Lackeby Heat exchanger sludge/sludge

Lackeby Heat Exchanger sludge_sludge-1

Lackeby Heat exchanger sludge/sludge is a further development of the Lackeby Heat exchanger sludge/water. The unit, which combines innovative thinking with 40 years’ of experience in this sector, has been developed for the special requirements set for heat recovery from hygenisated or digested sludge. This unique patented design provides a compact unit with minimal maintenance requirements.

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Lackeby Heat exchanger sludge/sludge consists of two Lackeby Heat exchangers sludge/water connected by a closed water circuit. This creates a compact unit that is simple to install and minimises installation volume. The closed water circuit between the heat exchangers eliminates the risk of digested or hygenisated sludge being contaminated by raw sludge. Circular sludge channels deliver a large throughput area, which means low pressure loss and a minimised risk of clogging. Inspection, disassembly and maintenance are made easier because the patented turning chambers are mounted on a common flange. The turning chambers also provide higher temperature transfer by equalising the sludge’s temperature profile. Based on a modular principle and patented turning chambers, the compact design delivers low running costs. This makes the Lackeby Heat exchanger sludge/sludge a good investment.


Lackeby Heat exchanger sludge/sludge is a compact design with circular sludge channels surrounded by rectangular water circuits. Based on a modular principle and patented turning chamber, the heat exchanger unit can be adapted to the unique conditions of each plant. As standard, the heat exchanger unit sludge/sludge is manufactured in stainless steel (1.4436), duplex (1.4162) and with cover plates and supports in stainless steel (1.4301).

Technical features

Process benefits

  • Unique design specifically for sludge
  • Compact unit that is easy to install
  • Simple inspection and maintenance
  • High heat transfer
  • Large throughput area
  • Closed water circuit between two separate heat exchangers
  • Patented turning chamber
  • Enhances efficiency of digestion and hygenisation
  • Makes maintenance easier and eliminates problems with multiple flanges and loose connections
  • Minimises installation volume
  • Reduces pressure losses
  • Minimises risk of clogging
  • Eliminates risk of sludge contamination
  • Equalises the sludge’s temperature profile