Flue gas cleaning: An effective solution for the reduction of air pollutants from our waste
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Flue gas cleaning is crucial for industries that use combustion as a production process. Waste incinerators, thermal power plants and organic waste treatment plants produce fumes containing pollutants such as sulfur oxides (SOx), nitrogen oxides (NOx), heavy metals and solid particles. These emissions can cause serious air pollution problems, affecting air quality and public health. Flue gas scrubbing enables these emissions to be treated before they reach the atmosphere, contributing to environmental protection and regulatory compliance.
Tailor-made answers to your industrial challenges
EXPERTISE.
Servithen draws on its 38 years of experience to solve your environmental waste problems with washing neutralization solutions, combining appropriate technical processes with CAPEX and OPEX control.
MULTIDISCIPLINARITY.
Our engineers have a wide range of skills, enabling Servithen to offer complete, customized solutions, while ensuring compliance with current regulations.
ADAPTABILITY.
Servithen takes the time to analyze your situation in detail, to offer you a tailor-made solution that meets your expectations and respects your constraints.
How does flue gas cleaning work?
Stages in the formation of industrial fumes
What are the steps involved in washing the exhaust fumes?
Cooling and saturation: The fumes are cooled by water injection, evaporation to saturation. This cooling is crucial to lower the temperature and prepare the fumes for more efficient treatment.
Wet dust removal: The smoke from combustion passes through a venturi, where it is accelerated and brought into contact with water droplets. This allows the capture of remaining solid particles by transfer of the particles from the gas phase to the liquid phase.
Capture of acid pollutants and heavy metals:
– Acid column: HCl and some heavy metals are captured thanks to their solubility in acidic water. The fumes pass through an acidic solution, allowing the absorption of these pollutants.
– Basic column: The fumes are then passed into a basic solution (often soda) to capture the remaining SO2 and heavy metals. This double step ensures effective neutralization of different types of pollutants.
Final dust removal: If necessary, a wet ESP can be used to remove the ultimate particles. This filter uses an electric field to precipitate the residual solid particles.
What are the characteristics of flue gas cleaning?
Advantages :
– High efficiency in pollutant capture.
– Low reagent consumption, optimizing reagent use.
– Reduced solid residues, facilitating waste management.
Disadvantages :
– Water treatment required to manage liquid effluents.
– Significant water consumption.
– Maintenance costs for management and upkeep of installations.
The washing tower: how it works.
A scrubber tower is a key facility in flue gas scrubbing. It uses acidic and basic scrubbing solutions to neutralize acid gases and capture heavy metals such as mercury and cadmium.
What are the advantages of using it?
– Highly efficient neutralization of acidic pollutants.
– Flexibility to treat different types of pollutants.
But, in return, you need to know that ...
– High construction and maintenance costs.
– Need to treat liquid effluent.
The venturi scrubber: how it works
The venturi is a wet dust collector. It works by accelerating the fumes and bringing them into contact with droplets of saturation water and then dust removal water.
What are the advantages of using it?
– Effective at capturing solid particles.
– Can be used as a saturator before subsequent washing steps.
But, in return, you need to know that ...
– High water and energy consumption.
– Risk of clogging with highly charged effluent.
In conclusion, flue gas cleaning is an indispensable solution for reducing air pollutants and ensuring a cleaner environment and compliance with environmental standards in terms of air pollution. To find out more about our flue gas treatment services, contact Servithen today.
