NH3 Scrubber for Ammonia and VOC removal

A complete horizontal counter current scrubber installation, which will reduce emissions and odor load below legal limits as according to governmental laws. The counter current scrubber consists of a horizontal, rectangular housing made of AISI 316L which, seen in flow direction, is made up of three series-mounted washing sections in which spraying is done with a solution of sulfuric acid and sodium hypochlorite, then caustic soda and finally neutral washing water. All three sections are structurally identical. Each section is equipped with several spray arms in succession on which clogging-free nozzles are mounted to obtain a long spraying pattern.

Section 1: Oxidative washing section (acid corrected)

Acid corrected (sulfuric acid solution) wash section to neutralize ammonia and amines supplemented with a sodium hypochlorite solution to oxidize the (odor-forming) elements. The chemicals are dosed in the integrated buffer tank, the pH value, free chlorine value and conductivity of the washing water are measured in the press of the pump so that the required amount of sodium hypochlorite is automatically dosed. If necessary, sulfuric acid is dosed to regulate the pH value.

Section 2: Alkaline wash section

Basic washing section, which is structurally identical to the first wax section, with caustic soda solution, for neutralizing the acid-forming components and removing any free chlorine that may have been carried away from the previous section. The chemicals are dosed in the integrated buffer tank, the pH value and the conductivity of the washing water are measured in the press of the pump. Based on these measured values, the required amount of caustic soda is automatically dosed in the integrated buffer of the washing section.

Section 3: Neutral section

Washing section, which is structurally identical to the first and second washing sections, with clean washing water for a final capture / absorption of water-soluble gas particles and any fumes from the previous washing sections.

Package system

• Stainless steel 316 housing
• Siemens S7-1500 PLC in container
• BRL accredated dosing system
• Centrifugal pumps
• KSB centrifugal pumps
• Endress + Hauser instrumentation
• ECON valves