Remediation Applications - Vapour Treatment

Refrigerated Condensation of VOCs
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Application

 

Treatment of volatile organic compounds (VOCs) in the vapour stream by condensation of contaminant from vapour phase to liquid phase.

Typical application is for treatment of soil vapour extraction (SVE) or multiphase extraction (MPE) off-gas

Recovered liquid chemicals can potentially be reused or recycled.
 

Advantages over traditional vapour treatment methods

  • ZERO DILUTION of influent air stream means shorter project times
  • No upper limit to VOC concentrations
  • Multiple constituents treated in a single process
  • Recovery of contaminant as a liquid chemical enables potential reuse and recycling
  • Overall efficiency increases at higher influent VOC concentrations
 
Technology Description
 
 

 

The refrigerated condensation system deploys 'C3 Technology' developed by G.E.O. Inc, California, comprising a combination of Cooling, Compression and Condensation processes with a proprietary regenerative adsorption stage, resulting in production of chemical as a non-aqueous phase liquid (NAPL) being available for subsequent reuse, recycling, or responsible disposal.

 
 Process description:
  • Contaminated vapour is extracted from the soil by a vacuum blower then transferred to an air compressor
  • Entrained liquid from extraction wells is separated from the vapour stream by the water knockout tank
  • The vapour stream containing VOCs is compressed to approximately 150 psi by the compressor.
  • Water vapour is condensed from the process stream at the air-to-air heat exchangers as it is cooled to ambient temperature.
  • The vapour stream is further cooled to approximately -40° C through refrigerated heat exchangers, where the chemical constituents (VOC's) are condensed and separated from the vapour stream.
  • The vapour stream is then passed through a regenerative adsorber, which removes any fugitive VOCs and directs it back to the inlet stream.
  • Depending on local emissions regulations, air stream discharge from the condensation unit may be passed through small vessels containing granulated activated carbon (GAC) for removal of minor residual levels VOCs before air is discharged to atmosphere.

 

 

Capacities

Typical refrigerated condensation unit capacities are in the range of 200, 300, and 500 CFM.  Smaller and larger modular systems can be provided to suit specific applications.

 

Removing efficiency in the range of 97 to 99.5% of VOCs.   Efficiencies are constituent dependant but removal of over 99% is typical for most common compounds at remediation sites.


 

Ordering Information

Refrigerated condensation units are provided on a lease package which includes lease of the equipment plus operation and maintenance of the system, incorporating minimum uptime guarantees.

 

Please contact us for further information or a proposal.

 

Manufacturer / Principal

Australian Project with C3 Technology Wins Award!

Australian Project with C3 Technology Wins Award!
300 CFM SVE & Compressor module
300 CFM SVE & Compressor module
Containerized refrigeration system
Containerized refrigeration system
Compressors & refrigeration system
Compressors & refrigeration system