Scrubber for methanol removal
Counter Current Spray System and Random Packings
The vertical scrubber is a column in which the air is humidified directly by means of a counter current spray system using random packings. The vapor enters at the bottom through half a pipe to obtain a laminar airflow. The random packings (Pall rings) above it serve to increase the contact area, with the aim of creating a better and longer exchange between the gas and the washing medium. The spray nozzle that ensures the flushing of the packings is a full cone type.
Wire Mesh Demister for Droplet Capture
The resulting droplets in the housing cannot be discharged to the environment and must therefore be captured. The removal of the droplets is extracted with a wire mesh demister. The spray water including the droplets collect in the wire mesh demister and by gravity end up at the bottom of the column. From here it is pumped back to the spray nozzle (closed loop system).
| Gas flow rate minimum | : | 400 Nm3/h |
| Gas flow rate nominal | : | 700 Nm3/h |
| Gas flow maximum | : | 1,000 Nm3/h |
| Gas composition | : | gas with methanol |
| Design temperature installation | : | 85 °C |
| Current pressure | : | 0 – 100 mbarg |
System Components and Process Water Usage
Process water is used for washing. The washing water is drained after each batch. The installation is equipped with a:
- Stainless steel 316 column
- Siemens S7-1500 PLC in EX-P cabinet
- Integrated buffer
- Agglomerator / droplet separator
- Wire mesh demister
- Centrifugal pump suitable for ATEX zone
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