The designations "REKUGAVO" and "REKULUVO" describe two highly efficient, fully welded plate heat exchangers for gaseous products, working according to the countercurrent principle. This system allows achieving very high heat recovery rates in an economically efficient manner.
The heat transfer surfaces consist of two profiled plates with a high specific capacity which are assembled into self-supporting packs. Both gases flow through the plates in countercurrent and are separated from each other without leakage. Mixing of the two gas streams and a possible transfer of pollutants is thus almost completely excluded.

The REKULUVO (from German "Rekuperativer Luftvorwärmer", i.e. "Recuparative air pre-heater") is particularly suitable for pre-heating the combustion air in petrochemical plants (fired heaters) or in methanol and ammonia plants.
The REKUGAVO (from German "Rekuperativer Gasvorwärmer", i.e. "Recuperative gas pre-heater") is the perfect heat exchanger for heating up flue gas to the catalyst reaction temperature, e.g. in denitration units of refuse incinerating plants.

Depending on requirements, the recuperative heat exchanger can have single- or double-stage design. The hoods provided below and above the heat exchanger packs serve for feeding and discharging and/or for combining the individual volumetric flows from the gases connected in parallel. The hoods can be designed as required, with the products always flowing vertically between the plates, making cleaning much easier.

Technical data:

• Products: air or flue gas
• Volumetric flows: 5,000 m3/hr min., 2,000,000 m3/hr max.
• Temperature: up to 600 °C max.
• Pressure range: atmospheric +/- 200 mbar
• Recovery rate: up to 97 %
• Materials: ferritic and austenitic