Preheating sludge in a wastewater treatment plant
An installation with four heat exchangers of the sludge / water type at the RWZI Bath (Province of Zeeland) Netherlands – Wolter and Dros for Waterschap Brabantse Delta. Two heat exchangers extract energy from the sewage sludge, while two others use this energy to heat and maintain the temperature of the digestion sludge.
Design based on the kW requirement
The whole design is based on the kW requirement, in this specific case 550 kW. In this case we chose a type of heat exchanger that can handle large flow fluctuations (+-50%). One of the specific characteristics of the Lackeby heat exchangers is the patented reversing chambers, which ensure optimal sludge mixing and homogenous sludge temperature. Good insulation ensures that heat losses are reduced to an absolute minimum. Moreover, the space requirements of these heat exchangers are minimal compared to other types of heat exchangers. An additional advantage is that the modules are stackable.Läckeby sludge/water heat exchangers are the result of innovative thinking and 40 years of experience in this field
This range of units was developed to meet the very specific requirements of sludge heating or cooling. The unique, patented design has resulted in a compact heat exchanger with minimal maintenance requirements. Advantages of Läckeby heat exchangers Läckeby heat exchangers are compact, robust, easy to install, easy to maintain and highly reliable. The round sludge channels reduce the risk of clogging. The innovative design with the patented turning chambers ensures high energy transfer and low pressure losses. Moreover, maintenance is fast: just a few loosening bolts and hinged turning chambers.Advantages of Läckeby heat exchangers
Läckeby heat exchangers are compact, robust, easy to install, easy to maintain and highly reliable. The round sludge channels reduce the risk of clogging. The innovative design with the patented turning chambers ensures high energy transfer and low pressure losses. Moreover, maintenance is fast: just a few loosening bolts and hinged turning chambers.
Sludge applications
- Direct heating or cooling of sludge on the feed line
- Heating and/or cooling of digested sludge over the digester or pasteuriser
- Energy reuse from hot sludge
Water treatment applications
- Cooling of wastewater in e.g. biological water treatment systems
- Energy recovery from outgoing wastewater
Read more about Läckeby heat exchangers on our energy recovery page.
