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Sludge/water heat exchanger

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article image A compact heat exchanger with minimal maintenance needs.

INNOVATIVE thinking and 40 years experience in the municipal and industrial wastewater sector led Lackeby Products from Sweden to develop its unique VSV sludge/water heat exchanger.

Available from Pump Systems , the VSV heat exchanger can also be used for sludge-to-sludge heating applications using two units with closed circuit water loop and pump.

The all-stainless steel, insulated high performance heat exchanger has been developed to meet special requirements for the heating or cooling of sludge in wastewater treatment plants. The unique patented design provides a compact heat exchanger with minimal maintenance needs.

Lackeby Products manufactures heat exchangers for sludge/water based on a modular principle with circular sludge channels which means the design can be adapted to each wastewater treatment plant’s unique conditions. The channels provide a large throughput area that keeps pressure loss low and minimises the risk of clogging.

Each level of sludge channels is surrounded by a rectangular water circuit, in which water for heating/cooling flows in the opposite direction to the sludge. The unique patented open turning chamber contributes to a compact design that is simple to install.

Inspection, disassembly and maintenance are made easy because the turning chambers are mounted on a common flange. The turning chambers provide even higher heat transfer by equalising the sludge's temperature profile.

Based on a modular principle and with patented turning chambers, the compact VSV heat exchanger design delivers low running costs.

Technical features include: unique design specifically for sludge; patented turning chambers; compact unit that is easy to install; simple inspection and maintenance; and high heat transfer. The VSV design eliminates problems associated with multiple flanges and loose connections.

The Lackeby VSV heat exchanger enhances efficiency of digestion and hygenisation and equalises temperature profile of sludge. The large throughput area provides process benefits such as reduced pressure losses and minimises the risk of clogging.

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