Solvent Recovery | activated carbon | Steam regeneration ♻️ DEC.RSV™

Solvent Recovery Unit ️♻️ activated carbon
Steam regeneration (TSA) | DEC.RSG™ | DEC.SRU™

Solvent Recovery Units, based on activated carbon adsorption, steam regenerated, are using a technology which has been proven in thousands industrial applications (mainly for mono solvent systems), treating variable volumes of gaseous effluent (2.000 ÷ 1.000.000 Nm³/h); steam is used for the regeneration of the adsorption media (activated carbon), determining this process to be ideal for the recovery of non water miscible solvents or for solvents which do not form azeotropic mixtures with water: in this case you have to apply the inert gas (nitrogen, N₂) regeneration process DEC.RSG™

The Solvent Recovery Unit (SRU) is an advanced Air Pollution Control (APC) system designed to capture and recover volatile organic compounds (VOCs) from industrial process exhausts. This system utilizes the physical properties of high quality activated carbon to ensure high removal efficiency and resource circularity.

the solvent recovery process: how it works? ♻️ DEC.SRU_RSV™

The solvent recovery unit is formed by two or more activated carbon adsorbers, that alternate an adsorption phase with a regeneration one. The Solvent Laden Air (SLA), once it has been treated (filtered and conditioned), passes through the activated carbon bed of the adsorber that is in the adsorption phase: the carbon adsorbs the solvent and the air comes out cleansed. In the next phase a low-pressure steam flow, transferring heat to the activated carbon bed, desorbs the solvent. After it has been condensed, the solvent is sent to a static separator (decanter) or distillation systems to separate the organic phase from the water.

This recovered solvent can then be directly reused, providing significant cost savings and reducing the environmental footprint of the facility.

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Here is a simplified overview of how an activated carbon Solvent Recovery Plant (SRU | SRP | SRS), steam regenrated works ♻️ DEC.SRU_RSV™

Filtration: the SLA is filtered to remove most of the particulate matter; this is important to prevent the particulate matter from clogging the adsorption bed in the static concentrator;

Temperature control: the SLA is temperature-controlled to ensure that it is at the optimal temperature for adsorption; the optimal temperature will vary depending on the type of solvents being removed and the desired adsorption efficiency;

Adsorption: the SLA is driven through the static concentrator to adsorb the solvents; the activated carbon in the static concentrator adsorbs the solvents, thanks to its large surface area and variable porous structure;

Regeneration: once an AC adsorber is saturated with solvents, it is taken offline and regenerated; in-situ regeneration is used to (desorb) drive the solvents off of the activated carbon; a a low-pressure steam flow is injected to transfer the heat to the activated carbon bed, desorbing the solvents.

Condensation: the desorbed solvents are condensed in a heat exchanger, recovered in a tank;

Separation: the condensate is processed through a static separator or distillation systems to divide the water phase from the organic one;

Reuse: the recovered solvents can then be reused in the production process.

Technical Advantages ♻️ DEC.SRU_RSV™

DEC designs each SRU to meet specific industrial requirements, ensuring maximum efficiency and compliance with global emission standards. Key features include:

High Recovery Efficiency: systems typically achieve VOC recovery rates exceeding 99%;

Energy Optimization: integrated heat recovery systems minimize steam consumption during the desorption cycle (ULP™ and WHR™ modules, ECOVAP™);

Durability: the use of premium activated carbon (ACA™) ensures a long media lifespan and consistent performance;

Safety: redundant sensors and automated control systems monitor LEL (Lower Explosive Limit) levels and temperature.

choose from our Smart Modular or Custom Built Systems

DEC Solvent Recovery Units (SRUs) are available in both skid modular layout (DEC.SMS™ • Smart Modular Systems, pre-built and pre-tested at our workshops) or in full customizable version (DEC.CBS™ • Custom Built Systems, with on-site erection).

get a free consultation

If you are looking for a reliable and efficient solvent recovery unit, DEC.SRUs™ (Solvent Recovery Units) are the right and best option: DEC.SRUs™ are the most advanced and reliable Solvent Recovery Units on the market, with processes, configurations and options to meet the needs of different applications, present and future challenges.

Contact DEC for a free consultation: we can help you assess your needs and recommend the best SRU for your operation.