EVAPORATION / CONDENSATION

HRSFUNKE uses a combination of shell and tube and scraped surface heat exchangers for the evaporation process. Both corrugated tube heat exchangers (HRSFUNKE I Series) and HRSFUNKE Scraped Surface Heat Exchangers have been used effectively for evaporation and concentration of various fluids in different applications.

EVAPORATION WITH FORCED RECIRCULATION

A recirculation pump is used to pump the fluid through the evaporator at many times the flow rate of the evaporator feed. A high fluid velocity is maintained and increased heat transfer coefficients are obtained in the evaporator. The forced recirculation evaporator is of special interest for applications with viscous fluids. The higher the viscosity, the worse the heat transfer becomes. Therefore recirculating with higher flow rates using the recirculation pump produces high heat transfer, enabling the evaporator design and surface area of heat transfer to be relatively small.

SCRAPED SURFACE EVAPORATION

For many environmental applications standard evaporation technologies are not ideal to achieve the desired performance. As the concentration of solids increases during the evaporation process the risk of fouling substances depositing on the tube wall increases. A fouled evaporator will drop quickly in terms of heat transfer and efficiency. The result is underperformance and regular shutdowns for cleaning. Plant shutdown is expensive in terms of maintenance and production costs. The solution HRSFUNKE proposes is their scraped surface heat exchanger evaporator. We have the capacity to supply evaporators with up to 100 square meters (1080 square feet) of heat transfer area. This allows us to provide solutions for heavy fouling applications with a high evaporation capacity.

APPLICATIONS

With multi effect evaporation the efficient use of existing energy created within the process means a reduced running cost. The evaporated water in the first effect is used as the heating media in the second effect. This process can be repeated several times so that 1kg of steam can evaporate several kilogrammes of steam from the product.
HRSFUNKE Heat Exchangers applies multi effect evaporation wherever possible. Combinations of multi effect evaporation and steam compression - mechanical vapour recompression or thermo compression, can be supplied for further energy optimisation. Another possibility of energy optimisation is combining an evaporator plant with a dryer plant. This solution works well for cases where an environmental waste stream is separated in solid phase and a liquid phase by mechanical separation - (centrifuge or decanter. The solid phase is sent directly to an indirect dryer. The liquid phase is sent to the evaporators. As energy for the evaporators we take the evaporated water of the dryer plant. The concentrate from the evaporator is mixed with the solid phase prior to sending to the dryer minimising the volume of environmental waste in the most energy efficient way possible

APPLICATIONS

  • Environmental Biomass and Biofuels
  • Food Industry Brine Digestate (biogas plant)
  • Fruit Concentrate
  • Water Stillage (from bioethanol plant)
  • Manure
  • Food and Agricultural Waste
  • Sludge
  • Other Effluents

  • Recommended Products:

    • HRSFUNKE I Series
    • HRSFUNKE SDI Series
    • HRSFUNKE Scraped Surface Heat Exchanger

Clients and Specifiers

capricole construction
wsp
jumeriah
masafi
wasl properties
command of militar work
almara
saudi binladin group
aecom
dssr