Method and device for utilising the waste heat that has accumulated during the supply of forced draught/compressed air to a printing press

摘要

The invention relates to a method for supplying forced draught/compressed air and drying air to a printing press, whereby the vacuum pumps or compressors required to supply said forced draught/compressed air are arranged together in a room with a separate air supply. The aim of the invention is to homogenise and if possible even condition air, in particular, process air for the printing press, whilst avoiding additional operating costs. To achieve this, the cooling air for the vacuum pumps or compressors is substantially conducted in a circuit, the heated exhaust air of the vacuum pumps and the heated cooling air of the vacuum pumps and compressors is cooled in a heat exchanger and is used to heat drying air that has been separated for this purpose.