Vent & Vapours – condensation by mixing

Vent & Vapours – condensation by mixing2020-06-08T16:39:54+02:00

Exhaust gas & vapors – mixed condensation, system VMC

The Mixed Condensation System or Mixed Absorption System VMC is used for cleaning undesirable contaminants from waste gas, e.g. solvents, or for the targeted condensation of vapours, e.g. hot vapours that need to be cooled very quickly or contamination-prone condensation processes, by mixing with a cooled solvent or distillate circuit.

Advantages and functions

  • Mixed absorption (chemisorption / physisorption) of exhaust gas loads by means of specifically cooled and recirculated solvent flow
  • Mixed condensation of vapours by specifically cooled and recirculated distillate stream
  • Feasibility studies and concept selection, including optional test module for operation at the customer’s site
  • Specific boundary conditions (TA-Luft, ATEX, FDA, DGRL, …)
  • Batch operation and continuous operation
  • Options
    • Self-priming jet nozzle or nozzle/liquid distribution system for mixing the liquid with gas or vapours
    • Fractionated multi-stage absorption or condensation
    • Solvent circulation with cooling
    • Selection of solvents
    • Process-specific materials
    • Manual operation up to automation
    • Modular and mobile system
  • Straightforward operation, low maintenance, long service life
  • Fully automatic operation with SPS control and touch panel as standard equipment
  • Optional integration of the water deaeration in process control system and remote maintenance
  • Individual construction and dimensioning adapted to local conditions
  • Use of components and models specified by customers
  • Water deaeration as a compact, frame-mounted unit


Technical description

Waste gas or vapours are intensively mixed with the cooled liquid in a jet nozzle or column. This results in an intensive mass transfer of the gas and liquid phase at the desired homogeneous mixing temperature and specified process pressure, which leads to a defined depletion of the exhaust gas contents. Waste gas and liquid flow together into the temperature-controlled sump V01, where the cleaned waste gas is separated from the liquid and, depending on the process requirements, a vacuum pump or blower is connected downstream. The liquid which is led into sump V01 with the exhaust gas is collected, tempered and recirculated. For many batch processes, it is sufficient to treat the loaded liquid after the process; for larger loading quantities, continuous depletion or pumping of loaded solvent is required.

The process for vapour streams is similar. The quantity and temperature of the distillate pump is adjusted so that complete condensation takes place with defined subcooling of the distillate.

For the recovery of partial fractions, for example aromas in beverage production or partial components to be recovered from waste gas, a multi-stage mixed condensation with specifically adjusted individual process conditions (pressure & temperature) can be used.

Technical specification

Exhaust gas < 10 to 1.000 Nm3/h
Vapors < 10 to 5.000 kg/h
Operating pressure From vacuum to overpressure
Heating medium Process specific
Cooling medium Process specific
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