Scrubber for removal of HCN

PP Scrubber with Tangential Full Cone Spray Nozzles

The contaminated gas enters the scrubber through a side entry at the bottom via half a pipe to ensure a laminar airflow. It then passes through a packed bed of random packings (pall rings), where washing water containing caustic soda (NaOH) and sodium hypochlorite (NaOCl) is dissolved using tangential full cone spray nozzles. This washing water is used to wash out the HCN and other acidic components.

Polypropylene (PP) Scrubber with Water Buffer

Our scrubber is manufactured from polypropylene (PP) and has its own water buffer from which the washing water must be pumped in a closed loop. Finally, a slat separator in combination with a wire mesh demister separates the resulting droplets.

Quench and Scrubber Pump for Constant Pressure and Liquid Flow

To ensure proper operation, our scrubber comes equipped with a quench and scrubber pump built directly next to the column. The pumps maintain a constant pressure and liquid flow, with a block option via flanged manually operated ball valves and a pressure transmitter on the press side to assess the status of the nozzles.

Extra Safety Features

For added safety, the scrubber pump also has a flow switch that generates an alarm if the flow over the packed bed becomes too low. A higher pump pressure compared to the initial pressure may indicate clogged nozzles, while lower pump pressure may indicate worn nozzles or leakage.

Package system

• Polypropylene column
• Siemens S7-1500 PLC in Rittal cabinet
• KSB centrifugal pumps
• Endress + Hauser instrumentation
• ECON valves
• Centrifugal fan
• Iwaki dosing pumps