Solvent Recovery Adsorption and Distillation Systems
Proven solutions for EPA emissionscontrol requirements
Solvent Recovery Using Carbon Adsorption Technology
- Recover up to 99%+ of all industrial solventsfor re-use.
- Remove volatile organic compounds (VOCs) or hazardous air pollutants
(HAPs) from various kind of manufacturing process emissions to meet or exceed regulatory requirements.
- Increase profitability by reducing solvent expense by using solvent recovery process.
This is what a VCare solvent recovery system will mean to the Industries. These systems are based on today’s most advanced and reliable adsorption and distillation technologies. They are site- specific and add long-term value to
manufacturing operationallowing industries to produce high quality solvent-based products.
These are clear competitive advantages found with VCare solvent recovery systems
Carbon Adsorption: The Natural Method of Solvent Recovery
Carbon adsorption is based on a natural phenomenon in which volatile organic compounds are adsorbed from an air (or other gas) streamin the microscopic pores of
activated carbon and released when heated for recovery.
Activated carbon is the most versatileof all adsorbents because of its broad pore size distribution and pore volume. Consequently, it is suitable for solvents with a wide range of boiling points and chemical structures such as alkanes,alcohols, esters and ketones, cyclic compounds
and halogenated solvents.
- Proven solutions to address EPA emissions control requirements
- Recover solvents for reuse to reduce manufacturing costs
- Wide range of airflowsand solvent loadings
- Suitable for wide varietyof solvent types
- Very high emissions control and recovery efficiencies
- High turn-down ratio
- Materials of construction for minimal
maintenance and extended equipmentlife
- Designed for ease of maintenance and operability For Virtually any Process Generating Solvent-Laden Air
Carbonadsorption is the ideal VOC/HAP
emissions controlsolution for manufacturing processes that utilizevaluable solvents that recovered, could be reused in the process, generating substantial savings over other emissions control methods where the solventsare destroyed. Carbon adsorption is also ideal for VOC/HAPemissions systems from manufacturing processesthat emit halogenated solvents which would be
very costly to oxidizedue to the by- productsformed, the peripheral equipment required to treat them, and the associated capital costs.
Continuous and AutomaticProcessing of Solvent-Laden Air
A typical solventrecovery process consistsof an activated carbon adsorption unit with two, can be decided based on the process requirements. Adsorber vessels and if required, an air stripper or distillation unit. Solvent-laden air passes through a number of adsorber vesselsin parallel, where the solventvapors are adsorbedby specifically selectedactivated carbon. Once the carbon in an adsorber is saturated and solvent starts to slip, as detected by an optionalgas analyzer, the
solvent-laden air is routed to a standby adsorber and the saturated adsorber is regenerated.
Regeneration is accomplished by sending steam through a saturated adsorber,heating the carbon,and causing the adsorbed solventsto be released. The steam and solvent vapors that flow from the vessel are condensed into a liquid and cooled.Water immiscible solventsare separated from the water in a decanter and collected for reuse.
The water may be treated in an air stripper to remove small amounts of dissolved solventbefore disposal or reuseto produce steam.Solvents that are water miscible are separated from the water and purified in a distillation system.
Distillation, Purification andRecovery
Complete Systemsfor Separation and
Purification Water soluble solvents and multiple solventmixtures may need to be separated from the water and/or separatedinto their individual components prior to reuse.
VCare offers complete extractive and azeotropic multicomponent distillation systems for the separation and purification of solvent mixtures.Depending on customerand process requirements, these systems can be designed for either continuous or batch operations. In applications where the decanted water phase contains solvent levels which cannot be sent directly to drain or existingwater treatment facilities, VCare provides a steam or air strippingcolumn for solventremoval prior to discharge. In steam stripping, steam is admittedto the base of the column. As the contaminated feed water flowsdownward, solvents concentrate in the top of the column and are removed overhead in a condenser. The product then may be sent to storage or returned to the decanter.
In an air stripping operation, air is passed through the column counter-current to the flow of liquid.Solvent transfers to the air stream, which may be returned to the inletof the carbon adsorption unit, and purifiedwater suitable for disposal is
Typical Process/Product Applications
- Dyes and Intermediate
- Specialty Chemical
- Semiconductor and electronics
- Membrane Manufacturing
- Soil vapor extraction and ground waterremediation
- Rubber-coated fabrics
- Paper, film and foil coating
Publication and packaging gravure printing