. It takes about 200 atmospheres of pressure and the process varies from refinery to refinery but on average you can only make approximately 15% of ammonia during each pass which takes multiple passes to achieve the 15%. The reaction to make ammonia is exothermic when being produced in a refining process.
However, ammonia is also formed in nature in smaller quantities. Most of the ammonia (90%) is utilized for fertilizer production but ammonia can be found in food, pharmaceutical products, and cleaning supplies. When ammonia gas is released to the air it has a very noxious and pungent odor that can be dangerous to inhale so often times odor control scrubbers are required to capture and treat the ammonia gas.
When treating Ammonia
sulfuric acid solution is utilized to neutralize the ammonia in the gas stream and caustic can be used to adjust the pH of the waste stream prior to disposal. The ammonia contaminated gas enters at the bottom of the vertical packed tower and the air travels upward. A solution containing sulfuric acid (H2SO4) in water is recirculated in a loop process. The chemical reagent is introduced at the top of the vertical tower through a distribution system designed by DeLoach Industries and travels down through and across the media bed. The random packed media is typically made from polypropylene material and is resistant to the low pH of the solution. The media bed is supported by a false bottom that separates the media bed from the solution tank below. Then the air travels upward it meets the acidic solution and a reaction occurs to neutralize the ammonia gas.
It is critical to achieving high removal efficiency and with a DeLoach Industries ammonia scrubber the removal of 99% and above is achieved with full controls and automation. DeLoach Industries biological odor control scrubbers and chemical scrubbers utilizing acids, caustic, and other reagents are designed for harsh environments to treat noxious gases and they incorporate additional controls to assist operators in their maintenance such as air scoring systems, or the new patent pending technology for “Artificial Intelligence” (AI) built into the scrubber that monitors and adjusts key critical functions and notifies service staff when a change in condition has occurred. With new technology operators are provided with more support from their scrubbers now than ever before. This technology being introduced and pioneered by DeLoach Industries will save thousands of dollars and countless hours from operators by informing them in advance of change of conditions of the ammonia or other types of “odor control scrubbers” including “biological scrubbers” used for “hydrogen sulfide scrubbing” and “acid scrubbers”. Just imagine a Scrubber that will think for itself and inform the operator of its performance status and take the necessary steps to correct any change in performance. AI is also being incorporated into DeLoach Industries full line of air stripping, degasification, and decarbonation towers and systems. The professionals at DeLoach Industries are available to answer any further questions you may have. Feel free to give us a call us at (941) 371-4995.