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A System to Create Stable Nanoparticle Aerosols from Nanopowders
Published on: July 26, 2016
Spray scrubbing of particulate-laden SO(2) using a critical flow atomizer
Amitava Bandyopadhyay1, Manindra Nath Biswas
1West Bengal Pollution Control Board, Alipore Regional Office, Kolkata, India. amitava.bandy@gmail.com
Summary
This study shows that spray towers effectively remove sulfur dioxide (SO2) using water or NaOH, with fly-ash particles significantly boosting SO2 scrubbing efficiency. Optimized atomization enhances performance in industrial applications.
Area of Science:
- Environmental Engineering
- Chemical Engineering
- Air Pollution Control
Background:
- Sulfur dioxide (SO2) is a major air pollutant contributing to acid rain.
- Effective scrubbing technologies are crucial for industrial SO2 emission control.
- Particulate matter can influence the efficiency of gas-liquid scrubbing processes.
Purpose of the Study:
- To evaluate the performance of a spray tower for SO2 scrubbing.
- To investigate the impact of fly-ash particles on SO2 removal efficiency.
- To develop predictive correlations for SO2 scrubbing in water and NaOH solutions.
Main Methods:
- Utilized an energy-efficient two-phase critical flow atomizer in a spray tower.
- Conducted experiments using water and dilute sodium hydroxide (NaOH) as scrubbing liquids.
- Varied parameters such as atomizing air pressure, droplet diameter, and droplet velocity.
- Developed empirical and semi-empirical correlations for removal efficiency.
Main Results:
- Achieved nearly 100% SO2 removal efficiency in water scrubbing.
- Observed a significant enhancement in SO2 removal (up to 20%) due to the presence of fly-ash particles.
- Developed correlations that accurately predicted experimental SO2 removal efficiencies.
- Spray tower performance compared favorably to existing SO2 scrubbing systems.
Conclusions:
- Spray towers with critical flow atomizers are highly effective for SO2 removal.
- Fly-ash particles demonstrably enhance SO2 scrubbing efficiency in spray towers.
- Developed correlations provide reliable tools for predicting spray tower performance in SO2 abatement.
- The studied spray tower system offers a promising and efficient solution for industrial SO2 emission control.
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