Electricity is used to produce compressed air. Approximately 10% of all industrial electricity consumption can be attributed to the production of compressed air. In order to use energy efficiently, the heat that is generated when the air is compressed should be used to heat the worksite, for example.

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Based on its previous experience with CO₂ capture plants and its expertise with gas-liquid absorbers, ANDRITZ selects the most suitable solvent blend for a given CO₂ concentration in the flue gas and a targeted capture rate. Depending on the customer's solvent preference, ANDRITZ can also design a solution based on hot potassium carbonate (HPC).

CompressedAircan for PC

In the case of the HPC solvent, the figure would look slightly different as the potassium carbonate operates on a pressure swing absorption/desorption cycle as compared to the amine-based solvent which operates on a temperature swing absorption/desorption cycle.

The energy requirements for solvent regeneration (heat of desorption, sensible heat, and heat of vaporization) and the correct energy integration of the CO₂ capture unit into the industrial process are key features of the ANDRITZ CO₂ capture offering. Depending on the CO₂ concentration in the flue gas, the required amount of CO₂ to be captured, and other site-specific conditions (steam availability, steam pressure, on-site CO₂ storage, ...), ANDRITZ will design a unique solution to ensure the lowest operating costs for the removal of CO₂ from the flue gas.

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ANDRITZ has over 130 years of experience in designing and building clean air technologies equipment. From single to multi-pollutants control equipment, adapted for heat recovery when needed, ANDRITZ solutions range from dedusting, desulphurization, denitrification, mercury control technologies to combined/multi-stage and multi-pollutants systems.

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As shown in the figure, for an amine-based solvent, the CO₂-rich flue gas from the industrial process first enters a pre-scrubber where it is cooled (or quenched) and further treated to remove certain contaminants (acid gases, particulates, etc.) that would degrade the solvent.

Compressedairfor cleaning PC

ANDRITZ has an extensive experience across all major industries, Pulp & Paper, Iron & Steel, Metals, Waste to Energy (incl. RDF and sludge), Mining, Biomass and Utility, ANDRITZ provides you with a comprehensive portfolio of clean air technologies solutions focusing on reduced emissions, improved performance and efficiency to meet your operation strategies.

ANDRITZ is accelerating its activities to deploy with its customers technologies reducing carbon dioxide (CO2) emissions.

Nine out of ten industries use compressed air daily. Compressed air acts as an energy source for a variety of tools and machinery, and it is often an important and well integrated part of many production processes. Compressed air is often used for blowing with air blow guns, air nozzles and air knives to to generate movements and lifting, or to clean, move or cool materials.

Several solvents are available for CO₂ capture by chemical absorption. The most commonly used solvent is based on the primary amine monoethanolamine (MEA) and/or mixtures of secondary/tertiary amines, usually with the addition of promoters such as piperazine.

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Compressed air is often seen as a clean and safe energy source that can be easily used for a number of different industrial purposes.

The flue gas then enters the absorption unit (or column) where the CO₂ is continuously absorbed (or scrubbed) by the solvent. The absorption process utilizes the reversible chemical reaction of CO₂ with the solvent. The CO₂-lean and clean flue gas leaves the top of the absorber towards the stack. The CO₂-rich solvent is transferred to the desorption unit (or stripper). Hot and partially fresh solvent from the reboiler enters the desorption unit, causing the CO₂ to be stripped from the solvent. As a result, a stream of pure CO₂ is collected at the top of the stripper. The CO₂ lean solvent is then regenerated and circulated to the absorber. The pure CO₂ stream is further processed to the required purity before being compressed, transported, or stored for future use (enhanced oil recovery, chemical synthesis, geological storage, etc.).

Silvent helps manufacturers with energy optimization and improved working environments. The headquarters is in Sweden where all research and development are done. The company has unique expertise in the area of compressed air dynamics. Silvent’s air guns, air knives, air nozzles, silencers and customized solutions for blowing with compressed air are used by leading manufacturers, in over 95 countries. Silvent is part of Lifco Group that is listed on Nasdaq Stockholm.