What is Wet Scrubbing?
Wet scrubbers are devices which remove particles and gases from exhaust streams. It is called a “wet” scrubber as it captures the unwanted particles (gas) through a liquid.
Wet Scrubber Solutions
As each situation contains many variables, which affect the size and type of scrubber necessary, Parsons offer multiple wet scrubber solutions depending on what work is needed to be done.
Our engineers investigate the site and, after analysis, suggest and implement a solution. Wet scrubbers can be installed individually, or can come as a part of an odour abatement package. How fast the air goes and how wet the packings are, are all critical variables to be determined by the judicious scrubber designer. However, we offer express solutions, known as rapid response rental, if you are looking for a quick resolution.
Molecules of fume or odour are exceedingly dispersed in a gas stream making their treatment nearly impossible. The simple answer is to concentrate. This is a bit tricky with gasses so the answer comes with capturing them in a liquid solution. Once in solution, there is time for neutralisation to occur, but the capturing is the difficult bit.
Wet scrubbing is one of the most effective methods of getting rid of bad odours and pollution in factories and manufacturing environments. Other companies offer temporary services which simply “mask” the smell, similar to using an aerosol. Parsons, however, eliminates the odour by removing the problematic particles themselves.
Types of Wet Scrubbers:
- Chemical Scrubbers
- Gas Scrubbers
- Chlorine Scrubbers
- Particulate Scrubbers
- Dust Scrubbers
- Sulfuric Acid Scrubbers
How Does Wet Scrubbing Work?
The gases then pass up through a bed of random packings, braced on a packing support grid, where they come into contact with the liquid stream flowing in the opposite direction down through the bed.
As the gas and liquid flow past each other, the soluble gases absorb into the non-volatile liquid stream. The cleaned gas then passes out through the top of the column via a demister pad to remove any loose droplets.
The liquid is recirculated from the sump at the base of the column to the top of the packed bed, where specially designed liquid distributors ensure the bed is thoroughly and evenly wetted to provide efficient mixing of the gas and liquid streams.
The equilibrium between the gas and liquid phase for any wet scrubbing process is vital to ensure the maximum removal of the contaminants or odours. When a recirculating solution is used to effect removal, it is essential to ensure that the liquid composition enters the scrubber column at the lowest possible level.
This is even more important in odour scrubbing applications where the emission levels are measured on the ‘Parts per Billion’ scale, rather than the ‘Parts per Million’ scale more normally associated with gas scrubbing such as acid fume removal.
Odour Abatement and Chemical Scrubbing Solutions
If you’d like to know more about our wet scrubber services, read the odour control solution we provided for a wastewater sludge treatment facility here.
Additionally, we have a case study that highlights the wet scrubber solutions we found for a poultry processing plant, here.
More information on Wet Scrubbers
Unfortunately, due to the multitude of factors to be considered in designing an odour control plant, we are unable to offer a ‘Click Here, pay online, deliver tomorrow’ service.
Our plants designed and built to order allowing maximum compatibility with the customers needs, this obviously incurs a not insignificant lead time. If time is critical we may well have a suitable option for near immediate installation available through our Plant Rental department.
Please give our sales department a call, who should be able to help with your queries from “Is it possible…..?” through rough ballpark figures to complete system quotes.