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Special Municipal Waste to Energy Incineration Plant

NaHCO3 Solvair®
Active Carbon / Lignite
Ca(OH)2*MgO

Pre-ground SOLVAir® Sodium Bicarbonate and Active Carbon or Lignite Coke for Special Municipal Waste to Energy Incineration Plant

In the context of municipal waste management, waste-to-energy plants represent a strategic solution for significantly reducing the volume of municipal solid waste (MSW) through combustion. While these plants significantly contribute to reducing the amount of waste sent to landfill, the waste-to-energy process produces flue gases containing various pollutants, such as hazardous sulfur oxides (SOx), hydrochloric acid (HCl), hydrofluoric acid (HF), dioxins, furans, and heavy metals (mercury, lead, cadmium). These substances pose a significant challenge to environmental protection and public health. To keep emissions within regulatory limits, advanced flue gas treatment solutions are essential, including the combined use of Solvay SOLVAir® pre-ground sodium bicarbonate and activated carbon or lignite coke, with the optional addition of magnesium lime.

Solution with Pre Ground SOLVAir® Sodium Bicarbonate plus Active Carbon or Lignite Coke

More specifically, Solvay SOLVAir® pre-ground sodium bicarbonate plays a key role in neutralizing acids in flue gases, transforming them into stable, non-hazardous salts. At the same time, activated carbon and lignite coke, thanks to their exceptional adsorption capacity, are effective tools for trapping heavy metals and other harmful pollutants in exhaust gases. These additives are injected into the gases via separate dosing devices, allowing for adequate control and optimal precision in the distribution of the materials. This practice ensures high efficiency in exhaust gas purification and helps meet current environmental standards.

Magnesium Lime

Injecting magnesium lime directly into the combustion chamber proves particularly useful in certain situations, as it effectively neutralizes acids present at lower concentrations, complementing the neutralizing action of bicarbonate. Similar to activated carbon or lignite coke, it has the ability to adsorb various pollutants, including heavy metals, significantly improving filtration efficiency. This makes it a valuable optional additive when combined with bicarbonate and activated carbon or lignite coke.

Design and Realization

MetalTek specializes in the design and manufacture of high-quality mills and feeders with top-quality components. Our equipment is available in various configurations, and upon request, we can design customized loading and injection solutions for every need.

Metaltek Dosers Specialized for SOLVAir® Pre-ground Sodium Bicarbonate Metaltek Dosers Specialized for Active Carbon or Lignite Coke Metaltek Dosers Specialized for Magnesium Lime

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Metaltek Services: Assistance, Maintenance and Monitoring

Assistance, Maintenance and Monitoring Services on existing systems

Metaltek, with thirty years of experience in the sector, supplies cutting-edge systems for the purification of industrial fumes, designed to guarantee reliability, continuous efficiency and compliance with environmental regulations.

Thanks to our team of highly specialized consultants and designers, we create customized solutions that optimize the use of sodium bicarbonate, activated carbon, lignite coke and magnesium lime , reducing operating costs and waste. We offer timely assistance, professional analyses, teams equipped to work at heights and in confined spaces, and a constantly stocked spare parts warehouse. The quality and robustness of our systems, combined with global technical support and our Tek Lab analysis service make them ideal for flue gas purification where precision, reliability, and service continuity are essential.

Tek Lab by Metaltek: the exclusive fixed and mobile analysis laboratory for monitoring, testing and innovation

Tek Lab: Analysis and Innovation Laboratory

Tek Lab by Metaltek is a leader in the analysis of industrial fumes and residues. A cutting-edge technology to detect and address issues with overdosing or problems related to excess acids, dioxins, or other harmful compounds. It offers both on-premises analysis and on-site monitoring and analysis with its mobile laboratory.

Quality Products and exclusive Metaltek Services: a benchmark, the state of the art of Municipal Special Waste to Energy Incineration Plant

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Flue Gas Cleaning with Pre-ground Solvay SOLVAir® Sodium Bicarbonate, Active Carbon or Lignite Coke and Magnesium Lime

FAQ

What are the main pollutants in the flue gases of Waste-to-Energy plants for Municipal Solid Waste?

The generated flue gases include harmful substances such as SOx, HCl, HF, Dioxins, Furans, and heavy metals like mercury, lead, and cadmium, requiring effective treatment to minimize their impact on human health and the environment.

Why are premilled sodium bicarbonate and activated carbon/lignite coke used in the flue gas treatment of Waste-to-Energy (WtE) plants for Municipal Special Waste?

During the combustion process of Municipal Solid Waste (MSW), flue gases are released that contain dangerous pollutants such as SOx, HCl, HF, and heavy metals. Premilled sodium bicarbonate neutralizes these acids, reducing their threat, while activated carbon/lignite coke captures metals and other toxic compounds. This synergy significantly reduces harmful emissions.

What is the purpose of sodium bicarbonate in waste-to-energy processes?

Premilled sodium bicarbonate acts as an alkaline agent by neutralizing acids like HCl and HF present in the flue gases, turning them into harmless salts. This process reduces the acidity of the fumes and lessens the environmental impact of the emissions.

What is the role of activated carbon and lignite coke in flue gas purification?

Thanks to their high adsorptive capacity, these materials are effective in removing heavy metals and hazardous organic substances present in the flue gases generated from the combustion of MSW.

What are the advantages of using magnesiatic lime in the purification of municipal flue gases?

Using magnesiatic lime alongside sodium bicarbonate offers a superior approach in neutralizing acid pollutants in flue gases compared to using each component individually, in addition to improving the capture of heavy metals and ensuring compliance with environmental regulations on emissions.

Are activated carbon and lignite coke interchangeable in flue gas purification?

Both can be used effectively to treat the flue gases; however, activated carbon, with its higher porosity, is generally more efficient in adsorbing a wide range of contaminants. Lignite coke, on the other hand, might be more cost-effective under specific operational conditions.

Are there differences in the use of sodium carbonate versus sodium bicarbonate?

Both are used to neutralize the acids in the flue gases. Sodium bicarbonate, which decomposes into CO2, water, and active sodium carbonate, offers a more porous surface that facilitates interaction with acids, especially at low temperatures.

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